Consulta: typeFacets:"Text"
Registros recuperados: 45.096
Máximo de registros impressos: 2500
Data/hora: 29/05/2024 03:37:07

Les nouvelles méthodes de récolte et le repeuplement des champs de laminaires
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Perez, René.
L'exploitation des laminaires qui, en France, semblait destinée à disparaître alors que paradoxalement elle se développe remarquablement dans les autres pays, va-t-elle redevenir l'une des activités importantes de nos côtes ? Les efforts effectués durant ces dernières années afin de créer de nouvelles techniques sont sur le point d'aboutir. Désormais, des systèmes mécanisés montés sur des bâteaux spéciaux du type "Tali", c'est-à-dire munis d'une "suceuse" aspirant les algues coupées par des plongeurs sous-marins ou du type "Jean Ogor" sur lequel la récolte est assurée par une sorte de tourniquet arrachant les algues par touffes, vont remplacer la faucille traditionnelle.
Tipo: Text
Ano: 1968
URL: http://archimer.ifremer.fr/doc/1968/publication-7285.pdf

Contrat de plan Etat-Région Bretagne 1983-1988. Mytiliculture en mer ouverte. Bilan des travaux
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Muller-feuga, Arnaud; Bompais, Xavier.
Le docunent dresse le bilan des actions menées par l' IFREMER en matière de mytiliculture en mer ouverte, dans le cadre du contrat de plan Etat/Région Bretagne 1983 /88. Il présente les résultats des études théoriques, les moyens d 'infonmation déployés auprès du grand public et des professionnels, ainsi que le programme d'élaboration et de mise au point de la nouvelle flièère mytilicole dite "Sub  Flottante".
Tipo: Text
Palavras-chave: Mytiliculture; Longues-Lignes; Mer ouverte; Contrat de Plan.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00426/53731/54606.pdf

Distribution of upwelling index planktonic-foraminifera in the sediments of the western continental-margin of india
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Naidu, Pd.
Tipo: Text
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00131/24252/22245.pdf

Rapport de mission sur la conférence mondiale sur l'aquaculture, organisée conjointement par la World Aquaculture Society et la European Aquaculture Society. Florence, Italie, 9-13 mai 2006
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lacroix, Denis.
Ce congrès était organisé conjointement par les deux grandes associations de développement de l'aquaculture dans le monde: la World Aquaculture Society (WAS, 2300 membres) et la European Aquaculture Society (EAS, 550 membres). Le précédent s'était tenu à Nice, en mai 2000. Il a rassemblé pendant 5 jours plus de 3000 chercheurs et responsables institutionnels de 95  nationalités. Environ 600 communications orales étaient réparties sur 67 sessions suivant un système de 11 salles en parallèle. Entre les salles de conférence étaient présentés les panneaux  des 460 posters. Sur le site, l'exposition commerciale accueillait 135 entreprises et organismes; elle a reçu la visite d'environ 2000 visiteurs dont la moitié d'Italiens (source: EAS).  Le thème général du...
Tipo: Text
Palavras-chave: Aquaculture; Technologie; Systèmes d'élevage; Durabilité; Qualité.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00343/45371/44867.pdf

Atlas des invertébrés du Golfe de Gascogne inventoriés dans les captures des chaluts. Campagnes RESSGASC 1992-1995 et EVHOE 1995
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Paulmier, Gerard.
Numerous invertebrates were collected during various scientific trawling surveys carried out in the Bay of Biscay (RESSGASC, EVHOE), and the adjacent areas between 1993 and 1995. The species captured by the same trawling methods used by professional fishermen represent only a fraction of the known invertebrate fauna in the Bay. In addition to an inventory of the species, a simple key allows easy access to faunistic groups. The species, some of which are economically interesting, form the subject of a short description and, for the most part, a colour illustration.
Tipo: Text
Palavras-chave: Invertebrates; List; Trawling; Gulf of Biscay; Atlas; Invertébrés; Inventaire; Chalutage; Golfe de Gascogne; Atlas.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/1997/rapport-709.pdf

Fossil hydrothermal sulfide deposits at the galapagos-spreading-centre near 85-degrees-00 west - geological setting, mineralogy and chronology
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lalou, C; Brichet, E; Lange, J.
Tipo: Text
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00106/21749/19322.pdf

From seasonal patterns to a reference situation in an estuarine environment: Example of the small fish and shrimp fauna of the Gironde estuary (SW France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lobry, Jeremy; Lepage, Mario; Rochard, Eric.
Detecting changes in animal communities suggests that a reference situation exists. It is a particularly difficult task in estuarine environments that are complex and fluctuate with time. Effects of human pressures are difficult to assess due to the scarcity or even the lack of evaluation and monitoring systems. In order to detect anomalies in the functioning of the system and to identify effects of perturbations upon populations and communities, it is necessary to analyse the dynamics in order to infer a reference state. This work aims to describe an approach based on K-Tab analyses and allows to define an average situation called "compromise" which is then compared to a single year of data. In this situation, the Gironde estuary, which has been monitored...
Tipo: Text
Palavras-chave: Fish and shrimp assemblages dynamics; Gironde estuary; Correspondence analysis; Spatial pattern; STATIS.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1989.pdf

Seismic study of the transform-rifted margin in Davis Strait between Baffin Island (Canada) and Greenland: What happens when a plume meets a transform - art. no. B04402
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Funck, T; Jackson, H; Louden, K; Klingelhoefer, Frauke.
[ 1] The Davis Strait transform margin was studied using a 630-km-long wide-angle reflection/ refraction seismic transect extending from SE Baffin Island to Greenland. Dense airgun shots were recorded by 28 ocean bottom seismometers deployed along the line. A P wave velocity model was developed from forward and inverse modeling of the wide-angle data and incorporation of coincident deep multichannel reflection seismic data. Off Baffin Island in the Saglek Basin, 7 to 11-km-thick two-layered continental crust (5.8 - 6.6 km/s) is observed. Off Greenland, continental crust is divided into three layers (5.4 - 6.8 km/s) with a maximum thickness of 20 km. Farther offshore Greenland the crust thins to 7 - 12 km and the lower crust disappears. Between the...
Tipo: Text
Palavras-chave: Magmatic underplating; Refraction seismics; Transform margin.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-4393.pdf

Tide and surge dynamics along the Iberian Atlantic coast
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Alvarez Fanjul, E; Perez Gomez, B; Carretero, Jc; Rodriguez Sanchez Arevalo, I.
The eastern Atlantic barotropic dynamics (in a region spanning from 20 degrees N to 48 degrees N and 34 degrees W to 0 degrees) are studied through numerical modelling and in situ measurements. The main source of data is the tidal gauge network REDMAR, managed by Clima Maritimo (Puertos del Estado). The numerical model employed is the HAMSOM, developed both by the Institut fur Meereskunde (Hamburg University) and Clima Maritime. In this paper, tidal and storm surge dynamics are studied for the region, focusing particularly on the nonlinear transfer of energy between the different forcings. The results of tidal simulations show good agreement between semidiurnal harmonic components and the values obtained from the tidal gauges (both coastal and pelagic) and...
Tipo: Text
Palavras-chave: Onde de marée; Marée; Vague; Couplage; Réseau de marégraphie REDMAR; Surge; Tide; Wave; Model coupling; Tide gauge network REDMAR.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00326/43674/43197.pdf

Lake Tutira paleoseismic record confirms random, moderate to major and/or great Hawke's Bay (New Zealand) earthquakes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gomez, Basil; Corral, Alvaro; Orpin, Alan R.; Page, Michael J.; Pouderoux, Hugo; Upton, Phaedra.
Robust regional seismic-hazard assessments require millennial-scale paleoseismic histories that extend far beyond the range of historical and instrumental data. However, it is difficult to resolve the probability density functions for earthquake recurrence from the limited number of major to great earthquakes most paleoseismic records contain. Lake sediment records are repositories of information about paleoearthquake recurrence, with a sensitivity and fidelity over millennial time scales that suggest that they have the potential to yield reliable estimates of the recurrence distribution. We present a 7000 yr paleoseismic record from Lake Tutira (North Island, New Zealand) that ranks among the most detailed Holocene paleoearthquake chronologies available...
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00352/46276/46043.pdf

Determination of ultra-low U-236/U-238 isotope ratios by tandem quadrupole ICP-MS/MS
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tanimizu, Masaharu; Sugiyama, Naoki; Ponzevera, Emmanuel; Bayon, Germain.
Isotope ratios of U-236/U-238 were measured at levels below 10(-7) by single collector ICPMS with a tandem quadrupole mass separation mechanism. Peak tailing of the prominent U-238(+) ion beam on the U-236(+) peak was reduced to the level of similar to 10(-10) by use of two quadrupole mass filters. The (UH+)-U-235 interference on U-236(+) was efficiently reduced to a UH+/U+ ratio of 1 x 10(-8) by an ion-molecule reaction between UH+ and O-2 in a collision/reaction cell placed between the two quadrupoles. The resultant detection limit for U-236/U-238 measurement was better than those reported by any other ICPMS study. The U-236/U-238 ratios, measured as (UO+)-U-236-O-16/(UO+)-U-238-O-16, were determined in the range 10(-9) to 10(-7) without correction for...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00152/26358/24440.pdf

Rapport ObsDEB - Estimation 2014 des efforts de pêche et des productions dans les régions Méditerranée continentale, La Réunion, Martinique, Guadeloupe et Guyane.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Blanchard, Fabian; Lespagnol, Patrick; Weiss, Jerome; Demaneche, Sebastien; Bourjea, Jerome; Evano, Hugues; Reynal, Lionel; Guyader, Olivier; Baulier, Loic; Merrien, Claude; Leblond, Emilie; Daures, Fabienne; Berthou, Patrick; Leblond, Samuel.
Le programme d’observation des marées au débarquement, appelé « ObsDEB », contribue à l’estimation de l’effort de pêche et des captures des flottes de pêche françaises. Il vise tout particulièrement les flottilles de petite pêche côtière et procède à la collecte des informations requises selon un plan d’échantillonnage adapté à chaque région suivie. Ce rapport est le Rapport annuel de Convention DPMA-Ifremer 2015 et présente les estimations 2014 des efforts de pêche et des productions dans les régions Méditerranée continentale, La Réunion, Martinique, Guadeloupe et Guyane.
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00326/43714/43159.pdf

Characterization of molecular processes involved in the pearl formation in Pinctada margaritifera for a sustainable development of pearl farming industry in French Polynesia
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gueguen, Yannick; Montagnani, Caroline; Joubert, Caroline; Marie, Benjamin; Belliard, Corinne; Tayale, Alexandre; Fievet, Julie; Levy, Peva; Piquemal, David; Marin, Frederic; Le Moullac, Gilles; Ky, Chin-long; Garen, Pierre; Lo, Cedrick; Saulnier, Denis.
Tahiti’s pearl farming industry plays a major socio-economic role in French Polynesia. In an increasingly competitive market where the production of high quality pearls becomes essential, research can help secure and ensure sustainable production. In that context, Ifremer, in close collaboration with the “direction des resources marines” (French Polynesian government agency) has developed research projects on the “sustainable development of pearl farming”. This program is organized along 3 axes: (1) understanding the animal physiology and initiating a genetically selective breeding program of donor oysters; (2) understanding pearl oyster larvae dispersal and recruitment; (3) understanding the molecular mechanisms underlying biomineralization processes...
Tipo: Text
Palavras-chave: Pearl oyster; Biomineralization; Pinctada margaritifera.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00167/27840/26049.pdf

What caused G. truncatulinoides to calcify in shallower water during the early Holocene in the western Atlantic/Gulf of Mexico?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cleroux, Caroline; Lynch-stieglitz, Jean.
In a recent paper we reconstructed the calcification depth of G. truncatulinoides since the last deglaciation in the Florida Straits. We highlighted a significantly different calcification depth between 8-10 ka and the late Holocene. This migration was found in three different cores over the western North Atlantic American continental margin. This paper presents new Mg/Ca ratio data on G. truncatulinoides in the Florida Strait and new stable isotopic measurements on G. crassaformis in the Gulf of Mexico. Preliminary interpretation to understand the cause of G. truncatulinoides migration in the water column at the beginning of the Holocene is given.
Tipo: Text
Ano: 2010
URL: https://archimer.ifremer.fr/doc/00496/60752/65139.pdf

Correlation between perkinsosis and growth in clams Ruditapes spp.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dang, Cecile; De Montaudouin, Xavier; Binias, Cindy; Salvo, Flora; Caill-milly, Nathalie; Bald, Juan; Soudant, Philippe.
Perkinsosis is one of the most widespread diseases affecting commercially important species of molluscs globally. We examined the impact of Perkinsus spp. on shell growth at the individual scale in 2 clam species: Ruditapes decussatus from Mundaka Estuary (Spain) and R. philippinarum from Arcachon Bay (France). At Arcachon, 2 contrasting sites in terms of environment and Perkinsus olseni presence were chosen: Arguin (disease-free) and Ile aux Oiseaux (infected site). We monitored the dynamics of perkinsosis over the course of the experiment at Mundaka and Ile aux Oiseaux. Prevalences were high (&gt;70%), and intensities were around 10(5) cells g(-1) wet gills at Ile aux Oiseaux, and 10(6) cells g(-1) at Mundaka. No significant differences in prevalence or...
Tipo: Text
Palavras-chave: Clams; Perkinsus spp.; Perkinsus olseni; Ruditapes philippinarum; Ruditapes decussatus; Growth.
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00166/27733/25951.pdf

Digital expression profiling of novel diatom transcripts provides insight into their biological functions
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Maheswari, Uma; Jabbari, Kamel; Petit, Jean-louis; Porcel, Betina M.; Allen, Andrew E.; Cadoret, Jean-paul; De Martino, Alessandra; Heijde, Marc; Kaas, Raymond; La Roche, Julie; Lopez, P.; Martin-jezequel, Veronique; Meichenin, Agnes; Mock, Thomas; Parker, Micaela Schnitzler; Vardi, Assaf; Armbrust, E. Virginia; Weissenbach, Jean; Katinka, Michael; Bowler, Chris.
Background: Diatoms represent the predominant group of eukaryotic phytoplankton in the oceans and are responsible for around 20% of global photosynthesis. Two whole genome sequences are now available. Notwithstanding, our knowledge of diatom biology remains limited because only around half of their genes can be ascribed a function based onhomology-based methods. High throughput tools are needed, therefore, to associate functions with diatom-specific genes. Results: We have performed a systematic analysis of 130,000 ESTs derived from Phaeodactylum tricornutum cells grown in 16 different conditions. These include different sources of nitrogen, different concentrations of carbon dioxide, silicate and iron, and abiotic stresses such as low temperature and low...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00017/12810/9758.pdf

Préparation de crevettes (Pandalus borealis) cuites décortiquées en saumure. Intérêt de l'ionisation préalable des crevettes et de l'incorporation d'acide benzoïque dans le produit fini.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vallet, Jean-luc; Cornet, Josiane; Knockaert, Camille.
Chaque année, plus de 400 tonnes de crevettes Pandalus borealis sont importées du Danemark, soit sous forme congelée, soit pour l'essentiel préparée en saumure. Dans la majorité des cas, les sociétés françaises importent ces produits pour une revente directe, ou éventuellement après reconditionnement en contenants plus petits et étiquetage à leur marque. De par la réglementation, aucune société française n'est actuellement en mesure de fabriquer de tels produits. En effet cette préparation en saumure est une semi-conserve à entreposer au froid (+ 4°C) qui fait appel, outre à l'acide citrique, à l'acide benzoïque et parfois à l'aeide sorbique pour assurer une conservation de 4 à 9 semaines. En France l'acide benzoïque est autorisé pour la seule conservation...
Tipo: Text
Ano: 1986
URL: http://archimer.ifremer.fr/doc/00119/22993/20824.pdf

Report of the Benchmark Workshop on Pelagic Stocks. 6–10 February 2017, Lisbon, Portugal
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ICES.
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00415/52666/53526.pdf

Le chalutage pélagique et notes sur ce chalutage avec panneaux Suberkrub
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Portier, Marcel.
Following the trials conducted in 1958/59 by German trawlers, the I.S.T.P.M. tested for the first time, in 1960, on the Roselys, a 120 CV oceanographic research vessel, a pelagic trawl using a boat equipped with a headrope sounder. The trawl was a double panel trawl with an opening perimeter of 500 80 mm meshes. The lateral opening was made through hydrodynamic Süberkrüb doors of 1,7 sq. meters and 130 kg. Finally, an Atlas Werke netzsonde whose oscillator was set on a platform towed behind a headrope, was transmitting information about the opening and sinkage depth of the trawl to the bridge. The cable only had one conductor and the answer was transmitted through the water. Since then, new cables with two coaxial conductors have been used and results are...
Tipo: Text
Palavras-chave: Suberkrub doors; Roselys; Netzsonde; Pelagic trawl; Fishing technology; Panneaux Suberkrub; Sondeur de corde de dos; Netzsonde; Roselys; Chalut pelagique; Technology des pêches.
Ano: 1970
URL: http://archimer.ifremer.fr/doc/1970/rapport-3407.pdf

Version évolutive de l’outil opérationnel de numérisation et d’analyse semi-automatique d’images de phytoplancton, utilisant le matériel FlowCAM et le logiciel ZooPhytoImage. Nouvelles perspectives
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Wacquet, Guillaume; Grosjean, Philippe; Colas, Florent; Hamad, Denis; Artigas, Luis Felipe.
The coupled system FlowCAM/ZooPhytoImage has become a real operational tool in 2014. However, to be fully adapted to the observations of phytoplankton performed in the context of the REPHY observation network and in order to better respond to present and future requests concerning the evaluation of quality of coastal and marine waters within the European requirements, such as the WFD and MSFD, new functionalities must be integrated into existing tools. Therefore, different axis of development have been proposed by UMONS and Ifremer to adapt both the digitization device and the Zoo/PhytoImage software to the constraints defined by the REPHY. First, version 5 of Zoo/PhytoImage contains recent innovations such as the development of routines to automatically...
Tipo: Text
Palavras-chave: Plancton; Analyse automatisée; Analyse d'image; Classification supervisée; Apprentissage actif; Dénombrement de cellules; Plankton; Automated analysis; Image processing; Supervised classification; Active learning; Cells counting.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00389/49986/50573.pdf

Technical and physical challenges to achieve a regional simulation at multi-decadal scales: Applications to the Bay of Biscay.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Theetten, Sebastien; Vandermeirsch, Frederic; Assassi, Charefeddine; Charria, Guillaume.
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00195/30652/29120.pdf

Large-scale genetic patchiness among NE Atlantic populations of the brittle star Ophiothrix fragilis
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Muths, D.; Jollivet, D.; Gentil, F.; Davoult, D.
The brittle star Ophiothrix fragilis (Abilgaard, 1789) constitutes a heterogeneous morphological group that can be subdivided into 4 varieties. The species is also characterized by high demographic variability. The present study explores the possibility of genetic patchiness arising due to admixture of varieties or recruitment heterogeneity. We sequenced a portion of the mitochondrial cytochrome oxidase subunit I (mtCOI) gene and genotyped 7 allozymes from 21 populations of the 2 most common varieties. While mtCOI analyses showed that all the varieties grouped together with virtually no divergence among them (&lt; 1%), a clear divergence (18.6%) was evident between the northern Atlantic populations and individuals collected in the Mediterranean and along...
Tipo: Text
Palavras-chave: Echinoderm; Allozyme; MtCOI; Population dynamics; Ecotypes; Dispersal; Recruitment.
Ano: 2009
URL: https://archimer.ifremer.fr/doc/00301/41247/40439.pdf

Analysis of shell colour determinism in the Manila clam Ruditapes philippinarum
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Peignon, Jean-marie; Gerard, Andre; Naciri, Yamama; Ledu, Christophe; Phelipot, Pascal.
The Manila clam presents a large polymorphism for shell colours and patterns. No experiment has been conducted to study the determinism of such a polymorphism which has been well known for a long time. The aim of this study was firstly to determine the genetic variation for shell colour and secondly to produce some homozygous lines for the shell colouring. These lines could then be used as controls for laboratory experiments. The colouring is defined by three characters: asymmetry, ornamentation and hue. Clams with asymmetrical colouring are not fully pigmented, except for a posterior band on the left valve. Clams with symmetrical colouring are fully pigmented on the two valves. Four cross series were conducted between the different characters: Asymmetry...
Tipo: Text
Palavras-chave: Mollusque; Bivalve; Palourde; Ruditapes philippinarum; Génétique; Hérédité mendélienne; Coloration; Asymétrie; Mollusc; Bivalve; Manila clam; Ruditapes philippinarum; Genetics; Mendelian inheritance; Colouration; Asymmetry.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/1995/publication-3204.pdf

Routes of Agulhas rings in the southeastern Cape Basin
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dencausse, Guillaume; Arhan, Michel; Speich, Sabrina.
Using weekly sea surface height data Agulhas rings from the period October 1992 to December 2006 are detected and tracked from their formation dates and throughout the Cape Basin While 102 of them formed at the Agulhas Current retroflection their subsequent subdivisions and junctions led to 199 trajectories The rings geographical probability of presence shows two maxima One related to numerous ring passages lies in the submarine bight formed by the Erica seamount the Schmitt-Ott seamount and the northeastern tip of the Agulhas Ridge The other one to be ascribed to topographic blocking of the eddies is southeast of the latter obstacle On the basis of topographic effects three routes for Agulhas rings are distinguished a Northern route for rings that enter...
Tipo: Text
Palavras-chave: Agulhas rings; Indo Atlantic exchanges; Altimetry.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00019/13041/11315.pdf

Filets à Poissons plats. Occitanie. 2017. Observation des Marées au débarquement - OBSDEB
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public. Ces indicateurs intègrent...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00596/70826/69059.pdf

Fat deposition and flesh quality in seawater reared, triploid brown trout (Salmo trutta) as affected by dietary fat levels and starvation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Regost, Christelle; Arzel, Jacqueline; Cardinal, Mireille; Laroche, M; Kaushik, Sadasivam.
Three isoproteic (crude protein content: 56%) diets with different fat levels (11%, 20%, and 26%) were fed to triplicate groups of triploid brown trout (initial average body weight of 1.5 kg), reared in seawater. At the end of 3 months of feeding, fish fed the high-fat (HF) diet were split into two groups: a triplicate group of fish received the low-fat diet and another triplicate group was kept unfed for a further 2-month period. Fish initially fed the low-fat diet during the first period were continued to be fed the same diet. Fish fed the medium-fat (MF) diet during period 1 were eliminated for period 2. At the end of each period, comparative whole body analyses, sensory and instrumental (texture and colour) analyses were made on fresh and smoked...
Tipo: Text
Palavras-chave: Texture; Colour; Sensory analyses; Starvation fat deposition; Dietary fat; Salmo trutta.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-377.pdf

Abrupt response of chemical weathering to Late Quaternary hydroclimate changes in northeast Africa
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bastian, Luc; Revel, Marie; Bayon, Germain; Dufour, Aurelie; Vigier, Nathalie.
Chemical weathering of silicate rocks on continents acts as a major sink for atmospheric carbon dioxide and has played an important role in the evolution of the Earth’s climate. However, the magnitude and the nature of the links between weathering and climate are still under debate. In particular, the timescale over which chemical weathering may respond to climate change is yet to be constrained at the continental scale. Here we reconstruct the relationships between rainfall and chemical weathering in northeast Africa for the last 32,000 years. Using lithium isotopes and other geochemical proxies in the clay-size fraction of a marine sediment core from the Eastern Mediterranean Sea, we show that chemical weathering in the Nile Basin fluctuated in parallel...
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00376/48697/49030.pdf

Filets à Céphalopodes. Méditerranée (Hors Corse). 2018. Observation des Marées au débarquement - OBSDEB
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public. Ces indicateurs intègrent...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00596/70791/69025.pdf

Recherches sur les réactions écophysiologiques d'agarophytes des côtes françaises
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Andriamampandry, A.; Asensi, A.; Delepine, R.; Dion, P.
Tipo: Text
Ano: 1979
URL: http://archimer.ifremer.fr/doc/00306/41692/40901.pdf

Vibriosis in sea bass
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Breuil, Gilles.
Tipo: Text
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00271/38240/36423.pdf

Recherche de marqueurs génétiques et évaluation de la variabilité génétique dans le cadre d'un programme de sélection de l'huître plate Ostrea edulis au parasite Bonamia ostrea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Launey, Sophie.
Dans le cadre du projet de relance de l'huître plate en France, projet mené par l'IFREMER et soutenu par les régions Bretagne et Poitou-Charentes, un programme de sélection pour la recherche de résistance au Bonamia ostreae, protozoaire parasite ayant entraîné une diminution importante des stocks cultivés, a été engagé à partir de 1985. Deux populations ont ainsi été sélectionnées et présentent maintenant des signes de résistance (ou de tolérance) accrue par rapport aux témoins du milieu naturel. Dans le cadre de ce programme, l'identification de marqueurs moléculaires a été initiée à partir d'octobre 1993 (Naciri et al, 1995). Mon sujet de thèse s'inscrit dans cette continuité. Mon travail s'articule en 2 parties: -  Dans un premier temps, la recherche de...
Tipo: Text
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00411/52206/52930.pdf

Synthèse des Pêcheries 2002 - Flotte mer du Nord-Manche-Atlantique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Berthou, Patrick; Daures, Fabienne; Merrien, Claude; Leblond, Emilie; Guyader, Olivier; Jezequel, Michele; Bermell, Sylvain.
The document synthesizes the data collected in 2002 and 2003 as part of the Fisheries monitoring system of Ifremer. It updates the description of the status in 2000 of the French fishing fleets operating in the North Sea, Channel and Atlantic (produced in 2002). The document is made of a series of leaflets. The first leaflet provides a global description of the overall population of fishing vessels. Information provided includes vessel and crew characteristics, spatial distribution of fishing activity and catch, and gears used. A description of fleets (sub-groups of vessels using the same gear combinations) is also provided at both national and regional levels. The following leaflets provide a detailed description of the fishing activity and economic...
Tipo: Text
Palavras-chave: France; Atlantique; Manche; Mer du Nord; Indicateurs économiques; Indicateurs d'activité; Engin; Métier; Flottille; Typologies; Pêche; France; Atlantic; Channel; North Sea; Economic indicators; Indicators of fishing activity; Gear; Metier; Fishing fleet; Typologies; Fishing sector.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/rapport-1226.pdf

Expédition antarctique française (1903-1905) commandée par le Dr Jean Charcot. Echinodermes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Koehler, R; Vaney, C.
M. le professeur Joubin a bien voulu me confier l'étude des Stellérides, Ophiures et Échinides recueillis dans l'Océan Antarctique par l'Expédition du Dr Charcot. La collection qui m'a été remise n'est pas très considérable, mais elle renferme des formes ayant un très grand intérêt, notamment parmi les Astéries qui m'ont offert non seulement plusieurs espèces nouvelles, mais encore un genre nouveau et même une famille nouvelle. Les Ophiures, assez pauvrement représentées, ont fourni une espèce nouvelle. Quant aux Echinides, ils appartiennent à trois espèces déjà connues. [OCR NON CONTRÔLE]
Tipo: Text
Ano: 1907
URL: http://archimer.ifremer.fr/doc/1907/publication-7427.pdf

Populations ichtyologiques de petits pélagiques. Sous-région marine Méditerranée occidentale. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Roos, David.
Tipo: Text
Palavras-chave: Méditerranée; Petits pélagiques; Espèces; Biocénose; Etat des stocks.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00331/44212/43781.pdf

A bio-economic analysis of long term changes in the production of French fishing fleets operating in the Bay of Biscay
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Steinmetz, Fabien; Thebaud, Olivier; Blanchard, Fabian; Le Floc H, Pascal; Bihel, J.
Selective fishing pressure on more highly valued marine living resources is one of the key factors proposed to explain changes occurring in fish communities and associated landings of commercial fisheries. The aim of this paper is to establish the nature of changes in the landings of French fishing fleets operating in the Bay of Biscay in the period 1973-2002, and whether these changes could be related to the relative economic attractiveness of different fish species. The analysis focuses on trends observed in the landings of all commercial fish species over the last three decades. It is based on data of annual quantities landed and ex-vessel prices compiled from official French landings records, and on bio-geographical descriptors of these species derived...
Tipo: Text
Palavras-chave: North Eastern Atlantic; Bay of Biscay; Long term changes; Bio economic analysis; French fisheries production.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-5926.pdf

VALDORA 2018. Etude de la perte de poids au jeûne sur deux classes de poids de dorades sauvages, Sparus aurata, maintenues en vivier
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Coves, Denis; Dutto, Gilbert; Geoffroy, Thibault.
L’étude a été menée sur deux classes de poids (260-450g et 460-980 g) de dorades sauvages maintenues à jeun en vivier pendant 40 jours après 3 semaines de captivité en cages sans alimentation. Au cours de cette phase de captivité les conditions de température ont progressivement évolué de 16.5 à 9.3 °C. Le taux de saturation en oxygène est resté supérieur à 95%. Les autres conditions de stockage ont été estimées non limitantes. Dans ce contexte, la perte de poids individuelle mesurée sur 2 lots de 30 individus de chaque classe de poids est de 3.7% pour les plus petits et de 3.3% pour les plus gros poissons.
Tipo: Text
Palavras-chave: Dorades royales sauvages; Sparus aurata; Dévalaison; Vivier; Perte de poids au jeûne; Valorisation.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00628/74039/73372.pdf

Bilan des phénomènes d'eaux colorées recensés pour l'année 1980
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lassus, Patrick.
INTRODUCTION- Sans être aussi fertile en eaux colorées qu'en 1978, l'année 1980 a vu un certain nombre de ces phénomènes se produire en divers points des côtes françaises. Nous avons essayé de les reprendre chronologiquement en précisant la source de l'information et le suivi éventuel en ce qui concerne le laboratoire "Effets Biologiques des Nuisances" de Nantes.
Tipo: Text
Ano: 1980
URL: http://archimer.ifremer.fr/doc/00119/23022/20853.pdf

Circulation and mixing in greater cook strait, new-zealand
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bowman, Mj; Kibblewhite, Ac; Murtagh, Ra; Chiswell, Sm; Sanderson, Bg.
Tipo: Text
Ano: 1983
URL: http://archimer.ifremer.fr/doc/00120/23125/20972.pdf

Observing the Local Emergence of the Southern Ocean Residual-Mean Circulation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sévellec, Florian; Naveira Garabato, A; Vic, Clement; Ducousso, N.
The role of mesoscale turbulence in maintaining the mean buoyancy structure and overturning circulation of the Southern Ocean is investigated through a 2‐year‐long, single‐mooring record of measurements in Drake Passage. The buoyancy budget of the area is successively assessed within the Eulerian and the Temporal‐Residual‐Mean frameworks. We find that a regime change occurs on timescales of 1 day to 100 days, characteristic of mesoscale dynamics, whereby the eddy‐induced turbulent horizontal advection balances the vertical buoyancy advection by the mean flow. We use these diagnostics to reconstruct the region's overturning circulation, which is found to entail an equatorward downwelling of Antarctic Intermediate and Bottom Waters and a poleward upwelling...
Tipo: Text
Palavras-chave: Southern Ocean; Meridional overturning; Mesoscale turbulence; Residual-mean circulation; Eulerian circulation; Mooring measurements.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00485/59655/62687.pdf

Quelques possibilités d'uilisation des sardines de grande taille
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Durand, Henri.
Depuis plusieurs années, les pêcheurs français capturent fréquemment des sardines de grande taille. Ces poissons, dont le poids individuel peut varier de 50 à 80 g, constituent parfois une portion importante des prises et ne trouvent pas preneur à l'état frais, la clientèle étant habituée à du poisson plus petit. L'industrie de la conserve n'utilise pas non plus cette matière première car l'emboîtage dans les formats traditionnels, de petite taille, entraîne une perte importante en déchets.
Tipo: Text
Ano: 1975
URL: http://archimer.ifremer.fr/doc/1975/publication-7117.pdf

How fast can the European eel (Anguilla anguilla) larvae cross the Atlantic Ocean?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bonhommeau, Sylvain; Blanke, Bruno; Treguier, Anne-marie; Grima, Nicolas; Rivot, Etienne; Vermard, Youen; Greiner, Eric; Le Pape, Olivier.
The migration duration of European eel (Anguilla anguilla) larvae (leptocephali) from the spawning areas in the Sargasso Sea to the European continental shelf remains highly controversial, with estimates varying from 6 months to more than 2 yr. We estimated the fastest migration period and the shortest distance travelled by eel larvae by simulating Lagrangian particles released in the Sargasso Sea and by simulating a range of larval behaviours (fixed-depth drift, vertical diurnal migration and active-depth selection to maximize current velocity). This enabled us to compute (i) a passive drift speed, and (ii) a hypothetic swimming speed needed for European eel larvae to cross the Atlantic in 6 months (i.e., the migration duration estimated from otolith...
Tipo: Text
Palavras-chave: Sargasso Sea; Migration duration; Leptocephali; Lagrangian modelling; Gulf Stream; Fractals; Anguilla.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6865.pdf

Résultats de la Surveillance de la Qualité du Milieu Marin Littoral. Département du Morbihan. Edition 2003
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer, laboratoire côtier de La Trinité-sur-Mer.
Tipo: Text
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00320/43102/42641.pdf

Enregistrement d'images vidéo géoréférencées par caméra remorquée dans les lagunes de Méditerranée. Expérimentations pilotes dans les étangs de Leucate (Juin 2004), de Thau et d'Ingril (avril 2005).
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Oheix, Jocelyne.
Dans le cadre du Réseau de Suivi Lagunaire, des images vidéo géoréférencées par caméra tractée ont été réalisées dans trois lagunes de Méditerranée : Thau, Leucate et Ingril avec la collaboration de l'équipe d'Ifremer/Toulon qui assure le développement technique de l'outil d'acquisition d'images dans le cadre du projet « Prisme ». L'objectif est de déterminer la faisabilité technique en lagune puis d'optimiser l'exploitation des données. Ce rapport présente les résultats de la mise en œuvre de la caméra tractée, du rejeu des images et de la représentation cartographique des données sous SIG. Ces expérimentations ont permis de définir une typologie d'utilisation de la vidéo tractée en lagune: - Recouvrement végétal, - Cartographie d'herbier, - Grand type de...
Tipo: Text
Palavras-chave: Lagunes littorales; Méditerranée; Vidéo sous-marine remorquée; Diagnostic; Macrophytes; Coastallagoon; Mediterranean; Towed submarine video; Diagnostic; Macrophytes.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00113/22400/20092.pdf

Eastern Mediterranean Sea circulation inferred from the conditions of S1 sapropel deposition
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tachikawa, K.; Vidal, L.; Cornuault, M.; Garcia, M.; Pothin, A.; Sonzogni, C.; Bard, E.; Menot, G.; Revel, M.
Holocene eastern Mediterranean Sea sediments contain an organic-rich sapropel S1 layer that was formed in oxygen-depleted waters. The spatial distribution of this layer revealed that during S1 deposition, deep waters were anoxic below a depth of 1800 m. However, whether this boundary permanently existed from the early to the mid-Holocene has not been examined yet. To answer this question, a multi-proxy approach was applied to a core retrieved close to the 1800 m boundary (at 1780 m). We measured the bulk sediment elemental composition, the stable isotopic composition of the planktonic foraminifer Globigerinoides ruber and the abundance of benthic foraminifera since the last deglaciation. The result indicates that authigenic U and Mo accumulation began...
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00291/40252/38634.pdf

Etude préliminaire de l'influence des élevages intensifs de poisson sur la salubrité des coquillages
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ISTPM Nantes.
I -Etude expérimentale de l'influence d'élevage intensif de truite arc en ciel sur la concentration en trois germes tests (CT, SF, CF) dans les huîtres. II -Etude bibliographique des germes hôtes normaux du milieu marin susceptibles d'être pathogènes pour l'homme. III -Etude bibliographique des conséquences possibles de l'usage d'antibiotiques à proximité des zones conchylicoles.
Tipo: Text
Ano: 1983
URL: http://archimer.ifremer.fr/doc/00060/17163/14665.pdf

Protocole pour la mesure de la densité des oeufs de poissons avec une colonne de densité. Note interne
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Petitgas, Pierre.
Protocol established during the 2005 and 2006 Pelgas campaigns, for anchovy eggs in the Bay of Biscay. The density column used is Coombs' (1981). Egg density varies according to surface hydrological conditions (Petitgas et al., 2006), which necessitates a routine measurement of egg density according to a set protocol.
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/rapport-6434.pdf

Interprétation des stries valvaires pour l'évaluation de la croissance de Ruditapes decussatus L.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Garcia, F.
Counting annual rings on shells, under favourable climatological conditions, usually permits determination of the age of many bivalves. But the application of this method becomes impossible when meteorological conditions are highly variable, as in the Bay of Fos. Annual winter rings are, in fact, often merged with other rings induced by important physiological processes like gametogenesis. When, therefore, annual rings and pseudoannual rings occur, it is impossible to distinguish between them. SEM offers a good solution to this problem, through the establishment of a scheme of interpretation. This method would also be suitable to identify the two main types of rings that could be confused in Ruditapes decussatus L. of the Bay of Fos, using optic microscopy...
Tipo: Text
Palavras-chave: EUROPEAN CARPET CLAM; GROWTH RINGS; VONBERTALANFFY GROWTH MODEL; OPTIC AND ELECTRONIC MICROSCOPY; MEDITERRANEAN SEA.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00100/21135/18755.pdf

Coherent heat patterns revealed by unsupervised classification of Argo temperature profiles in the North Atlantic Ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Maze, Guillaume; Mercier, Herle; Fablet, Ronan; Tandeo, Pierre; Radcenco, Manuel Lopez; Lenca, Philippe; Feucher, Charlene; Le Goff, Clement.
A quantitative understanding of the integrated ocean heat content depends on our ability to determine how heat is distributed in the ocean and what are the associated coherent patterns. This study demonstrates how this can be achieved using unsupervised classification of Argo temperature profiles. The classification method used is a Gaussian Mixture Model (GMM) that decomposes the Probability Density Function of a dataset into a weighted sum of Gaussian modes. It is determined that the North Atlantic Argo dataset of temperature profiles con- tains 8 groups of vertically coherent heat patterns, or classes. Each of the temperature profile classes reveals unique and physically coherent heat distributions along the vertical axis. A key result of this study is...
Tipo: Text
Palavras-chave: Heat content; Classification North Atlantic; Stratification; Water mass; Thermocline; Argo; Pattern.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00363/47431/47456.pdf

SSS from French Research Vessels: Inventory of thermo-salinometer delayed mode data - 2014
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gaillard, Fabienne; Diverres, Denis; Gouriou, Yves; Jacquin, Stephane.
The continuous data acquisition of thermo-salinometer data on board French Research Vessels was initiated in 1999. We present here the results of the delayed mode processing of the dataset collected by 5 high sea the Research vessels from 2001 to 2013.
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00251/36231/34791.pdf

Long-term exposure to near-future ocean acidification does not affect the expression of neurogenesis- and synaptic transmission-related genes in the olfactory bulb of European sea bass (Dicentrarchus labrax)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mazurais, David; Servili, Arianna; Le Bayon, Nicolas; Gislard, Sebastien; Madec, Lauriane; Zambonino-infante, Jose-luis.
The decrease in ocean pH that results from the increased concentration of dissolved carbon dioxide (CO2) is likely to influence many physiological functions in organisms. It has been shown in different fish species that ocean acidification (OA) mainly affects sensory systems, including olfaction. Impairment of olfactory function may be due to a dysfunction of the GABAergic system and to an alteration of neuronal plasticity in the whole brain and particularly in olfactory bulbs. Recent studies revealed that OA-driven effects on sensory systems are partly mediated by the regulation of the expression of genes involved in neurotransmission and neuronal development. However, these studies were performed in fish exposed to acidified waters for short periods, of...
Tipo: Text
Palavras-chave: Ocean acidification; Long-term exposure; Gene expression; Olfactory bulbs.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00606/71786/70315.pdf

Produits et services issus de la mer dans les domaines de santé et d'hygiène
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Millet, C.; De Monts, M. C.
Les produits naturels présentant une activité biologique et dérivés des mondes animal et végétal ont, de tout temps, reçu attention pour leur valeur bio-médicale. Dans cette démarche, qui remonte à la plus haute antiquité, l'empirisme, la constatation fortuite, la curiosité expérimentale et la systématisation du screening pharmacologique ont successivement jalonné la route du besoin, c'est-à-dire le maintien de la santé, en produisant d'abord des extraits ou isolats naturels, support des médications, puis le modèle original, point de départ à l'élaboration synthétique du composé bio-actif. Si le perfectionnement des techniques de chimie analytique permet aujourd'hui, à partir d'un modèle de base, la restructuration diversifiée des molécules, leur...
Tipo: Text
Ano: 1973
URL: http://archimer.ifremer.fr/doc/00105/21635/19215.pdf

La réplication de l'ADN chez l'euryarchaea Pyrococcus Abyssi : mise en place et dynamique du complexe
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rouillon, Christophe.
DNA replication occurs through a large protein complex assembly called replisome. An understanding of its structure and function requires its in vitro reassembly from individual subunits. In all living organisms, the elongation of a primed DNA template by DNA polymerase, with high processivity, requires the accessory protein DNA sliding clamp (PCNA) that is loaded onto DNA by the clamp loader (RF-C). Generally, the archaeal proteins involved in DNA replication are more similar to those of the higher organisms (Eukarya) rather than to those from Bacteria.  This study have focussed on the PCNA loading mechanism and on the DNA synthesis in the hyperthermophilic Euryarchaea Pyrococcus abyssi. To investigate the importance of some protein-protein and...
Tipo: Text
Palavras-chave: Pyrococcus; Archaea; DNA synthesis; Interaction; RP A; RF C; PCNA; DNA polymerase; DNA replication; Pyrococcus; Archée; Archaea; Synthese d'ADN; Interaction; RP A; RF C; PCNA; ADN polymerase; Replication de l'ADN.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/these-2461.pdf

Suivi de la reproduction de l'huître creuse Crassostrea gigas dans la partie nord du bassin charentais
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Arnaud, Christophe; Fillon, Alain.
The Charente-Maritime coast has, on its northern part, between the Charente estuary and the northern boundary of the department (Isle of Ré included), many sites which interest the oyster culture industry, especially as far as juvenile collection is concerned. The well-known centre of Fouras is one of them. To help the professionals, and for its own purposes, the Ifremer studies the periods of emission of cupped oyster larvae in order to let the oyster farmers know about the best collection times. Contractualized for the first time in 1996 between the SRC FIE-Centre Ouest and the Ifremer, this work has been carried out again in 1997 by the DEL coastal laboratory of La Rochelle, following the renewal of this contract. This report presents the different...
Tipo: Text
Palavras-chave: Captage; Marennes Oléron; Crassostrea gigas; Larves; Reproduction.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/1998/rapport-6568.PDF

North Pacific Gyre Oscillation links ocean climate and ecosystem change
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Di Lorenzo, E.; Schneider, N.; Cobb, K. M.; Franks, P. J. S.; Chhak, K.; Miller, A. J.; Mcwilliams, J. C.; Bograd, S. J.; Arango, H.; Curchitser, E.; Powell, T. M.; Riviere, Pascal.
Decadal fluctuations in salinity, nutrients, chlorophyll, a variety of zooplankton taxa, and fish stocks in the Northeast Pacific are often poorly correlated with the most widely-used index of large- scale climate variability in the region - the Pacific Decadal Oscillation (PDO). We define a new pattern of climate change, the North Pacific Gyre Oscillation (NPGO) and show that its variability is significantly correlated with previously unexplained fluctuations of salinity, nutrients and chlorophyll. Fluctuations in the NPGO are driven by regional and basin-scale variations in wind-driven upwelling and horizontal advection - the fundamental processes controlling salinity and nutrient concentrations. Nutrient fluctuations drive concomitant changes in...
Tipo: Text
Palavras-chave: North Pacific Ocean climate; Salinity and nutrient variability; Upwelling and ecosystems.
Ano: 2008
URL: https://archimer.ifremer.fr/doc/00483/59492/62351.pdf

Résultats de la campagne CINECA - CHARCOT I (22 janvier - 15 février 1971)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thiriot, Alain.
La campagne Cineca-Charcot 1 a été organisée par le Centre Océanologique de Bretagne en collaboration avec des chercheurs de plusieurs laboratoires français et étrangers à la demande du Centre National pour l'Exploitation des Océans, comme première participation française au programme international CINECA "Cooperative Investigations of the Northern part of the Eastern CentraL AtLantic". Cette région est le siège de phénomènes saisonniers de remontée d'eau subsuperficielle riche en sels nutritifs entraînant une intensification locale des processus de production aux différents niveaux de la chaîne alimentaire. Les chercheurs du Centre Océanologique de Bretagne s'intéressent essentiellement aux premiers échelons animaux du domaine pélagique et ont fait appel...
Tipo: Text
Ano: 1973
URL: http://archimer.ifremer.fr/doc/00306/41757/40968.pdf

Seasonal cycle and interannual variability of rainfall at hydrological scales. The West African monsoon in a Sudanese climate
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Lay, Matthieu; Galle, Sylvie.
West African rainfall is characterized by a strong variability, both at decadal and interannual scales. In order to quantify the hydrological impacts of such a variability, analysis of rainfall patterns at fine scales is highly essential. This diagnostic study aims to characterize the Sudanese rainfall regime at hydrological scales, using a raingauge data set collected on the upper Oueme River catchment (Benin) between 1950 and 2002. A long-term drought is observed during the 1970s and 1980s, as in the Sahel. However, the interannual variability remains significant in the Sudanese region. The study of the seasonal cycle, based on the distinction between the oceanic and continental monsoon regimes, shows that the majority of rainfall changes occur in the...
Tipo: Text
Palavras-chave: Catchment; Sudanese climate; Rainfall deficit; Monsoon; Precipitation; West Africa.
Ano: 2005
URL: https://archimer.ifremer.fr/doc/00203/31460/30115.pdf

Coring induced sediment fabrics at IODP Expedition 347 Sites M0061 and M0062 identified by anisotropy of magnetic susceptibility (AMS): criteria for accepting palaeomagnetic data
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Snowball, I; Almqvist, B; Lougheed, B C; Wiers, S; Obrochta, S; Herrero-bervera, E.
Anisotropy of magnetic susceptibility data obtained from discrete sub-samples recovered from two Integrated Ocean Drilling Program sites (Expedition 347 sites M0061 and M0062 in the Baltic Sea) by an Advanced Piston Corer are compared to results obtained on sub-samples recovered by replicate 6 m long Kullenberg piston cores. Characteristic natural remanence directions were obtained from the total of 1097 sub-samples using principal component analyses. The three principal anisotropy axes of sub-samples taken from Advanced Piston Core liners align to the sub-sample axes, with the maximum axis (K1) parallel to the split core surfaces, possibly caused by outwards relaxation of the core-liners after splitting. A second anomalous anisotropy fabric is...
Tipo: Text
Palavras-chave: Magnetic fabrics and anisotropy; Palaeomagnetic secular variation; Palaeomagnetism.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00481/59233/61937.pdf

Expression, tissue localization and synergy of antimicrobial peptides and proteins in the immune response of the oyster Crassostrea gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Schmitt, Paulina; De Lorgeril, Julien; Gueguen, Yannick; Destoumieux-garzon, Delphine; Bachere, Evelyne.
Diverse families of antimicrobial peptides and proteins have been described in oysters. We investigated here how antimicrobials are involved in the immune response against a pathogenic strain of Vibrio splendidus. Oyster antimicrobials were shown to display a wide variety of expression profiles in hemocyte populations and tissues. Oyster defensins are constitutively expressed in specific tissues such as mantle (Cg-Defm) or hemocytes (Cg-Defhs), while Cg-BPI is inducible and Cg-Prp appears down-regulated in hemocytes upon infection. The migratory behavior of hemocytes that express the different antimicrobials was found to be involved in the oyster response to a pathogenic Vibrio infection. Indeed, it contributes to colocalize several antimicrobials that...
Tipo: Text
Palavras-chave: Pacific oyster; Bivalve mollusk; Innate immunity; Bactericidal/permeability-increasing protein; Proline-rich peptide; Defensin; Vibrio.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00093/20382/18267.pdf

L'araignée de mer, Maia Squinado L. sur le littoral de Bretagne
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: De Kergariou, Gabriel.
A traditional activity on the Breton coast, spider crab fishing has grown more important over the past few years, not due to an increase of the number of catches but to a significant decrease in the number of lobsters and crayfishes brought to the market, following the closing of some fishing areas (Anglo-Norman Isles, Ireland, England) and the exhaustion of others.
Tipo: Text
Ano: 1971
URL: http://archimer.ifremer.fr/doc/1971/publication-6664.pdf

Structure of the upper water column in the northwest North Atlantic: Modern versus last glacial maximum conditions
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: De Vernal, A; Hillaire-marcel, C; Peltier, Wr; Weaver, Aj.
During the Last Glacial Maximum, the northwestern North Atlantic constituted a major conduit for Labrador and Greenland ice sheet meltwaters. Vertical density gradients in its upper water masses have been reconstructed by combining information from transfer functions based on dinocysts and from oxygen isotope measurements (delta(18)O) in planktonic foraminifera. Transfer functions yield temperature and salinity and thus potential density (sigma(theta)) for the warmest (August) and coldest (February) months in the photic zone. The delta(18)O values in different size fractions of epipelagic (Globigerina bulloides) and mesopelagic (Neogloboquadrina pachyderma left-coiled (Np1)) foraminifera allow us to assess sigma(theta) gradients through the pycnocline...
Tipo: Text
Palavras-chave: Last Glacial Maximum; LGM; North Atlantic; Salinity; Density; Pycnocline.
Ano: 2002
URL: https://archimer.ifremer.fr/doc/00223/33405/31861.pdf

The effects of dietary marine protein hydrolysates on the development of sea bass larvae, Dicentrarchus labrax, and associated microbiota
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Delcroix, Jeremy; Gatesoupe, F.j.; Desbruyeres, Elisabeth; Huelvan, Christine; Le Delliou, Herve; Le Gall, Marie-madeleine; Quazuguel, Patrick; Mazurais, David; Zambonino-infante, Jose-luis.
Protein hydrolysate is an essential component of dry starter diets for fish larvae, as promoting healthy development. Peptides are also suitable substrates for many intestinal microbes. Five experimental diets were compared to a control diet (CONT) supplemented with a commercial fish protein hydrolysate. Each diet contained one marine protein hydrolysate, which differed by the proportion of di- and tri-peptides, and by raw materials. Two diets (HYD4 and HYD5) stimulated larval growth compared with CONT. Two other diets (HYD1 and HYD2) yielded inferior growth. HYD1 was detrimental for survival, which was associated with an up-regulation of genes involved in inflammation and antioxidative responses, while the gene coding for osteocalcin was down-regulated in...
Tipo: Text
Palavras-chave: Compound diets; Denaturing gradient gel electrophoresis; Digestive enzymes; Gene expression; Gut maturation; Peptides.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00197/30865/29268.pdf

Elevage de copépodes calanoïdes. Biologie et dynamique des populations : premiers résultats
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Person-le Ruyet, Jeannine.
Four species of planktonic Calanoid Copepods, Acartia clausi, Centropages typicus, C. hamatus and Temora longicornis, were cultured during one year, at 20°, with the green algae Tetraselmis suecica. The generation time and reproductive rate are investigated, the best results are obtaincd with C. hamatus and A. clausi : 50 and 60 adults per female, and per cycle (20 and 21 days). [NOT CONTROLLED OCR]
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1975
URL: http://archimer.ifremer.fr/doc/1975/publication-5448.pdf

NEREIS (Nutrient Export Role on Eutrophication. Indicators and model Scenarios) - Rapport Seine-Aval
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Garnier, Josette; Le Gendre, Romain; Passy, Paul; Paris, Francois; Billen, Gilles; Callens, Julie; Cugier, Philippe; Tronquart, Olivier; Romero, Estela; Riou, Philippe.
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00092/20336/17982.pdf

Two deep-living rhodaliids (Cnidaria, Siphonophora) from the Mid-Atlantic Ridge
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mapstone, Gillian M.; Corbari, Laure; Menot, Lenaick.
Rhodaliids are a semi-benthic family of 14 physonect siphonophore species found in all oceans, except the Mediterranean and Arctic. They inhabit species-specific depth ranges in isolated locations and records are mostly sparse. Here, the first ever observations of rhodaliids from the Mid-Atlantic Ridge are given, from three images of two putative species. They come from depths of 3482 and 3667–3670 metres, on the Mid-Atlantic Ridge (MAR) at 23°N and 26°N, near two hydrothermal vents. Rhodaliids are very delicate animals and extremely hard to sample, particularly from such great depths, and the only comparable deep-living species so far described is the Galapagos Dandelion (Thermopalia taraxaca) from 2480–2938 metres on the Galapagos Rift and East Pacific...
Tipo: Text
Palavras-chave: Deep-sea; Mid-Atlantic Ridge; Rhodaliid; Siphonophore.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00361/47207/51395.pdf

Water ratio effect on the proteins hydrolysis tongue sole by-products (Cynoglossus senegalensis)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sylla, K. S. B.; Musabyemariya, B.; Berge, Jean-pascal; Seydi, Mg.
In this study the effectiveness of four different water ratio to hydrolyze sole by-products by using Protamex® were compared. Average proteins yields and degree of hydrolysis (DH %) of different hydrolysates were measured, and their peptide profiles were analysed by using gel filtration chromatography. It was found that by changing the hydrolysis conditions it was possible to produce hydrolysates with the same proportion of proteins (60%) and very different in peptide composition (from 294 to 13700 Da).
Tipo: Text
Palavras-chave: Coproduits; Eau; Hydrolyse enzymatique; Protéines; By-products; Water; Enzymatic hydrolysis; Proteins.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00015/12620/9505.pdf

Instability of a two-step Rankine vortex in a reduced gravity QG model
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Perrot, Xavier; Carton, Xavier.
We investigate the stability of a steplike Rankine vortex in a one-active-layer, reduced gravity, quasi-geostrophic model. After calculating the linear stability with a normal mode analysis, the singular modes are determined as a function of the vortex shape to investigate short-time stability. Finally we determine the position of the critical layer and show its influence when it lies inside the vortex.
Tipo: Text
Palavras-chave: Vortex dynamics; Instability; Normal/Singular modes; Critical layer.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00202/31360/31183.pdf

Mortalité estivale de l'huître creuse Crassostrea gigas dans le bassin de Marennes-Oléron
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Couty, Angélique.
The Japan oyster: Crassostrea gigas have been imported on the french coasts in the seventies and from this time it adapted to this environment. Since, it became the main oyster producted in France. But ,since twenty years C. gigas presents an anormaly and important mortality eah year in the period of summer. The syndrome known as summer mortality, appears particulary in mid-june. This mortality can affected 50% of the culture. Many studies have brought elements in the comprehension of the condition of apparition of this mortalilities. Temperature seems to play an important rule with reproductive maturation. But also, the deep ofwater could be associated to this mass mortality. The study began in march 2003 and characterize more precisely the summer...
Tipo: Text
Palavras-chave: Crassostrea gigas; Mortalité estivale; Croissance; Maturation; Environnement; Crassostrea gigas; Summer mortality; Growth; Maturation; Environment.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00306/41767/40980.pdf

Two decades of oligotrophication: Evidence for a phytoplankton community shift in the coastal lagoon of Thau (Mediterranean Sea, France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Derolez, Valerie; Soudant, Dominique; Malet, Nathalie; Chiantella, Claude; Richard, Marion; Abadie, Eric; Aliaume, Catherine; Bec, Beatrice.
Mediterranean costal lagoons have been exposed to anthropic eutrophication for decades. Thau lagoon is one of the largest among them and provides many ecosystem services including shellfish farming. Considerable efforts were made between the 1970s and the late 2000s to improve the wastewater treatment systems in the lagoon watershed. A decrease in nutrient inputs to Thau lagoon was subsequently observed, evidence for the start of a recovery process in Thau lagoon, following oligotrophication. This decrease has significant consequences for ecosystem communities, above all primary producers. In our study, we characterised and quantified long-term changes by analysing long monitoring time-series (1998-2016) of phytoplankton biomass, abundance and composition...
Tipo: Text
Palavras-chave: Eutrophication; Oligotrophication; Nutrients; Recovery; Phytoplankton community shift; Mediterranean coastal lagoon.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00629/74063/73514.pdf

Surveillance écologique et halieutique. Site de Gravelines. Novembre 1991 - Octobre 1992
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Pendant la période novembre 1991 - octobre 1992 la puissance de fonctionnement de la centrale a varié de 3 à 6 tranches de 900 MW, les débits d'eau de refroidissement des condenseurs ont varié de 160 à 240 m3/s. Le réchauffement moyen annuel mesuré dans le canal de rejet est 9.3 ° C. La chloration de 0.8 mg/l est appliquée au circuit de refroidissement quand la température au canal d'entrée est supérieure à 10°C.
Tipo: Text
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00005/11605/8242.pdf

Small-scale fishers’ perception of the implementation of the EU Landing Obligation regulation in the outermost region of the Azores
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fauconnet, Laurence; Frangoudes, Katia; Morato, Telmo; Afonso, Pedro; Pita, Cristina.
The archipelago of the Azores (mid-north Atlantic Ocean) is an outermost region of the European Union (EU) in which small-scale fisheries are a strong component of the local economy. Bottom longlining and handlining are the most important Azorean fisheries in landing values, fishing vessels and fishers. Despite their high selectivity and low discards, these fisheries can be highly impacted by the implementation of the Landing Obligation (LO). Semi-structured interviews were conducted with Azorean small-scale fishers to document their perceptions about discards and the LO, and to ascertain the mitigation measures they already implement or could further implement to avoid unwanted catch. Results suggest that most fishers strongly oppose the LO, perceiving it...
Tipo: Text
Palavras-chave: EU landing obligation; Small-scale Fishers; Outermost region; Discard avoidance; Hooks-and-lines; Deep-sea fishery.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00509/62104/67586.pdf

A proudman-function expansion of the m2 tide in the mediterranean-sea from satellite altimetry and coastal gauges
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sanchez, Bv; Ray, Rd; Cartwright, De.
An empirical model has been derived for the semidiurnal principal lunar tide M2 in the Mediterranean Sea, excluding the Aegean Sea. The work is primarily an exercise in combining satellite altimeter data with tide-gauge data, through the use of specially constructed spatial basis functions. The tide-gauge data consist of M2 harmonic constants previously derived at 43 chosen coastal locations. The altimeter data consist of approximately two years of Geosat data in the form of collinear differences of sea-surface heights, corrected for orbit error by adjusting long sequences of global data. The tide is expressed as an expansion in Proudman functions - numerically constructed, orthogonal eigenfunctions of the velocity potential. The most important mode is...
Tipo: Text
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00100/21166/18785.pdf

Quantification des microflores dénitrifiantes associées aux eaux souterraines d'un bassin versant agricole (Kerharo, Finistère)-Première approche
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Les eaux souterraines du bassin versant du Kerharo présentent une stratification. La première tranche d'eau, d'épaisseur variable mais ne dépassant pas 40 m, est caractérisée par de fortes teneurs en nitrates et en oxygène dissous. Elle est séparée de la couche sousjacente par un front d'oxydo-réduction. Cette dernière contient très peu de nitrates mais présente des concentrations conséquentes en fer, manganèse, ammonium, sulfates, voire en l'hydrogène sulfuré (H2S), indicateur de conditions fortement réductrices (Rapport d'avancement "Bassins versants et transmission des pollutions au littoral", 1996). La mise en évidence de bactéries dénitrifiantes lors d'un essai préliminaire suggère une dénitrification active dans ces eaux. Cette étude fait suite à ces...
Tipo: Text
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00104/21497/19078.pdf

Preliminary-study of uranium and thorium redistribution in callichirus-laurae burrows, gulf of aqaba (red-sea)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Whitehead, Ne; Devaugelas, J; Parsi, P; Navarro, Mc.
Tipo: Text
Ano: 1988
URL: http://archimer.ifremer.fr/doc/00107/21866/19457.pdf

La lettre du Cnexo n° 6 Mars Avril 1981
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Claude, Benoit.
Le CNEXO a publié demièrement les actes du Colloque international tenu au Centre Océanologique de Bretagne à Brest en novembre 1979 et consacré aux conséquences de la pollution provoquée par l'échouement du pétrolier «AMOCO-CADIZ» en mars 1978. Ce colloque organisé par le Ministère de l'Environnement et du Cadre de Vie et par le CNEXO faisait le point de la première phase du programme d'étude des effets sur la flore et la faune marines des déversements de pétrole dûs à cet accident survenu 20 mois auparavant, dans la nuit du 16 au 17 mars 1978. [OCR NON CONTRÔLE]
Tipo: Text
Ano: 1981
URL: http://archimer.ifremer.fr/doc/1981/publication-4771.pdf

Amelioration de la forme et de la qualite de l'huitre Crassostrea gigas Thunberg dans les claires de Marennes-Oleron.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Deslous-paoli, Jean-marc; Zanette, Yvan; Heral, Maurice; Masse, Henri; Garnier, Jacqueline.
The breeding of Pacific oysters Crassostra gigas, in non tidal ponds, before commercialization, brings about an improvement of the shell and of the quantity and quality of the tissues. In fact, the Berthome's indice (1978) moves from 1.36 in June to 0.68 December, and the density of the shell increases in the same time from 1.79 to 1.98. On the other hand, the percentage of tissues in the oyster is 12.4% at the end of gametogenesis and more than 9% at the end of breeding. The dry tissues are composed of 10.3 of ash, 40.3% of proteins, 12.6% of lipids and 9% of carbohydrate. 95% of the carbohydrate are glycogen. The resulting energetic values are measured to 5.10 cal-mg super(-1) of dry tissues ash free.
Tipo: Text
Palavras-chave: Crassostrea gigas; Tissues; Biochemical composition; Shells; Growth; Oyster culture.
Ano: 1981
URL: http://archimer.ifremer.fr/doc/1981/publication-1892.pdf

Essai d'interprétation morphologique et géologique de la pente continentale à l'ouest de la péninsule Ibérique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Berthois, Léopold; Brenot, Roger; Ailloud, P.
Soundings in the west of the Iberian Peninsula aimed at extending the morphological identification of the continental slope all the way to the Cap Saint-Vincent (Portugal) started in 1956 from the Porcupine bank (west of Ireland).Works started during the cruises of the oceanographic research vessels of the Scientific and Technical Institute of Marine Fisheries: the "Président Théodore-Tissier" and the "Thalassa", as they were on their way to the Mediterranean Sea or other regions south of the Strait of Gibraltar.These first results were then completed during different research expeditions on fishing, off the Portuguese coast.This discontinuity in the operations, spread out over many years, resulted in all the navigation and soundings being conducted by...
Tipo: Text
Ano: 1965
URL: http://archimer.ifremer.fr/doc/1965/publication-4003.pdf

Spatial and temporal variability of the pico- and nanophytoplankton and bacterioplankton in a deep Polynesian atoll lagoon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thomas, Y.; Garen, Pierre; Courties, C.; Charpy, L.
Spatial and temporal scales of variability in phyto- and bacterioplankton abundance were investigated in a deep atoll lagoon (Ahe, French Polynesia), Ahe Lagoon showed a classical phytoplankton composition, but its picophytoplankton (Prochlorococcus, Synechococcus and picoeukaryotes) concentrations are higher than the mean for Polynesian atoll lagoons. Phyto- and bacterioplankton descriptors were highly variable, with mean CVs of &gt;20% in most cases: day night, day-to-day, vertical, lagoonal and seasonal. Phytoplankton biomass, which was estimated by in vivo fluorescence, was higher in the deep layer than in the upper layer. This pattern was detected on a day night scale, showing transitory vertical gradients, and through long-term events that were...
Tipo: Text
Palavras-chave: Flow cytometry; Picophytoplankton; Nanophytoplankton; Bacterioplankton; Vertical distribution; Day-to-day dynamics; Large-scale heterogeneity; Deep atoll lagoon; French Polynesia.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00003/11425/7963.pdf

Nutrient conditions in the subpolar North Atlantic during the last glacial period reconstructed from foraminifera-bound nitrogen isotopes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Straub, M.; Tremblay, M. M.; Sigman, D. M.; Studer, A. S.; Ren, H.; Toggweiler, J. R.; Haug, G. H.
Surface nitrate concentration is a potentially useful diagnostic in reconstructing the past circulation of high-latitude North Atlantic waters. Moreover, nutrient consumption in the North Atlantic surface impacts the atmospheric concentration of carbon dioxide. To reconstruct nutrient conditions in the subpolar North Atlantic region during the last ice age, a record of foraminifera-bound delta N-15 was measured in Neogloboquadrina pachyderma (sin.) from core V28-73 south of Iceland (57.2 degrees N, 20.9 degrees W). Foraminifera-bound delta N-15 is up to 2 parts per thousand lower during the last ice age than during the Holocene, suggesting as much as similar to 25% less complete nitrate consumption during the former. This is consistent with stronger light...
Tipo: Text
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00262/37308/35721.pdf

Sur la corrosion des fers-blancs utilisés dans la fabrication des boîtes de conserves
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gire, G.
La variété des produits conservés, la complexité de leur nature du point de vue chimique, l'action propre des ingrédients qui les accompagnent, rendent la question de la corrosion des boîtes de conserves extrêmement difficile.  De nombreux spécialistes, particulièrement en Amérique, ont examiné de très près les différentes sortes de corrosion que présentent les boites de conserves et se sont surtout attachés à celles qui provoquent, à bref délai, la perforation des boîtes. Leur but était de pouvoir établir des spécifications quant aux fers-blancs utilisés à la fabrication des boîtes de conserves. Cet objectif particulier semble avoir par trop limité leurs observations au seul aspect du fer-blanc et, si les corrosions observées ont été méticuleusement...
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1930
URL: http://archimer.ifremer.fr/doc/1930/publication-5872.pdf

Le 'Mussel-Watch' français: résultats acquis sur les moules et les huîtres du littoral de la France. Exploitation de ces résultats dans le cas particulier de l'estuaire de la Seine
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Claisse, Didier; Simon, Serge.
Depuis 1979 le Réseau National d'Observation de la qualité du milieu marin (RNO) pratique une surveillance trimestrielle des teneurs en contaminants métalliques et organiques dans les moules et les huîtres du littoral français. Cette communication résume les méthodes et les actions d'assurance de qualité utilisées. Les résultats sont présentés de manière synthétique et les points remarquables sont mis en évidence. Une tentative de relation est faite entre les concentrations dans la Seine faisant l'objet d'un suivi régulier et les résultats du 'Mussel-Watch' exposés précédemment.
Tipo: Text
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00017/12780/9714.pdf

The planktonic stages of the salmon louse ( Lepeophtheirus salmonis) are tolerant of end-of-century p CO2 concentrations
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thompson, Cameron R.s.; Fields, David M.; Bjelland, Reidun M.; Chan, Vera Bin San; Durif, Caroline M.f.; Mount, Andrew; Runge, Jeffrey A.; Shema, Steven D.; Skiftesvik, Anne Berit; Browman, Howard I.
The copepod Lepeophtheirus salmonis is an obligate ectoparasite of salmonids. Salmon lice are major pests in salmon aquaculture and due to its economic impact Lepeoph- theirus salmonis is one of the most well studied species of marine parasite. However, there is limited understanding of how increased concentration of pCO2 associated with ocean acidification will impact host-parasite relationships. We investigated the effects of increased pCO2 on growth and metabolic rates in the planktonic stages, rearing L. salmonis from eggs to 12 days post hatch copepodids under three treatment levels: Control (416 matm), Mid (747 matm), and High (942 matm). The pCO2 treatment had a significant effect on oxygen consumption rate with the High treatment animals exhibiting...
Tipo: Text
Palavras-chave: Salmon lice; Copepod; Ocean acidification; Parasite; Energetics; Metabolism; Growth; Lipid; Lepeophtheirus salmonis; Aquaculture.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00588/69998/67911.pdf

When riverine dissolved organic matter (DOM) meets labile DOM in coastal waters: changes in bacterial community activity and composition
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Blanchet, Marine; Pringault, Olivier; Panagiotopoulos, Christos; Lefevre, Dominique; Charriere, Bruno; Ghiglione, Jean-francois; Fernandez, Camila; Aparicio, Fran L.; Marrase, Celia; Catala, Philippe; Oriol, Louise; Caparros, Jocelyne; Joux, Fabien.
Heterotrophic bacterial communities in marine environments are exposed to a heterogeneous mixture of dissolved organic compounds with different bioreactivity that may control both their activity and composition. The coastal environment is an example of a mixing area where recalcitrant allochthonous organic matter from rivers can encounter labile organic matter from marine phytoplanktonic blooms. The objective of this study was to explore the effects of mixed qualities of dissolved organic matter (DOM) on bacterial community activity (BCA) and bacterial community composition (BCC) and to test for a priming effect when DOM sources are added in combination. Coastal marine bacterial communities were incubated separately with a mixture of amino acids and with...
Tipo: Text
Palavras-chave: Dissolved organic matter; Biodegradation; Coastal waters; Bacterial community composition; Priming effect.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00625/73737/74701.pdf

Oceanic mercury concentrations on both sides of the Strait of Gibraltar decreased between 1989 and 2012
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cossa, Daniel; Knoery, Joel; Boye, Marie; Marusczak, Nicolas; Thomas, Bastien; Courau, Philippe; Sprovieri, Francesca.
Mercury (Hg) is a toxic metal that threatens the health of aquatic ecosystems and fish consumers. Its natural cycle has been deeply perturbed by Anthropogenic Hg emissions have deeply perturbed its natural cycle, especially since the start of the Industrial Revolution circa 1850 CE. Anthropogenic Hg emissions from North America and Europe have decreased by a factor of two in the last decades following the implementation of strict regulations. The response of North Atlantic Ocean and Mediterranean waters to this decrease remains poorly documented by field observations. A comparison of results obtained between 1989 and 2012 shows a significant decrease of Hg concentrations in waters on both sides of the Strait of Gibraltar. West of Gibraltar, the Hg decrease...
Tipo: Text
Palavras-chave: Mercury; Mediterranean Sea; Atlantic Ocean; Gibraltar.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00593/70540/68705.pdf

Stability of an isolated pancake vortex in continuously stratified-rotating fluids
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Yim, Eunok; Billant, Paul; Menesguen, Claire.
This paper investigates the stability of an axisymmetric pancake vortex with Gaussian angular velocity in radial and vertical directions in a continuously stratified-rotating fluid. The different instabilities are determined as a function of the Rossby number Ro, Froude number Fh, Reynolds number Re and aspect ratio α. Centrifugal instability is not significantly different from the case of a columnar vortex due to its short-wavelength nature: it is dominant when the absolute Rossby number |Ro| is large and is stabilized for small and moderate |Ro| when the generalized Rayleigh discriminant is positive everywhere. The Gent–McWilliams instability, also known as internal instability, is then dominant for the azimuthal wavenumber m=1 when the Burger number...
Tipo: Text
Palavras-chave: Geophysical and geological flows; Vortex flows; Vortex instability.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00347/45817/46635.pdf

Spatial Variations in Archaeal Lipids of Surface Water and Core-Top Sediments in the South China Sea and Their Implications for Paleoclimate Studies
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Wei, Yuli; Wang, Jinxiang; Liu, Jie; Dong, Liang; Li, Li; Wang, Hui; Wang, Peng; Zhao, Meixun; Zhang, Chuanlun L.
The South China Sea (SCS) is the largest marginal sea of the western Pacific Ocean, yet little is known about archaeal distributions and TEX86-based temperatures in this unique oceanic setting. Here we report findings of abundances in both core lipids (CL) and intact polar lipids (IPL) of Archaea from surface water (CL only) and core-top sediments from different regions of the SCS. TEX86-derived temperatures were also calculated for these samples. The surface water had extremely low abundances of CL (average of 0.05 +/- 0.13 ng/liter; n = 75), with higher values present in regions where upwelling is known to occur. The core-top sediments had CL values of 0.1 to 0.9 mu g/g, which are on the low end of CL concentrations reported for other marine sediments...
Tipo: Text
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00497/60851/64257.pdf

Observer, Analyser et Gérer la variabilité de la reproduction et du recrutement de l’huître creuse en France : Le Réseau Velyger. Rapport annuel 2011
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pouvreau, Stephane; Bernard, Ismael; Le Souchu, Pierrick; Queau, Isabelle; Talarmain, Eric; Auby, Isabelle; Maurer, Daniele; Barbier, Claire; Tournaire, Marie-pierre; D'Amico, Florence; Rumebe, Myriam; Neaud-masson, Nadine; Bedier, Edouard; Fleury, Elodie; Martin, Anne-genevieve; Claude, Serge; Langlade, Aime; Bouget, Jean-francois; Collin, Karine; Fortune, Mireille; Hitier, Benoist; Robert, Stephane; Guilpain, Patrice; Grizon, James; Seugnet, Jean-luc; Guesdon, Stephane; Quemener, Loic; Repecaud, Michel; Barbot, Stephane; Guillemot, Anne; Nonnotte, Lidwine; Duros, Wenceslas; Bonnat, Armel; Tarot, Stephane; Mille, Dominique; Geay, Amelie; Bouquet, Anne-lise.
La conchyliculture, et principalement l’élevage de l’huître creuse, Crassostrea gigas, constitue la principale activité aquacole française. Cette activité repose, en grande partie, sur le recrutement naturel de l’espèce qui assure 70% des besoins en jeunes huîtres (naissain) : cette activité de collecte s’appelle le captage. Les deux principaux centres de captage en France sont les bassins d’Arcachon et de Marennes-Oléron. Or, depuis une dizaine d'années, sur le bassin d'Arcachon, le captage devient très variable: à des années de captage nul (par exemple les années 2002, 2005, 2007) ou faible (2009, 2010, 2011) succèdent des années excellentes voire pléthoriques (les années 2003, 2006, 2008). A Marennes-Oléron, cette variabilité existe, même si elle est...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00135/24649/22682.pdf

Protein hydrolysates from yeast and pig blood as alternative raw materials in microdiets for gilthead sea bream (Sparus aurata) larvae
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gisbert, Enric; Skalli, Ali; Fernandez, Ignacio; Kotzamanis, Yannis; Zambonino, Jose Luiz; Fabregat, Rogelio.
In this study, we have evaluated the incorporation of two types of protein hydrolysates at 9 and 12% levels of inclusion, one from yeast (Saccharomyces cerevisiae, YPH) and another one from pig blood (PBPH), in microdiets for gilthead sea bream (Sparus aurora) larvae, and compared these results to a microdiet containing fish protein hydrolysate and another group only fed with enriched live prey (rotifers and Artemia). The trial consisted in substituting up to 75% (wt/wt) the enriched Artemia with the experimental microdiets from 15 to 40 days post-hatch, whereas larvae were exclusively fed on microdiets from 40 to 55 dph. Protein hydrolysates used in the present study were obtained from different raw materials (yeast, pig blood and fish protein...
Tipo: Text
Palavras-chave: Digestive enzymes; Larvae; Gilthead sea bream; Protein hydrolysate; Skeletal deformities; Sparus aurata.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00085/19584/17467.pdf

Application à la zone au large du Finistère d'une méthode d'estimation statistique des courants de houle au voisinage du fond
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cavanie, Alain.
The spectral energy distribution of sea waves is supplied four times a day by the French Meteorological Office's DsAs model using the pressure distribution over the atlantic as input. The surface-motion spectrum furnished by the model may then be used to estimate the local current spectrum near the sea bed. The present study is based on four years (1970-1974) of DSAs data for the so-called Brittany point (47"30 N. 5"W). The data correlates reasonably well with observations made from ships in the region lying between 40 - 50 N and O - 10 W (Figure 1) . . . Plotted on Weibull paper in Figure 2 are the cumulative probability values of U as calculated from the DSAs data (U is the mean of the upper third of maximum current values at a depth of 100 m). The...
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1975
URL: http://archimer.ifremer.fr/doc/1975/publication-5089.pdf

Traité de zoologie
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Claus, C.
La Zoologie a subi dans ces quarante dernières années des transformations profondes. Avec Linné et ses successeurs elle était restée une science purement descriptive. Au commencement de ce siècle, sous la puissante impulsion de Cuvier, elle vit s'ouvrir des horizons nouveaux. Ce grand naturaliste montra, en effet, que tout essai durable de classification devait être basé sur les études anatomiques, et qu'il ne suffisait plus, comme autrefois, de se borner à décrire les formes extérieures de l'animal: c'est en observant avec soin jusqu'aux plus petites particularités de la structure; en combinant les notions ainsi acquises sur l'ensemble des appareils organiques, qu'il arriva à saisir les véritables rapports des êtres et à les grouper suivant les affinités...
Tipo: Text
Ano: 1878
URL: http://archimer.ifremer.fr/doc/00034/14497/11800.pdf

Combining ecosystem indicators and life cycle assessment for environmental assessment of demersal trawling in Tunisia
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Abdou, Khaled; Le Loc'H, Francois; Gascuel, Didier; Romdhane, Mohamed Salah; Aubin, Joel; Ben Rais Lasram, Frida.
Purpose The present study assesses environmental performance of seafood production by demersal trawling in Tunisia (Gulf of Gabes) in order to analyze the contribution of each production stage to environmental impacts and to understand drivers of the impacts using life cycle assessment (LCA). Then a set of ecosystem quality indicators were determined using an ecosystem modeling tool, Ecopath with Ecosim (EwE), and were combined with LCA to increase the relevance of both tools' assessments when applied to fisheries. Methods The approach consisted of conducting LCA and calculating ecosystem indicators to provide a complete assessment of trawling's environmental impacts and the ecosystem characteristics associated with seafood production. The functional unit...
Tipo: Text
Palavras-chave: Life cycle assessment; Fisheries; Ecosystem modeling; Ecopath with Ecosim; Ecospace; Demersal trawling; Environmental impacts; Gulf of Gabes.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00609/72148/70895.pdf

Open-air treatment of wastewater from land-based marine fish farms in extensive and intensive systems: current technology and future perspectives
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hussenot, Jerome; Lefebvre, Sébastien; Brossard, Nicolas.
Marine land-based fish farms located in coastal wetlands (salt-pond zones, lagoon banks, etc.), whether extensive or intensive, send farm effluents directly to the sea or after short periods of stocking in retention reservoirs. The aims of our investigation have been to compare the efficiency of current and potential water treatment procedures in open-air. Wastewater retention ponds in commercial farms (Atlantic coasts of France) are efficient in removing up to 1 metric ton of particulate material (dry weight) per hectare and per day (faeces and unconsumed feed), but are inefficient in reducing dissolved wastes, both organic (urea, amino acids, protein) and inorganic (total ammonia nitrogen, phosphates). Forthcoming outdoor technology to treat these forms...
Tipo: Text
Palavras-chave: Traitement de l'eau; Effluent; Décantation; Sédimentation; Écumage; Microalgue; Huître; Water treatment; Effluent; Aquaculture; Sedimentation; Foam fractionation; Microalgae; Oyster.
Ano: 1998
URL: https://archimer.ifremer.fr/doc/1998/publication-873.pdf

Patch structure of benthic populations on an intertidal sandflat
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Schneider, Dc.
Tipo: Text
Ano: 1987
URL: http://archimer.ifremer.fr/doc/00108/21900/19491.pdf

La pisciculture en eau de mer prend le large !
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Peyronnet, Jean-paul.
Tipo: Text
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00382/49356/49764.pdf

The integrated biomarker response revisited: optimization to avoid misuse
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Devin, S.; Burgeot, Thierry; Giamberini, L.; Minguez, L.; Pain-devin, S.
The growing need to evaluate the quality of aquatic ecosystems led to the development of numerous monitoring tools. Among them, the development of biomarker-based procedures, that combine precocity and relevance, is recommended. However, multi-biomarker approaches are often hard to interpret, and produce results that are not easy to integrate in the environmental policies framework. Integrative index have been developed, and one of the most used is the integrated biomarker response (IBR). However, an analysis of available literature demonstrated that the IBR suffers from a frequent misuse and a bias in its calculation. Then, we propose here a new calculation method based on both a more simple formula and a permutation procedure. Together, these...
Tipo: Text
Palavras-chave: Biomarkers; Integrated Index; Environmental risk assessment; Pollution; Water Framework Directive.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00176/28712/27276.pdf

Deep diving service submarines
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Freitas, A.
Service submarines have been developed for support duties in offshore operations in deep waters. Three submarine concepts have been designed for water depths ranging from 400 to 1500 m. The operation philosophy is to use an autonomous manned submarine as a carrier for components, tools and work modules and as a base for IMR operations on subsea installations. The design principles are similar to that of the Space Shuttle incorporating a payload bay, energy supply and a closed environment for the crew and operators. The operation profile of an offshore submarine demands capabilities above those of naval submarines: deep diving, long endurance underwater, dynamic positioning. New technology had to be developed: air-independent energy system, regenerative...
Tipo: Text
Palavras-chave: Dynamic positioning; Marine technology; Diving; Offshore equipment; Offshore operations; Underwater inspection.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/1990/acte-1165.pdf

Salinity influences disease-induced mortality of the oyster Crassostrea gigas and infectivity of the ostreid herpesvirus 1 (OsHV-1)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fuhrmann, Marine; Petton, Bruno; Quillien, Virgile; Faury, Nicole; Morga, Benjamin; Pernet, Fabrice.
Mortality of young Pacific oysters Crassostrea gigas associated with the ostreid herpesvirus 1 (OsHV-1) is occurring worldwide. Here, we examined for the first time the effect of salinity on OsHV-1 transmission and disease-related mortality of C. gigas, as well as salinity-related effects on the pathogen itself. To obtain donors for OsHV-1 transmission, we transferred laboratory-raised oysters to an estuary during a disease outbreak and then back to the laboratory. Oysters that tested OsHV-1 positive were placed in seawater tanks (35‰, 21°C). Water from these tanks was used to infect naïve oysters in 2 experimental setups: (1) oysters acclimated or non-acclimated to a salinity of 10, 15, 25 and 35‰ and (2) oysters acclimated to a salinity of 25‰; the...
Tipo: Text
Palavras-chave: Bivalve; Herpesviridae; Infection; Disease transmission; Risk analysis.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00350/46100/45781.pdf

Cold storage of Pacific oysters out of water: biometry, intervalval water and sensory assessment
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Buzin, Florence; Baudon, Violaine; Cardinal, Mireille; Barille, Laurent; Haure, Joel.
Due to the important economic activity of oyster production in France, microalgal toxic events represent a significant constraint for shellfish farmers who face closures of bivalve production-sites. The frequency of closures of 3 weeks or less represents half of the total closures along the French coasts. Cold storage could be a simple and affordable solution for temporary and short-term storage before commercialisation. A stock of marketable Pacific oyster Crassostrea gigas was therefore stored during 22 days in non-immersed conditions at 3 degrees C with 100% humidity. At the end of the experiment, the oyster mortality rate remained at a low level of less than 3.5%. The sensory attributes, odour, appearance, texture and flavour, did not show significant...
Tipo: Text
Palavras-chave: Quality control; Refrigeration; Sensory evaluation; Shelf life; Shellfish.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00041/15245/12840.pdf

Ecologie et dynamique des populations de crevettes palaemonetes varians dans un écosystème lagunaire (domaine de Certes, Arcachon, France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Beaudelin, P.; Charles-dominique, E.; Do Chi, T.
The fish reserves in the Arcachon basin are a semi-natural lagoon com­plex which are suitable for the analysis of various population dynamics problems. We will consider here the population of the shrimp Palacmonetea varians, an impor­tant link in the food chain between primary production, the production of meiofau­na and that of exploitable species, e. g. bass, eel. Estimations of biomass and abundance are extremely important when one studies the quantitative production of macrofauna in a lagoon system. The methodology utilized (net traps, tagging methods and stock assessment by simple or multiple capture and recapture techniques) is particulary suited to the conditions of the milieu. Our results confirm the im­portant role played by shrimp in the...
Tipo: Text
Ano: 1979
URL: http://archimer.ifremer.fr/doc/00306/41683/40892.pdf

The ocean-continent transition in the uniform lithospheric stretching model : role of partial melting in the mantle
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Foucher, Jean-paul; Le Pichon, Xavier; Sibuet, Jean-claude.
The role of partial melting in the uniform lithospheric stretching model of continental margin formation is explored.  It is shown that the transition from continental lithosphere stretching to oceanic accretion is most probably controlled by the production of a significant amount of partial melting in the asthenosphere immediately below the lithosphere, which requires stretching factors larger than 3.  It is also shown that, at stretching factors exceeding 2, the law of subsidence is significantly changed by the presence of partial melt in the underlying asthenosphere.  The implications for the existence of deep continental margin basins on thinned continental crusts are examined. The Armorican deep continental margin basin is taken as an example. [NOT...
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1981
URL: http://archimer.ifremer.fr/doc/1981/publication-5375.pdf

Agriculture, conchyliculture et circulation des eaux de surface : état actuel des recherches
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chevallier, Claude; Masson, Daniel.
La qualité des eaux de surface constitue périodiquement un sujet de controverse et de polémiques entre professionnels agricoles et conchylicoles charentais. Le débat reste centré sur la valorisation agricole des zones de marais littoraux. La création croissante d'îlots de culture drainés, souvent à proximité immédiate des zones conchylicoles, suscite l'inquiétude quant à la qualité des eaux d'aval. Il nous a paru nécessaire d'établir un état succinct des connaissances en la matière afin d'éviter l'usage d'arguments parfois irrationnels et de favoriser le dialogue entre les partenaires ; mais il nous paraît tout aussi important de montrer que la qualité des eaux de surface, question essentielle pour l'aménagement régional dépasse le seul cadre des marais :...
Tipo: Text
Palavras-chave: Conchyliculture; Circulation des eaux; Effluent d'élevage; Charente-Maritime; Agriculture; Eau; Engrais.
Ano: 1988
URL: http://archimer.ifremer.fr/doc/00015/12664/9553.pdf

Partially supervised oil-slick detection by SAR imagery using kernel expansion
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mercier, Grégoire; Ardhuin, Fanny.
Spaceborne synthetic aperture radar (SAR) is well adapted to detect ocean pollution independently from daily or weather conditions. In fact, oil slicks have a specific impact on ocean wave spectra. Initial wave spectra may be characterized by three kinds of waves, namely big, medium, and small, which correspond physically to gravity and gravity-capillary waves. The increase of viscosity, due to the presence of oil damps gravity-capillary waves. This induces not only a damping of the backscattering to the sensor but also a damping of the energy of the wave spectra. Thus, local segmentation of wave spectra may be achieved by the segmentation of a multiscale decomposition of the original SAR image. In this paper, a semisupervised oil-slick detection is...
Tipo: Text
Palavras-chave: Water pollution; Synthetic aperture radar; Sea surface; Satellite applications; Oil spill; Image analysis.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1948.pdf

Detection of free gas and gas hydrate based on 3D seismic data and cone penetration testing: An example from the Nigerian Continental Slope
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sultan, Nabil; Voisset, Michel; Marsset, Tania; Vernant, Antoine-mathieu; Cauquil, E; Colliat, J; Curinier, V.
We present a new method to characterize free gas, gas hydrates and carbonate concretions occurrence which are considered as high-risk factors for sub-sea developments in the Niger delta. This method is based on the combination of 3D seismic data to the geotechnical site characterizations using piezocone CPTU tests (Cone Penetration Test with additional measurement of the pore water pressure). A special processing of the 3D seismic data has enabled the determination of the interval compressional velocity. Using the effective-medium theory, velocity anomalies (negative and positive) within the first 15 m were translated in gas hydrate and free gas distribution. The calibration of the P wave velocity anomalies was done thanks to in-situ geotechnical testing...
Tipo: Text
Palavras-chave: Piezocone; Niger delta; Gas hydrate; Free gas; Effective medium theory.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2610.pdf

Iberian Margin sea surface temperature during MIS 15 to 9 (580-300 ka): Glacial suborbital variability versus interglacial stability
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rodrigues, T.; Voelker, A. H. L.; Grimalt, J. O.; Abrantes, F.; Naughton, F.
Past sea surface water conditions of the western Iberian Margin were reconstructed based on biomarker analyses of a marine deep sea core MD03-2699 from the Estremadura Spur north off Lisbon, providing new insights into orbital and suborbital-scale climate variability between marine isotope stage (MIS) 15 to MIS 9 (580 to 300 ka). We use biomarker-based proxy records such as the alkenone unsaturated index to estimate sea surface temperature (SST), the total alkenone concentration to reconstruct phytoplankton productivity, and terrestrial biomarkers to evaluate the continental input. The results extend the existing biomarker record, namely the SST for the Iberian Margin, back to the sixth climatic cycle (580 ka). A general trend of stable interglacials...
Tipo: Text
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00228/33879/32246.pdf

Photosynthèse et nutrition carbonée chez ULVA SP
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Piriou, Jean-yves; Duval, Valérie.
Laboratory experiments have been conducted in order to examine the grouth of ULVA SP. Results show that growth suddenly stops at a precise moment. Collectively, the results of simultaneously analysis of culture media constituents demonstrate that several components may alter the growth process of UIva sp. Based on the culture experiments, we argue that the gowth responses of UIva sp. are unaffected by pH or oxygen concentrations, but field plants of ULVA sp. are libely to be ponctually limited in growth by carbon (DIC) depletion, together with nitrogen limitation and pigments degradation.
Tipo: Text
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00037/14824/12140.pdf

Avis de l'Ifremer pour la création d'une zone de cantonnement au large de Brescou, commune d'Agde
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bourjea, Jerome.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00585/69665/67539.pdf

Rôle du plancton dans le cycle biogéochimique du cadmium et du vanadium en baie de Seine orientale : premiers résultats
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Miramand, P; Bentley, D; Guary, Jc; Brylinski, Jm.
Cd and V were analyzed in planktonic species (zooplankton and diatoms), in flocks and in total seston (suspended materials) collected at eleven stations for seven sampling periods in the eastern area of the bay of Seine. Cd concentrations measured in planktonic species of the bay of Seine are identical to those measured in other oceanic areas, but V concentrations are generally higher. In the conditions of sampling, the role of both planktonic species and flocks in the horizontal fluxes of Cd and V in the bay of Seine appears not to be important (Cd) or negligible (V) compared to non-living materials (tripton). Nevertheless, this study should be continued in periods of diatom blooms. Flocks which present high Cd and V concentration probably have an...
Tipo: Text
Palavras-chave: PLANKTON; CD; V; BAY OF SEINE.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00100/21143/18762.pdf

Nocivité de l'emploi des explosifs dans la pêche de la sardine
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Maurin, Cl; Duclerc, J.
La pêche à la sardine des côtes françaises de la Méditerranée, naguère négligeable, apporte désormais une contribution importante à l'économie du pays. Elle connaît même certaines difficultés pour commercialiser sa production, lorsque celle-ci atteint comme ce fut le cas en 1966-67 un tonnage voisin de 20 000 tonnes.  On pourrait donc croire que ses problèmes, pour ce qui est de la technique et du rendement, sont résolus et que seul se pose celui de l'écoulement. Or, il n'en est rien et c'est au moment même où elle pourrait sembler pléthorique qu'elle court le risque de péricliter et de retomber aux étiages d'avant 1960, ceci en raison d'une pratique désastreuse, la pêche aux explosifs, plus ou moins importée de pays voisins dont on sait pourtant qu'elle a...
Tipo: Text
Ano: 1967
URL: http://archimer.ifremer.fr/doc/1967/publication-7273.pdf

The RCR and ATP/O indices can give contradictory messages about mitochondrial efficiency
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Salin, Karine; Villasevil, Eugenia M.; Anderson, Graeme J.; Selman, Colin; Chinopoulos, Christos; Metcalfe, Neil B.
Mitochondrial efficiency is typically taken to represent an animal’s capacity to convert its resources into ATP. However, the term mitochondrial efficiency, as currently used in the literature, can be calculated as either the respiratory control ratio, RCR (ratio of mitochondrial respiration supporting ATP synthesis to that required to offset the proton leak) or as the amount of ATP generated per unit of oxygen consumed, ATP/O ratio. The question of how flexibility in mitochondrial energy properties (i.e. in rates of respiration to support ATP synthesis and offset proton leak, and in the rate of ATP synthesis) affects these indices of mitochondrial efficiency has tended to be overlooked. Furthermore, little is known of whether the RCR and ATP/O ratio vary...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00449/56014/57529.pdf

Characterization of biofilm extracts from two marine bacteria
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Passerini, Delphine; Fecamp, Florian; Marchand, Laetitia; Kolypczuk, Laetitia; Bonnetot, Sandrine; Sinquin, Corinne; Verrez-bagnis, Veronique; Hervio Heath, Dominique; Colliec Jouault, Sylvia; Delbarre Ladrat, Christine.
In the marine environment, biofilm formation is an important lifestyle for microorganisms. A biofilm is comprised of cells embedded in an extracellular matrix that holds them close together and keeps the biofilm attached to the colonized surface. This predominant lifestyle and its main regulation pathway, namely quorum-sensing (QS), have been shown to induce specific bioactive metabolites. In this study, we investigated the biofilm formation by two marine bacteria belonging to the Vibrio species to discover potentially innovative bioactive compounds. We proposed a protocol to isolate biofilm extracts, to analyze their biochemical composition, and to compare them to planktonic cell extracts. Cells were grown attached to a plastic surface; extracts were...
Tipo: Text
Palavras-chave: Vibrio; Biofilm; Polysaccharide; Quorum-sensing; Activity.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00592/70381/68461.pdf

Filets maillants de fond. Martinique. 2017. Observation des Marées au débarquement - OBSDEB.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: IFREMER. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public. Ces indicateurs intègrent...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00492/60381/63814.pdf

Débits fluviaux. Sous-région marine Méditerranée occidentale. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dubois, Aurélie.
Tipo: Text
Palavras-chave: Méditerranée; Débits fluviaux; Evolution; Le Rhône.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00330/44109/43680.pdf

Statistique des pêches maritimes - Années 1945, 1946, 1947
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Tipo: Text
Ano: 1949
URL: http://archimer.ifremer.fr/doc/00163/27382/25611.pdf

Report of the Workshop on Methods for Stakeholder Involvement in Gear Development (WKMSIGD), 22-24 May 2018, BSAC and ICES HQ, Copenhagen
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ICES.
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00586/69781/67672.pdf

Temps de renouvellement des masses d’eau des Pertuis Charentais. Note méthodologique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Moine, Olivier.
The dynamics of water renewal in semi closed ecosystems takes an essential importance in the qualitative characterization of the environment, and its impact on the exploited resource. The research of synthetic spatialized variables representing this dynamics brought to apply a method of estimation of the time of local renewal in Charentais Sounds. Various authors developed a methodology (Braunschweig, 2003). The used methodology is detailed here, with objective to document the cartographic aspects under development, to enlighten their broadcasting
Tipo: Text
Palavras-chave: Modélisation hydrodynamique; Temps de renouvellement; Pertuis Charentais; Hydrodynamic modellig; Time of renewal; Charentais Sounds.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00430/54179/55520.pdf

Etudes écologiques liées au développement du Port du Verdon. Tome I - Inventaire et structure de la flottille de pêche en 1977
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bregeon, L.; Chandor, M.; Njock, J. C.
Dans l e cadre d 'un programme d' études visant à définir un état de référence de l' estuaire et de l'embouchure de la Gironde, il a été confié au Centre Régional d'Etudes Biologiques et Sociales ( C.R.E.B.S. ) la réalisation d 'une étude comportant l'étude de l'exploitation actuelle des ressources marines dans l'estuaire de la Gironde, c' est à dire entre le bec d'Ambès et la ligne Pointe de Grave - Royan et dans la zone littorale limitée à l'est par la ligne Pointe de Grave - Royan, au nord par le parallèle de Chassiron (Ile d' Oléron), au sud par le parallèle de Montalivet et à l' ouest par l'isobathe (- 25 rn); - la surveillance de la  contamination chimique des coquillages (huîtres) vivant sur les gisements naturels situés sur les deux rives de la...
Tipo: Text
Ano: 1978
URL: http://archimer.ifremer.fr/doc/00436/54787/56241.pdf

Estimating Symbiont Abundances and Gill Surface Areas in Specimens of the Hydrothermal Vent Mussel Bathymodiolus puteoserpentis Maintained in Pressure Vessels
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Duperron, Sebastien; Quiles, Adrien; Szafranski, Kamil M.; Leger, Nelly; Shillito, Bruce.
The hydrothermal vent mussel Bathymodiolus puteoserpentis hosts gill-associated sulfur- and methane-oxidizing bacteria which sustain host nutrition and allow it to reach high densities at various sites along the northern Mid-Atlantic Ridge. Previous studies have demonstrated that in similar dual symbioses, relative abundances of each bacterial type could change following variations in symbiont substrate availabilities. In this study, pressurized recovery and incubations in pressure vessels were used to test whether B. puteoserpentis symbionts displayed similar behavior in the presence of symbiont substrates. The relative abundances of both types of symbionts were analyzed using fluorescence in situ hybridization (FISH) and group-specific gene copy numbers...
Tipo: Text
Palavras-chave: Symbiosis; In vivo experiments; Pressurized recovery; Bivalve; Mid-Atlantic Ridge.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00484/59533/62525.pdf

New species of the xenophyophore genus Aschemonella (Rhizaria: Foraminifera) from areas of the abyssal eastern Pacific licensed for polymetallic nodule exploration
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gooday, Andrew J.; Holzmann, Maria; Caulle, Clemence; Goineau, Aurelie; Jones, Daniel Ob; Kamenskaya, Olga; Simon-lledo, Erik; Weber, Alexandra A. -t.; Pawlowski, Jan.
We describe Aschemonella monile Gooday and Holzmann sp. nov. from the Clarion-Clipperton Zone (CCZ, abyssal eastern equatorial Pacific), a region characterized by commercially significant concentrations of polymetallic nodules. The new species is the most abundant xenophyophore (giant agglutinated foraminifera) in our main sampling area (12-14 degrees N; 116 degrees 30'-117 degrees 26'W). Additional specimens originate from the central CCZ, and from a third area, similar to 900 km NW of the main area, where A. monile numerically dominates the megabenthos in photographic surveys of the seafloor (average densities 1.54 individuals/m(2); peak densities &gt; 3 individuals/m(2)). Aschemonella monile is much larger (&gt;= 7 cm in length) than previously...
Tipo: Text
Palavras-chave: Abyssal megafauna; Biodiversity; Clarion-Clipperton Zone; Deep-sea benthos; Deep-sea mining; Protist.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00435/54663/56099.pdf

Paralytic shellfish poison accumulation yields and feeding time activity in the Pacific oyster (Crassostrea gigas) and king scallop (Pecten maximus)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bougrier, Serge; Lassus, Patrick; Bardouil, Michele; Masselin, Pierre; Truquet, Philippe.
Pacific oysters and king scallops placed individually in a recirculating flume were fed for 2 weeks with a constant concentration (120 cell ml(-1)) of a toxic strain of Alexandrium minutum. Fluorescence at the outlet of each experimental unit was measured continuously, and biodeposits were recovered twice daily to evaluate feeding time activity (FTA) and rates of organic filtration (OFR), ingestion (OIR) and organic absorption (OAR). Ion-pairing high performance liquid chromatography (IP-HPLC) was performed concurrently to quantify paralytic phycotoxins both (i) individually in shellfish at the end of the contamination period and (ii) in A. minutum cultures to estimate cellular toxin concentration. These data allowed comparison of the actual tissue toxin...
Tipo: Text
Palavras-chave: Alexandrium minutum; Crassostrea gigas; Feeding activity; Paralytic shellfish poisoning.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/publication-576.pdf

SUBSAINTES’17. Cruise Report. Coseismic ruptures &amp; tecto-volcanic interactions at the French Antilles Arc between Les Saintes and Dominica
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Escartin, Javier.
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00403/51444/52014.pdf

Qualité du milieu marin littoral. Bulletin de la surveillance 2017. Laboratoire Environnement Ressources de Bretagne Occidentale. Département du Finistère
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Bec, Claude; Boulben, Sylviane; Demeule, Carole; Derrien, Amelie; Doner, Anne; Duval, Audrey; Lebrun, Luc; Terre Terrillon, Aouregan.
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00464/57590/59768.pdf

Psettodidae, Citharidae et Paralichthyidae de Madagascar
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Quero, Jean-claude; Mauge, A.
Two specimens of Psettodidae : Psettodes erumei, two of Citharidae : Paracitharus macrolepis and six of Paralichthyidae : 4 Pseudorhombus arsius and 2 Taeniopsetta ocellata were collected from waters of Malagasy Rep.. T. ocellata is new for the ichthyological fauna of Malagasy waters. NOT CONTROLLED OCR
Tipo: Text
Palavras-chave: Taxonomy; Malagasy Rep; ISW; Taeniopsetta ocelata; Pseudorhombus arsius; Paracitharus macrolepis; Psettodes erumei; Psettodidae; Paralichthyidae; Citharidae.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/publication-3785.pdf

Etude des peuplements d’invertébrés benthiques de substrats meubles et des herbiers à Zostera marina du secteur Ouest-Cotentin dans le cadre du contrôle de surveillance de la directive Cadre sur l’Eau (2000/60/CE)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Latry, Lise; Fournier, Jérôme.
La Directive Cadre sur l’Eau (DCE) (2000/60/CE) prévoit d’atteindre le « bon état » écologique des masses d’eau côtières européennes d’ici 2015 au moyen de différents réseaux de surveillance. Le Réseau Benthique Rebent-DCE-Manche, mis en place par l’IFREMER, est chargé du suivi faunistique et floristique des habitats des fonds côtiers. Les macroinvertébrés benthiques, de par leur sédentarité, sont de bons intégrateurs et indicateurs de plusieurs fluctuations environnementales. L’étude des espèces sensibles à ces fluctuations permet d’identifier et de quantifier certaines des pressions d’origine anthropique qui s’exercent sur le milieu. Les herbiers à Zostera marina, indicateur DCE « angiosperme », permettent également d’évaluer un certain état écologique...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00452/56356/57955.pdf

Subsidence of the gulf of Lions continental margin (France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bache, François; Olivet, Jean-louis; Rabineau, Marina; Gorini, C; Baztan, Juan; Aslanian, Daniel.
The Gulf of Lion margin has been created by an Oligo-Aquitanian rifting followed by oceanic accretion in the Provencal basin during the Burdigalian. Two main periods have been detailed in this study. The Messinian event represents a clear marker (between 7 and 5.3 Ma) within the history of the basin. The study of sedimentary geometries on the margin and in the deep basin gave new elements for the understanding of the messinian crisis: • The first element is the identification of a thick detritic series (up to 1000 m) at the transition between the sub aerially eroded shelf and the slope. The base of this series corresponds to the very first event of the Messinian crisis. • The second important element is the identification of a thick stratum of lower...
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/acte-4687.pdf

Rejets de cabillaud observés sur les chalutiers opérant en Manche Est - mer du Nord et en mer Celtique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dube, Benoit; Pawlowski, Lionel; Biseau, Alain.
L’étude présentée est une analyse des informations recueillies en 2011 dans le cadre du programme Obsmer en Manche Est (Division CIEM VIId) et mer du Nord (Zone IV), ainsi qu’en mer Celtique sur les chalutiers de fond. Elle complète le précédent document (juin 2011) qui présentait l’analyse des observations des captures 2009-2010 en mer du Nord – Manche Est. Ce document étend l’analyse à la pêcherie française de mer Celtique.
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00110/22172/19828.pdf

Les glissements sous-marins de la pente continentale niçoise et la rupture de câbles en mer Ligure (Méditerranée occidentale).
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gennesseaux, Maurice; Mauffret, Alain; Pautot, Guy.
On October 16, 1979, off the Bay of Nice, a turbidity current, generated by large submarine landslides.  was channelled by submarine valleys down to the bathyal plain of the Ligurian Sea where it seriously damaged two submarine cables, at about 80 and 110 km from its starting-point.  The measured mean speeds were 17 km/h, above the first cable, and 7 km/h between the two cables, but the speed may have reached 40 km/h on the upper slope. [NOT CONTROLLED OCR]
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1980
URL: http://archimer.ifremer.fr/doc/1980/publication-5314.pdf

Identifying flood deposits in lake sediments: Changing frequencies and potential links to long-term climate change
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Storen, Eivind Wilhelm.
This thesis consists of an introduction and three individual papers that investigate the possibility for identifying the sedimentary imprint of catchment processes in lake sediments, emphasising on extreme events and in particular those deposited by river floods. Three individual lake sediment basins in southern Norway have been studied and changes in the frequency of such events are reconstructed for the last c. 10,000 years. In Paper I, the sediments of the glacier-fed Lake Russvatnet in eastern Jotunheimen (61′ N 8′ E) were studied. The record comprises a combination of glacier-derived material produced by the glacier Blackwellbreen and also several episodic processes in the catchment area such as floods and debris flows. In order to distinguish late-...
Tipo: Text
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00505/61701/65669.pdf

Dissolved and particulate metals (Fe, Zn, Cu, Cd, Pb) in two habitats from an active hydrothermal field on the EPR at 13 degrees N
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sarradin, Pierre-marie; Lannuzel, D; Waeles, M; Crassous, Philippe; Le Bris, Nadine; Caprais, Jean-claude; Fouquet, Yves; Fabri, Marie-claire; Riso, R.
The distribution of Fe, Cu, Zn, Pb, Cd between the dissolved (&lt;2 mu m) and the particulate (&gt;2 mu m) fractions was measured after in-situ filtration in two hydrothermal habitats. The total metal concentration ranges exhibit a clear enrichment compared with the seawater concentration, accounting for the hydrothermal input for all the metals considered. Iron is the predominant metal (5-50 mu M) followed by Zn and Cu. Cd and Pb are present at the nM level. At the scale studied, the behavior of temperature, pH and dissolved iron is semi-conservative whereas the other dissolved and particulate metals are characterized by non-conservative patterns. The metal enrichment of the &gt;2 mu m fraction results from the settlement and accumulation of particulate...
Tipo: Text
Palavras-chave: Hydrothermal fauna; Habitats; Particulate; Dissolved; Metals.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-3830.pdf

Reliability of standard seawater as an electrical-conductivity standard
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Poisson, A; Dauphinee, T; Ross, Ck; Culkin, F.
Tipo: Text
Ano: 1978
URL: http://archimer.ifremer.fr/doc/00123/23397/21224.pdf

Evaluation de l’impact de la drague à moules sur la sole commune et son renouvellement dans les zones de nourricerie
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vigneau, Joel; Biseau, Alain; Cochard, Marie-laure; Vermard, Youen.
Expression de la demande : La demande d’avis de la part de la Direction Interrégionale de la mer Manche Est – mer du Nord (DIRM-MMN) datant du 25 février 2015 et référencée 25/2015 est présentée en annexe. La demande fait référence à un arrêté d’interdiction faite à une liste d’engins traînants de fond dans les zones de nourricerie en Baie de Seine afin de favoriser la reconstitution des stocks de sole. La liste des engins prohibés (annexe III de l’arrêté) inclut les dragues remorquées par bateau, code DRB selon la nomenclature FAO. Le comité régional des pêches de Basse-Normandie (CRPBN) s’inquiète de cette interdiction, arguant du fait que la zone protégée en baie de Seine occidentale englobe une partie des gisements mouliers de Grandcamp et Ravenoville,...
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00255/36625/79503.pdf

Résultats de la surveillance du Benthos. Région Bretagne. Suivi stationnel des sables sublittoraux pour l'année 2010. Édition 2011
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gentil, Franck.
Tipo: Text
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00173/28466/26803.pdf

Séparation fractionnée du phytoplancton et estimation de l'assimilation autotrophe et hétérotrophe de 14 C
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chretiennot-dinet, Mj; Vacelet, E.
Tipo: Text
Ano: 1978
URL: http://archimer.ifremer.fr/doc/00123/23409/21236.pdf

Méthodes d'examen bactériologique de l'eau de mer et des coquillages - Essais comparatifs
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boury, Maurice; Borde, J.
Nous nous proposons de donner des indications concises sur les résultats des recherches de bactériologie conchylicole poursuivies depuis trois ans dans les laboratoires de l'Institut des Pêches.
Tipo: Text
Ano: 1957
URL: http://archimer.ifremer.fr/doc/1957/publication-7217.pdf

The Great Barrier Reef: Vulnerabilities and solutions in the face of ocean acidification
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pendleton, Linwood; Hoegh-guldberg, Ove; Albright, Rebecca; Kaup, Anne; Marshall, Paul; Marshall, Nadine; Fletcher, Steve; Haraldsson, Gunnar; Hansson, Lina.
As living carbonate-based structures, coral reefs are highly vulnerable to ocean acidification. The Great Barrier Reef (GBR) is the largest continuous coral reef system in the world. Its economic, social, and icon assets are valued at AU$56 billion (Deloitte Access Economics, 2017), owing to its vast biodiversity and services related to commercial and recreational fisheries, shoreline protection, and reef-related tourism and recreation. Ocean acidification poses a significant risk to these ecological and socioeconomic services, threatening not only the structural foundation of the GBR but the livelihoods of reef-dependent sectors of society. To assess the vulnerabilities of the GBR to ocean acidification, we review the characteristics of the GBR and the...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00506/61766/65744.pdf

Géologie sous-marine du canyon de Toulon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mascle, Jean.
In a previous article published in the "cahiers Océanographiques" XXII, 1 (January 1970), pp. 25-32, I described the broad lines of subactual sedimentation in and around the canyon of Toulon. This data had been collected during a drilling cruise conducted in October 1967. Out of the 41 successful drillings, 17 had enabled the collection of rock samples representing, either the Maures basement in which the canyon of Toulon is cut, or more recent deposits, episodes of the eustatic or tectonic variations of the water level over the Quaternary and maybe the Pliocene era.
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1971
URL: http://archimer.ifremer.fr/doc/1971/publication-4890.pdf

Présence des oeufs et larves de thonidés en fonction des conditions hydrologiques en Méditerranée
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Piccinetti, C.
Observations on the physico-chemical conditions of the environment done at the same time, allowed to precise the conditions required for the development of the planktonic stage of three tuna species, Thunnus thynnus, Thunnus alalunga, Auxis rochei.
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1978
URL: http://archimer.ifremer.fr/doc/1978/publication-6023.pdf

A numerical model for ocean ultra-low frequency noise: Wave-generated acoustic-gravity and Rayleigh modes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ardhuin, Fabrice; Lavanant, Thibaut; Obrebski, Mathias; Marie, Louis; Royer, Jean-yves; D'Eu, Jean-francois; Howe, Bruce M.; Lukas, Roger; Aucan, Jerome.
The generation of ultra-low frequency acoustic noise (0.1 to 1 Hz) by the nonlinear interaction of ocean surface gravity waves is well established. More controversial are the quantitative theories that attempt to predict the recorded noise levels and their variability. Here a single theoretical framework is used to predict the noise level associated with propagating pseudo-Rayleigh modes and evanescent acoustic-gravity modes. The latter are dominant only within 200 m from the sea surface, in shallow or deep water. At depths larger than 500 m, the comparison of a numerical noise model with hydrophone records from two open-ocean sites near Hawaii and the Kerguelen islands reveal: (a) Deep ocean acoustic noise at frequencies 0.1 to 1 Hz is consistent with the...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00176/28748/27211.pdf

Enhanced surface melting of the Fennoscandian Ice Sheetduring periods of North Atlantic cooling
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boswell, Steven M.; Toucanne, Samuel; Pitel-roudaut, Mathilde; Creyts, Timothy T.; Eynaud, Frédérique; Bayon, Germain.
Heinrich events (HEs) are dramatic episodes of marine-terminating ice discharge and sediment rafting during periods of cold North Atlantic climate. However, the causal chain of events leading to their occurrence is unresolved. Here, we demonstrate that enhanced surface melting of land-terminating margins of the southern Fennoscandian Ice Sheet (FIS) is a recurring feature of Heinrich stadials (HSs), the cold periods during which HEs occur. We use neodymium isotopes to show that the Channel River transported detrital sediments from the interior of eastern Europe to the Bay of Biscay in the northeast Atlantic Ocean at ca. 158–154 ka. Based on similar evidence from the last glacial period, we infer that this interval corresponds to the melting and retreat of...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00499/61065/64596.pdf

Effect of low-molecular-weight fucoidan on experimental arterial thrombosis in the rabbit and rat
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Colliec-jouault, Sylvia; Millet, J; Helley, D; Sinquin, Corinne; Fischer, Am.
Tipo: Text
Palavras-chave: Arterial thrombosis; Polyaccharide; Fucoidan.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/publication-2116.pdf

Bioerosion of the coralline alga Hydrolithon onkodes by microborers in the coral reefs of Moorea, French Polynesia
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tribollet, A; Payri, C.
Calcareous skeletons of the coralline alga Hydrolithon onkodes are colonised by a variety of microboring organisms including euendolithic algae. The species composition of microboring organisms as well as the boring patterns and the boring activity differ between live and dead coralline crusts. The microborers inhabiting the live crusts form an obvious, macroscopically visible green layer in the basal part of the crust, which is in contact with the substratum underneath. Some species, primarily Plectonema terebrans (83 %) and Ostreobium quekettii (7 %) grow from the inside towards the crust's surface and produce a dense network of branched filaments. Following the death of the coralline alga, the skeletons are colonised at the surface and bored inward by...
Tipo: Text
Palavras-chave: Bioérosion; Récifs coralliens; Algues corallinacées; Endolithes; Polynésie française; Bioerosion; Coral reefs; Coralline algae; Endoliths; French Polynesia.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00322/43346/42880.pdf

No pre-zygotic isolation mechanisms between Schistosoma haematobium and Schistosoma bovis parasites: From mating interactions to differential gene expression
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kincaid-smith, Julien; Mathieu-bégné, Eglantine; Chaparro, Cristian; Reguera-gomez, Marta; Mulero, Stephen; Allienne, Jean-francois; Toulza, Eve; Boissier, Jérôme; Lamberton, Poppy H. L.
Species usually develop reproductive isolation mechanisms allowing them to avoid interbreeding. These preventive barriers can act before reproduction, “pre-zygotic barriers”, or after reproduction, “post-zygotic barriers”. Pre-zygotic barriers prevent unfavourable mating, while post-zygotic barriers determine the viability and selective success of the hybrid offspring. Hybridization in parasites and the underlying reproductive isolation mechanisms maintaining their genetic integrity have been overlooked. Using an integrated approach this work aims to quantify the relative importance of pre-zygotic barriers in Schistosoma haematobium x S. bovis crosses. These two co-endemic species cause schistosomiasis, one of the major debilitating parasitic diseases...
Tipo: Text
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00693/80481/83621.pdf

Rapid transport and high accumulation of amorphous silica in the Congo deep-sea fan: A preliminary budget
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Raimonet, Melanie; Ragueneau, Olivier; Jacques, Vincent; Corvaisier, Rudolph; Moriceau, Brivaela; Khripounoff, Alexis; Pozzato, Lara; Rabouille, Christophe.
Mechanisms controlling the transfer and retention of silicon (Si) along continental margins are poorly understood, but play a major role in the functioning of coastal ecosystems and the oceanic biological pump of carbon. Deep-sea fans are well recognized as carbon sink spots, but we lack knowledge about the importance of the fans in the global Si cycle. Here, we provide a first estimate of the role played by the Congo deep-sea fan, one of the biggest in the world, in the Si cycle. Sediment cores sampled in the deep-sea fan were analyzed to build a Si mass balance. An exceptionally high accumulation rate of amorphous silica aSiO(2) (2.29 +/- 0.58 mol Si m(-2) y(-1)) was found, due to a high sedimentation rate and the presence of aluminum in the sediments....
Tipo: Text
Palavras-chave: Continental margin; Land-sea export; Silica cycle; Congo canyon; Deep-sea fan.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00251/36242/35797.pdf

Inter-hemispheric asymmetry in the early Pleistocene Pacific warm pool
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Russon, T.; Elliot, M.; Sadekov, A.; Cabioch, G.; Correge, T.; De Deckker, P.
The position of the southern boundary of the Pacific warm pool is shown to have been stable since the early Pleistocene, based upon a planktic foraminiferal Mg/Ca-derived reconstruction of subtropical sea surface temperature in the Coral Sea. This contrasts with previous reconstructions showing warm pool contraction from the north and east and means that the early Pleistocene warm pool was more hemispherically asymmetric than its present configuration. The latter was not established until similar to 1Ma, supporting a strengthening of the northern Hadley Cell, which was not replicated in its southern counterpart, prior to the Mid-Pleistocene Transition.
Tipo: Text
Palavras-chave: Pacific warm pool; Mg/Ca paleothermometry; Mid-Pleistocene Transition.
Ano: 2010
URL: https://archimer.ifremer.fr/doc/00144/25527/23672.pdf

Design Polysaccharides of Marine Origin: Chemical Modifications to Reach Advanced Versatile Compounds
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chopin, Nathalie; Guillory, Xavier; Weiss, Pierre; Le Bideau, Jean; Colliec-jouault, Sylvia.
Polysaccharides are among the most abundant macromolecules on Earth. These polymers are easily obtained from various marine resources such as algae, microorganisms and crustacean shells. The structure of these natural carbohydrates is innovative and quite complex. Marine biopolymers represent key scaffolds toward large challenging fields, such as biomedical applications (glycosaminoglycans, regenerative medicine and drug delivery) and tailored biomaterials. Chemical modifications can be applied to modify their final properties in a specific purpose. New functional glycans are achievable and represent a real potential with their intrinsic biocompatibility and biodegradability. Hydroxyl groups are ubiquitous in polysaccharides structure and involved in most...
Tipo: Text
Palavras-chave: Alginates; Carrageenans; Chemical modification; Chitin; Chitosan; Grafting; Marine polysaccharide; Polymer.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00199/31027/29902.pdf

Influence du taux de renouvellement et de la qualité de l'eau sur l'affinage contrôlé de Crassostrea gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Baud, Jean-pierre; Palvadeau, Hubert; Nourry, Max.
Les expériences antérieures de prégrossissement d'huître creuse en système contrôlé ont montré qu'il était possible d'obtenir un engraissement significatif en poids de chair des huîtres lorsque celles-ci étaient affinées à une température comprise entre 10°C et 14°C et pour une ration alimentaire de 2.109 cell/animal/jour (Mornet, 1997). Pour des raisons économiques et afin de répondre à une demande forte au niveau des consommateurs, la période privilégiée de l'affinage annuel se situe en automne à partir du mois de septembre jusqu'en mars avec un pic de production avant les fêtes de Noël. En fonction des années, le climat varie et les caractéristiques physico-chimiques de l'eau de mer (température, salinité et turbidité) fluctuent et provoquent des...
Tipo: Text
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00304/41507/40715.pdf

Prevalence of Plasmodium spp. in the Amazonian Border Context (French Guiana-Brazil): Associated Factors and Spatial Distribution
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mosnier, Emilie; Roux, Emmanuel; Cropet, Claire; Lazrek, Yassamine; Moriceau, Olivier; Gaillet, Melanie; Mathieu, Luana; Nacher, Mathieu; Demar, Magalie; Odonne, Guillaume; Douine, Maylis; Michaud, Celine; Pelleau, Stephane; Djossou, Felix; Musset, Lise.
To implement future malaria elimination strategies in French Guiana, a characterization of the infectious reservoir is recommended. A cross-sectional survey was conducted between October and December 2017 in the French Guianese municipality of St Georges de l'Oyapock, located along the Brazilian border. The prevalence of Plasmodium spp. was determined using a rapid diagnostic test (RDT) and a polymerase chain reaction (PCR). Demographic, house locations, medical history, and biological data were analyzed. Factors associated with Plasmodium spp. carriage were analyzed using logistic regression, and the carriage localization was investigated through spatial cluster analysis. Of the 1,501 samples analyzed with PCR, positive results totaled 90 and 10 for...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00657/76880/78125.pdf

Evaluation de la qualité des zones de production conchylicole - Département du Morbihan - Edition 2012
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Allenou, Jean-pierre; Manach, Soazig.
Après un rappel des objectifs, du fonctionnement et de la méthode d’interprétation des résultats du réseau de contrôle microbiologique REMI et du réseau de surveillance chimique ROCCH, ce rapport inclut un bilan national et décrit le programme annuel du département du Morbihan. Il présente l’ensemble des résultats obtenus, en particulier l’estimation de la qualité microbiologique et chimique des zones de production de coquillages classées.En 2011 le nombre d’alerte est resté stable avec 10 alertes de niveau 1 et une seule alerte de niveau 2 (persistance de la contamination). Il faut noter des niveaux de concentrations particulièrement élevés, notamment sur les palourdes de la station « Port-Groix » sur la rivière de Pénerf. L’évaluation de la qualité des...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00086/19760/17401.pdf

Assessment of wind-forcing impact on a global wind-wave model using the TOPEX altimeter
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Feng, H; Vandemark, D; Quilfen, Yves; Chapron, Bertrand; Beckley, B.
The study presents assessment of an operational wave model (Wavewatch III), focusing upon the model sensitivity to wind-forcing products. Four wind fields are used to drive the model, including the NCEP/NCAR reanalysis and three other products that assimilate various satellite wind measurements having high spatial resolution, including the QuikSCAT scatterometer. Three wave field statistics: significant wave height, mean zero-crossing wave period, and mean square slope are compared with collocated TOPEX altimeter derivatives to gauge the relative skill of differing wind-forced model runs, as well as to demonstrate an extended use of the altimeter beyond simply supplying wave height for wave model validation and assimilation. Results suggest that model...
Tipo: Text
Palavras-chave: Sea state bias; Wind forcing; Scatterometer; Altimeter; Wave modeling.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1861.pdf

Influence de l'azote et du phosphore sur la croissance et la toxicité de Prorocentrum lima (Ehrenberg) Dodge
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Morlaix, Martine; Lassus, Patrick.
Very few attempts have been made in order to investigate the role of nutrients on cellular growth and toxin production in dinoflagellates associated with DSP (Diarrhetic Shellfish Poison). Some preliminary results are presented here, aiming at a better knowledge of inorganic nitrogen and organic phosphorus effects upon division rate and toxin content of Prorocentrum lima (PL2V spanish strain). Nitrogen have a positive effect on growth rate, up to a threshold value of 880muM.l-1. Above this threshold the rate decreases. There is no effect on toxin content since okadaic acid and DTX1 cell contents remain low (4.8 +/- 0.5 pg.cell.-1) and steady. Phosphorus effect upon division rate follows a non-linear relationship, whereas cellular toxic content is inversely...
Tipo: Text
Palavras-chave: Croissance; Toxicité; Concentration chimique; Division cellulaire; Production; Espagne; Phosphore; Azote; Europe; Nutriment; Milieu marin; Zone côtière; Ecotoxicologie; Pyrrophycophyta; Algae; Thallophyta; Okadaïque acide; Prorocentrum lima; Growth; Toxicity; Chemical concentration; Cell division; Production; Spain; Phosphorus; Nitrogen; Europe; Nutrient; Marine environment; Coastal zone; Ecotoxicology; Pyrrophycophyta; Algae; Thallophyta.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00133/24469/22483.pdf

A Case Study of Technological Switching and Technological Lock-In in the French Fisheries Sector: Why is Sustainable Change so Difficult?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Floc'H, Pascal; Daures, Fabienne; Guyader, Olivier; Wilson, James.
Many sectors such as the fishery show classic examples of technological lock-in and path dependence, even though some economists might predict smooth switching toward technologies that are more cost effective and sustainable. We use ideas from the evolutionary economics and public choice literatures to explain why trajectories of technological change, especially in fisheries, may not be smooth at all, but rather punctuated. The interest of technological change and switching behavior for fisheries economists and managers stems from the fact that control of effective effort, often necessary for sustainable management of the resource, remains a central management problem for that sector worldwide, even in developed countries. However, various policies put in...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00109/21987/20057.pdf

Intra-individual behavioral variability displayed by tuna at fish aggregating devices (FADs)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Robert, Marianne; Dagorn, Laurent; Filmalter, John David; Deneubourg, Jean-louis; Itano, David; Holland, Kim.
Fishers have exploited the associative behavior displayed by several pelagic fish species with floating objects for decades, through the use of man-made fish aggregating devices (FADs), which facilitate the capture of such species. However, our understanding of this associative behavior and its adaptive value is poor and the scientific community is ill-equipped to provide fishery managers with science-based recommendations on the impacts of FADs on ecosystems. In an array of 13 anchored FADs around Oahu, Hawaii, USA, 72 yellowfin tuna Thunnus albacares were equipped with internal acoustic tags, which facilitated the continuous monitored of their presence and absence around each FAD using automated acoustic receivers. Data were analyzed using survival...
Tipo: Text
Palavras-chave: Behavioral variability; Fish aggregating device; FAD; Yellowfin tuna; Acoustic tagging; Residence time; Survival curve.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00140/25098/23207.pdf

Food deprivation reduces social interest in the European sea bass Dicentrarchus labrax
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Aimon, Cassandre; Le Bayon, Nicolas; Le Floch, Stephane; Claireaux, Guy.
Periods of food deprivation up to several months are common features for fishes and in such conditions, fitness will be determined by their capacity to maximize food encounter while minimizing predation risk. In this context, the propensity to take risk and the willingness to associate with conspecifics are particularly important as they contribute to alleviating the trade-off between predation avoidance and foraging efficiency. This study examined to what extent food deprivation modulates fish risk-taking and social behaviours, as well as the relationship between them. To address these issues juvenile European sea bass were either fed daily with a maintenance ration or food-deprived during 3 weeks. Risk-taking and sociability were assessed through...
Tipo: Text
Palavras-chave: Behaviour; Teleost fish; Exploratory activity; Sociability; Risk taking; Behavioural interaction.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00474/58552/62391.pdf

Dinoflagelles toxiques sur les cotes francaises pendant l'ete 1983. Extension du dinoflagelle Dinophysis acuminata en Bretagne sud et consequences pour les cultures marines.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lassus, Patrick; Martin, A; Maggi, Pierre; Berthome, Jean-paul; Langlade, Aime; Bachere, Evelyne.
Discolored waters and human diseases by shellfishes were dominant features of summer 1983 in south coast of Brittany. Vilaine Bay, the most damaged area, was successively affected by brown waters in early June, and diarrhetic intoxications by harvested mussels (July and August), just as DPS producing dinoflagellate (D. acuminata ) reached higher water or mussel guts concentrations than years before. Outspreading in the whole south coast of Brittany and possible relation with hydrological or biological parameters are analyzed.
Tipo: Text
Palavras-chave: Brittany; France; ANE; Protista; Dinophysis acuminata; Shellfish culture; Red tides; Biological poisons; Toxicants.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/publication-1805.pdf

Structure et dynamique temporelle des communautés hydrothermales inféodées à la dorsale Juan de Fuca : utilisation d'une approche observatoire fond de mer
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lelièvre, Yann.
Hydrothermal vents are distributed along mid-ocean ridges and back-arc basins. These ecosystems harbour a specialized fauna supported by a local chemosynthetic microbial production, made possible through the oxidation of reduced elements present in the hydrothermal fluid. While the relationships between faunal assemblages and habitats have been relatively well described around the globe, our knowledge on the temporal dynamics of these environments is still limited, particularly at time scale relevant to organisms (from few minutes to several years). Based on hydrothermal vent communities occurring on the Juan de Fuca Ridge, located in the northeast Pacific Ocean, this thesis aims at understanding the functioning and temporal dynamics of macrofaunal...
Tipo: Text
Palavras-chave: Écologie hydrothermale; Observatoire fond de mer; Diversité; Réseaux trophiques; Dynamique temporelle; Imagerie; Temporal dynamics; Imagery; Food webs; Hydrothermal ecology; Seafloor observatory; Diversity.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00497/60907/64256.pdf

Modélisation des ondes infragravitaires : de l'échelle régionale à l'échelle mondiale
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rawat, Arshad.
Wind-generated surface gravity waves are ubiquitous at the ocean surface. Their period varies between 2 and 25 seconds, with wavelength varying between a few meters to several hundreds of meters. Longer and, lower frequency surface gravity waves, called infragravity (IG) waves, are associated to these short, high frequency wind-generated waves. These infragravity waves have dominant periods comprised between 30 seconds and 10 minutes, and, when they propagate freely, with horizontal wavelengths of up to tens of kilometres, as given by the linear surface gravity wave dispersion relation. Outside of surf zones, the vertical amplitude of these infragravity waves is of the order of 1-10 cm, while the amplitude of wind-generated waves is of the order of 1-10...
Tipo: Text
Palavras-chave: Ondes infragravitaires; Modélisation à l'échelle globale; Infragravity waves; SWOT; Global wave model.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00498/60937/64330.pdf

Activité des navires de pêche 2017 : façade Mer du Nord - Manche
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: SIH. Système d'Informations Halieutiques de l'Ifremer.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public.
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00490/60173/63517.pdf

An Annual Cycle of Submesoscale Vertical Flow and Restratification in the Upper Ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Yu, Xiaolong; Naveira Garabato, Alberto C.; Martin, Adrian P; Buckingham, Christian; Brannigan, Liam; Su, Zhan.
Numerical simulations suggest that submesoscale turbulence may transform lateral buoyancy gradients into vertical stratification, and thus restratify the upper ocean via vertical flow. However, the observational evidence for this restratifying process has been lacking due to the difficulty in measuring such ephemeral phenomena, particularly over periods of months to years. This study presents an annual cycle of the vertical velocity and associated restratification estimated from two nested clusters of meso- and submesoscale-resolving moorings, deployed in a typical mid-ocean area of the Northeast Atlantic. Vertical velocities inferred using the non-diffusive density equation are substantially stronger at submesoscales (horizontal scales of 1-10 km) than at...
Tipo: Text
Palavras-chave: Ocean; Atlantic Ocean; Ageostrophic circulations; Frontogenesis; Frontolysis; In situ oceanic observations.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00489/60076/63398.pdf

Numerical study of a suction anchor
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Grosjean, François; Kerampran, Steven; Rosu, Octavian; Bompais, Xavier.
This work aims at simulating the movement of a suction anchor using a new version of commercial code Fluent. The computations consider a sinusoidal movement of the anchor (roughly corresponding to its heave) both in a fluid at rest and in a uniform flow. They are validated with results of experimental tests performed by Ifremer using a scaled model of suction anchor.
Tipo: Text
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00455/56631/58366.pdf

Sea level variations and their dependency on meteorological and hydrological forcing: Analysis of altimeter and surface data for the Black Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Stanev, Ev; Le Traon, Pierre-yves; Peneva, El.
TOPEX/Poseidon (TIP) altimeter data in the Black Sea are analyzed for almost 5 years in parallel with available hydrological and meteorological data with the aim of studying the water balance and the dependency of sea level oscillations on meteorological and hydrological forcing. This forcing induces seasonal variations of mean sea level with oscillations of similar to 10-15 cm. The consistency between satellite and tidal gauge data is demonstrated in several coastal locations, and a mean ascending trend of similar to 3 cm yr(-1) is found in the two data sets. The variability in all components of water balance, including the Bosphorus outflow calculated as the difference between the fresh water flux and the time rate of sea level change estimated from...
Tipo: Text
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00079/19034/16616.pdf

Satellite Air - Sea fluxes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bentamy, Abderrahim; Katsaros, Kristina; Queffeulou, Pierre.
This chapter addresses the estimation of global surface winds, surface wind stress, latent heat flux, and sensible heat flux over the oceans with high spatial and temporal resolution using satellite radar and radiometer measurements. An overview of the physics of remotely sensed data, of methods and algorithms used to retrieve surface fluxes is provided. The retrievals are used to estimate regular in space and time surface parameters, requested for oceanic forcing function, over global ocean. The characteristics of the former are investigated at global and regional scales.
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00030/14101/11333.pdf

Etude intégrée du secteur Loire Vilaine : synthèse des connaissances, analyse des problématiques
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Baudrier, Jérôme.
The coastal area located between Quiberon and Noirmoutier is influenced by dilution plumes of the Loire and Vilaine rivers. Dysfunctions linked with a growing eutrophication of the environment have been observed over the last decades. Important imbalances such as massive deaths of the fauna in open embayments and more and more appearances of red tides give the area a unique character. Other environ mental problems are likely to disrupt human activites in the near future (bays silting up, quality of coastal water worsening, overfishing ...). This is why there is a real need to gather information on the subject. This will make it possible to identify problems and gaps in the area. Beside presenting pieces of information, the study offers various reflection...
Tipo: Text
Palavras-chave: Loire; Vilaine; Panaches de dilution; Eutrophisation; Déséquilibres; Écosystème.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00016/12702/9624.pdf

The Benefits of the Ka-Band as Evidenced from the SARAL/AltiKa Altimetric Mission: Scientific Applications
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Verron, Jacques; Bonnefond, Pascal; Aouf, Lofti; Birol, Florence; Bhowmick, Suchandra A.; Calmant, Stephane; Conchy, Taina; Cretaux, Jean-francois; Dibarboure, Gerald; Dubey, A. K.; Faugere, Yannice; Guerreiro, Kevin; Gupta, P. K.; Hamon, Mathieu; Jebri, Fatma; Kumar, Raj; Morrow, Rosemary; Pascual, Ananda; Pujol, Marie-isabelle; Remy, Elisabeth; Remy, Frederique; Smith, Walter H. F.; Tournadre, Jean; Vergara, Oscar.
The India-France SARAL/AltiKa mission is the first Ka-band altimetric mission dedicated primarily to oceanography. The mission objectives were firstly the observation of the oceanic mesoscales but also global and regional sea level monitoring, including the coastal zone, data assimilation, and operational oceanography. SARAL/AltiKa proved also to be a great opportunity for inland waters applications, for observing ice sheet or icebergs, as well as for geodetic investigations. The mission ended its nominal phase after three years in orbit and began a new phase (drifting orbit) in July 2016. The objective of this paper is to highlight some of the most remarkable achievements of the SARAL/AltiKa mission in terms of scientific applications. Compared to the...
Tipo: Text
Palavras-chave: Altimetry; Ka-band; Oceanography; Hydrology; Ice; Geodesy.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00600/71248/69623.pdf

Reproductive Biology of Albacore Tuna (Thunnus alalunga) in the Western Indian Ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dhurmeea, Zahirah; Zudaire, Iker; Chassot, Emmanuel; Cedras, Maria; Nikolic, Natacha; Bourjea, Jerome; West, Wendy; Appadoo, Chandani; Bodin, Nathalie.
The reproductive biology of albacore tuna, Thunnus alalunga, in the western Indian Ocean was examined through analysis of the sex ratio, spawning season, length-at-maturity (L50), spawning frequency and fecundity. From 2013 to 2015, a total of 923 female and 867 male albacore were sampled. A bias in sex ratio was found in favor of females with fork length (LF) &lt; 100 cm. Using histological analyses and gonadosomatic index, spawning was found to occur between 10°S and 30°S, mainly to the east of Madagascar from October to January. Large females contributed more to reproduction through their longer spawning period compared to small individuals. The L50 (mean ± standard error) of female albacore was estimated at 85.3 ± 0.7 cm LF. Albacore spawn on average...
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00362/47284/47261.pdf

Etude numérique du train de pêche d'un chalutier (DEA)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Theret, Francois.
IFREMER aims at digitalizing trawl gear in order to reach two goals: on the one hand, participating in the realisation of a computer assisted trawl conception software; on the other hand, being able to study quickly and easily the influence of different adjustment parameters on the shape of the trawl in order to indicate to the skipper, if possible in real time, the optimal adjustment for the conditions he's in. From an international point of view, there are only two strategies to approach this problem: - the first strategy is based on statistical studies on the existing nets (almost limited to their reproduction on different scales), but this approach does not leave much room for innovation as it can only be applied to the same type of nets as those that...
Tipo: Text
Palavras-chave: Experimentation; Optimization; Adjustment; Hydrodynamic; Modelization; Trawl gear; Trawl; Expérimentation; Maquette de chalut; Optimisation; Réglage; Hydrodynamique; Modèle numérique; Train de pêche; Chalut.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/1990/these-3627.pdf

Impact des rejets d’assainissement permanents ou transitoires sur la qualité des eaux de baignade
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Blanchet, F.; Soyeux, E.; Deutsch, J.-c.; De Roeck, Yann-herve.
La vulnérabilité des eaux de baignade aux rejets d’assainissement constitue à ce jour une sorte de « fait acquis ». Grâce aux progrès accomplis durant les quinze dernières années, les rejets de temps sec présentent aujourd’hui un caractère accidentel. La vulnérabilité aux rejets par temps de pluie, souvent massifs du fait du nombre de points de déversement et de leur extension géographique, est certes connue des « spécialistes » mais en général encore mal appréhendée. La nouvelle directive européenne sur les eaux de baignade introduit tout un ensemble de dispositions qui visent une meilleure maîtrise des sources de pollution : sur le long terme, plan d’éradication ou de diminution en cas d’insuffisance et sur le court terme, plan de gestion supposant un...
Tipo: Text
Palavras-chave: Qualité des eaux de baignade; Rejets d’assainissement; Modélisation courantologique; Maîtrise opérationnelle des risques.
Ano: 2007
URL: https://archimer.ifremer.fr/doc/00480/59155/61784.pdf

Le poisson en filets et en tranches
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Collignon, J; Dorer, G; Jacques, F.
La distribution des produits de la pêche connaît depuis plusieurs années une importante évolution dans la présentation des denrées offertes au consommateur : le pourcentage des poissons présentés sous une forme élaborée connaît une progression constante. Nous espérons que les agents de contrôle, les professionnels à tous les stades de la commercialisation, les responsables des collectivités publiques et privées ainsi que les consommateurs tireront profit de cet ouvrage consacré à l'identification des espèces commercialisées sous forme de filets et de tranches se prêtant, beaucoup plus que les poissons entiers, aux "erreurs" de dénomination.
Tipo: Text
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/publication-7035.pdf

Analyse économique et financière de la vénériculture. Perspectives de développement de la filière palourde d'élevage
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Goff, P. Y.
Clam culture is a shellfish farming activity that has now entered a phase that will determine its future. After the first experimental trials and pilot projects, private investors have set this new aquaculture activity in motion. Today, the progress of clam production is conditioned, in part, on public authorities and financial organisations. On what basis should decisions be made so that appropriate choices are made for the development of clam culture, while respecting other users of coastal areas? This financial and economic study of clam culture seeks to give an overview of current clam farming by analysing operations that have entered the production phase. This approach to productivity of this activity will be done using classical financial analysis...
Tipo: Text
Palavras-chave: SEM.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/these-4082.pdf

Crepidula fornicata L. dans le bassin de Marennes-Oléron - Rapport 1984
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Deslous Paoli, Jean-marc.
Dans le bassin de Marennes- Oléron , Crepidula fornicata a principalement colonisé trois secteurs (les bords du banc de Charret, le courant d'Oléron, les abords de l'Estrée) à des densités dépassant 2 500 individus au mètre carré, mais aussi présente de façon diffuse dans tout le nord du bassin. La biomasse estimée, pour les deux premiers secteurs, est d'environ 3 700 tonnes dont 1 500 tonnes ont été draguées et rejetées à terre en 1983. Il semble par ailleurs qu'il y ait un début d'infestation des gisements à Pecten maximus dans le pertuis d'Antioche. La courbe de croissance moyenne de Crepidula fornicata a été définie en fonction de l'âge (Lc = 78,79 (1 - e - 0,439(t - 0,347)) , et , du fait de la correspondance âge-position dans les associations en...
Tipo: Text
Palavras-chave: Crepidula fornicata; Répartition géographique; Dynamique de population; Biodéposition; Biologie; Filtration; Bassin de Marennes Oléron.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/00092/20357/18018.pdf

Consommation d'oxygene de la crevette japonaise, Penaeus japonicus , en fonction de l'oxygenation du milieu: Effects de la temperature et de l'acclimatation a des conditions ambiantes hypoxiques
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Truchot, J; Jouve, D.
Oxygen consumption of juvenile prawns, Penaeus japonicus , was measured during the day at 4 temperatures (23, 26, 30 and 33 degree C) and at various oxygenation levels. For inactive prawns burrowed into sand, respiratory metabolism was maintained almost constant in hypoxia above a critical oxygen pressure of about 30-40 Torr. Data analysis according to a hyperbolic model indicates that the capacity for metabolic regulation was optimal between 26 and 30 degree C. Prawns acclimated 1-2 weeks at 20 degree C in moderate hypoxia (P sub(O2) around 50-55 Torr) showed a reinforced regulation of oxygen consumption when compared to normoxic controls.
Tipo: Text
Palavras-chave: Penaeus japonicus; Malacostraca; Juveniles; Respiration; Hypoxia; Dissolved oxygen; Temperature effects; Oxygen consumption; Crevettes Pénaeides; Température; Hypoxie; Métabolisme respiratoire.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1192.pdf

Bilan sur les principales pressions pesant sur les lagunes méditerranéennes et leurs liens avec l’état DCE
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Derolez, Valerie; Fiandrino, Annie; Munaron, Dominique; Cadoret, Marine.
L’objectif de cette étude est de mettre en évidence et de hiérarchiser les pressions anthropiques ayant le plus d’impact sur les éléments de qualité DCE sur les lagunes méditerranéennes et de consolider ainsi les liens état/pressions. Il s’agit également de mettre en évidence des groupes de masses d’eau homogènes en termes de pressions. Ce travail s’appuie sur les précédentes études menées sur le sujet (Battut, 2010 ; Bouchoucha et al., 2010 ; Meinesz et al., 2013) et vise à les compléter grâce : • à la mise en œuvre d’une approche descriptive multidimensionnelle qui permet de mettre en évidence les interactions entre les différentes métriques de pression et d’état et de regrouper les masses d’eau similaires, • à l’intégration de données de pression et...
Tipo: Text
Palavras-chave: Lagunes; Pressions anthropiques; État DCE.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00254/36574/35112.pdf

Activités parapétrolières et paragazières offshore. Sous-région marine Mers celtiques. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guingand, Aurélien.
Tipo: Text
Palavras-chave: Mers celtiques; Activités parapétrolières; Activités paragazières; Offshore; Réglementation; Interaction avec le milieu.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00329/43988/43560.pdf

Synthesis of new scientific challenges for GODAE OceanView
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Schiller, Andreas; Bell, Mike; Brassington, Gary; Brasseur, Pierre; Barciela, Rosa; De Mey, Pierre; Dombrowsky, Eric; Gehlen, Marion; Hernandez, Fabrice; Kourafalou, Villy; Larnicol, Gilles; Le Traon, Pierre-yves; Martin, Matthew; Oke, Peter; Smith, Gregory C.; Smith, Neville; Tolman, Hendrik; Wilmer-becker, Kirsten.
The marine environment plays an increasingly important role in shaping economies and infrastructures, and touches upon many aspects of our lives, including food supplies, energy resources, national security and recreational activities. Global Ocean Data Assimilation Experiment (GODAE) and GODAE OceanView have provided platforms for international collaboration that significantly contribute to the scientific development and increasing uptake of ocean forecasting products by end users who address societal issues such as those listed above. Many scientific challenges and opportunities remain to be tackled in the ever-changing field of operational oceanography, from the observing system to modelling, data assimilation and product dissemination. This paper...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00284/39522/38015.pdf

Use of passive and active tracers in the biogeochemical-3D hydrodynamical ECO-MARS3D model to assess the role of river inputs on coastal zone of France, British Channel and southern North Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dussauze, Morgan; Menesguen, Alain; Dumas, Franck.
Two techniques of tracking are compared for delineating the marine area impacted by a river plume. The first one uses a simple conservative tracer released in the river during a several year long period: the probability density function of the tracer concentration in each mesh of the model is used to map 3 characteristic descriptors of the freshwater influence (10%, 50% and 90% percentiles). The second one uses a signature of the river attached to a state variable of a biogeochemical model (e.g. the Dissolved Inorganic Nitrogen components), which can be followed in space and time in the various nitrogenous state variables. Departure between the two methods increases when tracking of nitrogen is considered in biogeochemical forms more and more distant from...
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00068/17892/15423.pdf

Peripatric speciation drives diversification and distributional pattern of reef Hermit Crabs (Decapoda: Diogenidae: Calcinus)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Malay, Maria Celia (machel) D.; Paulay, Gustav.
The diversity on coral reefs has long captivated observers. We examine the mechanisms of speciation, role of ecology in speciation, and patterns of species distribution in a typical reef-associated clade-the diverse and colorful Calcinus hermit crabs-to address the origin of tropical marine diversity. We sequenced COI, 16S, and H3 gene regions for similar to 90% of 56 putative species, including nine undescribed, "cryptic" taxa, and mapped their distributions. Speciation in Calcinus is largely peripatric at remote locations. Allopatric species pairs are younger than sympatric ones, and molecular clock analyses suggest that &gt; 2 million years are needed for secondary sympatry. Substantial niche conservatism is evident within clades, as well as a few major...
Tipo: Text
Palavras-chave: Allopatric speciation; Biodiversity; Biogeography; Color pattern evolution; Circumtropical speciation; Coral reef; Coral triangle; Cryptic species; Crustacea; ESU; Indo-Malayan hot spot; Molecular phylogenetics; Sympatric speciation.
Ano: 2010
URL: https://archimer.ifremer.fr/doc/00495/60623/64108.pdf

Etude de la qualité des eaux de l'estuaire de L'Adour. Résultats du suivi matière vivante, année 2001.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Trut, Gilles.
L'estuaire de l'Adour, caractérisé par une taille réduite et une embouchure fortement urbanisée et industrialisée, constitue un enjeu socio-économique fort pour le département des Pyrénées-Atlantiques. Dans ce contexte, un Secrétariat Permanent à la Prévention des Pollutions Industrielles (SPPPI), chargé de veiller à la préservation de l'écosystème estuarien est créé en 1999. L'étude de la qualité de l'estuaire de l'Adour, programmée sur trois années (2001-2003) a été initiée par le Groupe "Eau" émanant de cette structure. Elle comporte trois volets indissociables confiés à trois organismes différents - L'Université de Pau étudie plus particulièrement la contamination des sédiments de l'estuaire. - La CQEL 64 est chargée de l'évaluation de la qualité de...
Tipo: Text
Palavras-chave: Matière vivante; Contaminants; Estuaire de l'Adour; Qualité des eaux.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00424/53533/54389.pdf

Comparaison de la croissance et de la mortalité de différentes familles et lignées d'huître plate Ostrea edulis en système intensif
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Baud, Jean-pierre; Le Bayon, Nicolas; Haure, Joel; Nourry, Max; Palvadeau, Hubert; Penisson, Christian; Naciri-graven, Yamama; Goyard, Emmanuel; Barre, Marc.
As of 1985, Ifremer set up a selection programme for resistance to the protozoan Bonamia ostreae in European flat oysters (Ostrea edulis). Two selection lines, L85 and L89, from the third and second generation, respectively, were produced with 17 and 21 different families. The experimental design also included a mixed line (L85 x L89) of seven families and a control line of five families from Quiberon broodstock maintained without selection pressure.
Tipo: Text
Palavras-chave: Croissance; Génétique; Huîtres plates; Ostrea edulis.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/1997/acte-3245.pdf

Suivi des données acquises par la station de mesure MOLIT en baie de Vilaine entre mars et septembre 2011
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Retho, Michael; Gabellec, Raoul.
La station de mesure Molit entre dans la gamme de produits MAREL. Cette gamme est constituée d’outils développés pour l’observation en continu de paramètres hydrologiques. La bouée Molit a été déployée en baie de Vilaine du 2 mars 2011 au 22 septembre 2011. Cette station est équipée : - d’une sonde multipramètre MP6 qui mesure les paramètres : température, salinité, oxygène dissous, turbidité et fluorescence. Les mesures sont réalisées à 2 niveaux (surface et fond) avec une fréquence de une mesure horaire. - de deux analyseurs de nutriments (Chemini) mesurant les concentrations en nitrate et silicate avec une fréquence de une mesure toutes les 12 heures. Les données acquises par la bouée MOLIT sont transmises par liaison GSM numérique à la station de...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00117/22814/20621.pdf

Ticks (Acari: Ixodidae) infesting cattle and some other domestic and wild hosts on the French Mediterranean island of Corsica
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Grech-angelini, Sebastien; Stachurski, Frederic; Lancelot, Renaud; Boissier, Jerome; Allienne, Jean-francois; Marco, Sylvain; Maestrini, Oscar; Uilenberg, Gerrit.
Background: Corsica is a mountainous French island in the north-western Mediterranean presenting a large diversity of natural environments where many interactions between domestic animals and wild fauna occur. Despite a favourable context for ticks and tick-borne diseases (TBDs), the tick fauna of Corsica has not systematically been investigated. Methods: For one year (May 2014-May 2015), a survey of ticks infesting cattle was performed in the three Corsican cattle slaughterhouses. Two of these were visited monthly and one quarterly; the ticks were manually collected, just after flaying. Ticks were identified on their morphology; when necessary, some specimens were also molecularly identified by sequencing mitochondrial cox1 (cytochrome c oxidase subunit...
Tipo: Text
Palavras-chave: Ticks (Ixodidae); Cattle; Domestic animals; Wild animals; Molecular identification; Corsica.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00361/47191/71863.pdf

Tectonic regime controls clustering of deformation bands in porous sandstone
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Soliva, Roger; Ballas, Gregory; Fossen, Haakon; Philit, Sven.
Porous sandstones tend to deform by the formation of low-permeability deformation bands that influence fluid flow in reservoir settings. The bands may be distributed or localized into clusters, and limited recent data suggest that tectonic regime may exert control on their distribution and clustering. In order to explore this suggestion, we performed a synthetic analysis based of 73 sets of bands, including 22 new sets measured for a reverse Andersonian regime that fill the important gap in data for this context. We find a surprisingly strong correlation between clustering and tectonic regime, where bands clearly are more distributed in the reverse regime compared to the normal regime. Together with the observed band distributions, capillary pressure data...
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00345/45668/45543.pdf

The market for fresh sole and its importance in northern french fisheries
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ioannidis, Chris; Lantz, Frederic.
(Not controled OCR) Sole is a species whose market has been expanding steadily since the end of the 70's ; landings have doubled, from 4097t in 1979 to 8048t in 1987. In real terms (1980=100) the value of landings has increased from FF124 m to FF265 m over the same period. One must appreciate that the importance of fresh sole lies in its high valuation. Despite the fact that the species occupies no more than 1.66% of total landings in terms of weight, in value terms exceeds 8.5% of the total, making sole the third most valuable species in France. Sole is consumed essentialy fresh and its price to the consumer does not therefore depend on any transformation process. It depends solely on demand and supply (domestic landings plus imports) conditions. The role...
Tipo: Text
Palavras-chave: SEM.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/1990/acte-2463.pdf

Warming of surface waters in the mid-latitude North Atlantic during Heinrich events
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Naafs, B. D. A.; Hefter, J.; Grutzner, J.; Stein, R.
During the six Heinrich events of the last 70 kyr, episodic calving from the circum-Atlantic ice sheets released large numbers of icebergs into the North Atlantic. These icebergs and associated meltwater flux are hypothesized to have led to a shutdown of Atlantic Meridional Overturning Circulation and severe cooling in large parts of the Northern Hemisphere. However, due to the limited availability of high-resolution records, the magnitude of sea surface temperature (SST) changes related to the impact of Heinrich events on the midlatitude North Atlantic is poorly constrained. Here we present a record of U-37(K)-based SSTs derived from sediments of Integrated Ocean Drilling Project Site U1313, located at the southern end of the ice-rafted debris (IRD) belt...
Tipo: Text
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00262/37305/35717.pdf

The vesicomyid bivalve habitat at cold seeps supports heterogeneous and dynamic macrofaunal assemblages
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guillon, Erwan; Menot, Lenaick; Decker, Carole; Krylova, Elena; Olu, Karine.
The high biodiversity found at cold seeps, despite elevated concentrations of methane and hydrogen sulfide, is attributed to multiple sources of habitat heterogeneity. In addition to geological and geochemical processes, biogenic habitats formed by large symbiont-bearing taxa, such as bivalves and siboglinid tubeworms, or by microbial mats drive the biodiversity of small-sized fauna. However, because these habitat-forming species also depend on geochemical gradients, the respective influence of abiotic and biotic factors in structuring associated macrofaunal communities is often unresolved. The giant pockmark Regab located at 3200 m depth on the Congo margin is characterized by different fluid-flow regimes, providing a mosaic of the most common biogenic...
Tipo: Text
Palavras-chave: Cold-seep; Macrofauna; Diversity; Dynamics; Vesicomyid clams; Gulf of Guinea.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00361/47210/47165.pdf

Campagne d’évaluation du stock de palourdes du Golfe du Morbihan. 2, 3, 4 et 5 avril 2019
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: D'Hardivillé, Céline; Bouche, Ludovic.
Depuis 2001, une évaluation annuelle de ce stock est réalisée en mars, elle a pour objectifs : - d’estimer la biomasse du stock et sa répartition afin de procéder à l’estimation de la biomasse exploitable, en particulier, sur les zones réservées à la pêche professionnelle ; - d’établir un diagnostic, avec une vision à moyen terme, sur l’état du stock. Ce document rend compte : - des résultats de l’évaluation directe annuelle du stock de palourdes du Golfe du Morbihan et de la rivière de Noyalo qui s’est déroulée, en collaboration avec les professionnels, du 2 au 5 avril 2019 ; - de l’analyse des données de pêche TELECAPECHE fournies par les pêcheurs professionnels pour la saison de pêche 2018, émanant du CDPMEM du Morbihan. Ces études constituent une aide...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00597/70930/79570.pdf

Metazooplankton communities in the Ahe atoll lagoon (Tuamotu Archipelago, French Polynesia): Spatiotemporal variations and trophic relationships
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pagano, Marc; Sagarra, Pascual-boi; Champalbert, Gisele; Bouvy, Marc; Dupuy, Christine; Thomas, Yoann; Charpy, Loic.
Metazooplankton abundance, biomass (&lt;80 mu m, 200-500 mu m and &gt;500 mu m) and community structure in the Ahe atoll were studied together with their relationships with environmental factors (temperature, salinity, wind) and trophic factors (phytoplankton, bacteria, heterotrophic nanoflagellates (HNF) and ciliates) during three periods in 2008-2009. Meroplankton, mainly bivalve and gastropod larvae, was dominant. Holoplankton was dominated by copepods, the main species being Oithona spp., Paracalanus parvus, Clausocalanus spp., Corycaeus spp., Acartia fossae and Undinula vulgaris. The results suggest a clear wind influence on the structure and horizontal distribution of the zooplankton communities. The metazooplankton appeared to be controlled mainly...
Tipo: Text
Palavras-chave: Metazooplankton; Spatio-temporal patterns; Trophic relationships; Pearl oyster; Atoll lagoon; French Polynesia.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00101/21207/19419.pdf

Typology of hydrological structures modelled and observed over the Bay of Biscay shelf
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Planque, Benjamin; Lazure, Pascal; Jegou, Anne-marie.
Collecting hydrological observations over the whole Bay of Biscay continental shelf can require several weeks. As a result, the observations are not truly synoptic and the interpretation of hydrological structures is corrupted by the time-lags between observations at distinct locations. We evaluated the effects of non-synoptic sampling during a spring cruise (17 April to 13 May 2000), using outputs from 3D hydrodynamic models as a substitute for true synoptic sampling. We developed a method for clustering hydrological regions based on the vertical structure of the water column and temporal changes in hydrography. In parallel, outputs from the 3D model were compared with field observations. The results show that in spring 2000 the Bay of Biscay continental...
Tipo: Text
Palavras-chave: Typology; Spatial temporal interactions; Hydrodynamics; Clustering analysis; Bay of Biscay.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-3959.pdf

Troubles d'origines biotique et abiotiques des macrophytes marins d'interêts alimentaires et industriel - Catalogue 1991
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Campello, Francois.
Ce catalogue regroupe les troubles connus qui peuvent affecter les macrophytes cultivées dans le monde, appartenant aux familles des Phéophycées et des Rhodophycées. Des virus, des bactéries, des champignons, des épiphytes et des endophytes divers, ainsi que des agents encore non identifiés et des substances chimiques, naturelles ou dues à l'activité humaine, peuvent compromettre la qualité et les rendements en algoculture.
Tipo: Text
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00080/19133/16728.pdf

Mécanismes de bioaccumulation des germes par les mollusques - Etude "in situ"
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Morel, Marc.
La présente étude a été réalisée par le laboratoire "Contrôle et suivi des ressources et de leurs utilisations" (CSRU) du Centre de l'Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) de Boulogne-sur-Mer. Elle entre dans le cadre du programme quinquennal de recherche sur l'environnement littoral Nord/Pas-de-Calais et fait suite aux premières études sur l'état et l'origine de la pollution bactérienne des moules et autres coquillages qui ont donné lieu à l'établissement de deux rapports en avril 1983 et juin 1984.
Tipo: Text
Ano: 1985
URL: http://archimer.ifremer.fr/doc/00081/19221/16816.pdf

A Novel Bacterial Pathogen of Biomphalaria glabrata: A Potential Weapon for Schistosomiasis Control?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Duval, David; Galinier, Richard; Mouahid, Gabriel; Toulza, Eve; Allienne, Jean Francois; Portela, Julien; Calvayrac, Christophe; Rognon, Anne; Arancibia, Nathalie; Mitta, Guillaume; Theron, Andre; Gourbal, Benjamin.
Background Schistosomiasis is the second-most widespread tropical parasitic disease after malaria. Various research strategies and treatment programs for achieving the objective of eradicating schistosomiasis within a decade have been recommended and supported by the World Health Organization. One of these approaches is based on the control of snail vectors in endemic areas. Previous field studies have shown that competitor or predator introduction can reduce snail numbers, but no systematic investigation has ever been conducted to identify snail microbial pathogens and evaluate their molluscicidal effects. Methodology/Principal findings In populations of Biomphalaria glabrata snails experiencing high mortalities, white nodules were visible on snail...
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00615/72716/71712.pdf

Temporal variability in the Pacific oyster spatfall along the French Coast: a new monitoring project
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pouvreau, Stephane; Maurer, Daniele; Auby, Isabelle; Soletchnik, Patrick; Mille, Dominique; Bernard, Ismael; Bedier, Edouard.
In France, spatfall of Pacific Oysters occurs traditionally in two shellfish area of the south west of France: the Marennes-Oléron bay and the Arcachon basin. The spat collected in both sites ensures approx. 70 % of the need of the French oysters production (the other part is produced in hatcheries). But, since ten years, recruitment have become highly variable especially in Arcachon basin. For instance, in this site, spatfall (assessed at the end of the reproductive season) can vary between 50 oysters per collector to more than 20 000 oysters per collector (Figure 1). This huge variation arise questions from oysters producers and the French National Committee for Shellfish Culture want to get some explanations of the phenomenon. It is well known that...
Tipo: Text
Palavras-chave: Larvae; Reproduction; Recruitment; Spatfall; Crassostrea gigas.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/acte-4543.pdf

Dynamics of the Estuarine Turbidity Maximum Zone from Landsat-8 Data: The Case of the Maroni River Estuary, French Guiana
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Abascal-zorrilla, Noelia; Vantrepotte, Vincent; Huybrechts, Nicolas; Ngoc, Dat Dinh; Anthony, Edward J.; Gardel, Antoine.
The estuarine turbidity maximum (ETM) zone occurs in river estuaries due to the effects of tidal dynamics, density-driven residual circulation and deposition/erosion of fine sediments. Even though tropical river estuaries contribute proportionally more to the sediment supply of coastal areas, the ETM in them has been hardly studied. In this study, surface suspended particulate matter (SPM) determined from OLI (Operational Land Imager)-Landsat 8images was used to gain a better understanding of the spatio-temporal dynamics of the ETM of the tropical Maroni estuary (located on the Guianas coast, South America). A method to estimate the remotely-sensed ETM location and its spatiotemporal evolution between 2013 and 2019 was developed. Each ETM was defined from...
Tipo: Text
Palavras-chave: Estuarine turbidity maximum; Landsat-8; Tropical estuary; Mud banks; French Guiana.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00641/75263/75468.pdf

The neurohormonal induction of the release of oocytes and sperm from Pecten maximus
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Devauchelle, Nicole; Micarelli, P; Guerrier, P; Desilets, J.
In order to induce in vitro maturation of Pecten maximus oocytes, experiments were carried out using different concentrations of the serotonin and dopamine agonists TFMPP, 8-OHDPAT, quinpirole and bromocriptine. The greatest germinal vesicle breakdown (GVBD) occurred using TFMPP. Metaphasic blocks were rarely observed. Oocytes treated with TFMPP at 10 super(-3) and 5x10 super(-4) M could be fertilized at low levels. The maximum fertilization rate recorded was 23%. A second series of experiments was conducted to determine the effects of serotonin, dopamine, the agonists cited above and PGE sub(2) on the release of oocytes and sperm from P. maximus. These inducers were injected into both the male and female parts of the gonads and spermiation was...
Tipo: Text
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00049/15985/13428.pdf

Comment on "Anomalous radiocarbon ages for foraminifera shells" by W. Broecker et al.: A correction to the western tropical Pacific MD9821-81 record
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Stott, Lowell D.
Tipo: Text
Ano: 2007
URL: https://archimer.ifremer.fr/doc/00233/34435/32931.pdf

Recirculation is it viable ? Is it insurable ?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Paquotte, Philippe.
Recirculation techniques in aquaculture exist and are applied at an industrial scale in sea-bass, sea-bream and turbot rearing for sho rt (incubation, larval rearing, weaning) or long (broodstock) rearing phases whatever the biomass. Experiments are carried out by IFREMER in partnership with producers and equipment makers to develop super intensive fish production in closed system. From the economic viewpoint, recirculation makes it possible to reduce fingerling production cost while it is still unknown in the case of ongrowing. From the insurance viewpoint, recirculation will make risk appraisal and risk m anagement easier. [NOT CONTROLLED OCR]
Tipo: Text
Palavras-chave: SEM.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/1994/acte-4014.pdf

Recherche des meilleurs sels pour le salage de la morue
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fillon, R.
Nous avons indiqué précédemment (1) que, pour répondre à la demande de l'armement à la grande pêche, nous avions entrepris au laboratoire une étude en vue de rechercher quels pouvaient être les meilleurs sels pour le salage de la morue. [OCR NON CONTRÔLE]
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1929
URL: http://archimer.ifremer.fr/doc/1929/publication-5813.pdf

Quartier maritime Saint-Brieuc. 2019. Activité des navires de pêche.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d’Informations Halieutiques » (SIH) de l’Ifremer, qui constitue le réseau d’observation des ressources halieutiques et des usages associés. Ce projet s’inscrit dans la mission de service d’intérêt public de l’Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l’analyse du secteur des pêches, le SIH a en charge l’élaboration d’indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche et du grand public.
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00650/76217/77180.pdf

Suivi de l'Imposex sur le littoral français de la Manche et de l'Atlantique en 2012 avec intégration des données 2010 et 2011
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Toxem.
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00315/42579/41949.pdf

Modélisation hydrodynamique du canyon de Cassidaigne
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cappelli, Robin.
Les canyons sous-marins au large du golfe du Lion constituent des zones d'échange entre les eaux du plateau et celles du large. Ces échanges sont fortement contraints par la dynamique locale et environnante. Or, ces canyons constituent des lieux d'habitat privilégiés pour certaines espèces de coraux méditerranéens. Les coraux d'eau froide vivent en profondeur fixés sur la roche et à des températures inférieures à 15°C. Ils ont notamment été observés sur les flancs du canyon de Cassidaigne situé au large de Cassis (calanques de Marseille), dans une zone connue pour être le siège d'upwellings intenses associés aux forts vents d'Ouest-Nord Ouest. Au niveau du canyon, les processus d'upwelling, de downwelling, la présence d'oscillations inertielles et les...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00254/36496/35041.pdf

Evidence of ventilation changes in the Arabian Sea during the late Quaternary: Implication for denitrification and nitrous oxide emission
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pichevin, Laetitia; Bard, Edouard; Martinez, Philippe; Billy, Isabelle.
Modern seawater profiles of oxygen, nitrate deficit, and nitrogen isotopes reveal the spatial decoupling of summer monsoon-related productivity and denitrification maxima in the Arabian Sea (AS) and raise the possibility that winter monsoon and/or ventilation play a crucial role in modulating denitrification in the northeastern AS, both today and through the past. A new high-resolution 50-ka record of delta(15) N from the Pakistan margin is compared to five other denitrification records distributed across the AS. This regional comparison unveils the persistence of east-west heterogeneities in denitrification intensity across millennial-scale climate shifts and throughout the Holocene. The oxygen minimum zone (OMZ) experienced east-west swings across...
Tipo: Text
Palavras-chave: Marine N cycle; Abrupt climate changes; Arabian Sea.
Ano: 2007
URL: https://archimer.ifremer.fr/doc/00233/34461/32865.pdf

Bilan de la première période d'élevage du silure glane (Silurus glanis) en condition tropicale et en circuit recyclé. (Collaboration Ifremer Palavas/Les Viviers de la Castillonne)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gasset, Eric; Aubry, J.p.; Blancheton, Jean-paul.
La production Française du Silure glane stagne depuis plusieurs années pour plusieurs raisons principales: la qualité des alevins produits par les entreprises existantes n'est pas optimale, notamment pour un élevage intensif; les techniques de production extensives et semi-intensives en bassins de terre se heurtent à un profil d'évolution thermique naturelle inadapté à cette espèce d'origine continentale, ce qui ce traduit par des croissances aléatoires, des pathologies difficiles à maîtriser et une qualité de chair non optimale; les techniques intensives actuellement pratiquées ne permettent pas de produire économiquement des animaux de grande taiJJe dont la qualité de chair est optimale. L'entreprise « Les viviers de la Castillonne » maîtrise...
Tipo: Text
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00119/23007/20837.pdf

Hydrosedimentological processes and soils of the barito estuary (south-kalimantan, indonesia)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bassoullet, Philippe; Djuwansah, R; Gouleau, D; Marius, C.
A pluridisciplinary study was carried out in the south-eastern part of Kalimantan (Indonesia) in a deltaic area close to Banjarmasin town. Upstream from Banjarmasin, Barito river divides into two branches, one of which meets the Kapuas river slightly further to the west, to form the Kapuas Murung estuary. This programme is designed to increase knowledge about the physical and sedimentological processes, physical and chemical properties of the soils, and hydrological and chemical parameters of the Barito estuary. Barito estuary was chosen for two main reasons. First, it constitutes an important waterway for the region, on which Banjarmasin harbour is located; second, the management of the sparsely occupied coastal areas is becoming a priority. The...
Tipo: Text
Ano: 1986
URL: http://archimer.ifremer.fr/doc/00110/22110/19748.pdf

Effect of environmental and nutritional factors on growth and azaspiracid production of the dinoflagellate Azadinium spinosum
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Jauffrais, Thierry; Sechet, Veronique; Herrenknecht, Christine; Truquet, Philippe; Savar, Veronique; Tillmann, Urban; Hess, Philipp.
Azadinium spinosum, a small dinoflagellate isolated from the North Sea, is a producer of azaspiracids (AZAs), a group of biotoxins associated with human illness following ingestion of contaminated shellfish. Using batch and continuous cultures of A. spinosum, the present study investigated the effects of different environmental and nutritional factors (salinity, temperature, photon flux density, aeration, culture media, nitrogen sources, phosphate source, and N/P ratios) on growth, maximum cell concentration, and AZA cell quota.  Azadinium spinosum grew in a wide range of conditions; from 10 ̊C to 26 ̊C and salinities from 30 to 40, under irradiances ranging from 50 μmol m−2 s−1 to 250 μmol m−2 s−1, with or without aeration. Growth and maximum cell...
Tipo: Text
Palavras-chave: AZA; Chemostat; Dinophyceae; Nutrients; N/P ratio; Photobioreactor.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00149/26054/24411.pdf

Contribution a l'etude de la biologie du crabe-tourteau Cancer pagurus sur les cotes de Bretagne sud.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Foll, Anne.
The study of the crab Cancer pagurus , along the Brittany coast, has revealed new information about its movements, growth and reproduction. The 1439 crab tagging has been effected either on land using the Edwards technique "suture-tag" or onboard using a similar technique to the Gundersen method of "toggle-tag". The results confirm that males are relatively sedentary, the females migrate more. To estimate growth, the author used the "capture-recapture" method and the results from crab rearing. It appeared that the molt increment is not constant and generally, so the molt frequency, it percentage decreases when the size increases.
Tipo: Text
Palavras-chave: Marine crustaceans; Sexual reproduction; Tagging; Growth; Migrations.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/publication-1785.pdf

Pets at ecotourism destinations: cute mascot or trojan horse?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bessa, Eduardo; Blumstein, Daniel T.; Samia, Diogo S. M.; Geffroy, Benjamin.
Alien species are threatening native fauna worldwide and cats and dogs have well-documented deleterious impacts on wildlife. Ecotourism operators often live and raise their pets in natural reserves. Here we discuss how pets add to the list of potential negative impacts of ecotourism and provide recommendations to control or attenuate such impacts.
Tipo: Text
Palavras-chave: Cat; Conservation; Dog; Invasive species; Tourism.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00505/61642/65655.pdf

Life cycle, dynamics, and production of Echinogammarus marinus (Leach (Amphipoda)) in the Mondego Estuary (Portugal)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Marques, J C; Nogueira, A.
A benthic sampling programme was carried out in 1985/1986, in winter and summer, in order to characterize the intertidal community structure in the Mondego Estuary (Portugal). Echinogammarus marinus (Amphipoda, Gammaridae) was considered a key species in the algal-covered areas, and was particularly associated with Fucus spp. A study of its life cycle, population dynamics and production was therefore carried out. The results reinforce the generalized notion that estuaries are highly productive systems, and reflect the important role of Amphipods in the productivity of habitats colonized by them.
Tipo: Text
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00268/37877/35958.pdf

Tidal-induced pulses in the flow through the Strait of Gibraltar
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: La Violette, Pe; Lacombe, H.
Ship data collected in the 1960s and recent data from ship, aircraft and satellites indicate that the flow in the Strait of Gibraltar does not move in the form of continuous currents but as tidal-induced pulses. A descriptive model based on these data is presented. The model indicates that the pulses are a result of increases in the speed of the tidal streams as they encounter the constrictions of the regional bathymetry (especially the Camarinal Sill and between the Camarinal Sill and Tarifa). Periodic increases modify the regional flow so that during each tidal cycle, the eastward-flowing surface Atlantic water and westward-flowing deep Mediterranean water are alternately emitted as large pulses into the Mediterranean Sea (Atlantic water) and Atlantic...
Tipo: Text
Ano: 1988
URL: http://archimer.ifremer.fr/doc/00267/37794/35875.pdf

Rapport d’activités 2015. Laboratoire Santé Environnement et Microbiologie. Laboratoire National de Référence de Microbiologie des coquillages
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Garry, Pascal; Le Saux, Jean-claude; Hervio Heath, Dominique; Le Guyader, Soizick.
La Microbiologie sanitaire, thème de recherche fédérant notre laboratoire, nous a permis d’obtenir des résultats intéressants qui sont présentés dans ce rapport et ont été valorisés par des publications ou la participation des membres de l’équipe à des congrès scientifiques. Cette thématique nous permet surtout des collaborations variées au travers des projets de recherche portés par l’équipe. L’élargissement de nos activités en intégrant la coordination REMI constitue un point important à souligner complétant nos actions de référence, d’expertise et de recherche. L’attrait et l’intérêt scientifique suscité par la microbiologie sanitaire a été démontré par le succès rencontré par le colloque organisé à Brest en lien avec la fin du projet européen...
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00380/49138/49574.pdf

La tectonique des plaques
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Pichon, Xavier.
The plate tectonic hypothesis admits that the orogenic areas, where most of the mechanical energy vanishes, are the areas where the differential horizontal motions between rigid lithospheric plates occur. The success of this hypothesis relies on the fact that the aseismic deformations inside the plates are less important than the motions occurring along the seismic areas. The rigidity of the plates enables a rigorous analysis of their kinematic. This quantitative model of the evolution of the Earth is an incredible revolution in earth science. It leads to a series of new scientific processes and research involving every different field belonging to earth science.
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1970
URL: http://archimer.ifremer.fr/doc/1970/publication-4887.pdf

CGFS 2018 - Survey Report
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Coppin, Franck; Le Roy, Didier; Goascoz, Nicolas; Travers-trolet, Morgane.
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00491/60248/63651.pdf

Considerations generales sur l'oceanographie physique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lacombe, H.
This introduction to the Colloquium recalls some of the outstanding features of the physical oceanography of the Mediterranean. On the basis of what is known concerning the budget of transfers and exchanges across the sea-surface and their impact on the hydrographical characters of the waters and their movements, and concerning the external conditions imposed on the sea, the author presents, the effect of the constraints imposed on the sea due to the existence of straits with sills and, primarily, the Strait of Gibraltar.
Tipo: Text
Ano: 1988
URL: http://archimer.ifremer.fr/doc/00267/37792/35873.pdf

Monthly HPLC measurements of pigment concentration from an intertidal muddy sediment of Marennes-Oléron Bay, France
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cariou-le Gall, Valerie; Blanchard, Gerard.
Chloropigments and carotenoids were measured by HPLC in an intertidal muddy sediment of Marennes-Oleron Bay (France). Concentrations were determined as a function of sediment depth at low tide. The analyses were carried out at monthly intervals over 1 yr. Pigment analysis indicated that the microphytobenthic community was dominated by diatoms throughout the sampling year. Chlorophyll b was not encountered at any time or depth, indicating that no input from macrophytic detritus had occurred at the sampling site. There was a large pool of phaeopigments a, of which phaeophorbides were the major forms (75%). A microphytobenthic bloom occurred between March and June during which phaeopigments significantly increased with a high proportion of phaeophorbides...
Tipo: Text
Palavras-chave: Pigment; HPLC; Intertidal mudflat; Microphytobenthos; Seasonal change.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00257/36844/36666.pdf

Ressources démersales et descriptions des pêcheries des bancs de Saint-Martin et Saint-Barthélémy
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lorance, Pascal.
Une évaluation de la variabilité du phénomène ciguatérique est réalisée et montre qu'aucune cartographie précise des zones ciguatériques n'est possible à cette échelle. Le rejet systématique des espèces à «risques» reste la méthode la plus sûre pour éviter des intoxications, mais il ne peut être exclus que quelques poissons appartenant à des espèces présumécs saines s'avèrent toxiques. Les rendements obtenus au cours de ces trois séries de campagnes de pêche sont présentés dans ce document ainsi que les résultats des tests comparatifs des secteurs et des saisons (sèche et humide). Une description des captures (composition spécifique, distribution des fréquences de taille des principales espèces) donne des indices qualitatifs d'une exploitation modérée sur...
Tipo: Text
Palavras-chave: Pêcherie démersale; Captures; Rendements; Antilles; Saint-Martin; Saint-Barthélémy; Ciguatera.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00419/53029/53963.pdf

Accumulation and depuration of hydrocarbons in the mangrove oyster Crassostrea rhizophorae
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Delcastillo, C; Corredor, J; Morell, J.
Adult specimens of Crassostrea rhizophorae were exposed to diesel oil dispersed in seawater. The experiment consisted of a 10 days contamination period and 15 days depuration period. Oyster samples were extracted, and analysed by gas chromatography and UV fluorescence spectroscopy. The concentrations of n-alkanes, branched alkanes, unresolved complex mixture (UCM) and aromatic hydrocarbons were determined. The oysters accumulated the hydrocarbons rapidly, reaching a maximum concentration of 387.5 ug/g (wet weight). After exposure to uncontaminated seawater, the oysters were able to reduce their hydrocarbon load to 5.6 ug/g. The data indicates that C. rhizophorae is capable of preferential accumulation and depuration of hydrocarbons. Apparently, the oysters...
Tipo: Text
Palavras-chave: Crassostrea rhizophorae; Bivalvia; Fluorescence spectroscopy; Gas chromatography; Oyster culture; Hydrocarbons; Marine pollution; Accumulation; Self purification.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-1602.pdf

Year-to-Year changes in meteorological features of the french coast area during the last half-century - examples of 2 biological responses
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fromentin, Jean-marc; Ibanez, F.
Chronological series (1949 to 1992) of air temperature, precipitation, atmospheric pressure and wind in different parts of the French coast show evidence of important year-to-year changes, trends and cycles: seven-eight years for temperature, and around three years for precipitation and atmospheric pressure. On the scale of France, it appears that spatial heterogeneity of meteorological factors is smaller than temporal heterogeneity. New methods, such as the cumulative sums method or the envelopes of a variable reveal the interest for ecologists of essaying different numerical approaches. A comparison between climatic series and biological series of a benthic and a pelagic species is described for this purpose.
Tipo: Text
Palavras-chave: METEOROLOGICAL SERIES; BIOLOGICAL SERIES; TRENDS; CYCLES; CHANGES.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00098/20891/18505.pdf

Mesure densimétrique de la salinité. Table donnant la salinité en fonction de la densité et de la température
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Leroy, C.; Cadiou, Yvon; Delaporte, Francis.
Parmi les méthodes physiques ou chimiques pérmettant de mesurer la salinité de l'eau de mer, la densité est certainement la plus simple et surtout celle qui ne nécessite pas un appareillage coûteux puisqu'il suffit de disposer d'un aréomètre, d'un thermomètre et d'une éprouvette (coût entre 160 et 300 F.,selon la précision désirée). Cette méthode est peu précise mais, dans bien des cas, elle peut suffire, notamment lorsqu'on désire obtenir la salinité avec une précision comprise entre l'unité et la première décimale. La table qui suit a été établie dans ce but et il conviendra, si on désire une précision plus grande, d'utiliser une autre méthode : chlorinité ou conductivité électrique.
Tipo: Text
Ano: 1977
URL: http://archimer.ifremer.fr/doc/00046/15766/13168.pdf

The Impact of Wind Gusts on the Ocean Thermal Skin Layer
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Zappa, Christopher J.; Laxague, Nathan J.m.; Brumer, Sophia; Anderson, Steven P.
The thermodynamic and emissive properties of the ocean thermal skin layer are crucial contributors to air‐sea heat flux. In order to properly observe ocean surface temperature without disturbing any delicate fluid mechanical processes, thermal infrared imaging is often used. However, wind impacting the ocean surface complicates the extraction of meaningful information from thermal imagery; this is especially true for transient forcing phenomena such as wind gusts. Here, we describe wind gust‐water surface interaction through its impact on skin layer thermal and emissive properties. Two key physical processes are identified: (1) the growth of centimeter‐scale wind waves, which increases interfacial emissivity and (2) microscale wave breaking and shear,...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00514/62522/66831.pdf

Ninth Workshop on the Development of Quantitative Assessment Methodologies based on LIFE-history traits, exploitation characteristics, and other relevant parameters for data-limited stocks (WKLIFE IX).
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ICES.
The Workshop on the Development of Quantitative Assessment Methodologies based on Life-history traits, exploitation characteristics, and other relevant parameters for data-limited stocks (WKLIFE) focuses on the provision of sound advice rules for data-limited stock (DLS) assess-ments that are within the ICES MSY framework. This ninth workshop was convened to further address the challenges to the evidence base for the provision of ICES advice with specific refer-ence to DLS. The reviewers’ report of WKLIFE VIII (ICES, 2018) was used as the basis to draft ICES technical guidance on advice rules for stocks in Categories 3 and 4 following the meeting in 2018. The draft document reflected the conclusions of the WKLIFE VIII meeting report but in order to provide...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00593/70530/68675.pdf

Depuration of copper nitrate and chloride in the Indian brown mussel Perna indica
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kondajii, N; Menon, N.
It is understood that the rate of bioaccumulation and subsequent depuration of heavy metals in marine animals is influenced by the chemical state, as well as the kinetics of transformation between different species of chemical salts dissolved in water. The Indian Brown mussel, Perna indica, was exposed to copper nitrate and chloride, individually, to analyse the rate of accumulation, depuration, oxygen uptake and filtration rates. When supplied in very low quantities, environmentally realistic concentrations, the rate of accumulation of copper nitrate and chlorides showed variations. When the animals were transferred to sea water, these two salts did not show any clear cut differences in the depuration rate. Irrespective of the previous accumulation...
Tipo: Text
Palavras-chave: Perna indica; Bivalvia; Chlorides; Copper; Mussel culture; Heavy metals; Marine pollution; Accumulation; Self purification.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-1603.pdf

Contribution of Meat Inspection to the surveillance of poultry health and welfare in the European Union
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Huneau-salaun, A.; Staerk, K. D. C.; Mateus, A.; Lupo, Coralie; Lindberg, A.; Le Bouquin-leneveu, S.
In the European Union, Meat Inspection (MI) aims to protect public health by ensuring that minimal hazardous material enters in the food chain. It also contributes to the detection and monitoring of animal diseases and welfare problems but its utility for animal surveillance has been assessed partially for some diseases only. Using the example of poultry production, we propose a complete assessment of MI as a health surveillance system. MI allows a long-term syndromic surveillance of poultry health but its contribution is lowered by a lack of data standardization, analysis and reporting. In addition, the probability of case detection for 20 diseases and welfare conditions was quantified using a scenario tree modelling approach, with input data based on...
Tipo: Text
Palavras-chave: Animal welfare; Disease surveillance; Meat Inspection; Poultry.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00273/38472/37200.pdf

Deriving blue ling abundance indices from industry haul by haul data
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lorance, Pascal; Pawlowski, Lionel; Trenkel, Verena.
A database of tallybooks, from skippers' own logbooks, provided by the French industry involved in deep-water fishing to the west of the British Isles was used to standardise blue ling Landings per Unit of Effort (LPUEs). The data covered the years 1992-2008 with more extensive data for the period 2000-2007. For each haul, landings by species, tow duration, depth and location were reported. Compared to EU logbooks, this database is on a haul by haul basis instead of being aggregated by fishing sub-trips combining hauls from the same day, ICES rectangle and gear. Moreover, it includes depth, which is a major factor for catch rates in deepwater fisheries. LPUEs were estimated from Generalised Additive Models (GAMs) with depth, vessel, statistical rectangle...
Tipo: Text
Palavras-chave: Molva dypterygia; Abundance indices; Fishing strategy; Tweedie distribution.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00102/21330/18953.pdf

Responses and adaptations of the adenylate energy charge and digestive enzyme activities to tidal emersion of Crassostrea gigas populations in Marennes-Oleron Bay
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Moal, Jeanne; Samain, Jean-francois; Le Coz, Jean-rene; Daniel, Jean-yves.
Crassostrea gigas oysters cultivated in Marennes-Oleron Bay (France), face seasonal variations in the environment: salinity, turbidity, phytoplanktonic production, and the tidal rhythm of emersion. The oysters are maintained at different depths to reduce competition for space (e.g. by settlement of mussel spat). The physiological responses of two groups of oysters to different periods of emersion were studied using a seasonal sampling strategy: one group was on a flat part of the area, and the effect of emersion was studied in a short time survey (less than three hours emersion at low tide); the other was located in a very narrow place with a steep slope. This group was subdivided into three, according to bathymetric position, to study the long term effect...
Tipo: Text
Palavras-chave: Crassostrea gigas; Physiology; Emersion; AEC; Digestive enzimes; Marennes-Oleron Bay.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00038/14885/12208.pdf

Les arrangements institutionnels et la gouvernance de l'eau douce en zone côtière : le cas du bassin versant de la Charente
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Marcone, Océane.
The water - management within the watershed of the Charente is problematic due to the different uses made by different user groups, and because of its relative scarcity, especially during summertime. The over exploitation of the water for farrning activities poses a problem, in particular from the environmental point of view. The shellfish activity suffers from the scarcity of fresh water in the basin of Marennes - Oléron too.   The various needs of water inherent in the different practices lead to use conflicts. To improve water management, the govemment had set up various management tools. Thought problems remain. lnstitutional economics seems to be a pertinent framework to understand what are the misses and the progresses of the current management...
Tipo: Text
Palavras-chave: Gouvernance de l'eau douce; Arrangements institutionnels; Bassin versant de la Charente; Conflits d'usage; Action collective; Fresh water governance; Institutional arrangements; Watershed of the Charente; Uses conflicts; Collective action.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00441/55276/56769.pdf

Use of otolith-shape analysis for stock discrimination of Boops boops along the Algerian coast (southwestern Mediterranean Sea)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ider, D.; Ramdane, Z.; Mahe, Kelig; Dufour, Jean-louis; Bacha, M.; Amara, R.
Otolith-shape analysis was examined to determine its utility for biological stock identification of the bogue Boops boops along the Algerian coast of the Mediterranean Sea. The outlines of 179 sagittal otolith pairs from fish collected at three locations (Oran, Bejaia and Annaba) between 2013 and 2016 were digitised and analysed for shape variation by elliptical Fourier analysis. Potential confounding sources of variation (fish length, age and sex, and left or right otolith position) were examined and accounted for in the analyses before interpretation of spatial differences in distribution of the stock. Redundancy analysis showed a significant difference between the left and right otoliths. No difference was correlated with sex and age, but fish length...
Tipo: Text
Palavras-chave: Biological stocks; Elliptical Fourier analysis; Image analysis; Linear discriminant analysis; Marine fish; Principal components analysis; Sex differences.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00409/52075/52855.pdf

Improvement in airsea flux estimates derived from satellite observations
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bentamy, Abderrahim; Grodsky, Semyon A.; Katsaros, Kristina; Mestas-nunez, Alberto M.; Blanke, Bruno; Desbiolles, Fabien.
A new method is developed to estimate daily turbulent airsea fluxes over the global ocean on a 0.25 degrees grid. The required surface wind speed (w(10)) and specific air humidity (q(10)) at 10m height are both estimated from remotely sensed measurements. w(10) is obtained from the SeaWinds scatterometer on board the QuikSCAT satellite. A new empirical model relating brightness temperatures (T-b) from the Special Sensor Microwave Imager (SSM/I) and q(10) is developed. It is an extension of the author's previous q(10) model. In addition to T-b, the empirical model includes sea surface temperature (SST) and airsea temperature difference data. The calibration of the new empirical q(10) model utilizes q(10) from the latest version of the National Oceanography...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00137/24825/23575.pdf

Overview of the First SMOS Sea Surface Salinity Products. Part I: Quality Assessment for the Second Half of 2010
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Reul, Nicolas; Tenerelli, Joseph; Boutin, Jaqueline; Chapron, Bertrand; Paul, Frederic; Brion, Emilie; Gaillard, Fabienne; Archer, Olivier.
Multi-angular images of the brightness temperature (TB) of the Earth at 1.4 GHz are reconstructed from the Soil Moisture and Ocean Salinity (SMOS) satellite sensor data since end 2009. Sea surface salinity (SSS) products remote sensing from space is being attempted using these data over the world oceans. The quality of the first version of the European Space Agency operational Level 2 (L2) SSS swath products is assessed in this paper, using satellite/in situ SSS data match-ups that were collected over the second half of 2010. This database reveals that 95% of the SMOS L2 products show a global error standard deviation on the order of ∼1.3 practical salinity scale. Simple spatiotemporal aggregation of the L2 products to generate monthly SSS maps at 1◦ × 1◦...
Tipo: Text
Palavras-chave: L-band; Microwave radiometry; Ocean salinity; Sea surface.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00072/18313/16109.pdf

Body size-density relationship for Mytilus edulis in an experimental food-regulated situation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Alunno-bruscia, Marianne; Petraitis, P; Bourget, E; Frechette, Marcel.
We grew mussels (Mytilus edulis) under two different food regimes and eight population density levels to estimate the joint effects of density and biomass on their growth and survival and to determine the shape of the biomass-density (B-IV) relationship. Mussels were reared for 22 months, between December 1994 and October 1996, in 1-L experimental chambers supplied with natural seston. Growth in shell length, individual wet mass and ash free dry mass (m) decreased with decreasing food availability and increasing population density. Survival was negatively correlated with density but did not differ significantly between food regimes during the first year. Variations in concentration of available food did not alter the effects of crowding on mussels, as...
Tipo: Text
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-6791.pdf

Organisation, structure et dynamique de peuplements macrobenthiques d' une table conchylicole de l'étang de Thau (Hérault, France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lamy, Nathalie.
L'étude des peuplements macrobenthiques d'une table d'élevage conchylicole de l'étang de Thau (Méditerranée) s'inscrit dans le cadre du programme de recherches OXYTHAU-PNOC. Elle concerne les peuplements de substrat meuble, situés sous et au voisinage de la table, mais également ceux de substrat dur, associés aux mollusques d'élevage et à leur supports. Les substrats meubles ont été échantillonnés en février 1991 et en mai 1992. Les peuplements de substrat dur ont été étudiés par colonisation de surfaces collectrices vierges et suivis sur une période de 19 mois, d'avril 1992 à novembre 1993. La table d'élevage accueille des peuplements riches (jusqu'à 146 espèces sur les substrats durs) et assez diversifiés (l'indice de Shannon est de l'ordre de 2 à 4 bits...
Tipo: Text
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00073/18447/15987.pdf

La pêche au vivaneau en Guyane française
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Prevost, Etienne.
Traditionally fished by line and conical fishing basket by Venezuelan ships, the red snapper resource off the coast of French Guyana (fish belonging to the Lutjanidae family) has been experiencing intensive fishing since 1984-85 due to the boom in classic fishing techniques and the development of trawl fishing.  The study evaluates the situation of this resource's potential: biology, sampling data, bio-statistics (size and sex), size-weight relationship of the three species, specific composition of the catches, describes fishing devices and prospecting, pinpoints fishing spots, gives a distribution of the Venezuelan and Martinique fishing effort.
Tipo: Text
Palavras-chave: Bow net; Trawl; Fishing line; Franch Guyana; Lutjanidae; Guyane; Chalut; Nasse; Ligne; Engin de pêche; Lutjanidae; Vivaneau.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/rapport-2646.pdf

Connectivity and population structure of albacore tuna across southeast Atlantic and southwest Indian Oceans inferred from multidisciplinary methodology
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Nikolic, Natacha; Montes, Iratxe; Lalire, Maxime; Puech, Alexis; Bodin, Nathalie; Arnaud-haond, Sophie; Kerwath, Sven; Corse, Emmanuel; Gaspar, Philippe; Hollanda, Stéphanie; Bourjea, Jerome; West, Wendy; Bonhommeau, Sylvain.
Albacore tuna (Thunnus alalunga) is an important target of tuna fisheries in the Atlantic and Indian Oceans. The commercial catch of albacore is the highest globally among all temperate tuna species, contributing around 6% in weight to global tuna catches over the last decade. The accurate assessment and management of this heavily exploited resource requires a robust understanding of the species’ biology and of the pattern of connectivity among oceanic regions, yet Indian Ocean albacore population dynamics remain poorly understood and its level of connectivity with the Atlantic Ocean population is uncertain. We analysed morphometrics and genetics of albacore (n = 1,874) in the southwest Indian (SWIO) and southeast Atlantic (SEAO) Oceans to investigate the...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00653/76483/77555.pdf

Grossissement de la crevette impériale dans les marais de l'Atlantique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hatt, Philippe-jacques.
La famille des Pénéides comprend plus de 200 espèces réparties plus particulièrement dans les mers chaudes et tempérées. P. japonicus est très répandue au Japon, en particulier sur la côte Pacifique et méridionale. Elle est fréquente le long des côtes de Chine et de Corée. On la trouve à l'état endémique sur les côte de l'Afrique de l'Est, de la Mer Rouge, des golfes d'Alexandrie, d'Arabie et du Bengale, de l'archipel indonésien, du Nord-Est de l'Australie et des Iles Fidji. Elle a été introduite artificiellement dans le bassin méditerranéen et sur la côte atlantique, où des pêcheurs signalent leur présence exceptionnelle.
Tipo: Text
Ano: 1991
URL: https://archimer.ifremer.fr/doc/00509/62114/66307.pdf

Estimation par spectrofluométrie des concentrations d'hydrocarbures dans l'eau de mer en Manche Occidentale à la suite du naufrage de l"AMOCO CADIZ" du 30 mars au 18 avril 1978
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Marchand, Michel.
The oil .pollution,resulting from the "AMOCO CADIZ" tanker spill on the Brittany coast of North Finistere-has affected a very large section of the western Channel, limited for the period covering March 30 to April 18 to the west by the 5°W meridian, to the east by the St-Brieuc Bay, to the north by the 49°20' parallel. The contents of hydrocarbons observed in sea water at different levels show that the whole of water column is contaminated by hy­drocarbons and indicate very probably the pollution of the sedimentary phase in the areas, hited by the drifting sheets.
Tipo: Text
Palavras-chave: Amoco Cadiz; Hydrocarbures; Eau de mer; Spectrofluorométrie; Manche; Amoco Cadiz; Sea-water; Spectrofluorometry; English Channel.
Ano: 1978
URL: http://archimer.ifremer.fr/doc/00306/41717/40928.pdf

Modeling the global fishmeal and fish oil markets
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mullon, C.; Mittaine, J-f.; Thebaud, Olivier; Peron, G.; Merino, G.; Barange, M.
P&gt;To explore the drivers of change in the complex system relating small pelagic fisheries and fishmeal/fish oil markets, to identify the interactions between these drivers and their overall impacts, we propose a bio-economic model, coupling the ecological and the economic dynamics of these global commodities. The model enables an analysis of the consequences of both global and local changes in the environment of production systems. Through sensitivity analysis of specific input parameters, we evaluate the robustness of the overall system to such changes and show that local responses of production systems and markets cannot be considered in isolation from the set of interactions at global level.
Tipo: Text
Palavras-chave: Fish oil; Fishmeal; Small pelagic fisheries; Networks economics; Bio economic modeling.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6938.pdf

Observing mixed layer depth, nitrate and chlorophyll concentrations in the northwestern Mediterranean: A combined satellite and NO  3  profiling floats experiment
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: D'Ortenzio, Fabrizio; Lavigne, Heloise; Besson, Florent; Claustre, Herve; Coppola, Laurent; Garcia, Nicole; Laes-huon, Agathe; Le Reste, Serge; Malarde, Damien; Migon, Christophe; Morin, Pascal; Mortier, Laurent; Poteau, Antoine; Prieur, Louis; Raimbault, Patrick; Testor, Pierre.
Two profiling floats, equipped with nitrate concentration sensors were deployed in the northwestern Mediterranean from summer 2012 to summer 2013. Satellite ocean color data were extracted to evaluate surface chlorophyll concentration at float locations. Time series of mixed layer depths and nitrate and chlorophyll concentrations were analyzed to characterize the interplay between the physical-chemical and biological dynamics in the area. Deep convection (mixed layer depth &gt; 1000 m) was observed in January–February, although high-nitrate surface concentrations could be already observed in December. Chlorophyll increase is observed since December, although high values were observed only in March. The early nitrate availability in subsurface layers, which...
Tipo: Text
Palavras-chave: Bio-Argo; Mediterranean; Mixed layer; Bloom onset; Nitrate concentration; Ocean color satellite.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00211/32225/30673.pdf

Report of the Benthos Ecology Working Group (BEWG), 8–12 May 2017, Gdynia, Poland
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ICES.
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00588/69974/67880.pdf

Cryogenian evolution of stigmasteroid biosynthesis
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hoshino, Yosuke; Poshibaeva, Aleksandra; Meredith, William; Snape, Colin; Poshibaev, Vladimir; Versteegh, Gerard J. M.; Kuznetsov, Nikolay; Leider, Arne; Van Maldegem, Lennart; Neumann, Mareike; Naeher, Sebastian; Moczydlowska, Malgorzata; Brocks, Jochen J.; Jarrett, Amber J. M.; Tang, Qing; Xiao, Shuhai; Mckirdy, David; Das, Supriyo Kumar; Alvaro, Jose Javier; Sansjofre, Pierre; Hallmann, Christian.
Sedimentary hydrocarbon remnants of eukaryotic C-26-C-30 sterols can be used to reconstruct early algal evolution. Enhanced C-29 sterol abundances provide algal cellmembranes a density advantage in large temperature fluctuations. Here, we combined a literature review with new analyses to generate a comprehensive inventory of unambiguously syngenetic steranes in Neoproterozoic rocks. Our results show that the capacity for C-29 24ethyl- sterol biosynthesis emerged in the Cryogenian, that is, between 720 and 635 million years ago during the Neoproterozoic Snowball Earth glaciations, which were an evolutionary stimulant, not a bottleneck. This biochemical innovation heralded the rise of green algae to global dominance of marine ecosystems and highlights the...
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00638/75021/75667.pdf

Working Group on the Assessment of Demersal Stocks in the North Sea and Skagerrak (WGNSSK).
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ICES.
The main terms of reference for the The ICES Working Group for the Assessment of Demersal Stocks in the North Sea and Skagerrak (WGNSSK) were: to update, quality check and report relevant data for the working group, to update and audit the assessment and forecasts of the stocks, to produce a first draft of the advice on the fish stocks and to prepare planning for bench-marks in future years.. Ecosystem changes have been analytically considered in the assessments for cod, haddock and whiting in the form of varying natural mortalities estimated by the ICES Working Group on Multi Species Assessment Methods (WGSAM). Benchmarks and Inter-benchmarks in 2018/2019 No full benchmarks were conducted during 2019 for WGNSSK stocks. However, there were sev-eral...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00600/71167/69500.pdf

Effects of age and environment on the summer mortality in cupped oyster Crassostrea gigas during the first two years
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Degremont, Lionel; Boudry, Pierre; Soletchnik, Patrick; Bedier, Edouard; Ropert, Michel; Samain, Jean-francois.
Three successive generations were produced between 2001 and 2003 to assess to what extent genetic variability exists for survival in juvenile oysters Crassostrea gigas. For each generation, two groups were selected for their high ("R" for resistant) and low ("S" for susceptible) survival. Significant differences in mortality were observed during the first year in Riviere d'Auray (RA) (Brittany-France). However, low and similar mortality were observed for both groups, with no significant difference between groups in the first and second generation in this site, where the first summer is the critical, sensitive period with a clear age effect. In Baie des Veys (BDV) (Normandie-France), where mortalities usually mainly affect adults, mortality between groups,...
Tipo: Text
Palavras-chave: Crassostrea gigas; Spat; Spatial variations; Survival; Rearing; Mollusc culture; Marine molluscs; Environmental factors; Nursery grounds; Mortality causes; Biological age; Aquaculture techniques.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/acte-3385.pdf

Contrasting the flavors of El Nino-Southern Oscillation using sea surface salinity observations
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Singh, Awnesh; Delcroix, Thierry; Cravatte, Sophie.
The recent detection of a central Pacific type of El Nino has added a new dimension to the El Nino-Southern Oscillation climatic puzzle. Sea surface salinity (SSS) observations collected during 1977-2008 in the tropical Pacific are used to contrast the three eastern Pacific (EP) (1982-1983, 1991-1992, 1997-1998) and seven central Pacific (CP) (1977-1978, 1986-1988, 1990-1991, 1992-1995, 2002-2003, 2004-2005, 2006-2007) types of El Nino events, as well as the six EP (1985-1986, 1988-1989, 1995-1996, 1999-2001, 2005-2006, 2007-2008) and two CP (1983-1984, 1998-1999) types of La Nina events. The EP El Nino events result in large (similar to 30 degrees longitude) eastward displacements of the eastern edge of the low-salinity warm pool waters in the equatorial...
Tipo: Text
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00213/32452/30915.pdf

Identification de polymorphismes de gènes chez l'huître plate Ostrea edulis L. et variabilité au sein de populations européennes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chupeau, Gaelle.
Le but de ce travail était de rechercher des marqueurs non neutres afin de comparer ces données obtenues avec celles données par les marqueurs précédemment étudiés (marqueurs neutres ou supposés l'être à savoir microsatellites, enzymatique et mitochondriales). Dû à des soucis d'ADN extrait des populations qui avaient été étudiées jusqu'alors, il a fallu effectuer un nouvel échantillonnage de l'huître plate Européenne, Ostrea edulis, sur son aire de répartition. Nous avons donc analysé en plus du but majeur, les données microsatellites pour ces nouvelles populations de manière à avoir un jeu de données de marqueurs non neutres. Ces analyses ont ainsi complété l'arbre phylogénétique déjà existant, et ont confirmé dans une moindre mesure puisque tous les...
Tipo: Text
Palavras-chave: Huître plate; Ostrea edulis; Génétique des populations; Nucleotide Polymorphisme (SNP); Test de neutralisté; Microsatellites.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/00033/14417/11712.pdf

Detection of microseismic compressional (P) body waves aided by numerical modeling of oceanic noise sources
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Obrebski, Mathias; Ardhuin, Fabrice; Stutzmann, Eleonore; Schimmel, Martin.
Among the different types of waves embedded in seismic noise, body waves present appealing properties but are still challenging to extract. Here we first validate recent improvements in numerical modeling of microseismic compressional (P) body waves and then show how this tool allows fast detection and location of their sources. We compute sources at similar to 0.2 Hz within typical P teleseismic distances (30-90 degrees) from the Southern California Seismic Network and analyze the most significant discrete sources. The locations and relative strengths of the computed sources are validated by the good agreement with beam-forming analysis. These 54 noise sources exhibit a highly heterogeneous distribution, and cluster along the usual storm tracks in the...
Tipo: Text
Palavras-chave: Compressionnal body waves; Noise source; Double frequency microseism; Numerical modeling.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00161/27251/25448.pdf

Contaminations microbiologiques des parcs mytilicoles en Baie de l'Aiguillon: étude des apports en micro-organismes du bassin versant du Lay
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Peythieu, Sebastien.
L'activité mytilicole dans la baie de l'Aiguillon est aujourd'hui menacée par les dégradations de la qualité microbiologique de l'eau. A certaines périodes de l'année, on assiste à des pics de contamination des moules. Celles-ci doivent être dans ces conditions purifiées avant d'être commercialisées. Les mytiliculteurs de la région qui ont investi dans des navires ateliers ne disposent pas d'établissements à terre pour pratiquer cette purification. La profession mytilicole réclame en vertu des lois sur la protection de l'eau et de l'environnement, une amélioration de la qualité de l'eau qui arrive aux estuaires. Un travail visant à une meilleure connaissance de ces phénomènes de contamination microbiologique est nécessaire et servira de base préliminaire à...
Tipo: Text
Palavras-chave: Contamination microbiologique; Mytiliculture; Baie Aiguillon; Département Charente-Maritime; Transfert micro-organismes; Contrôle sanitaire.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00048/15962/13402.pdf

Rapport d'activité 1998 du Laboratoire Côtier de La Tremblade
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kantin, Roger.
Rapport d'activité 1998 du Laboratoire Côtier de La Tremblade
Tipo: Text
Palavras-chave: Environnement; Réseaux surveillance; Bactériologie; Microbiologie; Rapport activité.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00071/18260/15823.pdf

Biological effects of the "Erika" oil spill on the common mussel (Mytilus edulis)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bocquene, Gilles; Chantereau, Sebastien; Clerendeau, Christelle; Beausir, Emilie; Menard, Dominique; Raffin, Bernard; Minier, Christophe; Burgeot, Thierry; Leszkowicz, Annie Pfohl; Narbonne, Jean-françois.
A 3-year survey was made of several biological markers in mussels (Mytilus edulis) exposed in situ to the oil that came ashore after the wreck of the "Erika" tanker on the Brittany (France) coast in December 1999. The mussel response was assessed using a set of 7 biomarkers, most of them related to the metabolism of organic contaminants. After a series of validation tests, data was evaluated for only 5 biomarkers: acety1cholinesterase (AChE), glutathione S-transferase (GST), catalase (CAT), malondialdehyde (MDA) and deoxyribonucleic acid (DNA) adducts. No significant reductions in GST or CAT levels were observed, levels of DNA adducts and MDA were high during the 6 months immediately following the accident and levels of AChE were significantly lower during...
Tipo: Text
Palavras-chave: Mytilus edulis; Mussel; Biomarkers; Monitoring; Survey; PAH; Polycyclic aromatic hydrocarbon; Oil spill.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-403.pdf

Integrated Study of Southern Ocean Biogeochemistry and Climate Interactions in the Anthropocene “BELCANTO III”
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dehairs, F; Cavagna, Aj; Jacquet, S; Mangion, P; Woulé Eboungoué, V; Navez, J; Lancelot, C; Becquevort, S; Schoemann, V; Naithani, J; Dumont, I; Masson, F; André, L; Cardinal, D; Fripiat, F; Goosse, H; De Montety, A; Vancoppenolle, M; Borges, A; Delille, B.
he overall objective of the BELCANTO III project was to conduct targeted process studies and develop new proxies to construct and validate a realistic 3D ice-ocean biogeochemical model for the area south of latitude 30°S, based on improved understanding of the different factors regulating interactions between the atmosphere, ocean circulation and biogeochemical cycles and on synthesis/collection of existing/new data sets. The specific objectives were: - to improve our understanding about the iron cycling, with focus on the significance of iron-organic matter interactions for iron bioavailability and the efficiency of the biological pump (WP1) - to quantify nutrient consumption, CO2 uptake and C-export by assessing seasonality and interannuality of nutrient...
Tipo: Text
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00651/76346/77336.pdf

Paramunna foliacea sp. n., isopode abyssal de l'atlantique tropical
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chardy, Pierre.
A sample taken on the Guinean abyssal plain during the Walda 2 cruise of the R.S. "Jean Charcot", included 3 specimens of an isopod crustacean belonging to the genus Paramunna G.O. Sars, 1866. As these specimens could not be linked to any of the species known to this genus, we had to create a new species, described in this note.
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1975
URL: http://archimer.ifremer.fr/doc/1975/publication-5422.pdf

Relations entre Sarpa salpa (Linnaeus, 1758) (Téléostéen, Sparidae), les autres poissons brouteurs et le phytobenthos algal méditérranéen
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Verlaque, M.
Tipo: Text
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00131/24256/22249.pdf

Statistique des pêches maritimes - Année 1955
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Tipo: Text
Ano: 1957
URL: http://archimer.ifremer.fr/doc/00163/27390/25619.pdf

Reviews and syntheses: An empirical spatiotemporal description of the global surface-atmosphere carbon fluxes: opportunities and data limitations
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Zscheischler, Jakob; Mahecha, Miguel D.; Avitabile, Valerio; Calle, Leonardo; Carvalhais, Nuno; Ciais, Philippe; Gans, Fabian; Gruber, Nicolas; Hartmann, Jens; Herold, Martin; Ichii, Kazuhito; Jung, Martin; Landschuetzer, Peter; Laruelle, Goulven G.; Lauerwald, Ronny; Papale, Dario; Peylin, Philippe; Poulter, Benjamin; Ray, Deepak; Regnier, Pierre; Roedenbeck, Christian; Roman-cuesta, Rosa M.; Schwalm, Christopher; Tramontana, Gianluca; Tyukavina, Alexandra; Valentini, Riccardo; Van Der Werf, Guido; West, Tristram O.; Wolf, Julie E.; Reichstein, Markus.
Understanding the global carbon (C) cycle is of crucial importance to map current and future climate dynamics relative to global environmental change. A full characterization of C cycling requires detailed information on spatiotemporal patterns of surface-atmosphere fluxes. However, relevant C cycle observations are highly variable in their coverage and reporting standards. Especially problematic is the lack of integration of the carbon dioxide (CO2) exchange of the ocean, inland freshwaters and the land surface with the atmosphere. Here we adopt a data-driven approach to synthesize a wide range of observation-based spatially explicit surface-atmosphere CO2 fluxes from 2001 to 2010, to identify the state of today's observational opportunities and data...
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00661/77322/78795.pdf

The influence of the environment on the variability of monthly tuna biomass around a moored, fish-aggregating device
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Doray, Mathieu; Petitgas, Pierre; Nelson, Laetitia; Mahevas, Stephanie; Josse, E; Reynal, Lionel.
Fish-aggregating devices (FADs) are increasingly used worldwide to enhance tuna catches. Meanwhile, ecosystem-based management of this fishery is constrained by a paucity of information regarding the interaction of FAD-associated tuna aggregations with their local environment. This paper reports the results of a nine-month study around a FAD moored near Martinique Island, aimed at assessing the effects of the local environment on the variability of monthly estimates of proximate tuna biomass. Dual-frequency, active acoustics provided highresolution quantitative data on the pelagic community around the FAD, from fish to micronekton forage. Geostatistics were used to compute biomass estimates of the tuna aggregation comprising most of the FADassociated fish...
Tipo: Text
Palavras-chave: Lesser Antilles; Tuna; Environment; Geostatistics; Biomass estimation; Fish aggregating device.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2008/publication-6162.pdf

Growth of the common Cockle Cerastoderma edule : Validation of the periodicity of increment deposition by Calcein marker
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bellamy, Elise; Mahe, Kelig; De Rafelis, Marc; Lartaud, Franck.
Cockle (Cerastoderma edule) growth has not been studied a lot yet and the current approach of counting external ridges in order to make age estimation is limited. Nevertheless, growth is a key parameter for monitoring bivalves populations, which are heavily exploited in French estuaries. The Bay of Somme which is located in the eastern Channel in the north of France, is the first French field of cockles (Cerastoderma edule). In order to improve stock management, it is necessary to increase our knowledge of this species. This study is looking at the growth of the common cockle.  In this way, recapture of shells previously marked under calcein marker and then breed in natural conditions in the Bay of Somme, was performed in order to determine the shell...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00011/12268/9053.pdf

Combined Fishing and Climate Forcing in the Southern Benguela Upwelling Ecosystem: An End-to-End Modelling Approach Reveals Dampened Effects
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Travers-trolet, Morgane; Shin, Yunne-jai; Shannon, Lynne J.; Moloney, Coleen L.; Field, John G.
The effects of climate and fishing on marine ecosystems have usually been studied separately, but their interactions make ecosystem dynamics difficult to understand and predict. Of particular interest to management, the potential synergism or antagonism between fishing pressure and climate forcing is analysed in this paper, using an end-to-end ecosystem model of the southern Benguela ecosystem, built from coupling hydrodynamic, biogeochemical and multispecies fish models (ROMS-N2P2Z2D2-OSMOSE). Scenarios of different intensities of upwelling-favourable wind stress combined with scenarios of fishing top-predator fish were tested. Analyses of isolated drivers show that the bottom-up effect of the climate forcing propagates up the food chain whereas the...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00186/29741/28166.pdf

Report of the Working Group on Mixed Fisheries Advice Methodology (WGMIXFISH-METH), 10-14 October 2016
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ICES.
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00587/69940/67846.pdf

Hydrology and circulation in the Strait of Hormuz and the Gulf of Oman - Results from the GOGP99 experiment: 2. Gulf of Oman - art. no. C12038
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pous, Stephane; Carton, Xavier; Lazure, Pascal.
Hydrological, ADCP, and drifting buoy data obtained during the GOGP99 Experiment in October and early November 1999 are analyzed to describe the Persian Gulf Water (PGW) core and the regional circulation in the Gulf of Oman. The warm and salty PGW core flows out of the Strait of Hormuz heading southeastward unto (25degrees20'N, 57degreesE), approximately. From there, it cascades down the continental slope, veers southwestward, and joins the Omani coast near (24degrees50'N, 56degrees50'E) to form a slope current. This PGW current has then thermohaline maxima on isopycnal sigma(0) = 26.5, near 220 m depth. Its thermohaline characteristics decrease along its progression to Ra's al Hadd ( and then offshore into the Arabian Sea) but maintain a sharp contrast...
Tipo: Text
Palavras-chave: Persian Gulf Water outflow; Regional circulation; Gulf of Oman.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-390.pdf

A Red Shrimp, Farfantepenaeus brasiliensis (Latreille, 1817), Larvae Feeding Regime Based on Live Food
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gaxiola, Gabriela; Gallardo, Pedro; Simoes, Nuno; Cuzon, Gerard.
Red shrimp, Farfantepenaeus brasiliensis, larvae's response to different concentrations of live foods (diatoms Chaetoceros gracilis: 20-100 x 103 cells/mL; flagellate Tetraselmis chuii: 2-10 x 103 cells/mL and Artemia nauplii [NA]: 1-5 NA/mL) was investigated in three experiments. Experimental assessments were based on four variables: survival rate, weight gain, development index (DI), and resistance to salinity stress. A combination of C. gracilis 80 x 103 cells/mL, T. chuii 2 x 103 cells/mL, and Artemia 4 NA/mL provided the best experimental response. Specifically, F. brasiliensis larvae fed with the above-mentioned optimal concentrations of microalgae and Artemia grew faster and reached the postlarval stage in less time (168 h) than larvae in other...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00028/13928/11639.pdf

Expérimentation RINBIO 2011. Suivi de la cinétique de contamination chimique de moules (Mytillus galloprovincialis): Synthèse des mesures de contaminants chimiques dans l'eau.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gonzalez, Jean-louis; Bouchoucha, Marc; Chiffoleau, Jean-francois; Andral, Bruno.
Une des exploitations possibles des données acquises dans le cadre du réseau RINBIO est d'évaluer la concentration sous forme "biodisponible" de différents contaminants chimiques présents dans la colonne d'eau. Afin d'étudier cette possibilité, une expérimentation été conduite en parallèle sur trois sites en 2011 (baie du Lazaret, cap Cepet et baie de Calvi). Dans ces sites, des moules ont été "transplantées" et des mesures de la concentration de différents contaminants chimiques dans la colonne d'eau ont été réalisées. Le présent rapport traite plus spécifiquement des données concernant l'évolution temporelle des concentrations en métaux traces et composés hydrophobes mesurées pour les trois sites ateliers : par DGT (Diffusive Gradient in Thin film) et...
Tipo: Text
Palavras-chave: RINBIO; Contaminants chimiques; Métaux traces; Contaminants hydrophobes; Moules; Échantillonneurs passifs; DGT; SBSE.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00357/46855/46743.pdf

Modélisation de l'emprise BAST - Modèle 100m de la région de BASTIA. Document I : Construction du modèle aspects opérationnels
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gerigny, Olivia; Coudray, Sylvain.
Document descriptif de la construction du modèle hydrodynamique des eaux de la méditerranée autour de la Région de Bastia (Haute-Corse).
Tipo: Text
Palavras-chave: Modélisation; MARS3D; BASTIA; CORSE; Hydrodynamique.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00154/26489/24598.pdf

Observations globales des vents et des vagues de surface de l'océan à l'aide de mesures de radars à synthèse d'ouverture spatiaux
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Huimin, Li.
Spaceborne synthetic aperture radar (SAR) has been demonstrated invaluable in observing the global ocean winds and waves. SAR images acquired by multiple sensors are employed, including Sentinel-1(S-1), Envisat/ASAR, Gaofen-3 and Radarsat-2. This thesis reviews the commonly used SAR parameters (NRCS and azimuth cutoff) in the first part. A series of calibration steps are required to obtain a proper NRCS and assessment of NRCS is carried out for S-1wave mode (WV). It turns out that WV is poorly calibrated and is thus re-calibrated to obtain accurate NRCS. Azimuth cut off is demonstrated to be complementary to NRCS and can account for the sea state impact on the wind retrieval. Based on the available fully polarimetric SAR products, azimuth cut off is found...
Tipo: Text
Palavras-chave: Radar à synthèse d'ouverture; Vents et vagues océaniques; Synthetic aperture radar; Ocean winds; Ocean waves.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00504/61575/65505.pdf

Phylogenetic position and taxonomy of Cycloseris explanulata and C. wellsi (Scleractinia: Fungiidae): lost mushroom corals find their way home
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Benzoni, Francesca; Arrigoni, Roberto; Stefani, Fabrizio; Reijnen, Bastian T.; Montano, Simone; Hoeksema, Bert W.
The scleractinian species Psammocora explanulata and Coscinaraea wellsi were originally classified in the family Siderastreidae, but in a recent morpho-molecular study it appeared that they are more closely related to each other and to the Fungiidae than to any siderastreid taxon. A subsequent morpho-molecular study of the Fungiidae provided new insights regarding the phylogenetic relationships within that family. In the present study existing molecular data sets of both families were analyzed jointly with those of new specimens and sequences of P. explanulata and C. wellsi. The results indicate that both species actually belong to the Cycloseris clade within the family Fungiidae. A reappraisal of their morphologic characters based on museum specimens and...
Tipo: Text
Palavras-chave: COI; Coscinaraea wellsi; Psammocora explanulata; RDNA.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00145/25580/23718.pdf

The Black Sea - an energy crossroads and/or an unconventional energy and resource center in Europe
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dimitrov, D; Dimitrov, P; Peychev, V.
Tipo: Text
Ano: 2010
URL: https://archimer.ifremer.fr/doc/00503/61469/65245.pdf

Application du modèle MARS-3D à la rade de Toulon. Comparaison à des données historiques
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tessier, Caroline.
Développé par le laboratoire DEL/AO à Brest et appliqué à la rade de Toulon, le modèle MARS-3D a été installé au laboratoire de Toulon. L'objectif est de mettre en route son application à Toulon et de contribuer à l'analyse en cours des résultats du modèle, en les· comparant aux mesures historiques. Dans ce rapport sont présentés les travaux faits pour réaliser ce double objectif: l'apprentissage du modèle dans sa conception et son utilisation, l'analyse des résultats et la comparaison avec des mesures ainsi qu'une simulation de traceurs. La comparaison du modèle avec les données a été réalisée sur la base des enregistrements faits en 1986-1987 en un point de mesure au centre de la grande rade. Or, l'emboîtement des modèles crée une contrainte sur le...
Tipo: Text
Palavras-chave: Modèle; Tridimensionnel; Méditerranée; Hydrodynamique; Validation; Toulon.
Ano: 2001
URL: https://archimer.ifremer.fr/doc/00431/54248/59141.pdf

Mapping mesoscale variability of the azores current using TOPEX/POSEIDON and ERS 1 altimetry, together with hydrographic and Lagrangian measurements
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hernandez, Francisco; Le Traon, Pierre-yves; Morrow, R.
The SEMAPHORE mesoscale air/sea experiment was conducted in the Azores-Madeira region from July to November 1993. TOPEX/POSEIDON (T/P) and ERS 1 were flying simultaneously at that time. The main purposes of this paper are to evaluate the estimation of the oceanic mesoscale circulation from the two different sets of altimetric data (T/P and ERS 1) and to compare the results with in situ measurements provided by the SEMAPHORE hydrographic surveys and surface drifters (three expendable bathytermograph conductivity-temperature-depth surveys in a 500-km(2) box and a set of 47 Lagrangian surface drifters drogued at 150 m). Comparisons are carried out through the maps obtained by objective analysis from the four data sets. The mapping accuracy of T/P, ERS 1, T/P...
Tipo: Text
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00079/18978/16624.pdf

Moyens mis en oeuvre pour la cartographie du plateau continental - Guide général
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rollet, Claire; Breton, Cecile; Loubrieu, Benoit; Satra Le Bris, Catherine.
Sur le plateau continental, du littoral jusqu’aux fonds atteignant une profondeur de plus 200 m, une multitude de données océanographiques est recueillie à partir d’une grande diversité de moyens. Ces moyens, souvent mis en œuvre de façon complémentaire, font appel à des technologies et à des expertises variées. Ce document présente les différentes technologies mise en œuvre pour la cartographie du plateau continental. Il introduit une série de guides, chacun étant dédié spécifiquement à une technique de la cartographie numérique.
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00071/18237/15801.pdf

Validating age-determination of anglerfish and hake
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Brophy, Deidre (coord.).
Reliable measures of fish length-at-age are needed to estimate the biological reference points used in fish stock assessment. These data are usually obtained by counting and measuring seasonal growth marks in otoliths or other calcified structures for a representative sample of the population. For anglerfish (Lophius spp.) and hake (Merluccius merluccius) in the Northeast Atlantic, traditional age-estimation methods are unreliable. The assessments for these stocks are based on survey indices or are length-based and require accurate information on length-at-age. Without this information, accurate assessments and the estimation of MSY reference points are problematic. For some other species, objective methods of age-determination have been developed using...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00692/80442/83615.pdf

Évaluation du potentiel halieutique de la Zone Économique Exclusive française en 2050
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Garric, Sarah.
Le changement global menace la productivité des stocks des organismes marins et la durabilité les pêcheries associées. L'objectif des Nation Unies pour le développement durable de l’Océan (ODD14) a pour but de restaurer durablement la santé et la productivité des écosystèmes marins soumis à de multiples pressions anthropiques, et notamment au dérèglement du climat, à la surpêche, à la pollution et à la destruction des habitats. Les modèles et scénarios prospectifs permettent d’ informer le public et les décideurs sur les trajectoires possibles de nos sociétés, dans le contexte du changement global. Des scénarios d’évolution de l’approvisionnement en nourriture et autres produits issus de l’agriculture et de la sylviculture ont ainsi été proposés à...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00512/62328/66587.pdf

Pêche côtière et gouvernance (France). Le cas d’étude de la pêcherie de la moule de pêche de l’Est Cotentin. Rapport d'étude. Projet GIFS. Action 1
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Picault, David; Lesueur, Marie; Noel, Julien; Lepetit, Audrey; Nys, Cecile; Pellan, Cécile; Trougan, Mélissa; Rezgani, Wafa; Souidi, Safa.
Ce rapport s’insère dans l’activité 1 du projet GIFS « Gouvernance des zones côtières et des pêches maritimes » ayant pour objectifs : * De comprendre les différents modes de gouvernance côtière de la zone d’étude et identifier les pratiques de gestion. * D’inventorier et comprendre les approches et les cadres de gestion existants dans l’ensemble de la zone d’étude et identifier la place de la pêche maritime dans ces derniers.
Tipo: Text
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00500/61203/64749.pdf

Eléments de synthèse tirés du séminaire : propositions de stratégies pour mieux concilier aménagement et maintien d'un fonctionnement naturel des estuaires
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Auger, Christian.
The national work seminary on the natural and artificial evolution of French estuaries was organised on the 26th and 27th of November 1997 by the GIP Hydrosystems and the Ministry of Land Settlement and Environment. Its aim was to summarize the needs of the different actors and users of the French estuaries in terms of protection of the areas of biological interest, and to develop a guideline for the strategies to adopt in order to better manage the estuaries, taking into account the environmental needs as well as those for an economic development.
Tipo: Text
Palavras-chave: Sustainable management; Administration; Action plans; Environment; Improvement; Protection; Areas of ecological interest; Estuaries; Gestion durable; Administration; Plans d'action; Environnement; Aménagements; Protection; Zones d'intérêt écologique; Estuaires.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/1997/acte-3293.pdf

Rapport d'activité année 1977 du Laboratoire de Biologie Conchylicole de La Rochelle
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dardignac, Marie-jose.
Rapport d'activité du Laboratoire de Biologie Conchylicole de La Rochelle concernant l'année 1977
Tipo: Text
Palavras-chave: Conchyliculture; Reproduction; Estimation stocks; Valorisation claires ostréicoles; Parasite; Pathologie; Crassostrea gigas; Mytilus edulis; Pertuis Breton.
Ano: 1977
URL: http://archimer.ifremer.fr/doc/00070/18092/15640.pdf

Taxonomic revision of Coralliidae with descriptions of new species from New Caledonia and the Hawaiian Archipelago
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tu, Tzu-hsuan; Dai, Chang-feng; Jeng, Ming-shiou.
The systematics of Coralliidae has been revised based on molecular phylogenetic analysis and detailed morphological studies. This revision has also revealed the existence of new species. In order to fully accomplish this revision, five new species including Hemicorallium aurantiacum sp. nov., Pleurocorallium bonsaiarborum sp. nov., P. clavatum sp. nov., and P. norfolkicum sp. nov. from New Caledonia, and H. guttatum sp. nov. from the Hawaiian Archipelago are described by integrating the phylogenetic inference and morphological comparisons. Moreover, the type specimens of Corallium tortuosum, H. reginae, H. halmaheirense, P. porcellanum and P. kishinouyei as well as non-type specimens of C. stylasteroides are redescribed. The sclerites of H. reginae, H....
Tipo: Text
Palavras-chave: Coralliidae; New species; New Caledonia; The Hawaiian Archipelago; Multiple factors analysis.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00362/47279/47240.pdf

Zones réglementaires de l'Atlantique et de la Méditerranée. Secteurs statistiques de Méditerranée
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Roy, Didier; Rouyer, Armelle; Le Roy, Emilie.
Le SIH, Système d'Informations Haliteutiques, édite des cartes des secteurs de pêche. Les secteurs règlementaires sont complétés par ceux du référentiel des secteurs de l'Ifremer.
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00627/73943/73292.pdf

Rejets urbains et contamination fecale
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pommepuy, Monique; Dupray, Elisabeth; Guillaud, Jean-francois; Derrien, A; L'Yavanc, Jacky; Cormier, M.
The behaviour of fecal bacteria was investigated in a turbid estuary which is also a shellfishing area. Sediments are polluted by sewage by the way of settlement, fecal bacteria mixed with estuarine water being able to survive a very long time (T90 are about several days). By measuring the increase of salt tolerance of the strains grown in natural estuarine organic matter, it was demonstrated that Escherichia coli is able to support the salinity of coastal water. Moreover, because light penetration is obstructed by suspended matter, the solar bactericidal effect is very low. A close relationship between T90 and light intensity received by the bacteria is found. These mechanisms can explain the low die-off rate found in turbid areas.
Tipo: Text
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00267/37860/35941.pdf

First results of a geophysical survey on the northern flank of the Storegga. slides (Norway).
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Nouze, Herve; Contrucci, Isabelle; Foucher, Jean-paul; Marsset, Bruno; Thomas, Yannick; Thereau, Estelle; Normand, Alain; Le Drezen, Eliane; Didailler, Stephane; Regnault, Jean-pierre; Le Conte, Sandie; Guidart, Stéphanie; Lekens, Win; Dean, Simon; Throo, Alexandre.
The Storegga slides, off Norway, are among the largest submarine slides ever known on a continental slope. The HYDRATECH cruise on N/O Le Suro (i) over capt aimed at a high-resolution survey of an area at the northern boundary of the slides. This survey images in great detail the bottom simulating reflector (BSR) extent and properties, the various fluid escape structures and the sediment deformations. The combination and the quality of the data help to understand the still poorly constrained relationships between fluid escapes, gas hydrates and slope stability in the survey area.
Tipo: Text
Palavras-chave: Slope stability; Fluid escapes; Gas hydrates; Storegga.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-511.pdf

Étude de la sensibilité thermique des larves du crustacé décapode : Palaemon Serratus
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Maggi, Pierre; Lassus, Patrick.
Les travaux présentés ici ont trait à une partie d'une étude générale menée dans les laboratoires de l'I.S.T.P.M. (Nantes) afin de tenter de prévoir les effets engendrés par l'implantation de centrales nucléaires sur le littoral de l'Atlantique et de la Manche.
Tipo: Text
Ano: 1980
URL: http://archimer.ifremer.fr/doc/00046/15745/13147.pdf

L'éventail sous-marin profond du Rhône (Golfe du Lion) : grands traits morphologiques et structure semi-profonde
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Droz, Laurence.
L'éventail sous-marin profond du Petit-Rhône constitue la majeure partie du glacis du Golfe du Lion (Méditerranée nord-occidentale). Approximativement 1200 km de profils bathymétriques (12 kHz) et environ 3500 km de profils de sismique réflexion continue haute résolution en ont permis une étude détaillée. Les résultats combinés de l'analyse morphologique et sismique ont permis de mettre en évidence la structuration de l'édifice, le mode d'organisation de ses sédiments, et de montrer que leur mise en place s'est effectuée sous des régimes, et donc par des processus hydrodynamiques, variant au cours du temps.
Tipo: Text
Ano: 1983
URL: http://archimer.ifremer.fr/doc/00042/15327/12663.pdf

Larval rearing and weaning of seabass, Lates calcarifer (Block), on experimental compounded diets
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fuchs, Jacques; Nedelec, Georges.
Larval rearing trials of seabass larvae, either imported from Singapore or obtained from the captive broodstock of IFREMER/C.O.P. at Tahiti, were carried out since 1987, by testing different technologies originally used in South East Asia (green-water culture, sequential water changes) or developed by IFREMER for other species (clear water system, preys enrichment, continuous water renewal).
Tipo: Text
Palavras-chave: Lates calcarifer; Diets; Survival; Fish larvae; Brood stocks; Mortality; Pellet feeds; Artificial feeding; Swimming; Abnormalities; Swim bladder; Growth.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1433.pdf

Use of satellite image products to understand variation in fish length: Anchovy in the Bay of Biscay
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Petitgas, Pierre; Gohin, Francis; Duhamel, Erwan; Doray, Mathieu; Schmidt, Jörn; Voss, Rudiger.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00590/70202/68229.pdf

Models and indicators for assessing conservation and fisheries-related effects of marine protected areas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pelletier, Dominique; Claudet, Joachim; Ferraris, J; Benedetti Cecchi, L; Garcia Charton, J.
Two kinds of approaches have been used for assessing conservation and fisheries-related effects of marine protected areas (MPAs): (i) statistical modelling based on field data and (ii) mathematical modelling quantifying the consequences of MPAs on the dynamics of populations, communities, and fisheries. Statistical models provide a diagnostic on the impact of MPAs on the ecosystem and resources; they are also needed for devising and assessing sampling designs for monitoring programs. Dynamic models enable exploration of the consequences of MPA designs and other management policies. We briefly review how each of these approaches has been implemented up to now in the literature and identify potential indicators of MPA effects that can be obtained from each...
Tipo: Text
Palavras-chave: Ecosystem conservation; Fisheries management; Modelling; Indicators; Marine Protected Areas.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4229.pdf

Use of an ecosystem model for the assessment of the influence of cultivated oysters (Crassostrea gigas) on the nitrogen cycling in the Marennes-Oleron Bay
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bacher, Cedric.
A model of the growth of cultivated oyster in the Marennes-Oléron bay was developped to assess the influence of the nutrients input and of the amount of oysters on the growth performance (Railiard. 1991). The ecosystem main characteristics are: - short residence time of the water. - high turbidity level, depending on the season, tidal level, bathymetry, currents and wind. The turbidity acts on the primary production through light limitation and on oyster production as a food dilution factor. - presence of high density cultivated areas on mid-tidal flats. The amount of oysters is ranging between 80 000 and 110 000 tons according to the year. - spatial variability of the biological and physical features. - coupling effects of the physic process (transport,...
Tipo: Text
Palavras-chave: Ecosystem model; Oyster; Crassostrea gigas; Nitrogen cycling; Marennes Oleron Bay; Charente Maritime.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00102/21300/18914.pdf

Toward in situ detection of algae species
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Colas, Florent; Laurent, Sebastien; Lehaitre, Michel; Hamelin, Muriel; Crassous, Marie-pierre; Antoine, Elisabeth; Dreanno, Catherine; Deuff, Albert; Compere, Chantal.
For the last few years there is a more and more pressing need to develop system for detecting HAB at their early stage. Researchers have then been working on new in situ sensor. In this paper a submarine transducer based on surface plasmon resonance is reported. It demonstrated a refractive index resolution of 3.10(-6), which is promising for later phytoplankton detection.
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00107/21802/20328.pdf

Analysis of gear interactions in a hake fishery: The case of the Gulf of Lions (NW Mediterranean)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Aldebert, Yvonne; Recasens, Laura; Lleonart, Jordi.
The hake of the Gulf of Lions is the most important target species of the demersal fishery. It is exploited by four types of gear (two trawls, gillnet and longline) used by two countries (France and Spain). Some analyses of its dynamics, based on 19 88 length frequency data by gear, have been performed. These analyses consisted in a VPA (Virtual Population Analysis). phis a Y/R (Yield per Recruit analysis) carried out on two parameter scenarios by sex, under a steady state hypothesis (with constant recruitment). Some estimates of biomass and exploitation level were obtained, and sensitivity to the biological parameters and interaction between types of gear were studied. As a main conclusion, it can be seen that the types of gear fishing mainly small...
Tipo: Text
Palavras-chave: Assessment; Gaar interaction; Hake; Gulf of Lions; NW Mediterranean.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00193/30430/28847.pdf

Which ocean colour algorithm for MERIS in North West European waters?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tilstone, Gavin; Mallor-hoya, Silvana; Gohin, Francis; Couto, Andre Belo; Sa, Carolina; Goela, Priscila; Cristina, Sonia; Airs, Ruth; Icely, John; Zuehlke, Marco; Groom, Steve.
Chlorophyll-a (Chl a) is a key parameter for the assessment of water quality in coastal and shelf environments. The availability of satellite ocean colour offers the potential of monitoring these regions at unprecedented spatial and temporal scales, as long as a high level of accuracy can be achieved. To use satellite derived Chl a to monitor these environments, it is imperative that rigorous accuracy assessments are undertaken to select the most accurate ocean colour algorithm(s).  To this end, the accuracy of a range of ocean colour Chl a algorithms for use with Medium Imaging Resolution Spectrometer (MERIS) Level 2 (L2) Remote Sensing Reflectance (Rrs), using two different atmospheric correction (AC) processors (COASTCOLOUR and MERIS Ground Segment...
Tipo: Text
Palavras-chave: Case 2 waters; Coastal waters; Shelf waters; Chlorophyll-a; North Sea; Ocean colour; Remote sensing; MERIS; English Channel; Mediterranean coast; Portuguese coast.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00359/46995/48634.pdf

Report of the Workshop on North Sea herring larvae surveys, data needs and execution (WKHERLARS2), 15-17 November 2016, IJmuiden, The Netherlands
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ICES.
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00586/69850/67745.pdf

French National Report on Argo - 2015. Present status and future plans
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Maze, Guillaume; Cabanes, Cecile; Carval, Thierry; Coatanoan, Christine; D'Ortenzio, Fabrizio; Kolodziejczyk, Nicolas; Lebreton, Nathanaele; Le Traon, Pierre-yves; Poffa, Noe; Pouliquen, Sylvie; Thierry, Virginie.
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00318/42967/42474.pdf

Biochemical composition of ovules and fecund eggs of sea-bass (Dicentrarchus labrax), sole, (Solea vulgaris) and turbot (Scophthalmus)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Devauchelle, Nicole; Brichon, G; Lamour, F; Stephan, G.
Tipo: Text
Ano: 1982
URL: http://archimer.ifremer.fr/doc/00048/15897/13323.pdf

Inventaire des sites favorables à l'aquaculture côté Atlantique de la Vilaine à la Bidassoa. Rapport de synthèse. Ile de Noirmoutier
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hussenot, Jerome.
Tipo: Text
Ano: 1974
URL: http://archimer.ifremer.fr/doc/00020/13125/10133.pdf

Mapping tuna occurrence under drifting fish aggregating devices from Fisher’s Echosounder buoys in Indian Ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Baidai, Yannick; Dagorn, Laurent; Amande, Mj; Gaertner, Daniel; Capello, Manuela.
Echosounder buoys data obtained from instrumented drifting FADs represent an unprecedented source of information for assessing the spatio-temporal distribution of tropical tuna. Using machine learning algorithms, we transformed acoustic data collected from one of the main echosounder buoys models used by the French purse seine fleet (M3I) into presence/absence of tuna aggregations, enabling the measurement of the amount of inhabited FADs on a given spatiotemporal strata. This paper presents the spatial and temporal distribution of the proportion of drifting fish aggregating devices (DFADs) occupied by tuna aggregations relative to the total number of FADs in the Indian Ocean on a monthly basis, on a 5° grid for year 2016. The perspectives opened up by this...
Tipo: Text
Palavras-chave: Echosounders; Drifting fish aggregating devices (FAD); Tropical tunas; Abundance.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00592/70454/68576.pdf

Indentation of the Philippine Sea plate by the Eurasia plate in Taiwan: Details from recent marine seismological experiments
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lallemand, Serge; Theunissen, Thomas; Schnurle, Philippe; Lee, Chao-shing; Liu, Char-shine; Font, Yvonne.
We analyze in this study a new set of marine data including 3D local tomography, 1992-2008 relocated earthquakes and two recent multichannel seismic lines to characterize the deformation style in the collision area offshore east Taiwan. We have mapped in detail the Mohos of the converging plates as well as the subduction interface with a resolution never reached before. We show that the sharp continental subduction of the Eurasia plate, beneath the middle part of the Central Range, indents the Philippine Sea plate (PSP) as attested by intra-oceanic slicing and incipient subduction of the PSP beneath the east coast of Taiwan. The westernmost part of the PSP slab is probably experiencing a beginning of break-off as attested by NW-trending en-echelon shear...
Tipo: Text
Palavras-chave: Arc-continent collision Local tomography Tear; Subduction Intra-oceanic slicing Slab break-off.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00149/26048/24164.pdf

Etude de la qualité d'une zone conchylicole Ouest-Cotentin 1990-1992 (entre le Havre de Regnéville et Granville)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer.
Des contrôles bactériologiques sont effectués régulièrement par l'IFREMER sur les zones conchylicoles exploitées (réf. 1) et par la Direction Départementale des Affaires Sanitaire et Sociale sur les plages et les gisements naturels (moules et coques), (cf. bibliographie). Les années à pluviosité forte ou normale (1985 à 1988), sur certaines zones, ces contrôles font état d'une qualité bactériologique fluctuante, souvent médiocre, voire, dans certains cas, non conforme avec la réglementation qui sera appliquée en 1993 par la Communauté Economique Européenne. Un réseau de surveillance de la qualité microbiologique des coquillages a été mis en place par l'IFREMER. li couvre entre autres, la côte ouest du Cotentin (fig. 1) ; si la qualité des coquillages des...
Tipo: Text
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00450/56187/57740.pdf

Optimisation de l’identification et du dénombrement du microphytoplancton avec le système couplé de numérisation et d’analyse d’images FlowCAM – Zoo/PhytoImage (système innovant). Action 9 – Livrable 3. Evolution du matériel de numérisation : prototype FastCAM et perspectives. Rapport final, février 2016
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Colas, Florent; Tardivel, Morgan; Evrard, Justine; Forest, Bertrand; Crassous, Marie-pierre; Lunven, Michel; Danielou, Marie-madeleine.
This deliverable contains all development work of the FastCAM, new tool for fast imaging of the phytoplankton, which took place in 2015. It consists of: One report of the FastCAM and its comparison with the FlowCAM presentation: The FlowCAM enables the digitalization of a sample of phytoplankton with X10 and X 4 magnifications. The first allows a better morphological description and therefore a higher taxonomic resolution but with a longer scan time (16 X). Thus, for routine analyses, only scanning at 4 X is possible. A considerable gain would be able to do an acquisition to the magnification 10 X with a time of analysis more short, comparable to 4 X. A fast flow imaging system has therefore developed in this sense. He was called FastCAM. The system is...
Tipo: Text
Palavras-chave: FlowCAM; FastCAM; Imagerie rapide; Phytoplancton; REPHY.; FlowCAM; FastCAM; Fast imaging; Phytoplankton; REPHY.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00363/47420/47425.pdf

Comparaison de la sélectivité entre trémails et chaluts à perche pour la sole
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Brabant, Jean-claude.
From the 1st of January 1998 new regulations on flounder fishing will make new minimum meshes compulsory: 100 mm for trammel nets and 80 mm for trawls. Upon first sight, fishing the same species with two different meshes sounds illogical. This report aims to compare the selectivity of these two different catching devices: beam trawls and trammel nets. This study answers a request from the DPMCM and should be part of the existing data. This approach enables the use of results already obtained regarding the selectivity of these two flounder fishing devices.
Tipo: Text
Ano: 1997
URL: http://archimer.ifremer.fr/doc/1997/rapport-3944.pdf

Historical fluctuations in spawning location of anchovy (Engraulis encrasicolus) and sardine (Sardina pilchardus) in the Bay of Biscay during 1967-73 and 2000-2004
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bellier, Edwige; Planque, Benjamin; Petitgas, Pierre.
The spatial extent of small pelagic fish spawning habitat is influenced by environmental factors and by the state of the adult population. In return, the configuration of spawning habitat affects recruitment and therefore the future structure of the adult population. Interannual changes in spatial patterns of spawning reflect variations in adult population structures and their environment. The present study describes the historical changes in the spatial distribution of spawning of anchovy (Engraulis encrasicolus) and sardine (Sardina pilchardus) in the Bay of Biscay during two periods: 1967-72 and 2000-2004. Using data from egg surveys conducted in spring, the spatial distributions of anchovy and sardine eggs are characterized by means of geostatistics....
Tipo: Text
Palavras-chave: Spawning habitat; Spatial patterns; Sardine; Long term changes; Bay of Biscay; Anchovy.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2179.pdf

Spatial and Seasonal Distributions of Frontal Activity over the French Continental Shelf in the Bay of Biscay
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Yelekci, Ozge; Charria, Guillaume; Capet, Xavier; Reverdin, Gilles; Sudre, Joel; Yahia, Hussein.
The frontal activity in coastal regions remains a research field where a large number of open questions needs to be addressed to quantify the potential impact of these processes on dependent systems (e.g. biogeochemical activity). Spatial and seasonal distributions of Sea Surface Temperature (SST) fronts (∼1-100 km) in the vicinity of main French rivers, Gironde and Loire, are explored over the continental shelf North of 45 °N in the Bay of Biscay. A high resolution (1 km spatial and daily temporal resolutions) dataset of 11 years' (2003 to 2013) remotely sensed SST by MODIS sensor onboard Aqua and Terra satellites has been investigated and compared with coastal numerical model experiments. The detection and characterization fronts with fluctuating...
Tipo: Text
Palavras-chave: Bay of Biscay; Fronts; Submesoscale; Satellite; Sea surface temperature; Singularity exponent.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00389/50013/50602.pdf

Test préliminaires de toxicité des effluents de la station d'épuration de La Tremblade sur l'huître creuse (Crassostrea gigas)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lagarde, Franck.
La conchyliculture est une activité importante dans le bassin de Marennes-Oléron. L'aquaculture extensive de l'huitre japonaise (Crassostrea gigas ) représente, avec 130 000 tonnes par an, la première ressource marine nationale (Héral, 1986) dont 40 % se fait dans ce bassin. Il est donc important de connaître et d'étudier l'ensemble des phénomènes du bassin.  Depuis 1970, on observe un ralentissement de la croissance des huîtres sur le bassin et une baisse de productivité sur certains bancs ostréicoles exploités tels que Ronce les Bains (25 % de mortalité en Juillet 1996 ) et le banc de Perquis (25 % de mortalité en Juillet 1996) (REMORA 1995). Depuis 1988, les élevages ostréicoles de Charente-Maritime subissent en périodes printanières et estivales, des...
Tipo: Text
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00305/41572/40780.pdf

Nutrient and phytoplankton distribution in the Loire River plume (Bay of Biscay, France) resolved by a new Fine Scale Sampler
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lunven, Michel; Guillaud, Jean-francois; Youenou, Agnes; Crassous, Marie-pierre; Berric, Roger; Le Gall, Erwan; Kerouel, Roger; Labry, Claire; Aminot, Alain.
A new Fine Scale Sampler (FSS) was designed and used in the Loire River plume (Bay of Biscay, France) in order to study phytoplankton distribution in highly stratified water columns. The FSS consists of a linear array of 15 sampling bottles, set horizontally at 20 cm intervals. Data acquired from the CTD and fluorescence probe of the FSS enable it to be precisely positioned at the depth of the highest density gradient or at the chlorophyll a maximum. The FSS made it possible to investigate fine scale vertical distribution of phytoplankton and relationships with water density, nutrient concentrations or light availability, for spring and summer conditions. Under spring conditions, the entire upper layer exhibited a dominant diatom population (Chaetoceros...
Tipo: Text
Palavras-chave: Plankton patchiness; Density discontinuity; Sampling; Thin layer; Nutrients; Phytoplankton.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-533.pdf

Global high-resolution monthly pCO(2) climatology for the coastal ocean derived from neural network interpolation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Laruelle, Goulven G.; Landschutzer, Peter; Gruber, Nicolas; Tison, Jean-louis; Delille, Bruno; Regnier, Pierre.
In spite of the recent strong increase in the number of measurements of the partial pressure of CO2 in the surface ocean (pCO(2)), the air-sea CO2 balance of the continental shelf seas remains poorly quantified. This is a consequence of these regions remaining strongly under-sampled in both time and space and of surface p CO2 exhibiting much higher temporal and spatial variability in these regions compared to the open ocean. Here, we use a modified version of a two-step artificial neural network method (SOM-FFN; Landschutzer et al., 2013) to interpolate the p CO2 data along the continental margins with a spatial resolution of 0.25 ffi and with monthly resolution from 1998 to 2015. The most important modifications compared to the original SOM-FFN method are...
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00662/77392/79004.pdf

Distribution, associated species and extent of biofouling “reefs” formed by the alien species Ficopomatus enigmaticus (Annelida, Polychaeta) in marinas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Charles, M.; Faillettaz, Robin; Desroy, Nicolas; Fournier, Jerome; Costil, Katherine.
Artificial structures in ports are commonly colonized by non-indigenous epifauna that tolerate high pollution levels. Bioconstructions built by alien species may offer sheltered microhabitats for motile (vagile) animals but biofouling often becomes detrimental to human activities. In this context, the present study provides an inventory of 1) the extent of biofouling related to the alien Polychaeta Ficopomatus enigmaticus on hard structures of marinas in Normandy, France, and 2) the biodiversity of sessile (attached) or vagile (motile) fauna associated with these “reefs”, including both native and alien species. Reefs built by F. enigmaticus were found in 6 out of 12 marinas with oligohaline-mesohaline waters. Significant differences in the total volume of...
Tipo: Text
Palavras-chave: Biofouling; Ficopomatus enigmaticus; Benthic communities; Alien species; Marinas; Normandy (France).
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00449/56052/57572.pdf

Ecosystemes benthiques profonds et chimiosynthese bacterienne: Sources hydrothermales et suintements
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Laubier, Lucien.
Hydrothermal communities of various species compositions have been described from the eastern and western Pacific and Atlantic. Brine and cold seeps and hydrocarbon seepages have been found off Florida, off the Oregon and Japanese subduction systems, on the Laurentian Fan, near Barbados, and off Louisiana. Biomasses range from 10 to 70 kg/m super(2), fresh weight. Basic microdistribution of species groups in aureoles centered around hydrothermal vents reveals different levels of adaptation to harsh physico-chemical conditions. Two groups of primary producers can be recognized: a highly efficient cool water group with large vestimentiferan tube worms and bivalves, and alvinellid polychaetes adapted to hot waters. Both groups are exploited by specific...
Tipo: Text
Palavras-chave: Bivalvia; Polychaeta; Bacteria; Symbionts; Biosynthesis; Chemosynthesis; Food webs; Biomass; Hydrocarbons; Ecosystems; Hydrothermal springs; Seepages; Brines; Benthic environment; Benthos.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/1990/acte-1171.pdf

Microstructures de coquilles larvaires de prosobranches au microscope électronique à balayage
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thiriot-qievreux, Catherine.
The observation of the planktonic larval shells of different species of Prosobranches is carried out with scanning electron microscopy (Cambridge, Stereoscan 4). The influence of different fixing agents (non-acetified) on the conservation state of larval shells is not really clear at low magnifications. On the contrary, at high magnifications, the results are clearly better after using an alcohol fixation or without any fixing agent at all. The morphological differences of the larval shells of four species of Philbertia: P. gracilis (Montagu), P. linearis (Montagu), P. leufroyi (Michaud) and P. purpurea (Montagu) are precised. The microstructure of the shells of Firoloida desmaresti Lesueur and Atlanta fusca Souleyet larvae is observed. Scanning electron...
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1972
URL: http://archimer.ifremer.fr/doc/1972/publication-5049.pdf

Acidification du milieu marin. Sous-région marine Méditerranée occidentale. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Goyet, Catherine.
Tipo: Text
Palavras-chave: Méditerranée; Milieu marin; Acidification; Carbone anthropique.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00330/44114/43685.pdf

Theoretical study of the effect of round straps on the selectivity in a diamond mesh cod-end
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Herrmann, B; Priour, Daniel; Krag, L.
FEMNET, a numerical tool based on the finite element method, was applied to estimate the shapes of various diamond-mesh cod-end designs during fishing. The only design differences rest in the use of round straps of different lengths, positions and numbers. The cod-end shape estimates were then entered in the selectivity simulation tool PRESEMO to simulate the selectivity processes of the various cod-end designs under the same varying fishing conditions. This enabled us to demonstrate how one or two round straps along the cod-end axis may change the selectivity of the cod-end compared with a reference cod-end, without round straps. We predict that in cod-end designs, which comply with the EU legislation, the 50% retention length (L50) may be reduced by up...
Tipo: Text
Palavras-chave: Catch weight; FEMNET; PRESEMO; Round straps; Cod end selectivity.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1870.pdf

Saisine 16-10494 : "Synthèses socio-économiques des flottilles françaises exploitant certains stocks halieutiques"
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gourguet, Sophie; Ruel, Camille; Biseau, Alain.
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00356/46671/46539.pdf

Dual-frequency ADCPs measuring turbidity
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Jourdin, Frederic; Tessier, Caroline; Le Hir, Pierre; Verney, Romaric; Lunven, Michel; Loyer, Sophie; Lusven, Andre; Filipot, Jean-francois; Lepesqueur, Jeremy.
A pair of self-contained acoustic Doppler current profilers (SC-ADCPs) operating with different frequencies were moored on a muddy sea bottom at about 20 m depth in the Bay of Vilaine off the French Atlantic coast. With their acoustic beams oriented upwards, the SC-ADCPs ensonified most of the water column. The results of several months of in situ recorded echo intensity data spanning 2 years (2003 to 2004) from the dual-frequency ADCPs are presented in this paper. The aim was to estimate suspended particle mass concentration and mean size. A concentration index CI is proposed for the estimation of particle concentration. Based on theory the CI-unlike the volume backscatter strength-does not depend on particle size. Compared with in situ optical data, the...
Tipo: Text
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00213/32427/30896.pdf

Experimental study of bathymetry generated turbulence on tidal turbine behaviour
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gaurier, Benoit; Ikhennicheu, Maria; Germain, Gregory; Druault, Philippe.
In high flow velocity areas like those suitable for tidal applications, turbulence intensity is high and flow variations may have a major impact on tidal turbine behaviour. A three-bladed horizontal axis turbine model (scale 1:20) is positioned in the wake of a square wall-mounted cylinder, representative of specific in situ bathymetric variation, to experimentally study these effects in a current flume tank. Local and global loads are acquired in synchronization with velocity measurements to study the turbine response to flow fluctuations. Velocity measurements need to be obtained close to the turbine, contrary to what is commonly considered, to properly correlate velocity and loads fluctuations. Results show that the loads phase average and their...
Tipo: Text
Palavras-chave: Turbulence; Experimental trials; Wall-mounted cylinder; PIV; LDV; Horizontal axis tidal turbine.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00628/73966/73325.pdf

Rapport annuel d'activité 1981 du Laboratoire Cultures Marines et Aménagement du Littoral de La Tremblade
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Heral, Maurice.
Rapport d'activité du Laboratoire Cultures Marines et Aménagement du Littoral de La Tremblade concernant l'année 1981
Tipo: Text
Palavras-chave: Conchyliculture; Production; Gisement naturel; Estimation stock; Production; Valorisation claires ostréicoles; Culture palourde; Sélection génétique; Crassostrea gigas; Ruditapes decussatus; Ruditapes philippinarum; Marennes Oléron.
Ano: 1981
URL: http://archimer.ifremer.fr/doc/00070/18119/15667.pdf

La pêche à la lumière en Atlantique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kurc, Georges.
Cet article fait suite à celui qui a été publié dans le n° 69/70 (1959) de "Science et Pêche". Il apporte des informations nouvelles et inédites sur les expériences entreprises depuis cette date, soit par l'ISTPM soit sous sa direction.
Tipo: Text
Ano: 1963
URL: http://archimer.ifremer.fr/doc/1963/publication-7059.pdf

Elemental composition of meso-zooplankton around the Crozet Islands (Southern Ocean) and their role in iron biogeochemistry
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Nedelec, Florence; Fielding, Sophie; Anderson, Thomas R.; Statham, Peter J.
Zooplankton take up trace metals either from the surrounding aquatic medium or from their food. Accumulated trace metal concentrations therefore vary with the bio-availability of the metal in seawater and in the diet, and with the physiology of the organisms (Rainbow, 2002). The Antarctic copepods Rhincalanus gigas, and Calanus sp. are herbivorous, and the amount of Fe assimilated by these grazers is affected by the iron status of their prey. In incubation experiments the Fe:C ratio of copepods was lower than their prey. This may be due to copepods having a lower iron demand than phytoplankton, or to iron not being efficiently assimilated (Schmidt et al., 1999). If iron is not assimilated efficiently and given that respiratory systems may require more iron...
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00086/19752/17394.pdf

Stock Assessment Form Demersal species. Red mullet - GSA7. Reference year: 1998-2016. Reporting year: 2017
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Jadaud, Angelique; Guijarro, Beatriz; Massuti, Enric.
In the Gulf of Lions (GSA 7), red mullet is exploited by both French and Spanish trawlers. Information on French gillnetters is only available for 2011 and 2013-2016, but although it is suspected that they have been fishing red mullet in the past, no data is available to quantify their catches. According to official statistics, during the first part of this period (2004-2012), the total annual landings have oscillated around an average value of 190 tons; since 2012, landings have shown a clear increasing trend. French trawlers dominate the fishery, as they represent 88% of the catches (average 201 tons) for the entire period. After 2009, because of the large decline of small pelagic fish species in the area, the trawlers fishing small pelagic have diverted...
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00423/53464/54359.pdf

Avis de l'Ifremer sur les conditions d'ouverture d'une zone de pêche au chalutage pélagique sur le plateau de Rochebonne pour la période du 1er décembre 2019 au 31 janvier 2020
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Biais, Gerard.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00585/69664/67527.pdf

Institutions et amenagement des pecheries au Maroc
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Troadec, Jean-paul.
Tipo: Text
Palavras-chave: SEM.
Ano: 1988
URL: http://archimer.ifremer.fr/doc/1988/rapport-2428.pdf

Influence des apports fluviatiles en Baie de Seine
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Avoine, J; Crevel, L.
Hydrological study of Seine Bay displays two areas differentiated by salinity distribution. One has marine characteristics and the other is under fluvial influence. In this paper the authors give the main results of exchanges between the environments, obtained by the study of water dilution, solid particles dispersion, and their contribution to sedimentation.
Tipo: Text
Palavras-chave: Estuarine front; River plumes; Trace metals; Salinity; Residual flow; Seasonal variations; Environmental effects; Sediment dynamics; Estuarine sedimentation; River discharge.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1275.pdf

Etude sanitaire microbiologique - Site de Kermeur sur la ria du Bélon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Monfort, Patrick.
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00023/13421/10433.pdf

Influence of Nutrient Stress on the Relationships between PAM Measurements and Carbon Incorporation in Four Phytoplankton Species
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Napoleon, Camille; Raimbault, Virginie; Claquin, Pascal.
Two methods of measuring primary production, modulated fluorimetry (PAM) and the traditional carbon incorporation method (C-13), were compared in four phytoplankton species, two diatoms (Pseudo-nitzschia pungens and Asterionellopsis glacialis), and two dinoflagellates (Heterocapsa sp and Karenia mikimotoi), under N (nitrogen), P (phosphorus) and Si (silicon) limited semi-continuous culture. N and Si-limited cultures showed relatively high quantum efficiency of the PSII (F-v/F-m) values, confirming that F-v/F-m is not a good proxy for nutrient stress in balanced systems, whereas P limitation had a drastic effect on many physiological parameters. In all species, the physiological capacity of phytoplankton cells to acclimate to nutrient limitations led to...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00152/26307/24383.pdf

Modelling seasonal dynamics of biomasses and nitrogen contents in a seagrass meadow (Zostera noltii Hornem.): application to the Thau lagoon (French Mediterranean coast)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Plus, Martin; Chapelle, Annie; Menesguen, Alain; Deslous-paoli, Jean-marc; Auby, Isabelle.
A numerical deterministic model for a seagrass ecosystem (Zostera noltii meadows) has been developed for the Thau lagoon. It involves both above- and belowground seagrass biomasses, nitrogen quotas and epiphytes. Driving variables are light intensity, wind speed, rain data and water temperature. This seagrass model has been coupled to another biological model in order to simulate the relative contributions of each primary producer to: (i) the total ecosystem production, (ii) the impact on inorganic nitrogen and (iii) the fluxes towards the detritus compartment. As a first step in the modelling of seagrass beds in the Thau lagoon, the model has a vertical structure based on four boxes (a water box on top of, three sediment boxes) and the horizontal...
Tipo: Text
Palavras-chave: Thau lagoon; Nitrogen cycle; Oxygen cycle; Box model; Seagrass ecosystem.
Ano: 2003
URL: https://archimer.ifremer.fr/doc/2003/publication-461.pdf

Atlantic-type continental margins:distinction of two basic structural types
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mascle, Jean.
Large areas of the Atlantic ocean continental margin do not fit with the classic atlantic type continental margin model in which only simple geometrical arrangements have been distinguished. A new structural type, related to marginal offsets and corresponding fracture ridges is fundamentally different from the classic margin. Consequently, it is proposed to distinguish the rifted atlantic-type margin, the pacific-type margin and the transform faulted or strike-slip margin as three different and fundamental types of continental margins. [NOT CONTROLLED OCR]
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1976
URL: http://archimer.ifremer.fr/doc/1976/publication-4987.pdf

Quartier maritime Bastia. 2019. Activité des navires de pêche.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d’Informations Halieutiques » (SIH) de l’Ifremer, qui constitue le réseau d’observation des ressources halieutiques et des usages associés. Ce projet s’inscrit dans la mission de service d’intérêt public de l’Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l’analyse du secteur des pêches, le SIH a en charge l’élaboration d’indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche et du grand public.
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00650/76223/77186.pdf

Influence de l’altitude d’élevage sur la survie du naissain d’huîtres creuses. Résultats issus d’observations et d’expérimentations (2009 et 2010) dans le bassin de Marennes Oléron
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Soletchnik, Patrick; Le Moine, Olivier; Robert, Stephane; Geairon, Philippe; Seugnet, Jean-luc.
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00442/55350/56863.pdf

Diverging patterns of introgression from Schistosoma bovis across S. haematobium African lineages
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rey, Olivier; Toulza, Eve; Chaparro, Cristian; Allienne, Jean-françois; Kincaid-smith, Julien; Mathieu-begné, Eglantine; Allan, Fiona; Rollinson, David; Webster, Bonnie L.; Boissier, Jérôme.
Hybridization is a fascinating evolutionary phenomenon that raises the question of how species maintain their integrity. Inter-species hybridization occurs between certain Schistosoma species that can cause important public health and veterinary issues. In particular hybrids between Schistosoma haematobium and S. bovis associated with humans and animals respectively are frequently identified in Africa. Recent genomic evidence indicates that some S. haematobium populations show signatures of genomic introgression from S. bovis. Here, we conducted a genomic comparative study and investigated the genomic relationships between S. haematobium, S. bovis and their hybrids using 19 isolates originating from a wide geographical range over Africa, including samples...
Tipo: Text
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00678/79020/81421.pdf

Long-term ammonia exposure of turbot: effects on plasma parameters
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Person, Jeannine; Lamers, A; Le Roux, Annick; Severe, Armelle; Boeuf, Gilles; Mayer Gostan, N.
Turbot juveniles were exposed to four ammonia concentrations [0.17 (L), 0.34 (M), 0.73 (MH) and 0.88 (H) mgl(-1) NH3-N] for different exposure durations (28 days minimum to 84 days). Their physiological status and growth performances were compared to a control group [0.004 (C) mgl(-1) NH3-N]. No growth was observed in the H group, and by day 57, mass increase in the MH group was only 15% of that in group C. During the first month growth in the L group was similar to that in control group while it was lower (33%) in the M group; afterwards the L and M groups had a similar growth (half that of controls). Accumulation of total ammonia nitrogen (TA-N) in plasma was dependent on ambient ammonia concentrations. Plasma urea levels in ammonia-exposed fish were...
Tipo: Text
Palavras-chave: Urea; Total ammonia nitrogen; Scophthalmus maximus; Ion regulation; Cortisol; Chronic toxicity.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/publication-618.pdf

DEDUCTION : A research project for shrimp farming sustainability in New-Caledonia
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Beliaeff, Benoit; Chim, Liet; Della Patrona, Luc; Goyard, Emmanuel; Herlin, Jose; Labreuche, Yannick; Walling, Emilie; Ansquer, Dominique; Brun, Pierre; Castex, Mathieu; Coatanea, Denis; Courties, Claude; De Lorgeril, Julien; Dufour, Robert; Frappier, Julie; Goarant, Cyrille; Huber, Matthias; Lemaire, Pierrette; Lemonnier, Hugues; Loubersac, Lionel; Le Roux, Frederique; Lucas, Ronan; Patrois, Jacques; Peignon, Jean-marie; Pham, Dominique; Ramage, Yannick; Soulard, Benoit; Vic, Marlene; Vourey, Elodie; Wabete, Nelly.
New Caledonian shrimp farming feasibility studies started in the mid-seventies. Today ca. 2000 tons of Litopenaeus stylirostris, introduced in 1978, are semi-intensively produced each year. Since fifteen years, production has been impacted by two seasonal vibriosis, the “Summer” syndrome caused by Vibrio nigripulchritudo in relation to pond bottom and water column quality, and the “Winter Syndrome” caused by Vibrio penaeicida in relation to drastic temperature drops . With the ambition of elucidating processes possibly leading to mortality outbreaks in ponds, Ifremer has been conducting a research program since 2003 under the DESANS project (2003-2006) and the present DEDUCTION project, equally funded by the South and North Provinces and by the Government...
Tipo: Text
Palavras-chave: Shrimp farming; Technical and scientific support; Vibriosis; Water quality; Pathology; Ecophysiology; Genetics; Zoosanitary monitoring and procedures; Multifactorial and multidisciplinary approach.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00143/25438/23591.pdf

Biocénoses des fonds durs du bathyal et de l’abyssal. Sous-région marine Golfe de Gascogne. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guillaumont, Brigitte; Van Den Beld, Inge; Davies, Jaime; Bayle, Christophe.
Tipo: Text
Palavras-chave: Golfe de Gascogne; Fonds durs; Biocénoses; Coraux; Etat écologique.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00329/44025/43597.pdf

The effects of ionizing radiation, high energy electron beams, an depuration on shell stock oyster shelflife and Vibrio vulnificus content
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dixon, D; Rodrick, G.
Total bacterial numbers were reduced three to four log cycles upon exposure of shell stock oysters to ionising radiation (60Co) at 1.0, 2.0 and 5.0 kiloGrays.Vibrio vulnificus was detected in the non-irradiated control shell stock oysters, however, it was not detected in any of the shell stock after 1.0, 2.0 and 5.0 kiloGrays of exposure. The shelflife of irradiated shell stock oysters and depurated oysters was also compared. Fifty percent of the irradiated oysters were dead within 12, 10 and 7 days at 1.0, 2.0 and 5.0 kiloGrays of exposure, respectively. In contrast, fifty percent of the depurated oysters were dead after 31 days. Cultures of virulent and avirulent Vibrio vulnificus in phosphate buffered saline were quite radiosensitive as no colony...
Tipo: Text
Palavras-chave: ASW; USA; Florida USA Coasts Vibrio vulnificus Crassostrea virginica Bivalvia Bacteria Marine molluscs Food technology Ionizing radiation Self purification Shellfish Oyster culture.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-1620.pdf

Is the Species Flock Concept Operational? The Antarctic Shelf Case
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lecointre, Guillaume; Ameziane, Nadia; Boisselier, Marie-catherine; Bonillo, Celine; Busson, Frederic; Causse, Romain; Chenuil, Anne; Couloux, Arnaud; Coutanceau, Jean-pierre; Cruaud, Corinne; D'Udekem D'Acoz, Cedric; De Ridder, Chantal; Denys, Gael; Dettai, Agnes; Duhamel, Guy; Eleaume, Marc; Feral, Jean-pierre; Gallut, Cyril; Havermans, Charlotte; Held, Christoph; Hemery, Lenaig; Lautredou, Anne-claire; Martin, Patrick; Ozouf-costaz, Catherine; Pierrat, Benjamin; Pruvost, Patrice; Puillandre, Nicolas; Samadi, Sarah; Saucede, Thomas; Schubart, Christoph; David, Bruno.
There has been a significant body of literature on species flock definition but not so much about practical means to appraise them. We here apply the five criteria of Eastman and McCune for detecting species flocks in four taxonomic components of the benthic fauna of the Antarctic shelf: teleost fishes, crinoids (feather stars), echinoids (sea urchins) and crustacean arthropods. Practical limitations led us to prioritize the three historical criteria (endemicity, monophyly, species richness) over the two ecological ones (ecological diversity and habitat dominance). We propose a new protocol which includes an iterative fine-tuning of the monophyly and endemicity criteria in order to discover unsuspected flocks. As a result nine "full" species flocks...
Tipo: Text
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00296/40754/39754.pdf

Département Loire-Atlantique. 2018. Activité des navires de pêche.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d’Informations Halieutiques » (SIH) de l’Ifremer, qui constitue le réseau d’observation des ressources halieutiques et des usages associés. Ce projet s’inscrit dans la mission de service d’intérêt public de l’Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l’analyse du secteur des pêches, le SIH a en charge l’élaboration d’indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche et du grand public.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00608/71990/70694.pdf

Baie du mont saint-Michel - Etude écologique d'avant projet du site marémoteur du golfe normano-breton - Etude bio sédimentaire du secteur oriental de la baie
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guillaumont, Brigitte; Hamon, Dominique; D'Ozouville, Laurent.
Un des aspects de l'étude écologique d'avant-projet du site marémoteur du golfe normano-breton confié par EDF au CNEXO a consisté à identifier les peuplements benthiques de la zone intertidale de la baie du Mont-St-Michel. L'idée directrice a été de définir les différentes composantes faunistiques de la baie en fonction~ notamment la nature du substrat et du niveau bathymétrique. L'analyse des données bibliographiques a fait rapidement apparaître le manque de données biologiques dans la partie orientale de la baie, aussi l'étude a-t-elle été centrée sur ce secteur.
Tipo: Text
Ano: 1984
URL: http://archimer.ifremer.fr/doc/00004/11522/8103.pdf

Transport maritime et ports. Sous-région marine Méditerranée occidentale. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cumunel, Catherine; Guingand, Aurélien.
Tipo: Text
Palavras-chave: Méditerranée; Transport maritime; Indicateurs; Ports; Réglementation; Interaction avec le milieu.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00331/44255/43824.pdf

A Limited Effect of Sub-Tropical Typhoons on Phytoplankton Dynamics
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chai, Fei; Wang, Yuntao; Xing, Xiaogang; Yan, Yunwei; Xue, Huijie; Wells, Mark; Boss, Emmanuel.
Typhoons are assumed to stimulate ocean primary production through the upward mixing of nutrients into the surface ocean, based largely on observations of increased surface chlorophyll concentrations following the passage of typhoons. This surface chlorophyll enhancement, seen on occasion by satellites, more often is undetected due to intense cloud coverage. Daily data from a BGC-Argo profiling float revealed the upper-ocean response to Typhoon Trami in the Northwest Pacific Ocean. Temperature and chlorophyll changed rapidly, with a significant drop in sea surface temperature and surge in surface chlorophyll associated with strong vertical mixing, which was only partially captured by satellite observations. However, no net increase in vertically integrated...
Tipo: Text
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00645/75667/76533.pdf

Influence du positionnement des filières ostréicoles et mytilicoles dans le Pertuis Breton : Résultats préliminaires
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Robert, Stephane; Fillon, Alain.
La mise en place d'une nouvelle zone de filière ostréicole fait actuellement l'objet d'une demande de la Section Régionale Ré Centre-Ouest. L'objectif du projet est de transférer une partie de l'ostréiculture d'estran sur filières, le tout à biomasse constante afin d'obtenir un gain de productivité. Deux sites ont été proposés. La proximité des zones d'élevage (mytilicole et ostréicole) en filières laisse supposer une compétition possible de l'exploitation des ressources alimentaires dans l'ensemble géographique du Pertuis Breton. Par conséquent, le choix du site d'élevage est particulièrement important et doit être sélectionné de façon à minimiser l'impact sur les cultures déjà existantes. Pour cela, l'influence du positionnement des filières a été étudié...
Tipo: Text
Palavras-chave: Filière ostréicole; Modélisation; Courantologie; Bathymétrie; Pertuis Breton; Pertuis Antioche.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00149/26026/24127.pdf

Diel changes in acoustic and catch estimates of krill biomass
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Simard, Yvan; Sourisseau, Marc.
Krill-biomass estimates can be compromised by diel variabilities in acoustic backscatter and the catch efficiencies of various nets. This paper describes an effort to quantify these variabilities at fine temporal and spatial scales during a three-day experiment at a fixed location, using high-resolution, stratified Bioness samples and echo-integration, and assuming a fixed distribution of krill orientations. Night-time catches in the krill scattering layer (SL) were 15 times the acoustic estimates. The situation was reversed during daytime, when the acoustic estimates in the SL were 5 times larger than the catches. This collectively resulted in a ±10-dB gradual diel cycle in the difference of vertically integrated biomass from both sampling methods. Use of...
Tipo: Text
Palavras-chave: Thysanoessa raschi; Target strength; Strobe light; St Lawrence Estuary; Meganyctiphanes norvegica; Krill; In situ orientation; Feeding; Diel vertical migration; Avoidance.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6591.pdf

Avis concernant le projet d'avenant au cahier des charges de la concession de l'outillage public du port de La Rochelle-Pallice à la Chambre de Commerce et d'Industrie de La Rochelle
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dardignac, Marie-jose.
Tipo: Text
Ano: 1979
URL: https://archimer.ifremer.fr/doc/00153/26402/24499.pdf

Long-term changes on estuarine ciliates linked with modifications on wind patterns and water turbidity
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: López-abbate, M. Celeste; Molinero, Juan-carlos; Perillo, Gerardo M.e.; Barría De Cao, M. Sonia; Pettigrosso, Rosa E.; Guinder, Valeria A.; Uibrig, Roman; Berasategui, Anabela A.; Vitale, Alejandro; Marcovecchio, Jorge E.; Hoffmeyer, Mónica S.
Planktonic ciliates constitute a fundamental component among microzooplankton and play a prominent role in carbon transport at the base of marine food webs. How these organisms respond to shifting environmental regimes is unclear and constitutes a current challenge under global ocean changes. Here we examine a multiannual field survey covering 25 years in the Bahía Blanca Estuary (Argentina), a shallow, flood-plain system dominated by wind and tidal energy. We found that the estuary experienced marked changes in wind dominant regimes and an increase in water turbidity driven from the joint effect of persistent long-fetch winds and the indirect effect of the Southern Annular Mode. Along with these changes, we found that zooplankton components, i.e. ciliates...
Tipo: Text
Palavras-chave: Tintinnids; Oligotrichs; Acartia tonsa; Wind; Turbidity; Estuaries.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00471/58252/60760.pdf

A decision-making framework to reduce the risk of collisions between ships and whales
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sèbe, Maxime; Kontovas, Christos, A.; Pendleton, Linwood.
Ship strikes are one of the main human-induced threats to whale survival. A variety of measures have been used or proposed to reduce collisions and subsequent mortality of whales. These include operational measures, such as mandatory speed reduction, or technical ones, such as detection tools. There is, however, a lack of a systematic approach to assessing the various measures that can mitigate the risk of ship collisions with whales. In this paper, a holistic approach is proposed to evaluate mitigation measures based on a risk assessment framework that has been adopted by the International Maritime Organization (IMO), namely the Formal Safety Assessment (FSA). Formal Safety Assessment (FSA) is “a rational and systematic process for assessing the risk...
Tipo: Text
Palavras-chave: Whale; Collision; Ship strikes; Risk assessment; Cost-effectiveness.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00588/69982/67892.pdf

Capéchade. Provence-Alpes-Côte d'Azur. 2017. Observation des Marées au débarquement - OBSDEB
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public. Ces indicateurs intègrent...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00597/70866/69099.pdf

Optimization of Air Backwash Frequency during the Ultrafiltration of Seawater
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cordier, C; Eljaddi, Tarik; Ibouroihim, Nadjim; Stavrakakis, Christophe; Sauvade, Patrick; Coelho, Franz; Moulin, Philippe.
The main objective of this paper is to study the effect of new air backwash on dead-end ultrafiltration of seawater with a pilot at semi-industrial scale (20 m3/day). To control membrane fouling, two different backwashes were used to clean the membrane: classical backwash (CB) and new air backwash (AB) that consists of injecting air into the membrane module before a classical backwash. To evaluate the efficiency of AB and CB, a resistance in series model was used to calculate each resistance: membrane (Rm), reversible (Rrev) and irreversible (Rirr). The variation of the seawater quality was considered by integrating the turbidity variation versus time. The results indicate clearly that AB was more performant than CB and frequency of AB/CB cycles was...
Tipo: Text
Palavras-chave: Ultrafiltration; Seawater treatment; Air backwash; Fouling control.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00625/73682/73146.pdf

Integrated ecological-economic fisheries models-Evaluation, review and challenges for implementation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Nielsen, J. Rasmus; Thunberg, Eric; Holland, Daniel S.; Schmidt, Jorn O.; Fulton, Elizabeth A.; Bastardie, Francois; Punt, Andre E.; Allen, Icarus; Bartelings, Heleen; Bertignac, Michel; Bethke, Eckhard; Bossier, Sieme; Buckworth, Rik; Carpenter, Griffin; Christensen, Asbjorn; Christensen, Villy; Da-rocha, Jose M.; Deng, Roy; Dichmont, Catherine; Doering, Ralf; Esteban, Aniol; Fernandes, Jose A.; Frost, Hans; Garcia, Dorleta; Gasche, Loic; Gascuel, Didier; Gourguet, Sophie; Groeneveld, Rolf A.; Guillen, Jordi; Guyader, Olivier; Hamon, Katell; Hoff, Ayoe; Horbowy, Jan; Hutton, Trevor; Lehuta, Sigrid; Little, L. Richard; Lleonart, Jordi; Macher, Claire; Mackinson, Steven; Mahevas, Stephanie; Marchal, Paul; Mato-amboage, Rosa; Mapstone, Bruce; Maynou, Francesc; Merzereaud, Mathieu; Palacz, Artur; Pascoe, Sean; Paulrud, Anton; Plaganyi, Eva; Prellezo, Raul; Van Putten, Elizabeth I.; Quaas, Martin; Ravn-jonsen, Lars; Sanchez, Sonia; Simons, Sarah; Thebaud, Olivier; Tomczak, Maciej T.; Ulrich, Clara; Van Dijk, Diana; Vermard, Youen; Voss, Rudi; Waldo, Staffan.
Marine ecosystems evolve under many interconnected and area-specific pressures. To fulfil society's intensifying and diversifying needs while ensuring ecologically sustainable development, more effective marine spatial planning and broader-scope management of marine resources is necessary. Integrated ecological–economic fisheries models (IEEFMs) of marine systems are needed to evaluate impacts and sustainability of potential management actions and understand, and anticipate ecological, economic and social dynamics at a range of scales from local to national and regional. To make these models most effective, it is important to determine how model characteristics and methods of communicating results influence the model implementation, the nature of the...
Tipo: Text
Palavras-chave: Bio-economic models; Comparative model evaluation; Fisheries management advice; Integrated ecological-economic fisheries models; Marine spatial planning and cross-sector management; Performance criteria and scales and risks; Use and acceptance and implementation and communication and flexibility and complexity.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00391/50269/50898.pdf

EXtreme ecosystem studies in the deep OCEan: Technological Developments. EXOCET/D
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sarradin, Pierre-marie; Sarrazin, Jozee; Cadiou, Jean-francois; Olu, Karine; Desbruyeres, Damien; Rigaud, Vincent; Drogou, Jean-francois; Lecornu, Fabrice; Rolin, Jean-francois; Vuillemin, Renaud; Cambon-bonavita, Marie-anne; Sauter, E; Von Juterzenka, K; Boetius, A; Santos, Rs; Colaco, Ana; Pascoal, A; Oliveira, Paulo; Shillito, Bruce; Zal, F; Schultz, A; Taylor, P; Lane, D; Loke, Rob; Du Buf, H; Waldmann, C; Cormack, A; Sanfilippo, L; Masson, M.
The general objective of EXOCET/D is to develop, implement and test specific instruments aimed at exploring, describing, quantifying and monitoring biodiversity in deep-sea fragmented habitats as well as at identifying links between community structure and environmental dynamics. Onboard experimental devices will complement the approach, enabling experiments on species physiology. The EXOCET/D working fields include: video and acoustic imagery, in situ analysis of physico-chemical factors, quantitative sampling of macroand micro-organisms, in vivo experiments, integration of multidisciplinary data, implementation on European deep-submersibles and a final phase of technical and scientific validation
Tipo: Text
Palavras-chave: Deep sea; Ecosystem; Imagery; In situ analysis; Faunal sampling; Submersibles; Observatory.
Ano: 2004
URL: https://archimer.ifremer.fr/doc/2007/publication-3600.pdf

Estimation d'un stock naturel de coquille Saint Jacques par une méthode combinant les dragages et la plongée. Traitement des résultats par une méthode géostatistique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Buestel, Dominique; Dao, Jean-claude; Gohin, Francis.
The efficiency of the fishing drags in the Saint Brieuc Bay, Brittany, has been determined through the analysis of the tracks left on the seabed. The results, which focus mostly on the age class n°2 (2.5 years), show that the efficiency and the damages caused by the drags vary heavily according to the nature of the seabed. For soft bottoms, the average efficiency is 67 % and the global damage is 2 %. Concerning hard bottoms, the values are respectively 30 % and 17 %. These efficiency results combined with those of a dragging expedition in a set sector of the Saint-Brieuc Bay enable a direct assessment of the abundance. A result treatment method deriving from the geostatistical theory is used: it takes into account the spatial structure of the king scallop...
Tipo: Text
Palavras-chave: Coquille Saint Jacques; Plongée; Dragage; Pecten maximus L.; Estimation stocks.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-6536.pdf

Accumulation du cadmium par Mytilus edulis en présence de bactéries marines sensibles ou résistantes à ce metal
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Flatau, Gilles N.; Gauthier, Michel J.
The cadmium accumulation by the soft parts of the mussels increased in the presence of the sensitive strain, and was lower in the presence of the resistant strain, when only ionic metal was given to the mussels. The metal brought by previously contamined and killed bacteria was more accumulated by the different organs than when it was provided in the ionic form, and was more accumulated by viscera and gills when it was bound to the resistant bacteria.
Tipo: Text
Palavras-chave: Cadmium; Accumulation; Moule; Bactéries marines; Résistance.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/00306/41754/40965.pdf

Accuracy Assessment of Coastal Topography derived from UAV Images
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Long, N.; Millescamps, B.; Pouget, F.; Dumon, A.; Lachaussee, N.; Bertin, X.
To monitor coastal environments, Unmanned Aerial Vehicle (UAV) is a low-cost and easy to use solution to enable data acquisition with high temporal frequency and spatial resolution. Compared to Light Detection And Ranging (LiDAR) or Terrestrial Laser Scanning (TLS), this solution produces Digital Surface Model (DSM) with a similar accuracy. To evaluate the DSM accuracy on a coastal environment, a campaign was carried out with a flying wing (eBee) combined with a digital camera. Using the Photoscan software and the photogrammetry process (Structure From Motion algorithm), a DSM and an orthomosaic were produced. Compared to GNSS surveys, the DSM accuracy is estimated. Two parameters are tested: the influence of the methodology (number and distribution of...
Tipo: Text
Palavras-chave: Digital Surface Model; Coastal monitoring; UAV photogrammetry; Accuracy.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00668/78011/80248.pdf

Constraints on Earth System Functioning at the Paleocene‐Eocene Thermal Maximum From the Marine Silicon Cycle
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fontorbe, Guillaume; Frings, Patrick J.; De La Rocha, Christina L.; Hendry, Katharine R.; Conley, Daniel J.
The Paleocene‐Eocene Thermal Maximum (PETM, ca. 56 Ma) is marked by a negative carbon isotope excursion (CIE) and increased global temperatures. The CIE is thought to result from the release of 13C‐depleted carbon, although the source(s) of carbon and triggers for its release, its rate of release, and the mechanisms by which the Earth system recovered are all debated. Many of the proposed mechanisms for the onset and recovery phases of the PETM make testable predictions about the marine silica cycle, making silicon isotope records a promising tool to address open questions about the PETM. We analyzed silicon isotope ratios (δ30Si) in radiolarian tests and sponge spicules from the Western North Atlantic (ODP Site 1051) across the PETM. Radiolarian δ30Si...
Tipo: Text
Palavras-chave: Paleocene‐Eocene Thermal Maximum; Silicon biogeochemical cycle; Silicon isotopes; Weathering.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00627/73939/73287.pdf

MoMAR’08 – Leg 1 (Lucky Strike). Cruise Report. 9-24 Aug 2008.N/O Atalante – Victor 6000
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Escartin, Javier.
The MOMAR08-Leg 1 cruise combined three different scientific programs within the MoMAR project : - RECO (PI : P. M. Sarradin) : Ecology and environment - Graviluck (V. Ballu) : Seafloor geodesy - Bathyluck (J. Escartin) : Temperature and seismic monitoring The studies are concentrated on the Lucky Strike volcano on the Mid-Atlantic Ridge at 37°N. The volcano hosts a large hydrothermal site and overlies one of the only magma chambers that has been imaged on a slow-spreading oceanic ridge. The hydrothermal site has been the site of continuous biological and geochemical experiments for more than a decade, and will be the site for a future seafloor observatory to be initiated with the MOMARSAT program (pre-programmed for 2010). The main goal of the cruise was...
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00360/47148/47101.pdf

Utilisation de Posidonia oceanica (L.) Delile comme bio-indicateur de la contamination métallique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lafabrie, Céline.
The coastal zone of the continental shelf contains a high ecological richness. However, this zone is very fragile towards xenobiotics ; the pollution of this environment can be damaging to the structure of the biocenoses and to the productivity of the ecosystems. Metals, contrarily to numerous contaminants, are normal constituents of the environment at a trace level, but are all toxic above a certain threshold. At the end of the 1970s, several researchers proposed the use of organisms to evaluate the quality of the marine environment ; it is in this context that the bio-indicator concept arises. The seagrass Posidonia oceanica (L.) Delile, endemic of the Mediterranean Sea, has been the subject of several works proposing to use this species to determine the...
Tipo: Text
Palavras-chave: Mediterranean Sea; Human impacts; Metal contamination; Trace metals; Bio indicator; Posidonia oceanica; Méditerranée; Impacts anthropiques; Contamination métallique; Métaux traces; Bio indicateur; Posidonia oceanica.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/these-3082.pdf

Simulating the effect of regulatory systems in a fishery - An application to the French driftnet albacore fleet
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guyader, Olivier.
With a thin economic component, most bio-economic models of fisheries fail to assess the effects of the regulation systems on firms. In order to analyse the short term consequences of different management schemes, a simulation model is applied to the French driftnet albacore fleet: licence allocation with driftnet regulation, individual quotas, and individual transferable quotas without any input control. Vessel technology is estimated by using the data collected, and groups of vessels are distinguished according to criteria of performance. We present the adjustment within firms and between groups under different scenarios (limited entry with and without driftnet regulation, individual quotas and individual transferable quotas allocation), and we compare...
Tipo: Text
Palavras-chave: Albacore tuna; Dolphin; Driftnet; Fisheries; ITQ; Licence; Quasi-rent; Quota price; Quotas; Regulation; Simulation.
Ano: 2002
URL: https://archimer.ifremer.fr/doc/00244/35523/34036.pdf

Variabilité de la salinité de surface d'après un modèle global de couche mélangée océanique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Michel, Sylvain.
Sea surface salinity (SSS) influences numerous oceanic phenomena, for instance surface water ventilation, deep water formation and thermohaline circulation. SSS also controls some ocean-atmosphere coupled processes, such as the intensity of freshwater flux and the penetration of heat flux and turbulence. Salinity is more difficult to measure than temperature from in situ surveys, which results in 20 times less data being currently available. Moreover, sea surface temperature (SST) is routinely estimated from satellites, which is not possible yet for SSS. Two space missions will fill this gap soon: SMOS from the European Space Agency and Aquarius/SAC-D from NASA and CONAE.  To contribute to the SMOS project, we propose a method for estimating SSS from...
Tipo: Text
Palavras-chave: SMOS; SSS; SST; MLD; Heat balance; Vertical entrainment; Geostrophic current; Air sea fluxes; Satellite observations; Mixed layer; Salinity; SMOS; SSS; SST; MLD; Bilan de chaleur; Entraînement vertical; Courants géostrophiques; Flux air mer; Observations satellitaires; Couche mélangée; Salinité.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/these-2302.pdf

Purification and partial identification of novel antimicrobial protein from marine bacterium Pseudoalteromonas species strain x 4 53
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Longeon, Arlette; Peduzzi, Jean; Barthelemy, Michel; Corre, Sophie; Nicolas, Jean-louis; Guyot, Museum National D'Histoire Naturelle.
A marine bacterium, X 153, was isolated from a pebble collected at St. Anne du Portzic (France). By 16S ribosomal DNA gene sequence analysis, X153 strain was identified as a Pseudoalteromonas sp. close to P. piscicida. The crude culture of X153 was highly active against human pathogenic strains involved in dermatologic diseases, and marine bacteria including various ichthyopathogenic Vibrio strains. The active substance occurred both in bacterial cells and in culture supernatant. An antimicrobial protein was purified to homogeneity by a 4-step procedure using size-exclusion and ion-exchange chromatography. The highly purified P-153 protein is anionic, and sodium dodecylsulfate polyacrylamide gel electrophoresis gives all apparent molecular mass of 87 kDa....
Tipo: Text
Palavras-chave: Probiotic bacteria; Pseudoalteromonas; Antimicrobial protein.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-426.pdf

The distribution of particulate mo in the atlantic aerosol
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chester, R; Sharples, Ej; Murphy, Kjt.
Tipo: Text
Ano: 1984
URL: http://archimer.ifremer.fr/doc/00113/22442/20129.pdf

Report of the Working Group on Integrating Surveys for the Ecosystem Approach (WGISUR), 21-23 January 2014, Nantes, France
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ICES.
Tipo: Text
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00587/69880/67786.pdf

Bringing ‘Deep Knowledge’ of Fisheries into Marine Spatial Planning
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Said, Alicia; Trouillet, Brice.
In marine spatial planning (MSP), the production of knowledge about marine-based activities is fundamental because it informs the process through which policies delineating the use of space are created and maintained. This paper revises our view of knowledge—developed during the mapping and planning processes—as the undisputed factual basis on which policy is developed. Rather, it argues that the construction, management, validation, and marginalisation of different types of knowledge stemming from different stakeholders or disciplinary approaches is at the heart of policy and planning processes. Using the case of fisheries-generated knowledge in the implementation of MSP, we contend that the fisheries data informing the MSP process are still very much...
Tipo: Text
Palavras-chave: Knowledge; Power; Co-production; Spatial planning; Fisheries; Data model; Technical considerations; Political scrutiny.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00652/76386/77397.pdf

Résumé graphique des diagnostics et avis émis par le CIEM en 2017
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Biseau, Alain.
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00426/53756/54648.pdf

First results from a pilot survey of recreational fishing in France
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Herfaut, Johanna; Levrel, Harold; Thebaud, Olivier; Tranger, Hervé; Berthou, Patrick; Dintheer, Christian; Guyader, Olivier; Morizur, Yvon.
Between 2006 and 2008, Ifremer, in collaboration with the polling institute BVA, implemented a pilot survey of french recreational fisheries. The aim of the survey was to assess the overall population involved in this activity, taking into account the diversity of recreational fishing practices, from fish and shellfish gathering on the seashore to angling and spearfishing. The study was designed to provide first estimates of fishing effort, catches and landings, and economic impacts of recreational fishing. The protocol implemented was two-step. First, a telephone survey of french households, based on a sampling frame of the entire french population of people aged 15+, was carried out to assess the population of fishers and give a first general view of the...
Tipo: Text
Palavras-chave: Recreational fishing; Survey methodology; Catch and effort assessment; Economic impact.
Ano: 2008
URL: https://archimer.ifremer.fr/doc/00502/61368/64984.pdf

Elements sur les interventions financieres de l'etat dans le secteur des peches artisanales
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Catanzano, Joseph.
The State's main lines of action in the maritime fishing sector are not at all specific. They aim to define, among others, the regulation of relations among the different actors within the sector as well as the technical and administrative methods of management (Wehrin H, 1987). In terms of halieutic resources, the European Community has partially taken the place of state power to set, in particular, rules of management and exploitation of the stocks. The TAC and quotas, keys of resource distribution, and the market policy set up through producer organisations, are indications of this substitution in progress. The recent request coming from the European Community for reducing the fishing effort is witness as well of this transfer in progress (decision of...
Tipo: Text
Palavras-chave: SEM.
Ano: 1988
URL: http://archimer.ifremer.fr/doc/1988/rapport-2431.pdf

Paralytic phycotoxin uptake by scallops (Pecten maximus)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lassus, Patrick; Bardouil, Michele; Ledoux, Martial; Murail, Ingrid; Bohec, Madeleine; Truquet, Philippe; Frémy, Jean-marc; Rohmer, Véronique.
It is difficult to apply sanitary standards for mollusc contamination by paralytic shellfish poisoning to animals not consumed whole. This problem is illustrated by the 1990 embargo on a Japanese shipment of frozen scallop muscle and gonad: the sanitary threshold applied to digestive gland (in Japan) does not guarantee that muscle and especially gonad are toxin-free. Accordingly, we performed experimental contaminations of scallops (Pecten maximus) from Port-en-Bessin (Normandy, France) using a toxic Japanese strain of Alexandrium tamarense. During the contamination/decontamination experiment on different tissues (digestive gland, muscle, gonad), extracts were obtained using cold acetic acid 0.1 N to maintain the perfect integrity of the toxin profile....
Tipo: Text
Palavras-chave: Alexandrium tamarense; Phycotoxines; Bioaccumulation; Profils toxiniques; Pecten maximus; Patinopecten yessoensis; Alexandrium tamarense; Phycotoxins; Bioaccumulation; Toxin profiles; Patinopecten yessoensis; Pecten maximus.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00189/30075/28563.pdf

Consistency of the current global ocean observing systems from an Argo perspective
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Von Schuckmann, Karina; Sallee, Jean-baptiste; Chambers, D.; Le Traon, Pierre-yves; Cabanes, Cecile; Gaillard, Fabienne; Speich, Sabrina; Hamon, Mathieu.
Variations in the world's ocean heat storage and its associated volume changes are a key factor to gauge global warming and to assess the earth's energy and sea level budget. Estimating global ocean heat content (GOHC) and global steric sea level (GSSL) with temperature/salinity data from the Argo network reveals a positive change of 0.5 +/- 0.1 W m(-2) (applied to the surface area of the ocean) and 0.5 +/- 0.1 mm year(-1) during the years 2005 to 2012, averaged between 60 degrees S and 60 degrees N and the 10-1500m depth layer. In this study, we present an intercomparison of three global ocean observing systems: the Argo network, satellite gravimetry from GRACE and satellite altimetry. Their consistency is investigated from an Argo perspective at global...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00202/31365/29753.pdf

Département Charente-Maritime. 2018. Activité des navires de pêche.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d’Informations Halieutiques » (SIH) de l’Ifremer, qui constitue le réseau d’observation des ressources halieutiques et des usages associés. Ce projet s’inscrit dans la mission de service d’intérêt public de l’Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l’analyse du secteur des pêches, le SIH a en charge l’élaboration d’indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche et du grand public.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00608/71985/70689.pdf

Fault reactivation and selective abandonment in the oceanic lithosphere
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Delescluse, M.; Montesi, L. G. J.; Chamotrooke, Nicolas.
Normal and transform faults originally formed at a spreading-centre can be reactivated in diffuse plate boundary zones and in areas of lithospheric flexure such as at peripheral bulges to subduction zones. Using new seismic reflection profiles and modeling, we investigate how the original oceanic fabric is reactivated in the simple case of fault perpendicular compression. In the Central Indian Basin, well-oriented normal paleofaults were reactivated with reverse motion at the very onset of deformation (9 Ma) but only a small subset remained active past similar to 7 Ma, suggesting that most of the densely spaced small-offset faults were abandoned while deformation localized onto fewer faults with larger spacing. We find a similar evolution using a 2D finite...
Tipo: Text
Ano: 2008
URL: https://archimer.ifremer.fr/doc/00237/34804/33329.pdf

Hydrography above the mid-atlantic ridge (33-degrees-40-degrees-n) and within the lucky-strike segment
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Wilson, Cara; Speer, Kevin; Charlou, Jean-luc; Bougault, Henri; Klinkhammer, Gary.
As part of the French-American Ridge Atlantic program the French-American Zero-Angle Photon Spectrometer and Rocks (FAZAR) cruise conducted water column studies between 33 and 40 degrees N along the Mid-Atlantic Ridge (MAR)) to detect hydrothermal activity and map its influence, This paper describes the large-scale hydrography within the axial valley, with particular emphasis on the hydrothermally active Lucky Strike segment (37 degrees 17'N). The FAZAR study area is affected be the presence of the Azores Current and Mediterranean Water (MW). Although the MW core has been mapped as far north as 50 degrees N off the ridge; the northern boundary Of the MW within the MAR in the FAZAR study area exists as a strong front south of the Azores platform. This front...
Tipo: Text
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00069/18038/15586.pdf

The Catch-Survey Analysis (CSA) method of fish stock assessment: an evaluation using simulated data
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mesnil, Benoit.
The Catch-Survey Analysis (CSA) method of assessment aims at estimating stock abundance from relative indices by filtering measurement error in the latter through a simple two-stage population dynamics model. The method is not widely used and the associated literature is still limited. The objective of this work is to improve current understanding of the properties of the method, using data generated from a known fully age-structured population. A sensitivity analysis confirms that CSA is capable of providing reliable information about general stock trends. However, absolute estimates are sensitive to the parameter relating survey catchabilities of the two stages, which needs to be estimated externally with methods that warrant further validation. Biased...
Tipo: Text
Palavras-chave: Data limited environments; Collie Sissenwine model; Catch Survey Analysis; Stock assessment.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/publication-439.pdf

The Spatiotemporal Dynamics of the Sources and Sinks of CO2 in the Global Coastal Ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Roobaert, Alizee; Laruelle, Goulven G.; Landschuetzer, Peter; Gruber, Nicolas; Chou, Lei; Regnier, Pierre.
In contrast to the open ocean, the sources and sinks for atmospheric carbon dioxide (CO2) in the coastal seas are poorly constrained and understood. Here we address this knowledge gap by analyzing the spatial and temporal variability of the coastal air-sea flux of CO2 (FCO2) using a recent high-resolution (0.25 degrees) monthly climatology for coastal sea surface partial pressure in CO2 (pCO(2)). Coastal regions are characterized by CO2 sinks at temperate and high latitudes and by CO2 sources at low latitude and in the tropics, with annual mean CO2 flux densities comparable in magnitude and pattern to those of the adjacent open ocean with the exception of river-dominated systems. The seasonal variations in FCO2 are large, often exceeding 2 mol C m(-2)...
Tipo: Text
Palavras-chave: Coastal seas; Air-sea CO2 exchange; Seasonality; Ocean carbon cycle; Continental shelves.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00676/78795/81027.pdf

When everything is not everywhere but species evolve: an alternative method to model adaptive properties of marine ecosystems
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sauterey, Boris; Ward, Ben A.; Follows, Michael J.; Bowler, Chris; Claessen, David.
The functional and taxonomic biogeography of marine microbial systems reflects the current state of an evolving system. Current models of marine microbial systems and biogeochemical cycles do not reflect this fundamental organizing principle. Here, we investigate the evolutionary adaptive potential of marine microbial systems under environmental change and introduce explicit Darwinian adaptation into an ocean modelling framework, simulating evolving phytoplankton communities in space and time. To this end, we adopt tools from adaptive dynamics theory, evaluating the fitness of invading mutants over annual timescales, replacing the resident if a fitter mutant arises. Using the evolutionary framework, we examine how community assembly, specifically the...
Tipo: Text
Palavras-chave: Phytoplankton; Competition; Trait-based adaptive strategies; Adaptive dynamics; Eco-evolutionary dynamics; Trade-off; Community; Global circulation model.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00617/72883/71917.pdf

La télédétection des radiations infra-rouges appliquée à l’étude hydrologique et hydrodynamique de l’étang de Leucate (Roussillon).
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Loubersac, Lionel.
This work, realized in the laboratories of the Geologic and Hydrological Studies and Researches Center of the Faculty of Science of Montpellier benefited from the financial support of the CNEXO (training grant) and took place during a part of the third year of Engineering school (ENGEES of Strasbourg). The realized work exploited four thermal airborne exploratory missions to establish the criteria of quality and hydrodynamics of waters of the Leucate lagoon by thermal infrared scanning radiometry. The first part of this work handles climatological, geographical, morphological, hydrological, hydro dynamical and geological known parameters. The second part consists of the descriptive analysis by photo-interpretation of the obtained thermal imaging. Finally...
Tipo: Text
Ano: 1974
URL: http://archimer.ifremer.fr/doc/00189/30034/28520.pdf

Efficacité d'un outil de politique structurelle dans le secteur des pêches : le plan Mellick
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Durand, Jean-louis; Gueguen, Jacques; Catanzano, Joseph.
In order to comply with the requirements of the second Multiannual Guidance Plan concerning the fishing fleets in the EEC Member Countries, the French Secretary of State for the sea has implemented a decommissionning scheme in March 1991. To facilitate the withdrawal of an overall engine power representing 100000 kW, subsidies have been attributed to owners scaping their boat of selling it outside the EEC or for a purpose other than fishing. In parallel social measures were set to help the resignation or the retirement of skippers. In March 1992 applications concerning 975 vessels representing about 84 300 kW had been presented. Brittany accounts for 48.5 % of the boats and 43 % of the withdrawn power whereas the mediterranean ports represent only 9 % of...
Tipo: Text
Palavras-chave: SEM.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/rapport-4172.pdf

Contribution à l'étude du couplage entre diffusion d'eau et contrainte mécaniques dans les matériaux marins hautes performances
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Humeau, Corentin.
The aim of the study was to understand the impact of coupling on water diffusion and mechanical stress on marine installations. Moreover, we identified the key phenomena involved during this type of exposure. When we look to these type of applications we can distinguish two type of materials used: one for the structure and another for mooring facilities. The best performing structural materials appear to be composites, while the most effective mooring devices are made with synthetic ropes. Therefore, we decided to investigate both materials with the same method: first the properties uncoupled, second, as semi-coupled behaviours and finally as one coupled phenomenon. The present work highlights the divergences between uncoupled, semi-coupled and coupled...
Tipo: Text
Palavras-chave: Couplage; Diffusion d’eau; Contrainte mécanique; Vieillissement; Polymères; Cordages synthétiques; Composites; Coupling; Water diffusion; Mechanical stress; Ageing; Polymers; Synthetic ropes; Composites.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00499/61023/64424.pdf

Past and present platinum contamination of a major European fluvial-estuarine system: Insights from river sediments and estuarine oysters
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Abdou, M.; Schaefer, J.; Cobelo-garcia, A.; Neira, P.; Petit, J. C. J.; Auger, Dominique; Chiffoleau, Jean-francois; Blanc, Gerard.
Platinum Group Metals (PGM) are modern, technologically relevant elements for which (i) the anthropogenic cycle has outcompeted the natural cycles and (ii) environmental behavior, fate and impact are still widely unknown. Stripping voltammetry was used for accurate determinations of platinum (Pt) in historical records of river sediments and estuarine oysters from the Gironde fluvial-estuarine continuum (SW France) comprising the Lot River. Sediment cores from the Lot River, dated from 1952 to 2001, showed past Pt contamination due to former industrial (smelter) activities in the Lot River watershed. These samples revealed the phasing-out of a historical Pt contamination with Pt/Th (Thorium) values of 11 × 10− 5 ± 0.79 × 10− 5 for the deepest part of the...
Tipo: Text
Palavras-chave: Platinum; Sediments; Wild oysters; Bioaccumulation.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00311/42177/41478.pdf

Evaluation de la qualité des zones de production conchylicoles. Région Corse. Edition 2018
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Orsoni, Valerie.
Après un rappel des objectifs, du fonctionnement et de la méthode d’interprétation des résultats du réseau de contrôle microbiologique REMI et du réseau de surveillance chimique ROCCH, ce rapport inclut un bilan national et décrit le programme annuel de la Région Corse. Il présente l’ensemble des résultats obtenus entre 2014 et 2017, en particulier l’estimation de la qualité microbiologique et chimique des zones de production de coquillages classées : les étangs de la plaine orientale de la Corse.
Tipo: Text
Palavras-chave: REMI; E. coli; Contamination bactériologique des coquillages; ROCCH; Contaminants chimiques; Milieu marin; Classement sanitaire des zones de production; Région Corse.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00441/55305/56820.pdf

Herbivorous fishes and the potential of Caribbean marine reserves to preserve coral reef ecosystems
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kopp, Dorothee; Bouchon-navaro, Yolande; Louis, Max; Mouillot, David; Bouchon, Claude.
1. The development of macroalgae to the detriment of corals is now one of the major threats to coral reefs. Herbivorous fishes are partly responsible for algal regulation on coral reefs and their overexploitation favours the shift from scleractinian coral-dominated systems towards macroalgae-dominated systems. 2. Marine protected areas (MPAs) that have been established worldwide may benefit coral reefs through the maintenance of high densities of herbivorous fishes which regulate algal growth. 3. The paper assesses whether small MPAs in the Caribbean are able to enhance herbivorous fish stock and by controlling macroalgae help to maintain reef ecosystems. A visual census using band-transects was undertaken around Guadeloupe island where marine reserves...
Tipo: Text
Palavras-chave: Marine protected areas; Canonical analysis of principal coordinates; Sex change; Coral reefs; Phase shifts; Caribbean.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00011/12214/9551.pdf

Situation de la pêche à La Réunion en 2018
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Le présent document est une restitution globale des données disponibles au sein du SIH sur les navires de pêche français, et en particulier : • le fichier « Flotte de Pêche Communautaire » (FPC), qui référence l'ensemble des navires de pêche professionnelle de la flotte française et leurs caractéristiques techniques (source : DPMA) • les données du flux déclaratif, c'est-à-dire les déclarations de captures et d'effort de pêche des pêcheurs professionnels, issues des journaux de bord pour les navires de 10 mètres et plus et des fiches de pêche pour les navires de moins de 10 mètres (source : DPMA) • les données de ventes (essentiellement des ventes en criée) des navires de pêche professionnelle (source : DPMA) • les données d'enquêtes « Activité » réalisées...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00582/69456/67311.pdf

Le déterminisme sexuel de l'huître crassostrea gigas : du phénotype aux facteurs moléculaires sous-jacents
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Broquard, Coralie.
Knowledge about the mode of reproduction and the sex determination of the cupped oyster Crassostrea gigas remains limited. As a sequential hermaphroditic species, sex determination takes place several times during its lifetime. As part of this thesis, the sexual phenotypes of the first 6 years of life of oysters were identified in two cohorts. Thus, the sex ratio was biased towards females from the first sexual maturity, as well as for all subsequent years. After six years of sexing, 42%, 32%, 19%, 5%, 1% and 0.1% of oysters showed 0, 1, 2, 2, 3, 4 and 5 sex changes. The frequency of sex changes also decreased with age (34% between years 1-2 to 9% between years 5-6). This thesis work has also sought to determine the influence of sex and sex change on the...
Tipo: Text
Palavras-chave: Déterminisme sexuel; Facteurs moléculaires; Sex determination; Hermaphroditism; Growth; Molecular factors; C. gigas.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00692/80422/83558.pdf

New insights into the origin and distribution of the DUPAL isotope anomaly in the Indian Ocean mantle from MORB of the Southwest Indian Ridge
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Meyzen, Cm; Ludden, Jn; Humler, E; Luais, B; Toplis, Mj; Mevel, C; Storey, M.
We report new Sr, Nd, and Pb isotope data for Mid-Ocean Ridge Basalts (MORB) dredged between 35 and 69 degrees E along a similar to 4100 km section of the Southwest Indian Ridge (SWIR), which is one of the slowest spreading ridges of the global mid-ocean ridge system ( full rate of 16 mm yr(-1)). The SWIR appears isotopically more heterogeneous than other mid-ocean ridges over similar length scales and comparable sampling density. Isotopic variations are generally independent of ridge segmentation, and the degree of heterogeneity decreases from west to east. This decrease in heterogeneity correlates with the observed increase in axial depth and decrease in crustal thickness, commonly attributed to decreasing mantle potential temperature. Data for the...
Tipo: Text
Palavras-chave: Southwest Indian Ridge; MORB; Isotopes; Indian Ocean; Lower crust; Mantle.
Ano: 2005
URL: https://archimer.ifremer.fr/doc/00232/34286/32655.pdf

Sources de variation de la forme des otolithes: Implications pour la discrimination des stocks de poissons
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mahe, Kelig.
The assessment and management of fish populations is based on the use of management units called fish stocks. The shape of otoliths, calcified structures of the fish's inner ear, can be used to discriminate these stocks. First, this thesis focuses on the study of the spatio-temporal variability of the otolith’s shape for three fish species with different ecological characteristics (size, swimming speed, behaviour in the water column, etc.) and biogeographical environments. The results showed that there is a decreasing structural gradient across stock sizes from large pelagic species to more localised demersal species. This is linked to the fact that some demersal species such as the bogue (Boops boops) are constrained by the presence of geographical...
Tipo: Text
Palavras-chave: Otolithe; Forme; Stock halieutique; Descripteurs de Fourier; Température; Acides gras; Asymétrie directionnelle; Degrés-jours de croissance; Otolith; Shape; Fish stock; Fourier descriptors; Temperature; Fatty acids; Directional asymmetry; Growing degree days.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00598/70972/69201.pdf

Résultats de la Surveillance de la Qualité du Milieu Marin Littoral. Départements : Haute Corse et Corse du Sud. Edition 2000
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: IFREMER, laboratoire côtier de Corse.
Dans le cadre du Système national d'Information sur l'Eau, mis en place par le Ministère de l'Ecologie et du Développement Durable, l’Institut national de recherche marine (Ifremer) opère de façon coordonnée à l'échelle du littoral français trois programmes nationaux de surveillance : le réseau de contrôle microbiologique (REMI), le réseau de surveillance du phytoplancton et des phycotoxines (REPHY), le Réseau d'Observation de la Contamination Chimique (RNO). Le suivi des phycotoxines dans les coquillages réalisé par le REPHY est sous maîtrise d'ouvrage du Ministère de l'Agriculture et de la Pêche. Sous l’impulsion de la Directive européenne Cadre sur l'Eau (DCE), le réseau de surveillance benthique (REBENT) est en voie d’extension nationale.
Tipo: Text
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00318/42947/42455.pdf

Improved description of the ocean mesoscale variability by combining four satellite altimeters - art. no. L02611
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pascual, Ananda; Faugere, Yannice; Larnicol, Gilles; Le Traon, Pierre-yves.
Data from four satellite altimeters are combined with the aim of improving the representation of the mesoscale variability in the Global Ocean. All missions [Jason-1, ERS-2/ENVISAT, Topex/Poseidon interleaved with Jason-1 and Geosat Follow-On] are cross-calibrated previously to produce weekly gridded maps. In areas of intense variability, the rms differences between a classical configuration of two altimeters and the scenario merging four missions can reach 10 cm and 400 cm(2)/s(2) in SLA and EKE, respectively, which represents an important percentage of the signal variance. A comparison with surface drifters shows that the four altimeter scenario improves the recovery of mesoscale structures that were not properly sampled with Jason(-1) + ERS-2/ENVISAT....
Tipo: Text
Palavras-chave: Satellite altimeters; Mesoscale variability; Global ocean.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1038.pdf

Modelling Crassostrea gigas growth and reproduction in different contrasted ecosystems by using dynamic energy budgets : generic validation of the oyster-DEB model
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bourles, Yves; Maurer, Daniele; Le Moine, Olivier; Geairon, Philippe; Mazurie, Joseph; Gangnery, Aline; Alunno-bruscia, Marianne; Pouvreau, Stephane; Goulletquer, Philippe.
Oyster farming is the main aquaculture activity in France, where Pacific oyster (Crassostrea gigas) is spatially cultured from the English Channel to the Mediterranean coasts. Oyster growth performance monitored along French coasts are widely heterogeneous among culture sites and over years. Many studies have been carried out to understand the effects of environmental factors on oyster growth and physiology, by using bioenergetics growth models. However, most of these studies were site-specific. As an example, the model developed by Barillé et al. (1997), which was extensively specified with more than 50 parameters, was validated in the Marennes-Oléron Bay, but cannot be successfully applied to other culture sites without re-estimating parameters or...
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00032/14367/11657.pdf

A new record of climate variability in the Gulf of Mexico for the last millennium
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Peterson, Larry C.
Tipo: Text
Ano: 2007
URL: https://archimer.ifremer.fr/doc/00235/34615/32961.pdf

Synthèse des flottilles de pêche 2005 - Flotte Mer du Nord-Manche-Atlantique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Leblond, Emilie; Daures, Fabienne; Berthou, Patrick; Bermell, Sylvain; Merrien, Claude; Planchot, Marie; Demaneche, Sébastien; Brigaudeau, Cécile.
This description of the French fishing fleets of the North Sea/English Channel/Atlantic for the year 2005 was done in the context of IFREMER's programme, "Information systems and observation techniques, economy and diagnostics of the evolution of resources and their use". This programme brings together projects that have ambitions specific to each. The "Fisheries Information Systems" (FIS) project constitutes the operational and multidisciplinary fisheries observatory. In addition to support for halieutic research programmes and halieutic advisory and experts' missions, the FIS project has as its mission the development of integrated indicators on fisheries and summaries meant for the various actors of the fishing sector (from researchers to the fishermen...
Tipo: Text
Palavras-chave: Fisheries Information system fishing strategy cartography fishing zones fishing gear metier hooker potter netter seiner dredger trawler Atlantic Ocean North Sea Channel French fishing fleet Atlantique Manche; Mer du Nord flottille de pêche stratégie de pêche cartographie zones de pêche métier engin SIH ligneur caseyeur fileyeur tamiseur bolincheur dragueur chalutier.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/rapport-2579.pdf

Rapport d'activité 1999 du Laboratoire Génétique et Pathologie de La Tremblade
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gerard, Andre.
Rapport d'activité 1999 du Laboratoire Génétique et Pathologie de La Tremblade.
Tipo: Text
Palavras-chave: Pathologie; Génétique; Invertébrés marins; Rapport Activité.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00071/18261/15824.pdf

Relationship of the orange tissue morphotype with shell and pearl colouration in the mollusc Pinctada margaritifera
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ky, Chin-long; Blay, Carole; Broustal, Floriane; Sham Koua, Manaarii; Planes, Serge.
Molluscs display a vast range of shell colours both between and within species. However, only a few species show colour variation in their soft tissues. In French Polynesia, the pearl oyster Pinctada margaritifera has three tissue morphotypes: the black wild-type and two rare mutations: white albino and orange mantle. Phenotypic transmission is known to occur from these phenotypes when they are used as graft donors for pearl production, leading to multicoloured and white pearls from black and albino mantle grafts, respectively. The present study furthers this knowledge by examining the phenotypic association between the orange mantle tissue morphotype and hard tissues: shells and cultured pearls. Based on a large experimental graft, shell colour...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00486/59760/62878.pdf

E-AIMS. Euro - Argo Improvements for the GMES Marine Service. R&amp;D on float technology. Synthesis. D2.6 . 1.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Reste, Serge.
This document is the synthesis of the results of WP2 work, obtained from the five experiments that were conducted with the floats deployed at sea. Task 2.1 concerns the comparison of two oxygen sensors, Task 2.2 has to test new deep floats, Task 2.3 evaluates bio-geochemical floats, Task 2.4 is dedicated to satellite transmission performance assessment andtask 2.5 concerns Arctic floats. It is the deliverable D2.61 identified in the description of work DA-1, in the table WT 2, which was initially due by the end of June 2015 (T0+30), but which was postponed to October 2015 (T0+34) (see minutes of 5thsteering committee meeting), T0 being the 1st of January 2013.
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00317/42811/42227.pdf

Four European Salmonella Typhimurium datasets collected to develop WGS-based source attribution methods
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Munck, Nanna; Leekitcharoenphon, Pimlapas; Litrup, Eva; Kaas, Rolf; Meinen, Anika; Guillier, Laurent; Tang, Yue; Malorny, Burkhard; Palma, Federica; Borowiak, Maria; Gourmelon, Michele; Simon, Sandra; Banerji, Sangeeta; Petrovska, Liljana; Dallman, Timothy J.; Hald, Tine.
Zoonotic Salmonella causes millions of human salmonellosis infections worldwide each year. Information about the source of the bacteria guides risk managers on control and preventive strategies. Source attribution is the effort to quantify the number of sporadic human cases of a specific illness to specific sources and animal reservoirs. Source attribution methods for Salmonella have so far been based on traditional wet-lab typing methods. With the change to whole genome sequencing there is a need to develop new methods for source attribution based on sequencing data. Four European datasets collected in Denmark (DK), Germany (DE), the United Kingdom (UK) and France (FR) are presented in this descriptor. The datasets contain sequenced samples of Salmonella...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00612/72437/71383.pdf

An evaluation of changes in stock productivity and consequences for management. An example based on North Atlantic albacore Thunnus alalunga
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kell, Laurence T; Fromentin, Jean-marc.
Reference points are important elements of fisheries management and the supporting scientific advisory frameworks. However, fish stocks can fluctuate extensively over a large range of spatial and temporal scales independent of human exploitation and there has been a classical tendency to assume a dichotomy, i.e., that changes in fish populations are primarily attributable either to exploitation or to environmental variability. Therefore we look at variability in surplus production and examine the relative impacts of the environment and exploitation on the productivity of North Atlantic albacore (Thunnus alalunga). The analysis revealed that variations were driven by environmental effects. It was also found that substantial variations in time-series of...
Tipo: Text
Palavras-chave: Thunnus alalunga; Albacore; Fisheries management; FLR; Reference points; Stationary processes; Surplus production.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00192/30282/28758.pdf

Statistique des pêches maritimes - Année 1909
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Tipo: Text
Ano: 1912
URL: http://archimer.ifremer.fr/doc/00162/27339/25568.pdf

Small pelagic fish feeding patterns in relation to food resource variability: an isotopic investigation for Sardina pilchardus and Engraulis encrasicolus from the Bay of Biscay (north-east Atlantic)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chouvelon, Tiphaine; Violamer, L.; Dessier, Aurelie; Bustamante, Paco; Mornet, Francoise; Pignon-mussaud, Cecilia; Dupuy, Christine.
Small pelagic fish represent an essential link between lower and upper trophic levels in marine pelagic ecosystems and often support important fisheries. In the Bay of Biscay in the north-east Atlantic, no obvious controlling factors have yet been described that explain observed fluctuations in European sardine Sardina pilchardus and European anchovy Engraulis encrasicolus stocks, in contrast to other systems. The aim of this study was therefore to investigate to which extent these fluctuations could be trophodynamically mediated. The trophic ecology of both fish species was characterised over three contrasting periods (spring 2010 and 2011 and autumn 2011) in the area, in relation to potential variation in the abundance and composition of the...
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00247/35859/34381.pdf

Temporal variability of atmospheric CO2 of the Spanish Atlantic Coast
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Perez, Fiz F; Gago, Jesus; Alvarez, Marta; Rios, Aida F.
The variability of the molar fraction of atmospheric CO2 (xCO(2)(a)) and wind speed and direction were investigated in a coastal embayment located in the west European coast, ria de Vigo, NW Spain, along daily and seasonal time scales. Observations in the ria showed that xCO(2)(a) on a short time scale presented a much wider variability than seawater molar fraction (xCO(2)(w)), in addition, a significant covariation between xCO(2)(a) and wind was found. A sluggish atmospheric renewal due to weak winds was associated with high values of xCO(2)(a), whereas higher oceanic winds renovate the air column with more stable and constrained xCO(2)(a) values (from 350 to 370 ppm). The impact of anomalously high xCO(2)(a) on CO2 air-sea fluxes is practically not...
Tipo: Text
Palavras-chave: Variabilité temporelle; CO2 atmosphérique; Échange air–mer; Côte atlantique espagnole; Temporal variability; Atmospheric CO2; Air-sea exchange; Spanish Atlantic Coast.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00322/43366/42849.pdf

Fluid emissions at the Aquitaine Shelf (Bay of Biscay, France): A biogenic origin or the expression of hydrocarbon leakage?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dupre, Stephanie; Berger, Laurent; Le Bouffant, Naig; Scalabrin, Carla; Bourillet, Jean-francois.
Fishery acoustic surveys conducted in the Bay of Biscay and dedicated to monitoring and predicting pelagic ecosystem evolution reveal numerous active seeps on the Aquitaine Shelf, east of the shelf break, at water depths ranging from 140 to 185 m. Some acoustic anomalies recorded in the water column with hull-mounted single and multibeam echosounders are clearly caused by fluid escape at the seabed, most likely gases. These fluid emissions are associated at the seafloor with high backscatter subcircular small-scale mounds, on average less than 2 m high and a few metres in diameter. Based on near-bottom video and acoustic surveys, these mounds are interpreted to be by-products of gas seepage, possibly methane-derived authigenic carbonates. The spatial...
Tipo: Text
Palavras-chave: Bay of Biscay; Aquitaine Shelf; Parentis Basin; Fluid; Seepage; Acoustics.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00201/31192/29888.pdf

Genomic organization and spatio-temporal expression of the hemoglobin genes in European sea bass (Dicentrarchus labrax)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cadiz, L.; Desmarais, E.; Servili, Arianna; Quazuguel, Patrick; Madec, Lauriane; Huelvan, Christine; Andersen, O.; Zambonino-infante, Jose-luis; Mazurais, David.
Hemoglobins (Hb) play a critical role in satisfying the oxygen demand of vertebrate aerobic metabolism. The present study reports the characterization of the European sea bass (Dicentrarchus labrax) Hb genes, including genomic organization, phylogeny, and spatio-temporal gene expression. These Hb genes are divided into two unlinked clusters, the “MN” cluster containing eleven genes (five Hbα genes named MN-Hbα1-5 and six Hbβ genes named MN-Hbβ1–6) and the “LA” cluster consisting of three genes (two Hbα genes named LA-Hbα1-2 and one Hbβ gene named LA-Hbβ1). Comparative analysis of Hb amino acid sequences indicates that most of the important amino acid residues involved in hemoglobin-oxygen binding, particularly in the Bohr and Root effects, are generally...
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00382/49349/49787.pdf

Pweevo 2012. Bilan de l’état de santé du récif par stations vidéo rotatives STAVIRO
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pelletier, Dominique; Giraud-carrier, Charlotte; Bockel, Thomas; Roman, William; Witkowski, Fanny; Powell, Abigail; Soulard, Benoit; Gonson, Charles.
• Conducted within the AMBIO project, this work deals with coral reef fish communities and associated habitats, in the New Caledonian lagoons. It relies on remote unbaited underwater video observations, using the STAVIRO rotating technique. • The study takes place in the Pouebo area, part of the New Caledonian World Heritage site, and encompassing three no-take marine reserves enclosed within a Locally Managed Area (LMA).  • The sampling design covers the entire area, and was stratified according to reef geomorphology and protection status. 86 stations were validated within 4 days. They were analyzed to characterize the habitat surrounding each station, and fish communities, based on a species list that includes fished species, emblematic species and...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00274/38522/37033.pdf

Déchets en mer et sur le fond. Sous-région marine Manche - Mer du Nord. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Galgani, Francois; Gerigny, Olivia; Henry, Maryvonne; Tomasino, Corinne.
Tipo: Text
Palavras-chave: Manche; Mer du Nord; Déchets en mer; Analyse des données; Campagnes de chalutage; Densités.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00327/43855/43429.pdf

Effect of gas hydrates melting on seafloor slope instability
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sultan, Nabil; Cochonat, Pierre; Foucher, Jean-paul; Mienert, J.
We present a theoretical study of the thermodynamic chemical equilibrium of gas hydrate in soil by taking into account the influence of temperature, pressure, pore water chemistry, and the mean pore size distribution. The model uses a new formulation based on the enthalpy form of the law of conservation of energy. The developed model shows that due to a temperature and pressure increase, hydrates may dissociate at the top of the hydrate occurrence zone to ensure a chemical equilibrium with the surrounding bulk water. This original result confirms what has been already shown through experiments. The second part of the paper presents an application of the model through a back-analysis of the giant Storegga Slide on the Norwegian margin. Two of the most...
Tipo: Text
Palavras-chave: Storegga; Slope failure; GLE; Finite difference; Methane hydrate.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-699.pdf

The role of the northward-directed (sub)surface limb of the Atlantic Meridional Overturning Circulation during the 8.2 ka event
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tegzes, A. D.; Jansen, E.; Telford, R. J.
The so-called " 8.2 ka event" is widely regarded as a major Holocene climate perturbation. It is most readily identifiable in the oxygen-isotope records from Greenland ice cores as an approximately 160-year-long cold interval between 8250 and 8090 years BP. The prevailing view has been that the cooling over Greenland, and potentially over the northern North Atlantic at least, was triggered by the catastrophic final drainage of the Agassiz-Ojibway proglacial lake as part of the remnant Laurentide Ice Sheet collapsed over Hudson Bay at around 8420 +/- 80 years BP. The consequent freshening of surface waters in the northern North Atlantic Ocean and the Nordic Seas resulted in weaker overturning, and hence reduced northward ocean heat transport. We have...
Tipo: Text
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00291/40218/38711.pdf

Compte-rendu de la campagne "Resubguy 4" (mai 1994) sur le plateau continental de la Z.E.E. guyanaise
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rose, Joel.
Le cycle biologique du principal stock de crevettes pénéïdes (Penaeus subtilis) exploité sur le plateau continental guyanais est court (18 mois environ). Les variabilités intra et inter annuelles de l'abondance des individus appartenant aux différentes composantes des premières phases du cycle (larves, post-larves, juvéniles) sont considérées comme très fortes, ce phénomène étant exacerbé par le double changement de milieu au cours du cycle, passage d'un habitat en eau salée à celui en eau douce, puis retour au premier.  La pêcherie de la flottille crevettière guyanaise est ainsi basée sur un stock au renouvellement rapide et variable, aussi l'optimisation de sa gestion implique une meilleure compréhension des mécanismes de recrutement des crevettes et...
Tipo: Text
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00076/18750/16321.pdf

L'incubation des oeufs de bar (Dicentrarchus labrax) et de daurade (Sparus aurata)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Devauchelle, Nicole.
Trois appareils destinés à l'incubation de grandes quantités d'oeufs pélagiques d'environ 1 mm de diamètre sont présentés dans ce papier. Il s'agit, dans tous les cas, d'incubations en eau courante filtrée et non recyclée. Les résultats de tests effectués sur les oeufs de bar, Dicentrarchus labrax, et de daurade, Sparus aurata, précisent les performances de chaque modèle et mettent en évidence des relations entre les taux de mortalité des oeufs embryonnés, les malformations des larves venant d'éclore et la concentration des oeufs dans les incubateurs. Il est, d'autre part, montré que le nouveau modèle d'incubateur, entraîné automatiquement dans un mouvement régulier de montée et de descente, permet à l'éleveur de s'affranchir de contrôles fréquents des...
Tipo: Text
Ano: 1984
URL: http://archimer.ifremer.fr/doc/00048/15928/13354.pdf

Etude de la variabilité de croissance d'une population d'huîtres creuses Crassostrea gigas. Bases génétiques
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Morand, Bérénice.
45
Tipo: Text
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00413/52431/53215.pdf

Les côtes de la Manche de Granville au cap de la Hague, aménagement et protection des sites
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hinschberger, F.; Clary, D.
The western Coast of the Cotentin Peninsula includes cliffs (25 km), sand dunes (100 km), and a series of intervening small estuaries known as havres. Prograding shorelines alternate with retreating shorelines (e.g. on fig. 2). Pressure by touring has recently become high on dunes, one half of them being already spoiled (fig. 3). Plans have been proposed for coastal conservation.
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/publication-6015.pdf

Bridging the gap between marine biogeochemical and fisheries sciences; configuring the zooplankton link
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mitra, Aditee; Castellani, Claudia; Gentleman, Wendy C.; Jonasdottir, Sigrun H.; Flynn, Kevin J.; Bode, Antonio; Halsband, Claudia; Kuhn, Penelope; Licandro, Priscilla; Agersted, Mette D.; Calbet, Albert; Lindeque, Penelope K.; Koppelmann, Rolf; Moller, Eva F.; Gislason, Astthor; Nielsen, Torkel Gissel; John, Michael St.
Exploring climate and anthropogenic impacts on marine ecosystems requires an understanding of how trophic components interact. However, integrative end-to-end ecosystem studies (experimental and/or modelling) are rare. Experimental investigations often concentrate on a particular group or individual species within a trophic level, while tropho-dynamic field studies typically employ either a bottom-up approach concentrating on the phytoplankton community or a top-down approach concentrating on the fish community. Likewise the emphasis within modelling studies is usually placed upon phytoplankton-dominated biogeochemistry or on aspects of fisheries regulation. In consequence the roles of zooplankton communities (protists and metazoans) linking phytoplankton...
Tipo: Text
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00213/32448/30913.pdf

La Thalassa nouveau chalutier océanographique de l'institut scientifique et technique des pêches maritimes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Le « Président-Théodore-Tissier », construit en 1933 a terminé sa longue carrière de navire de recherche en 1960. La « Thalassa» lui succède. Commandée par l'Etat, ses plans ont été étudiés et sa construction suivie par les Ingénieurs de la Direction des Affaires économiques et du Matériel naval au Secrétariat général de la Marine marchande.   Cette unité lancée aux chantiers AUGUSTTN-NORMAND du Havre, au mois de mai 1960 a été mise à la disposition de l'Institut des Pêches en novembre de la même année; elle a pu faire sa première campagne d'essais dans la Méditerranée en décembre et janvier.   Conçue en fonction des besoins nouveaux de l'océanographie et de la pêche, elle présente l'originalité d'être le premier bateau français d'un certain tonnage...
Tipo: Text
Ano: 1961
URL: http://archimer.ifremer.fr/doc/1961/publication-4251.pdf

Variable Ni isotope fractionation between Fe-oxyhydroxides and implications for the use of Ni isotopes as geochemical tracers
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gueguen, Bleuenn; Sorensen, Jeffry V.; Lalonde, Stefan; Pena, Jasquelin; Toner, Brandy M.; Rouxel, Olivier.
Nickel (Ni) isotopes have recently emerged as a new biogeochemical tracer in marine environments, but our understanding of the mechanisms of Ni isotope fractionation in natural systems with regards to its fractionation by mineral surfaces is incomplete. This study aims to provide experimental constraints on Ni isotope fractionation during adsorption to goethite and 2-line ferrihydrite, two Fe minerals that vary in terms of distinct crystalline properties. We conducted two types of adsorption experiments: one with variable pH (5.0 to 8.0) and constant initial Ni concentration, one at a constant pH of 7.7 and variable initial Ni concentrations. Isotopic measurements were made on both the solid phase and the supernatant solutions in order to determine the Ni...
Tipo: Text
Palavras-chave: Fe-oxyhydroxides; Sorption experiments; Nickel isotopes.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00423/53473/56649.pdf

Feeding behaviour of Paracentrotus lividus in the presence of Caulerpa taxifolia introduced in the Mediterranean Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lemee, R; Boudouresque, Cf; Gobert, J; Malestroit, Pascale; Mari, X; Meinesz, A; Menager, V; Ruitton, S.
Experiments in aquaria have shown that the feeding behaviour of the sea urchin Paracentrotus lividus in presence of the green alga Caulerpa taxifolia varies during the year. In summer, the alga is strongly avoided and is not consumed. in winter and spring, although the alga is only moderately appreciated, its consumption is significant, but it is hardly or not at all absorbed. These results are confirmed by content analysis of the digestive tract of P. lividus sampled in situ in an area colonized by C. taxifolia. The sea urchins' feeding behaviour is linked to the presence of toxic and repellent secondary metabolites of C. taxifolia, caulerpenyne in particular.
Tipo: Text
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00094/20483/18153.pdf

Climatic cycles as expressed in sediments of the PROMESS1 borehole PRAD1-2, central Adriatic, for the last 370 ka: 1. Integrated stratigraphy - art. no. Q01R01
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Piva, A; Asioli, A; Schneider, R; Trincardi, F; Andersen, N; Colmenero Hidalgo, E; Dennielou, Bernard; Flores, J; Vigliotti, L.
[1] A multiproxy integrated chronological framework, based on oxygen and carbon stable isotope stratigraphy, biostratigraphy (foraminifera and nannoplankton bioevents and foraminifer assemblage-based climate cyclicity), magnetostratigraphy, sapropel stratigraphy, and C-14 AMS radiometric dates, has been achieved for borehole PRAD1-2, collected in 185.5 m water depth in the central Adriatic. This work was carried out within the European Community project Profiles across Mediterranean Sedimentary Systems (PROMESS1). The 71.2 m long borehole spans a time interval between late MIS 11 and MIS 1 (the last 370 ka), showing a chronological resolution of 500 and 250 years per cm during interglacial and glacial intervals, respectively. At present, this record is the...
Tipo: Text
Palavras-chave: Sapropel stratigraphy; Adriatic Sea; D O events; Foraminifera; Oxygen isotope stratigraphy; Late Quaternary.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-3605.pdf

On the Importance to Acknowledge Transposable Elements in Epigenomic Analyses
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lerat, Emmanuelle; Casacuberta, Josep; Chaparro, Cristian; Vieira, Cristina.
Eukaryotic genomes comprise a large proportion of repeated sequences, an important fraction of which are transposable elements (TEs). TEs are mobile elements that have a significant impact on genome evolution and on gene functioning. Although some TE insertions could provide adaptive advantages to species, transposition is a highly mutagenic event that has to be tightly controlled to ensure its viability. Genomes have evolved sophisticated mechanisms to control TE activity, the most important being epigenetic silencing. However, the epigenetic control of TEs can also affect genes located nearby that can become epigenetically regulated. It has been proposed that the combination of TE mobilization and the induced changes in the epigenetic landscape could...
Tipo: Text
Palavras-chave: Transposable element; Epigenomics; Bioinformatic tools.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00487/59900/63082.pdf

Linking Capacity Development to GOOS Monitoring Networks to Achieve Sustained Ocean Observation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bax, Nicholas J.; Appeltans, Ward; Brainard, Russell; Duffy, J. Emmett; Dunstan, Piers; Hanich, Quentin; Davies, Harriet Harden; Hills, Jeremy; Miloslavich, Patricia; Muller-karger, Frank Edgar; Simmons, Samantha; Aburto-oropeza, O.; Batten, Sonia; Benedetti-cecchi, Lisandro; Checkley, David; Chiba, Sanae; Fischer, Albert; Garcia, Melissa Andersen; Gunn, John; Klein, Eduardo; Kudela, Raphael M.; Marsac, Francis; Obura, David; Shin, Yunne-jai; Sloyan, Bernadette; Tanhua, Toste; Wilkin, John.
Developing enduring capacity to monitor ocean life requires investing in people and their institutions to build infrastructure, ownership, and long-term support networks. International initiatives can enhance access to scientific data, tools and methodologies, and develop local expertise to use them, but without ongoing engagement may fail to have lasting benefit. Linking capacity development and technology transfer to sustained ocean monitoring is a win-win proposition. Trained local experts will benefit from joining global communities of experts who are building the comprehensive Global Ocean Observing System (GOOS). This two-way exchange will benefit scientists and policy makers in developing and developed countries. The first step toward the GOOS is...
Tipo: Text
Palavras-chave: Capacity development; Technology transfer; Global ocean observing system; GOOS; Monitoring; Essential ocean variables; International reporting; SDG14.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00626/73776/74930.pdf

Publications 2012 exploitant des données issues de campagnes à la mer - Données bibliométriques
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bouilde, Marielle; Merceur, Frederic.
Ce document a pour objectif de proposer un ensemble de données bibliométriques sur les articles co-publiés en 2012 par des équipes françaises ou étrangères, qui font références à des campagnes effectuées sur un des navires de la flotte côtière et hauturière de l’Ifremer, de l’ISTPM et du CNEXO.
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00135/24661/22701.pdf

Antarctic, Sub-Antarctic and cold temperate echinoid database
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pierrat, Benjamin; Saucede, Thomas; Festeau, Main; David, Bruno.
This database includes spatial data of Antarctic, Sub-Antarctic and cold temperate echinoid distribution (Echinodermata: Echinoidea) collected during many oceanographic campaigns led in the Southern Hemisphere from 1872 to 2010. The dataset lists occurrence data of echinoid distribution south of 35 degrees S latitude, together with information on taxonomy (from species to genus level), sampling sources (cruise ID, sampling dates, ship names) and sampling sites (geographic coordinates and depth). Echinoid occurrence data were compiled from the Antarctic Echinoid Database (David et al. 2005a), which integrates records from oceanographic cruises led in the Southern Ocean until 2003. This database has been upgraded to take into account data from oceanographic...
Tipo: Text
Palavras-chave: Southern Ocean; Echinoids; Antarctic species; Sub-Antarctic species; Cold temperate species.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00296/40763/39773.pdf

A preliminary genetic linkage map for the European flat oyster Ostrea edulis L.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lallias, Delphine; Lapegue, Sylvie; Harley, Crhis; Boudry, Pierre; Heurtebise, Serge; Beaumont, Andy.
The flat oyster Ostrea edulis is the species endemic to European coasts, both Atlantic and Mediterranean. It has been exploited since Roman times, but its aquaculture production decreased from around 20000 tons in the 1950's to 1500 tons today because of two successive diseases due to the intracellular parasites Marteilia refringens and Bonamia ostreae. Since 1985, Ifremer has been undertaking a breeding program to produce families of oysters tolerant to Bonamia. In this context, a further step would be to identify QTLs for resistance to this parasite. Therefore, as a first step a genetic map is now being built. The establishment of a genetic linkage map will provide a foundation for the mapping of QTLs, with the ultimate objective to implement...
Tipo: Text
Palavras-chave: QTLs; Ostrea edulis; Flat oyster; Genetic linkage map; Genetic.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/acte-3466.pdf

Observations de fronts internes dans le détroit de Gibraltar pendant la campagne océanographique OTAN 1970 et interprétation des résultats par un modèle mathématique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cavanie, Alain.
MM. Lacombe, Frassetto and Ziegenbeim's observations, based on different measurement methods, demonstrated the existence of inner fronts and short period oscillations at the interface separating the Atlantic and Mediterranean waters in the eastern part of the Gibraltar straight. These observations show that inner fronts are created by the following mechanism: during the incoming tide, the westward current pushes the Mediterranean waters against the threshold of Gibraltar and, when getting to high tide, when the tide current becomes null, the interface is far from a balanced position, too high to the east, too low to the west of the threshold. The density currents caused by this imbalance creates an inner front of amplitude of more than 50 m which moves...
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1972
URL: http://archimer.ifremer.fr/doc/1972/publication-4896.pdf

Evaluation par vidéo (STAVIRO) de l’état des peuplements ichtyologiques d’intérêt halieutique du Parc Naturel Marin de Mayotte
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Roos, David; Gaboriau, Matthias; Giannasi, Paul; Maurel, Laurence; Pelletier, Dominique.
Les diagnostics des peuplements de poisson d’intérêt halieutique et des principaux stocks mettent en évidence des états contrastés à Mayotte en 2017. A l’échelle des peuplements, toutes espèces confondues, aucun signe patent d’un état non satisfaisant lié à la pression de pêche exercée n’a été observé. Cette situation s’explique en grande partie par les familles les plus diversifiées et les plus abondantes, souvent herbivores, tels que les poissons chirurgiens et les perroquets, dont l’état est jugé satisfaisant. En revanche, l’état des quatre principales familles de grands carnivores (les mérous, les vivaneaux, les capitaines et les carangues) est qualifié de non satisfaisant. La raréfaction des grandes espèces, voire la perte de diversité dans les...
Tipo: Text
Palavras-chave: État initial; Évaluation; Peuplement ichtyologique; Stock; Vidéo; STAVIRO; Abondance; Richesse spécifique; Ressources halieutiques; Poisson; Habitat corallien; Lagon; Récif; Mayotte.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00485/59659/71413.pdf

Notes sur l'aménagement de l'aire maritime, de 0 à 60 m de profondeur du Cap de l'Aigle au Cap Cepet-Sud de Toulon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Blanc, J.; Muschotti, E.
La région étudiée s'étend du Sémaphore de la Ciotat au cap Cépet, au Sud de la ville de Toulon. A l'exception du secteur situé au Sud du Bec de l'Aigle, (où la cartographie a été menée jusqu'à -120 m, par L = 43°05'N) l'isobathe 60 m a constitué notre limite inférieure (1). Ce travail a porté, de l'Ouest à l'Est, sur les littoraux suivants : - baie de la Ciotat, - côte accore de la Pointe Grenier à la Pointe des Engraviers, - baie de Bandol, limitée au Sud par la Pointe de la Cride, - baie de Sanary et archipel des Embiez, dans la partie méridionale, - côte accore de Sicié jusqu'à la plage des Sablettes, - littoral méridional de la presqu'île de Saint Handrier jusqu'au cap Cépet.
Tipo: Text
Ano: 1973
URL: http://archimer.ifremer.fr/doc/00104/21503/19084.pdf

Effets d’une alimentation végétale sur la biosynthèse des acides gras et le métabolisme du bar européen (Dicentrarchus labrax)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Geay, Florian.
In the context of the fish farming industry needing to substitute the animal food (meal and oil) by vegetable ingredients, the main objective of this thesis was to study the long-term effects of a diet exclusively composed by plant products on the metabolism of the european sea bass (Dicentrarchus labrax) and more particularly, on its capacity to biosynthesis the Highly Unsaturated Fatty Acids (HUFA) from the PolyUnsaturated Fatty acids (PUFA) brought by this vegetal diet. Our transcriptomic approaches showed that the use of a plant food disrupted the lipids metabolism (cholesterol and fatty acids) and the energy metabolism (carbohydrates, amino acids) in the liver, but also affected other physiological processes such as the immune system. In spite of the...
Tipo: Text
Palavras-chave: Aquaculture; Nutrition; Métabolisme; Lipides; Désaturase; Delat-6-désaturase (D6D); Huile végétale; Farine végétale; Acides gras à longues chaînes carbonées polyinsaturés (AGLPI); Aquaculture; Nutrition; Metabolism; Lipids; Desaturase; Fatty acids desaturase 2 (fads2); Vegetable oil; Vegetable meal; Highly unsaturated fatty acids (HUFA).
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00048/15925/13352.pdf

Effets de la guerre sur la constitution des stocks de poissons
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Letaconnoux, R.
Le présent travail consiste en l’élaboration de statistiques permettant de comparer la situation de la pêche avant et après guerre, conformément à la décision prise en 1946 par le Conseil International pour l’Exploration de la Mer. L’unité de comparaison choisie est la pêche d’un chalutier hauturier du port de La Rochelle au cours d’une sortie de douze jours environ. Les statistiques ainsi obtenues portent sur la moyenne des années 1937—1939 d’une part et sur l’année 1946 d’autre part. En plus de la moyenne annuelle nous avons également établi la moyenne mensuelle des apports ce qui permet de mieux comparer le rendement de la pêche des espèces saisonnières. Nous avons également tenu compte du pourcentage que chaque catégorie de poissons représente dans la...
Tipo: Text
Ano: 1948
URL: http://archimer.ifremer.fr/doc/00293/40468/39200.pdf

Seedling production of Atlantic bluefin tuna (ABFT) Thunnus thynnus. The selfdott project
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: De La Gandara, Fernando; Mylonas, Constantinos C.; Coves, Denis; Ortega, Aurelio; Bridges, Christopher R.; Belmonte Rios, Antonio; Vassallo-agius, Robert; Papandroulakis, Nikos; Rosenfeld, Hanna; Tandler, A; Medina, Antonio; Demetrio, A; Corriero, Aldo; Fauvel, Christian; Falcon, Jack; Sveinsvoll, K; Ghysen, Alain; Deguara, S; Gordin, Hillel.
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00029/14015/11205.pdf

Description d'ixoreis psychropotae, nov. gen., nov. sp., coccidie parasite du tube digestif de l'holothurie abyssale psychropotes longicauda theel
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Massin, C; Jangoux, M; Sibuet, Myriam.
This paper describes some stages of gametogony and sporogony of Ixoreis psychropotae ng. nsp., hemal and digestive sporozoan parasite of the abyssal holothurian Psychropotes longicauda.Through the trophozoïte development, this sporozoan is closely related to Coccidia. The uninucleate sporoblasts are formed out of the nuclei that appear on the copula's surface. The cysts, extremely numerous in certain areas, have n sporokysts containing each 2 sporozoïtes.The possibilities of cyts' elimination are discussed. [NOT CONTROLLED OCR]
Tipo: Text
Ano: 1978
URL: http://archimer.ifremer.fr/doc/1978/publication-5189.pdf

De novo assembly, characterization and functional annotation of Senegalese sole (Solea senegalensis) and common sole (Solea solea) transcriptomes: integration in a database and design of a microarray
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Benzekri, Hicham; Armesto, Paula; Cousin, Xavier; Rovira, Mireia; Crespo, Diego; Alejandro Merlo, Manuel; Mazurais, David; Bautista, Rocio; Guerrero-fernandez, Dario; Fernandez-pozo, Noe; Ponce, Marian; Infante, Carlos; Zambonino, Jose Luis; Nidelet, Sabine; Gut, Marta; Rebordinos, Laureana; Planas, Josep V.; Begout, Marie-laure; Gonzalo Claros, M.; Manchado, Manuel.
Background Senegalese sole (Solea senegalensis) and common sole (S. solea) are two economically and evolutionary important flatfish species both in fisheries and aquaculture. Although some genomic resources and tools were recently described in these species, further sequencing efforts are required to establish a complete transcriptome, and to identify new molecular markers. Moreover, the comparative analysis of transcriptomes will be useful to understand flatfish evolution. Results A comprehensive characterization of the transcriptome for each species was carried out using a large set of Illumina data (more than 1,800 millions reads for each sole species) and 454 reads (more than 5 millions reads only in S. senegalensis), providing coverages ranging from...
Tipo: Text
Palavras-chave: Soles; Transcriptome; Microarray; Orthology; Molecular markers; SoleaDB.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00238/34918/33626.pdf

Effects of a sewage plume on the biology, optical characteristics, and particle size distributions of coastal waters
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Petrenko, Aa; Jones, Bh; Dickey, Td; Lehaitre, Michel; Moore, C.
The effect of a sewage plume on the biology, optical characteristics, and particle size distributions of coastal waters was evaluated around the Sand Island, Hawaii, outfall diffuser. In situ physical and biooptical data and Niskin bottle samples were collected during a 1-week cruise from September 25 to October 1, 1994. One or two layers affected by sewage could be distinguished in the water column: recently discharged (''new'') sewage plume waters and ''old'' plume waters. In conditions characterized by high Froude number the distribution of chlorophyll fluorescence in new plume waters was the same as for ambient waters, while for low Froude number, chlorophyll fluorescence increased within the plume, demonstrating the importance of physical forcing on...
Tipo: Text
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00335/44647/57346.pdf

Middle to late miocene marine ecostratigraphy - clay-minerals, planktonic-foraminifera and stable isotopes from sicily
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chamley, H; Meulenkamp, Je; Zachariasse, Wj; Vanderzwaan, Gj.
Tipo: Text
Ano: 1986
URL: http://archimer.ifremer.fr/doc/00110/22111/19749.pdf

Effects of biological, economic and management factors on tuna and billfish stock status
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pons, Maite; Branch, Trevor A.; Melnychuk, Michael C.; Jensen, Olaf P.; Brodziak, Jon; Fromentin, Jean-marc; Harley, Shelton J.; Haynie, Alan C.; Kell, Laurie T.; Maunder, Mark N.; Parma, Ana M.; Restrepo, Victor R.; Sharma, Rishi; Ahrens, Robert; Hilborn, Ray.
Commercial tunas and billfishes (swordfish, marlins and sailfish) provide considerable catches and income in both developed and developing countries. These stocks vary in status from lightly exploited to rebuilding to severely depleted. Previous studies suggested that this variability could result from differences in life-history characteristics and economic incentives, but differences in exploitation histories and management measures also have a strong effect on current stock status. Although the status (biomass and fishing mortality rate) of major tuna and billfish stocks is well documented, the effect of these diverse factors on current stock status and the effect of management measures in rebuilding stocks have not been analysed at the global level....
Tipo: Text
Palavras-chave: Fisheries management; Marine conservation; Stock assessment; Stock status; Tuna fisheries.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00333/44383/44107.pdf

SeaDataCloud Temperature and Salinity Historical Data Collections for the North Sea (Version 1)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Scory, Serge; Simoncelli, Simona.
The SeaDataCloud Temperature and Salinity Historical Data Collection for the North Sea includes open access in situ data on temperature and salinity for the period 1893 – 2017. The data were retrieved from the SeaDataNet infrastructure at the end of October 2017. The dataset format is ODV binary collections [3]. The quality control of the data has been performed with the help of ODV software. Data Quality Flags have been revised following common recommended procedures defined under SeaDataNet 2 project [2] in conjunction with visual expert check. Trajectories (“underway” data) and “discrete” data (CTD, XBT, discrete water samplers) have been handled separately.
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00462/57330/59428.pdf

Compte-rendu des journées de la surveillance de la santé des mollusques marins 2013
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Garcia, Celine; Francois, Cyrille; Renault, Tristan; Lupo, Coralie.
Les 12 et 13 novembre 2013, les journées de la surveillance de la santé des mollusques marins ont rassemblé les acteurs de la santé des mollusques marins (Ifremer, DGAl, DPMA, DDTM, CNC, CRC, laboratoires d'analyses agréés et reconnus, centres techniques). Les objectifs de cette réunion étaient de faire un bilan des activités 2013 du Laboratoire National de Référence (LNR), des réseaux de surveillance (REPAMO) et d'Observation (RESCO et réseaux de centres techniques).
Tipo: Text
Palavras-chave: Réseau Surveillance; Mollusques marins; Maladie; Organismes pathogènes; Détection.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00170/28146/26371.pdf

Additional experiments on the growth of juveniles and fingerlings of the european sea bass (dicentrarchus labrax L.)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chervinski, Jonathan; Shapiro, James.
Laboratory experiments were conducted with juvenile Dicentrarchus labrax L. in order to determine their ability to grow and develop in fresh water on small zooplankton and zoobenthos. Fish of 0.036g. weight were able to grow on small Cladocera and Copepods. Juveniles of 25-29mm total length were able to feed on fry of Sarotherodon sp. D. labrax of 0.77g weight, fed Sarotherodon sp. showed an individual growth rate of 0.06-0.11 g/day and a food conversion rate of 8.18 when raised to the size of 3.57g. [NOT CONTROLLED OCR]
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1980
URL: http://archimer.ifremer.fr/doc/1980/publication-5383.pdf

Interannual and Seasonal Variations in Ecosystem Transpiration and Water Use Efficiency in a Tropical Rainforest
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Aguilos, Maricar; Stahl, Clement; Burban, Benoit; Herault, Bruno; Courtois, Elodie; Coste, Sabrina; Wagner, Fabien; Ziegler, Camille; Takagi, Kentaro; Bonal, Damien.
Warmer and drier climates over Amazonia have been predicted for the next century with expected changes in regional water and carbon cycles. We examined the impact of interannual and seasonal variations in climate conditions on ecosystem-level evapotranspiration (ET) and water use efficiency (WUE) to determine key climatic drivers and anticipate the response of these ecosystems to climate change. We used daily climate and eddyflux data recorded at the Guyaflux site in French Guiana from 2004 to 2014. ET and WUE exhibited weak interannual variability. The main climatic driver of ET and WUE was global radiation (Rg), but relative extractable water (REW) and soil temperature (Ts) did also contribute. At the seasonal scale, ET and WUE showed a modal pattern...
Tipo: Text
Palavras-chave: Tropical rainforest; Evapotranspiration; Water use efficiency; Drought; Radiation.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00484/59572/62542.pdf

Validation of Jason and Envisat Altimeter Dual Frequency Rain Flags
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tournadre, Jean.
New rain flags based on the dual frequency capabilities of the new Jason Poseidon-2 and Envisat RA2 altimeters have been tested, developed and adopted for the operational processing of the altimeter data. Their validation conducted during the calibration/validation phases of the satellites is presented here. The Jason flag is validated by comparison with the TOPEX one, using the Tandem mission. The results show a very good agreement between the two sensors and the two rain flags The Envisat flag is validated by comparison with both Jason and TOPEX using global and collocated data sets. The results show similar performances for the three sensors. The f relations estimated during the calibration-validation period and presented here have been given to the...
Tipo: Text
Palavras-chave: Dual Frequency; Rain Flag; Altimeters; Envisat; Jason.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-419.pdf

Body size-trophic position relationship in marine fish depends on biological and spatial scales
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kopp, Dorothee; Lefebvre, Sebastien; Villanueva, Ching-maria; Ernande, Bruno.
-Food web structure can be partly characterized by species' trophic level - In marine fish, trophic level appears positively correlated to individual body size at the community scale (Jennings et al 2001) -Trophic level may change across sizes but also taxa, seasons, and habitats -Very few studies have addressed how size-dependence of trophic position varies in space, i.e. according to habitat, and whether observed community-scale patterns hold at the level of species or guilds.
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00163/27396/25627.pdf

Topographic generation of submesoscale centrifugal instability and energy dissipation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gula, Jonathan; Molemaker, Maarten Jeroen; Mcwilliams, James C.
Most of the ocean kinetic energy is contained in the large scale currents and the vigorous geostrophic eddy field, at horizontal scales of order 100 km. To achieve equilibrium the geostrophic currents must viscously dissipate their kinetic energy at much smaller scale. However, geostrophic turbulence is characterized by an inverse cascade of energy towards larger scale, and the pathways of energy toward dissipation are still in question. Here, we present a mechanism, in the context of the Gulf Stream, where energy is transferred from the geostrophic flow to submesoscale wakes through anticyclonic vertical vorticity generation in the bottom boundary layer. The submesoscale turbulence leads to elevated local dissipation and mixing outside the oceanic...
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00357/46814/46679.pdf

Impact of the small-scale elongated filaments on the oceanic vertical pump
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lapeyre, Guillaume; Klein, Patrice.
Oceanic mesoscale eddies (with a diameter of 50-100 km) are known to be associated with significant vertical tracer fluxes in the upper few hundred meters. In particular, they are important for the biogeochemical system, accounting for 20-30% of the vertical nutrient transport. However, estimates of the global tracer fluxes neglect the role played by thin elongated filaments (with a width of 5-10 km). These sub-mesoscale structures are produced by eddy interactions and ubiquitous in regions between eddies. We use a Surface Quasi-Geostrophic model to quantify their impact on the net vertical tracer flux into the surface layers. We show that eddy interactions are an important source of tracer injection because they lead to the production of filaments and to...
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2459.pdf

Pre-purification by membrane filtration of paralytic shellfish toxins from Alexandrium minutum dinoflagellate
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Balti, Rafik; Brodu, Nicolas; Zhang, Jiaxuan; Amzil, Zouher; Drouin, Delphine; Sechet, Veronique; Masse, Anthony.
The Paralytic shellfish neurotoxins (PST) are of increasing interest for biomedical applications. The chemical synthesis is often complex and expensive that’s why the purification by membrane filtration of PST from Alexandrium minutum dinoflagellate was investigated. Disrupted micro-alga cells by ultrasonic treatment were diafiltred to let pass toxins through an ultrafiltration membrane. Then, the mean permeate was concentrated and diafiltrated by nanofiltration. Mean permeate fluxes equal to 187, 135 and 135 L.h–1.m-2 were obtained during the first diafiltration, the concentration step and the final diafiltration respectively. Up to 57 % (mol/mol) and 78 % (mol/mol) of organic matters and salts were removed respectively. Divalent ions were sparsely...
Tipo: Text
Palavras-chave: Paralytic shellfish poisoning; Nanofiltration; Membrane; Alexandrium minutum; Purification.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00451/56286/57865.pdf

Recent multivariate changes in the North Atlantic climate system, with a focus on 2005-2016
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Robson, Jon; Sutton, Rowan T.; Archibald, Alex; Cooper, Fenwick; Christensen, Matthew; Gray, Lesley J.; Holliday, N. Penny; Macintosh, Claire; Mcmillan, Malcolm; Moat, Ben; Russo, Maria; Tilling, Rachel; Carslaw, Ken; Desbruyeres, Damien; Embury, Owen; Feltham, Daniel L.; Grosvenor, Daniel P.; Josey, Simon; King, Brian; Lewis, Alastair; Mccarthy, Gerard D.; Merchant, Chris; New, Adrian L.; O'Reilly, Christopher H.; Osprey, Scott M.; Read, Katie; Scaife, Adam; Shepherd, Andrew; Sinha, Bablu; Smeed, David; Smith, Doug; Ridout, Andrew; Woollings, Tim; Yang, Mingxi.
Major changes are occurring across the North Atlantic climate system, including in the atmosphere, ocean and cryosphere, and many observed changes are unprecedented in instrumental records. As the changes in the North Atlantic directly affect the climate and air quality of the surrounding continents, it is important to fully understand how and why the changes are taking place, not least to predict how the region will change in the future. To this end, this article characterizes the recent observed changes in the North Atlantic region, especially in the period 2005–2016, across many different aspects of the system including: atmospheric circulation; atmospheric composition; clouds and aerosols; ocean circulation and properties; and the cryosphere. Recent...
Tipo: Text
Palavras-chave: Atmosphere; Atmospheric composition; Cryosphere; Observations; Ocean; North atlantic.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00454/56606/58298.pdf

Chronic oyster mortality in summer in the Bay of Marennes-Oleron; field and laboratory experiments
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bakker, Aletta Catharine.
Oyster culture is of great economic value for France. A large part of oyster production is situated in the Southwest of France, in the Bay of Marennes-Oléron. The last 20 years a phenomenon called summer mortality of the oyster species Crassostrea gigas occurs in the bay. A high percentage of the oysters die during the spring and summer when maturation takes place. Pollution, predation and iIlness seem not the primai cause of summer mortality in the Bay of Marennes-Oléron. Neither can overstocking problems explain the occurring mortalities. Two different culture types are used in the bay. The first is seeding the oysters on the sediment (on bottom culture), the second is placing the oysters in bags on tables made of iron bars (on table culture). 1 compared...
Tipo: Text
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00411/52291/53042.pdf

Collecting and gridding complementary in-situ SST/SSS data for the calibration and validation of SMOS
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Brion, Emilie; Gaillard, Fabienne; Petit De La Villeon, Loic; Delcroix, Thierry; Alory, Gael; Reverdin, Gilles.
Providing reliable in-situ surface temperature and salinity data over the global ocean within short delay is critical for the calibration and validation of the recently launched Soil Moisture and Ocean Salinity Satellite (SMOS). The work presented here has been undertaken as a contribution to GLOSCAL (Global Ocean Surface Salinity Calibration and Validation), retained as one of the ESA CalVal Projects. Based on the Coriolis datasets and using In Situ Analysis System (ISAS) tool, a near real time analysis system has been developed. It provides gridded fields of sea surface salinity and temperature and the corresponding in-situ dataset. In addition to research activities, these products would be used to help the quality control of SMOS satellite data, and to...
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00114/22548/20229.pdf

Microflore et anchoitage.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Campello, Francois.
The author studies the microbial phenomena which occur during the maturation of French anchovies, some from the Basque, the others from the Roussillon coast. There are some differences in relation with the origin of the fishes. On a marine agar, the microflora of the Mediterranean ones is almost constant or in a light diminution while that of the Atlantic ones is climbing during 9 weeks before a decline. On an extremely salted agar and in the both origins the archaebacteria are increasing in number during 5 to 6 weeks and diminishing before. The complete ripening is obtained within 16-17 weeks. The limits of the significance of the microbiological analysis are discussed.
Tipo: Text
Palavras-chave: MED; France; ANE; Clupeidae; Pisces; Engraulis encrasicolus; Microorganisms; Curing; Processing fishery products.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/publication-1826.pdf

Lymphocystis outbreaks in farmed sea bream, Sparus aurata, first report on French Mediterranean coast
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Deuff, Rose-marie; Renault, Tristan.
Among the Iridovirus related infections frequently described on many teleosts fish species, Viral Erythrocytic Necrosis (VEN) (Pinto et al., 1989), Epizootic Haematopoietic Necrosis Virus (EHNV) (Langdon et al., 1988) as weil as Lymphocystis Disease Virus (LDV) are not considered to directly cause fatality. Indeed, Lymphocystis outbreaks of farmed fish could be observed in some cases, as a consequence of a bacterial double infection or cannibalism (Ahne ef al., 1991; Moate et al., 1992). Here, we report for the first time a strong LDV infection, and an additional physical stress responsible for mortalities of reared sea bream, Sparus aurata, from Toulon area, on French Mediterranean coast. Although, since the first report of Lymphocystis in sea bream under...
Tipo: Text
Palavras-chave: Mortalities; Sparus aurata; Fish; Iridovirus.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/1993/publication-2886.pdf

Determinisme du comportement associatif des poissons pelagiques: les hypotheses a l'epreuve des faits
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Freon, Pierre; Dagorn, Loeiz.
No abstract.
Tipo: Text
Palavras-chave: Attracting techniques; Behaviour; Ecological associations; Pelagic fisheries.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00042/15322/12661.pdf

Evolution of upper layer temperature in the Bay of Biscay during the last 40 years
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Michel, Sylvain; Vandermeirsch, Frederic; Lorance, Pascal.
The temperature evolution over the past 40 years in the Bay of Biscay (North-East Atlantic) is investigated from an in situ data analysis, completed with a satellite SST (Sea Surface Temperature) analysis over the last 20 years. The in situ dataset is an interannual version of the BoByClim climatology, covering the Bay of Biscay area with a 10-km horizontal resolution and a 5-m vertical step. The satellite dataset is the European COastral Sea Operational Observing and Forcast System Program (ECOOP) daily analysis, covering the IBIROOS (Iberian-Biscay-Irish Sea) area with a 4-km resolution. The study area (43 degrees N-50 degrees N/12 degrees W-1 degrees W) extends over the intersection of the domains covered by these two analyses. In the 0-200 m layer of...
Tipo: Text
Palavras-chave: Upper layer; Climatic change; Air sea flux; Ocean circulation model; Satellite and in situ measurements; Ecosystem; Bay of Biscay.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00000/11166/7519.pdf

Pockmark formation and evolution in deep water Nigeria: Rapid hydrate growth versus slow hydrate dissolution
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sultan, Nabil; Bohrmann, G.; Ruffine, Livio; Pape, T.; Riboulot, Vincent; Colliat, J. -l.; De Prunele, Alexis; Dennielou, Bernard; Garziglia, Sebastien; Himmler, Tobias; Marsset, Tania; Peters, C. A.; Rabiu, A.; Wei, J.
In previous works, it has been suggested that dissolution of gas hydrate can be responsible for pockmark formation and evolution in deep water Nigeria. It was shown that those pockmarks which are at different stages of maturation are characterized by a common internal architecture associated to gas hydrate dynamics. New results obtained by drilling into gas hydrate-bearing sediments with the MeBo seafloor drill rig in concert with geotechnical in situ measurements and pore water analyses indicate that pockmark formation and evolution in the study area are mainly controlled by rapid hydrate growth opposed to slow hydrate dissolution. On one hand, positive temperature anomalies, free gas trapped in shallow microfractures near the seafloor and coexistence of...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00188/29913/28373.pdf

Patch reef: a functional hotspot of tropical fishes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Jac, Cyrielle; Dupont, Priscilla; Gaboriau, Matthias; Mercky, Yann; Pelletier, Dominique; Roos, David; Sucre, Elliott; Claverie, Thomas.
In days of increasingly threatened marine tropical ecosystems, it is important to improve knowledge on understudied but taxonomically rich habitats. If fish assemblages from barrier and fringing reefs are generally well studied, patch reefs are much less known. The objective of the present study (part of the EPICURE project) was to better understand taxonomic and functional specificity of patch reefs fish assemblages compared to the well-studied subtidal reef flat and outer slope habitats. Unbaited rotating video systems (STAVIRO) were used to quantify fish abundance on two sitesfrom the northern Mozambic channel (Mayotte Iris bank and Geyser bank). Taxonomic and functional diversity metrics were used to compare assemblages among habitats. None of the...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00614/72586/71574.pdf

Reduced n-3 highly unsaturated fatty acids dietary content expected with global change reduces the metabolic capacity of the golden grey mullet
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vagner, Marie; Zambonino-infante, Jose-luis; Mazurais, David; Imbert Auvray, Nathalie; Ouillon, Natascha; Dubillot, Emmanuel; Le Delliou, Herve; Akbar, David; Lefrancois, Christel.
In this study, we hypothesised that a reduction in n-3 HUFA availability for higher consumers, as expected with global change, would negatively impact the physiological performances of fish. The aim was to experimentally evaluate the effect of n-3 HUFA dietary content on cardio-respiratory performances of the golden grey mullet (Liza aurata), a microalgae grazer of high ecological importance in European coastal areas. These performances were evaluated in terms of critical swimming speed U (crit), associated oxygen consumption MO2, post-exercise oxygen consumption and calcium fluxes in cardiomyocytes. Two replicated groups of fish were fed on a rich (standard diet, SD diet: 1.2 % n-3 HUFA on dry matter basis, DMB) or a poor n-3 HUFA (low n-3 HUFA diet, LD...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00236/34752/33142.pdf

Salinity balance in the tropical Pacific off Mexico
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Portela Rodriguez, Esther; Beier, Emilio; Barton, Eric D.; Sánchez-velasco, Laura.
A simplified analytical model was used to solve the salinity balance equation and study the relative contributions of freshwater flux and salt advection to the salinity tendency between the Gulf of Tehuantepec and Cabo Corrientes (14‐22°N). The model used climatological mixed‐layer salinity, satellite‐derived geostrophic velocity and evaporation minus precipitation data in a four‐domain scheme. The mean circulation derived from the model largely coincides with previous reports and suggests that, in the steady state, the Mexican Coastal Current (MCC) is decoupled from the Tehuantepec region. The analysis of the time‐dependent variability showed that the salt advection can be largely explained by the annual variations of the alongshore velocity...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00451/56272/57845.pdf

Rapid and sensitive detection of ostreid Herpesvirus 1 in oyster samples by real-time PCR (Poster)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pepin, Jean-francois; Riou, Antoine; Renault, Tristan.
Herpes and herpes-like virus infections have been reported in various marine mollusc species associated with high mortality rates. Following the characterisation and genome sequencing of ostreid herpesvirus 1 (OsHV-1), specific diagnostic tools have been developed based on conventional PCR techniques or in situ hybridisation. We have now developed a real-time PCR assay for rapid, sensitive and quantitative detection of OsHV-1, and compared it with a conventional PCR technique described previously. The new assay utilised SYBR® Green chemistry with specific primers C9/C10 targeting the C region, which is present in two copies in the OsHV-1 genome and encodes two proteins of unknown function. The assay was applied successfully to rapid diagnosis (100 minutes)...
Tipo: Text
Palavras-chave: Crassostrea gigas; PCR; Oyster; OsHV 1; Detection; Herpes virus 1.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/acte-3653.pdf

Essais préliminaires de pêche des anchois à la lumière dans le golfe de Gascogne (9 au 16 mai 1965)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kurc, Georges.
Les anchois abondent dans la majeure partie du golfe de Gascogne, mais c'est surtout au sud, entre la côte des Landes et la côte cantabrique, que se forment au printemps les plus importantes concentrations de grands anchois adultes. Ils sont l'objet d'une pêche intensive de la part des flottilles espagnoles de Fontarabie à Santander.  En France, les pêcheurs de Saint-Jean-de-Luz sont les seuls qui recherchent cette espèce, généralement pendant les mois d'avril et de mai, c'est-à-dire après la fin de la campagne sardinière d'hiver et jusqu'à l'apparition des premiers thons rouges.  Au cours des dernières années, l'anchois pêché par les luziens était mis en conserve à l'huile, après emboîtage à cru. Ce produit, de qualité satisfaisante, n'a pourtant pas...
Tipo: Text
Ano: 1965
URL: http://archimer.ifremer.fr/doc/1965/publication-7245.pdf

Statistiques ISTPM des régions de pêches - année 1961
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Tipo: Text
Ano: 1962
URL: http://archimer.ifremer.fr/doc/1962/publication-4250.pdf

Processus et enregistrements sédimentaires dans les canyons sous-marins Bourcart et de Capbreton durant le dernier cycle climatique.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gaudin, Mathieu.
Submarine canyons cutting continental shelves and slopes are considered to be erosive features allowing continental derived sediment to reach the deep sea. In order to better understand their sedimentary dynamic and morphologic evolution through time, two submarine canyons, the Bourcart canyon in the Gulf of Lion and the Capbreton canyon in the Bay of Biscay have been studied. The Bourcart canyon, located at the shelf break at 110 m water depth, is disconnected from direct sediment supply during sea-level highstand and is considered as inactive. The Capbreton canyon's head is located 400 m off the coastline, and is disconnected from the Adour river since the 16th century. Bathymetric, core, radioisotopic and current data showed that these canyons are...
Tipo: Text
Palavras-chave: Seal level variations; Last climatic cycle; Gravity currents; Dense water cascading; Coarse grained sedimentation; Gulf of Lion; Bay of Biscay; Submarine canyon; Variations du niveau marin; Dernier cycle climatique; Courants gravitaires; Plongées d'eau dense; Sédimentation sableuse; Golfe du Lion; Golfe de Gascogne; Canyon sous marin.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/these-2511.pdf

Quartier maritime Bordeaux. 2019. Activité des navires de pêche.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d’Informations Halieutiques » (SIH) de l’Ifremer, qui constitue le réseau d’observation des ressources halieutiques et des usages associés. Ce projet s’inscrit dans la mission de service d’intérêt public de l’Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l’analyse du secteur des pêches, le SIH a en charge l’élaboration d’indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche et du grand public.
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00650/76194/77157.pdf

Caractérisation génétique de l’effort reproducteur de l’huître creuse, Crassostrea gigas, dans le cadre des mortalités estivales de juvéniles : Approch QTL
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Flahauw, Emilie.
The Pacific oyster, Crassostrea gigas, is a major aquacultured species whose production represents an economic interest at worldwide, european and french levels. However, this species undergoes summer mortalities recorded from the beginning of the 20th century and, since 2008, this phenomenon increased and threatens mainly juvenile oysters. Aquaculture production of oysters suffers consequences of mass mortalities, that’s why this phenomenon has been studied for many years. In France, the bacterium Vibrio splendidus and the Ostreid virus Herpes Virus 1 (OsHV-1) are often associated with mass mortality outbreaks of juveniles oysters and it was demonstrated that selected individuals for resistance to summer mortality were able to slow the increasing in viral...
Tipo: Text
Palavras-chave: Huître creuse du Pacifique; Crassostrea gigas; Mortalités estivales; Survie; Effort reproducteur; Imagerie par Résonance Magnétique; Histologie; Marqueurs microsatellites; Marqueurs SNP; Cartographie de liaison; Détection de QTL; Pacific oyster; Crassostrea gigas; Summer mortality; Survival; Reproductive effort; Magnetif Resonance Imaging; Histology; Microsatellites; SNPs; Linkage mapping; QTL detection.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00233/34377/33786.pdf

Mammifères marins. Sous-région marine Golfe de Gascogne. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Martinez, Ludivine; Dabin, Willy; Caurant, Florence; Van Canneyt, Olivier; Doremus, Ghislain; Peltier, Hélène; Spitz, Jérôme; Vincent, Cécile; Ridoux, Vincent; Kiszka, Jeremy.
Tipo: Text
Palavras-chave: Golfe de Gascogne; Mammifères marins; Conservation; Caractéristiques démographiques; Suivi; Espèces; Rôle dans les écosystèmes.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00329/44030/43602.pdf

Impact of relative sea level and rapid climate changes on the architecture and lithofacies of the Holocene Rhone subaqueous delta (Western Mediterranean Sea)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fanget, Anne-sophie; Berne, Serge; Jouet, Gwenael; Bassetti, Maria-angela; Dennielou, Bernard; Maillet, Gregoire M.; Tondut, Mathieu.
The modern Rhone delta in the Gulf of Lions (NW Mediterranean) is a typical wave-dominated delta that developed after the stabilization of relative sea level following the last deglacial sea-level rise. Similar to most other deltas worldwide, it displays several stacked parasequences and lobes that reflect the complex interaction between accommodation, sediment supply and autogenic processes on the architecture of a wave-dominated delta. The interpretation of a large set of newly acquired very high-resolution seismic and sedimentological data, well constrained by 14C dates, provides a refined three-dimensional image of the detailed architecture (seismic bounding surfaces, sedimentary facies) of the Rhone subaqueous delta, and allows us to propose a...
Tipo: Text
Palavras-chave: Delta; Holocene; Maximum Flooding Surface; Sea level; Tempestites; Western Mediterranean.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00179/29017/27445.pdf

Patterns of trace metal bioaccumulation and trophic transfer in a phytoplankton-zooplankton-small pelagic fish marine food web
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chouvelon, Tiphaine; Strady, Emilie; Harmelin-vivien, Mireille; Radakovitch, Olivier; Brach-papa, Christophe; Crochet, Sylvette; Knoery, Joel; Rozuel, Emmanuelle; Thomas, Bastien; Tronczynski, Jacek; Chiffoleau, Jean-francois.
Trace metal contamination in the European sardine and anchovy food web was investigated in the Gulf of Lions, NW Mediterranean Sea, including seawater and size fractions of plankton. The results highlighted: i) higher and more variable concentrations in the smaller plankton size classes for all metals except cadmium; ii) higher concentrations in anchovy versus sardine for all elements except lead; iii) different patterns of metal bioaccumulation through the food web: cobalt, nickel, copper, silver, lead and zinc displayed continuously decreasing concentrations (with the exception of increased zinc in fish only), while mercury concentrations dropped considerably in larger plankton size classes and rose significantly in fish. Lastly, cadmium concentrations...
Tipo: Text
Palavras-chave: Inorganic elements; Seawater; Size-classed plankton; Sardina pilchardus; Engraulis encrasicolus; Mediterranean Sea.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00511/62286/67906.pdf

Le Fier d'Ars : Approche de la variabilité des peuplements floristiques et de l'hydrologie d'une zone humide littorale anthropisée
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Weiss, Isabelle.
Le Fier d'Ars représente une zone humide vaste de 800 Ha, au nord de l'Ile de Ré. Sur cette baie semi-fermée se côtoient de nombreuses activités anthropiques comme la saliculture, l'ostréiculture, la pisciculture et le tourisme. L'existence de ces secteurs économiques implique une gestion fine de cet écosystème littoral atlantique, où la conservation d'espèces floristiques et faunistiques d'intérêt communautaire prend une importance croissante. D'autre part, l'usage de l'eau et sa gestion sont un point-clé du développement de ces zones humides. Cette étude consiste d'une part, à caractériser et à suivre l'évolution au niveau hydrologique de deux points de prélèvement situés sur le Fier d'Ars et, d'autre part, à évaluer la couverture végétale de cette zone...
Tipo: Text
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00439/55014/56443.pdf

Une procédure systématique pour le sous-échantillonnage des prélèvements de plancton
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Koutsikopoulos, Constantin; Petitgas, Pierre.
It is often necessary to sub-sample plankton samples even if the precision of the estimation is thereby decreased. A methodological optimization is looked for. The variance depends on the procedure of construction of the aliquot (strategy) and the number of individuals counted (effort). The sub-sampling effort is allocated in a general context of repartition of the total effort between sampling and sub-sampling. This effort depends on the time consumed by the sub-sampling procedure, the volume of the aliquot and the number of individuals counted. For the same effort, a systematic procedure for the construction of sub-samples is more precise than a random one because it travels through the entire sample and is thus less dependent on the spatial distribution...
Tipo: Text
Palavras-chave: Plancton; Sous-échantillonnage; Effort; Précision; Plankton; Sub-sampling; Effort; Precision.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00131/24259/22252.pdf

WP2 : Développer la nouvelle génération des flotteurs Argo
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Reste, Serge; Andre, Xavier; Dutreuil, Vincent; Leymarie, Edouard.
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00317/42856/42271.pdf

Factors affecting the immigration of postlarval penaeid shrimp into a Mexican lagoon system
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mair, J M; Watkins, J L; Williamson, Di.
Penaeus californiensis , P. brevirostris , P. vannamei and P. stylirostris occur in western Mexico, and all breed in the sea. P. californiensis is the dominant species in commercial catches from the sea and P. vannamei from coastal lagoons. Observations are summarized on the laboratory behavior of postlarvae of these species and on their distribution in relation to environmental factors in the channel (estuary) linking Huizache Lagoon to the sea. This estero (estuary) which is about 10 km long, has a lower salinity than the sea only from July to November. The net tidal flow in the estuary is lagoonward from February to July and seaward from August to January. In the laboratory, postlarvae of all species preferred lower salinity than the one to which they...
Tipo: Text
Ano: 1982
URL: http://archimer.ifremer.fr/doc/00246/35725/34233.pdf

Maritime Accounts in the European Union: Coping with Limited Information
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kalaydjian, Regis.
The European Commission's effort to define the scope and components of the maritime economy was initially motivated by the "Integrated Maritime Policy" (2007). This policy package, principally based on coastal environment protection, maritime safety and security, and the European marine observation and data network, also included the development of an EU-wide economic and social database on maritime activities. The IMP database (2009) used experience from EU member states in terms of maritime database development, and conversely was an opportunity to update national contributions.  Later, two other packages contributed to broadening EC's approach. 1) The "Marine Strategy Framework Directive" (2008) was a legislation on marine environment protection. Among...
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00324/43478/42906.pdf

Voyages en Scandinavie, en Laponie, au Spitzberg et aux Feröe, pendant les années 1838, 1839, 1840 sur la corvette la Recherche. Vol. 1, part. 1
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lottin, V.; Bravais, A.; Lilliehöök, C.b.
Dans la liste générale des observations et expériences qui nous étaient demandées, et qui composaient le programme de notre expédition vers le nord de l'Europe, celles relatives au magnétisme terrestre devaient naturellement occuper une large place. Conformément à ce but, nous avions été amplement pourvus, par les ordres de M. le ministre de la marine, de tous les moyens d'investigation que possédaient les physiciens à l'époque de notre départ de France pour le Nord.
Tipo: Text
Palavras-chave: Histoire; Campagne; Laponie; Spitzberg; Féröe; Scandinavie; Magnétisme.
Ano: 1842
URL: http://archimer.ifremer.fr/doc/00002/11348/7917.pdf

Durabilité des composites pour énergie marine renouvelable
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Davies, Peter; Boisseau, A.; Choqueuse, Dominique; Thiebaud, F.; Perreux, D.
Composites will play an essential role in the development of ocean energy conversion systems, and their long term durability is critical to the success of these structures. Composites have been widely used in marine applications and in structures highly loaded in fatigue such as wind turbine blades. However, very few data are available to evaluate their performance under conditions which combine long term immersion in sea water and sustained cyclic loading. In this study composites reinforced with three different types of glass fibre and the same epoxy resin have been tested under these conditions, and the influence of aging on both static and fatigue behaviour has been quantified. Fibre type, resin and fibre/resin interface all influence the fatigue...
Tipo: Text
Palavras-chave: Fatigue; Eau de mer; Énergie marine; Hydrolienne; Pale; Fatigue; Sea water; Ocean energy; Tidal turbine; Blade.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00480/59161/61790.pdf

Generation and analysis of a 29,745 unique Expressed Sequence Tags from the Pacific oyster (Crassostrea gigas) assembled into a publicly accessible database: the GigasDatabase
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fleury, Elodie; Huvet, Arnaud; Lelong, Christophe; De Lorgeril, Julien; Boulo, Viviane; Gueguen, Yannick; Bachere, Evelyne; Tanguy, Arnaud; Moraga, Dario; Fabioux, Caroline; Lindeque, Penelope; Shaw, Jenny; Reinhardt, Richard; Prunet, Patrick; Davey, Grace; Lapegue, Sylvie; Sauvage, Christopher; Corporeau, Charlotte; Moal, Jeanne; Gavory, Frederick; Wincker, Patrick; Moreews, Francois; Klopp, Christophe; Mathieu, Michel; Boudry, Pierre; Favrel, Pascal.
Background: Although bivalves are among the most-studied marine organisms because of their ecological role and economic importance, very little information is available on the genome sequences of oyster species. This report documents three large-scale cDNA sequencing projects for the Pacific oyster Crassostrea gigas initiated to provide a large number of expressed sequence tags that were subsequently compiled in a publicly accessible database. This resource allowed for the identification of a large number of transcripts and provides valuable information for ongoing investigations of tissue-specific and stimulus-dependant gene expression patterns. These data are crucial for constructing comprehensive DNA microarrays, identifying single nucleotide...
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6770.pdf

Etude de la composition en lipides du foie, du muscle et de l'intestin chez le loup (Dicentrarchus labrax L., anciennement Morone labrax L.)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
La composition des graisses de poisson a donné lieu à de nombreuses études. Divers auteurs notent, pour une même espèce, certaines variations dues: d'une part aux fluctuations du milieu de vie, d'autre part à certains paramètres individuels tels que la taille, l'âge, l'origine des animaux. D'autres chercheurs se sont intéressés à 1 influence de la saison de prélèvement ou à l'action du mode de conservation (BLIGH et SCOTT, 1966). Pendant l'exercice 1977, nous nous sommes proposés de faire une analyse quantitative et qualitative des lipides du foie, du muscle et de l'intestin chez le Loup (Dicentrarchus labrax L.) provenant de l"élevage de la DEVA(CNEXO ceci dans la perspective d'une comparaison avec le Loup sauvage dont nous avons commencé l'étude en 1976....
Tipo: Text
Ano: 1978
URL: http://archimer.ifremer.fr/doc/00152/26370/24461.pdf

Lessons learned from the monitoring of turbidity currents and guidance for future platform designs
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Clare, Michael; Lintern, D. Gwyn; Rosenberger, Kurt; Hughes Clarke, John E.; Paull, Charles; Gwiazda, Roberto; Cartigny, Matthieu J. B.; Talling, Peter J.; Perara, Daniel; Xu, Jingping; Parsons, Daniel; Silva Jacinto, Ricardo; Apprioual, Ronan.
Turbidity currents transport globally significant volumes of sediment and organic carbon into the deep-sea and pose a hazard to critical infrastructure. Despite advances in technology, their powerful nature often damages expensive instruments placed in their path. These challenges mean that turbidity currents have only been measured in a few locations worldwide, in relatively shallow water depths (,,2 km). Here, we share lessons from recent field deployments about how to design the platforms on which instruments are deployed. First, we show how monitoring platforms have been affected by turbidity currents including instability, displacement, tumbling and damage. Second, we relate these issues to specifics of the platform design, such as exposure of large...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00640/75200/75333.pdf

Hydrogen peroxide in the marine boundary layer over the South Atlantic during the OOMPH cruise in March 2007
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fischer, H.; Pozzer, A.; Schmitt, T.; Joeckel, P.; Klippel, T.; Taraborrelli, D.; Lelieveld, J.
In the OOMPH (Ocean Organics Modifying Particles in both Hemispheres) project a ship measurement cruise took place in the late austral summer from 01 to 23 March 2007. The French research vessel Marion Dufresne sailed from Punta Arenas, Chile (70.85A degrees W, 53.12A degrees S), to R,union island (55.36A degrees E, 21.06A degrees S) across the South Atlantic Ocean. In situ measurements of hydrogen peroxide, methylhydroperoxide and ozone were performed and are compared to simulations with the atmospheric chemistry global circulation model EMAC (ECHAM/MESSy Atmospheric Chemistry). The model generally reproduces the measured trace gas levels, but it underestimates hydrogen peroxide mixing ratios at high wind speeds, indicating too-strong dry deposition to...
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00289/40026/39252.pdf

Impact du traitement de bois (CCA) sur l'écophysiologie de la moule M. edulis
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Goulletquer, Philippe.
In European waters, crustaceans and molluscs cause substantial economic damage on wooden structures. Chemical preservatives, such as chromated copper arsenate (CCA) have been developed to protect wood from rotting and are commonly used in many countries.
Tipo: Text
Palavras-chave: Moules; Mytilus edulis; Ecophysiologie; Chrome Cuivre Arsenic°; CCA; Traitements chimiques.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/1997/acte-3253.pdf

Suivi stationnel (2006-2017) des herbiers de zostères (Zostera noltei et Zostera marina) et calcul de l’indicateur « Angiospermes » (2017) dans la masse d'eau côtière FRFC06. Arcachon amont - Bassin Hydrographique Adour-Garonne
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Auby, Isabelle; Oger-jeanneret, Helene; Rigouin, Loic; Trut, Gilles; Cognat, Mathis; Ganthy, Florian; Gouriou, Laure; Bujan, Stéphane; Gouillieux, Benoit; Dalloyau, Sébastien; Feigne, Claude; Pere, Caroline; Aubert, Fabien.
Ce rapport rend compte des résultats obtenus dans les herbiers de la masse d’eau « Arcachon amont » sur l’ensemble de la période d’étude et indique le classement de la masse d’eau « Arcachon amont » vis à vis de l’indicateur de qualité biologique « angiospermes » en 2017.
Tipo: Text
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00451/56239/57798.pdf

Geochemistry of the mantle beneath the Rodriguez Triple Junction and the South-East Indian Ridge
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Michard, A; Montigny, R; Schlich, R.
Rare earth element abundances and Sr, Nd, Pb isotope compositions have been measured on zero-age dredge sample from the Rodriguez Triple Junction (RTJ) and the South-East Indian Ridge (SEIR). Along the SEIR, the geochemical "halo" of the St. Paul hot spot has a half-width of plus or minus 400 km and the data may be fairly well accounted for by a binary mixing between an Indian MORB-type component ( super(87)Sr/ super(86)Sr = 0.7028, super(143)Nd/ super(144)Nd = 0.51304, super(206)Pb/ super(204)Pb = 17.8) and the plume-type St. Paul component (0.7036, 0.5129, and 18.7 respectively). The RTJ has distinctive geochemical properties which contrast with those of the adjacent ridge segments. Low super(206)Pb/ super(204)Pb ratios which plot to the left of the...
Tipo: Text
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00268/37944/36025.pdf

Subcommittee on Economic and Social Sciences (SCESS) - 15th Session. Report
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: GFCM - SCESS (General Fisheries Commission for the Mediterranean- Subcommittee on Economic and Social Sciences).
The fifteenth session of the Subcommittee on Economic and Social Sciences (SCESS) of the GFCM Scientific Advisory Committee (SAC) addressed the following topics: i) socioeconomic assessments in selected case studies; ii) estimation and submission of selected variables under Task V (socioeconomics) of the Data Collection Reference Framework (DCRF); iii) developments on small-scale fisheries; and iv) activities undertaken in working towards a common methodology for socioeconomic analysis. The SCESS agreed on the need to regularly assess socioeconomic indicators at the regional level and the importance of devising a mechanism for reporting the results obtained from bioeconomic models to the SAC. The Subcommittee elaborated on the definition of key...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00274/38557/37078.pdf

Bactéries lactiques et applications alimentaires. Partie 2 : les produits de la mer
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Leroi, Francoise.
La composition de la microflore des produits marins dépend d'importants facteurs tel que : - la flore initiale de la matière première, qui elle-même dépend des conditions environnementales - la flore de recontamination pendant les différentes étapes du procédé de transformation - les facteurs environnementaux liés à la matrice et qui vont permettre la croissance bactérienne (pH, température, sel, potentiel redox, interactions microbiennes etc…).
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00002/11340/7889.pdf

La pêche, une activité ancestrale en mutation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gros, Philippe.
Fisheries and aquaculture provide at least 15% of their animal protein diet to 4.3 billion persons. The rise of aquaculture dates back to the end of the 1980s, when fisheries’ production rate was beginning to decline, sounding the end of its post World War II growth phase. The volume of official landings culminated 25 years ago, without outlook for any further increase. About 60% of fish stocks are currently exploited at the maximum sustainable yield (MSY) level, most of the other ones being overexploited because of the chronic overcapacity of the fleets and of poorly regulated access to fishing. The ecosystem approach to fisheries (EAF) emerged as paradigm shift in the 1990s, underpinning the renewal of management objectives and governance along with...
Tipo: Text
Palavras-chave: Common fishery policy; Ecological footprint; Ecosystem approach to fisheries; Fisheries; Global change; Good ecological status.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00183/29414/27775.pdf

Wind ringing of the ocean in presence of mesoscale eddies
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Klein, Patrice; Lapeyre, Guillaume; Large, Wg.
Recent findings have highlighted the impact of high frequency (HF) winds on the inertial motions and the consequences on the large-scale oceanic circulation [Wunsch and Ferrari, 2004]. Within this context the present study focuses on the role of intermediate scales related to oceanic mesoscale eddies. Results show that a turbulent eddy field does not affect the impact of HF winds on the inertial motions. However the eddies efficiently and permanently concentrate the wind-forced inertial motions in small-scale anticyclonic structures. This leads to a spatially heterogeneous vertical mixing strongly related to the eddy field properties.
Tipo: Text
Ano: 2004
URL: https://archimer.ifremer.fr/doc/00000/10838/9262.pdf

Smart Sensor interface for sea bottom observatories
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Del Rio, Joaquin; Auffret, Yves; Mihai Toma, Daniel; Shariat, Shahram; Andre, Xavier; Barbot, Stephane; Menut, Eric; Lenault, Yannick; Manuel, Antoni; Kassem Zein, Oussama; Champeau, Joel; Kerjean, Dominique.
In order to be able to use all the marine sensors currently available in the market, a new module has to be built to implement the smart sensor standard IEEE-1451 as well as other services used in marine measurements. The smart module is aimed to be used in ALL observatory configurations: autonomous, cabled and buoy-based observatories. This module can also be used for low power data acquisition and control applications in new instrument design such as Ocean Bottom Seismometers (OBS) or any other instrument where data logging, clock synchronization, and plug and play capabilities are important. Therefore, the power consumption of the smart module has to be minimized for batteries based observatories and autonomous instruments.
Tipo: Text
Palavras-chave: Smart Sensor; Instrument Interoperability; IEEE1451; IEEE1588; OBS (Ocean Bottom Seismometer); Clock synchronization; Time stamping services.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00219/32999/31456.pdf

Etat actuel de l'élevage de Penaeus japonicus, en écloserie
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer, MEREA, Equipe méditerranéenne de recherche aquacole.
Penaeus japonicus reproduction bas been studied since many years. Mediterranean and atlantic climatics conditions, in France, allow the rearing of this species. It's easy to obtain post-larvae in an hatchery. Pathologies problems (black gilldease) in relation with the stabulation of breeders are resolved. Survival rate (60%) is good after nine months. Maturation is obtain at 18°e. Thermal stress up at 25°e leeds to spawning. Larval rearing is performed at 26°C, using monospecific algae produced in an algae room , and with Artemia nauplii from the zoe 3 stage. Final density is about 100 P3 per liter. Pregrowing is operated at 23°C. Food compouding is living Artemia nauplii and froozed food. Initial density is 10 P3 per liter and survival rate is 70% P.23....
Tipo: Text
Ano: 1987
URL: http://archimer.ifremer.fr/doc/00271/38241/36424.pdf

Suivi estival des lagunes méditerranéennes françaises - Bilan des résultats 2014
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Derolez, Valerie; Oheix, Jocelyne; Ouisse, Vincent; Munaron, Dominique; Fiandrino, Annie; Messiaen, Gregory; Hubert, Clarisse; Lamoureux, Alice; Malet, Nathalie; Fortune, Martine; Berard, Lucas; Mortreux, Serge; Guillou, Jean-louis.
Le Réseau de Suivi Lagunaire (RSL), qui permettait d’évaluer l’état vis-à-vis de l’eutrophisation des lagunes du Languedoc-Roussillon, a pris fin en 2013. Une campagne DCE d’évaluation de l’état des masses d’eau côtières et de transition de la façade méditerranéenne est programmée en 2015. Ce rapport rend compte des suivis réalisés par Ifremer en 2014 sur 22 masses d’eau lagunaires du bassin Rhône-Méditerranée et Corse (financement AERMC).   Un diagnostic de l’état des masses d’eau, intégrant l’état physico-chimique de la colonne d’eau et l’état du phytoplancton est établi pour les 22 masses d’eau (dont 4 oligo-mésohalines), à partir des données acquises sur la période 2009-2014, selon les critères et les grilles DCE. Trois masses d’eau (Thau,...
Tipo: Text
Palavras-chave: Directive Cadre sur l’Eau (DCE); Lagunes; Masses d’eau de transition; Phytoplancton; Macrophytes; Sédiments.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00273/38461/36864.pdf

Synthetic rope responses in the context of load history: Operational performance
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Weller, S.d.; Davies, Peter; Vickers, A. W.; Johanning, L.
The utilisation of synthetic mooring ropes for marine renewable energy (MRE) devices is a recent occurrence. Despite current use in the offshore industry, MRE mooring components are typically subjected to highly dynamic loads, necessitating the detailed characterisation of operational and long-term component performance for lifecycle analysis and operations management. To address the uncertainties associated with synthetic mooring components in this application, tension experiments have been conducted on nylon 6 parallel-stranded rope samples at IFREMER, France and the University of Exeter, UK under the consortium MERiFIC (Marine Energy in Far Peripheral and Island Communities). Measurements are reported from harmonic loading tests with different initial...
Tipo: Text
Palavras-chave: Synthetic mooring line; Nylon 6; Parallel-strand rope; Load history; Operational performance.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00186/29677/35798.pdf

Effets de l'apport de phytoplancton (Skeletonema costatum) sur la croissance et les variations de la composition biochimique de la palourde japonaise Ruditapes philippinarum cultivée en marais
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Baud, Jean-pierre; Haure, Joel; Garnier, Jacqueline.
A bulk production of phytoplankton (Skelelonema costatum) has been obtained in concrete tanks from saline groundwater. This was used in various concentrations to feed an intensive cultivation of the Manila clam (Ruditapes philippinarum) in ponds. No difference was observed in growth rates of molluscs, with food concentrations between 31 to 126 µg/l Chl a. However, the growth rates obtained from March to November with a food supplement were 1.5 times higher than those observed in the traditional, extensive cultivation. The biomass doubled and the increase in flesh dry weight was 2.5 times higher. The condition index reached a value of 100 in the intensive cultivation. During growth, the proximate composition analysis revealed that the lipid and carbohydrate...
Tipo: Text
Palavras-chave: Ruditapes philippinarum; Skeletonema costatum; Elevage intensif; Claire; Croissance; Composition biochimique; Ruditapes philippinarum; Skeletonema costatum; Intensive rearing; Pond; Growth; Biochemical changes.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00039/14980/12307.pdf

Compte Rendu d’Activités 2012 de l’Unité de Recherche « Recherches et Développements Technologiques »
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Compere, Chantal; Unité RDT.
Compte Rendu d’Activités 2012 de l’Unité de Recherche « Recherches et Développements Technologiques »
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00171/28240/26493.pdf

Submarine Niger Delta: Structural Framework
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mascle, Jean.
Numerous data obtained during recent marine geophysical surveys have been compiled together in order to present the structural framework of Niger Delta and adjacent areas. Seismic reflection results show that the delta slope is characterized by intense diapiric deformations and that the overall structure of the delta is fairly comparable to the structures of the Gulf Coast province margin or of Angolan margin. Seismics as well as gravity and magnetic measurements indicate the existence in the vicinity of the Niger delta of two oceanic trends apparently related to an early phase of opening of the South Atlantic. Both trends can tentatively be correlated on land with the major structures known in the southern and northern Benue trough. A comparion between...
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1976
URL: http://archimer.ifremer.fr/doc/1976/publication-5171.pdf

Biodragages - Protocole de suivi de l'efficacité et de l'impact potentiel
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Alzieu, Claude; Andral, Bruno; Bassoulet, Philippe; Gourmelon, Michele; Le Quillec, Régis; L'Yavanc, Jacky; Quiniou, Francoise.
Les traitements in situ des sédiments, ou biodragages, consistent à disperser à la surface ou à injecter dans le sédiment des produits pulvérulents sur lesquels sont fixées des bactéries capables de dégrader les matières organiques. Peu de données expérimentales sont disponibles quant à l'efficacité et à l'impact de cette pratique qui, bien qu'utilisée dans certains milieux d'eau douce, n'a pas fait l'objet de réelles applications en milieu marin. L'offre de service de quelques opérateurs et la demande des gestionnaires des ports, ne peuvent être prises en considération, faute d'une connaissance approfondie des avantages et inconvénients de telles techniques. Il nous est donc apparu nécessaire de définir et de proposer, aux Services en charge des...
Tipo: Text
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00040/15121/12457.pdf

Are planktonic larvae of marine benthic invertebrates too scarce to compete within species?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Strathmann, Rr.
Several models for the evolution of complex life histories have assumed a carrying capacity for both larval and postlarval stages. In addition, the densities of larvae in laboratory experiments are often so high that there is competition for food. Published values for maximal clearance rates and estimated abundances of larvae suggest that these assumptions and experimental conditions are unrealistic for most marine larvae. For most ciliated larvae, maximum clearance rates are at most a few mi of water daily, and their estimated larval concentrations are at most one to several larvae per liter. Therefore these larvae appear to be too scarce for their grazing to affect their food supply. Larvae of most species are also scarce relative to co-occurring...
Tipo: Text
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00094/20495/18164.pdf

Charting the seaward limit of posidonia-oceanica meadows and of circalittoral biocoenoses along the coast of monaco
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Falconetti, C; Meinesz, A.
Tipo: Text
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00106/21741/19314.pdf

Working Group on Introductions and Transfers of Marine Organisms (WGITMO)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ICES.
The Working Group on the Introductions and Transfers of Marine Organisms (WGITMO) has contributed several major achievements to the ICES vision, including the first ICES Viewpoint on Biofouling and its source document, two Cooperative Research Reports, and numerous publications related to ToRs, and the continued population of the AquaNIS database. During the three-year cycle (2017–2019), the scientific experts of this working group, representing 21 countries, met and worked collaboratively with PICES, CIESM and other ICES working groups and international organizations. They have focused their scientific understanding of marine ecosystems to provide information (e.g. national reports, contributing to the AquaNIS database, ToR a), knowledge and advice on the...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00513/62475/66799.pdf

Voyage du S.Y. Belgica 1897 - 1899. Volume 3, part 5. Météorologie - Aurores australes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Arctowski, Henryk.
Les aurores australes ne sont encore que très imparfaitement connues, car fort peu d 'observations suivies ont été faites dans l'hémisphère sud. M. W. Boller, qui a dressé le catalogue complet des aurores australes notées de puis 1640 jusqu'à 1895 (c'est-à-dire pour un laps de temps de plus de 250 années), a compté en tout 1582 observations, correspondant à 791 aurores différentes. Sur ce nombre, la plupart n'ont été décrites que d'une façon très insuffisante. Néanmoins, M. Boller a pu déduire de ces observations deux faits d'une importance capitale, à savoir : que la distribution géographique des aurores australes, par rapport au pôle magnétique sud, ressemble à celle des aurores boréales, et que les périodes séculaires sont les mêmes. [OCR NON CONTRÔLE]
Tipo: Text
Ano: 1901
URL: http://archimer.ifremer.fr/doc/1901/publication-7342.pdf

Ultrasound-assisted extraction of R-phycoerythrin from Grateloupia turuturu with and without enzyme addition
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Guillard, Cecile; Dumay, Justine; Donnay-moreno, Claire; Bruzac, Sandrine; Ragon, Jean-yves; Fleurence, Joel; Berge, Jean-pascal.
The aim of this study was to compare two processes for the extraction of R-phycoerythrin (R-PE) from the red seaweed Grateloupia turuturu: ultrasound-assisted extraction (UAE) and ultrasound-assisted enzymatic hydrolysis (UAEH). Process efficiencies were both evaluated by the yield of R-PE extraction and by the level of liquefaction. Experiments were conducted at 40 and 22 °C, for 6 h, using an enzymatic cocktail and an original ultrasonic flow-through reactor. R-PE appeared very sensitive to temperature, thus 22 °C is strongly recommended for its extraction by UAEH or UAE. However, the higher processing temperature (40 °C) clearly increased the extraction of water-soluble compounds (up to 91% of liquefaction).  These two new processes are thus promising...
Tipo: Text
Palavras-chave: Seaweed; Grateloupia turuturu; R-phycoerythrin; Ultrasound-assisted extraction; Ultrasound-assisted enzymatic hydrolysis; Liquefaction.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00292/40332/39993.pdf

Etude d'impact du rejet des eaux d'exaure du tunnel sur l'environnement marin
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Monbet, Yves; Delpech, Jean-paul; Le Hir, Pierre.
En 1983, plus de 20 millions de voyageurs et près de 20 millions de tonnes de marchandises ont traversé la Manche ou la Mer du Nord entre la Grande-Bretagne et le continent. Ces échanges sont trois fois supérieurs à ceux enregistrés en 1970, ce qui représente une augmentation annuelle de l'ordre de 10 %. Les prévisions les plus réalistes tablent actuellement sur une augmentation moyenne légeretnent supérieure à 4 % par an d'ici l'an 2000, ce qui équivaut à plus que doubler à cette date le trafic actuel. Pour répondre à une telle demande, il a été nécessaire d'envisager différentes solutions permettant de faire face à l'augmentation prévue.
Tipo: Text
Ano: 1987
URL: http://archimer.ifremer.fr/doc/00080/19124/16719.pdf

Mercury distribution and transport in the North Atlantic Ocean along the GEOTRACES-GA01 transect
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cossa, Daniel; Heimburger, Lars-eric; Perez, Fiz F; Garcia-ibanez, Maria Isabel; Sonke, Jeroen E.; Planquette, Helene; Lherminier, Pascale; Boutorh, Julia; Cheize, Marie; Barraqueta, Jan Lukas Menzel; Shelley, Rachel; Sarthou, Geraldine.
We report here the results of total mercury (HgT) determinations along the 2014 GEOTRACES GEOVIDE cruise (GA01 transect) in the North Atlantic Ocean (NA) from Lisbon (Portugal) to the Labrador coast (Canada). Ninety-seven percent of the HgT concentrations of unfiltered samples (HgTUNF) ranged between 0.16 and 1.00 pmol L−1. The geometric mean was 0.51 pmol L−1 for the 535 samples analysed. The dissolved fraction (&lt; 0.45 μm) of HgT, determined on 141 samples, averaged 78 % of the HgTUNF for the whole water column. HgTUNF concentrations increased eastwards and with depth from Greenland to Europe and from sub-surface to bottom waters, respectively. The Hg distribution mirrored that of dissolved oxygen concentration, with highest HgTUNF levels associated...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00412/52303/53071.pdf

Approche économique de la pêche bonitière en Polynésie française
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ugolini, Bruno; Robert, Rene; Mauri, Moea.
Tipo: Text
Ano: 1983
URL: http://archimer.ifremer.fr/doc/00091/20202/17864.pdf

Algal growth on two sections of a fringing coral reef subject to different levels of eutrophication in Reunion Island
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Semple, S.
The temporal Variations in macroalgal coverage and biomass of two sectors of a fringing reef complex in Reunion Island, subject to different levels of nutrient enrichment, were compared over eight months. Little difference was detected in the back reef zone, but in the narrow coral strip zone the highly enriched site showed significantly higher coverage, biomass and diversity of macroalgae throughout the whole study period. Differences in the levels of nutrient enrichment of the reef waters of the two sites are implicated as potential reasons for the observed differences. The seasonal Variations of macroalgae on the reef, and aspects of several of the dominant algal species encountered are also discussed.
Tipo: Text
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00093/20468/18140.pdf

Statistique des pêches maritimes - Année 1949
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Tipo: Text
Ano: 1952
URL: http://archimer.ifremer.fr/doc/00163/27384/25613.pdf

CNEXO - Rapport annuel 1971
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Le rapport présenté par le CNEXO sur ses activités au cours de l'année 1971 s'efforce de montrer comment l'action de l'organisme s'est insérée dans un contexte général caractérisé par une accélération sensible des développements industriels en mer. Le plan adopté qui diffère de ceux des rapports précédents (1968-1969-1970), cherche à présenter de façon particulière dans la partie intitulée "Effets d'une politique d'incitation", certains aspects des activités de coordination du CNEXO et des résultats que l'action de l'organisme a permis d'atteindre au cours de l'année 1971. L'année 1971 a en effet été marquée par un certain nombre de succès remportés par l'industrie océanique française, notamment en matière d'équipement de l'exploitation pétrolière, dans la...
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1971
URL: http://archimer.ifremer.fr/doc/1971/rapport-4815.PDF

Using geochronology to reconstruct the evolution of particulate phosphorus inputs during the past century in the Papeete Lagoon (French Polynesia)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Harris, Pierre; Fichez, Renaud; Fernandez, Jean Michel; Golterman, Han; Badie, Christian.
During the past century, the sediment deposition rate has been assessed by measuring excess Pb-210 activity in a sediment core sampled in the harbour area of the Papeete Lagoon (Tahiti, French Polynesia). Dated sediment samples were analysed following a sequential extraction method to quantify five sedimentary phosphorus pools: loosely sorbed or exchangeable phosphorus, ferric iron-bound phosphorus, authigenic calcium carbonate associated phosphorus, detrital apatite and detritic inorganic phosphorus, acid organic phosphorus. Results from sediment dating showed the core to cover the period from 1865 to 1995, with a sharp change around 1957 corresponding to a doubling in sediment deposition rates. From the bottom to the top of the core, concentrations...
Tipo: Text
Palavras-chave: Géochronologie; Phosphore; Sédiment; Lagons coralliens; Geochronology; Phosphorus; Sediment; Coral reef lagoon.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00322/43365/42850.pdf

Deep-Arvor floats (4000m) : first results and future plans
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thierry, Virginie; Mercier, Herle; Maze, Guillaume; Le Reste, Serge; Dutreuil, Vincent; Andre, Xavier; Lenault, Yannick.
The Deep-Arvor float is an Argo float designed to achieve more than 150 profiles at 4000m depth. It is equipped with a SBE41CP CTD. Oxygen measurements are in option (4330 optode). Two 3500 dbar models were deployed in 2012 and 2013. Two 4000 m (4120 db) industrials prototypes were deployed in 2014. We expect to deploy twelve 4000 m floats in 2015 and 2016. Results at sea of the first 4 Deep-Arvor are presented.
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00281/39195/37749.pdf

Population-specific variations of the genetic architecture of sex determination in wild European sea bass Dicentrarchus labrax L.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Faggion, Sara; Vandeputte, Marc; Chatain, Beatrice; Gagnaire, Pierre-alexandre; Allal, Francois.
Polygenic sex determination (PSD) may show variations in terms of genetic and environmental components between populations of fish species exposed/adapted to different environments. The European sea bass (Dicentrarchus labrax) is an interesting model, combining both a PSD system and a genetic subdivision into an Atlantic and a Mediterranean lineage, with genetic substructures within the Mediterranean Sea. Here, we produced experimental progeny crosses (N = 927) from broodstock sampled in four wild populations (North Atlantic, NAT; Western Mediterranean, WEM; North-Eastern Mediterranean, NEM; South-Eastern Mediterranean, SEM). We found less females than males in the progeny, both in the global dataset (32.5%) and within each paternal group (from 25.1% for...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00464/57609/59864.pdf

Distribution verticale de Dinophysis spp au cours d'un cycle de 48 heures dans le port d'Antifer (Normandie)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lassus, Patrick; Maggi, Pierre; Proniewski, F.; Truquet, Philippe; Nizard, G.
Time-related Dinophysis spp vertical profiles have been studyed during a 48 hours cycle in a submerged cylindric tank. A coïncidental Gymnodinium sp. (Scrippsiella trochoidea and Prorocentrum triestinum as companion species) red tide was believed to have strong effect on Dinophysis distribution in the upper layer during the tirst 24 hours cycle of the period of investigation (August 30-31, 1991). Between 24 and 48 hours, the sharp decrease of Dinophysis densities as well as the graduai decline observed in the red tide and in the vertical thermal gradient have resulted in a migration of dominant species : D. sacculus and D. cf. acuminata toward subsuperficiallevels (5 to 7 m.d) with a higher range in cells vertical movements. This behavior is very similar...
Tipo: Text
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00138/24948/23041.pdf

Application de modèles dynamiques bayésiens aux séries temporelles de Dinophysis à Antifer (Normandie, France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Soudant, Dominique.
Le Dinophysis est une microalgue toxique à l’origine d’epidémies diarrhéiques. En dépit de nombreuses études, l’écologie et la biologie de ce genre phytoplanctonique restent mal connues. Afin de déterminer les conditions d’apparition de Dinophysis cf. acuminata sur le site d’Antifer (Normandie, France), des prélèvements d’eau de mer ont été effectués quasi-journellement pendant les périodes estivales des années 1987 à 1993. Les séries temporelles résultantes concernent la concentration de la microalgue et les facteurs chimiques, physiques et météorologiques. L’analyse de ces données à l’aide d’outils sta- tistiques classiques (e.g. régression) s’est avérée difficile (e.g. instabilité temporelle des résultats). Une caractéristique commune de ces méthodes...
Tipo: Text
Palavras-chave: Modélisation; Statistique; Dynamique; Séries temporelles; Bayésien; Dinophysis; Baie de Seine.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00015/12576/9446.pdf

Chalcogenide Glass Optical Waveguides for Infrared Biosensing
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Anne, Marie-laure; Keirsse, Julie; Nazabal, Virginie; Hyodo, Koji; Inoue, Satoru; Boussard-pledel, Catherine; Lhermite, Herve; Charrier, Joel; Yanakata, Kiyoyuki; Loreal, Olivier; Le Person, Jenny; Colas, Florent; Compere, Chantal; Bureau, Bruno.
Due to the remarkable properties of chalcogenide (Chg) glasses, Chg optical waveguides should play a significant role in the development of optical biosensors. This paper describes the fabrication and properties of chalcogenide fibres and planar waveguides. Using optical fibre transparent in the mid-infrared spectral range we have developed a biosensor that can collect information on whole metabolism alterations, rapidly and in situ. Thanks to this sensor it is possible to collect infrared spectra by remote spectroscopy, by simple contact with the sample. In this way, we tried to determine spectral modifications due, on the one hand, to cerebral metabolism alterations caused by a transient focal ischemia in the rat brain and, in the other hand, starvation...
Tipo: Text
Palavras-chave: Planar waveguide; Fibre; Optical sensor; Chalcogenide.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6851.pdf

L'environnement littoral en l'an 2000 : Quels enjeux pour la recherche?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bourgoin, Jean; Alzieu, Claude.
La mission de prospective confiée par Mr PAPON, Président Directeur Général d'IFREMER à Mr Jean BOURGOIN, Président de la Commission Environnement Littoral d'IFREMER et Mr Claude ALZIEU, Chef de département, IFREMER Centre de Nantes, avait pour objectif de : "recenser les grandes questions d'environnement littoral auxquelles la recherche aura à apporter des réponses à l'horizon de l'an 2000" et de dégager "les grandes orientations de recherche à privilégier" en prenant en considération "le développement des connaissances nécessaires à la protection du littoral, l'évaluation des impacts des aménagements, la surveillance de la qualité des écosystèmes littoraux et une appréciation des conséquences à long terme des activités anthropiques sur la qualité des...
Tipo: Text
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00057/16869/14331.pdf

Some considerations for analyzing biodiversity using integrative metagenomics and gene networks
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bittner, Lucie; Halary, Sebastien; Payri, Claude; Cruaud, Corinne; De Reviers, Bruno; Lopez, Philippe; Bapteste, Eric.
Background:  Improving knowledge of biodiversity will benefit conservation biology, enhance bioremediation studies, and could lead to new medical treatments. However there is no standard approach to estimate and to compare the diversity of different environments, or to study its past, and possibly, future evolution. Presentation of the hypothesis:  We argue that there are two conditions for significant progress in the identification and quantification of biodiversity. First, integrative metagenomic studies - aiming at the simultaneous examination (or even better at the integration) of observations about the elements, functions and evolutionary processes captured by the massive sequencing of multiple markers - should be preferred over DNA barcoding projects...
Tipo: Text
Palavras-chave: Microbial diversity; Species concept; Dna barcodes; Ecological perspective; Community; Functional analysis; Rhodophyta; Systematics; Fragments; Taxonomy.
Ano: 2010
URL: https://archimer.ifremer.fr/doc/00202/31321/29733.pdf

A semi-evolutive filter with partially local correction basis for data assimilation in oceanography
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hoteit, I; Pham, Dt; Blum, J.
A new data assimilation scheme derived from the singular evolutive extended Kalman (Seek) filter is introduced. The novel feature of the new filter is its correction basis which is partially local in the sense that it consists of "global" and "local" vectors, the later obtained from a local empirical orthogonal functions (Eof) analysis. Such an analysis was introduced in order to better represent the local variability of the ocean. This not only significantly reduces the implementation cost but may also improve the representativeness of the correction basis of the filter. The performance of this scheme is evaluated through twin experiments conducted in a realistic setting of the OPA model over the tropical Pacific zone. The results are compared against...
Tipo: Text
Palavras-chave: Filtre Seek; Analyse Eof; Facteur oublié; Data assimilation; Seek filter; Eof analysis; Forgetting factor.
Ano: 2003
URL: https://archimer.ifremer.fr/doc/00321/43244/42973.pdf

Etude en bassin des modèles réduits de chalut - 2ème partie
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Libert, Louis; Portier, Marcel.
Cet article fait suite à une première publication (NEDELEC et PORTIER, 1968 ; Science et Pêche n° 172) où, en même temps que des considérations sur la théorie des essais de modèles réduits en bassin et la réalisation pratique des maquettes d'engins de pêche, ces auteurs avaient décrit divers chaluts et leur gréement. Il y était fait état en particulier du chalut de fond 27/47 et du chalut semipélagique 35/42 gréés tous les deux avec des entremises et des bras. On y traitait également du chalut pélagique à 4 faces 17,60 X 15,35 tel qu'il est utilisé par les bateaux de 150 à 200 cv, c'est-à-dire avec un gréement à fourches et des panneaux rectangulaires traînant sur le fond.
Tipo: Text
Ano: 1973
URL: http://archimer.ifremer.fr/doc/1973/publication-7093.pdf

Caractérisation des mécanismes cellulaires de défense des huîtres plates, Ostrea edulis, saines et parasitée par Bonamia ostreae, en cytométrie en flux
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Garcia, Sandrine.
Depuis la fin des années soixante, la conchyliculture française doit faire face à des mortalités importantes d'huîtres plates, Ostrea edulis, causées entre autres, par le protozoaire, Bonamia ostreae, responsable de la bonamiose. Peu de moyens sont disponibles, vis à vis de cette maladie, pour protéger ces animaux élevés en milieu ouvert. Pour combattre la bonamiose et tenter d'apporter des solutions aux conchyliculteurs, l'IFREMER (Institut Français de Recherche pour l'Exploitation de la Mer), a développé un programme de sélection pour obtenir des animaux résistants. Ces derniers sont obtenus en exerçant une pression de sélection par inoculation de parasites purifiés dans la cavité péricardique d'animaux anesthésiés. Ce processus se faisant sans...
Tipo: Text
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00368/47930/47958.pdf

Thermosipho spp. Immune System Differences Affect Variation in Genome Size and Geographical Distributions
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Haverkamp, Thomas H. A.; Geslin, Claire; Lossouarn, Julien; Podosokorskaya, Olga A.; Kublanov, Ilya; Nesbo, Camilla L.
Thermosipho species inhabit thermal environments such as marine hydrothermal vents, petroleum reservoirs, and terrestrial hot springs. A 16S rRNA phylogeny of available Thermosipho spp. sequences suggested habitat specialists adapted to living in hydrothermal vents only, and habitat generalists inhabiting oil reservoirs, hydrothermal vents, and hotsprings. Comparative genomics of 15 Thermosipho genomes separated them into three distinct species with different habitat distributions: The widely distributed T. africanus and the more specialized, T. melanesiensis and T. affectus. Moreover, the species can be differentiated on the basis of genome size (GS), genome content, and immune system composition. For instance, the T. africanus genomes are largest and...
Tipo: Text
Palavras-chave: Extremophiles; Hydrothermal vents; Mobile DNA; Speciation; Thermotogae; Vitamine B-12.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00478/58934/61503.pdf

Etude halieutique de site. PENLY (Seine Maritime). Etude complémentaire de la nourricerie de poissons plats. 1er juin 1983 - 31 mai 1984. Pêche et biologie des espèces
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Peronnet, Isabelle; Tetard, Alain.
Le programme de recherche exécuté dans le cadre de l'étude d'Avant-Projet a permis de mettre en évidence le rôle biologique du secteur compris entre Dieppe et Le Tréport, qui est une nourricerie pour certaines espèces de poissons plats et notamment pour la sole et la limande. Au cours de l'étude de Projet, les observations ont été étendues à un secteur plus vaste que celui devant être touché par la tache thermique. Les prospections ont été menées sur une zone s'étendant de Dieppe à la baie d'Authie et limitée vers le large par la sonde 15 m, soit à 5-6 milles de la côte. ette extension du réseau d'observation, indispensable pour déterminer le rôle du secteur de Penly en tant que zone de nourriceries et mieux apprécier sur un plan quantitatif l'importance...
Tipo: Text
Ano: 1984
URL: https://archimer.ifremer.fr/doc/00431/54293/59531.pdf

Strength of wet agglomerates of spherical particles: effects of friction and size distribution
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vo, Thanh-trung; Mutabaruka, Patrick; Delenne, Jean-yves; Nezamabadi, Saeid; Radjai, Farhang.
We investigate the mechanical behavior of wet granular agglomerates composed of spherical particles by means of molecular dynamics simulations. The capillary cohesion force is modeled as an attraction force at the contact between two particles and expressed as an explicit function of the gap and volume of the liquid bridge. We are interested in the effect of the friction coefficient between primary particles. The agglomerates are subjected to diametrical compression tests. We find that the deformation is ductile involving particle rearrangements. However, a well-defined stress peak is observed and the peak stress is used as a measure of the compressive strength of the agglomerate. The strength increases with friction coefficient but levels off at friction...
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00685/79694/82474.pdf

Résultats des campagnes scientifiques. Albert 1er de Monaco. Fascicule LXVIII. Etude des huiles d'animaux marins provenant des campagnes scientifiques de S.A.S. le Prince Albert I de Monaco (1897-1913)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Marcelet, Henri; Grimaldi, Albert 1er.
The oils produced by marine animals are very different in composition, as showed by the samples we studied. We have been lucky to find in some oils prepared on board yachts belonging to H.M. Prince Albert of Monaco, during his scientific cruises, some products which had never been studied and of very different compositions. Some, as we will see through this study, are liquid fats, whereas others are oils, sometimes consisting (in a large part) of a new hydrocarbon. We had isolated this latter in July 1914, but WWI interrupted our research. However, some notes published in the Oceanographic Institute Bulletin ensure the priority of some results.
Tipo: Text
Ano: 1924
URL: http://archimer.ifremer.fr/doc/1924/publication-4727.pdf

Larval rearing and spat production of green mussel Mytilus viridis linnaeus in french Polynesia
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: AQUACOP.
To develop mussel culture in the South Pacific and especially in French Polynesia, trials for producing spat of Mytilus viridis were conducted at the Centre Océanologique du Pacifique (Cap) of the Centre National pour l'Exploitation des Océans (CNEXO) in Tahiti. Spawning is attained through thermal stimulation. Larval rearing is conducted in 800-liter cylindroconical tanks. Every two days the water is changed and antibiotics are added as a preventive treatment. Monochrysis lutheri and an Isochrysis locally isolated are used as food. Metarmorphosis and settlement are achieved between the 10th and 17th days. A 15 m3 tank supplied with flowing water from a shrimp rearing pond is used for the pre-growth. The marketable spat size (7-8 mm, 40 mg) is reached in...
Tipo: Text
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/acte-4422.pdf

High-density genetic map and identification of QTLs for responses to temperature and salinity stresses in the model brown alga Ectocarpus
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Avia, Komlan; Coelho, Susana M.; Montecinos, Gabriel J.; Cormier, Alexandre; Lerck, Fiona; Mauger, Stephane; Faugeron, Sylvain; Valero, Myriam; Cock, J. Mark; Boudry, Pierre.
Deciphering the genetic architecture of adaptation of brown algae to environmental stresses such as temperature and salinity is of evolutionary as well as of practical interest. The filamentous brown alga Ectocarpus sp. is a model for the brown algae and its genome has been sequenced. As sessile organisms, brown algae need to be capable of resisting the various abiotic stressors that act in the intertidal zone (e.g. osmotic pressure, temperature, salinity, UV radiation) and previous studies have shown that an important proportion of the expressed genes is regulated in response to hyposaline, hypersaline or oxidative stress conditions. Using the double digest RAD sequencing method, we constructed a dense genetic map with 3,588 SNP markers and identified 39...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00377/48779/49186.pdf

Relationships between benthic macrofauna and habitat suitability for juvenile common sole (Solea solea, L.) in the Vilaine estuary (Bay of Biscay, France) nursery ground
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Nicolas, Delphine; Le Loch, Francois; Desaunay, Yves; Hamon, Dominique; Blanchet, Aline; Le Pape, Olivier.
Coastal and estuarine systems are among the most threatened by human activities which damage their ecological function and, in particular, their nursery role for many marine species. In this context, the protection of these vital ecosystems is a critical issue for the management of fisheries resources. To that aim, functional approaches have to be developed that make it possible to assess habitat suitability and quality. The common sole, Solea solea (L.) was selected as an indicator species to identify the features of coastal and estuarine nursery habitats in the Bay of Biscay (France).   Previous studies have shown that young-of-the-year (YOY) sole are strongly dependent upon various abiotic factors, and especially bathymetry, sediment cover and the...
Tipo: Text
Palavras-chave: Vilaine estuary; Functional indicators; Benthic macrofauna; Essential fish habitat; Nursery ground; Solea solea.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2609.pdf

Demande d’avis sur le dossier de déclaration concernant le dragage d’entretien du port de pêche et de l’avant-port de Pornic
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bizzozero, Lucie; Cochennec-laureau, Nathalie.
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00453/56445/81213.pdf

Etude des sources potentielles de contamination microbienne sur le bassin versant d'une zone conchylicole en Sud Vendée
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Felgines, Dorothée.
Les zones littorales connaissent souvent une multiplicité d'usages : la saliculture, la pisciculture, l'agriculture, le tourisme, l' urbanisme et la conchyliculture. Pour cette dernière activité, c'est à la fois les apports d'eau salée et d'eau douce, riche en nutriments qui peuvent constituer des conditions idéales au développement des coquillages. Mais ces zones conchylicoles sont particulièrement sensibles au niveau de la qualité de l'eau. Situées en aval, elles reçoivent directement à marée basse les apports terrigènes contenus dans l'eau douce. Si ces apports peuvent être intéressants pour les conchyliculteurs, car ils sont en partie nécessaires à l' alimentation des coquillages, ils peuvent être également une source de contamination bactérienne...
Tipo: Text
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00423/53409/54285.pdf

Etude des variations saisonnières de différents biomarqueurs, chez la moule Mytilus galloprovincialis. Relation avec certains paramètres physiques, chimiques et physiologiques
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bodin, Nathalie.
The aim of this study was to evaluate the seasonal variations of six biomarkers on Mytilus galloprovincialis, using comparison with physiological index and chemical contamination levels on two sites of  Mediterranean sea. The seasonal variations of acetylcholinesterase (AChE), DNA adducts, benzo(a)pyrene hydroxylase (BPH), heat-shock proteins (HSP), metallothioneins (MT) and multixeniobiotic proteins (MXR) were estimated over a two-year period, on mussels which were sampled in Carteau (original site) and La Fourcade (transplanted organisms). Carteau, an industrial site, presents higher contamination levels (HAP, PCB, heavy metals) than La Fourcade, an urban area. The PAH profiles underline a strong spatio-temporal variability of levels and sources of...
Tipo: Text
Palavras-chave: Biomonitoring; Mytilus galloprovincialis; Biomarqueurs; Variations saisonnières; Biomonitoring; Mytilus galloprovincialis; Biomarkers; Seasonal variations.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00443/55499/57042.pdf

The intermediate Mediterranean water inflow along the northern slope of the Iberian Peninsula
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Diaz Del Rio, G; Gonzalez, N; Marcote, D.
During the SEFOS 95 cruise (25 March to 15 April 1995) (figure I) a number of CTD casts were made in order to study the intermediate Mediterranean water (IMW) off the west and north coasts of the Iberian Peninsula. One long-term mooring, for current measurement at four levels, was deployed at 43 degrees 57' N - 5 degrees 51' Vii from February to May. We establish a picture of the distribution and transformation of the IMW along the coast of the Iberian Peninsula based on the thermohaline characteristics of the water masses and the determination of the percentage content of the IMW by the use of the triangle of vertical mixing of the North Atlantic central water (NACW), IMW and Labrador water (LW) [3]. A generalised temperature/salinity (T/S) curve is...
Tipo: Text
Palavras-chave: Masse d'eau; Eau centrale nord-atlantique; Eau intermédiaire méditerranéenne; Eau du Labrador; Salinité; Water mass; North Atlantic central water; Intermediate Mediterranean water; Labrador water; Salinity.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00326/43676/43195.pdf

Characteristics of fads2 gene expression and putative promoter in European sea bass (Dicentrarchus labrax): Comparison with salmonid species and analysis of CpG methylation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Geay, Florian; Zambonino, Jose-luis; Reinhardt, Richard; Kuhl, Heiner; Santigosa, Ester; Cahu, Chantal; Mazurais, David.
Marine fish species exhibit low capacity to biosynthesise highly unsaturated fatty acid (HUFA) in comparison to strict freshwater and anadromous species. It is admitted that the Delta(6) desaturase (FADS2) is a key enzyme in the HUFA biosynthetic pathway. We investigated by quantitative PCR the relative amounts of FADS2 mRNA in European sea bass (Dicentrarchus labrax) in comparison with a salmonid species, the rainbow trout (Oncorhynchus mykiss L.). The analysis of the expression data was performed regarding the difference of the characteristics of a critical fragment of the fads2 gene promoter between sea bass and Atlantic salmon. The lower level of fads2 gene expression observed in sea bass suggested that fads2 gene putative promoter, which exhibited an...
Tipo: Text
Palavras-chave: FADS2; Sea bass; Gene expression; Promoter; Methylation.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00065/17621/15310.pdf

Carbon dynamics of the deglacial and contemporary ocean inferred from radiocarbon measurements in foraminifera, seawater and atmospheric carbon dioxide
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Colin Metz, Lindsay.
Late Pleistocene atmospheric CO2 concentrations varied by ~90 ppm, rising with Antarctic and global temperatures during deglaciations. These natural variations were smaller and slower than the present CO2 increase, caused by anthropogenic emissions, which is driving the current transition to the warm Anthropocene. Because the ocean is the largest carbon reservoir that exchanges readily with the atmosphere, most explanations of the glacial-interglacial variations and predictions of future CO2 concentrations involve mechanisms that mediate that exchange. A critical region for such exchange is the Southern Ocean (SO), where carbon-rich deep water is upwelled to the surface by westerly winds that may be responsive to past and present warming. In this...
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00494/60596/64082.pdf

HOT 96 News
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gaill, Francoise; Felbeck, Horst; Desbruyeres, Daniel; Lallier, Francois; Toulmond, A.; Alayse, Anne-marie; Briand, Patrick; Brulport, Jean-pierre; Caprais, Jean-claude; Chevaldonne, P.; Coail, Jean-yves; Cosson, R.; Crassous, Philippe; Delachambre, J.; Durif, C.; Echardour, L.; Herve, G.; Hourdez, Stephane; Jollivet, D.; Kerdoncuff, Jacques; Khripounoff, Alexis; Lechaire, J.p.; Pruski, Audrey; Ravaux, Juliette; Sarradin, Pierre-marie; Shillito, Bruce; Toullec, J.y.; Arndt, C.; Fisher, C.; Lutz, Richard; Childress, J.
Tipo: Text
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00179/29003/27431.pdf

Evaluation de la qualité des zones de production conchylicole - Département d'Ille et Vilaine - Edition 2017
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cheve, Julien; Le Noc, Sandrine.
Après un rappel des objectifs, du fonctionnement et de la méthode d’interprétation des résultats du réseau de contrôle microbiologique des zones de production conchylicoles (REMI) et du réseau d’observation de la contamination chimique (ROCCH), ce rapport inclut un bilan national et décrit le programme annuel du département de l’Ille-et-Vilaine (35). Il présente l’ensemble des résultats obtenus, en particulier l’estimation de la qualité microbiologique et chimique des zones de production de coquillages classées.Pour la troisième année consécutive, les résultats du suivi microbiologique sont globalement bons dans le département d’Ille-et-Vilaine. Les alertes sanitaires ont été quasiment absentes, il n’y a eu qu’une alerte préventive qui n’a pas donné de...
Tipo: Text
Palavras-chave: REMI; E. coli; Contamination bactériologique des coquillages; ROCCH; Contaminants chimiques; Milieu marin; Classement sanitaire des zones de production; Département 35.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00388/49909/50481.pdf

Suspended Sediment Dynamics in the Macrotidal Seine Estuary (France) - Part 2: Numerical Modeling of Sediment Fluxes and Budgets Under Typical Hydrological and Meteorological Conditions
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Schulz, Elisabeth; Grasso, Florent; Le Hir, Pierre; Verney, Romaric; Thouvenin, Benedicte.
Understanding the sediment dynamics in an estuary is important for its morphodynamic and ecological assessment as well as, in case of an anthropogenically controlled system, for its maintenance. However, the quantification of sediment fluxes and budgets is extremely difficult from in-situ data and requires thoroughly validated numerical models. In the study presented here, sediment fluxes and budgets in the lower Seine Estuary were quantified and investigated from seasonal to annual time scales with respect to realistic hydro- and meteorological conditions. A realistic three-dimensional process-based hydro- and sediment-dynamic model was used to quantify mud and sand fluxes through characteristic estuarine cross-sections. In addition to a reference...
Tipo: Text
Palavras-chave: Macrotidal estuary; Sediment fluxes; Numerical modelling; Mud/sand; Wind/waves; River discharge.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00416/52772/53640.pdf

Spatial and temporal variability of the dimethylsulfide to chlorophyll ratio in the surface ocean: an assessment based on phytoplankton group dominance determined from space
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Masotti, I.; Belviso, S.; Alvain, S.; Johnson, J. E.; Bates, T. S.; Tortell, P. D.; Kasamatsu, N.; Mongin, M.; Marandino, C. A.; Saltzman, E. S.; Moulin, C.
Dimethylsulfoniopropionate (DMSP) is produced in surface seawater by phytoplankton. Phytoplankton culture experiments have shown that nanoeucaryotes (NANO) display much higher mean DMSP-to-Carbon or DMSP-to-Chlorophyll (Chl) ratios than Prochlorococcus (PRO), Synechococcus (SYN) or diatoms (DIAT). Moreover, the DMSP-lyase activity of algae which cleaves DMSP into dimethylsulfide (DMS) is even more group specific than DMSP itself. Ship-based observations have shown at limited spatial scales, that sea surface DMS-to-Chl ratios (DMS: Chl) are dependent on the composition of phytoplankton groups. Here we use satellite remote sensing of Chl (from SeaWiFS) and of Phytoplankton Group Dominance (PGD from PHYSAT) with ship-based sea surface DMS concentrations (8...
Tipo: Text
Ano: 2010
URL: https://archimer.ifremer.fr/doc/00231/34250/32617.pdf

Chronic dietary exposure to pyrolytic and petrogenic mixtures of PAHs causes physiological disruption in zebrafish—part II: behavior
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vignet, Caroline; Le Menach, Karyn; Lyphout, Laura; Guionnet, Tiphaine; Frere, Laura; Leguay, Didier; Budzinski, Helene; Cousin, Xavier; Begout, Marie-laure.
In the last 10 years, behavior assessment has been developed as an indicator of neurotoxicity and an integrated indicator of physiological disruption. Polycyclic aromatic hydrocarbon (PAH) release into the environment has increased in recent decades resulting in high concentrations of these compounds in the sediment of contaminated areas. We evaluated the behavioral consequences of long-term chronic exposure to PAHs, by exposing zebrafish to diets spiked with three PAH fractions at environmentally relevant concentrations. Fish were exposed to these chemicals from their first meal (5 days postfertilization) until they became reproducing adults (at 6 months old). The fractions used were representative of PAHs of pyrolytic (PY) origin and of two oils...
Tipo: Text
Palavras-chave: Danio rerio; Polycyclic aromatic hydrocarbon; Heavy oil; Light crude oil; Anxiety-like behavior; Photomotor responses; Maze; Novel tank.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00188/29910/28380.pdf

Bacterial Dynamics in a Microphytobenthic Biofilm: a Tidal Mesocosm Approach
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Agogue, Helene; Mallet, Clarisse; Orvain, Francis; De Crignis, Margot; Mornet, Francoise; Dupuy, Christine.
In intertidal mudflats, during low tide exposure, microphytobenthos (MPB) migrate vertically through the surface sediment and form, with the heterotrophic bacteria, a transient biofilm. Inside this biofilm, multiple interactions exist between MPB and bacteria. These micro-organisms secrete a wide range of extracellular polymeric substances (EPS), which are major components of the biofilm matrix. In this study, we used a tidal mesocosm experiment in order to decipher the interactions of the MPB-EPS-bacteria complex within the biofilm. We tried to determine if the EPS could control bacterial activities and/or production and/or richness according to the age of the biofilm and to the immersion/emersion period. The dynamics of biomasses of MPB and prokaryotes,...
Tipo: Text
Palavras-chave: Muddy sediment; Microphytobenthos; Bacteria; Extracellular polymeric substances; Interactions; Mesocosm.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00181/29271/27682.pdf

Approche experimentale de la croissance et de la morphogenese de la larve de rouget mullus surmuletus
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Menu, Bruno.
Dans le cadre restreint d'un mémoire de DEA, nous avons fait un bilan des données acquises au COB depuis 1975 et réalisé une approche expérimentale de l'embryogénèse et du développement larvaire du rouget en élevage.
Tipo: Text
Ano: 1977
URL: http://archimer.ifremer.fr/doc/00137/24871/22960.pdf

Seasonal and plant-part isotopic and biochemical variation in Posidonia oceanica
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cresson, Pierre; Boudouresque, Charles François; Ruitton, Sandrine; Casalot, Laurie; Verlaque, Marc; Harmelin-vivien, Mireille.
Posidonia oceanica is an iconic and highly productive Mediterranean seagrass. As most studies have focused on the fate of its production, temporal and plant part-specific variations of isotopic composition and biochemical content were overlooked. Combined seasonal and plant-part stable isotope composition and biochemical concentrations were measured at the lower depth limit of a P. oceanica meadow (~ 25 meter depth), and explained on the basis of previous knowledge of the specific metabolic functioning of each part. The predominance of compounds with complex chemical structure was reflected by the high concentrations of insoluble carbohydrates, high C/N ratios and high ä13C values. Plant parts clustered in 3 groups with similar isotopic or biochemical...
Tipo: Text
Palavras-chave: Posidomia oceanica; Mediterranean Sea; Stable isotopes; Biochemical composition.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00505/61640/65566.pdf

Evaluation of the potential of three non-woven flax fiber reinforcements: Spunlaced, needlepunched and paper process mats
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Martin, Nicolas; Davies, Peter; Baley, Christophe.
This paper presents results from an experimental study of three types of non-woven preforms (needlepunched, spunlaced and mat manufactured using a paper-making process) intended as composite reinforcement. These are potentially very attractive for transport applications. First, the influence of processing on elementary fiber tensile properties is shown to be limited. Then the preforms are evaluated in polypropylene matrix composites and mechanical properties are determined. The structure of non-woven reinforcements is strongly dependent on the manufacturing route. By varying the fiber content it is shown that the most efficient reinforcement for flax fibers is the mat produced by paper processing. The new spunlaced reinforced composites are shown to have...
Tipo: Text
Palavras-chave: Flax fibers; Non-wovens; Composite materials; Polypropylene.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00307/41798/41241.pdf

Fishing destabilizes the biomass flow in the marine size spectrum
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rochet, Marie-joelle; Benoit, E.
Fishing impacts on marine food webs are predicted by simulations of a size spectrum community model. In this model, predation is determined by predator and prey size and abundance, and drives predator growth and prey mortality. Fishing amplifies temporal oscillations in the biomass flow. Oscillations appear at lower fishing intensity and have wider amplitude when fishing is selective (removes a narrow size range) and/or when large fish are targeted, than when fishing is more balanced (catching a larger size range) or when small fish are targeted. A novel index of size diversity is developed, and is shown to be sensitive to both fishing intensity and selectivity. To avoid unstable food web dynamics with potential harmful consequences for fisheries, limiting...
Tipo: Text
Palavras-chave: Size spectrum; Ecosystem approach to fisheries management; Biodiversity; Fishing selectivity; Community stability.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00053/16462/14025.pdf

Dredged rocks from the armorican and celtic margins
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Auffret, Gérard-andré; Pastouret, Léo; Cassat, G.; De Charpal, O.; Cravatte, J.; Guennoc, P.
This report presents the preliminary results of the study of rocks and sediments obtained by dredging during four cruises of the R/V Jean Charcot and R/V Le Suroît during a cooperative program between CNEXO and CEPM (CH 58 : April 1975 ; SU 01 : December 1975 ; CH 66 : February 1976 ; and CH 67 : March 1976). A bathymetric map of the margins under study, as well as the location of the 27 dredges considered in this report, are presented in Figures 1 and 2, respectively. [NOT CONTROLLED OCR]
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/publication-5255.pdf

A deterministic population dynamics model to study the distribution of a benthic bivalve with planktonic larvae (Paphia rhomboides) in the English Channel (NW Europe)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Savina, Marie; Menesguen, Alain.
This paper describes the development of a modelling framework to study the distribution in the English Channel of a benthic bivalve with planktonic larvae, Paphia rhomboides. Age-structured population dynamics and growth models are linked together to a compartmental transport and NPZ (Nutrients-Phytoplankton-Zooplankton) model. Used in a spin-up mode, i.e. with identical environmental forcing from a year to the next, this deterministic model converges to the same steady state whatever the initial conditions, after 15-30 years of simulation. Important features of the P. rhomboides distribution are reproduced, particularly its high abundance in the GNB (Golfe Normand-Breton) and its almost complete absence in the Western Channel. The results are discussed in...
Tipo: Text
Palavras-chave: Spatial distribution; Meroplanktonic invertebrates; Growth model; Population dynamics model; Paphia rhomboides; English Channel.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-3718.pdf

Contrôle de surveillance 2017. Echantillonnage DCE des Masses d’Eau de Transition du district hydrographique Adour-Garonne pour le paramètre « faune invertébrée benthique »
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Blanchet, Hugues; Gouillieux, Benoît; Bujan, Stéphane; Devaux, Ludovic; Fouet, Marie; Lucia, Magali.
La Directive Cadre sur l’Eau 2000/60/CE établit un cadre pour la politique communautaire dans le domaine de l’eau. Elle a fixé comme objectif général l’atteinte d’un bon état écologique et chimique des masses d’eau souterraines et de surface, ces dernières incluant les eaux côtières et de transition (intégrant notamment les estuaires). Au sein du district Adour-Garonne, qui s’étend des Pertuis charentais à l’estuaire de la Bidassoa (frontière espagnole), cinq masses d’eau de transition (MET) (« Estuaire de la Charente » (FRFT 01), « Estuaire de la Seudre » (FRFT 02), « Gironde centrale » (FRFT 04), « Estuaire Adour aval » (FRFT 07) et « Bidassoa » (FRFT 81) font l’objet d’une surveillance de la faune invertébrée benthique de substrat meuble dans le cadre...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00475/58698/61208.pdf

Development of a targeted metagenomic approach to study a genomic region involved in light harvesting in marine Synechococcus
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Humily, Florian; Farrant, Gregory K.; Marie, Dominique; Partensky, Frederic; Mazard, Sophie; Perennou, Morgan; Labadie, Karine; Aury, Jean-marc; Wincker, Patrick; Segui, Audrey Nicolas; Scanlan, David J.; Garczarek, Laurence.
Synechococcus, one of the most abundant cyanobacteria in marine ecosystems, displays a broad pigment diversity. However, the in situ distribution of pigment types remains largely unknown. In this study, we combined flow cytometry cell sorting, whole-genome amplification, and fosmid library construction to target a genomic region involved in light-harvesting complex (phycobilisome) biosynthesis and regulation. Synechococcus community composition and relative contamination by heterotrophic bacteria were assessed at each step of the pipeline using terminal restriction fragment length polymorphism targeting the petB and 16S rRNA genes, respectively. This approach allowed us to control biases inherent to each method and select reliable WGA products to construct...
Tipo: Text
Palavras-chave: Marine cyanobacteria; Phycobilisomes; Whole-genome amplification; Flow cytometry cell sorting; Fosmid library.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00374/48495/48843.pdf

Diversity and dynamics of rare and of resident bacterial populations in coastal sands
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gobet, Angelique; Boeer, Simone I.; Huse, Susan M.; Van Beusekom, Justus E. E.; Quince, Christopher; Sogin, Mitchell L.; Boetius, Antje; Ramette, Alban.
Coastal sands filter and accumulate organic and inorganic materials from the terrestrial and marine environment, and thus provide a high diversity of microbial niches. Sands of temperate climate zones represent a temporally and spatially highly dynamic marine environment characterized by strong physical mixing and seasonal variation. Yet little is known about the temporal fluctuations of resident and rare members of bacterial communities in this environment. By combining community fingerprinting via pyrosequencing of ribosomal genes with the characterization of multiple environmental parameters, we disentangled the effects of seasonality, environmental heterogeneity, sediment depth and biogeochemical gradients on the fluctuations of bacterial communities...
Tipo: Text
Palavras-chave: 454 pyrosequencing; Coastal seas; Bacterial diversity; Multivariate analysis; Rare biosphere.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00488/59947/63192.pdf

Du golfe du Lion à l'étang de Thau, tribulations d'une huître indigène (rapport)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fauvel, Yves.
Tipo: Text
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/rapport-4085.pdf

Document de conclusion sur le référentiel des ouvrages
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rabevolo, Clemence.
Document de conclusion sur les référentiels des ouvrages : le Service d'Administration des Référentiels a analysé les différentes typologies d'ouvrages (c’est-à-dire des infrastructures artificielles) côtiers existantes en vue d'en adopter une pour le Système d'Information sur le Milieu Marin. Ce document présente les résultats de cette étude.
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00686/79804/82599.pdf

Growth of the Japanese carpet shell : Validation of increment deposition periodicity by chemical marking
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Caill-milly, Nathalie; Bellamy, Elise; D'Amico, Franck; Mahe, Kelig.
Arcachon Bay is the first French field of Manila clam (Ruditapes philippinarum) with an annual production comprised between 500 and 1000 tons in the recent years. In order to improve stock management,an in situ experimentation of chemical marking, using calcein, has been undertaken to validate the periodicity of increment deposition and the optimal conditions of chemical marking in Arcachon Bay. Later on, daily growth rates will be analysed regarding to  environmental parameters to increase our knowledge on this species.Manila clam were collected and divided into groups of 80 animals (including control group) which size distribution spread over a large range. Identified groups were marked by immersion in a calcein solution (CAS 1461-15-0), using different...
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00039/15066/12401.pdf

Rejets d'elevage de poissons en eau de mer: Consequences pour l'huitre Crassostrea gigas.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Coeurdacier, J.-m.; Heral, Maurice; Liange, M.; Moreau, Jean; Prou, Jean; Razet, Daniel; Williot, P.
Reject waters from sea fish-ponds of rearing trout and turbot show increased ammonia and phosphate values. Protid, lipid and glucid contents of the waters remain low, with total values which do not overpass 1.7 mg.l super(1). After showing that the oysters were likely to absorb sewage from fish farming ponds, the authors examine whether, for epidemiologic and rearing methods reason, it is possible for both types of farming to cohabit as for as zoopathology is concerned. The possible accumulation of antibiotic in mollusks and antibioresistance transfer to germs may be pathogenic for man, are also discussed.
Tipo: Text
Palavras-chave: Aeromonas hydrophila Escherichia coli Crassostrea gigas Bivalvia Antibiotics Growth Environmental effects Bacteria Shellfish culture; Pollution effects Fish culture.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/1982/publication-1855.pdf

Atlas des Habitats des Ressources Marines de la Manche Orientale - CHARM II
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Carpentier, Andre; Coppin, Franck; Curet, Lucie; Dauvin, Jean-claude; Delavenne, Juliette; Dewarumez, Jean-marie; Dupuis, Ludovic; Foveau, Aurélie; Garcia, Clément; Gardel, Laure; Harrop, Stuart; Just, Roger; Koubbi, Philippe; Lauria, Valentina; Martin, Corinne; Meaden, Geoff; Morin, Jocelyne; Ota, Yoshi; Rostiaux, Emilie; Smith, Bob; Spilmont, Nicolas; Vaz, Sandrine; Villanueva, Ching-maria; Verin, Yves; Walton, Joanne; Warembourg, Caroline.
Readers of our first CHARM I atlas will know that almost everything contained within the atlas was original work resulting from two years of intensive study of the Dover Strait by a dedicated and inter- disciplinary team working from bases on either side of the Channel. The present atlas has carried on this eminent precedent, though this time covering the whole of the eastern English Channel (figure 1) and widening considerably the thematic scope. We believe that readers of this current atlas will be impressed by both the breadth and depth of the information provided, and that therefore this content should be available for use in both a wide variety of fields and at various levels of interest (researchers, industries, statutory organisations, the wider...
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/rapport-7377.pdf

Very high-resolution mapping of emerging biogenic reefs using airborne optical imagery and neural network: the honeycomb worm (     Sabellaria alveolata     ) case study
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Collin, Antoine; Dubois, Stanislas; Ramambason, Camille; Etienne, Samuel.
Biogenic reefs provide a wide spectrum of ecosystem functions and services, such as biodiversity hotspot, coastal protection, and fishing practices. Honeycomb worm (Sabellaria alveolata) reefs, in the Bay of Mont-Saint-Michel (France), constitute the largest intertidal bioconstruction in Europe but undergo anthropogenic pressures (aquaculture-stemmed food/space competition and siltation, fishing-driven trampling). Very high-resolution (VHR) airborne optical data enable cost-efficient biophysical measurements of reef colonies, strongly expected for conservation approaches. A synergy of remotely sensed airborne optical imagery, calibration/validation photoquadrat ground-truth (202/101, respectively), and artificial neural network (ANN) modelling is first...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00445/55644/57300.pdf

Resurgence risk for malaria, and the characterization of a recent outbreak in an Amazonian border area between French Guiana and Brazil
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mosnier, Emilie; Dusfour, Isabelle; Lacour, Guillaume; Saldanha, Raphael; Guidez, Amandine; Gomes, Margarete S.; Sanna, Alice; Epelboin, Yanouk; Restrepo, Johana; Davy, Damien; Demar, Magalie; Djossou, Félix; Douine, Maylis; Ardillon, Vanessa; Nacher, Mathieu; Musset, Lise; Roux, Emmanuel.
Background In 2017, inhabitants along the border between French Guiana and Brazil were affected by a malaria outbreak primarily due to Plasmodium vivax (Pv). While malaria cases have steadily declined between 2005 and 2016 in this Amazonian region, a resurgence was observed in 2017. Methods Two investigations were performed according to different spatial scales and information details: (1) a local study on the French Guiana border, which enabled a thorough investigation of malaria cases treated at a local village health center and the entomological circumstances in the most affected neighborhood, and (2) a regional and cross-border study, which enabled exploration of the regional spatiotemporal epidemic dynamic. Number and location of malaria cases were...
Tipo: Text
Palavras-chave: Plasmodium vivax; Anopheles darlingi; French Guiana; Brazil; Transnational; Outbreak investigation; Indigenous south Americans; Malaria; Amazonia.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00632/74387/74081.pdf

Microparticulate feeds for Penaeid larvae
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kanazawa, A.
The mass production of penaeid larvae still depends on live foods such as diatoms, Chlorella and Artemia . However, it requires much facilities, maintenance expenses, and labor to produce a desired amount of life foods safely and constantly. Also, the nutritive value of planktonic organisms is occasionally variable and this makes the use of live food for mass culture restrictive. Therefore, it is necessary to develop microparticulate diets as a substitute for live foods to further increase the productivity of seed for shrimp culture.
Tipo: Text
Palavras-chave: Penaeus japonicus; Nutritional requirements; Food organisms; Fish meal; Proteins; Nutritive value; Survival; Food; Diets; Feeding; Feed; Shrimp culture.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1463.pdf

Genetic diversity, paraphyly and incomplete lineage sorting of mtDNA, ITS2 and microsatellite flanking region in closely related Heliopora species (Octocorallia)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Yasuda, Nina; Taquet, Coralie; Nagai, Satoshi; Fortes, Miguel; Fan, Tung-yung; Harii, Saki; Yoshida, Terutoyo; Sito, Yuta; Nadaoka, Kazuo.
Examining genetic diversity and lineage sorting of different genes in closely related species provide useful information for phylogenetic analyses and ultimately for understanding the origins of biodiversity. In this study, we examined inter- and intraspecific genetic variation in internal transcribed spacer 2 (ITS2), partial mitochondrial gene (mtMutS), and nuclear microsatellite flanking region in two closely related octocoral species (Heliopora coerulea, HC-A and HC-B). These species were recently identified in a population genetic study using microsatellite markers. The two species have different reproductive timing, which ecologically promotes lineage sorting. In this study, we examined whether species boundaries could be detected by the commonly used...
Tipo: Text
Palavras-chave: ITS2; Concerted evolution; MtMutS; Secondary structure; Species identification; Speciation.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00667/77932/80144.pdf

Carbonic-calcium system, nutrients and total organic nitrogen in continental runoff to the galician rias baixas, NW Spain
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Perez, Ff; Alvarezsalgado, Xa; Roson, G; Rios, Af.
Biogenic element levels in continental runoff and their behaviour during estuarine mixing are studied in the Galician Rias Baixas for the upwelling season (May-October). Alkalinity, calcium, both with average concentrations of about 350 mumol.kg-1, and reactive silica, with 105 mumol.kg-1, show near conservative distributions along the estuarine side of the rias. A good agreement was found between values obtained by direct measurement in the river and those calculated by extrapolation to zero salinity from the mixing diagrams. On the other hand, nitrate (10-40 mumol.kg-1) and mainly phosphate (1 mumol.kg-1) are strongly affected by the biological activity of benthic algae during estuarine mixing. TON and ammonium in the innermost parts of the Ria de Arousa...
Tipo: Text
Palavras-chave: BIOGENIC ELEMENTS; TON; RUNOFF; ESTUARINE MIXING; RIAS-BAIXAS.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00101/21184/18801.pdf

Parcs et réserves en milieu marin - La Baie de Bourgneuf
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Jegou, Anne-marie; Creze, J.y.
La Baie de BOURGNEUF est située sur le littoral atlantique juste au Sud de l'estuaire de la LOIRE dont elle est séparée par la pointe de ST GILDAS. Cette baie ne serait qu'une simple ondulation du trait de côte si l'Ile de NOIRMOUTIER ne la séparait de l'océan sur une vingtaine de kilomètres. Ainsi ne subsiste-t-il que deux ouvertures, l'une au Nord qui s'étend sur une largeur de 12 kilomètres entre la pointe de l'HERBAUDIERE et celle de ST GILDAS, l'autre au Sud, large de 800 mètres, qui n'est en fait qu'un étroit goulet entre la pointe de la FOSSE et celle de NOTRE DAME DE MONT. Du point de vue milieu naturel - comme ailleurs du point de vue historique et administratif - la baie fait le contact entre le littoral breton (falaises, rias, criques) et les...
Tipo: Text
Ano: 1977
URL: http://archimer.ifremer.fr/doc/00132/24309/22307.pdf

pH controls spermatozoa motility in the Pacific oyster (     Crassostrea gigas     )
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boulais, Myrina; Suquet, Marc; Arsenault-pernet, Marie Eve Julie; Malo, Florent; Queau, Isabelle; Pignet, Patricia; Ratiskol, Dominique; Le Grand, Jacqueline; Huber, Matthias; Cosson, Jacky.
Investigating the roles of chemical factors stimulating and inhibiting sperm motility is required to understand the mechanisms of spermatozoa movement. In this study, we described the composition of the seminal fluid (osmotic pressure, pH, and ions) and investigated the roles of these factors and salinity in initiating spermatozoa movement in the Pacific oyster. The acidic pH of the gonad (5.82 ± 0.22) maintained sperm in the quiescent stage and initiation of flagellar movement was triggered by a sudden increase of spermatozoa external pH (pHe) when released in seawater (SW). At pH 6.4, percentage of motile spermatozoa was three times higher when they were activated in SW containing 30 mM NH4Cl, which alkalinizes internal pH (pHi) of spermatozoa, compared...
Tipo: Text
Palavras-chave: Seminal fluid; Spermatozoa; Motility; PH; Salinity; Ions.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00428/53976/55137.pdf

Regional metier definition: a comparative investigation of statistical methods using a workflow applied to international otter trawl fisheries in the North Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Deporte, Nicolas; Ulrich, Clara; Mahevas, Stephanie; Demaneche, Sebastien; Bastardie, Francois.
The European Common Fisheries Policy recognizes the importance of accounting for heterogeneity in fishing practices, and metier-based sampling is now at the core of the EU Data Collection Framework. The implementation of such an approach would require Member States to agree on the standard regional metier definitions and on practical rules to categorize logbook records into metiers. Several alternative approaches have been used in the past to categorize landings profiles, but no consensus has yet emerged. A generic open-source workflow is developed to test and compare a selection of methods, including principal components analysis (PCA), hierarchical agglomerative clustering (HAC), K-means, and Clustering LARge Applications (CLARA), and to provide simple...
Tipo: Text
Palavras-chave: Cluster; Data Collection Framework (DCF); Logbooks; Mtier; Mixed fisheries; Multivariate analysis; North Sea.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00071/18225/15841.pdf

Tintinnides (Ciliophora, Oligotrichida, Tintinnina) de l'Atlantique boréal, de l'Océan Indien et de quelques mers adjacentes : Méditerranée, Mer Caraibe, Mer Rouge. Inventaire et distribution. Observations basées sur les loricas.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Paulmier, Gerard.
L'inventaire et la distribution des tintinnides, un des principaux groupes du zooplancton, ont pu ètre effectués sur des échantillons de plancton provenant de diverses régions marines : dans l'Atlantique boréal occidental, du Labrador au Banc Georges, dans la Province caraïbe et en Mer des Sargasses, dans l'Atlantique central, de l'ouest des Açores à la côte africaine, dans l'Atlantique oriental, en Manche, dans le Golfe de Gascogne et en Méditerranée, ainsi que dans l'Océan Indien, depuis la Mer Rouge jusqu'à l'est-sud-est des îles Kerguelen, au niveau de la convergence antarctique. Les résultats acquis confirment, globalement, les observations antérieures sur la distribution de ces protozoaires, aussi connus pour leur grande variabilité morphologique...
Tipo: Text
Palavras-chave: Tintinnides; Atlantique; Océan Indien; Inventaire; Distribution; Tintinnids; Atlantic; Indian Ocean; Inventory; Distribution.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00424/53609/54429.pdf

Pelagic community production and carbon-nutrient stoichiometry under variable ocean acidification in an Arctic fjord
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Silyakova, A.; Bellerby, R. G. J.; Schulz, K. G.; Czerny, J.; Tanaka, T.; Nondal, G.; Riebesell, U.; Engel, A.; De Lange, T.; Ludvig, A.
Net community production (NCP) and carbon to nutrient uptake ratios were studied during a large-scale mesocosm experiment on ocean acidification in Kongsfjorden, western Svalbard, during June-July 2010. Nutrient depleted fjord water with natural plankton assemblages, enclosed in nine mesocosms of similar to 50m(3) in volume, was exposed to pCO(2) levels ranging initially from 185 to 1420 mu atm. NCP estimations are the cumulative change in dissolved inorganic carbon concentrations after accounting for gas exchange and total alkalinity variations. Stoichiometric coupling between inorganic carbon and nutrient net uptake is shown as a ratio of NCP to a cumulative change in inorganic nutrients. Phytoplankton growth was stimulated by nutrient addition half way...
Tipo: Text
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00152/26283/24366.pdf

Ocean Climate Observing Requirements in Support of Climate Research and Climate Information
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Stammer, Detlef; Bracco, Annalisa; Achutarao, Krishna; Beal, Lisa; Bindoff, Nathaniel L.; Braconnot, Pascale; Cai, Wenju; Chen, Dake; Collins, Matthew; Danabasoglu, Gokhan; Dewitte, Boris; Farneti, Riccardo; Fox-kemper, Baylor; Fyfe, John; Griffies, Stephen M.; Jayne, Steven R.; Lazar, Alban; Lengaigne, Matthieu; Lin, Xiaopei; Marsland, Simon; Minobe, Shoshiro; Monteiro, Pedro M. S.; Robinson, Walter; Roxy, Mathew Koll; Rykaczewski, Ryan R.; Speich, Sabrina; Smith, Inga J.; Solomon, Amy; Storto, Andrea; Takahashi, Ken; Toniazzo, Thomas; Vialard, Jerome.
Natural variability and change of the Earth's climate have significant global societal impacts. With its large heat and carbon capacity and relatively slow dynamics, the ocean plays an integral role in climate, and provides an important source of predictability at seasonal and longer timescales. In addition, the ocean provides the slowly evolving lower boundary to the atmosphere, driving, and modifying atmospheric weather. Understanding and monitoring ocean climate variability and change, to constrain and initialize models as well as identify model biases for improved climate hindcasting and prediction, requires a scale-sensitive, and long-term observing system. A climate observing system has requirements that significantly differ from, and sometimes are...
Tipo: Text
Palavras-chave: Ocean observing system; Ocean climate; Earth observations; In situ measurements; Satellite observations; Ocean modeling; Climate information.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00675/78724/80996.pdf

Systematics and Molecular Phylogeny of the Family Oscarellidae (Homoscleromorpha) with Description of Two New Oscarella Species
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gazave, Eve; Lavrov, Dennis V.; Cabrol, Jory; Renard, Emmanuelle; Rocher, Caroline; Vacelet, Jean; Adamska, Maja; Borchiellini, Carole; Ereskovsky, Alexander V.
The family Oscarellidae is one of the two families in the class Homoscleromorpha (phylum Porifera) and is characterized by the absence of a skeleton and the presence of a specific mitochondrial gene, tatC. This family currently encompasses sponges in two genera: Oscarella with 17 described species and Pseudocorticium with one described species. Although sponges in this group are relatively well-studied, phylogenetic relationships among members of Oscarellidae and the validity of genus Pseudocorticium remain open questions. Here we present a phylogenetic analysis of Oscarellidae using four markers (18S rDNA, 28S rDNA, atp6, tatC), and argue that it should become a mono-generic family, with Pseudocorticium being synonymized with Oscarella, and with the...
Tipo: Text
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00372/48285/48466.pdf

Nuclear field shift effect in isotope fractionation of thallium
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fujii, Toshiyuki; Moynier, Frederic; Agranier, Arnaud; Ponzevera, Emmanuel; Abe, Minori; Uehara, Akihiro; Yamana, Hajimu.
Environmental transport of Tl is affected by redox reaction between Tl(I) and Tl(III) and ligand exchange reactions of them. In order to deepen the knowledge of Tl chemistry, we investigated fractionation of Tl stable isotopes (Tl-203 and Tl-205) in a chemical exchange system. Tl isotopes were fractionated in a liquid-liquid extraction system, in which aqueous and organic phases are hydrochloric acid solution and dichloroethane including a crown ether, respectively. After purification by ion-exchange chemistry, the isotope ratio of Tl-205/Tl-203 in equilibrated aqueous phase was measured precisely by multiple-collector-inductively-coupled-plasma-mass-spectrometry. A large isotope fractionation &gt; 1 aEuro degrees was found. Electronic structures of...
Tipo: Text
Palavras-chave: Thallium; Isotope fractionation; Redox; Ligand exchange; Nuclear field shift; Ab initio calculation.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00135/24624/22691.pdf

An hybrid approach for the comparison of VAWT and HAWT performances for floating offshore wind turbines
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Matoug, Camil; Augier, Benoit; Paillard, B; Maurice, G; Sicot, C; Barre, S.
This article describes the experimental comparison of the DTU 10MW HAWT with the WindQuest 10MW VAWT scaled models when both fitted on the Nautilus-10 semisubmersible. For the campaign in Ifremer Wind&amp;Wave tank, different rotor representations are tested from inertia only to hybrid testing with propellers and a Software in the Loop. The hybrid testing uses a tabulated approach for thrust computation and is discussed in this article. The different thrust reproduction methods are compared to OpenFAST simulations calibrated during the Lifes50+ project and used as reference points. When quantifying the scale model's fidelity to Open Fast, cross-correlation was increased up to 14% with the use of the SiL. Thanks to the validation of hydrodynamic simulations...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00652/76444/77532.pdf

Effects of extracellular products from the pathogenic Vibrio aestuarianus strain 01/32 on lethality and cellular immune responses of the oyster Crassostrea gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Labreuche, Yannick; Soudant, Philippe; Goncalves, Madeleine; Lambert, Christophe; Nicolas, Jean-louis.
Vibrio aestuarianus strain 01/32 was previously shown to be pathogenic to Crassostrea gigas juveniles. To investigate virulence mechanisms of this pathogen, we studied the toxicity to oysters of its extracellular products (ECPs). ECPs displayed lethality to animals, with a LD50 value of 3.3 mu g/g body weight. To determine the oyster cellular immune responses induced by these ECPs, we further examined in vitro their effects on C. gigas hemocytes, using flow cytometric-based hemocyte assays. Treatment of hemolymph with ECPs caused a significant inhibition of hemocyte phagocytosis and adhesive capabilities. In contrast, the pathway of reactive oxygen species production was enhanced by higher ECP concentrations. Exposure of hemocytes to live bacteria induced...
Tipo: Text
Palavras-chave: Vibrio aestuarianus; ECPs; Crassostrea gigas; ROS production; Adhesion; Phagocytosis; Flow cytometry; Bivalve immunity.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1035.pdf

Investigating the biological and socio-economic impacts of marine protected area network design in Europe
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Metcalfe, Kristian.
Marine ecosystems are under increasing pressure from a diverse range of threats. Many national governments have responded to these threats by establishing marine protected area (MPA) networks. One such approach for designing MPA networks is systematic conservation planning, which is now considered the most effective system for designing protected area networks. However, the main exception to this trend is Europe, where the designation of MPAs is still largely based on expert opinion, despite growing awareness that these existing methods are not the most effective. Therefore, there is a need to demonstrate how systematic conservation planning can be used to inform MPA design in European waters and show how this approach can fit within existing marine...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00136/24694/22744.pdf

Oxygen budget for the north-western Mediterranean deep-convection region
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ulses, Caroline; Estournel, Claude; Fourrier, Marine; Coppola, Laurent; Kessouri, Faycal; Lefèvre, Dominique; Marsaleix, Patrick.
The north-western Mediterranean deep convection plays a crucial role in the general circulation and biogeochemical cycles of the Mediterranean Sea. The DEWEX (DEnse Water EXperiment) project aimed to better understand this role through an intensive observation platform combined with a modelling framework. We developed a 3 dimensional coupled physical and biogeochemical model to estimate the cycling and budget of dissolved oxygen in the entire north-western Mediterranean deep convection area over the period September 2012 to September 2013. After showing that the simulated dissolved oxygen concentrations are in a good agreement with the in situ data collected from research cruises and Argo floats, we analyze the seasonal cycle of the air-sea oxygen...
Tipo: Text
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00642/75453/76270.pdf

Upstream migration and reproductive patterns of a population of allis shad in a small river (L'Aulne, Brittany, France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Acolas, M; Veron, V; Jourdan, H; Begout, Marie-laure; Sabatie, M; Bagliniere, J.l.
The characteristics and activity of adult allis shad [Alosa alosa (L.)] were analysed during the last part of their upstream migration in the L'Aulne, a small river in Brittany, and during reproduction on a unique spawning ground downstream of an insurmountable dam. The age of the spawners ranged front three to seven years, females being larger and older than males. Population-level migration and reproduction were studied by counting the number of migrating fish, by estimating the sex ratio, and by counting the number of nocturnal spawning acts for three consecutive years starting in 2000. The influence of the environment, especially water temperature and discharge, was highlighted: temperature during migration may supplant the influence of water flow,...
Tipo: Text
Palavras-chave: Small river; Reproduction; Biological features; Anadromous migration; Allis shad.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1214.pdf

Standardized CPUE of bluefin tuna (Thunnus thynnus) caught by spanish traps for the period 1981-2004
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ortiz De Urbina, J; Fromentin, Jean-marc; Restrepo, Victor R; Arrizabalaga, Haritz; De La Serna, Jose-miguel.
Catch rates from the Spanish traps in the Atlantic have been traditionally standardized using a GLM approach with a lognormal error assumption. Nevertheless, some concerns have been expressed regarding the current unit of effort used for standardization purposes as well as the model error assumption. This document explores the adequacy of current effort unit and proposes alternative model error assumptions for the standardization of the CPUE index.
Tipo: Text
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00192/30298/28788.pdf

Feeding of Crassostrea gigas at high seston load : modeling requirements
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Barille, Laurent; Prou, Jean.
Ecophysiological experiments conducted in situ in the Bay of Marennes-Oléron during a spring and neap tide cycle in May 1991 , were designed to get a better representation of 2 important components of the energy budget of the Japanese oyster Crassostrea gigas : clearance rate and selection efficiency. The relationships previously established by Raillard et al. ( 1993) are re-evaluated by integrating the effects of high seston loads, typical of tidal effect within estuaries, on the physiological processes. For the clearance rate, the re-evaluated parameterization includes: - a negative effect of turbidity. - a clogging threshold set to 192 mg/l. Selection efficiency parameterizations are modified by incorporating : - a constant inorganic ingestion for...
Tipo: Text
Palavras-chave: Matematical model; Oyster; Crassostrea gigas; Clearance rate; Seclection efficency; Marennes Oleron; Charente Maritime.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00102/21299/18913.pdf

Crepidula fornicata L. dans le bassin de Marennes-Oléron - Rapport préliminaire 1982
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Deslous Paoli, Jean-marc.
Des prélèvements dans le bassin de Marennes-Oléron ont permis de localiser les fortes charges de Crepidula fornicata L. principalement dans le centre du bassin (le long du banc de Charret et dans le courant d'Oléron). En ces deux points la charge fraîche cumulée a été estimée à environ 2 700 tonnes. La structure de population fait apparaître une croissance moyenne de 20, 19, 17 et 12 millimètres respectivement pour les 1ère, 2ème, 3ème et 4ème années avec une variabilité très importante dès la première année. 74,5% des animaux constituent des chaines primaires d'en moyenne six individus fixés sur des coquilles de crépidules mortes. La période de reproduction s'étale vraisemblablement du mois d'avril au mois de septembre et 25% des individus portent des...
Tipo: Text
Palavras-chave: Crepidula fornicata; Population; Croissance; Reproduction; Marennes Oléron.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/00092/20356/18017.pdf

Mesures de turbidité satellitaire des eaux fortement chargées en MES – Utilisation de l’algorithme OC5-HT en Guyane française
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lampert, Luis; Gohin, Francis; Bryere, Philippe.
The study of the monitored parameters for the WFD directive in French Guiana, enabled us to develop a turbidity algorithm for better characterize coastal waters with high suspended matters. The OC5-HT algorithm answer to this request.
Tipo: Text
Palavras-chave: Guyane française; DCE; Turbidité; Télédétection.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00373/48427/48669.pdf

Atelier d'inter-calibration des estimations des petits pélagiques (Anchois et Sardine) en Atlantique. Boulogne sur mer, 14 au 15 mars 2018
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mahe, Kelig; Duhamel, Erwan; Chantre, Celina; Bled Defruit, Geoffrey.
Cet atelier 2018 a été mis en place pour intercalibrer les estimations d'âge des anchois et des sardines en Atlantique entre Erwan Duhamel qui est le lecteur de ces espèces du golfe de Gascogne et Célina Chantre et Geoffrey Bled Defruit du pôle national de Sclérochronologie du laboratoire Ressources Halieutiques de Boulogne sur mer qui vont commencer à estimer l'âge de ces petits pélagiques dans le golfe de Gascogne. L'objectif est d'abord de calibrer les estimations d’âge pour ces 2 espèces de petits pélagiques dans le golfe de Gascogne et de revoir les moyens pour réaliser les images en mer lors de la campagne Pelgas et à terre en laboratoire. Cette intercalibration est basée sur la lecture d’images : 136 otolithes d'anchois et 140 otolithes de sardine...
Tipo: Text
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00434/54544/55913.pdf

Fixation des larves de Crepidula fornicata : modalité de sélection de l'habitat en couche limite benthique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Olivier, Frederic; Retiere, Christian.
L'espèce invasive Crepidula fornicata, mollusque gastéropode prosobranche originaire d'Amérique du Nord introduit en France dans les années 1930 (Le Gall 1980, Blanchard 1995), prolifère depuis quelques décennies sur les côtes de la Manche et plus particulièrement dans les zones conchylicoles. Dans le Golfe Normand-Breton, les stocks d'adultes de crépidules sont estimés à 1,6 millions de tonnes, dont plus de 160000 tonnes au sud des îles Chausey (Blanchard 1995, Noël et al. 1995, Blanchard et Ehrhold 1999). Présente en épais tapis, cette espèce qui induit un envasement des fonds (sédimentation accrue, production de biodépôts) et qui est susceptible d'entrer en compétition pour la ressource trophique avec les espèces élevées (moules, huîtres, palourdes ......
Tipo: Text
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00104/21517/19098.pdf

FishMed: traits, phylogeny, current and projected species distribution of Mediterranean fishes, and environmental data
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Albouy, Camille; Lasram, Frida Ben Rais; Velez, Laure; Guilhaumon, François; Meynard, Christine N.; Boyer, Séverine; Benestan, Laura; Mouquet, Nicolas; Douzery, Emmanuel; Aznar, Roland; Troussellier, Marc; Somot, Samuel; Leprieur, Fabien; Le Loc'H, François; Mouillot, David.
The FishMed database provides traits, phylogeny, current and projected species distribution of Mediterranean fishes, and associated sea surface temperature (SST) from the regional oceanic model NEMOMED8. Data for the current geographical distributions of 635 Mediterranean fish species were compiled from a published expert knowledge atlas of fishes of the northern Atlantic and the Mediterranean (FNAM) edited between 1984 and 1986 and from an updated exotic fish species list. Two future sets of projected species distributions were obtained for the middle and end of the 21st century by using an ensemble forecasting approach for 288 coastal Mediterranean fish species based on SST according to the IPPC/SRES A2 scenario implemented with the Mediterranean...
Tipo: Text
Palavras-chave: Climate change; Coastal fishes; Functional diversity; Mediterranean fish species; Mediterranean Sea; NEMOMED8; Phylogenetic diversity; Species distribution models; Taxonomic diversity.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00371/48216/48341.pdf

Recueil annuel des campagnes océanographiques françaises 1993
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer.
Ce recueil présente un résumé des comptes rendus des campagnes océanographiques françaises réalisées au cours de l'année 1 993. Les navires et les campagnes cités dans ce recueil appartiennent à la recherche civile française. Il peut s'agir toutefois de navires affrétés dans le cadre d'échanges ou de programmes conjoints. Les organismes impliqués dans ces travaux à la mer sont : * I'IFREMER * I'ORSTOM * la DIRCEN/CEA * les TAAF/IFRTP * l'INSU/CNRS  
Tipo: Text
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00432/54366/55696.pdf

A 4D-variational approach applied to an eddy-permitting North Atlantic configuration: Synthetic and real data assimilation of altimeter observations
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ferron, Bruno.
The increasing number of oceanic observations calls for the use of synthetic methods to provide consistent analyses of the oceanic variability that will support a better understanding of the underlying mechanisms. In this study, a 1/3 degrees eddy-permitting model of the North Atlantic (from 20 degrees S to 70 degrees N) is combined with a 4D-variational method to estimate the oceanic state from altimeter observations. This resolution allows a better extraction of the physical content of altimeter data since the model spatial scales are more consistent with the data than coarser assimilation exercises because of a lower error in model representativity. Several strategies for the assimilation window are tested through twin experiments carried out under the...
Tipo: Text
Palavras-chave: Ocean modelling; Data assimilation; Variational method; Meso-scale; Sea surface height; Heat transport; Meridional overturning.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00044/15534/12956.pdf

REPAMO 2017. Bulletins de la surveillance. Janvier à décembre 2017
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Canier, Lydie; Fleury, Elodie; Normand, Julien; Garcia, Celine; Geairon, Philippe.
Ce document compile l’ensemble des bulletins de la surveillance de la santé des mollusques marins émis au cours de l’année 2017 par le réseau REPAMO. Ces bulletins, édités à fréquence mensuelle, relatent les événements de mortalité notifiés au réseau ainsi que les résultats des analyses effectuées lors des prélèvements d’animaux réalisés sur les lieux des mortalités. Les bulletins sont diffusés aux instances professionnelles concernées (CRC, CNC, CDPMEM, CNPMEM, centres techniques), à la DGAL, à la DPMA, aux laboratoires d’analyses, à Ifremer ainsi que sur le site internet du REPAMO. Ils ont pour objectif de tenir les destinataires informés des épisodes de mortalités anormales de mollusques marins rencontrés sur le littoral français métropolitain et corse.
Tipo: Text
Palavras-chave: REPAMO; Surveillance zoosanitaire; Mollusques marins; Mortalités.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00480/59184/61851.pdf

Saxitoxin analysis in bivalve molluscs. Seafoodplus Traceability
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Etienne, Monique.
Paralytic shellfish poisoning (PSP) is caused by consumption of a wide variety of shellfish which accumulated saxitoxins (STXs) from marine dinoflagellates (Alexandrium minutum, A. tamarense, Gymnodinium catenatum, Pyrodinium bahamense) and affect a wide variety of shellfish. There are about 20 saxitoxin analogs with closely related structures. A regulatory level of 0.8 mg/kg shellfish meat as STX equivalents has existed in North America and Europe for many years. The methods of determination of saxitoxins are reviewed: biological assays in vivo and in vitro, biochemical and chemical assays. The mouse bioassay protocol has been widely used and has protected public health for over 50 years using an action level of 0.8 mg/kg STX.2HCL equiv. It is a routine...
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/rapport-6482.pdf

Growth and reproductive performances of juveniles and sexually mature pollack Pollachius pollachius in different conditions
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Omnes, Marie-helene; Severe, Armelle; Barone, Herve; Suquet, Marc; Buchet, Vincent; Le Roux, Annick; Gaignon, Jean-louis; Fostier, Alexis; Fauvel, Christian.
The pollack Pollachius pollachius is a commercially important fish, considered as a candidate for aquaculture in France. Rearing attempts are promising (Suquet et al., 1996), and more information is required about its reproduction, to contribute to a better management of breeders for this species. This study was designed to examine the first maturity in pollack and the effects of conditions such as origin and delayed reproduction season, on gonad maturation, reproductive and growth performances of adults.
Tipo: Text
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00002/11324/7861.pdf

Compte rendu de reunion "recherche-profession" portant sur les systemes de regulation (Lorient Décembre 1986)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: IFREMER.
Within the framework of the agreement signed between the first party, Confédération de la Coopération de la Mutualité et du Crédit Maritimes, and the second party, IFREMER, and at the request of professionals in the sector, a meeting was held on 19 December at Lorient. The objective of the meeting, gathering together six representatives of professionals from the sector and six members from IFREMER, was to open a discussion on existing or potential modes of regulation available today to the European Community. In the context of the theme of cooperation on bio-economic analyses, this workday followed the publication of the F. GAUTIER (1) draft report and was included in the possibility of a critique of this report and a future discussion around the proposals...
Tipo: Text
Palavras-chave: SEM.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/rapport-2255.pdf

Magnetic pattern of the famous zone
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Renard, Vincent.
Surface magnetic anomalies in the Famous area define a typical zebra pattern related to sea floor spreading.This pattern is symmetrical and corresponds to a 1.1 cm/yr half spreading rate up to anomaly 3'. The axis of the central block is off-set from the topographic axis of the rift and indicates either asymmetric spreading in the central zone or a ridge axis jump.These two hypotheses are discussed. [NOT CONTROLLED OCR]
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1976
URL: http://archimer.ifremer.fr/doc/1976/publication-5193.pdf

Anthropogenic CO(2) in the Southern Ocean: Distribution and inventory at the Indian-Atlantic boundary (World Ocean Circulation Experiment line I6)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lo Monaco, C; Metzl, N; Poisson, A; Brunet, C; Schauer, B.
The Southern Ocean, where various water masses are formed ( mode, intermediate, deep, and bottom waters), has a high potential to absorb anthropogenic CO(2) ( C ant). However, most data-based and model estimates indicate low C(ant) inventories south of 50 degrees S. In order to investigate this paradox, the distribution of C(ant) is estimated between South Africa and Antarctica ( World Ocean Circulation Experiment ( WOCE) line I6) based on a back-calculation technique previously used in the North Atlantic ( Kortzinger et al., 1998) and adapted here for application in the Southern Ocean. At midlatitudes (30 degrees-50 degrees S), formation and spreading of mode and intermediate waters results in a deep penetration of C(ant) ( down to 2000 m). South of 50...
Tipo: Text
Palavras-chave: Anthropogenic CO2; Southern Ocean; WOCE.
Ano: 2005
URL: https://archimer.ifremer.fr/doc/00233/34409/32823.pdf

Avis de l'Ifremer sur des Phénomènes sédimentaires inhabituels en baie du Mont-St-Michel
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Noc, Sandrine; Le Mao, Patrick; Rollet, Claire.
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00365/47657/79263.pdf

Pollutions accidentelles et rejets illicites. Sous-région marine Mers celtiques. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cabioc'H, Fanch; Ravailleau, Sylvie.
Tipo: Text
Palavras-chave: Mers celtiques; Pollutions accidentelles; Rejets illicites; Substances dangereuses; Épaves; Impacts.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00329/43969/43541.pdf

L'altération du poisson. Préservation de sa fraicheur
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Soudan, France.
Traditionnellement la dénomination de "poisson frais" s'applique à tout poisson qui n'a reçu depuis sa sortie de l'eau que des traitements capables de retarder les phénomènes du vieillissement naturel sans en changer la nature.
Tipo: Text
Ano: 1950
URL: http://archimer.ifremer.fr/doc/00022/13304/10352.pdf

The Impact of Fisheries Discards on Scavengers in the Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Depestele, Jochen; Feekings, Jordan; Reid, David G; Cook, Robin; Gascuel, Didier; Girardin, Raphael; Heath, Michael; Hernvann, Pierre-yves; Morato, Telmo; Soszynski, Ambre; Savina-rolland, Marie.
A scavenger is an animal that feeds on dead animals (carrion) that it has not killed itself. Fisheries discards are often seen as an important food source for marine scavengers so the reduction of discards due to the Landing Obligation may affect their populations. The literature on scavenging in marine ecosystems is considerable, due to its importance in the trophic ecology of many species. Although discards undoubtedly contribute to these species’ food sources, few can be seen to be solely dependent on carrion (including discards). Ecosystem models predicted that discards contributed very little to the diet of scavengers at a regional scale. A reduction in discards through the Landing Obligation may therefore affect populations for a few species in some...
Tipo: Text
Palavras-chave: Carrion; Discard consumption; Food subsidies; Food web models; Scavengers.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00473/58436/61011.pdf

Recherches sur le germon - Campagnes 1970 de "La Pelagia"
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Aloncle, Henri; Delaporte, Francis.
De nombreuses campagnes de recherches sur les thonidés et plus particulièrement sur le germon ont été faites depuis 1950. Elles ont d'ailleurs donné lieu à diverses publications et notamment à l'établissement d'une carte montrant l'apparition et les déplacements du germon en début de campagne.   Ces recherches ont été reprises systématiquement en 1967 après la mise en service de "La Pelagia", navire spécialement équipé pour cette étude. Les travaux entrepris à bord se situent sur trois plans :   a) aide directe à la pêche par la recherche des concentrations de thons, ces prospections s'effectuent essentiellement à partir de l'examen des conditions hydrologiques des secteurs étudiés ;  b) marquages systématiques des thons blancs et, éventuellement, des...
Tipo: Text
Ano: 1971
URL: http://archimer.ifremer.fr/doc/1971/publication-7005.pdf

MARSITECRUISE R/V Pourquoi pas? October 28th – November 17th, 2014. Leg 3 - Six-Month Cruise Report
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Henry, Pierre; Kende, Julia.
Leg 3 was dedicated to core sampling and to the recovery of geophysical instrumentation. The general objective of core analysis will be to ground truth interpretations of high-resolution seismic data and to identify and date sedimentary events related to earthquakes.
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00434/54534/55904.pdf

Matière organique et pollution par les hydrocarbures dans les sédiments superficiels du golfe d'Arzew (mer Méditerranée, Algérie)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Buscail, R; Foudil-bouras, Ae; Pauc, H.
The distribution of global organic parameters (organic carbon, nitrogen, hydrolyzable carbon) was established in surficial sediments of the Gulf of Arzew. Moreover, humic substances, humin and hydrocarbons have provided information on the organic matter origin and evolution in the identified sedimentary areas: prodeltas at the mouth of the dry rivers Cheliff and Macta; muddy mid-deposits and carbonated shallow environments. The higher organic matter concentrations characterize the muddy mid-deposits and especially the western part located near the Arzew and Bethioua harbours (TOC &gt; 0.9 %; Nt = 0.35 % d.w.). The marine origin of the organic matter is supported by low C/N ratios (5-9) in the total sediments and the position in the Van Krevelen diagram of...
Tipo: Text
Palavras-chave: Sédiment; Matière organique; Substance humique; Hydrocarbure; Marge algérienne; Sediment; Organic matter; Humic substance; Hydrocarbon; Algerian margin.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00325/43612/43914.pdf

Comparative study of three analysis methods (TTGE, flow cytometry and HPLC) for xenobiotic impact assessment on phytoplankton communities
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Stachowski-haberkorn, Sabine; Quiniou, Louis; Beker, Beatriz; Haberkorn, Hansy; Marie, Dominique; De La Broise, Denis.
The impacts of the fungicide Opus(A (R)) (epoxiconazole) on marine phytoplankton communities were assessed in a 12-day field experiment using in situ microcosms maintained underwater at 6 m depth. Three community analysis methods were compared for their sensitivity threshold in fungicide impact detection. When phytoplankton communities were exposed to 1 mu g l(-1) of epoxiconazole, no effects could be demonstrated using TTGE (Temporal Temperature Gradient gel Electrophoresis), flow cytometry or HPLC. When exposed to 10 mu g l(-1), TTGE fingerprints from PCR amplified 18S rDNA of communities exhibited significant differences compared with controls (ANOSIM, P = 0.028). Neither flow cytometry counts, nor HPLC pigment profiles allowed to show significant...
Tipo: Text
Palavras-chave: Microcosm; Phytoplankton community; Epoxiconazole; TTGE; Flow cytometry; HPLC.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00088/19888/17547.pdf

New SERS Substrates For Polycyclic Aromatic Hydrocarbon (PAH) Detection: Towards Quantitative SERS Sensors For Environmental Analysis
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Peron, Olivier; Rinnert, Emmanuel; Compere, Chantal; Toury, T.; De La Chapelle, M. Lamy.
In the investigation of chemical pollutions, such as PAHs (Polycyclic Aromatic Hydrocarbons) at low concentration in aqueous medium, surface-enhanced Raman scattering (SERS) stands for an alternative to the inherent low cross-section of normal Raman scattering. Indeed, SERS is a very sensitive spectroscopic technique due to the excitation of the surface plasmon modes of the nanostructured metallic film.
Tipo: Text
Palavras-chave: Quantitative SERS sensors; Polystyrene beads; PAHs; Nanoparticles.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00012/12328/9113.pdf

Haemocytic neoplasia in Mediterranean mussels (Mytilus galloprovincialis) in the Slovene Adriatic Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gombac, Mitja; Sitar, Rosvita; Pogacnik, Milan; Arzul, Isabelle; Jencic, Vlasta.
The health status of cultured and wild Mediterranean mussels in the Slovene Sea has so far been unexplored. Initially, 1280 adult Mediterranean mussels (Mytilus galloprovincialis), 960 from a shellfish farm and 320 from natural beds, were collected over a one-year period. Water temperature, oxygenation and salinity were measured at each sampling. Mussels were measured and weighted to calculate the condition index and microscopically examined for the presence of haemocytic neoplasia. Haemocytic neoplasia was detected in 14 mussels (1.1%) with a higher prevalence in cultured mussels. Neoplastic cells singularly infiltrated the connective tissue, in small foci or diffusely. Necrosis and multifocal atrophy of digestive tubules were noticed in mussels with...
Tipo: Text
Palavras-chave: Haemocytic neoplasia; Mediterranean mussels; Mytilus galloprovincialis; Slovene Sea.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00144/25512/23959.pdf

Modele tridimensionnel de circulation et de dispersion
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thouvenin, Benedicte; Salomon, J.
Bottom topography, coastal morphology and density variations are the three factors influencing marine current flow in Seine Bay. Numerical modeling allows the study of this tridimensional structure.
Tipo: Text
Palavras-chave: Hodographs; Salinity gradients; Coastal zone; Bottom topography; Mathematical models; Tidal currents; Dispersion; Water circulation.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1260.pdf

La biodéposition des moules, Mytilus edulis, dans le Pertuis Breton : influence du cycle de marée et impact spatial
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kerambrun, Elodie.
La biodéposition liée à l'exploitation des filières de moules est responsable de l' accumulation de particules fines dans l'environnement marin. Cette biodéposition consiste, à travers la formation de feces et de pseudo feces, en un transfert de particules sestoniques, de la tranche d'eau vers le sédiment. Au cours de ce travail nous avons étudié l'influence des cycles de marée et de l'intensité de celle-ci sur la biodéposition, à travers la mesure de flux verticaux de particules. De même, l'impact de cette biodéposition (aspects qualitatifs et quantitatifs) sur le seston a été abordé. Notre étude montre une variation de l'intensité des flux liée au cycle de marée. Les flux les plus importants sont mesurés lorsque les courants sont les plus intenses,...
Tipo: Text
Palavras-chave: Mollusques; Feces; Pseudofeces; Matière organique; Seston; Biodéposition.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00446/55740/57392.pdf

Chaetognathes du plateau continental européen (de la baie ibéro-marocaine à la Mer Celtique)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Reyssac, Josette.
Chaetognaths of the northern part of the European Atlantic Ocean are well known, having been studied, among others, by Russell (1931-1936), J. Furnestin (1938), Southward (1961-1962) in the English Channel; Pierce and Orton (1939), Pierce (1941), Farran (1947), Williamson (1956) in the Irish Sea and Wimpenny (1937) and Russell (1939) in the North Sea. In Scottish waters, Fraser conducted research between 1937 and 1961 and noted, in particular, species typical of southern regions in this boreal zone.M.-L. Furnestin carried out studies in the African waters of the Atlantic Ocean, and over the last ten years she has established biological and ecological features of Atlantic-Mediterranean chaetognath species and given them an ecological classification based on...
Tipo: Text
Ano: 1963
URL: http://archimer.ifremer.fr/doc/1963/publication-4061.pdf

Report on final assessment of methodological improvements and testing
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Griffa, Annalisa; Horstmann, Jochen; Mader, Julien; Rubio, Anna; Berta, Maristella; Orfila, Alejandro; Lars, Axel.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00630/74243/73874.pdf

Réseau Hydrologique Littoral Normand (RHLN) : Rapport 2006 : Cycles hydrobiologiques annuels 2001-2005, évaluation des niveaux trophiques et proposition de réseau hydrologique de suivi de la qualité des masses d'eau DCE pour l'année 2007
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Goff, Ronan; Riou, Philippe.
The Hydrological Network of the Normandy Shoreline (RHLN) was created in September/October 2000 with the dual objective of (1) making it possible to assess the trophic level of the Normandy shoreline's water masses and (2) to define the long-term hydrological monitoring network that can meet the requirements of the Water Framework Directive (WFD) starting in 2007/2008. This report summarises the results obtained between 2000/2001 and 2005.  The first part of the report describes and compares seasonal and inter-year variations of hydrobiological cycles in assorted water masses in Normandy.  The second part of the report assesses the trophic level of Norman water masses by means of indicators proposed by RHLN 2001/2003 (Daniel 2004), and taken up among the...
Tipo: Text
Palavras-chave: RHLN; Réseau hydrologique; DCE; Grille d évaluation de l'eutrophisation; Eutrophisation; Baie de Seine; Normandie; Hydrobiologie; Hydrologie; Ecosystème côtier.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/rapport-2399.pdf

Notos - a galaxy tool to analyze CpN observed expected ratios for inferring DNA methylation types
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bulla, Ingo; Aliaga, Benoit; Lacal, Virginia; Bulla, Jan; Grunau, Christoph; Chaparro, Cristian.
Background: DNA methylation patterns store epigenetic information in the vast majority of eukaryotic species. The relatively high costs and technical challenges associated with the detection of DNA methylation however have created a bias in the number of methylation studies towards model organisms. Consequently, it remains challenging to infer kingdom-wide general rules about the functions and evolutionary conservation of DNA methylation. Methylated cytosine is often found in specific CpN dinucleotides, and the frequency distributions of, for instance, CpG observed/expected (CpG o/e) ratios have been used to infer DNA methylation types based on higher mutability of methylated CpG. Results: Predominantly model-based approaches essentially founded on...
Tipo: Text
Palavras-chave: Epigenetics; DNA methylation; Kernel density estimation; CpG o/e ratio; CpN o/e ratio.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00437/54816/71790.pdf

In search of standardisation: A comparison of toxicity bioassays on two marine crustaceans (Palaemon serratus and Tigriopus brevicornis).
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Dean, Loic; Devineau, J.
In order to mitigate the insufficiency of the number of currently available toxicity tests in marine middle, two studies on the effects of cadmium and zinc were carried through with two marine crustaceans: the prawn Palaemon serratus and a copepoda Tigriopus brevicornis. The comparison of methodologies (rearing conditions - experimental procedure) and results obtained allowed to show the advantages and the disadvantages of these two tests in order to consider a standardization.
Tipo: Text
Palavras-chave: Copepoda; Decapoda; Pollution tolerance; Toxicity tests; Marine crustaceans.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/publication-1780.pdf

L'anchois (engraulis encrasicholus l.) des cotes d'Oranie
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Arrignon, Jacques.
Engraulis encrasicholus L. is a species that is captured all year long off the coasts of Algeria. The studied specimens measured from 8 to 19 cm. The average total length is 14 cm. Throughout the year, the average monthly size does not vary (12.6 to 14.7 cm for the entire species, 12.4 to 15.6 cm for bottom anchovies; the difference is greater for surface anchovies: 9 to 15 cm). During summer, the average is the highest and the most constant. Sizes have different modes during winter and spring. Average lengths are greater than those of the Atlantic specimens. This can be explained by the fact that the continental margin is narrower in the Mediterranean Sea, so that anchovies can find trophic areas closer to the shore (J. FURNESTlN, 1950)....
Tipo: Text
Ano: 1966
URL: http://archimer.ifremer.fr/doc/1966/publication-3973.pdf

La croissance de la dorade, Pagellus centrodontus (Delaroche), dans le gofle de Gascogne (2ème note)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gueguen, Jacques.
Nous avons eu l'occasion, dans une note présentée au Comité des poissons démersaux (Sud), de fournir des données préliminaires sur la croissance de la dorade, Pagellus centrodontus. Au cours de l'année écoulée, nous avons d'une part corrigé certains défauts qui présentait ce travail, d'autre part augmenté le nombre de nos observations, particulièrement sur les poissons de grande taille. Enfin, le problème de la croissance par sexe a été abordé.
Tipo: Text
Palavras-chave: Pegellus centrodontus; Dorade; Croissance; Golfe de Gascogne.
Ano: 1968
URL: http://archimer.ifremer.fr/doc/00142/25324/23401.pdf

A first genetic linkage map of the European flat oyster, Ostrea edulis : towards the identification of Bonamia resistance QTLs
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lallias, Delphine; Lapegue, Sylvie; Haley, Chris; Heurtebise, Serge; Boudry, Pierre; Beaumont, Andy.
The flat oyster Ostrea edulis is an endemic European oyster species, found on both Atlantic and Mediterranean coasts. Its aquacultural production has dramatically decreased due to two successive diseases caused by the intracellular parasites Marteilia refringens and Bonamia ostreae. Since 1985, Ifremer has undertaken a breeding program to produce oyster families which are tolerant to Bonamia. In this context, the next step is to identify QTLs for resistance to this parasite. A genetic map is therefore being established as a basis for QTL work. The reference family is an F2 family produced by single pair mating of two oysters from the same F1 family. The F1 family was itself produced from a bi-parental cross between a wild oyster and an individual from the...
Tipo: Text
Palavras-chave: Genetic linkage map; Parasite; Genetic; QTLs; Resistance; Bonamia ostreae; Ostrea edulis; Flat oyster.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/acte-3464.pdf

Novel signature fatty acid profile of the giant manta ray suggests reliance on an uncharacterised mesopelagic food source low in polyunsaturated fatty acids
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Burgess, Katherine B.; Guerrero, Michel; Marshall, Andrea D.; Richardson, Anthony J.; Bennett, Mike B.; Couturier, Lydie I. E.
Traditionally, large planktivorous elasmobranchs have been thought to predominantly feed on surface zooplankton during daytime hours. However, the recent application of molecular methods to examine long-term assimilated diets, has revealed that these species likely gain the majority from deeper or demersal sources. Signature fatty acid analysis (FA) of muscle tissue was used to examine the assimilated diet of the giant manta ray Mobula birostris, and then compared with surface zooplankton that was collected during feeding and non-feeding events at two aggregation sites off mainland Ecuador. The FA profiles of M. birostris and surface zooplankton were markedly different apart from similar proportions of arachidonic acid, which suggests daytime surface...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00419/53000/53940.pdf

Flottille des Divers petits métiers étang. Façade Méditerranée. 2019. Synthèse des flottilles de pêche.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d’Informations Halieutiques » (SIH) de l’Ifremer, qui constitue le réseau d’observation des ressources halieutiques et des usages associés. Ce projet s’inscrit dans la mission de service d’intérêt public de l’Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l’analyse du secteur des pêches, le SIH a en charge l’élaboration d’indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche et du grand public.
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00649/76132/77095.pdf

Otolith growth in trout Oncorhynchus mykiss: supply of Ca2+ and Sr2+ to the saccular endolymph
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Payan, P; Borelli, G; Priouzeau, F; De Pontual, Helene; Boeuf, G; Mayer Gostan, N.
Kinetic and pharmacological characteristics of Ca2+ fluxes across the saccular epithelium of trout were studied using a perfused isolated inner ear. Ca-45(2+) influx from the Ringer solution to the endolymph was 3-4 nmoles h(-1) mu(-1) endolymph, which corresponds to a global turnover rate of the endolymph calcium of 200% h(-1). Ca2+ entry into the proximal endolymph was faster than into the distal fluid. Net Ca2+ movement across the saccular epithelium depended on the direction and intensity of the chemical gradient of calcium between the Ringer solution and the endolymph. Increasing the calcium concentration in the Ringer solution up to 4.4 mmol l(-1) provoked an accumulation of Ca2+ in both proximal and distal endolymphs, and equilibrium was reached...
Tipo: Text
Palavras-chave: Inner ear; Perfusion; Otolith; Endolymph; Flux; Calcium; Oncorhynchus mykiss; Trout.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/publication-416.pdf

Remote Sensing and Coastal Zone Management
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Loubersac, Lionel.
Tipo: Text
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00089/20058/17699.pdf

Eutrophication disrupts summer trophic links in an estuarine microbial food web
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: López-abbate, M.c.; Molinero, Juan-carlos; Barría De Cao, M.s.; Silva, R.; Negri, R.; Guinder, V.a.; Hozbor, M.c.; Hoffmeyer, M.s.
Eutrophication is the most widespread effect of urban development in coastal areas. To elucidate how nutrient loading affects the carbon pathways at the base of food chains, we quantified the carbon transfer among microbial components, from prokaryotes to microzooplankton. For this purpose, we performed two size-fractionation feeding experiments during late summer under moderate (N: 28.5 μM, P: 0.92 μM, Si: 45.8 μM) and severe (N: 173.9 μM, P: 3.5 μM, Si: 67.2 μM) cultural eutrophication in the Bahía Blanca Estuary (Argentina). In both experiments, prokaryotes were largely dominated by heterotrophic forms, small diatoms dominated among autotrophs, and heterotrophic nanoflagellates were the most abundant among protistan grazers. Under severe eutrophication,...
Tipo: Text
Palavras-chave: Eutrophication; Microbial food web; Bacteria; Nanoflagellates; Microzooplankton; Estuaries.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00512/62335/66718.pdf

Testing of the Argentina oyster, Ostrea puelchana, in several French oyster farming sites
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pascual, Marcela; Martin, Anne-genevieve; Zampatti, Eduardo; Coatanea, Denis; Defossez, Jérôme; Robert, Rene.
Because of diseases affecting fIat oyster Ostrea edulis, acclimatization of the Argentina oyster Ostrea puelchana has been tested in 1989-90 in five French oyster farming sites. Following ICES recommendations , hatchery produced juveniles, from parents imported from Argentina, were transferred to experimental si tes in summer 1989. Very high mortalities occurred, reaching 46 to 98% in March-Apri1 1990. They continued later on, resulting in the end of experiments in March 1991. The growth of surviving oysters was relatively poor in comparison of the local species. Parasites Marteilia refringens and Bonamia ostreae have been detected but at rates inadequate ta explain the high mortalities. AlI these results lead not to retain this species for breeding on...
Tipo: Text
Palavras-chave: Huître; Ostrea puelchana; Parasitologie; Marteilia refringens; Oysters; Ostrea puelchana; Parasitology; Marteilia refringens.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00018/12946/9916.pdf

Considérations sur l'origine et la mise en place des ophiolites des Alpes Occidentales : apport de la connaissance des structures océaniques
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Auzende, Jean-marie; Polino, R; Lagabrielle, Yves; Olivet, Jean-louis.
We suggest that some. ophiolites of the "Schistes Lustrés Nappe" (Western Alps) originated from oceanic massives thrusted and tectonically incorporated into the ocean sediments during early compressive events. This interprétation is supported by field observations and oceanic data.
Tipo: Text
Ano: 1983
URL: http://archimer.ifremer.fr/doc/00184/29500/27851.pdf

La pêche de loisir aux filets sur l'estran landais en 2011
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Morandeau, Gilles.
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00065/17640/15176.pdf

Atlas cartographique projet Valdor. Etude des potentialités de VALorisation des Déchets ORganiques en Vendée
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Penven, Anais; Cesbron, Elodie.
Le projet VALDOR s'inscrit dans une approche durable de la gestion des sous-produits organiques à l'échelle locale. Ce projet co-financé par le Conseil Général de la Vendée et coordonné par le laboratoire STBM de l'IFREMER de Nantes a pour objectif de réaliser une cartographie des gisements de sous-produits organiques toutes filières confondues à l'échelle de la Vendée et de la confronter aux applications potentielle (alimentation animale, fertilisants et énergie) situées sur ce même territoire. L'enjeu étant de définir si d'autres voies de valorisation peuvent être envisagées à échelle locale et dans quelle mesure.
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00117/22842/20652.pdf

The exchange of Intermediate Water in the southeast Atlantic: Water mass transformations diagnosed from the Lagrangian analysis of a regional ocean model
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rimaud, Julie; Speich, Sabrina; Blanke, Bruno; Grima, Nicolas.
Results from a regional ocean model and numerical Lagrangian analyses are compared with in situ measurements to describe the properties and dynamics of Antarctic Intermediate Water (AAIW) in the region of the Cape Basin. The AAIW that originates in the South Atlantic (A-AAIW) at 8 degrees W follows two branches. A southern branch, flowing mostly south of 40 degrees S, is blocked by topography and is deflected westward without significant changes in its physical properties. A northern branch crosses the Cape Basin with strong modification of its physical properties. The AAIW that originates in the Indian Ocean (I-AAIW) flows into the Atlantic Ocean via the Agulhas Current and undergoes small physical changes in the Cape Basin. In the model, the salinity...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00098/20921/18532.pdf

Histoire des traits de vie du Tilapia du Nil (Oreochromis niloticus – Cichlidae), espèce exploitée d’un réservoir subtropical (Laos).
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tessier, Anne; Blin, Charlotte; Cottet, Maud; Kue, Kaoboun; Panfili, Jacques; Chanudet, Vincent; Descloux, Stephane; Guillard, Jean.
Biological traits of Oreochromis niloticus were studied in order to identify potential differences between the population of the Nam Theun 2 Reservoir and other populations in Asia and in Africa. The study also aimed to characterize the demographic structure of the exploited population by fisheries in the reservoir. Toluidine-stained transverse section of otoliths from 322 specimens, collected between November 2015 and January 2017, were analysed to identify the periodicity of annulus formation and to age individuals. Length, weight, sex and sexual maturity stage were recorded. Life history traits were characterized by length-weight and length age relationships. The periodicity of annulus formation was annual, with complete formation of the translucent...
Tipo: Text
Palavras-chave: Otolith; Man-made Lake; South-East Asia; Fisheries.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00626/73771/75176.pdf

Reconstruction of the bottom current strength of overflow water through the Faeroe-Shetland Channel in relation to climate change during the last 135,000 years
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Solheim, Martin.
The focus of this thesis was to reconstruct the bottom current strength around the Faeroe Islands and relate it to the climate variability over the past 35,000 - 135,000 years and the Holocene, using the piston core, JM11-FI-19PC, from the North-eastern shelf of the Faeroe Islands. The core location is ideal for measuring the overflow from the Nordic Seas, as it is strategically placed on top of the Greenland-Scotland Ridge. The investigated time interval includes the last glacial cycle, Weichselian, as well as the Holocene and Eemian. The results are based on sortable silt analysis, IRD and tephra counts, as well as material from previous studies of the investigated core. The results from this thesis is linking higher bottom current strength with...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00505/61705/65674.pdf

Estimates of the mortality and the duration of the trans-Atlantic migration of European eel Anguilla anguilla leptocephali using a particle tracking model
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bonhommeau, Sylvain; Le Pape, O.; Gascuel, D.; Blanke, Bruno; Treguier, Anne-marie; Grima, Nicolas; Vermard, Youen; Castonguay, M.; Rivot, E.
Using Lagrangian simulations, based on circulation models over three different hydroclimatic periods in the last 45 years in the North Atlantic Ocean, the trans-Atlantic migration of the European eel Anguilla anguilla leptocephali was simulated via the passive drift of particles released in the spawning area. Three different behaviours were modelled: drifting at fixed depth, undergoing a vertical migration or choosing the fastest currents. Simulations included mortality hypotheses to estimate a realistic mean migration duration and relative survival of A. anguilla larvae. The mean migration duration was estimated as 21 months and the mortality rate as 3 center dot 8 per year, i.e. &lt; 0 center dot 2% of A. anguilla larvae may typically survive the...
Tipo: Text
Palavras-chave: Migration duration; Leptocephalus mortality; Lagrangian modelling.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6614.pdf

Molecular responses of Ostrea edulis haemocytes to an in vitro infection with Bonamia ostreae
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Morga, Benjamin; Arzul, Isabelle; Faury, Nicole; Segarra, Amelie; Chollet, Bruno; Renault, Tristan.
Bonamiosis due to the parasite Bonamia ostreae is a disease affecting the flat oyster Ostrea edulis. B. ostreae is a protozoan, affiliated to the order of haplosporidia and to the cercozoan phylum. This parasite is mainly intracellular, infecting haemocytes, cells notably involved in oyster defence mechanisms.  Suppression subtractive hybridisation (SSH) was carried out in order to identify oyster genes differentially expressed during an infection of haemocytes with B. ostreae. Forward and reverse banks allowed obtaining 1104 and 1344 clones respectively, among which 391 and 480 clones showed a differential expression between both tested conditions (haemocytes alone versus haemocytes in contact with parasites). ESTs of interest including genes involved in...
Tipo: Text
Palavras-chave: Bonamia ostreae; Protozoan; Ostrea edulis; Flat oyster; Haemocytes; Gene expression; Suppression subtractive hybridisation.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00018/12879/9828.pdf

Culture of freshwater prawn Macrobrachium rosenbergii in the State of Rio de Janeiro, Brazil, from 1981 to 1990
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thomas, Jacques Eric; Lacroix, Denis.
Tipo: Text
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00040/15168/12505.pdf

Re-oligotrophication trajectories of macrophyte assemblages in Mediterranean coastal lagoons based on 17-year time-series
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Fur, Ines; De Wit, Rutger; Plus, Martin; Oheix, Jocelyne; Derolez, Valerie; Simier, Monique; Malet, Nathalie; Ouisse, Vincent.
Since the mid-20th century, Mediterranean lagoons have been affected by eutrophication, leading to significant changes in primary producers. In the early 2000s, management actions have been implemented to reduce nutrient inputs with the aim to achieve a good ecological status as requested by the EU water framework directive. As a result of these actions, a sharp decline in nutrient loads has been recorded in several lagoons leading to an oligotrophication of the water column. The analyses of a long-term data set (1998-2015) of 21 polyhaline and euhaline lagoons with contrasting trophic status allowed us to infer a general scheme for the changes in macrophyte assemblages during the oligotrophication process. Placing hypertrophic and oligotrophic conditions...
Tipo: Text
Palavras-chave: Submerged aquatic vegetation; Recovery; Nutrient reduction; Restoration; Long-term data series; Resilience; Regime shift; Coastal lagoon.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00474/58555/61110.pdf

Lipid remodelling in the reef-building honeycomb worm, Sabellaria alveolata, reflects acclimation and local adaptation to temperature
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Muir, Anna; Nunes, Flavia; Dubois, Stanislas; Pernet, Fabrice.
Acclimation and adaptation, which are key to species survival in a changing climate, can be observed in terms of membrane lipid composition. Remodelling membrane lipids, via homeoviscous adaptation (HVA), counteracts membrane dysfunction due to temperature in poikilotherms. In order to assess the potential for acclimation and adaptation in the honeycomb worm, Sabellaria alveolata, a reef-building polychaete that supports high biodiversity, we carried out common-garden experiments using individuals from along its latitudinal range. Individuals were exposed to a stepwise temperature increase from 15 °C to 25 °C and membrane lipid composition assessed. Our results suggest that S. alveolata was able to acclimate to higher temperatures, as observed by a...
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00354/46551/46361.pdf

Modelisation de la coherence spatiale du bruit genere par les vagues
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Plaisant, M.
Empirical models already exist for ambient noise spectral density function of frequency, sea state or wind speed but they give no information on the spatial structure or coherence of the noise field which is essential as soon as array beamforming is involved. We have developed a model which computes the spatial coherence matrix of the noise field due to a continuous distribution of sources located at the sea surface, and also the noise power spectral density after classical beamforming on an equidistant hydrophones linear array. In this model, propagation effects like rays bending due to variations of index of refraction and multiple bottom and surface reflections are taken into account. Principles of the modeling are presented and results demonstrate that...
Tipo: Text
Palavras-chave: Spectral analysis; Models; Wind speed; Sea surface; Surface water waves; Acoustic equipment; Sound waves; Underwater noise; Ambient noise.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/1990/acte-1143.pdf

Green macroalgae blooms (Ulva spp.) influence trophic ecology of juvenile flatfish differently in sandy beach nurseries
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Jones, Auriane; Quillien, Nolwenn; Fabvre, Axel; Grall, Jacques; Schaal, Gauthier; Le Bris, Hervé.
Tipo: Text
Palavras-chave: Eutrophication; Foraging behavior; Fish diet; Macrobenthic invertebrates; Stable isotopes; Trophic niche; Pegusa lascaris; Pleuronectes platessa; Scoplithalmus maximus; North-East Atlantic.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00594/70603/68797.pdf

Elevage semi-intensif de Peneus japonicus dans les marais de l'Atlantique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Brault, Anne-marie.
Les premiers essais d'élevage de la crevette Pénéide P. japonicus ont eu lieu dès 1967 sur les côtes françaises à partir de post-larves importées du Japon. De 1971 à 1980, de nombreuses tentatives d'élevage ne fournirent pas de résultats transferrables. Depuis les années 80 la production en post-larves étant maîtrisée et un granulé de qualité et de prix satisfaisant était fabriqué industriellement, la station IFREMER de Noirmoutier a entepris des tests de grossissement en extensif et semi-intensif. Les résultats ont montré que la crevette pouvait être élevée dans les marais Atlantiques. Ceux-ci  connaissent souvent une crise économique liée au déclin de la saliculture et à la faible valeur agronomique des terres. Les atouts de la crevette sont nombreux : -...
Tipo: Text
Ano: 1988
URL: http://archimer.ifremer.fr/doc/00427/53817/54799.pdf

Decadal evolution of ligurian sea zooplankton linked to environmental fluctuations. From imaging systems to size-based models
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vandromme, Pieter.
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00070/18172/15731.pdf

Role of bathymetry in Agulhas Current configuration and behaviour - art. no. L23611
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Speich, Sabrina; Lutjeharms, J. R. E.; Penven, P; Blanke, Bruno.
The Agulhas Current forms an important link in the global ocean thermohaline circulation by its role in the interocean exchange of water south of Africa. This process of ring shedding at the current's retroflection is dependent on perturbations to its trajectory that are sensitive to bathymetry. These perturbations may furthermore force the current to intersect shallow regions resulting in substantial changes to its path. A number of other flow characteristics of the system have also been deemed to be influenced by bathymetry. How dependent is Agulhas Current behaviour therefore on the bottom topography? We have used a regional, primitive equation model for initial experimentation. Removing the Agulhas Bank leads to enhanced interocean flux, indicating its...
Tipo: Text
Palavras-chave: Inter ocean exchange; Inter ocean flux; Thermohaline circulation; Southwest Africa; Agulhas current.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2308.pdf

Résultats de la Surveillance de la Qualité du Milieu Marin Littoral. Départements : Gard, Hérault, Aude et Pyrénées Orientales. Edition 2005
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer.
Tipo: Text
Ano: 2005
URL: http://archimer.ifremer.fr/doc/00317/42829/42243.pdf

One Perkinsus species may hide another: characterization of Perkinsus species present in clam production areas of France
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Arzul, Isabelle; Chollet, Bruno; Michel, Justine; Robert, Maeva; Garcia, Celine; Joly, Jean-pierre; Francois, Cyrille; Miossec, Laurence.
Although clam populations in France are known to be infected with protozoans of the genus Perkinsus, no molecular characterization was previously performed on these parasites. Considering that several members of this genus have been associated with mortalities of molluscs worldwide, a study was undertaken in order to characterize these parasites in France. For that purpose, clams, Ruditapes philippinarum and R. decussatus, collected from different production areas and found to be infected with Perkinsus sp. in thioglycolate culture medium, were selected for PCR-RFLP tests and sequencing. Perkinsus olseni was detected in all the investigated areas and results also suggested the presence of P. chesapeaki in Leucate, a lagoon on the Mediterranean coast and in...
Tipo: Text
Palavras-chave: Clam parasites; Perkinsus chesapeaki; Perkinsus olseni; Ruditapes philippinarum; Ruditapes decussatus; Ribosomal RNA; Actin; ISH.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00094/20542/18205.pdf

Les campagnes d'évaluation du stock de coquilles Saint-Jacques en Manche orientale : méthodologie et estimation des indices d'abondance
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vigneau, Joel; Fifas, Spyros; Foucher, Eric.
The methodology used for obtaining absolute abundance indices for Eastern Channel scallop is described in this paper. For the survey (COMOR), stratified multi-stage random sampling is used. The number of sampled units is computed based on variance estimates from the last survey. Knowledge of gear (Brittany dredge with a diving plate) selectivity and efficiency parameters is required for estimating total exploitable biomass and absolute abundance indices by age and strata. Details of the mathematical development of all estimators are given. A non parametric bootstrap provides confidence intervals for all estimates.
Tipo: Text
Palavras-chave: Eastern Channel; Bay of Seine; Dredge; Pecten maximus; Scallop; Survey; Assessment; Manche orientale; Baie de Seine; Drague; Pecten maximus; Coquille Saint Jacques; Campagne; Evaluation.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/rapport-6550.pdf

Neogene evolution and demise of the Amapá carbonate platform, Amazon continental margin, Brazil
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cruz, A.m.; Reis, A.t.; Suc, J.p.; Silva, C.g.; Praeg, D.; Granjeon, D.; Rabineau, Marina; Popescu, S.m.; Gorini, C.
The Amazon continental shelf hosted one of the world's largest mixed carbonate-siliciclastic platforms from the late Paleocene onwards - the Amapá carbonates. The platform architecture, however, remains poorly understood and causes and timing of the cessation of carbonate deposition are still controversial. Here we present a stratigraphic analysis of the Neogene succession of the Amapá carbonates, based on a grid of 2D/3D seismic data correlated to revised micropaleontological data from exploration wells. The results provide improved constraints on the age of the transition from predominantly carbonate to siliciclastic sedimentation, which is shown to have varied through time across three different sectors of the shelf (NW, Central and SE). Four Neogene...
Tipo: Text
Palavras-chave: Mixed carbonate-siliciclastic platform; Carbonate architecture; Chonostratigraphic model; Non-eustatic accommodation; Shelf paleogeography.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00489/60066/63351.pdf

Déclin du rendement sur les concessions ostréicoles de la zone NE du bassin d'Arcachon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Dantec, Jean.
Depuis une dizaine d'années le rendement décline sur les parcs à fond d'argile voisins du littoral entre Arès et Biganos. Les chiffres relevés sur le livre de compte d'un ostréiculteur d'Andernos illustrent ce phénomène.
Tipo: Text
Palavras-chave: Ostréiculture; Huître; Déclin; Croissance; Arcachon; Gironde.
Ano: 1959
URL: http://archimer.ifremer.fr/doc/00004/11494/8060.pdf

Des plasmides bactériens en milieu marin
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tamanai-shacoori, Z; Arturo, M.; Mamez, C.; Cormier, M.
Peu d'études ont été réalisées sur la distribution, le transfert et les fonctions des plasmides existants dans les bactéries de l'environnement (Smith, 1970 ; Glasman et al., 1981 ; Hada et Sizemore, 1981). Hada et Sizemore (1981) en faisant une étude comparative sur le nombre des plasmides contenus dans 440 isolements de Vihrio marins du Golfe de Mexico ont démontré que l'incidence des plasmides est plus importante dans des isolements marins des sites pollués, que dans des isolements marins de sites non contaminés. Par contre, Burton et al. en 1982, en travaillant dans une rivière de South Wales, n'ont pas trouvé de différence significative entre les sites pollués et ceux non pollués sur le pourcentage total des isolements contenant des plasmides ainsi...
Tipo: Text
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00103/21471/19052.pdf

Compte rendu de la commission de visite du gisement de donax de la plage de l’Aber (12 novembre 2015)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Veron, Gerard.
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00298/40902/79652.pdf

Enhancing citizen contributions to biodiversity science and public policy
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Couvet, D.; Jiguet, F.; Julliard, R.; Levrel, Harold; Teyssedre, A.
Citizen science, defined as participation of the general public in scientific research, could significantly help scientists to address biodiversity issues, through (i) monitoring the state of biodiversity, (ii) framing indicators which synthesise and communicate information on the state of biodiversity, (iii) building scenarios to evaluate the plausible consequences of different policies. A key asset of citizen science is that participating citizens disseminate the information they gain, thereby increasing the profile of issues being researched. We review further benefits associated with biodiversity monitoring, indicators and policy scenarios, envisioned as collaborative tools between scientists and citizens. Such collaboration promotes both the...
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-6214.pdf

Estimations satellitales de la couleur de l'eau lagonaire à l'aide des produits Sentinel-2
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rintz, Cam Ly.
The lagoon of New Caledonia is subject to various pressures, including terrigenous stream inputs. Their evolution – extent, intensity – can be studied through parameters such as ocean color, depending on turbidity or phytoplankton concentration. Satellite imagery is more and more used for this purpose. As the Sentinel-2 (S2) mission, with its satellites providing ten meters-resolution images, has been recently launched, we worked on the characterisation of lagoon color using these products. After testing the performance of existing algorithms for New Caledonia, initially applied to satellites other than S2, we tried to establish a new turbidity algorithm based on field data (measures in the South-West lagoon of New Caledonia and the lagoon near Koumac in...
Tipo: Text
Palavras-chave: Couleur de l’eau; Turbidité; Satellite; Télédétection; Réflectance; Lagon; Nouvelle-Calédonie; Sentinel-2.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00645/75752/76712.pdf

Les captures de poissons amphyhalins pendant les campagnes CGFS
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Coppin, Franck; Delpech, Jean-paul.
Cartographie de la présence des espèces de poissons amphyhalines capturées pendant la campagne CGFS (Channel Ground Fish Survey) en octobre en Manche Est depuis 1988.
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00154/26572/24706.pdf

Etude de la production de juvéniles de saumon atlantique (Salmo salar). II - Influence de la densité sur l'alevinage. Campagne 1980-1981 Pisciculture du Quinquis
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gaignon, Jean-louis; Prouzet, Patrick.
Les résultats de la campagne 1979-1980 ont montré la nécessité d'améliorer les performances de l'alevinage pour obtenir des résultats de production intéressants en cycle ouvert dans les conditions bretonnes. En effet, une augmentation du taux de smoltification à un an ne semble pouvoir être obtenue dans des conditions économiquement intéressantes (Charge très supérieure à 2 kg/m2), qu'à condition que la taille des tacons soit au moins égale à 6-7 cm en septembre de la première année. En conséquence, l'objectif expérimental de la saison 1980-1981 est de déterminer les conditions d'élevage qui puissent permettre d'obtenir un population homogène ayant une bonne croissance c'est-à-dire très supérieure à celle obtenue en 79-80....
Tipo: Text
Palavras-chave: Aquaculture; Pisciculture; Production; Juvéniles; Salmo salar; Densité.
Ano: 1981
URL: http://archimer.ifremer.fr/doc/00143/25381/23519.pdf

Directive Cadre eau - District "Corse" : Contrôles de surveillance/opérationnel (campagne DCE 2009)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Andral, Bruno; Sargian, Peggy.
Les programmes de surveillance liés à la mise en œuvre de la DCE sont coordonnés par le Ministère de l’Ecologie, du Développement Durable, des Transports et du Logement (MEDDTL). Dans chaque bassin hydrographique ce sont les Agences de l’eau qui, avec l’Etat, prennent en charge l’application, la mise en œuvre de ces réseaux.  Sur la façade méditerranéenne, Ifremer a assuré pour le compte du Schéma Directeur des Données sur l’Eau la maîtrise d’ouvrage de la deuxième campagne du contrôle de surveillance et la première campagne du contrôle opérationnel, en coordonnant l’ensemble de l’acquisition des données et de leur synthèse en collaboration avec de nombreux partenaires : les Universités, des bureaux d’études, des structures locales de gestion et les...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00028/13918/11086.pdf

A benthic Si mass balance on the Congo margin: Origin of the 4000 m DSi anomaly and implications for the transfer of Si from land to ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ragueneau, O.; Regaudie-de-gioux, A.; Moriceau, B.; Gallinari, M.; Vangriesheim, Annick; Baurand, F.; Khripounoff, Alexis.
To elucidate the origin of the silicic acid (DSi) anomaly observed along the 4000 isobath on the Congo margin, we have established a benthic Si mass balance and performed direct measurements of biogenic silica (bSiO(2)) dissolution in the deep waters and in the sediments. Results strongly suggest that the anomaly originates from the sediments; the intensity of DSi recycling is consistent with the degradation of organic matter, as observed from Si:O-2 ratios in the benthic fluxes compared to that ratio observed in the anomalies. Strong imbalances, observed in both the Si and C mass balances, suggest that the biogenic matter that degrades and dissolves in these sediments near 4000 m does not come from pelagic sedimentation. It is probably not coming also...
Tipo: Text
Palavras-chave: Congo; Continental margin; Preservation; Dissolution; Biogenic silica.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-7410.pdf

Economie maritime en Bretagne : changeons de regard
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dosdat, Antoine; Moulinier, Herve.
Mieux connaître est l’étape essentielle, pour mieux comprendre, décider et agir, donc éclairer les politiques publiques et privées. Cet éclairage qui se doit d’être dynamique et dans la durée, permet de focaliser les énergies, les investissements et d’anticiper les transformations. Mieux connaître c’est aussi la condition nécessaire pour faire connaître.  Faire connaître les pépites et fleurons de l’économie maritime de la Bretagne, les success stories, les champs nouveaux d’innovation, les domaines d’excellence et de croissance dans la droite ligne de la spécialisation intelligente. Avant-propos Faire connaître au-delà des frontières nationales pour attirer les investisseurs, attirer et retenir les talents, pour éduquer à la mer nos jeunes concitoyens, et...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00220/33154/31654.pdf

Proceedings of the 2nd Mediterranean Symposium on the conservation of Dark Habitats (Antalya, Turkey, 17 January 2019)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: UNEP/MAP; SPA/RAC.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00482/59397/62163.pdf

Mapping the Intertidal Microphytobenthos Gross Primary Production, Part II: Merging Remote Sensing and Physical-Biological Coupled Modeling
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Savelli, Raphael; Méléder, Vona; Cugier, Philippe; Polsenaere, Pierre; Dupuy, Christine; Lavaud, Johann; Barnett, Alexandre; Le Fouest, Vincent.
Microphytobenthos (MPB) at the sediment surface of intertidal mudflats are known to show a high spatial and temporal variability in response to the biotic and abiotic conditions prevailing at the mud surface. It makes long-term and large-scale monitoring of MPB Gross Primary Production (GPP) difficult to set up. In this study, we developed the first 3D physical-biological coupled model (MARS-3D) that explicitly simulates GPP of intertidal MPB at the mudflat scale, and we compared the outputs with in situ and space remote sensing MPB GPP data. We discuss the sources of discrepancies between the modeling and the remote sensing approach in the light of future developments to be done. For instance, the remote sensing algorithm provides a very synoptic view of...
Tipo: Text
Palavras-chave: Microphytobenthos; Intertidal mudflat; Gross primary production; Remote sensing; Physical-biological modeling.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00654/76612/77764.pdf

Etude préalable à la mise en place d'aide à la gestion globale de l'eau dans le Marais Poitevin-Volet maritime-Synthèse des données existantes-Proposition d'acquisition de données complémentaires-Annexe 3 : cartes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Tipo: Text
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00104/21478/19059.pdf

Les variations morphologiques de Sagitta setosa Müller et ses rapports avec deux espèces voisines
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Furnestin, Marie-louise.
This note can be summarized in a few lines. It aimed to demonstrate that:1° S. setosa Müller, in its different distribution areas (North Sea, Mediterranean Sea, Black Sea), is prone to undergo some variations in its size (especially the length of its caudal segment and ovaries); variations that cannot break the unity of the species;2° S. euxina Moltshanoff can be seen as a larger S. setosa; which could be called S. setosa var. euxina because of its distribution;3° it could be confirmed that S. friderici Ritter-Zahony can be considered as a relative species of S. setosa.
Tipo: Text
Ano: 1958
URL: http://archimer.ifremer.fr/doc/1958/publication-4598.pdf

La dynamique sedimentaire dans les estuaires de la Baie de Seine. Consequences sur l''environnement
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Avoine, J; Dubrulle, L; Larsonneur, C.
Tides and fluvial flow rate, factors of estuarine dynamics, explain physicochemical and biological properties, silting and clogging of these environments. Seine Bay is a macrotidal environment into which discharge several estuaries (Seine, Orne, Veys Bay). After speaking about the characteristics of water and sediment dynamics, the authors deal with the effects of man-made modifications and the necessity to protect the environment.
Tipo: Text
Palavras-chave: ANE; France; Basse Normandie; Orne estuary Temporal variations Sedimentation Stream flow Residual flow Environmental effects Estuaries Sediment dynamics.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1282.pdf

Habitats particuliers de l’infralittoral : herbier à Posidonia oceanica. Sous-région marine Méditerranée occidentale. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sartoretto, Stephane; Baucour, Colombe.
Tipo: Text
Palavras-chave: Méditerranée; Habitat particulier; Infralittoral; Herbier; Posidonia oceanica; Distribution; Etat écologique.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00331/44204/43773.pdf

A worldwide review of purse seine fisheries on FADs
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fonteneau, Alain; Pallares, P; Pianet, Renaud.
This paper develops a comparative overview of the development of Fish Aggregating Devices (or fads) by the tropical purse seine fisheries in various ocean areas (Atlantic, Indian, Western and Eastern Pacific Oceans). First, a comparative review of fishery statistics is developed. Recent catches on fads by purse seiners can be estimated at a level of one million tons yearly. This comparison allows to describe the fishing zones and catch trends over time, the species composition and size taken in the various fad fisheries. Skipjack tuna is the dominant species in most fad fisheries, but significant amounts of yellowfin and bigeye are also frequently taken under fads. The paper also presents an overview of various observer data concerning the by-catches of...
Tipo: Text
Palavras-chave: Attracting techniques Fisheries Purse seines Size Tuna fisheries Article Geographic Terms: A; Atlantic I; Pacific ISW; Indian Ocean.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00042/15278/12664.pdf

Procédé d'extrusion réactive et/ou enzymatique pour l'extraction de phycocolloïdes : application aux produits de la mer
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Makoure, Dounia; Arhaliass, Abdellah; Echchelh, Adil; Baron, Regis; Legrand, Jack.
In this paper we present the reactive extrusion process to extract the phycocolloids from the sea products. By comparing with other techniques, this process has a several advantages like the economic return, the flexibility, the production of various products with different characteristics and time gains. There are two types of extruder: single-screw and double-screw, each one has its specific properties. The solid products are introduced by means of the hopper that is equipped with a dosage pump for the regulation of the flow. Liquid products are, generally, injected in the not filled zones, through an external pump. The products undergo thermo mechanical modifications and then the shaping of the final products was done in the die. The reactive extrusion...
Tipo: Text
Palavras-chave: Extrusion réactive; Valorisation; Coproduits; Produits de la mer; Phycocolloïdes alginate; Reactive extrusion; Valorization; By-products; Sea-products; Phycocolloids; Alginate.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00500/61171/64645.pdf

Etude de la contamination microbiologique du milieu littoral : identification des sources de contamination fécale et évaluation de la persistance des bactéries entériques dans l'environnement
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gourmelon, Michele.
La contamination de l’environnement par des bactéries ou des virus d’origine fécale par le biais des rejets résultant des activités urbaines ou agricoles constitue un risque important pour la santé humaine et une préoccupation pour la pérennité de certains usages en zone littorale. La bactérie Escherichia coli (E. coli) a été retenue comme indicateur de contamination fécale pour évaluer la qualité sanitaire des zones conchylicoles et des zones de baignade et pour établir leur classification.  L’étude des bactéries entériques et des marqueurs de l’origine des contaminations fécales dans l'environnement littoral constitue l’essentiel de mes activités de recherche à l’Ifremer. C’est ce travail qui sera présenté lors de cette soutenance.  J'’ai tout d’abord...
Tipo: Text
Palavras-chave: Contamination microbiologique; Littoral; Bactéries entériques; Environnement; Contaminatin fécale.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00256/36764/35369.pdf

Response to selection for growth in an interspecific hybrid between Oreochromis mossambicus and O. niloticus in two distinct environments
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: De Verdal, Hugues; Rosario, Westly; Vandeputte, Marc; Muyalde, Nerafe; Morissens, Pierre; Baroiller, Jean-francois; Chevassus, Bernard.
The development of a saline tolerant tilapia strain able to grow fast is of importance in the Philippines, where 240 000 ha of brackish water ponds are available. To this end, founder hybridization between Oreochromis niloticus (with favorable growth traits) and O. mossambicus (with favorable salinity tolerance traits) was performed and followed by backcrossing with O. mossambicus to develop a strain highly tolerant to saline environments. Genetic selection for growth performance was subsequently conducted. The aim of the present study was to estimate growth performance and survival of the hybrid in two rearing environments following four generations of genetic selection.  A comparison between the hybrid and an internal reference line was performed in two...
Tipo: Text
Palavras-chave: Salinity tolerance; Selection; Hybridization; Genetic gain; Heritability; Survival rate.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00187/29836/28287.pdf

The dispersion of adhered marine bacteria by pyrophosphate and ultrasound prior to direct counting.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Velji, M; Albright, L.
A technique has been investigated for dispersing adhered marine bacteria from various surfaces prior to direct counting. The bacterial cells were initially preserved and strengthened by use of 3.7% formaldehyde (v/v final concentration). Seawater samples were then treated with 0.001 M of tetrasodium pyrophosphate (final concentration), a sequestering and deflocculating agent. Surface sediment and kelp disc samples were treated with 0.01 M tetrasodium pyrophosphate (final concentration) after having been suspended in 0.44 M sodium chloride solution. These samples were incubated for 15-30 min. Subsequently, the samples were treated with ultrasound (100 W) for 30 to 45 s. This technique resulted in an even dispersion of most bacterial cells in the samples....
Tipo: Text
Palavras-chave: Bacteria; Microbiological analysis; Flocculation; Ultrasonics; Bacterial counters.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-968.pdf

Lay and scientific categorizations of new breeding techniques: Implications for food policy and genetically modified organism legislation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Debucquet, Gervaise; Baron, Regis; Cardinal, Mireille.
The rapid development of new genetic breeding techniques is accompanied by a polarized debate around their risks. Research on the public perception of these techniques lags behind scientific developments. This study tests a method for revealing laypeople’s perceptions and attitudes about different genetic techniques. The objectives are to enable laypeople to understand the key principles of new genetic breeding techniques and to permit a comparison of their modes of classification with those of scientific experts. The combined method of a free sorting task and focus groups showed that the participants distinguished the techniques that did not induce any change in DNA sequence, and applied two different logics to classify the other breeding techniques: a...
Tipo: Text
Palavras-chave: Food policy; Genetically modified organism regulation; Genetically modified organisms; Lay categorization; New breeding techniques; And public understanding.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00634/74604/74979.pdf

Upper cretaceous to quaternary sedimentary process in the bay of biscay from textural, mineralogical, and coarse fraction studies
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Auffret, Gérard-andré; Pastouret, Léo.
The evolution of the sedimentary regime that prevailed on the Armorican margin from Late Cretaceous to late Tertiary is herein discussed and interpreted. The sedimentation budget of four components of the sediment : calcium carbonate, quartz, "less than 10  m non carbonate material,"and biogenic silica are quantified as is the composition of the coarse fraction and the textural properties of the sediment. Variation of the coarse fraction components is directly related to change in the oceanic environment (terrigenous supplies, productivity, calcium carbonate dissolution). Sediment texture is a function of many factors, comprising lithology, dissolution action, and hydrodynamic control. The medians of the silt fractions from bulk and decalcified sediments...
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/publication-5256.pdf

OV2SLAM: A Fully Online and Versatile Visual SLAM for Real-Time Applications
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ferrera, Maxime; Eudes, Alexandre; Moras, Julien; Sanfourche, Martial; Le Besnerais, Guy.
Many applications of Visual SLAM, such as augmented reality, virtual reality, robotics or autonomous driving, require versatile, robust and precise solutions, most often with real-time capability. In this work, we describe OV 2 SLAM, a fully online algorithm, handling both monocular and stereo camera setups, various map scales and frame-rates ranging from a few Hertz up to several hundreds. It combines numerous recent contributions in visual localization within an efficient multi-threaded architecture. Extensive comparisons with competing algorithms shows the state-of-the-art accuracy and real-time performance of the resulting algorithm. For the benefit of the community, we release the source code: https://github.com/ov2slam/ov2slam .
Tipo: Text
Palavras-chave: SLAM; Localization; Mapping; Field robotics.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00684/79583/82305.pdf

Argo quality control manual for dissolved oxygen concentration
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thierry, Virginie; Bittig, Henry; The Argo-bgc Team,.
This document is the Argo quality control manual for Dissolved oxygen concentration. It describes two levels of quality control: • The first level is the real-time system that performs a set of agreed automatic checks.  • Adjustment in real-time can also be performed and the real-time system can evaluate quality flags for adjusted fields  • The second level is the delayed-mode quality control system.
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00354/46542/59751.pdf

The circulation of norwegian sea overflow water in the eastern north-atlantic
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Harvey, Jg; Theodorou, A.
Neutral surfaces are defined from historical hydrographie data on which the spreading of Iceland-Scotland overflow water (ISOW) may be examined in the eastern North Atlantic and the lrminger Basin. Each of these neutral surfaces occurs at less than 400 rn on the Iceland-Faroe rise, but they descend to depths in excess of 2 600 rn (shallowest) and 3 600 rn (deepest) in the area of study. Salinity distribution on these surfaces provides a first indication of circulation patterns. e-S water mass analysis, using successive mixing stages of ISOW is generally found to be satisfactory, but in the south-eastern part of the region a third water mass characteristic is required. Oxygen data from cruises between 1957 and 1962 are re-examined and, after the...
Tipo: Text
Ano: 1986
URL: http://archimer.ifremer.fr/doc/00110/22091/19732.pdf

Ponte, incubation et développement larvaire du rouget de roche ( Mullus surmuletus ) en laboratoire
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Menu, Bruno; Girin, Michel.
A batch of red mullet spawners, held in captivity, spawned for 3 years in a 20 m3 tank. The eggs were incubated between 9 and 18° C, and hatched normally. The relationship between incubation time and temperature was calculated. Several rearing trials were performed at  19° C, in 150 l tanks. SurvivaIs up to 32 days were obtained, but metamorphosis was not yet completed at that age. The corresponding growth curves were drawn, and the Iarval development of the species was studied in detail.
Tipo: Text
Ano: 1978
URL: http://archimer.ifremer.fr/doc/00138/24885/22976.pdf

Late Quaternary variations in sea surface temperatures and their relationship to orbital forcing recorded in the Southern Ocean (Atlantic sector)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Brathauer, U; Abelmann, A.
Late Quaternary summer sea surface temperatures (SSTs) have been derived from radiolarian assemblages in the East Atlantic sector of the Southern Ocean. In the subantarctic and the polar frontal zone, glacial SSTs (oxygen isotope stages 2, 4, 6, and 8) were 3 degrees-5 degrees C cooler than today, indicating northward displacements of the isotherms about 2 degrees-4 degrees of latitudes. During interglacials, SSTs almost reached modern levels (oxygen isotope stages 7 and 9) or exceeded them by 2 degrees-3 degrees C (oxygen isotope stages 1 and 5.5). In the subantarctic Atlantic Ocean, changes in SST and calcium carbonate content of the sediment precede variations in global ice volume in the range of the main Milankovitch frequencies. Comparisons with the...
Tipo: Text
Ano: 1999
URL: https://archimer.ifremer.fr/doc/00239/35066/34590.pdf

Rapport d'activités 2018 du Laboratoire Environnement Ressources Conchylicoles du Morbihan-Pays de Loire
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cochennec-laureau, Nathalie; Bellec, Gwenael; Bizzozero, Lucie; Bonneau, Francoise; Bouget, Jean-francois; Bouvier, Calypso; Collin, Karine; Fortune, Mireille; Gabellec, Raoul; Le Merrer, Yoann; Manach, Soazig; Mellor, Alice; Pierre-duplessix, Olivier; Reboul, Sebastien; Retho, Michael; Roux, Pauline; Schapira, Mathilde; Schmitt, Anne; Souchu, Philippe; Stanisiere, Jean-yves.
Activités d’observation, de surveillance de la qualité des eaux littorales du Morbihan, Pays de Loire et Nord Vendée et résultats des projets de recherche 2018
Tipo: Text
Palavras-chave: Réseaux de surveillance et d’observation; Qualité des écosystèmes marins littoraux du Morbihan; Pays de Loire; Microbiologie; Phytoplancton; Eutrophisation; Ressources exploitées; Huîtres; Moules.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00481/59245/61969.pdf

Influence de la pollution urbaine sur la vitalité des herbiers à posidonies dans le golfe de Giens (Var)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Maggi, Pierre; Gruet, Yves; Lassus, Patrick; Kalifa, Francis.
Les posidonies sont des phanérogames marines qui existent actuellement en deux endroits du globe : en Méditerranée (Posidonia oceanica DELILE) et sur les côtes sud de l'Australie (P. australis J.D. HOOKER). En Méditerranée, l'herbier de posidonies occupe une grande partie des fonds meubles de la zone photophile de l'étage infralittoral (PÉRÈs et PICARD, 1964). Il joue un rôle capital dans la fixation des sédiments meubles et constitue un milieu privilégié pour le développement et la croissance de nombreuses espèces animales marines.
Tipo: Text
Ano: 1977
URL: http://archimer.ifremer.fr/doc/1977/publication-7129.pdf

Sennes coulissantes à Petits pélagiques. Occitanie. 2018. Observation des Marées au débarquement - OBSDEB
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public. Ces indicateurs intègrent...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00597/70865/69098.pdf

Bulletin d'information PREVIMER - Informations et analyses des eaux côtières. Septembre Octobre 2009 - n°10
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Equipe projet PREVIMER.
Sommaire * Météo et débits des fleuves.....2 * Caractéristiques des masses d’eau côtières..............5 * Production biologique............11 * Les faits marquants................14 * Rappel des objectifs du bulletin PREVIMER..................15 * Les moyens d’observations et de prévisions de l’état des mers côtières...........................15 * Glossaire..................................17
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00242/35363/33864.pdf

L'élevage des salmonidés migrateurs amphibiotiques en Amérique du nord
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Harache, Yves; Boulineau, Jean-jacques.
In this dissertation, we aimed to provide an outline of the projects carried out on the northern American continent in the culture of amphibiotical migratory salmonids, gathering information in order to apply them to a river repopulating project and contribute to the development of French aquaculture.
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1971
URL: http://archimer.ifremer.fr/doc/1971/rapport-4847.PDF

Mesure de l'absorption des nutriments (Ammonium - Nitrate - Phosphate) par les thalles de Gracilaria verrucosa de l'étang du Méjean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Auby, Isabelle.
Tipo: Text
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00148/25956/24047.pdf

Surveillance du Milieu Marin. Travaux du RN0. Édition 1988
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Tipo: Text
Ano: 1988
URL: http://archimer.ifremer.fr/doc/00327/43806/43372.pdf

Sorosite (eta-Cu6Sn5)-bearing native tin and lead assemblage from the Mir zone (Mid-Atlantic Ridge, 26 degrees N)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dekov, Vm; Damyanov, Zk; Kamenov, Gd; Bonev, Ik; Rajta, I; Grime, Gw.
A number of small, irregular-shaped and spherical shiny metallic particles have been found in the sediments from the Mir zone, Trans-Atlantic Geotraverse hydrothermal held (Mid-Atlantic Ridge, 26 degreesN). The phase variety of the particles examined is represented by metallic tin: tin-rich lead, and tin-copper phases. A detailed mineralogical study of these particles was carried out using optical microscopy, nuclear microscopy, scanning electron microscopy, electron microprobe, proton microprobe and X-ray diffraction analysis. Tin-lead grains have the typical eutectic microtexture of the metal components. Tin-copper grains are formed from single crystals of sorosite, eta -Cu6Sn5. The Sn-Pb-Cu complex grains are composed of fine stannoan lead...
Tipo: Text
Palavras-chave: Zone hydrothermale; Dorsale médio-Atlantique; Étain et plomb natifs; Sorosite; Hydrothermal field; Mid-Atlantic Ridge; Native Sn and Pb; Sorosite.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00322/43350/42876.pdf

Progressive shoaling of the equatorial Pacific thermocline over the last eight glacial periods
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Regoli, Fabienne; De Garidel-thoron, Thibault; Tachikawa, Kazuyo; Jian, Zhiming; Ye, Liming; Droxler, Andre W.; Lenoir, Guillaume; Crucifix, Michel; Barbarin, Nicolas; Beaufort, Luc.
The depth of equatorial Pacific thermocline is diagnostic of the main modes of tropical climates. Past estimates of Pacific thermocline dynamics have been reconstructed either for the Last Glacial Maximum or on longer timescales at low resolution. Here we document a new high-resolution set of reconstructed past sea surface and subsurface waters temperatures from the southwestern subequatorial Pacific, core MD05-2930, in the Gulf of Papua, over the last 800 ka. We used two morphotypes of Globigerinoides ruber known to live at different water depths to reconstruct past stratification. We estimated calcification temperature of each morphotypes by Mg/Ca paleothermometry. Our subequatorial Pacific thermocline paleotemperature record indicates a response of the...
Tipo: Text
Palavras-chave: Equatorial Pacific; Thermocline; Pleistocene.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00295/40572/39477.pdf

Etude de l'influence des activités aquacoles sur les flux de matière des marais maritimes : Baie du Fiers d'Ars
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Buestel, Alexis.
Les marais maritimes ont été, depuis près de dix siècles, exploités et aménagés par l'homme à des fins salicoles, aquacoles ou agricoles grâce à la construction de digues et de polders. lls représentent  aujourd'hui un secteur important de l'économie des pertuis charentais. Le Fiers d' Ars est une baie entourée de marais mati times, située au nord est de l'île de Ré. L'exploitation de ces marais a commencé dès le XVème siècle par la saliculture. Aujourd'hui, l'activité anthropique s'est diversifiée. On y rencontre, en plus de la saliculture qui a fortement baissé, de l'ostréiculture, de la pisciculture extensive et intensive, et surtout un tourisme très important, avec notamment la création, en 1981, de la réserve de Lilleau des Niges. Ces différentes...
Tipo: Text
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00439/55032/56464.pdf

Évaluation DCE décembre 2008, Éléments d’expertise - Élément de qualité : phytoplancton, Agence de l’eau : Adour-Garonne
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Soudant, Dominique; Belin, Catherine.
La Directive Cadre sur l’Eau (DCE 2000/60/CE) du 23 octobre 2000 définit un cadre pour la gestion et la protection des eaux par grand bassin hydrographique au plan européen. Elle fixe un objectif de bon état écologique et chimique pour les eaux superficielles. La Directive s’appuie sur l’évaluation d’un certain nombre d’éléments de qualité pour définir l’état global d’une masse d’eau. La liste des éléments de qualité à prendre en compte varie selon la catégorie d’eau superficielle. Le phytoplancton figure parmi les éléments de qualité biologiques retenus pour la classification de l'état écologique des masses d’eaux littorales, c’est à dire les eaux côtières et de transition. Il est évalué à partir de trois composantes : biomasse, abondance et composition...
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00014/12570/9469.pdf

Self-sampling of cod in the Celtic Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bellail, Robert; Peronnet, Isabelle; Rochet, Marie-joelle; Lamothe, Julien.
Since 2003, the application of restrictive TAC for cod in area VIIb-k has led some French Professional Organisations to manage their restrictive quota by imitations of landings by trip or period or by prohibiting the landings of the smallest commercial category. In consequence of that, le level of discarding has increased by high grading practice. In the lack of available and reliable data to estimate the level of discarding and the amount of discarded fish, the assessment of Celtic Sea Cod in Divisions VIIe-k has been in recent years more and more uncertain, especially in estimating younger year classes, for a fishery which can be qualified as a recruitment fishery. On a Professional Organisation (PMA= Pêcheries Manche-Atlantique) initiative and in the...
Tipo: Text
Palavras-chave: Protocole; Discard; Trawler; Sampling; Celtic sea; Cod; Protocole; Rejet; Chalutier; Echantillonnage; Mer Celtique; Cabillaud.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/rapport-6106.pdf

Système planctonique et pollution urbaine. Un aspect des populations zooplanctoniques
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Groupe EPOPEM.
Tipo: Text
Ano: 1979
URL: http://archimer.ifremer.fr/doc/00122/23353/21180.pdf

Magnetic navigation behavior and the oceanic ecology of young loggerhead sea turtles
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Putman, Nathan F.; Verley, Philippe; Endres, Courtney S.; Lohmann, Kenneth J.
During long-distance migrations, animals navigate using a variety of sensory cues, mechanisms and strategies. Although guidance mechanisms are usually studied under controlled laboratory conditions, such methods seldom allow for navigation behavior to be examined in an environmental context. Similarly, although realistic environmental models are often used to investigate the ecological implications of animal movement, explicit consideration of navigation mechanisms in such models is rare. Here, we used an interdisciplinary approach in which we first conducted lab-based experiments to determine how hatchling loggerhead sea turtles (Caretta caretta) respond to magnetic fields that exist at five widely separated locations along their migratory route, and then...
Tipo: Text
Palavras-chave: Magnetic orientation; Navigation; Magnetoreception; Caretta caretta; Ocean circulation model.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00626/73855/73692.pdf

Statistique des pêches maritimes - Années 1986 et 1987
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Tipo: Text
Ano: 1988
URL: http://archimer.ifremer.fr/doc/00163/27422/25653.pdf

Cartographie krigée des mollusques suspensivores compétiteurs trophiques des huîtres du bassin de Marennes-Oléron : l'implications pour la planification de l'échantillonnage
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sauriau, Pierre-guy; Bacher, Cedric.
Stock assessement of wild soft-bottom mol/uses has been part of a general approach to shellfish management in oyster farming in Marennes-Oleron Bay. A sampling survey is described as a stratified random sampling after optimum allocation of the sample sire in each stratum. The aim of this study is ta ilIustrate the use of kriging techniques in the case of suspension-feeders. Regarding suspension-feeding molluscs. trophic competitors of the oyster Crassostrea gigas the whole stratified design produced an estimation with a precision around 25%. Then the geostatistical technique. i.e. kriging was used to depict the spatial and variability patterns of several trophic groups. The biomass data are expressed in ash-free. dry-weight units. In addition, the...
Tipo: Text
Palavras-chave: Marennes Oléron; Crassostrea gigas; Krigeage; Suspensivore; Echantillonnage stratifié; Peuplement benthique.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/publication-3055.pdf

Influence du climat sur le recrutement et sur la production d'huîtres cultivées (Crassostrea angulata et Crassostrea gigas) dans le bassin de Marennes-Oléron (France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Heral, Maurice; Deslous-paoli, Jean-marc; Prou, Jean.
Recruitment, marketed yield and cultivated biomasses of oysters Crassostrea angulata and Crassostrea gigas are compared to climatic indices for the period 1885-1984. Temperature plays a role up on the date of spawning but explains only partially the failure of recruitment, which has less influence on the marketed yield than on the total biomass Contrary to the sensitivity of wild molluscan stocks to climatic conditions, yield and biomass of these cultivated stocks are not hightly correlated to the annual and seasonal indices of rainfall and air temperature.
Tipo: Text
Palavras-chave: Marennes Oleron Bay; Climatic conditions; Recrutment; Crassostrea gigas; Crassostrea angulata; Oysters; Marennes Oléron; Facteurs climatiques; Recrutement; Crassostrea gigas; Crassostrea angulata; Huîtres.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/acte-2972.pdf

Authigenic uranium in marine sediments of the Benguela Current upwelling region during the last glacial period
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Yu, Ef; Liang, Ch; Chen, Mt.
Anomalously high uranium contents and U-238/Th-232 activity ratios deposited during the oxygen isotope stages 2 to 4 are observed in the MD962085 core from the Benguela Current upwelling area. In conjunction,vith the activity ratio of U-234/U-238, the high uranium contents found in this core cannot be considered as detrital; instead, they must be of authigenic origin. The high biological productivity in the overlying seawater may have induced a high flux of organic matter resulting, directly or indirectly, in a reducing environment, and may have led to the addition of authigenic uranium to the sediments during the last glacial period. The correspondence between the variations in authigenic U content, %TOC, and Th-230(ex)-normalized TOC flux supports this...
Tipo: Text
Palavras-chave: Authigenic uranium; Last glacial stage; Benguela Current upwelling.
Ano: 1999
URL: https://archimer.ifremer.fr/doc/00239/35071/34562.pdf

L'agrégation de thons de sub-surface au sein du système [DCP ancré - macronecton - environnement - pêche] en Martinique : étude hiérarchique par méthodes acoustiques, optiques et halieutiques
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Doray, Mathieu.
Artificial Fish Aggregating Devices (FADs) are known to concentrate tropical tunas. This aggregative behaviour drastically increases the vulnerability of these species to fishing. Alternatively, FADs can be used as oceanic observatories to study the aggregative behaviour of large pelagic fish. We conducted sea surveys in Martinique (Lesser Antilles) to i) establish a typology of the pelagic fish aggregations found around moored FADs ii) study their relations with their biotic and abiotic environment and the local fishery. The mean biomass of large pelagic fish aggregations was also estimated to provide scientific inputs to achieve a sustainable management of the moored FAD fishery. The first part presents the background of the study. We introduce the...
Tipo: Text
Palavras-chave: Martinique; Lesser Antilles; Hierarchy; Advection diffusion models; Geostatistics; Micronekton; Tuna/environment relationships; Aggregative behaviour; Tuna; Underwater video; Echosounding; FAD; Martinique; Petites Antilles; Hiérarchie; Modèles d'advection diffusion; Géostatistique; Micronecton; Relation thon/environnement; Comportement agrégatif; Thon; Vidéo sous marine; Acoustique; DCP.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/these-1735.pdf

Fiche synthèse campagne d'échantillonnage vidéo : Corne sud
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pelletier, Dominique; Roman, William; Loubersac, Lionel; Broutoi, Jean-marc; Carpentier, Liliane; Carpentier, Andre.
This survey was conducted in september 2013 within the AMBIO project in new Caledonia. The survey aims at assessing fish communities and associated habitats in the South Lagoon, part of the World Heritage.161 underwater unbaited rotating video observations, using the STAVIRO (158 stations) and the MICADO (3 stations) technique were validated, enabling to cover the entire zone (1290 km2).
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00274/38524/37035.pdf

Report of the Roundnose grenadier (Coryphaenoides rupestris) Otolith Exchange Scheme 2011
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mahe, Kelig; Elleboode, Romain; Øverbø Hansen, Hege; Román Marcote, Esther; Marull Hernández, Eva; Teruel Gómez, Josefina; Etherton, Mark.
The roundnose grenadier (Coryphaenoides rupestris) Otolith Exchange 2011 was a second one after the exchange of 2007. It was composed by 2 sets of otoliths from VIa(western Scotland ; n=64, the same as the exchange 2007 used one) sampled from January to June 2006 and otoliths from IIIa (Skagerrak ; n=63) sampled from January 2011. 6 readers participated from Spain (3 readers), UK England (1 reader), Norway (1 reader) and France (1 reader). Only images of otoliths sections were used during this exchange. The set of otoliths from VIa showed Coefficient of Variation of 14.9% and percent agreement to modal age of 29.3%. The set of otoliths from IIIa showed Coefficient of Variation of 22.6% and percent agreement to modal age of 30.7%. These results from both...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00063/17436/14942.pdf

Effects of Alexandrium minutum exposure upon physiological and hematological variables of diploid and triploid oysters, Crassostrea gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Haberkorn, Hansy; Lambert, Christophe; Le Goic, Nelly; Gueguen, Marielle; Moal, Jeanne; Palacios, Elena; Lassus, Patrick; Soudant, Philippe.
The effects of an artificial bloom of the toxin-producing dinoflagellate, Alexandrium minutum, upon physiological parameters of the Pacific oyster, Crassostrea gigas, were assessed. Diploid and triploid oysters were exposed to cultured A. minutum and compared to control diploid and triploid oysters fed T. Isochrysis. Experiments were repeated twice, in April and mid-May 2007, to investigate effects of maturation stage on oyster responses to A. minutum exposure. Oyster maturation stage, Paralytic Shellfish Toxin (PST) accumulation, as well as several digestive gland and hematological variables, were assessed at the ends of the exposures. In both experiments, triploid oysters accumulated more PSTs (approximately twice) than diploid oysters. Significant...
Tipo: Text
Palavras-chave: Oysters; Ploidy; Physiology; Harmful-algal bloom; Alexandrium minutum; PST accumulation.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00003/11378/7988.pdf

Ponte naturelle et ponte induite hormonalement chez dicentrarchus labrax L. en captivité
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boulineau, F.
From the aquaculture point of view, in any interesting species, one of the first issues raised is the obtaining of some fries for rearing. The first solution is the sampling of the ovums through abdominal pressure on mature females (the well-known technique used on salmonids). However, for basses, this method provides very few advantages for too many disadvantages; the first obstacle met is the determination of the fish's exact state of maturity in order to avoid a premature or late gamete release. This implies repeated handlings, really traumatizing for this type of fish. Moreover, it is inordinately rare, if not exceptional, to come across a wild female about to lay eggs. As a conclusion, this method results in the egg laying of a large number of...
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1973
URL: http://archimer.ifremer.fr/doc/1973/publication-5991.pdf

Erosions, dépots et transits sédimentaires associés dans le bassin de Marennes-Oléron
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Hir, Pierre; Kervella, Stephane; Walker, Patrice; Brenon, Isabelle.
Managing sediments in the bate de Marennes-Oleron (Atlantic coast of France) can be achieved providing particulate fluxes at the scale of the basin are available as well as tidal and meteorological conditions during which major transports occur A sediment dynamics model accounting for tide- and wave-induced sand and mud transport has been applied to the Pertuis Charentais area Consolidation of pure mud and mixtures of sand and mud is accounted for The model validation is achieved by current and turbidity measurements, local altimetric surveys during one year and pressure measurements for waves on the tidal flat An asymmetry between eastern and western halves of the bay is observed on turbidity signals in agreement with a residual circulation from north to...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00019/13034/10302.pdf

HYSCORES : Cartographies hyperspectrales appliquées aux écosystèmes coralliens et à leur état de santé.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ropert, Michel; Mouquet, Pascal; Bajjouk, Touria; Delacourt, Christophe.
En 2013, les résultats des travaux menés dans le cadre des projets "Spectrhabent-OI" (2009-2012), étendus au projet "Bioindication" (2012-2013) ont permis d'illustrer le potentiel important représenté par les nouvelles techniques d'imagerie aérienne hyperspectrale appliquées sur les plateformes récifales de l'île de La Réunion. L'objectif principal du projet HYSCORES (2015-2016) est de consolider ces premiers résultats dans une perspective de mise en œuvre opérationnelle de ces nouvelles méthodes dans le cadre de la DCE (directive-cadre européenne sur l’eau (2000/60/CE)). Pour cela 3 axes de recherche sont proposés : 1) l’étude et l'évaluation de la pertinence de l'indicateur VCH (vitalité corallienne hyperspectrale) proposé en 2012 ; 2) la capacité de...
Tipo: Text
Palavras-chave: Océan Indien; La Réunion; Récifs coralliens; Télédétection; Hyperspectral; Imagerie; Cartographie; Indicateur; Vitalité corallienne; Recouvrements; Algue; Corail; Sable; Herbier.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00350/46122/45820.pdf

GEOTRACES inter-calibration of the stable silicon isotope composition of dissolved silicic acid in seawater
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Grasse, Patricia; Brzezinski, Mark A.; Cardinal, Damien; De Souza, Gregory F.; Andersson, Per; Closset, Ivia; Cao, Zhimian; Dai, Minhan; Ehlert, Claudia; Estrade, Nicolas; Francois, Roger; Frank, Martin; Jiang, Guibin; Jones, Janice L.; Kooijman, Ellen; Liu, Qian; Lu, Dawei; Pahnke, Katharina; Ponzevera, Emmanuel; Schmitt, Melanie; Sun, Xiaole; Sutton, Jill; Thil, Francois; Weis, Dominique; Wetzel, Florian; Zhang, Anyu; Zhang, Jing; Zhang, Zhouling.
The first inter-calibration study of the stable silicon isotope composition of dissolved silicic acid in seawater, delta Si-30(OH)(4), is presented as a contribution to the international GEOTRACES program. Eleven laboratories from seven countries analyzed two seawater samples from the North Pacific subtropical gyre (Station ALOHA) collected at 300 m and at 1000 m water depth. Sampling depths were chosen to obtain samples with a relatively low (9 mmol L-1, 300 m) and a relatively high (113 mmol L-1, 1000 m) silicic acid concentration as sample preparation differs for low- and highconcentration samples. Data for the 1000 m water sample were not normally distributed so the median is used to represent the central tendency for the two samples. Median delta...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00381/49270/49681.pdf

Early diagenesis in the sediments of the Congo deep-sea fan dominated by massive terrigenous deposits: Part III – Sulfate- and methane- based microbial processes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pastor, Lucie; Toffin, Laurent; Decker, Carole; Olu, Karine; Cathalot, Cecile; Lesongeur, Francoise; Caprais, Jean-claude; Bessette, Sandrine; Brandily, Christophe; Taillefert, M.; Rabouille, C.
Geochemical profiles (SO42-, H2S, CH4, δ13CH4) and phylogenetic diversity of Archaea and Bacteria from two oceanographic cruises dedicated to the lobes sediments of the Congo deep-sea fan are presented in this paper. In this area, organic-rich turbidites reach 5000 m and allow the establishment of patchy cold-seep-like habitats including microbial mats, reduced sediments, and vesicomyid bivalves assemblages. These bivalves live in endosymbiosis with sulfur-oxidizing bacteria and use sulfides to perform chemosynthesis. In these habitats, unlike classical abyssal sediments, anoxic processes are dominant. Total oxygen uptake fluxes and methane fluxes measured with benthic chambers are in the same range as those of active cold-seep environments, and oxygen is...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00376/48767/49164.pdf

Wave Attenuation Through an Arctic Marginal Ice Zone on 12 October, 2015: 1. Measurement of Wave Spectra and Ice Features From Sentinel-1A
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Stopa, J. E.; Ardhuin, Fabrice; Thomson, Jim; Smith, Madison M.; Kohout, Alison; Doble, Martin; Wadhams, Peter.
A storm with significant wave heights exceeding 4 m occurred in the Beaufort Sea on 11 to 13 October, 2015. The waves and ice were captured on 12 October by the Synthetic Aperture Radar (SAR) on board Sentinel‐1A, with Interferometric Wide swath images covering 400 × 1100 km at 10 m resolution. This dataset allows the estimation of wave spectra across the marginal ice zone (MIZ) every 5 km, over 400 km of sea ice. Since ice attenuates waves with wavelengths shorter than 50 m in a few kilometers, the longer waves are clearly imaged by SAR in sea ice. Obtaining wave spectra from the image requires a careful estimation of the blurring effect produced by unresolved wavelengths in the azimuthal direction. Using in‐situ wave buoy measurements as reference, we...
Tipo: Text
Palavras-chave: Wave-ice interaction; Arctic Ocean marginal ice zone; Sentinel-1A SAR; Arctic Sea State Boundary Layer Physics Program; Remote sensing; Wave attenuation.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00439/55084/56519.pdf

Structure et évolution des fonds océaniques. La tectonique des plaques
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Pichon, Xavier.
L'exploration de la couverture sédimentaire des fonds océaniques n'a été possible d'une manière systématique que depuis 1960, lorsque les techniques de sismique réflexion continue furent introduites pour la première fois. L'absorption du son dans les sédiments étant d'autant plus grande que la fréquence est élevée, les procédés de sondage ultra-sonore classiques qui utilisent des fréquences de l'ordre de 12 kHz ne permettent pas des pénétrations supérieures à quelques mètres à l'intérieur des sédiments meubles.  Par contre, aux fréquences de l'ordre de 100 Hz, la pénétration de l'onde sonore est beaucoup plus grande et il devient possible d'effectuer un véritable sondage continu des couches sédimentaires consolidées. [OCR NON CONTRÔLE]
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1973
URL: http://archimer.ifremer.fr/doc/1973/publication-5022.pdf

Three-year study to assess human enteric viruses in shellfish
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Guyader, Soizick; Haugarreau, Larissa; Miossec, Laurence; Dubois, Eric; Pommepuy, Monique.
The main pathogenic enteric viruses able to persist in the environment, such as hepatitis A virus (HAV), Norwalk-like virus (NLV), enterovirus (EV), rotavirus (RV), and astrovirus (AV), were detected by reverse transcription-PCR and hybridization in shellfish during a 3-year study. Oyster samples (n = 108), occasionally containing bacteria, were less frequently contaminated, showing positivity for AV (17%), NLV (23%), EV (19%), and RV (27%), whereas mussel samples, collected in areas routinely impacted by human sewage, were more highly contaminated: AV (50%), HAV (13%), NLV (35%), EV (45%), and RV (52%). Sequences obtained from HAV and NLV amplicons shelved a great variety of strains, especially for NLV (strains close to Mexico, Snow Mountain Agent, or...
Tipo: Text
Palavras-chave: Molecular technique; Seasonal variation; Human pathology; Viral contamination; Shellfish; Enteric virus.
Ano: 2000
URL: https://archimer.ifremer.fr/doc/00507/61879/65953.pdf

Identification de la période la plus pertinente pour l'interdiction de 3 mois chaque année, de la pêche au chalut jusqu'à 6 milles marins de la côte en Corse (GSA 8)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Jadaud, Angelique; Billet, Norbert; Bourjea, Jerome; Certain, Gregoire; Biseau, Alain.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00585/69668/67536.pdf

How to genetically increase fillet yield in fish: Relevant genetic parameters and methods to predict genetic gain
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vandeputte, Marc; Fraslin, Clemence; Haffray, Pierrick; Bestin, Anastasia; Allal, Francois; Kocour, Martin; Prchal, Martin; Dupont-nivet, Mathilde.
Fillet yield (i.e. the proportion of edible muscle in a fish) is a key economic trait for species sold as fillets. Its genetic improvement is complicated by several of its characteristics 1) it is a ratio trait, 2) its numerator (fillet weight) and denominator (body weight) are strongly correlated (correlations in the range 0.89-0.99), 3) it offers little phenotypic variation and 4) it cannot be measured on alive breeding candidates. In a former study, we showed that it could be improved by selection, especially with three selection indices, fillet yield, residual fillet weight and a ratio-specific linear index. However, it is well known that the heritability of ratio traits does not permit a reliable prediction of genetic gains. As predictability of...
Tipo: Text
Palavras-chave: Aquaculture; Genetics; Heritability; Selection; Linear index; Residual fillet weight; Selection response; Simulation; Processing yields.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00612/72378/71390.pdf

Reproduction de l'huître creuse dans le Bassin d'Arcachon Année 2015
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Maurer, Daniele; Auby, Isabelle; Hanrio, Eliot; Terrones, Hippolyte; Rigouin, Loic; Meteigner, Claire; Rumebe, Myriam; D'Amico, Florence; Tournaire, Marie-pierre; Ganthy, Florian; Trut, Gilles; Navarro, Romuald; Simonnet, Bastien; Mayer, Nicolas.
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00343/45450/44991.pdf

Evolution des conditions d'affinage de l'huître creuse Crassostrea gigas en claires ostréicoles (Marennes-Oléron)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Deguil, Cyril.
C'est au sein du L.C.P.C., Laboratoire Conchylicole de Poitou-Charentes que s'est déroulé mon stage. Le souhait du syndicat régional conchylicole de Marennes-oléron est de voir évoluer la norme d'élevage "fine" et "spéciale de claire". L'idée est d'arriver vers une gestion plus saisonnière en densité et longueur d'élevage. Dans cet objectif, le laboratoire a réalisé 2 séries expérimentales avec 2 périodes représentatives du changement souhaité. Le but de cette comparaison est de constater s'il existe une différence entre les méthodes actuellement en place et leur possible évolution. Pour cette étude d'élevage, le laboratoire possède les outils appropriés : 4 claires, une salle de biochimie avec spectrophotomètre et les micro-ordinateurs nécessaires à...
Tipo: Text
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00412/52368/53161.pdf

Etude écologique de projet. Site de Gravelines. 2è cycle. Volume 1: Rapport final. Volume 2 : Annexes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Arnal, Olivier; Bougard, M; Delatre, Jm; Dewarumez, N; Jospin, Jp; Labbe, A; Le Fevre-lehoerff, G; Menu, D; Nicoulaud, F; Pauchet, Mc; Quintin, Jean-yves; Souplet, Arnauld; Toularastel, France; Romana, Louis-alexandre; Laubier, Lucien; Chardy, Pierre.
Les études écologiques sur le site d'une future centrale nucléaire se divisent en plusieurs parties :  - étude d'avant-projet : étude rapide permettant d'évaluer les caractéristiques écologiques générales et la richesse du site. Sur le site de Gravelines, cette étude a été effectuée de Juillet à Décembre 1973, - étude de projet : destinée à établir un bilan écologique avant la mise en service des installations cette étude porte sur deux cycles annuels, - étude de Surveillance : s'étendant sur plusieurs années; cette étude permet, d'une part, d'apprécier les variations pluriannuelles des écosystèmes d'autre part, de rechercher les effets des rejets d'eau réchauffée sur ces écosystèmes.
Tipo: Text
Ano: 1977
URL: http://archimer.ifremer.fr/doc/00006/11736/8410.pdf

Contribution à l'étude d'impact des eaux de rejet agricoles vers le milieu marin conchylicole en Charente Maritime
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Masson, Daniel; Dubernet, Jean-françois; Dupin, Veronique; Aubry, Fanny; Mechin, Brigitte; Delest, Brigitte.
Les marais agricoles de Charente-Maritime sont le siège de culture intensives sur drainage depuis les années 1980. Les eaux de drainage aboutissent souvent dans les marais salés contigus, notamment utilisés pour l'affinage de huîtres. Une évaluation de l'impact de cette activité a été menée sur trois ans en utilisant trois types de tests écotoxicologiques en support à un suivi analytique des eaux de rejet : tests acétylcholinestérase (effet des insecticides), test larves d'huîtres (impact sur l'écosystème), test d'inhibition phytoplanctonique (effet des herbicides).
Tipo: Text
Palavras-chave: Impact rejets; Conchyliculture; Marais agricoles; Marais salé; Marais doux.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/acte-3965.pdf

Comparaison de la filtration entre une population de Crassostrea angulata Lmk et une population de Crassostrea gigas Thunberg élevées dans le bassin d'Arcachon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: His, Edouard.
L'introduction d'une nouvelle espèce en ostréiculture donne souvent lieu à des débats passionnés dans les milieux ostréicoles. Un exemple est donné par Charles Martin, parqueur du Bassin d'Arcachon, dans son ouvrage "Agriculteur de la mer"; il rapporte les mesures restrictives qu'avait entraînées l'introduction de l'huître portugaise à Arcachon au début du 20ème siècle. Un des arguments avancés pour expliquer les réticences était celui de la "concurrence vitale" et de la compétition sur le plan nutritionnel (filtration) entre C. angulata et Ostrea edulis: cette dernière espèce était alors seule exploitée dans le bassin. Il fallut attendre l'épizootie de 1920, qui anéantit presque totalement l'huître plate, pour que la portugaise soit définitivement admise.
Tipo: Text
Palavras-chave: Ostréiculture; Crassostrea gigas; Crassostrea angulata; Filtration; Bassin Arcachon; Gironde.
Ano: 1970
URL: http://archimer.ifremer.fr/doc/00009/11978/8682.pdf

Contrasting selective patterns across the segmented genome of bluetongue virus in a global reassortment hotspot
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Jacquot, Maude; Rao, Pavuluri P.; Yadav, Sarita; Nomikou, Kyriaki; Maan, Sushila; Jyothi, Y. Krishna; Reddy, Narasimha; Putty, Kalyani; Hemadri, Divakar; Singh, Karam P.; Maan, Narender Singh; Hegde, Nagendra R.; Mertens, Peter; Biek, Roman.
For segmented viruses, rapid genomic and phenotypic changes can occur through the process of reassortment, whereby co-infecting strains exchange entire segments creating novel progeny virus genotypes. However, for many viruses with segmented genomes, this process and its effect on transmission dynamics remain poorly understood. Here, we assessed the consequences of reassortment for selection on viral diversity through time using bluetongue virus (BTV), a segmented arbovirus that is the causative agent of a major disease of ruminants. We analysed ninety-two BTV genomes isolated across four decades from India, where BTV diversity, and thus opportunities for reassortment, are among the highest in the world. Our results point to frequent reassortment and...
Tipo: Text
Palavras-chave: Bluetongue virus; Evolution; Reassortment; India; Selection.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00667/77882/80042.pdf

Variete des environements geologiques et relations avec les depots ferromanganesiferes de l'ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Suave, R; Hoffert, M; Pautot, G.
During the world tour of R/V Jean Charcot , 2 types of polymetalic deposits have been investigated: the cobalt-rich crusts in the Tuamotu Archipelago (French Polynesia) and the manganese nodules in the Clarion-Clipperton Fracture Zone. In the South Pacific Ocean, a genetic model of site bearing cobalt-rich crusts has been identified: the polymetallic deposits are located at a 1,000 m water depth on a subsident fossil atoll built on a volcanic substrate. In the North Pacific Ocean, a 2 months cruise has been conducted on the basis of preexisting data (seabeam, bottom photographs, nodules and sediment sampling). Three types of geological environment have been characterized: a sedimentary plateau, an area particularly representative of the abyssals hills...
Tipo: Text
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00268/37941/36022.pdf

A novel proteomic approach identifies new interaction partners for proliferating cell nuclear antigen
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mesiet Cladiere, L; Norais, Cédric; Kuhn, Joelle; Briffotaux, Julien; Sloostra, Jerry W.; Ferrari, Elena; Hubscher, Ulrich; Flament, Didier; Myllykallio, Hannu.
During DNA replication and repair, many proteins bind to and dissociate in a highly specific and ordered manner from proliferating cell nuclear antigen (PCNA). We describe a combined approach of in silico searches at the genome level and combinatorial peptide synthesis to investigate the binding properties of hundreds of short PCNA-interacting peptides (PIP-peptides) to archaeal and eukaryal PCNAs. Biological relevance of our combined approach was demonstrated by identification an inactive complex of Pyrococcus abyssi ribonuclease HII with PCNA. Furthermore we show that PIP-peptides interact with PCNA largely in a sequence independent manner. Our experimental approach also identified many so far unidentified PCNA interacting peptides in a number of human...
Tipo: Text
Palavras-chave: Ribonuclease HII; Combinatorial peptide synthesis; PCNA.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3297.pdf

Suivi stationnel (2006-2018) des herbiers de zostères (Zostera noltei et Zostera marina) et calcul de l’indicateur DCE « Angiospermes » (2018) dans la masse d'eau côtière FRFC06 – Arcachon amont - Bassin Hydrographique Adour- Garonne
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Auby, Isabelle; Rigouin, Loic; Oger-jeanneret, Helene; Ganthy, Florian; Trut, Gilles; Trut, Florence; D'Amico, Florence; Meteigner, Claire; Aubert, Fabien; Bujan, Stéphane; Gouillieux, Benoit; Dalloyau, Sébastien; Pere, Caroline.
Le calcul de l’indicateur angiospermes dans la masse d’eau FRFC06 – Arcachon amont est basé sur le suivi de trois métriques (composition, extension, abondance) des deux espèces de zostères présentes dans la Baie : Zostera noltei et Zostera marina. Les résultats obtenus jusqu’en 2018 permettent d’affecter une qualité « moyenne » à cette masse d’eau vis-à-vis de cet indicateur, qui est, pour l’instant la seule à ne pas s’avérer en bon ou très bon état sur le littoral Manche-Atlantique français. Ce mauvais classement s’explique principalement par le fait que les emprises des deux espèces sont actuellement beaucoup plus faibles que celles, historiques, utilisées comme référence.
Tipo: Text
Palavras-chave: Bassin d’Arcachon; Herbiers de zostères; Directive Cadre sur l’Eau (DCE).
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00511/62265/66468.pdf

Étude de matière humique sédimentaire par application de la technique de pyrolyse-chromatographie liquide-chromatographie gazeuse
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Noureddin, S; Vandenbroucke, M; Courtot, P.
Preparative pyrolysis followed by liquid chromatographic separation and gas chromatography of hydrocarbons (Pyrolysis-LC-GC) were used to study the participation of terrestrial and/or aquatic compounds in the formation of humic substances in sediments. Analyses performed on humic substances from recent sediments sampled in the Elorn river estuary (France) show that these substances are similar in many respects to other lacustrine or marine humic substances, with regard, for instance, to their high nitrogen and sulphur content and their low aromaticity. Mass balances on pyrolysis products and group composition of the C-14+ fraction of the pyrolysates were performed. The distribution of the total alkane and alkene fraction, isocyclo alkanes and alkenes from...
Tipo: Text
Palavras-chave: HUMIC SUBSTANCES; PYROLYSIS-LC-GC; RECENT ESTUARINE SEDIMENTS; ORIGIN OF HUMIC MATTER.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00099/21029/18655.pdf

Marine protected areas and artificial reefs: A review of the interactions between management and scientific studies
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Claudet, Joachim; Pelletier, Dominique.
Inshore marine areas host key habitats for the biological cycle of many marine populations, but are subject to strong anthropogenic pressure. Uses of inshore areas are multiple and often give rise to conflicting interests. In this context. marine protected areas (MPAs) and artificial reefs (ARs) are increasingly regarded as interesting management measures, in that they contribute to ecosystem conservation, fisheries sustainability, and because they can be helpful in zoning coastal areas in order to reduce conflicts between users. Beyond these expected benefits, it is important to appraise whether MPAs and ARs meet managers' objectives. This review focuses on the interaction between ecological sciences and management in the purpose of establishing or...
Tipo: Text
Palavras-chave: Monitoring; Management actions objectives; Management; Impact assessment; Fish; Artificial reefs; Marine protected areas.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-397.pdf

Etude des mortalités ostréicoles de l'hiver 1998/1999 en Baie des Veys. Caractérisation et analyse temporelle des dessalures observées sur les parcs conchylicoles de la baie de Veys depuis 1996.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ropert, Michel; Kopp, Joel.
The Shellfish Laboratory of Normandy (LCN : Laboratoire Conchylicole de Normandie) observed unusual hydrologic anomalies associated with important oyster mortalities during the winter of 1999. These anomalies were described as sudden salinity variations during the lidal cycle, particularly on the rising tide. Starting in 1996 a multi-parameter probe was used to monitor salinity, temperature and depth every 10 to 20 minutes in the inter-tidal zone. Alter data processing and filtering, two criteria concerning low salinity were chosen : amplitude and duration. Application of a cumulative function (Ibanez et al., 1993) to this time series data treatment showed the 3 year trend (1996-1999). Salinity variation data and climatic data were used in a multivariate...
Tipo: Text
Palavras-chave: Crassostrea gigas; Mortalités; Salinité; Baie des Veys; Suivi; Crassostrea gigas; Mortality; Salinity; Baie of Veys; Monitoring.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00102/21310/18928.pdf

Sur un genre nouveau de monogenoidea parasite de la dorade chrysophrys aurata L.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Euzet, Louis; Audouin, Jacques.
We believe that this parasite, despite the presence of just one squamodisc, belongs to family Dactylogyridae, subfamily Diplectanidae. This subfamily is defined as follows: Dactylogyridae possessing haptor with 14 marginal hooks and two pairs of large J-shaped anchors joined by two, three or five transverse bars. Sclerotised accessory organs (squamodiscs) on the body anterior to the haptor. Testis. Vagina observed. This subfamily currently comprises eight genera that all have two squamodiscs, one dorsal and one ventral, anterior to the haptor....
Tipo: Text
Ano: 1959
URL: http://archimer.ifremer.fr/doc/1959/publication-4498.pdf

Molecular approach indicates consumption of jellyfish by commercially important fish species in a coastal Mediterranean lagoon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Marques, Raquel; Darnaude, Audrey M.; Crochemore, Sandrine; Bouvier, Corinne; Bonnet, Delphine.
Until recently, jellyfish have been ignored as an important source of food, due to their low nutritional value. Here, quantitative PCR was used to detect and quantify the DNA of the jellyfish Aurelia coerulea in the gut contents of commercially important fish species from the Thau Lagoon. Individuals from five fish species were collected during two different periods: the bloom period, when the pelagic stages of A. coerulea are abundant, and the post-bloom period, when only the benthic stage – polyps – is present in the lagoon. The DNA of A. coerulea was detected in the guts of 41.9% of the fish analysed, belonging to four different species. The eel Anguilla anguilla and the seabream Sparus aurata were important jellyfish consumers during the bloom and...
Tipo: Text
Palavras-chave: Predation; Aurelia coerulea; Eel; Seabream; Polyps; Medusae; Quantitative PCR; Gut content; Thau lagoon.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00513/62469/66986.pdf

Étude géologique pour l'implantation de récifs artificiels en Languedoc-Roussillon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Augris, Claude; Mear, Yan.
Un programme pilote d'aménagement des fonds marins littoraux par récifs artificiels est mené sur le plateau continental du Languedoc-Roussillon.  A la demande de l'I.F.R.E.M.E.R., une cartographie des formations superficielles par sonar latéral et une identification des sédiments par prélèvements à la benne ont été réalisés au cours de deux missions à la mer.  Après avoir exposé les techniques d'exploration, nous présenterons les grands traits sédimentaires des zones d'immersion situés au large de St. Cyprien et de Canet. Pour chacune d'elles, nous situons l'emplacement des concessions et, à partir de deux documents cartographiques, nous en discuterons les qualités de valorisation.  Par la suite, des propositions sont faites pour un suivi scientifique des...
Tipo: Text
Ano: 1985
URL: http://archimer.ifremer.fr/doc/00110/22151/19793.pdf

Reviewing of initiatives and approaches for strengthening the competitiveness of fisheries and aquaculture
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Daures, Fabienne; Girard, Sophie.
The D3.4 aimed to explore the room for improving competitiveness at the production stage. Based on challenges and bottlenecks initially identified for each of the case studies covered by the SUCCESS project, the report reviews and analyses initiatives taken by producers to improve their competitiveness and sustainability. Some challenges are common to both fisheries and aquaculture sectors; others are more specific. In total, the description and results from 18 initiatives (10 in fisheries and 8 in aquaculture) are presented and there is at least one initiative per case study. Initiatives have been classified by category: New products (2), New production technique/mode (2), Institutional changes (3), Management/ spatial tools (2), Labelling and...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00486/59719/62817.pdf

Correlation between detection of a plasmid and high-level virulence of Vibrio nigripulchritudo, a pathogen of the shrimp Litopenaeus stylirostris
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Reynaud, Yann; Saulnier, Denis; Mazel, D; Goarant, Cyrille; Le Roux, F.
Vibrio nigripulchritudo, the etiological agent of Litopenaeus stylirostris summer syndrome, is responsible for mass mortalities of shrimp in New Caledonia. Epidemiological studies led to the suggestion that this disease is caused by an emergent group of pathogenic strains. Genomic subtractive hybridization was carried out between two isolates exhibiting low and high virulence. Our subtraction library was constituted of 521 specific fragments; 55 of these were detected in all virulent isolates from our collection (n = 32), and 13 were detected only in the isolates demonstrating the highest pathogenicity (n = 19), suggesting that they could be used as genetic markers for high virulence capacity. Interestingly, 10 of these markers are carried by a replicon of...
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4523.pdf

The spectre of uncertainty in management of exploited fish stocks: The illustrative case of Atlantic bluefin tuna
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fromentin, Jean-marc; Bonhommeau, Sylvain; Arrizabalaga, Haritz; Kell, Laurence T.
The recent overexploitation of East Atlantic and Mediterranean bluefin tuna stock has been well documented in the media where it has become the archetype of overfishing and general mis-management. Beyond the public debate, the crisis also highlighted how the interactions between science and management can change through time according to the awareness of the public opinion. To reflect these issues, the history of Atlantic bluefin tuna overfishing is first described. Then, the major uncertainties that undermine the current scientific advice are summarized and the importance of reducing their impacts by improving knowledge and developing robust scientific framework is considered. The study also discusses how uncertainty was used by different lobbies to...
Tipo: Text
Palavras-chave: Overexploitation; Rebuilding; Uncertainty; Management; Scientific diagnosis; Tuna.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00177/28776/27302.pdf

Suivi stationnel de l’herbier à Zostera noltei de la masse d’eau FRFT8 Bidassoa – 2017. Bassin Hydrographique Adour-Garonne
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sanchez, Florence; Lissardy, Muriel; De Casamajor, Marie-noelle.
The assessment of the angiosperm quality element (Zostera noltei) for transitional water body (here, FRFT8 Bidassoa) considers the monitoring of 3 metrics: the taxinomic composition, the spatial bed extent and the abundance (percentage cover). In 2017, the angiosperm quality element for FRFT8 Bidassoa was “good” as in 2015 and 2016. This result is due to a better percentage of seagrass cover. However, the spatial extent of seagrass continuously change, with new colonized areas.
Tipo: Text
Palavras-chave: Directive Cadre sur l’eau; Herbier Zostera noltei; Côte basque; Baie de Txingudi; Hendaye.; Water Framework Directive; Seagrass bed Zostera noltei; Basque coast; Txingudi Bay; Hendaye.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00428/53973/55126.pdf

Impact des facteurs environnementaux et des pratiques conchylicoles sur la baie du Mont Saint-Michel et la production conchylicole. Etude de scenarii par modélisation. Programme Liteau 3. Rapport Final
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cugier, Philippe; Frangoudes, Katia; Blanchard, Michel; Mongruel, Remi; Perez, Jose; Le Mao, Patrick; Robin, T.; Fontenelle, Guy; Mazurie, Joseph; Cayocca, Florence; Pouvreau, Stephane; Olivier, F.
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00026/13707/10862.pdf

Utilisation des minéraux sédimentaires argileux pour la reconstitution des variations paléoclimatiques à court terme en Mer d'Arabie
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fagel, N; Debrabant, P; Demenocal, P; Demoulin, B.
During the Late Neogene, the sediments of the Owen ridge (Arabian Sea) were able to record paleoclimatic variations because of tectonic stability and weak bio-turbation. These changes had a powerful influence on the western, northern and northeastern detrital supplies related to monsoon conditions and low-latitude aridity which developed during glaciary stages. In ODP Leg 117 sites, previous studies on the distribution of clay assemblages show a great variety of mineral origins and their fluctuating contribution to the Neogene sedimentation. Concurrent investigations of the sedimentological, magnetic, biogenic and geochemical properties of sediments have emphasized typical periodic sedimentary responses related to external forced functions of the earth's...
Tipo: Text
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00100/21146/18765.pdf

Suivi stationnel des herbiers de zostères (Zostera noltei et Zostera marina) de la Masse d'eau côtière FRFC06 – Arcachon amont - - Bassin Hydrographique Adour-Garonne - 2006-2012
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Auby, Isabelle; Trut, Gilles; Rigouin, Loic; Oger-jeanneret, Helene; D'Amico, Florence; Duval, Magali; Gouriou, Laure; Rumebe, Myriam; Plus, Martin; Bujan, Stephane.
La Directive Cadre sur l’Eau 2000/60/CE établit un nouveau cadre pour une politique communautaire dans le domaine de l’eau. Elle fixe comme objectif général d’atteindre, à l’horizon 2015, un bon état écologique et chimique des masses d’eau souterraines et de surface, ces dernières incluant les eaux côtières (MEC) et les eaux de transition (MET). Dans ce cadre, un certain nombre d'éléments de qualité sont suivis, dont l'élément de qualité "Angiospermes" dans les masses d'eau où les herbiers de zostères sont présents. Ce rapport contient les résultats du suivi mis en oeuvre depuis 2006 pour cet élément de qualité dans la masse d'eau "Arcachon amont".
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00146/25695/23767.pdf

Variability of the turbulent kinetic energy dissipation along the A25 Greenland-Portugal transect repeated from 2002 to 2012.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ferron, Bruno; Kokoszka, Florian; Mercier, Herle; Lherminier, Pascale; Huck, Thierry; Rios, Aida; Thierry, Virginie.
The variability of the turbulent kinetic energy dissipation due to internal waves is quantified using a finescale parameterisation applied to the A25 Greenland-Portugal transect repeated every two years from 2002 to 2012. The internal wave velocity shear and strain are estimated for each cruise at 91 stations from full depth vertical profiles of density and velocity. The 2002–2012 averaged dissipation rate, &lt;ε2002–2012&gt;, in the upper ocean lies in the range 1–10 × 10-10 W kg-1. At depth, &lt;ε2002–2012&gt; is smaller than 1 × 10-10 W kg-1 except over rough topography found at the continental slopes, the Reykjanes Ridge and in a region delimited by the Azores-Biscay Rise and Eriador Seamount. There, the vertical energy flux of internal waves is...
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00333/44463/44141.pdf

Remarques sur les rides sous-marines : théorie de la formation des rides
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Berthois, Léopold.
Numerous laboratory studies have been done on the formation and on the evolution of sand ridges. Durand (1951) studied the formation of ridges in channels. He showed that when a sand grain from the transport layer in direct contact with the bottom comes to rest, it has a tendency to stop all the other particles coming from upstream at the same level. The upper layers are slowed in succession and it is as if an additional layer had been added, with this layer being made up of particles taken from the permanent sediment discharge of higher regions in saltation....
Tipo: Text
Ano: 1959
URL: http://archimer.ifremer.fr/doc/1959/publication-4492.pdf

Activité des navires de pêche 2017 : quartier maritime Marennes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: SIH. Système d'Informations Halieutiques de l'Ifremer.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public.
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00490/60155/63499.pdf

Late quaternary paleoceanography of the French Guiana continental shelf: Clay-mineral evidence
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pujos, M; Latouche, C; Maillet, N.
Marine muds deposited on the French Guiana coast mostly originate in the Amazon. Recent sediments are composed of (a) illite (33 %) and chlorite (13 %) of Andean mountain origin; and (b) kaolinite (28 %) and smectite (26 %), principally from the Amazonian lowlands but also from the Guiana Shield. In the coastal mud prism, high-resolution seismic profiles, together with sedimentological, micropaleontological and soil engineering studies, supplemented by C-14 dates, permitted a stratigraphic interpretation of eight cores. Three episodes have been determined on the basis of clay-mineral variations related to Amazonian lowland, Andean and Guiana shield sources. The older episodes 3 (3000-1700 y BP) and 2 (1700-1000 y BP) are predominantly characterized by...
Tipo: Text
Palavras-chave: Late quaternary; French Guiana; Shelf; Clay minerals; ENSO.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00094/20506/18175.pdf

On the use of time frequency domains for the improvement of the stochastic matched filter pulse compression scheme with a high speed computing architecture
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00051/16175/13661.pdf

CAISSON 1000 BARS. Compte-rendu de maintenance et de dépannage sur le caisson 1000 bars pour l’année 2017
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Martin, Christophe.
Maintenir en état le caisson 1000 bars, son système de mise en pression et la centrale de filtration des huiles, afin que celui-ci soit en mesure d’assurer les essais demandés.
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00442/55379/56897.pdf

In situ distribution and characterization of the organic content of the oyster shell Crassostrea gigas (Mollusca, Bivalvia)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dauphin, Yannicke; Ball, Alexander D.; Castillo-michel, Hiram; Chevallard, Corinne; Cuif, Jean-pierre; Farre, Bastien; Pouvreau, Stephane; Salome, Murielle.
Cultivation of commercial oysters is now facing the possible influence of global change in sea water composition, commonly referred to as "ocean acidification". In order to test the potential consequence of the predicted environmental changes, a cultivation experiment was carried out. The left and right valves of the oyster shell Crassostrea gigas differ in their structure; moreover, lenses of non compact layers are irregular. The shell layers of juvenile C. gigas are studied using a variety of highly spatially resolved techniques to establish their composition and structure. Our results confirm the presence of three different calcitic structural types. The role of the lenses of chalky layers is not yet deciplered. Despite a common mineralogy, the...
Tipo: Text
Palavras-chave: Biomineral; Mollusc shell; Infrared spectroscopy; Laser confocal Microscope; Micro-XANES.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00118/22890/20797.pdf

Etude des interactions métaux - matière organique à l'interface eau - particules
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Courtot, J.
De nombreuses raisons expliquent l'importance croissante accordée au comportement biogéochimique des éléments traces dans les estuaires. En effet, les estuaires, zones de transition inévitables entre les fleuves et l'océan, sont le siège d'interactions et de réactions d'une grande diversité provoquées par de fortes variations de facteurs physicochimiques, hydrodynamiques, sédimentologiques, biologiques et climatiques. Mais, les sites estuariens sont généralement soumis à de multiples exploitations de la part de l'homme et ils deviennent souvent le réceptacle des résidus des nombreuses activités localisées le long des rivières et des côtes (rejets urbains~agricoles et industriels). Or, dans un domaine estuarien, la production primaire est favorisée par les...
Tipo: Text
Ano: 1987
URL: http://archimer.ifremer.fr/doc/00140/25118/23227.pdf

A possible link between gabbros bearing high temperature iddingsite alteration and huge pegmatoid intrusions: The Society Islands, French Polynesia
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Clement, Jean-philippe; Caroff, Martial; Dudoignon, Patrick; Launeau, Patrick; Bohn, Marcel; Cotten, Joseph; Blais, Sylvain; Guille, Gérard.
This paper reports new field observations and new petrological, textural and geochemical data on two gabbroic intrusions and one pegmatoid dyke from the French Polynesian islands Maupiti and Bora Bora, respectively. Olivine crystals from the Faataufi and Barque de Hiro gabbros (Maupiti) include High Temperature Iddingsite (HTI), exhibiting three distinct morphological facies. Chemical and crystallographical data performed by electron microprobe, scanning microscope, X-ray diffractometry and Near InfraRed spectroscopy show that HTI results from modifications of olivine structure through intense hydroxylation and Fe-oxidation. The HTI-free 120 m-wide Cloche de Hiro dyke (Bora Bora) exhibits a textural zonation from heterogranular/intergranular gabbro...
Tipo: Text
Palavras-chave: Society Islands; French Polynesia; Pegmatoid; Vapor differentiation; Olivine; Gabbros.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2999.pdf

Etude histoensymologique de la digestion chez Ruditapes philippinarum
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hily, A.
Examinations of alimentary tract and digestive tubules after feeding give evidence of continuous digestive process in juveniles of Ruditapes philippinarum . Histoenzymologic study of digestive tract suggests important intracellular enzymatic activities in stomacal epithelium, digestive gland and intestinal cells. Main part of intracellular digestion occurred in digestive cells by lysosyme associated with vacuolar system.
Tipo: Text
Palavras-chave: Ruditapes philippinarum; Bivalvia; Digestive system; Enzymatic activity; Histology; Digestive glands; Digestion; Enzymes digestives; Digestion; Bivalve.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1180.pdf

Modélisation de l'écosystème du bassin de Marennes-Oléron
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bacher, Cedric; Menesguen, Alain; Raillard, Olivier; Heral, Maurice; Deslous-paoli, Jean-marc; Razet, Daniel.
Une approche analytique permet de coupler un modèle physique avec un modèle biologique qui prédit la croissance des huîtres en fonction de la quantité, de la qualité de la nourriture particulaire et de la température. Ce modèle montre clairement l'effet de surcharge du bassin induisant un ralentissement des performances de croissance avec un gradient marqué du nord au sud. Un modèle phytoplanctonique basé sur les apports respectifs en nitrates de la Charente et de l'océan permet de prédire la production primaire en fonction de la température et de la transparence de l'eau. Une simulation supprimant les apports de la Charente permet de préciser la quantité de phytoplancton dépendant de ces apports. Un troisième modè le s'applique à représenter dans une...
Tipo: Text
Palavras-chave: Modèle de croissance huîtres; Modèle phytoplanctonique; Remise en suspension; Marennes-Oléron.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00439/55045/56481.pdf

MEDAR/MEDATLAS 2002: A Mediterranean and Black Sea database for operational oceanography Elsevier Oceanography Series
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fichaut, Michele; Garcia, Maria-jesus; Giorgetti, Alessandra; Iona, Athanasia; Kuznetsov, Alexander; Rixen, Michel; Medar Group,.
A comprehensive database of temperature, salinity and bio-chemical parameters in the Mediterranean and Black Sea has been constructed through comprehensive co-operation between the bordering countries. Statistical climatologies have been computed with all assembled and quality controlled data. The database, designed to initiate and validate prediction models, also represents a system to quality-check new incoming data produced by ocean observing systems.
Tipo: Text
Palavras-chave: Database; Temperature; Salinity; Nutrients; Climatology; Quality control.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00351/46177/45876.pdf

Région Normandie. 2018. Activité des navires de pêche.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d’Informations Halieutiques » (SIH) de l’Ifremer, qui constitue le réseau d’observation des ressources halieutiques et des usages associés. Ce projet s’inscrit dans la mission de service d’intérêt public de l’Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l’analyse du secteur des pêches, le SIH a en charge l’élaboration d’indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche et du grand public.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00608/72056/70760.pdf

Simulation of tides, residual flow and energy budget in the Gulf of California
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Carbajal, N; Backhaus, Jo.
With the application of a two-dimensional nonlinear hydrodynamical-numerical semi-implicit model, the principal tides M(2), S(2), K(2), N(2), K(1), P(1) and O(1) were studied. Energy budgets of the semi-diurnal M(2) and S(2) were calculated separately. The linear sum of these budgets was compared with the tidal energy budget obtained when these two tidal constituents interact. Since a quadratic form for the bottom friction was used, remarkable differences were found. The results show that in the area of the Colorado River delta, the dissipation of tidal energy is very strong. Intense tidal currents were observed in the same region and over the Salsipuedes Sill. Energy budgets calculated for forcing waves of different periods, but of the same amplitude,...
Tipo: Text
Palavras-chave: Modèle numérique; Marée; Courant résiduel; Bilan énergétique; Seiche; Numerical modelling; Tide; Residual flow; Energy budget; Seiche.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00325/43666/43204.pdf

Depletion of Essential Fatty Acids in the Food Source Affects Aerobic Capacities of the Golden Grey Mullet Liza aurata in a Warming Seawater Context
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vagner, Marie; Lacoue-labarthe, Thomas; Infante, Jose-luis Zambonino; Mazurais, David; Dubillot, Emmanuel; Le Delliou, Herve; Quazuguel, Patrick; Lefrancois, Christel.
The objective of this study was to evaluate the combined effects of thermal acclimation and n-3 highly unsaturated fatty acids (n-3 HUFA) content of the food source on the aerobic capacities of fish in a thermal changing environment. The model used was the golden grey mullet Liza aurata, a species of high ecological importance in temperate coastal areas. For four months, fish were exposed to two food sources with contrasting n-3 HUFA contents (4.8% ecosapentaenoic acid EPA + docosahexaenoic acid DHA on the dry matter DM basis vs. 0.2% EPA+DHA on DM) combined with two acclimation temperatures (12 degrees C vs. 20 degrees C). The four experimental conditions were LH12, LH20, HH12 and HH20. Each group was then submitted to a thermal challenge consisting of...
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00274/38479/36939.pdf

Computing inventories of anthropogenic CO2 in the eastern subpolar North Atlantic using OVIDE data
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Zunino Rodriguez, Patricia; Perez, Fiz F.; Lherminier, Pascale; Mercier, Herle.
The highest anthropogenic CO2 (Cant) inventories of all the oceans are found in the subpolar North Atlantic (SPNA). The OVIDE section crosses the SPNA from Greenland to Portugal and is repeated biennially since 2002. Therefore, OVIDE data allow evaluating the evolution of inventories of anthropogenic CO2 (Cant) in the SPNA. This oceanic region is known to host water formation and ventilation processes that change the water mass volumetric census year by year. Changes in the volumetric census cause differences in the Cant inventory estimates (Pérez et al., 2008). Consequently, Pérez et al. (2010) proposed a method for computing Cant inventory in the SPNA taking into account the volumetric census variability and a bathymetric adjustment. This method has been...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00270/38170/36314.pdf

New hypotheses concerning the earliest brachyurans (Crustacea, Decapoda, Brachyura)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guinot, Daniele.
All Jurassic brachyuran taxa known to date are based solely upon dorsal carapaces, and only a limited number of Early and mid-Cretaceous crabs retain ventral parts. Therefore, all Jurassic taxa and many forms from the first half of the Cretaceous are carapace-based entities. All of them are considered to be "dromiaceans", podotremes to be precise. The recent discovery of an exceptionally well-preserved male crab from the Upper Cretaceous (lower Cenomanian) of Chiapas (Mexico), Archaeochiapasa tnairioqueoi Guinot, Carbot-Chanona &amp; Vega, 2019, at first sight of a podotreme nature, has allowed a detailed description of its thoracic sternum and pleon, which revealed that it was actually a typical eubrachyuran, in need of a new family, Archaeochiapasidae...
Tipo: Text
Palavras-chave: Upper Jurassic; Cretaceous; Prosopidae; Lecythocaridae; Bucculentidae; Nodoprosopidae; Glaessneropsidae; Viaiidae; Homolodromioidea; Homoloidea; Glaessneropsoidea; Goniodromitinac; Sphaerodromiinae; Eubrachyura; Callichimacroida; Podotreme; New classification.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00659/77084/78427.pdf

Report of the Eighth Workshop on the Development of Quantitative Assessment Methodologies based on LIFE-history traits, exploitation characteristics, and other relevant parameters for data-limited stocks (WKLIFE VIII), 8–12 October 2018 Lisbon, Portugal
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ICES.
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00472/58384/60949.pdf

41st Plenary meeting report of the Scientific, Technical and Economic Committee for Fisheries (PLEN-12-03). Plenary meeting, 5-9 November 2012, Brussels
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: STECF.
The Scientific, Technical and Economic Committee for Fisheries hold its 41st plenary on 5-9 November 2012 in Brussels (Belgium). The terms of reference included both issues assessments of STECF Expert Working Group reports and additional requests submitted to the STECF by the Commission. Topics dealt were inter alia assessments of Mediterranean and Black Sea stocks, evaluations of fishing effort regimes, technical measures, review of scientific advice on stocks and fisheries of EU interest, fisheries management plans evaluation issues.
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00124/23492/21322.pdf

Experimental investigation of the large scale flow structures around a trawl
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bouhoubeiny, Elkhadim; Germain, Gregory; Druault, Philippe.
Flow field measurements behind a rigid cod-end and a moving bottom trawl are conducted using Time Resolved PIV method. This method is based on an image acquisition rate allowing the time resolved sampling of the vortex shedding phenomenon. Based on such measurements, the main flow characteristics around fishing net structure are investigated. Moreover, the vortex shedding frequency phenomenon associated with both the rigid cod-end and the moving bottom trawl is analyzed. We then present the analysis of the instability of the shear layer separating a moving trawl having 3 degrees of freedom. Using also the Proper Orthogonal Decomposition (POD) for such investigation, it is demonstrated the effectiveness of this procedure to extract not only the large scale...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00022/13280/10324.pdf

Système d'Information à référence spatiale et gestion d'un espace de production ostréicole : le cas du bassin de Marennes Oléron (France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Loubersac, Lionel; Populus, Jacques; Durand, Christophe; Prou, Jean; Kerdreux, Michel; Le Moine, Olivier.
Maintaining shellfish production activities, ensuring their quality and optimising the management of reserved space use with a perspective of sustainable growth are questions that interest a very significant block of French coastal sites. To achieve such objectives, it must especially be possible to relate the spatial distribution of the farmed stocks and environmental constraints: physical characteristics of the environment, nutritive resources, health constraints, environmental protection constraints...
Tipo: Text
Palavras-chave: Aménagement Littoral; Sédimentologie; Bathymétrie; Méthodologie; Cadastre; Bassin de Marennes Oléron; Traitement des données; Système d'Information géographique; SIG.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/1997/acte-3092.pdf

Deep Underwater Compatible Wi-Fi Antenna Development
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guarnizo Mendez, Hector; Le Pennec, Francois; Gac, Christian; Person, Christian.
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00211/32214/30656.pdf

Linkage between fishers' foraging, market and fish stocks density: Examples from some North Sea fisheries
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Marchal, Paul; Poos, Jan-jaap; Quirijns, Floor.
This study has investigated some properties of fishermen's foraging, using Levy flights theory. The case studies examined were a selection of North Sea Dutch and French vessels, for which catch and effort data were collected on a haul-by-haul basis. Foraging behavior could reasonably be represented by a Levy flight process, characterized by an exponentiation factor mu, for both fleets. The properties of fishers' foraging were further investigated for the Dutch fleet using time series analysis. Optimal foraging was found with mu = 1.5, suggesting a slow recovery dynamics of the stocks being harvested. Efficient foraging led to high value per unit effort, while the knowledge of fishing grounds with high stock density is shown to increase foraging efficiency...
Tipo: Text
Palavras-chave: Haul by haul data; Foraging; Fishing effort; Levy flights; Fleet behavior.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2314.pdf

Occurrence and seasonality of Vibrio aestuarianus in sediment and Crassostrea gigas haemolymph at two oyster farms in France
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Azandegbe, Afi; Gamier, Matthieu; Andrieux, Francoise; Kerouel, Roger; Philippon, Xavier; Nicolas, Jean-louis.
Vibrio aestuarianus is frequently found in coastal areas and can infect and induce mortalities in the pacific oyster Crassostrea gigas. However, nothing is known about its distribution and seasonality in the estuarine environment, especially where oyster farming is practiced. Its occurrence was investigated in sediment and oyster haemolymph at 2 oyster farms in Brittany (France) over 2 yr during 2 periods, from June to September 2007 and from February to June 2008. Total heterotrophic bacteria (HB) were cultured on marine agar while total Vibrio spp. and V. aestuarianus were selectively numerated using thiosulfate citrate bile salts sucrose agar (TCBS agar) and the species-specific hybridisation method, respectively. PCR was performed to detect V....
Tipo: Text
Palavras-chave: Vibrio aestuarianus; Crassostrea gigas Sediment; Seasonal abundance; Colony-blot.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00017/12813/9756.pdf

Altimetry-Based Diagnosis of Deep-Reaching Sub-Mesoscale Ocean Fronts
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Siegelman, Lia; Klein, Patrice; Thompson, Andrew F.; Torres, Hector S.; Menemenlis, Dimitris.
Recent studies demonstrate that energetic sub-mesoscale fronts (10–50 km width) extend in the ocean interior, driving large vertical velocities and associated fluxes. However, diagnosing the dynamics of these deep-reaching fronts from in situ observations remains challenging because of the lack of information on the 3-D structure of the horizontal velocity. Here, a realistic numerical simulation in the Antarctic Circumpolar Current (ACC) is used to study the dynamics of submesocale fronts in relation to velocity gradients, responsible for the formation of these fronts. Results highlight that the stirring properties of the flow at depth, which are related to the velocity gradients, can be inferred from finite-size Lyapunov exponent (FSLE) at the surface....
Tipo: Text
Palavras-chave: Altimetry; Finite-size Lyapunov exponent; Ocean dynamics; Sub-mesoscale.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00645/75666/76532.pdf

Merchant ships discharging unwanted marine species in close proximity of a French aquaculture area: Risks involved
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Masson, Daniel; Thomas, Gerard; Genauzeau, Sylvie; Le Moine, Olivier; Derrien, Annick.
The most important oyster farming area in Europe is in a close proximity of two medium size merchant ports. Cargo ships deballast in this area before loading, releasing unwanted or noxious marine species. During a sampling campaign aboard these arriving ships, we found in some ballast water samples a huge number of potentially toxic dinoflagellates and some potentially pathogenic bacteria. A model was applied to find the potential geographical spread of the discharged ballast water. This model predicts the water to reach highly vulnerable shellfish farmed areas in six to eight days.
Tipo: Text
Palavras-chave: Ballast water; Risk assessment; Toxin producing dinoflagellates; Shellfish farming; La Rochelle; Pathogenic bacteria.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00160/27130/25328.pdf

Munidopsis species (Crustacea: Decapoda: Munidopsidae) from carcass falls in Weijia Guyot, West Pacific, with recognition of a new species based on integrative taxonomy
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dong, Dong; Xu, Peng; Li, Xin-zheng; Wang, Chunsheng.
Several squat lobster specimens of the genus Munidopsis were collected from an artificially placed carcass fall (cow bones) on Weijia Guyot in the western Pacific Ocean. Based on morphological comparisons and molecular analysis, three specimens were confirmed as juveniles of M. albatrossae Pequegnat &amp; Pequegnat, 1973, which represents the first record of this species in the western Pacific. The other specimens collected are newly described as Munidopsis spinifrons sp. nov., which is distinguished from the closely related species in having a spinose rostrum and basal lateral eyespine on the eyestalk. The M. albatrossae from Weijia Guyot exhibited very low genetic distances when compared with a conspecific sample from Monterey Bay, USA, and the closely...
Tipo: Text
Palavras-chave: Munidopsis; Carcass fall; Weijia Guyot; New species; Molecular phylogeny.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00659/77083/78430.pdf

La croissance du merlu au large des côtes françaises de l'Atlantique (2e note)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Meriel-bussy, Mireille.
Tipo: Text
Ano: 1968
URL: https://archimer.ifremer.fr/doc/00417/52863/53775.pdf

Length–weight relations of 70 fish species (Actinopterygii) from tropical coastal region of Pernambuco, Northeast Brazil.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Viana, Andrea P.; Lucena-fredou, Flavia; Menard, Frederic; Fredou, Thierry; Ferreira, Valdimere; Lira, Alex S.; Le Loch, Francois.
The presently reported study provides length-weight relations (LWR) of 70 fish species (Actinopterygii) from the tropical coastal region of Pernambuco, Northeast Brazil: Achirus declivis, Achirus lineatus, Anchoa spinifer, Anchoa tricolor, Anchovia clupeoides, Archosargus rhomboidalis, Aspistor luniscutis, Aspistor quadriscutis, Bagre bagre, Bagre marinus, Bairdiella ronchus, Bathygobius soporator, Carangoides bartholomaei, Caranx hippos, Caranx latus, Caranx ruber, Centropomus parallelus, Centropomus pectinatus, Centropomus undecimalis, Chaetodipterus faber, Chloroscombrus chrysurus, Citharichthys spilopterus, Conodon nobilis, Ctenogobius boleosoma, Cynoscion virescens, Diapterus auratus, Diapterus rhombeus, Engraulis anchoita, Etropus crossotus,...
Tipo: Text
Palavras-chave: Ichthyofauna; Estuary; Coast; Allometry; Tropical South Atlantic.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00359/47039/72975.pdf

Water column and recent sediment data on diatoms and coccolithophorids, off Portugal, confirm sediment record of upwelling events
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Abrantes, F; Moita, Mt.
Diatom and coccolithophorid abundance and diatom assemblage composition found in the water column along the Portuguese margin, during upwelling and non-upwelling conditions, are compared to the distribution patterns observed in the recent sediments from the same area. The water column results indicate a one order of magnitude increase in phytoplankton biomass during upwelling conditions (summer), with diatoms being the most important contributors. Coccolithophorids, on the contrary, dominate the phytoplankton in winter (non-upwelling), The comparison of the upwelling and non-upwelling spatial distribution of these phytoplankton groups to their sedimentary record reveals the sediment record as a reflection of the upwelling situation, preserving most of its...
Tipo: Text
Palavras-chave: Upwelling; Portugal; Diatomée; Colonne d'eau; Sédiment; Upwelling; Portugal; Diatom; Water column; Sediment.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00325/43630/43253.pdf

Impacts of climate change on coastal benthic ecosystems: assessing the current risk of mortality outbreaks associated with thermal stress in NW Mediterranean coastal areas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pairaud, Ivane; Bensoussan, Nathaniel; Garreau, Pierre; Faure, Vincent; Garrabou, Joaquim.
In the framework of climate change, the increase in ocean heat wave frequency is expected to impact marine life. Large-scale positive temperature anomalies already occurred in the northwestern Mediterranean Sea in 1999, 2003 and 2006. These anomalies were associated with mass mortality events of macrobenthic species in coastal areas (0–40 m in depth). The anomalies were particularly severe in 1999 and 2003 when thousands of kilometres of coasts and about 30 species were affected. The aim of this study was to develop a methodology to assess the current risk of mass mortality associated with temperature increase along NW Mediterranean continental coasts. A 3D regional ocean model was used to obtain the temperature conditions for the period 2001–2010, for...
Tipo: Text
Palavras-chave: Climate change; Benthic communities; Ocean modelling; Model validation; Impact mapping.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00171/28210/27707.pdf

Le phosphore dans les sédiments aquatiques : formes géochimiques et méthodes d'identification
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Andrieux, Francoise.
Les formes géochimiques du phosphore dans la matière particulaire et les sédiments, ainsi que les méthodes globales ou spécifiques utilisées pour les identifier sont présentées. Puis une revue des concentrations obtenues par plusieurs auteurs dans différents types de sédiments est réalisée. Enfin, l'analyse des travaux sur la biodisponibilité du phosphore sédimentaire met en évidence la difficulté de l'évaluer spécifiquement pour les différentes formes rencontrées.
Tipo: Text
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00082/19347/16941.pdf

Catastrophic ice shelf breakup as the source of Heinrich event icebergs
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hulbe, Cl; Macayeal, Dr; Denton, Gh; Kleman, J; Lowell, Tv.
Heinrich layers of the glacial North Atlantic record abrupt widespread iceberg rafting of detrital carbonate and other lithic material at the extreme-cold culminations of Bond climate cycles. Both internal (glaciologic) and external ( climate) forcings have been proposed. Here we suggest an explanation for the iceberg release that encompasses external climate forcing on the basis of a new glaciological process recently witnessed along the Antarctic Peninsula: rapid disintegrations of fringing ice shelves induced by climate-controlled meltwater infilling of surface crevasses. We postulate that peripheral ice shelves, formed along the eastern Canadian seaboard during extreme cold conditions, would be vulnerable to sudden climate-driven disintegration during...
Tipo: Text
Palavras-chave: Heinrich events; Ice shelf disintegration.
Ano: 2004
URL: https://archimer.ifremer.fr/doc/00228/33921/32219.pdf

Can stochastic variations in recruitment induce long-term fluctuations in the carrying capacity?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fromentin, Jean-marc.
Long-term fluctuations in fish abundance are generally attributed to low frequency processes, such as human exploitation and/or environmental and climatic changes. Based on recent studies and simple simulations, this manuscript shows how long-term fluctuations in the carrying capacity and/or spawning stock biomass of a long-live species, such as the Atlantic bluefin tuna, may simply arise from stochastic variations in the recruitment. The implications of such a feature are discussed and compared among different Atlantic tunas and tuna-like species.
Tipo: Text
Palavras-chave: Long-term fluctuations; Recruitment; Atlantic tunas; Stochastic variations; Life history; Lifespan; Spawning stock biomass.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00194/30499/28909.pdf

Unsuspected intraspecific variability in the toxin production, growth and morphology of the dinoflagellate Alexandrium pacificum R.W. Litaker (Group IV) blooming in a South Western Mediterranean marine ecosystem, Annaba Bay (Algeria)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hadjadji, Imen; Laabir, Mohamed; Frihi, Hocine; Collos, Yves; Shao, Zhao Jun; Berrebi, Patrick; Abadie, Eric; Amzil, Zouher; Chomérat, Nicolas; Rolland, Jean-luc; Rieuvilleneuve, Fabien; Masseret, Estelle.
Physiological plasticity gives HABs species the ability to respond to variations in the surrounding environment. The aim of this study was to examine morphological and physiological variability in Alexandrium pacificum R.W. Litaker (Group IV) (former Alexandrium catenella) blooming in Annaba bay, Algeria. Monoclonal cultures of up to 30 strains of this neurotoxic dinoflagellate were established by the germination of single resting cysts from the surface sediment of this southern Mediterranean marine ecosystem. Ribotyping confirmed formally for the first time that A. pacificum is developing in Eastern Algerian waters. Toxin analyses of A. pacificum strains revealed substantial intraspecific variability in both the profile and toxin amount. However, the...
Tipo: Text
Palavras-chave: Alexandrium pacificum; Mediterranean; Toxin profile; Growth; Intraspecific variability.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00624/73620/73598.pdf

Dynamique sédimentaire sur le plateau des Açores pour les derniers 400 ka : distribution, lithologie, flux et processus. Implications paléocéanographiques
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dennielou, Bernard.
Le plateau des Açores est une région volcanique située à 38°N-30°W dans l'océan Atlantique nord. Il se trouve à une profondeur d'eau moyenne comprise entre 1000 et 2000 mètres et se caractérise par la présence de 8 îles volcaniques, d'une dizaine de petits segments de dorsale et par une activité hydrothermale. Il constitue une triple limite de plaque entre l'Amérique, l'Europe et l'Afrique. L'éloignement des continents et sa localisation dans le gyre subtropical en font, vis à vis de l'Atlantique nord, une région à faibles apports terrigènes et biogènes. Il se situe également au sud de limite d'extension du front polaire (42°N) lors des époques glaciaires, et n'est pas soumis à la forte variabilité climatique de l'Atlantique nord.
Tipo: Text
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00034/14505/11847.pdf

International Bottom Trawl Survey (IBTS2019-Q1). French cruise report
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lazard, Coline; Verin, Yves; Auber, Arnaud.
IBTS surveys (International Bottom Trawl Survey) are carried out within an international framework. Main countries bordering the North Sea participate to it according to the European Community regulations (EC N°1543/2000 and N° 1639/2001) which specify that countries from E.U. have to carry out surveys at sea in order to evaluate abundance and stocks distribution, independently of commercial fisheries data. The first target of the IBTS survey is to have a diagnosis on the main commercial fish stock and to calculate abundances index by age for these species. This survey started in the years 70’s and gradually standardised. Since the years 80’s, a common protocol is implemented and used by all participants. The same fishing gear and the same working methods...
Tipo: Text
Palavras-chave: North sea; GOV; Beam trawl; MIK; Abundance; Stock assessment.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00507/61899/65990.pdf

Echinoderm egg and larval quality as a function of adult nutritional state
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: George, Sb.
Differences in egg and larval quality for some sea urchins and seastars were investigated in the field acid in the laboratory. In the field, sea urchins and seastars found at sites with an abundant supply of food were larger, and they produced large numbers of large, high quality eggs. For some female seastars, nutritional history determined the response to variation in food supply in the laboratory. While an increase in food ration did not affect the size of eggs produced by females from the favorable site, an increase in food ration led to an increase in egg size for those from the less favorable site. For all the echinoderms examined, egg numbers decreased when conditions became unfavorable. Larvae from females living in favorable environments grew and...
Tipo: Text
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00094/20488/18158.pdf

Etude et mise au point d'un chalut muni d'une grille sélective à langoustine (Campagne selmerl 2, juin 2002 )
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Morandeau, Fabien; Meillat, Marc.
Poursuite des  essais de mise au point d'une grille sélective à langoustine des mois avril  et mai 2002. Des chaluts jumeaux sont utilisés afin de comparer le dispositif à tester. La zone couverte concerne la pêcherie langoustine et merlu dans le sud ouest des îles Glénan et l'ouest de l'île de Groix. La période  est le mois de juin, époque favorable pour les espèces mentionnées ci-dessus. Deux nouvelles grilles bizeautées ont été réalisée par le laboratoire matériaux et structure  du centre IFREMER  de Brest . Les premiers résultats sont négatifs en ce qui concerne le «tri» de la langoustine effectué par la petite grille souple bizeautée .
Tipo: Text
Palavras-chave: Breizline; Codend; Nephrops grid; Grid; Selectivity; Fishing; Chaussettes; Polyéthylène; Breizline; Cul de chalut; Grille à langoustines; Grille; Sélectivité; Pêche.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/rapport-6758.pdf

Plancton et squales
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Loas, Violeta.
We want to thank Anita Conti for entrusting us with some samples collected May 1, 1958, at the south-west of Belle-Ile, on board the "Tohy", a fishing launch from the Péchenart fleet. They are plankton samples collected at sea and at depths of 30 to 45 m, and in different parts of the digestive tract of basking sharks (Cetorhinus maximus Günner), abounding in the same waters. Let's take a look at these samples.
Tipo: Text
Ano: 1958
URL: http://archimer.ifremer.fr/doc/1958/publication-4635.pdf

Les facteurs de verdissement de l'huître en claires : le milieu hydrobiologique et benthique et ses variations
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Moreau, Jean.
In a preliminary work (MOREAU, 1967), the importance of the role of pigments in fattening ponds and the part they played in the process of Navicula ostrearia B.'s pigmentation had been studied in fattening ponds situated at two different points of the Marennes-Oléron basin. The first of these fattening ponds were located in the Seudre Valley, at La Tremblade and at Eguillate, the second ones in the Daire area more widely fed by coastal waters and where the greening conditions of the fattening ponds are different from those observed in Seudre (figure 1 and table 1). 370 Dosing the potency of various chlorophylls had highlighted a noticeable constancy of chlorophyll B and, a variance for those of type A and C (table 2) which had made it possible to conclude...
Tipo: Text
Palavras-chave: Marennes Oléron; Navicula ostrearia; Pigment; Facteurs; Verdissement; Claire à huîtres.
Ano: 1968
URL: http://archimer.ifremer.fr/doc/1968/publication-2982.pdf

Seasonality, abundance, and fifteen-year trend in green turtle nesting activity at Itsamia, Moheli, Comoros
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bourjea, Jerome; Dalleau, Mayeul; Derville, S.; Beudard, F.; Marmoex, C.; M'Soili, A.; Roos, David; Ciccione, S.; Frazier, J.
Nesting green turtles Chelonia mydas were studied at Moheli Island, Union of Comoros, southwestern Indian Ocean (SWIO). Five contiguous beaches near Itsamia village, in the southeastern part of the island, were monitored daily for nesting activity from January 1999 to June 2007 and irregularly between August 2009 and December 2014; nesting success was recorded from 2000 to 2006. Nesting occurred year-round and peaked in the austral winter, from March through August, with the highest values in May. During the 7 yr period when nesting success was recorded, 63164 successful nestings were reported, and the total was 69630 when estimates of missing data were included. The average rate of nesting success was 0.49 (SD = 0.04, n = 7). Using the estimate of 3.03...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00266/37733/35745.pdf

Evaluation environnementale / évaluation des incidences Natura 2000 des schémas départementaux des structures des exploitations de cultures marines. Côtes d'Armor et Ille-et-Vilaine
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rollet, Claire.
Tipo: Text
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00157/26777/81294.pdf

Qualité biologique des eaux des marais du Pertuis Charentais: suivi des eaux de rejets agricoles en milieu marin: tests larvaires sur l'huître Crasssotrea gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Noyon, Anastasia.
La situation difficile des agriculteurs des marais littoraux charentais, à la fin des années 1970, a entraîné une mise en culture intensive de ces marais, dès les années 1980. Cependant l' utilisation conjointe de produits phytosanitaires*, suscite de fortes inquiétudes des conchyliculteurs". Le littoral de Charente Maritime, était autrefois bordé par de marais salants. A la suite du déclin de cette activité, on a vu se développer l'ostréiculture sur le marais salé, et l'agriculture sur le marais doux. Les activités agricoles étaient essentiellement constituées d'élevages extensifs, ce qui ne posait pas de problèmes entre les deux activités (Anas L.1997). Cependant, depuis les années 1980, la rentabilité de tels élevages, ne permet plus d'assurer des...
Tipo: Text
Ano: 2005
URL: http://archimer.ifremer.fr/doc/00412/52319/53088.pdf

Microzooplankton distribution in the northern adriatic sea with emphasis on the relative abundance of ciliated protozoans
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Revelante, N; Gilmartin, M.
Tipo: Text
Ano: 1983
URL: http://archimer.ifremer.fr/doc/00120/23127/20974.pdf

Investigating interconnected fisheries: a coupled model of the lobster and herring fisheries in New England
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lehuta, Sigrid; Holland, Daniel S.; Pershing, Andrew J.
Ostensibly separate fisheries are often linked through ecological, environmental, and human mediated processes that can impact their productivity, profitability, and resilience; however, managers rarely explicitly account for these linkages. We present a coupled bioeconomic model of the American lobster (Homarus americanus) and Atlantic herring (Clupea harengus) fisheries in the northeast United States. The model builds upon existing stock assessment models and includes key characteristics of both fisheries including size- or age-structured populations, seasonal patterns of lobster exploitation, and seasonal-spatial patterns of herring exploitation. The lobster and herring models are linked through a bait market module that drives behavior of the herring...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00181/29252/27679.pdf

La France et le droit de la mer
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dupuy, R.j.
This work does not aim to defend or criticize. It is made of a collection of studies conducted, under our authority, by the team (RCP n° 258 of the CNRS) created two years ago, within the Institut du Droit de la Paix et du Développement (1), to study the questions raised by the questioning of marine legislation by, on the one hand, technical development and, on the other hand, the disputation of traditional legislation by developing countries.
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1974
URL: http://archimer.ifremer.fr/doc/1974/rapport-4802.PDF

Introduction to the BASIN Special Issue: State of art, past present a view to the future
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: St John, M. A.; Barange, M.; Benway, H.; Flynn, K. J.; Holt, J.; Merino, G.; Martin, A.; Mitra, A.; Melle, W.; Sanders, R.; Trenkel, Verena M.; Grigorov, I.; Hoffman, E.
Tipo: Text
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00243/35420/33946.pdf

JERICO-NEXT. Progress Report #2
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Puillat Felix, Ingrid; Karlson, Bengt; Artigas, Luis Felipe; Grémare, Antoine; Nizzetto, Luca; Rubio, Anna; Laakso, Lauri; Seppala, Jukka; Mourre, Baptiste.
The WP4 of the JERICO-Next is a synthesis of the project built upon activities in other WPs, gathering the consortium around applied Joint Research Activity Projects (JRAPs) selected to put forward the added value of JERICO-NEXT. In order to reach this objective, WP4 keeps on track the JERICO-NEXT course of actions via synthesis and application activities based on interactions with other WPs. WP4 helps establishing some topical approaches for the scientific strategy in WP1 (task 1.2) and will give inputs to establish the network strategy after JERICO-NEXT (task 1.6). Indeed, six JRAPs are being implemented to address different key environmental questions and/or policy requirements such as those considered by the MSFD, and according to the 6 JERICO...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00406/51702/52267.pdf

Contribution a l'étude du pétoncle (Chlamys varia L.)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Letaconnoux, Robert; Audouin, Jacques.
The scallop Chlamys varia L. is a common shellfish of the Atlantic coast, a little rarer in the English Channel. It forms large banks in the roadstead of Brest and in the area of La Rochelle, along the north-eastern coast of the Isle of Ré, as well as between the Isle of Oléron and the continent. Some very depopulated banks can still be found in the Arcachon Bay and in some parts of the Mediterranean coast.Near La Rochelle, scallops are fished by boats using drags with an opening of 1 m and a round leading edge. It is limited to two hours per day from November to March, in order to protect the stocks. Sixty to eighty small motor boats or sardine boats take part in this fishery, catching around 800 tonnes per year, that is to say half the production of the...
Tipo: Text
Ano: 1956
URL: http://archimer.ifremer.fr/doc/1956/publication-4665.pdf

Effect of type of binder on growth, digestibility, and energetic balance of Octopus maya
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rosas, C; Tut, J; Baeza, J; Sanchez, A; Sosa, V; Pascual, C; Arena, L; Domingues, P; Cuzon, Gerard.
The present study was designed to test the effects of type of binder on growth, nutritional physiology, total apparent digestibility, and some elements of the energetic balance of early O. maya juveniles. Two experiments were performed. One was aimed at evaluating the effect of type of binder on growth, nutritional physiology, and energetic balance and the other at knowing the effect of the binder on total apparent digestibility of O. maya. Binder type affected growth and survival of early O. maya juveniles. Octopuses fed alginate-bound crab meat lost weight and died, revealing that this type of binder limits nutrient absorption from the diet. In contrast, when gelatin was used as binder, energetic balance was similar to that obtained in animals fed...
Tipo: Text
Palavras-chave: Growth rate; Energetic balance; Diet binder; Digestibility; Octopus maya.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-3949.pdf

Contrôles de la distribution spatiale de l'habitat de reproduction chez les populations de poissons. Approche multi-modèles appliquée à la plie et au merlan de Mer du Nord et à l'anchois du Golfe de Gascogne
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Loots, Christophe.
Spawning is a crucial phase of fish life cycle as it ensures the renewal of individuals in the population. The identification of factors that influence its spatial dynamic is therefore a key feature as it will affect the reproduction success of fish population. A multi-model approach has been developed in order to identify factors that control the spatial distribution of spawning adults of plaice and whiting in the North Sea and of anchovy in the Bay of Biscay. Generalised additive models have been used to relate presenceabsence of adults and their abundances to several hypotheses of control external (geographical position and environment) and internal to the population (spatial dependency, size, age structure and memory). Models were then ranked according...
Tipo: Text
Palavras-chave: Anchovy; Whiting; Plaice; Multi model approach; Hypotheses of control; Habitat; Spawning; Anchois; Merlan; Plie; Approche multi modèles; Hypothèses de contrôle; Habitat; Reproduction.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/these-7400.pdf

Analyse de la structure du système de pêche artisanal guyanais. Introduction à sa dynamique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Blanchard, Fabian; Charuau, Anatole; Rose, Joel; Achoun, Joseph.
Les activités de la petite pêche et de la pêche côtière en Guyane ne sont pas encore assez bien organisées pour permettre un suivi rigoureux. On sait surtout qu'il s'agit d'une activité en baisse et le déclin amorcé au début des années 80 n'a fait que se confirmer dans les années récentes. Alors que le nombre de bateaux pratiquant de façon régulière la petite pêche avoisinait les 150 en 1985, en 1998, la flottille était réduite à 65 unités. Un chiffre fera mieux comprendre cette évolution: dans les années 80, il y a eu jusqu'à 12 tapouilles à Cayenne, alors qu'à la fin 1998, il en restait 4. On peut espérer qu'en 1999, 2 tapouilles supplémentaires et les 3 navires expérimentaux construits par la Région Guyane viendront s'ajouter à cette flottille et...
Tipo: Text
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00075/18612/16165.pdf

Connectivities with shellfish farms and channel rivers are associated with mortality risk in oysters
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gangnery, Aline; Normand, Julien; Duval, Cyrielle; Cugier, Philippe; Grangeré, Karine; Petton, Bruno; Petton, Sebastien; Orvain, Francis; Pernet, Fabrice.
Oyster diseases have major consequences on fisheries and aquaculture. In France, young Pacific oysters Crassostrea gigas are severely hit by the ostreid herpesvirus, whereas adults suffer mortalities presumably caused by pathogenic bacteria. Here we investigated the origin and spread of mortalities that affect both young and adult oysters, and we identified and compared their risk factors. Mortality was monitored in 2 age classes of oysters deployed in early spring at 39 sites spread over a 37 km2 surface area inside and outside of shellfish farms. Environmental data obtained from numerical modelling were used to investigate risk factors. Mortality of young oysters associated with ostreid herpesvirus occurred in the oyster farming area. Hydrodynamic...
Tipo: Text
Palavras-chave: Aquaculture; Bivalve; Disease; Epidemiology and health; Ecological modelling; Hydrodynamic connectivity.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00588/69983/67896.pdf

Réaction de réduction de l'oxygène sur les aciers inoxydables en eau de mer naturelle. Influence du biofilm sur les processus de corrosion
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Bozec, Nathalie.
iofilm development on stainless steels immersed in natural seawater can have prejudicial consequences on the resistance of these materials to corrosion . The goal of the present study was to get more precise information on the corrosion processes, and especially on the oxygen reduction reaction. As the reaction is linked to the stainless steel surface state, the characterisation of the oxides films (composition, structure, thickness...) is essential to understand the mechanisms and the oxygen reduction kinetic. The first aim of the study has been to correlate the oxygen reduction processes with the characteristics of the oxides layer as a function of the alloy surface treatment (mechanical polishing, electrochemical passivation and prereduction, chemical...
Tipo: Text
Palavras-chave: Hydrogen peroxide; Oxides layer; Biofilm; Oxygen reduction; Corrosion; Seawater; Stainless steels; Peroxyde d'hydrogène; Films d'oxydes; Biofilm; Réduction de l'oxygène; Corrosion; Eau de mer; Aciers inoxydables.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2004/these-223.pdf

Compactation for a better management of marine biomass: applications to fish discards and by-products
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Perez-galvez, Raul.
In the framework of the future application of a zero-discard policy in EU fisheries, this thesis aims to develop and implement an efficient and integral waste management both on board the fishing vessels and in land (fish auctions and fish processing industry). To this end, it proposes a compaction operation able to reduce the volume and the water activity of the fish wastes, thus favouring their handling and reducing the economical costs associated to their transport and storage. To asses the viability of a waste compaction operation, the main operation factors governing the process were identified, and their influence upon the performance of the compacting operation was investigated by a statistical approach. Sardine was chosen as fish species since it...
Tipo: Text
Palavras-chave: Environment; Compression; Aquaculture; Fishing; By product; Environnement; Compression; Aquaculture; Pêche; Co produit.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/these-7390.pdf

Vibrations of Mertz glacier ice tongue, East Antarctica
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lescarmontier, L.; Legresy, B.; Coleman, R.; Perosanz, F.; Mayet, C.; Testut, L.
At the time of its calving in February 2010, Mertz Glacier, East Antarctica, was characterized by a 145km long, 35km wide floating tongue. In this paper, we use GPS data from the Collaborative Research into Antarctic Calving and Iceberg Evolution (CRAC-ICE) 2007/08 and 2009/10 field seasons to investigate the dynamics of Mertz Glacier. Twomonths of data were collected at the end of the 2007/08 field season from two kinematic GPS stations situated on each side of the main rift of the glacier tongue and from rock stations located around the ice tongue during 2008/09. Using Precise Point Positioning with integer ambiguity fixing, we observe that the two GPS stations recorded vibrations of the ice tongue with several dominant periods. We compare these results...
Tipo: Text
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00140/25136/23246.pdf

Workshop on Small-Scale Fisheries. Kavala, Greece 12th -16th September 2005
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
The workshop on Small-Scale Fisheries took place in Kavala, Greece, from the 12th until the 16th of September 2005. Representatives of 12 countries attended the meeting. Priory to the workshop a discussion was held on “Fleet based approach for the Mediterranean Small Scale Fisheries according to the conclusions of the last Mediterranean coordination meeting in Athens”.
Tipo: Text
Ano: 2005
URL: http://archimer.ifremer.fr/doc/00146/25752/23865.pdf

Identifying adverse outcome pathways (aop) for Amsterdam city fish by integrated field monitoring
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Van Der Oost, Ron; Mckenzie, David; Verweij, Frank; Satumalay, Carl; Van Der Molen, Natascha; Winter, Matthew J.; Chipman, J. Kevin.
The European City Fish project aimed to develop a generic methodology for ecological risk assessment for urban rivers. Since traditional methods only consider a small fraction of substances present in the water cycle, biological effect monitoring is required for a more reliable assessment of the pollution status. A major challenge for environmental risk assessment (ERA) is the application of adverse outcome pathways (AOP), i.e. the linking of pollutant exposure via early molecular and biochemical changes to physiological effects and, ultimately, effects on populations and ecosystems. We investigated the linkage between responses at these different levels. Many AOP aspects were investigated, from external and internal exposure to different classes of...
Tipo: Text
Palavras-chave: Adverse outcome pathways; Micropollutants risk assessment; Biochemical &amp; physiological biomarkers; Ecological studies.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00592/70451/68775.pdf

Evidence of the presence of viral shellfish contamination in shellfish after short rainfall events
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Saux, Jean-claude; Serais, Ophelie; Krol, Joanna; Parnaudeau, Sylvain; Salvagnac, P.; Delmas, G.; Cicchelero, V.; Claudet, J.; Pothier, P.; Balay, K.; Fiandrino, Annie; Pommepuy, Monique; Le Guyader, Soizick.
Infectious diseases linked to the consumption of raw shellfish have long been identified. Over the past century, various strategies have been set up in shellfish growing areas throughout the world to guarantee the sanitary quality of shellfish and to protect consumers. However despite sanitary improvements, human enteric viruses - especially Hepatitis A virus and norovirus– have been found to be associated with shellfish outbreaks. A recent example demonstrated the impact of storm events. Following heavy rain and sewage overflow, shellfish beds were contaminated and the shellfish from them were marketed after depuration. However, since viruses persist longer than fecal contamination indicator bacteria, several clusters of gastroenteritis cases were...
Tipo: Text
Palavras-chave: Virus; Shellfish; Contamination events.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00066/17736/15257.pdf

Le marais salé des pertuis charentais : à la recherche d'un développement durable
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Prou, Jean; Heral, Maurice.
Sustainable development of the marine part of the wetlands located on the Atlantic coast of France (Pertuis Charentais) implies the difficult integration of European and national regulations in the regional frame. Spatial and temporal patterns of this area show the strong relationship between human activities (salt, sheIlfish farming, agriculture, fisheries...) and physical evolution of this area. Regulations based on zoning have to be completed by more precise studies including the major role of water uses regulated by human practices.
Tipo: Text
Palavras-chave: Regulations; Shellifish farming; Sustainable development; Wetlands; Pertuis Charentais; Ostréiculture; Développement durable; Marais salé.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/1997/acte-3235.pdf

Vitamin requirements of juvenile penaeid shrimp
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Conklin, D.
The results of supplementing crustacean feeds with vitamins are examined specifically from the standpoint of shrimp culture. Micro-nutrients selected for discussion include: water-soluble vitamins of the B-complex, choline and inositol, vitamin C and the fat-soluble group of vitamins: A, D, E and K. Ways in which utilization of vitamins and ultimately dietary demand are altered by physiological state, conditions of culture, as well as factors which impact on feed levels, are explored.
Tipo: Text
Palavras-chave: Penaeidae; Malacostraca; Diets; Marine crustaceans; Nutrients (mineral); Nutritional requirements; Juveniles; Feed; Vitamins.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1469.pdf

Voyage du S.Y. Belgica 1897-1899. Volume 9. Zoologie. Tanaidacés, isopodes, amphipodes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Monod, T.
La collection d'Isopodes rapportée par l'expédition de la BELGICA comprend deux séries bien distinctes : 1) une série de formes sub-antarctiques provenant des terres magellaniques , espèces littorales , intercotidales (l'une d'entre elles est même un Isopode terrestre, Cloportide ligiidé), et 2) une série d'espèces véritablement antarctiques recueillies au faubert (dans un cas au filet planctonique) au bord du plateau continental du socle sud-polaire, par des fonds moyens de 400-500 m., au S.-W. de la Terre de Graham. [OCR NON CONTRÔLE]
Tipo: Text
Palavras-chave: Amphipodes; Isopodes; Tanaidacés; Zoologie; Campagne océanographique; Histoire.
Ano: 1903
URL: http://archimer.ifremer.fr/doc/1903/publication-6924.pdf

Within outlying mean indexes: refining the OMI analysis for the realized niche decomposition
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Karasiewicz, Stephane; Doledec, Sylvain; Lefebvre, Sebastien.
The ecological niche concept has regained interest under environmental change (e.g., climate change, eutrophication, and habitat destruction), especially to study the impacts on niche shift and conservatism. Here, we propose the within outlying mean indexes (WitOMI), which refine the outlying mean index (OMI) analysis by using its properties in combination with the K-select analysis species marginality decomposition. The purpose is to decompose the ecological niche into subniches associated with the experimental design, i.e., taking into account temporal and/or spatial subsets. WitOMI emphasize the habitat conditions that contribute (1) to the definition of species' niches using all available conditions and, at the same time, (2) to the delineation of...
Tipo: Text
Palavras-chave: Biological constraint; Niche dynamic; Marginality; Community; Spatio-temporal; Subniche; Habitat.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00389/49999/50584.pdf

Impact of organic matter source and quality on living benthic foraminiferal distribution on a river-dominated continental margin: A study of the Portuguese margin
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dessandier, Pierre-antoine; Bonnin, Jerome; Kim, Jung-hyun; Bichon, Sabrina; Deflandre, Bruno; Gremare, Antoine; Damste, Jaap S. Sinninghe.
Living (rose Bengal stained) benthic foraminifera were investigated on surface sediments from 23 stations from the river-dominated northwestern Portuguese margin. Samples were collected in March 2011, following the period of the maximum rainfall over the Iberian Peninsula, between 20 and 2000m water depth along five cross-margin transects. Four of them are located off the Douro, Mondego, Tagus, and Sado Rivers and one off the Estremadura coast. The major objectives of this study are (1) to assess the impact of organic matter of various origin and quality on the benthic foraminifera and (2) to investigate the spatial differences of faunal distribution from coastal waters to the deep sea under river influences. To do this, sedimentological and biogeochemical...
Tipo: Text
Palavras-chave: Benthic foraminiferal ecology; Fluvial influence; Organic matter quality; Portuguese margin.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00667/77896/80083.pdf

Examen microscopique des huitres plates de l'estuaire du Belon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Herrbach, Bernadette.
Samples of oysters, Ostrea edulis, collected from badly decimated beds in the Belon estuary in July 1969 and July 1970 were examined microscopically in an attempt to determine the cause of death. Although large numbers of ciliates belonging to the ancistrocomidae were found in the digestive mass, no sign of any parasitic or viral disease was found in the tissues. On the other hand, oysters in poor condition exhibited a hypersecretion of mucopoly-saccharides covering the whole surface of the gastric epithelium. This condition, and the existence of a massive infiltration of the connective tissue and the blood sinuses by hyaline haemocytes, indicates a defense reaction against some unknown changes in the physico-chemical environment.
Tipo: Text
Ano: 1971
URL: http://archimer.ifremer.fr/doc/1971/publication-2378.pdf

Qualité des milieux naturels
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Legube, Bernard; Montigny, Frédéric; Bustamante, Paco; Bareille, Gilles; Baudrimont, Magalie; Cachot, Jerome; Guibaud, Gilles; Hechard, Yann; Labanowski, Jérôme; Lacoue-labarthe, Thomas; Mondamert, Leslie; Budzinski, Hélène; Prou, Jean; Gazeau, Alain; Hulin, Agnès; Bunales, Rafaël; Villenave, Eric; Chabbi, Abad; Atteia, Olivier; Bouchon, Didier; Denaix, Agnès; Chery, Philippe; Pellerin, Sylvain; Rumpel, Cornelia.
L’impact du changement climatique sur la qualité et la pollution des milieux est souvent négligé par rapport à d’autres impacts plus médiatisés (e.g. événements climatiques et hydrologiques extrêmes, santé, trait de côtes, disponibilité des ressources en eau…). Les eaux et l’air de Nouvelle-Aquitaine, et à moindre mesure les sols, déjà significativement pollués, subiront pourtant plusieurs détériorations significatives, qui sont présentées et discutées dans ce chapitre. Certains de ces effets sont déjà visibles et vont s’aggraver dans le contexte climatique prévu. Il s’agit principalement, pour l’eau douce superficielle, de l’augmentation de la température, de la diminution des débits des cours d’eau, de l’évolution des espèces aquatiques et du...
Tipo: Text
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00444/55578/57190.pdf

Structure and properties of fibres from sea-grass (Zostera marina)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Davies, Peter; Morvan, C; Sire, O; Baley, C.
This paper presents results from a study of fibres extracted from Zostera marina eel-grass collected from the Baltic coast. This species of sea-grass is shown to contain small diameter (around 5 mu m) fibres composed of similar to 57% cellulose, similar to 38% of non-cellulosic polysaccharides (mainly xylan) and similar to 5% of residual matter so-called Klason lignin. This composition is quite different to that of commonly used terrestrial fibres. Single fibre stiffness values up to 28 GPa were measured. This stiffness combined with a low density could provide an attractive reinforcement for composite materials, and may be particularly suitable for use in bio-degradable structures.
Tipo: Text
Palavras-chave: Xylan; Tension; Mechanical behaviour; IR spectroscopy; Sea grass; Fibre.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2607.pdf

Suivi des facteurs climatiques susceptibles de jouer un rôle dans les apparitions d'eaux colorées, en baie de Vilaine, durant l'année 1985
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Maggi, Pierre; Mastouri, Abderrazak; Lassus, Patrick; Soulard, Louis; Cadiou, Yvon; Le Paul, Christine.
Contrairement à 1983 et 1984, le bloom printanier à diatonées Skeletonema costatum ne s'est pas manifesté en 1985 par une coloration marron des eaux superficielles, certains facteurs ayant été défavorables de la mi-mars à la mi-avril : températures basses, vents modérés et forts abondants, mer agitée à très forte. Le bloom estival à Thalassiosira sp. et Rhizosolenia delicatula apparu fin mai a été favorisé par l'importante pluviosité de la mi-mars à la mi-avril, l'élévation de température de fin mai et début juin, la faible agitation de la mer et la dominance des vents calmes, faibles et modérés en mai et juin. Ce bloom cessera, fin juin, en grande partie sous l'action des vents qui agiteront la mer, cassant ainsi la stratification thermo-haline établie.
Tipo: Text
Ano: 1986
URL: http://archimer.ifremer.fr/doc/00105/21634/19214.pdf

Observation of Mesoscale Instabilities of the Northern Current in the North Western Mediterranean Sea: a combined study using Gliders, Surface Drifters, Moving Vessel Profiler and Vessel Data in the Ligurian
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pairaud, Ivane; Garreau, Pierre; Le Berre, David; Fernandez, Delphine; Bellomo, Lucio; Garnier, Valerie.
The Northern Current (NC) is a branch of the general North-Western Mediterranean cyclonic circulation extending from the Ligurian to the Catalan Sea (Millot, Dynamics of Atmospheres and Oceans, vol. 15, 1991). In winter and early spring, instabilities of this slope current are intense and can generate eddies, meanders and filaments. The study of mesoscale structures is crucial in the coastal area because of their physical and biogeochemical impact on ecosystems. They play a role in water, chemicals and nutrients transport, vertical mixing and possible trapping of biological materials. Results from a combined observational effort put forth in March 2012 during the IMEDIA cruise dedicated to eddy tracking are presented. This work aims at providing...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00410/52142/52859.pdf

Mercury in the Lot-Garonne River system (France): Sources, fluxes and anthropogenic component
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Schafer, J; Blanc, Gerard; Audry, S; Cossa, Daniel; Bossy, C.
Dissolved and particulate Hg fluxes in the Lot-Garonne-Gironde fluvial-estuarine system were obtained from observation of daily discharge and suspended particulate matter (SPM) concentrations. In addition to the measurements of the total dissolved (&lt; 0.45 gm) and particulate Hg (&gt; 0.45 gm), called HgTD and HgTp respectively, the dissolved inorganic Hg species (HgRD) were determined monthly. Geochemical background values for HgTp in sediments and SPM were similar to crustal values and to typical concentrations in SPM of non-contaminated river systems, respectively. The Riou Mort watershed already known as the origin of important historical polymetallic (e.g., Cd, Zn) pollution was identified as an important Hg point source. In the downstream Lot...
Tipo: Text
Palavras-chave: Lot; Garonne; SPM; River; Organic matter; Mercury.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1343.pdf

Rapport sur les pêcheries ou bouchots de la Baie du Mont Saint Michel
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chevey, P.
Les Pêcheries ou bouchots de la région de Cancale peuvent compter parmi les exploitations de pêche les plus anciennes du littoral français. Elles furent concédées bien avant l'Édit de Moulins (1584).
Tipo: Text
Ano: 1925
URL: http://archimer.ifremer.fr/doc/00005/11616/8261.pdf

Impacts cumulatifs et synergiques : l’exemple des mammifères marins. Sous-région marine Manche - Mer du Nord. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kostecki, Caroline; Le Pape, Olivier.
Tipo: Text
Palavras-chave: Manche; Mer du Nord; Mammifères marins; Activités anthropiques; Pressions; Menaces.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00328/43884/43458.pdf

Enhanced viral production and virus-mediated mortality of bacterioplankton in a natural iron-fertilized bloom event above the Kerguelen Plateau
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Malits, A.; Christaki, U.; Obernosterer, I.; Weinbauer, M. G.
Above the Kerguelen Plateau in the Southern Ocean natural iron fertilization sustains a large phytoplankton bloom over 3 months during austral summer. During the KEOPS1 project (KErguelen Ocean and Plateau compared Study1) we sampled this phytoplankton bloom during its declining phase along with the surrounding high-nutrient-low-chlorophyll (HNLC) waters to study the effect of natural iron fertilization on the role of viruses in the microbial food web. Bacterial and viral abundances were 1.7 and 2.1 times, respectively, higher within the bloom than in HNLC waters. Viral production and virus-mediated mortality of bacterioplankton were 4.1 and 4.9 times, respectively, higher in the bloom, while the fraction of infected cells (FIC) and the fraction of...
Tipo: Text
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00291/40209/39235.pdf

Arms winding around a meddy seen in seismic reflection data close to the Morocco coastline
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Menesguen, Claire; Hua, Bach-lien; Carton, Xavier; Klingelhoefer, Frauke; Schnurle, Philippe; Reichert, C.
The North Atlantic temperature and salinity distributions are strongly influenced by the existence of Mediterranean eddies (meddies) which significantly contribute to the transport of the warm and salty Mediterranean Water along different pathways. The most common pathways are observed to be North and West of the Canary Current. However, a 2011 seismic reflection cruise conducted by BGR and Ifremer near the North-Western African margin of Morocco, MIRROR Leg 2, revealed the presence of a meddy south of the Azores front and very close to the Morocco coastline. This unusual location of a strong Mediterranean Water anomaly is confirmed by other data. Moreover, meddies are long-lived structures whose dynamics and dissipation are not yet completely understood....
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00074/18499/16046.pdf

Morphological variability of Bathybdella sawyeri (Hirudinida : Piscicolidae) from hydrothermal vents on the Galapagos Rift and the South East Pacific Rise
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Burreson, Eugene; Segonzac, Michel.
The deep-sea fish leech Bathybdella sawyeri Burreson has recently been collected from two sites on the South East Pacific Rise at approximately 14 degrees and 17 degrees S, 2623 - 2586 m depth. Leeches were obtained from washings of vent mussels Bathymodiolus thermophilus (Mytilidae) and clams Calyptogena magnifica (Vesicomyidae) collected with a grab by a submersible, or were found attached to the cheliped of the crab Cyanagraea praedator (Bythograeidae) collected in baited traps at 14 S. Most individual leeches had morphology typical of B. sawyeri as originally described, with suckers of approximately equal size, but all specimens collected from the crab C. praedator had unusually large oral suckers that were distinctly larger than the caudal sucker....
Tipo: Text
Palavras-chave: Cyanagraea; Bythograeidae; Bathybdella; Hydrothermal vent; East Pacific Rise; Piscicolidae; Hirudinida.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2049.pdf

Statistiques de pêche du port de La Rochelle - Année 1968
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guichet, Roget; Gueguen, Jacques; Guillou, Alain.
Les résultats présentés ici sont exclusivement ceux des navires français dont les captures, effectuées au large des côtes européennes ont été vendues à La Rochelle : c'est ainsi que nous n'avons récapitulé ni les ventes des chalutiers rochelais qui ont pêché à la fin de l'année en Mauritanie ni celles de chalutiers espagnols arraisonnés. De plus, nous n'avons pas pris en considération les thoniers, les sardiniers, ni certaines unités de très faible tonnage communément appelés "courreauleurs". Ceux-ci pratiquent à la belle saison un chalutage très côtier, et le reste de l'année se livrent à d'autres activités. Comme ils vendent souvent hors criée, leur production est très difficile à suivre ; elle est en outre très réduite.  Nos statistiques concernent...
Tipo: Text
Ano: 1969
URL: http://archimer.ifremer.fr/doc/00060/17076/14587.pdf

South equatorial current of the indian-ocean - a 50-day oscillation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Heywood, Kj; Barton, Ed; Allen, Gl.
Observations of a fifty-day oscillation in the meridional component of the South Equatorial Current in the Western Indian Ocean are presented. Currents measured in 4000 m of water close to the atoll of Aldabra (46-degrees-E, 9-degrees-S) reveal the oscillation throughout the water column to a depth of 3 000 m. Further evidence of the oscillation is presented in shipboard Acoustic Doppler Current Profiler (ADCP) sections and in Coastal Zone Color Scanner (CZCS) imagery. The oscillations are consistent with a zonally propagating Rossby wave caused by shear instability in the zonal flow of the South Equatorial Current.
Tipo: Text
Palavras-chave: 50-DAY OSCILLATION; ROSBBY WAVE; INDIAN OCEAN; CURRENTS; CZCS.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00098/20890/18504.pdf

Multiblock modeling for complex preference study. Application to European preferences for smoked salmon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bougeard, Stephanie; Cardinal, Mireille.
The aim of the paper is to propose an alternative method to external preference mapping for the case of complex data where explanatory variables are organized in meaningful blocks. We propose an innovative method in the multiblock modeling framework, called multiblock Redundancy Analysis. The interest and relevance of this method is illustrated on the basis of a European consumer preference study for cold-smoked salmon. The study aims at explaining six homogeneous clusters of preference with explanatory parameters organized in five thematic blocks related to physico-chemical measurements, microbiological characterization, appearance attributes, odor/flavor characterization and texture descriptors. Overall indexes and graphical displays associated with...
Tipo: Text
Palavras-chave: Multiblock modeling; Multiblock redundancy analysis; External preference mapping; Smoked salmon.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00171/28251/26626.pdf

Selective breeding to improve resistance against summer mortality in the Pacific oyster Crassostrea gigas : results after 3 generations
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boudry, Pierre; Degremont, Lionel; Bedier, Edouard; Samain, Jean-francois.
Summer mortality of adults and juveniles has been reported in the Pacific oyster, Crassostrea gigas, for many years and in several countries. The French multidisciplinary program "Morest" aims to investigate the causes of the summer mortality in Crassostrea gigas. Within this program, we designed multi-site field experiments to assess to what extent genetic variability exists for summer mortality in French populations of C. gigas and to determine whether selective breeding could improve survival.
Tipo: Text
Palavras-chave: Growth; Resistance; Selective breeding; Genetic; Crassostrea gigas; Pacific oyster; Summer mortality.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/acte-3448.pdf

An updated checklist of the marine fish fauna of Reunion Island, South-Western Indian Ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Letourneur, Yves; Chabanet, Pascale; Durville, Patrick; Taquet, Marc; Teissier, Emmanuel; Parmentier, Maurice; Quero, Jean-claude; Pothin, Karine.
The ichthyofauna of Reunion Island, Southwestern Indian Ocean, was sampled during several ecological and artisanal fisheries studies. Information from these investigations and from other sources were included to compile the present checklist of the marine fishes of the island. A total of 885 species belonging to 150 families was recorded. Nine species are known only from Reunion, indicating endemism of about 1.0%. The most speciose families (Labridae, Gobiidae, Serranidae, and Pomacentridae) were also among the most speciose at the neighbouring Mauritius Island (except gobiids), and, generally, on other islands in the Indian Ocean area (Maldives, Chagos, Madagascar and Christmas Island). The Gobiidae only represented 5.4% of the ichthyofauna, which was...
Tipo: Text
Palavras-chave: Biogeography; Checklist; Reunion Island; ISW; Marine ichthyofauna.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-713.pdf

Hydrobiologie du bassin de Marennes-Oléron - Résultats du Réseau National d'Observation : 1977 à 1981
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Heral, Maurice; Razet, Daniel; Deslous-paoli, Jean-marc; Manaud, Francois; Truquet, Isabelle; Garnier, Jacqueline.
After determining the seasonal features of the hydrobiology of the Marennes-Oléron's estuarine complex in 1976 and 1977 (Héral et al, 1983), based on seasonal campaigns conducted in 15 stations sampled in a tide half-cycle, it was proposed to monitor 5 stations spread out over the entire basin (figure 1) as part of the National Observation Network (RNO) with two monthly samples taken, one at neap tide, the other at spring tide. In the same way, station 3, at the centre of the basin, was sampled at tide half-cycle, on the same days but with a special effort to determine the dissolved and particulate organic substances. The goal of this paper is to introduce the results of the RNO's hydrobiological parameters at the stations of the Charente (5) estuary, the...
Tipo: Text
Palavras-chave: Substances organiques particulaires; Substances organiques dissoutes; Marennes Oléron; Hydrobiologie.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/publication-2934.pdf

Peuplements marins du plateau continental ouest et sud armoricain - Notice explicative des cartes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chasse, Claude; Glemarec, Michel.
Une première étude des peuplements benthiques du Plateau Continental Nord-Gascogne nous a permis de présenter une classification des peuplements (M. GLÉMAREC, 1969). Celle-ci est proposée aujourd'hui pour l'ensemble du plateau continental européen Nord-Atlantique, (M. GLÉMAREC, 1973, sous presse). Les peuplements du large de l'Aquitaine (Y. M)NBET, 1972) et ceux intertidaux de C. CHASSÉ pour la Manche et l'Atlantique (1972) peuvent s'y inclure.
Tipo: Text
Ano: 1973
URL: http://archimer.ifremer.fr/doc/00151/26197/24217.pdf

Variance d'estimation géostatistique pour les campagnes acoustiques halieutiques
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rider, Mary.
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00272/38293/36482.pdf

Dynamiques océaniques à petite échelle dans le Bassin du Cap et leur impact sur la circulation régionale
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Capuano, Tonia Astrid.
This study addresses the role of oceanic small-scale processes in the formation and transformation of subsurface waters that participate in the Indo-Atlantic interocean exchange.We focus on the Cape Basin dynamics, characterized by a highly non-linear turbulence.We provide qualitative and quantitative evidence of the direct impact that meso- and submesoscale structures, their dynamical interactions and their seasonal variability have on the local thermocline and intermediate waters. A sequence of numerical simulations, ranging from ’eddy-permitting’ to ’submesoscale resolving’, underlines the importance of an adequate vertical resolution to correctly depict the water masses properties.We point out that Agulhas eddies are mainly generated through baroclinic...
Tipo: Text
Palavras-chave: Processus de méso- et sous-méso- échelle; Échange Indo-Atlantique; Dynamiques des masses d’eau; Meso- and submesoscale processes; Indo-Atlantic exchange; Water masses dynamics.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00497/60903/64251.pdf

Global Carbon Budget 2016
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Quere, Corinne; Andrew, Robbie M.; Canadell, Josep G.; Sitch, Stephen; Korsbakken, Jan Ivar; Peters, Glen P.; Manning, Andrew C.; Boden, Thomas A.; Tans, Pieter P.; Houghton, Richard A.; Keeling, Ralph F.; Alin, Simone; Andrews, Oliver D.; Anthoni, Peter; Barbero, Leticia; Bopp, Laurent; Chevallier, Frederic; Chini, Louise P.; Ciais, Philippe; Currie, Kim; Delire, Christine; Doney, Scott C.; Friedlingstein, Pierre; Gkritzalis, Thanos; Harris, Ian; Hauck, Judith; Haverd, Vanessa; Hoppema, Mario; Goldewijk, Kees Klein; Jain, Atul K.; Kato, Etsushi; Koertzinger, Arne; Landschuetzer, Peter; Lefevre, Nathalie; Lenton, Andrew; Lienert, Sebastian; Lombardozzi, Danica; Melton, Joe R.; Metzl, Nicolas; Millero, Frank; Monteiro, Pedro M. S.; Munro, David R.; Nabel, Julia E. M. S.; Nakaoka, Shin-ichiro; O'Brien, Kevin; Olsen, Are; Omar, Abdirahman M.; Ono, Tsuneo; Pierrot, Denis; Poulter, Benjamin; Roedenbeck, Christian; Salisbury, Joe; Schuster, Ute; Schwinger, Joerg; Seferian, Roland; Skjelvan, Ingunn; Stocker, Benjamin D.; Sutton, Adrienne J.; Takahashi, Taro; Tian, Hanqin; Tilbrook, Bronte; Van Der Laan-luijkx, Ingrid T.; Van Der Werf, Guido R.; Viovy, Nicolas; Walker, Anthony P.; Wiltshire, Andrew J.; Zaehle, Soenke.
Accurate assessment of anthropogenic carbon dioxide (CO2) emissions and their redistribution among the atmosphere, ocean, and terrestrial biosphere - the "global carbon budget" - is important to better understand the global carbon cycle, support the development of climate policies, and project future climate change. Here we describe data sets and methodology to quantify all major components of the global carbon budget, including their uncertainties, based on the combination of a range of data, algorithms, statistics, and model estimates and their interpretation by a broad scientific community. We discuss changes compared to previous estimates and consistency within and among components, alongside methodology and data limitations. CO2 emissions from fossil...
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00383/49401/49899.pdf

Alimentation et déterminisme environnemental de la reproduction des huîtres perlières P. margaritifera sur l'atoll d'Ahe (Archipel des Tuamotu, Polynésie française)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fournier, Jonathan.
While pearl culture industry represents one of the dominant business sector of French Polynesia, it still entirely relies on natural reproduction and spat collection. A better knowledge of reproduction determinism is thus of particular interest for the black lip pearl oyster P. margaritifera. This work is based (i) on in situ studies of the pearl oyster diet and of the environmental determinism of reproduction; and (ii) on the application to the black lip pearl oyster of a bio-energetic and deterministic model of growth and reproduction based on the Dynamic Energy Budget theory. In Ahe atoll lagoon, plankton concentration and composition fluctuations were strongly linked to wind regimes. These variations had a great impact on the diet of pearl oysters...
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00074/18533/16077.pdf

The identification of genes from the oyster Crassostrea gigas that are differentially expressed between progeny exhibiting opposed susceptibility to summer mortality
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Huvet, Arnaud; Degremont, Lionel; Labreuche, Yannick; Daniel, Jean-yves; Dubrunfaut, Thomas; Boudry, Pierre; Haure, Joel; Bedier, Edouard; Ropert, Michel; Herpin, Amaury; Cunningham, Charles; Moal, Jeanne; Samain, Jean-francois.
Summer mortality associated with juveniles of the oyster Crassostrea gigas is the result of a complex interaction between the host, pathogens and environment. Divergent selection based on summer survival have been applied to produce families with resistant and susceptible progeny. Here, we describe the use of suppression subtractive hybridization to generate 150 clones that were differentially regulated between resistant and susceptible F2 progeny. The nucleotide sequence of these 150 clones was determined. Among the 25 unique sequences that matched with the products of known genes, those putatively implicated in energy generation (12%) and immune function (16%), systems suspected to be implicated in summer mortality, were extended and analyzed by real...
Tipo: Text
Palavras-chave: Selection; Gene; Genetic; Summer mortality; Crassostrea gigas; Pacific oysters.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/acte-3447.pdf

Dynamique de l'upwelling et variabilité spatio-temporelle de la répartition de la sardine marocaine, Sardina pilchardus (Walbaum, 1792)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kifani, S; Gohin, Francis.
A space-time approach is adopted in an attempt to understand changes in the availability of the central sardine stock along the northwestern Moroccan coast. The warming observed in 1987 and 1989, due to the decline in wind activity, seems to have some repercussions on sardine distribution. The decrease in upwelling activity seems to have favoured concentration in the vicinity of Safi, and thus rendered the sardines more vulnerable to the purse-seiners of this port. We seek to explain the failure of the link established by Belveze and Erzini (1983) between sardine availability and upwelling activity in thc northern area. Two hypotheses, taking into account the local hydrology or the tendency of pelagic species to aggregate in time and space, have been put...
Tipo: Text
Palavras-chave: UPWELLING; MOROCCO; SARDINE; SEA SURFACE TEMPERATURE.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00100/21151/18770.pdf

Two examples of nutritional pathology related to vitamins E and C deficiencies
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Baudin Laurencin, F; Messager, J; Stephan, Gwendal.
Symptoms recalling a nutritional pathology and more precisely a process of lipid peroxydation were observed during the last years in seabass Dicentrarchus labrax and other fishes cultured in tropical marine condition, Ocyurus chrysurus and Lutjanus analis . They included dark coloration, skin ulceration, lethargy, anorexy, emaciation. Histological examinations showed hepatic fatty degenerative lesions, pancreatitis, muscular degeneration and retinal atrophy. Additional vitamins E and C in the food suppressed that pathological symptoms. The previously evoked clinical or histological signs were not achieved in spite of an increase of the level of hepatic, muscular or blood malondialdehyde and of the conjugated dienes of the perivisceral fat. In the same...
Tipo: Text
Palavras-chave: Lutjanus analis; Ocyurus chrysurus; Dicentrarchus labrax; Pisces; Marine fish; Diseases; Nutrient deficiency; Vitamin C; Vitamin E; Vitamin deficiencies; Nutritional requirements; Dietary deficiencies; Deficiency diseases.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1501.pdf

Hydrologie saisonniere du Golfe du Lion (travaux de f « ichthys » (1966-1967)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tournier, Henri.
The Ichthys, a research ship of the Institute of Maritime Fishing's laboratory at Sète, conducted 11 hydrological campaigns from February 1966 to December 1967, each one of them including 25 stations distributed throughout the Gulf of Lion from the coast to a depth of 100 metres (figure 1). The plankton catches performed at each station and locating the schools of fish by depth sensor have already allowed us to bring to light the correlation that exists between environmental conditions and sardine egg laying (LEE, PARK, TOURNIER and ALDEBERT, 1967). This research consists in making use of the data collected by the Ichthys on temperature and salinity. It ensues from that of FURNESTIN (1960), FURNESTIN and ALLAIN (1962) and ALLAIN and FURNESTIN (1969). The...
Tipo: Text
Ano: 1969
URL: http://archimer.ifremer.fr/doc/1969/publication-3178.pdf

Estimation, Préservation, Reconstitution des bancs sauvages d’huîtres plates en Baie de Quiberon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cochet, Hélène; Pouvreau, Stephane; Tanguy, Ludovic; Kerisit, Christophe.
L’huître plate, Ostrea edulis, est l’huître native des côtes européennes. Espèce emblématique de Bretagne, elle a subi deux épizooties successives dans les années 70 qui ont fait chuter sa production de 20 000 tonnes à moins de 2000 tonnes actuellement et disparaître de nombreux bancs naturels. Désormais l’espèce ne se reproduit plus que dans quelques baies et rias situées principalement en Bretagne et Normandie et le captage ne se pratique qu’en Baie de Quiberon et en Rade de Brest. Mais ce dernier est très variable d’une année à l’autre et a été particulièrement faible en Baie de Quiberon depuis 2010. De récentes études ont conclu que la diminution des stocks d’huîtres, notamment des bancs naturels de l’Ouest de la baie, pouvait être l’une des raisons à...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00304/41488/40700.pdf

Etude expérimentale de la rétention et du tri particulaire chez Crassostrea gigas : utilisation de régimes alimentaires monospécifiques composés d'Haslea ostrearia
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Barille, Laurent.
L'aquaculture extensive de l'huitre japonaise Crassostrea gigas représente, avec 130 000 tonnes par an, la première ressource marine nationale (Heral, 1986). Le bassin de Marennes-Oléron, qui compte pour 40 %  dans cette production, enregistre depuis vingt ans un ralentissement de la croissance des huîtres. La capacité trophique du bassin, production du phytoplancton et apport organique, ne permettrait pas une production optimale compte tenu du stock de mollusques actuel (Heral et al., 1990). Une partie de la réponse passe par une meilleure compréhension de l'adaptation trophique de Crassotrea gigas soumise dans ce milieu estuarien, à des variations marquées de la qualité et de la quantité de la nourri ture disponible. Dans le but de mieux comprendre les...
Tipo: Text
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00441/55211/56681.pdf

The contrasted evolutionary fates of deep-sea chemosynthetic mussels (Bivalvia, Bathymodiolinae)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thubaut, Justine; Puillandre, Nicolas; Faure, Baptiste; Cruaud, Corinne; Samadi, Sarah.
Bathymodiolinae are giant mussels that were discovered at hydrothermal vents and harboring chemosynthetic symbionts. Due to their close phylogenetic relationship with seep species and tiny mussels from organic substrates, it was hypothesized that they gradually evolved from shallow to deeper environments, and specialized in decaying organic remains, then in seeps, and finally colonized deep-sea vents. Here, we present a multigene phylogeny that reveals that most of the genera are polyphyletic and/or paraphyletic. The robustness of the phylogeny allows us to revise the genus-level classification. Organic remains are robustly supported as the ancestral habitat for Bathymodiolinae. However, rather than a single step toward colonization of vents and seeps,...
Tipo: Text
Palavras-chave: Bathymodiolinae; Chemosynthetic ecosystem; Deep-sea; Evolution.
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00218/32957/31622.pdf

Atouts et contraintes de la conchyliculture normande - 2. La Côte Est du Cotentin
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kopp, Joel; Joly, Jean-pierre; Legagneur, Eric; Ruelle, Francois.
Grâce à une approche multidisciplinaire, ce document constitue la synthèse des connaissances acquises depuis 3 ans sur la filière conchylicole active le long de la côte Est du Cotentin (huîtres creuses et moules). Les différents aspects positifs, les contraintes et les difficultés physiques. administratives, sociales, économiques et biologiques qui caractérisent cette activité ont été abordés tour à tour. Leurs synergies et leurs évolutions ont été analysées pour proposer les mesures de gestion réalistes et efficaces les plus adaptées aux situations actuelle et future. C'est ainsi que les caractères généraux très favorables des conditions d'exploitation ont été mis en évidence, tant au plan physique (largeur de l'estran, dureté du sol le plus souvent...
Tipo: Text
Palavras-chave: Ostréiculture; Mytiliculture; Estimation des stocks; Croissance; Socio-économie; Typologie des entreprise; Normandie; Cotentin.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00092/20370/18032.pdf

Fragmentation des populations naturelles d'Ostrea edulis: une adaptation locale de l'huître plate européenne
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Harrang, Estelle; Bierne, Nicolas; Heurtebise, Serge; Morga, Benjamin; Lapegue, Sylvie.
L'huître plate européenne Ostrea edulis a connu une période faste dans l'aquaculture jusqu'à la fin des années 1960, lorsque deux parasites, Marteilia refringens (1969) et Bonamia ostreae (1979), ont successivement décimé les bancs naturels de cette espèce endémique, déjà affaiblis par la sur-exploitation de ses gisements. Historiquement présente sur toute la côte européenne, de la Mer du Nord à la Mer Méditerranée, en passant par l'Océan Atlantique, la Mer Adriatique et la Mer Noire, les bancs naturels de cette espèce sont devenus très localisés, laissant penser à des phénomènes d'adaptation locale de l'huître vis à vis de son environnement biotique et abiotique.  La diversité et la structuration génétique de plusieurs populations de l'espèce, à l'échelle...
Tipo: Text
Palavras-chave: Huître plate; Ostrea edulis; Génétique des populations; Sélection Génétique.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00014/12547/9417.pdf

Impact of dust addition on the metabolism of Mediterranean plankton communities and carbon export under present and future conditions of pH and temperature
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gazeau, Frédéric; Van Wambeke, France; Maranon, Emilio; Perez-lorenzo, Maria; Alliouane, Samir; Stolpe, Christian; Blasco, Thierry; Leblond, Nathalie; Zancker, Birthe; Engel, Anja; Marie, Barbara; Dinasquet, Julie; Guieu, Cécile.
Although atmospheric dust fluxes from arid as well as human-impacted areas represent a significant source of nutrients to surface waters of the Mediterranean Sea, studies focusing on the evolution of the metabolic balance of the plankton community following a dust deposition event are scarce and none were conducted in the context of projected future levels of temperature and pH. Moreover, most of the experiments took place in coastal areas. In the framework of the PEACETIME project, three dust-addition perturbation experiments were conducted in 300-L tanks filled with surface seawater collected in the Tyrrhenian Sea (TYR), Ionian Sea (ION) and in the Algerian basin (FAST) onboard the R/V “Pourquoi Pas?” in late spring 2017. For each experiment, six tanks...
Tipo: Text
Palavras-chave: Mediterranean Sea; Atmospheric deposition; Plankton community metabolism; Carbon export; Ocean acidification; Ocean warming.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00688/79967/82900.pdf

Production and certification of candidate Pb delta-iCRMs ERM-3800 and ERM-3810 series
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ponzevera, Emmanuel; Quetel, Christophe R.; Hendrickx, Frans; Fortunato, Giuseppino.
This paper describes the preparation of a new type of Pb delta-isotopic Certified Reference Materials (delta-iCRMs), available in liquid form (Pb mass fraction similar to 100 mu g g(-1), 2 mL, 3% HNO3) to prevent the risk of insufficient isotopic homogeneity. These materials are intended for the validation of delta-scale isotope ratio measurements, and come in four pairs. The quantities certified are the relative differences on values of n(Pb-207)/n(Pb-204), n(Pb-207)/n(Pb-206) and n(Pb-207)/n(Pb-208) ratios between the members of each pair. There is a material with similar to natural Pb-isotopic composition (ERM-3800, delta-0 material), common to all pairs, and the same similar to natural Pb progressively enriched in Pb-207 (ERM-3810 series). Pairs I to...
Tipo: Text
Ano: 2009

Coherent Response of Antarctic Intermediate Water and Atlantic Meridional Overturning Circulation During the Last Deglaciation: Reconciling Contrasting Neodymium Isotope Reconstructions From the Tropical Atlantic
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gu, Sifan; Liu, Zhengyu; Zhang, Jiaxu; Rempfer, Johannes; Joos, Fortunat; Oppo, Delia W.
Antarctic Intermediate Water (AAIW) plays important roles in the global climate system and the global ocean nutrient and carbon cycles. However, it is unclear how AAIW responds to global climate changes. In particular, neodymium isotopic composition (epsilon(Nd)) reconstructions from different locations from the tropical Atlantic have led to a debate on the relationship between northward penetration of AAIW into the tropical Atlantic and the Atlantic meridional overturning circulation (AMOC) variability during the last deglaciation. We resolve this controversy by studying the transient oceanic evolution during the last deglaciation using a neodymium-enabled ocean model. Our results suggest a coherent response of AAIW and AMOC: when AMOC weakens, the...
Tipo: Text
Palavras-chave: AAIW; AMOC; Deglacial; Neodymium isotope; Paleocirculation tracer.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00495/60709/65334.pdf

Consequences des recents changements de maillage sur les rendements de la flotille langoustiniere lorientaise en Mer Celtique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Morizur, Yvon; Charuau, Anatole.
Some trawlers from Lorient (France) are fishing for Nephrops at the North of 48th parallel. During the last years, the mesh size of their cod-end changed twice. It increased from 45 mm to 60 mm at the end of year 1978 and to 70 mm at the end of year 1979.'. Whereas the change to 60 mm seems to have no immediate- effect on Nephrops landings, the increase from 60 mm to 70 mm results in a loss in Nephrops landings of 30-40 %. That loss in Nephrops landings goes with an increase in some by-catches species as whiting, cod and hake.
Tipo: Text
Palavras-chave: ANE; Celtic Sea Nephrops Malacostraca Catch statistics Crustacean fisheries Yield Fishery management Mesh regulations.
Ano: 1981
URL: http://archimer.ifremer.fr/doc/1981/acte-2345.pdf

Larval connectivity of pearl oyster through biophysical modelling; evidence of food limitation and broodstock effect
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thomas, Yoann; Dumas, Franck; Andrefouet, Serge.
The black-lip pearl oyster (Pinctada margaritifera) is cultured extensively to produce black pearls, especially in French Polynesia atoll lagoons. This aquaculture relies on spat collection, a process that experiences spatial and temporal variability and needs to be optimized by understanding which factors influence recruitment. Here, we investigate the sensitivity of P. margaritifera larval dispersal to both physical and biological factors in the lagoon of Ahe atoll. Coupling a validated 3D larval dispersal model, a bioenergetics larval growth model following the Dynamic Energy Budget (DEB) theory, and a population dynamics model, the variability of lagoon-scale connectivity patterns and recruitment potential is investigated. The relative contribution of...
Tipo: Text
Palavras-chave: Pearl oyster; Lagoon; Biophysical modelling; Connectivity; Population dynamics; DEB model.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00321/43192/42926.pdf

Numerical and experimental study of a continuous electrostatic smoking process
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Baron, Regis; Havet, Michel; Solliec, Camille; Pierrat, Daniel; Touchard, Gerard.
The smoking process is a batch one with long duration processing (some hours). Deposition of smoke particles can be enhanced by electrostatic precipitation. However, a better knowledge of the fundamental physics is needed to optimize the process. We carried out experimental and numerical studies to obtain essential information on the smoke flow. First, experiments physically characterized the wood smoke. These measures lead us to study the turbulent two-phase flow using an algebraic slip model. The main coupling with electrical forces is taken into account through the slip velocity. Various assumptions were tested concerning the coupled phenomena in order to build an algorithm that is able to simulate these phenomena. Numerical resolutions are compared...
Tipo: Text
Palavras-chave: Smoked salmon; Smoke particles; Electrostatic precipitators.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4695.pdf

The impact of internal waves on upper continental slopes: insights from the Mozambican margin (SW Indian Ocean)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Miramontes, Elda; Jouet, Gwenael; Thereau, Estelle; Bruno, Miguel; Penven, Pierrick; Guerin, Charline; Le Roy, Pascal; Droz, Laurence; Jorry, Stephan; Hernández‐molina, F. Javier; Thiéblemont, Antoine; Silva Jacinto, Ricardo; Cattaneo, Antonio.
Evidences of sedimentation affected by oceanic circulation, such as nepheloid layers and contourites are often observed along continental slopes. However, the oceanographic processes controlling sedimentation along continental margins remain poorly understood. Multibeam bathymetry and high‐resolution seismic reflection data revealed a contourite depositional system in the Mozambican upper continental slope composed of a contourite terrace (a surface with a gentle seaward slope dominated by erosion) and a plastered drift (a convex‐shape sedimentary deposit). A continuous alongslope channel and a field of sand dunes (mainly migrating upslope), formed during Holocene, were identified in the contourite terrace at the present seafloor. Seismic reflection data...
Tipo: Text
Palavras-chave: Contourite; Sediment drift; Bedform; Sedimentary processes; Tide; Internal solitary waves; Bottom currents.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00605/71730/70205.pdf

Rapport de campagne de nourriceries côtières : Campagne Nurse 2017
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Brind'Amour, Anik; Le Bris, Hervé; Delaunay, Damien; Berthele, Olivier; Baudrier, Jerome.
Dans le cadre de la mise en œuvre du programme de surveillance de la directive cadre stratégie pour le milieu marin (DCSMM), le suivi des poissons et céphalopodes démersaux des milieux meubles côtiers a été jugé prioritaire. Pour ce faire, une série de campagnes halieutiques récurrentes a été déployée dans les nourriceries côtières, constituant des habitats essentiels pour de nombreuses espèces marines. La caractérisation de l’état écologique des peuplements et l’étude de la fonctionnalité des habitats de nourriceries s’avèrent nécessaires au calcul des indicateurs du Bon Etat Ecologique requis par la DCSMM et primordiales pour la mise en place de mesures de gestion écosystémique garantissant des usages durables. La campagne Nurse conduite dans le golfe de...
Tipo: Text
Palavras-chave: Fonctionnement des nourriceries côtières; Suivi; Dynamique temporelle; Communautés bentho-démersales; DCSMM.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00482/59384/62147.pdf

Seasonality in marine ecosystems: Peruvian seabirds, anchovy, and oceanographic conditions
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Passuni, Giannina; Barbraud, Christophe; Chaigneau, Alexis; Demarcq, Herve; Ledesma, Jesus; Bertrand, Arnaud; Castillo, Ramiro; Perea, Angel; Mori, Julio; Viblanc, Vincent A.; Torres-maita, Jose; Bertrand, Sophie.
In fluctuating environments, matching breeding timing to periods of high resource availability is crucial for the fitness of many vertebrate species, and may have major consequences on population health. Yet, our understanding of the proximate environmental cues driving seasonal breeding is limited. This is particularly the case in marine ecosystems, where key environmental factors and prey abundance and availability are seldom quantified. The Northern Humboldt Current System (NHCS) is a highly productive, low-latitude ecosystem of moderate seasonality. In this ecosystem, three tropical seabird species (the Guanay Cormorant Phalacrocorax bougainvillii, the Peruvian Booby Sula variegata, and the Peruvian Pelican Pelecanus thagus) live in sympatry and prey...
Tipo: Text
Palavras-chave: Anchovy; Engraulis ringens; Guanay Cormorant; Northern Humboldt Current System; Occupancy model; Oceanographic variability; Pelecanus thagus; Peru; Peruvian Booby; Peruvian Pelican; Phalacrocorax bougainvillii; Prey abundance; Seasonal breeding; Sula variegata.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00317/42844/74394.pdf

First Release of the SeaDataNet Aggregated Data Sets Products
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Simoncelli, Simona; Tonani, Marina; Grandi, Alessandro; Coatanoan, Christine; Myroshnychenko, Volodymyr; Sagen, Helge; Bäck, Örjan; Scory, Serge; Schlitzer, Reiner; Fichaut, Michele.
The document describes the procedure implemented for the generation of the SeaDataNet 2 versions of the aggregated products. Detailed descriptions of the data sets par sea region (Mediterranean Sea, Black Sea, Arctic Sea, Baltic Sea, North Sea and the North Atlantic Ocean) are given with the general description of the dataset, the data quality assessment procedure and results.  
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00387/49827/50411.pdf

Turbidite chronostratigraphy off Algiers, central Algerian margin: A key for reconstructing Holocene paleo-earthquake cycles
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Babonneau, Nathalie; Cattaneo, Antonio; Ratzov, Gueorgui; Deverchere, Jacques; Yelles-chaouche, Abdelkarim; Lateb, Tassadit; Bachir, Roza Si.
Northern Algeria is threatened by moderate to large magnitude earthquakes resulting from the slow convergence between the African and European plates. Main active faults are located offshore along the Algerian coast, as exemplified by the 2003 Mw 6.9 Boumerdès earthquake. This event triggered numerous and widespread turbidity currents over ∼ 150 km along strike in the Algerian basin (reaching 2800 m of water depth) and demonstrates the multi-source and multi-path characteristics of earthquake-triggered turbidity flows along this margin segment.  We rely on the sedimentological analysis of five cores located at the toe of the Algiers margin, close to the 2003 cable break sites, to explore the potential for Holocene turbidite paleoseismology. Radiocarbon...
Tipo: Text
Palavras-chave: Algerian margin; Marine paleoseismology; Turbidite; Holocene.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00356/46701/46563.pdf

Campagne FARE: Wireline reentry of DSDP Hole 396B using the NADIA System
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Legrand, Jacques; Echardour, Andre; Floc'H, Henri; Floury, Luc; Gieskes, Joris; Harmegnies, Francois; Loaec, Gerard; Pozzi, Jean-pierre; Raer, Yves; Stephen, Ralph.
This paper describes the successful field test of the NADIA (Navette de Diagraphie, which means logging shuttle) wireline reentry system, an apparatus designed and built by IFREMER (Institut Francaise de Recherche pour l'Exploitation de la Mer) to place instruments and to carry out well logging in boreholes in the deep sea without a drill ship. The Campagne FARE (Faisabilite Re‐Entree) field tests in July 1988 in DSDP (Deep Sea Drilling Project) Hole 396B (near the Kane Fracture Zone at the Mid‐Atlantic Ridge (Figure 1)) demonstrated the feasibility of routine reentry and logging in a water depth of 4455 m.
Tipo: Text
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00451/56268/57839.pdf

Global trends in surface ocean pCO(2) from in situ data
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fay, A. R.; Mckinley, G. A.
Ocean carbon uptake substantially reduces the rate of anthropogenic carbon accumulation in the atmosphere and thus slows global climate change. In the interest of understanding how this ocean carbon sink has responded to climate variability and climate change in recent decades, trends in globally observed surface ocean partial pressure of CO2 (pCO(2)(s.ocean)) are evaluated over 16 gyre-scale biomes covering the globe. pCO(2)(s.ocean) trends have been of variable magnitude and sensitive to the chosen start and end years. On longer time frames, several regions of the tropics and subtropics display pCO(2)(s.ocean) trends that are parallel to or shallower than trends in atmospheric pCO(2), consistent with the ocean's long-term response to carbon accumulation...
Tipo: Text
Palavras-chave: Climate change; Surface ocean pCO(2); Carbon trends.
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00253/36407/34946.pdf

Intercomparison of dissolved iron isotope profiles from re-occupation of three GEOTRACES stations in the Atlantic Ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Conway, T. M.; John, S. G.; Lacan, F.
Intercomparison of trace metal data is a key aspect of the International GEOTRACES program, allowing data from multiple laboratories and countries to be combined to produce high-resolution datasets for the oceans. The use of crossover stations by the GEOTRACES program provides the opportunity both for comparison of analytical techniques and assessment of temporal variability in the cycling of trace metals such as iron (Fe). Here, we present the first comparison of dissolved Fe stable isotope ratio (δ56Fe; relative to IRMM-014) profiles in the oceans, from re-occupations of three locations in the Atlantic Ocean; (1) the Bermuda Atlantic Time Series Station (31.75°N 64.17°W) during the U.S. GEOTRACES IC1 cruise (June 2008) and the U.S. GEOTRACES GA03 cruise...
Tipo: Text
Palavras-chave: Trace metals; GEOTRACES; Biogeochemistry; Intercomparison.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00332/44330/43932.pdf

Global wave height trends and variability from new multi-mission satellite altimeter products, reanalyses and wave buoys
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Timmermans, B.w.; Gommenginger, C.p.; Dodet, Guillaume; Bidlot, J.-r.
Long‐term changes in ocean surface waves are relevant to society and climate research. Significant wave height climatologies and trends over 1992‐2017 are intercompared in four recent high‐quality global datasets using a consistent methodology. For two products based on satellite altimetry, including one from the European Space Agency Climate Change Initiative for Sea State, regional differences in mean climatology are linked to low and high sea states. Trends from the altimetry products, and two reanalysis and hindcast datasets, show general similarity in spatial variation and magnitude but with major differences in equatorial regions and the Indian Ocean. Discrepancies between altimetry products likely arise from differences in calibration and quality...
Tipo: Text
Palavras-chave: Sea state; Wave height; Trends; Altimetry; Satellite wave observations; Dataset intercomparison.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00622/73371/72562.pdf

La rivière Seudre : intégration des données relatives au bassin versant de la Seudre dans un système d'information géographique - Cartographie thématique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Giraud, Sophie.
Tipo: Text
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00304/41550/40758.pdf

High modulus carbon fibre composites: Correlation between transverse tensile and mode I interlaminar fracture properties
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Baral, N; Guezenoc, H; Davies, Peter; Baley, C.
This paper presents test results from mode I interlaminar fracture and transverse tensile tests on unidirectional carbon/epoxy composites used in racing yacht construction. Fibre modulus has been varied from 380 to 640 GPa. PAN fibre reinforced composite properties, delamination resistance (G(Ie) and G(Ip)) and transverse strain to failure, decrease as fibre modulus increases. Composites based on the highest modulus pitch fibres show higher transverse failure strains than the highest modulus PAN fibre composites. A distinct failure mechanism, crack propagation within the fibres, was observed for the pitch based reinforcement. The transverse tensile tests allowed transverse fibre modulus to be estimated as 11.5 GPa for the PAN and 9 GPa for the pitch...
Tipo: Text
Palavras-chave: Carbon fibre; Fracture; Deformation; Delamination; Composite materials.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-3723.pdf

Performance report of the RHUM-RUM ocean bottom seismometer network around La Réunion, western Indian Ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Stähler, S. C.; Sigloch, K.; Hosseini, K.; Crawford, W. C.; Barruol, G.; Schmidt-aursch, M. C.; Tsekhmistrenko, M.; Scholz, J.-r.; Mazzullo, A.; Deen, M.
RHUM-RUM is a German-French seismological experiment based on the sea floor surrounding the island of La Réunion, western Indian Ocean (Barruol and Sigloch, 2013). Its primary objective is to clarify the presence or absence of a mantle plume beneath the Reunion volcanic hotspot. RHUM-RUM's central component is a 13-month deployment (October 2012 to November 2013) of 57 broadband ocean bottom seismometers (OBS) and hydrophones over an area of 2000  ×  2000 km2 surrounding the hotspot. The array contained 48 wideband OBS from the German DEPAS pool and 9 broadband OBS from the French INSU pool. It is the largest deployment of DEPAS and INSU OBS so far, and the first joint experiment.  This article reviews network performance and data quality: of the 57...
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00312/42292/41624.pdf

Distribution de Mytilicola intestinalis steuer le long des côtes françaises
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Brienne, H; Pairain, R.
Lorsqu'en 1950 une mortalité importante a affecté presque tous les parcs à moules de la Zélande, des examens ont été faits pour déceler la présence de Mytilicola intestinalis Steuer dans les moules des gisements naturels et des parcs de culture du littoral français. A cette époque, trois secteurs étaient fortement infestés :  les gisements de la Normandie;  les parcs et gisements de la côte de la Bretagne Ouest et Sud;  les parcs du littoral méditerranéen.  Beaucoup de zones mytilicoles en étaient indemnes ; d'autres en renfermaient des quantités variables.
Tipo: Text
Ano: 1966
URL: http://archimer.ifremer.fr/doc/1966/publication-7261.pdf

Surface salinity drifters for SMOS validation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Morisset, S.; Reverdin, Gilles; Boutin, Jacqueline; Martin, N.; Yin, X.; Gaillard, Fabienne; Blouch, Pierre; Rolland, J.; Font, J; Salvador, J.
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00114/22552/20240.pdf

L'aspartate transcarbamylase, indice de croissance des organismes marins : perspectives et limites
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bergeron, Jean-pierre.
Measurements of aspartate transcarbamylase activity (ATC) are applied to the research of a growth index for marine organisms. The investigations were performed on laboratory reared animals (Artemia salina, fish larvae) and on wild animals sampled in their natural environment (scallop Pecten maximus, intertidal and holoplanktonic crustaceans).
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1981
URL: http://archimer.ifremer.fr/doc/1981/publication-5971.pdf

Surveillance Ecologique du site du Blayais - année 2013
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Quintin, Jean-yves; Sottolichio, Aldo; Derriennic, Herve; Schmidt, Sabine; Mallet, Céline; Agion, Tony; Sautour, Benoit; Parra, René; Dindinaud, François; Bachelet, Guy; Leconte, Michel.
Monitoring n° 36 of the BLAYAIS nuclear power plant takes into account studies conducted between April and November 2013. Physicochemistry, Bathymetry, Hydrobiology, Bacteriology, Zooplankton, Benthic macrofauna, are reported.
Tipo: Text
Palavras-chave: Centrale nucléaire – Estuaire de la Gironde – Surveillance; Pelagos; Physico chimie – Bathymétrie; Hydrologie; Microbiologie – Zooplancton – Macrofaune benthique.; Nuclear power plant – Gironde estuary – Monitoring; Pelagos; Physico chemistry – Bathymetry; Hydrology – Microbiology; Zooplankton – Benthic macrofauna.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00242/35306/33825.pdf

Thermal Ecology and Physiology of an Intertidal Predator-Prey System: Pisaster Ochraceus and Mytilus Californianus
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Monaco, Cristian.
Untangling natural systems’ complexity requires understanding the mechanisms responsible for organisms’ responses to environmental change. Recently, significant advances have been made by recognizing the relevance of direct and indirect effects, which take place when multiple biotic and abiotic factors influence each other. I examined potential direct effects of environmental variables on a predator-prey interaction, as well as potential indirect effects of these variables on the interaction itself. I placed emphasis on behavioral and physiological adaptations, which would potentially contribute/modify these effects. My study system was comprised of a rocky intertidal keystone predator, the sea star Pisaster ochraceus, and its main prey the mussel Mytilus...
Tipo: Text
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00605/71705/70149.pdf

Conséquences génétiques de la production de larves d'huîtres en écloserie : étude des processus de dérive et de sélection
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Taris, Nicolas; Sauvage, Christopher; Batista, Frederico; Baron, Sophie; Ernande, Bruno; Haffray, Pierrick; Boudry, Pierre.
Previous studies have shown heritable variation in larval developmental traits in the Pacific oyster Crassostrea gigas. In order to study the genetic consequences of production of oyster larvae in hatcheries, two factors, specific to hatcheries, were examined: the effect of discarding the smallest larvae (i.e. culling) and the effect of temperature (20°C versus 26°C). A mixed-family approach was used in order to infer the genetic composition of larval populations and family assignment, limiting possible environmental bias and allowing the study of a relatively large number of families using a limited number of larval tanks. Our results show that three multiplexed highly polymorphic microsatellite markers are a powerful tool for family assignment and,...
Tipo: Text
Palavras-chave: Hatchery; Genetic diversity; Selection domestication; Larvae; Crassostrea gigas; Ecloserie; Diversité génétique; Sélection domestication; Larve; Crassostrea gigas.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/acte-1505.pdf

First observations of deep-sea coral reefs along the Angola margin
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Guilloux, E.; Olu, Karine; Bourillet, Jean-francois; Savoye, Bruno; Iglesias, S. P.; Sibuet, Myriam.
The West African continental slope is an important theatre for geological survey prospecting and drilling for hydrocarbons but little is known about local deep-sea biological communities at these depths. While shallow-water reefs are common and well-known features in the tropics, only few records of deep-water corals exist at low latitudes, and most of them have been reported by historical oceanographic cruises undertaking circum-navigations of the world. This study, based on a multi-disciplinary approach, presents a description of newly discovered deep-water coral reef communities along the Angola margin. Data from ROV, multibeam bathymetry, side-scan sonar and seismics from a deep-towed acoustic system (SAR) were used to describe the morphology of the...
Tipo: Text
Palavras-chave: Lucinids; Habitat mapping; ROV; Lophelia pertusa; Deep sea corals; Angola margin.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-7403.pdf

Interglacial instability of North Atlantic Deep Water ventilation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Galaasen, Eirik Vinje; Ninnemann, Ulysses S.; Kessler, Augustin; Irvalı, Nil; Rosenthal, Yair; Tjiputra, Jerry; Bouttes, Nathaëlle; Roche, Didier M.; Kleiven, Helga (kikki) F.; Hodell, David A.
Disrupting North Atlantic Deep Water (NADW) ventilation is a key concern in climate projections. We use (sub)centennially resolved bottom water δ13C records that span the interglacials of the last 0.5 million years to assess the frequency of and the climatic backgrounds capable of triggering large NADW reductions. Episodes of reduced NADW in the deep Atlantic, similar in magnitude to glacial events, have been relatively common and occasionally long-lasting features of interglacials. NADW reductions were triggered across the range of recent interglacial climate backgrounds, which demonstrates that catastrophic freshwater outburst floods were not a prerequisite for large perturbations. Our results argue that large NADW disruptions are more easily achieved...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00663/77524/79329.pdf

Ecophysiologie de la reproduction chez l'huître creuse, Crassostrea gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pouvreau, Stephane; Lepennec, M.
The reproductive cycle of Megathura crenulata was documented and quantification of oocyte lipid reserves with lipo-specific stains was explored in both this species and in Crassostrea gigas. The necessity of providing food to female broodstock C. gigas in spring was re-evaluated, because subsequent larval and post-larval rearing performance was not affected by broodstock starvation during conditioning. Developmental study of the organs responsible of particle processing in C. gigas allowed the identification of critical stages related to the ontogenesis of each organ, as well as a better understanding of the evolution of these organs, highly-modified in the Ostreidae. Ciliary type identification and mucocyte mapping from post-larval to adult stage showed...
Tipo: Text
Palavras-chave: Mucocytes; Mantle; Gill; Larvae postlarvae juveniles; Feeding; Crassostrea gigas; Megathura crenulata; Development; Reproduction; Mucocytes; Manteau; Branchie; Larves post larves juvéniles; Alimentation; Crassostrea gigas; Megathura crenulata; Développement; Reproduction.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/rapport-1867.pdf

Mg∕Ca, Sr∕Ca and stable isotopes from the planktonic foraminifera T. sacculifer: testing a multi-proxy approach for inferring paleotemperature and paleosalinity
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dissard, Delphine; Reichart, Gert Jan; Menkes, Christophe; Mangeas, Morgan; Frickenhaus, Stephan; Bijma, Jelle.
Over the last decades, sea surface temperature (SST) reconstructions based on the Mg∕Ca of foraminiferal calcite have frequently been used in combination with the δ18O signal from the same material to provide estimates of the δ18O of water (δ18Ow), a proxy for global ice volume and sea surface salinity (SSS). However, because of error propagation from one step to the next, better calibrations are required to increase the accuracy and robustness of existing isotope and element to temperature proxy relationships. Towards that goal, we determined Mg∕Ca, Sr∕Ca and the oxygen isotopic composition of Trilobatus sacculifer (previously referenced as Globigerinoides sacculifer) collected from surface waters (0–10 m) along a north–south transect in the eastern basin...
Tipo: Text
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00677/78884/81200.pdf

Etude océanographique appliquée au S.A.U.M. de la rade de Brest
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pommepuy, M.; Manaud, F.; Monbet, Y.; Allen, G.; Salomon, Jean-claude; Gentien, P.; L''Yavang, J.
An oceanographic survey of the bay of Brest (France) was conducted in 1977, together with an hydrological study of the rivers entering the bay. Samples were collected from rivers. Analysis of dissolved nutrients (nitrate, phosphate, ammonium, reactive silicate) and tentative solute budjets (observed and calculated) for nitrogen and phosphorous in drainage basin were performed.
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/publication-6014.pdf

Assessing the relationships between phylogenetic and functional singularities in sharks (Chondrichthyes)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cachera, Marie; Le Loc'H, Francois.
The relationships between diversity and ecosystem functioning have become a major focus of science. A crucial issue is to estimate functional diversity, as it is intended to impact ecosystem dynamics and stability. However, depending on the ecosystem, it may be challenging or even impossible to directly measure ecological functions and thus functional diversity. Phylogenetic diversity was recently under consideration as a proxy for functional diversity. Phylogenetic diversity is indeed supposed to match functional diversity if functions are conservative traits along evolution. However, in case of adaptive radiation and/or evolutive convergence, a mismatch may appear between species phylogenetic and functional singularities. Using highly threatened taxa,...
Tipo: Text
Palavras-chave: Adaptive radiation; Conservation; Endangered clade; Evolutionary convergence; Niche conservatism; Phylogenetic signal.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00400/51113/69865.pdf

Interactions des bactéries marines responsables de la formation des biosalissures avec des matériaux biospécifiques
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hamadouche, Nora.
The immersion of a material in a marine environment automatically results in forming a biological veil which develops into biofouling. Biofouling is responsible for many problems that occur on immerged structures. Marine bacteria are strongly involved in biofouling and specific studies are aiming at limiting their adhesion to the surface of immerged materials.  The Laboratoire de Recherches sur les Macromolécules (Macromolecule Research Laboratory) has demonstrated that modulating or inhibiting human commensal bacteria with biospecific statistical copolymers is possible. The goal of our research has been to identify statistical copolymers capable of inhibiting marine bacteria adhesions and therefore reduce marine biofilm formation. In order to do so, two...
Tipo: Text
Palavras-chave: Biofouling; Specific Interaction; Statistical Copolymers; Marine Bacteria; Biofouling; Interaction spécifique; Copolymères statistiques; Bactéries marines.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/these-1614.pdf

Preliminary results of a trawl fitted with a selective grid for the fishery of benthic species from Celtic Sea and Bay of Biscay
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Meillat, Marc; Dupouy, Herve; Bavouzet, Gerard; Kergoat, B.; Morandeau, Fabien; Gaudou, Olivier; Vacherot, Jean-philippe.
The fishery for benthic species (Monkfish, Megrim, Rays, etc ... ) represents for the surrounder countries of the Celtic Sea and the Bay of Biscaye one of the most important activities . An estimate of the discards of the main species resulting from the sorting practice onboard of the trawlers participating in this fishery was made in 1985 and 1991. it was concluded that an important quantity of juveniles of Rays, Megrim and Monkfish are discarded each year causing an important mortality. The aim of the present paper is to present the preliminary results of a selectivity grid fixed on a bottom trawl to limit as possible the discards. Three different grids were tested at sea during surveys with different results. The major problem is due to difference in...
Tipo: Text
Palavras-chave: Chalut sélectif; Grille; Mer Celtique; Golfe de Gascogne; Baudroies; Sardines; Raies; Selectivity; Grid; Trawl; Celtic Sea; Bay of Biscaye; Monkfish; Megrim; Rays.
Ano: 1991
URL: https://archimer.ifremer.fr/doc/00394/50567/51258.pdf

Etudes sur le hareng
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Gall, Jean.
Le Laboratoire de Boulogne-sur-Mer est admirablement placé pour étudier ce poisson. A toute époque de l'année, les bateaux boulonnais, chalutiers ou drifters débarquent du hareng frais et comme leur champ d'action s'étend des Shetlands à l'entrée du Pas-de-Calais, en mer du Nord ; de Calais à Antifer, puis à Start Point, en baie de Plymouth, en Manche ;  à l'entrée occidentale de la Manche, à Smalls, puis sur la côte ouest d'Irlande, et enfin, depuis cette dernière année, au nord de l'Irlande sur les fonds au large d'Inishtrahull, il est possible d'obtenir des échantillons frais des régions les plus diverses. Plus de deux mille harengs ont ainsi été examinés au Laboratoire, dont 763 provenant de la Manche,  325 de la mer du Nord, 1.050 de Smalls et de...
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1928
URL: http://archimer.ifremer.fr/doc/1928/publication-5694.pdf

Rapport de mission à l'Institut de recherche en aquaculture du CSIC de Torre de la Sal. 14-16 avril 2004
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lacroix, Denis.
Cette seconde mission s'inscrit dans le cadre de la préparation d'un projet européen de type « I3 » : Integrated infrastructure initiative. Ce type de projet vise le renforcement de l'espace européen de la recherche par l'intégration croissante des structures de recherche de l'Europe. De 2001 à 2004, la station de Palavas a assuré la coordination du programme européen ASEFAF (grande infrastructure pour l'accueil de visiteurs chercheurs étrangers, en partenariat avec le laboratoire ARN de Brest). Ce programme ayant donné d'excellents résultats et ayant été apprécié par la Commission, la direction d'IFREMER a voulu poursuivre cet engagement par la préparation d'un I3 sur la recherche en pisciculture marine.
Tipo: Text
Ano: 2004
URL: http://archimer.ifremer.fr/doc/00304/41526/40734.pdf

Etude de la qualité microbiologique et chimique du gisement de tellines de St Jean de Monts et St Hilaire de Riez. 85.05 « Sud Pont d’Yeu ». Département de Vendée
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Blouin, Antoine; Cochennec-laureau, Nathalie.
Etude de la qualité microbiologique et chimique du gisement naturel de tellines « Sud Pont d’Yeu », St Jean de Monts et St Hilaire de Riez – groupe 2. Département de Vendée. Rapport final 2017. L’étude de zone 85.05 « Sud Pont d’Yeu » conduite pour le groupe 2 avait pour objectifs de déterminer la qualité de la zone et de définir la stratégie d’échantillonnage à appliquer dans le cadre de la surveillance REMI. Le bassin versant se restreint à la plage, les principales sources de contamination potentielles sont essentiellement diffuses et liées aux activités à proximité très immédiate de la plage. Aucun exutoire (eaux pluviales ou usées) pouvant impacter la qualité microbiologique de la zone de production n’a pu être identifié. Il existe cependant des...
Tipo: Text
Palavras-chave: Ifremer; REMI; Etude sanitaire; E. Coli; Contamination bactériologique des coquillages; ROCCH; Contaminants chimiques; Saint Jean de Monts; Classement sanitaire des zones de production; Département de la Vendée.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00374/48553/48879.pdf

Statistique des régions de pêches. Année 1925 (2e semestre) et année 1926 (1er semestre)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Tipo: Text
Ano: 1926
URL: http://archimer.ifremer.fr/doc/00022/13300/10345.pdf

Étude par télédétection de la dispersion en mer des eaux estuariennes issues de la Gironde et du Pertuis de Maumusson
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Castaing, P; Allen, Gp; Houdart, Michel; Moign, Y.
The objective of this study, carried out in the Gironde estuary inlet, was to determine the nature of the seaward dispersion of estuarine water and suspended sediments during a spring tide and high river flow. On June 3, 19(7, three flights were made over the inlet, at mid ebb, low tide and mid flood. The planned flight at high tide was cancelled due to adverse meteorological conditions. During each flight, thermal infrared coverage was obtained, together with black and white photographs. These data were correlated with concomitant ground mesures of current velocity, salinity, temperature and suspended sediment concentration Four types of water masses were identified during the tidal cycle: estuarine "very warm and turbid" water; estuarine "cooler and...
Tipo: Text
Palavras-chave: Hydrodynamique; Suspensions; Télédétection; Eaux côtières; Estuaire; Gironde; Hydrodynamic; Suspended sediments; Remote sensing; Coastal waters; Estuary; Gironde.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/00122/23361/21188.pdf

Growth and age estimation of the greater forkbeard, Phycis blennoides (Actinopterygii: Gadiformes: Phycidae), from the Gulf of Tunis (central Mediterranean)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Romdhani, Ahlem; Ktari, Mohamed-hedi; Dufour, Jean-louis; Mahe, Kelig; Francour, Patrice.
Background. The greater forkbeard, Phycis blennoides (Brünnich, 1768), is a gadiform species, which has economical value and its population is dwelling in a 60–800 m depth range throughout the Atlantic and the Mediterranean. Along African north coast, there is a lack of information about the biology (age, growth, sex-ratio) of this species. This study provides the first data on population parameters of P. blennoides in Tunisia.  Materials and Methods. Specimens of Phycis blennoides were collected from the landings of the artisanal fisheries between September 2007 and June 2010. The length–weight relations were determined according to the allometric equation: W = aTLb. Growth parameters were estimated using the von Bertalanffy growth equation.  Results....
Tipo: Text
Palavras-chave: Otolith; Biological traits; Length-weight relation; Von Bertalanffy growth function.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00324/43532/43077.pdf

Observations on the Lateral Structure of Wind-Driven Flows in a Stratified, Semiarid Bay of the Gulf of California
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Winant, Chloe; Valle-levinson, Arnoldo; Ponte, Aurelien; Winant, Clinton; Gutierrez-de-velasco, Guillermo; Winters, Kraig.
Time series of current velocity profiles and thermistor chains were obtained throughout a cross-bay transect for ~90 days for the purpose of comparing observed wind-driven stratified flows to theory. This study concentrates on the synoptic scale wind and its influence on the bay’s circulation. The maximum water column stratification was 3–4 °C/m throughout the deployment and influenced wind-driven flows. Low-pass filtered flows showed more complicated structures than those expected from theory: a depth-dependent recirculating structure with the along-bay flow over one half of the transect moving in opposite direction to the other half. Analysis of complex empirical orthogonal functions indicated that the first six modes explained 80 % of the flow...
Tipo: Text
Palavras-chave: Wind-driven flow; Stratification; Concepcion Bay; Semiarid.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00171/28218/32176.pdf

Intrusion of Rhone River diluted water into the Bay of Marseille: Generation processes and impacts on ecosystem functioning
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fraysse, Marion; Pairaud, Ivane; Ross, Oliver N.; Faure, Vincent M.; Pinazo, Christel.
The Rhone River provides the largest inputs of terrestrial freshwater and nutrients into the Mediterranean Sea. The Rhone River diluted water intrusions into the Bay of Marseille were investigated, examining their physical generation processes and associated biogeochemical impact by using in situ observations, remote sensing data, and a three-dimensional physical/biogeochemical coupled model. During our study period from 2007 to 2011, Rhone River intrusions occurred on average 7.6 times per year and affected more frequently the northern part of the bay. A classification of intrusion events in three categories is proposed (short lived, big, and small) as a function of their duration and spatial extent. The intrusions appeared to be driven by: (i) wind...
Tipo: Text
Palavras-chave: Three-dimensional physical; Biogeochemical modeling; Rhone River intrusions; Biogeochemical mass balances; Coastal processes; Bay of Marseille (Mediterranean Sea).
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00245/35612/34135.pdf

Use of molecular tools for mollusc disease diagnosis
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Berthe, Franck; Burreson, Eugene; Hine, Mike.
Recently, an increasing number of research teams are engaged in developing DNA-based diagnostic techniques for mollusc pathogens. These techniques are slowly moving from development in specialised laboratories for research purposes, to routine application and are expected to find an increasing use in routine disease monitoring programs in mollusc aquaculture and in efforts to prevent the spread of pathogens within and between nations. Considering the probable development and interest in these diagnostic techniques, the potential for wide applications in aquaculture and the inherent problems currently associated with their use, it appears necessary to address these issues.
Tipo: Text
Palavras-chave: Molecular tools; Mollusc disease; Diagnosis; Pathology.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/publication-3291.pdf

Meiobenthos of the bay of saint-brieuc (north brittany, france) .2. harpacticoid copepod diversity and species assemblages
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bodin, P; Leguellec, C.
Harpacticoid copepods (Crustacea) of the Bay of Saint-Brieuc (Western Channel, France) were collected in winter and late spring 1988, at five intertidal and six subtidal sites. 140 species (many new and some rare) were identified, and several diversity indices (Shannon; Fisher et al.; Margalef) were calculated for the different sites: very high values were obtained at some of them, specially in heterogeneous sediment (H' = 5.26). Pearson's correlation coefficients show that diversity was positively correlated with TOM and depth. Correspondence factorial analyses applied to dominant species suggested the existence of an intertidal fine sand assemblage, with a low salinity ''facies'' (sensu Bodin, 1977), and a subtidal heterogeneous muddy sand assemblage,...
Tipo: Text
Palavras-chave: HARPACTICOID COPEPODS; DIVERSITY; SPECIES ASSEMBLAGES; FRENCH COAST OF ENGLISH CHANNEL; INTERTIDAL AND SUBTIDAL ZONES.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00101/21242/18857.pdf

Biocénoses des fonds durs du bathyal et de l’abyssal. Sous-région marine Méditerranée occidentale. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fabri, Marie-claire; Pedel, Laura.
Tipo: Text
Palavras-chave: Méditerranée; Fonds durs; Coraux profonds; Roches bathyales; Roches abyssales; Biocénoses.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00331/44209/43778.pdf

Les minéraux lourds des sables du littoral de la Guyane française : bilan sur l’origine des dépôts de la plate-forme des Guyanes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pujos, M; Pons, Jc; Parra, M.
The distribution of heavy minerals on beaches and beach ridges sands of French Guiana shows three distinct suites from East to West: amphibole (largely dominant), staurolite, epidote and pyroxene off the Cayenne region, tourmaline and amphibole mainly off the Kourou-Mana, garnet, staurolite and tourmaline off the Mana-Maroni. A very good continuity exists between the assemblages of heavy minerals from the catchment area parent-rocks, the fluviatile sediments, the coastal zone and the shelf. The results of this study indicate and strengthen a local origin for the sandy sediments and do not support a possibility of an Amazonian source.
Tipo: Text
Palavras-chave: Guyane française; Plages; Cordons sableux; Minéraux lourds; French Guiana; Beaches; Beach ridges sands; Heavy minerals.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00291/40271/38643.pdf

Une Expérience de Marquage sur la Sardine du Golfe de Gascogne
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Letaconnoux, Robert.
Tipo: Text
Ano: 1951
URL: http://archimer.ifremer.fr/doc/00414/52584/53422.pdf

Extraction de granulats marins et activités halieutiques en Manche orientale
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Cette synthèse a pour but de présenter les gisements potentiels ou actuellement exploités, dans la région de Fécamp à Dunkerque. La production de granulats au Nord de la France est actuellement insuffisante pour répondre à la demande en matériaux. D'autre part, les sites terrestres exploitables sont de plus en plus rares et les contraintes d'environnement ont brutalement augmenté ces dernières années. Pour éviter une rupture de l'approvisionnement dans un futur proche, diverses solutions sont mises en oeuvre, et les extractions de sédiments meubles marins apparaissent comme un substitut éventuel. Il semble, au premier abord, que la réserve en matériaux est importante, mais les conditions d'extraction et la qualité souvent inadaptée des granulats entraînent...
Tipo: Text
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00104/21523/19104.pdf

REMOULA 2000 - Réseau de croissance moule des Pertuis Charentais - Mars 2000 - Février 2001
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Robert, Stephane; Geairon, Philippe; Guilpain, Patrice; Razet, Daniel; Faury, Nicole; Seugnet, Jean-luc; Grizon, James; Soletchnik, Patrick; Le Moine, Olivier; Goulletquer, Philippe.
A production monitoring network focused on the blue mussel Mytilus edulis, was developed at the Charentais sounds' geographic level to assess the spatial and temporal variability of the mussel production. Similarly to the oyster growth monitoring network REMORA, an homogeneous and calibrated mussel population (L = 35.5 mm, TW = 3.35 g) was distributed into six rearing sites, representative of the sounds production. The rearing technics were compared and intercalibrated with previous growout facilities used for preliminary trials (round bags-oyster bags). The monitoring was based upon biometric and biochemical measurements on a 3 month and monthly basis, for ail and 3 sites respectively. The mortality rates showed a significant spatial and temporal...
Tipo: Text
Palavras-chave: Réseau de croissance; Mytilus edulis; Composition biochimique; Mortalité; Pertuis Charentais; Charente-Maritime; Production monitoring network; Mytilus edulis; Proximate biochemical composition; Mortality rate; Charentais sounds; Charente-Maritime.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00031/14243/11518.pdf

The dragon tamed? A molecular phylogeny of the Conoidea (Gastropoda)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Puillandre, N.; Kantor, Yu. I.; Sysoev, A.; Couloux, A.; Meyer, C.; Rawlings, T.; Todd, J. A.; Bouchet, P.
The superfamily Conoidea constitutes one of the most diverse and taxonomically challenging groups among marine molluscs. Classifications based on shell or radular characters are highly contradictory and disputed. Whereas the monophyly of the Conidae and Terebridae has not been challenged, the other constituents of the superfamily are placed in a ‘trash’ group, the turrids, the non-monophyly of which has been demonstrated by anatomical and molecular evidence. We present here a new molecular phylogeny based on a total of 102 conoidean genera (87 ‘turrids’, 5 cones and 10 terebrids) and three mitochondrial genes [cytochrome oxidase I (COI), 12S rRNA and 16S rRNA]. The resulting tree recognizes 14 clades. When the Conidae (Conus s.l.) and Terebridae are ranked...
Tipo: Text
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00144/25554/23699.pdf

The marginal SaoPaulo plateau, comparaison with the southern angolan margin
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mascle, Jean; Renard, Vincent.
During the Geobrésil cruise of the R. V. Jean Charcot (1973) several marine geophysical lines, including bathymetry, magnetism, continuous seismic as well as sonobuoy profiles have been run across a deep marginal plateau extending on the southeastern Brazilian margin and known as the Sao Paulo Plateau. These data indicate the presence of a thick sedimentary cover (more than 4s DTT) on the upper slope and up to 3s DTT thick on the lower slope and rise. The entire slope is highly disturbed by salt diapiric structures mostly apparent between the 2 000-3 000 bathymetriclines and comparable to the ones described in the western Mediterranean sea. The Sao Paulo scarp, bordering the deep marginal plateau to the South-West, is believed to be a discontinuous and "en...
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1976
URL: http://archimer.ifremer.fr/doc/1976/publication-4990.pdf

Working Group on the Biology and Assessment of Deep-sea Fisheries Resources (WGDEEP)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ICES.
WGDEEP gives advice according to an advice schedule where, in short, half of the stocks advice is given in year y and the other half has advice in year y+1. The exception from this schedule is stocks from ICES Division 5.a (Iceland) that have advice annually. Available time-series for international landings and discards, fishing effort, survey indices and biological information were updated and for all stocks and are presented in Sections 4–15 of the report. In response to a special request from the EU on the added value of having small TAC for greater silver smelt in subarea 7 the meeting evaluated available information. The EU TAC, currently covering subareas 5, 6  and 7, does not correspond to the stock unit evaluated by ICES which is greater silver...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00502/61331/64903.pdf

Definition of scientific basis for the development of an overall aquaculture masterplan for South Africa - Report of the mission in South Africa from 9 to 15 February 1998 - Project definition and detailed workplan for 1998
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dosdat, Antoine; Fuchs, Jacques; Mazurie, Joseph; Paquotte, Philippe; Mariojouls, Catherine.
After the decision taken by the French - South African committee to reduce the budget and the duration of all the selected proposaIs of the first call, Rhodes University and Ifremer decided to revise their joint proposaI and organized a meeting in South Africa in february 1998. A multidisciplinary team composed of economists and specialists in different fields of aquaculture spent on week in South Africa (9 and 15 february 1998) with Prof Hecht and his team in Rhodes University, in order to precise the proposaI and define detailed actions to be carried out within the next two years. The present report summarises the principal conclusions of the survey in term of general approach, detailed methodologies and planning for 1998.
Tipo: Text
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00153/26463/24571.pdf

Avis sur projet de création de lotissements de captage d'huîtres creuses sur la côte sud de la rade de Brest
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Bec, Claude; Boulben, Sylviane; Pouvreau, Stephane.
Tipo: Text
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00131/24181/79417.pdf

Particle size specific magnetic properties across the Norwegian-Greenland Seas: Insights into the influence of sediment source and texture on bulk magnetic records
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hatfield, Robert G.; Wheeler, Benjamin H.; Reilly, Brendan T.; Stoner, Joseph S.; Housen, Bernard A.
We make fundamental observations of the particle size variability of magnetic properties from 71 core tops that span the southern Greenland and Norwegian Seas. These data provide the first detailed regional characterization of how bulk magnetic properties vary with sediment texture, sediment source, and sediment transport. Magnetic susceptibility (MS) and hysteresis parameters were measured on the bulk sediment and the five constituent sediment particle size fractions (clay, fine, medium, and coarse silt, and sand). The median MS value of the medium silt size fraction is ~3‐5 times higher than that of the sand and clay size fractions and results in a strong sensitivity of bulk MS to sediment texture. Hysteresis properties of the clay size fraction are...
Tipo: Text
Palavras-chave: Northern Basaltic Province; Magnetic susceptibility; Nordic Seas; Magnetic grain size; Sediment source; Sediment transport.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00478/58998/61614.pdf

Tracking the provenance of Greenland-sourced, Holocene aged, individual sand-sized ice-rafted debris using the Pb-isotope compositions of feldspars and 40Ar/39Ar ages of hornblendes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: White, Lee F.; Bailey, Ian; Foster, Gavin L.; Allen, Georgina; Kelley, Simon P.; Andrews, John T.; Hogan, Kelly; Dowdeswell, Julian A.; Storey, Craig D.
The provenance of sand-sized ice-rafted debris (IRD) sourced from Greenland is currently difficult to determine. Such knowledge, if it could be ascertained with a high degree of certainty, could be applied to the Greenland-proximal marine records to improve both our understanding of modern-day spatial patterns of iceberg rafting and the past history of the Greenland Ice Sheet (GIS). Recent studies have highlighted the utility of the Pb-isotope composition of individual sand-sized feldspars and the Ar-40/Ar-39 ages of individual sand-sized hornblendes in this regard. However, before any such provenance toolkit can be applied to the palaeo-record, it is necessary first to determine whether this approach can be used to track the sources of known recent...
Tipo: Text
Palavras-chave: Greenland; Ice rafted debris; Ar-Ar; Pb isotopes; Icebergs; Provenance.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00421/53292/54130.pdf

Enhanced surveillance of shellfish mortality to improve early detection and investigation of outbreaks of exotic or emerging infectious diseases: An example of a mass mortality outbreak of mussels, France 2014
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lupo, Coralie; Prou, Jean.
This paper explores the relevance and feasibility of enhanced surveillance of mussel-related mortality based on regular telephone interviews of a key informant in a farming community. Based on qualitative analyses of data collected through semi-structured interviews, this method of participatory disease surveillance enabled the retrieval of high quality data during an outbreak of mussel mortality which occurred in Pertuis Charentais, France, in 2014.  The findings illustrated that such an enhanced surveillance approach compared with the institutional shellfish health surveillance system could improve the early detection of outbreaks of mussel mortality by one week. This approach enabled a detailed description of the outbreak, showing higher incidence...
Tipo: Text
Palavras-chave: Early warning; Perception; Enhanced clinical surveillance; Shellfish diseases; Participative disease surveillance; Qualitative methods.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00348/45914/45708.pdf

Seasonal and diurnal variability in carbon respiration, calcification and excretion rates of the abalone Haliotis tuberculata L.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chapperon, Coraline; Clavier, Jacques; Dugué, Clément; Amice, Erwan; Le Goff, Marion; Roussel, Sabine.
Abalone (Haliotis spp.) are commercially important marine shellfish species worldwide. Knowledge about the physiology of abalone that impacts life-history traits is important for a better understanding of the biology of the species and the impact of stressful husbandry procedures at different seasons. The present study quantified the seasonal and diurnal variations in four physiological parameters of the European species Haliotis tuberculata, i.e. carbon aerial and aquatic respiration, calcification and excretion rates, and the effect of prolonged aerial exposure upon abalone aerial respiration. We also investigated the effect of individual size upon these physiological parameters. Aquatic respiration and calcification rates showed an allometric...
Tipo: Text
Palavras-chave: Ormer; Metabolism; Carbon fluxes; Physiology.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00431/54243/55886.pdf

Oblique rifting and segmentation of the NE Gulf of Aden passive margin
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fournier, M; Bellahsen, N; Fabbri, O; Gunnell, Y.
The Gulf of Aden is a young, obliquely opening, oceanic basin where tectonic structures can easily be followed and correlated from the passive margins to the active mid-oceanic ridge. It is an ideal laboratory for studies of continental lithosphere breakup from rifting to spreading. The northeastern margin of the Gulf of Aden offers the opportunity to study on land the deformation associated with oblique rifting over a wide area encompassing two segments of the passive margin, on either side of the Socotra fracture zone, exhibiting distinct morphologic, stratigraphic, and structural features. The western segment is characterized by an elevated rift shoulder and large grabens filled with thick synrift series, whereas the eastern segment exhibits low...
Tipo: Text
Palavras-chave: Continental breakup; Gulf of Aden; Oblique rifting; Paleostress; Passive margin; Segmentation; Continental margins and sedimentary basins; Continental tectonics-extensional; Stresses-crust and lithosphere.
Ano: 2004
URL: https://archimer.ifremer.fr/doc/00226/33728/32200.pdf

Addressing Marine and Coastal Governance Conflicts at the Interface of Multiple Sectors and Jurisdictions
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bellanger, Manuel; Speir, Cameron; Blanchard, Fabian; Brooks, Kate; Butler, James R. A.; Crosson, Scott; Fonner, Robert; Gourguet, Sophie; Holland, Daniel S.; Kuikka, Sakari; Le Gallic, Bertrand; Lent, Rebecca; Libecap, Gary D.; Lipton, Douglas W.; Nayak, Prateep Kumar; Reid, David; Scemama, Pierre; Stephenson, Robert; Thébaud, Olivier; Young, Juliette C.
Marine and coastal activities are closely interrelated, and conflicts among different sectors can undermine management and conservation objectives. Governance systems for fisheries, power generation, irrigation, aquaculture, marine biodiversity conservation, and other coastal and maritime activities are typically organized to manage conflicts within sectors, rather than across them. Based on the discussions around eight case studies presented at a workshop held in Brest in June 2019, this paper explores institutional approaches to move beyond managing conflicts within a sector. We primarily focus on cases where the groups and sectors involved are heterogeneous in terms of: the jurisdiction they fall under; their objectives; and the way they value ecosystem...
Tipo: Text
Palavras-chave: Trade-offs; Ecosystem management; Ecosystem services; Cross-sectoral coordination; Marine governance; Multi-jurisdictional conflicts; Institutions; Environmental policy.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00652/76376/77383.pdf

Statistique des pêches maritimes - Année 1929
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Tipo: Text
Ano: 1931
URL: http://archimer.ifremer.fr/doc/00162/27359/25588.pdf

Respective Roles of the Guinea Current and Local Winds on the Coastal Upwelling in the Northern Gulf of Guinea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Djakoure, S.; Penven, Pierrick; Bourles, Bernard; Kone, V.; Veitch, J.
The northern Gulf of Guinea is a part of the eastern tropical Atlantic where oceanic conditions due to the presence of coastal upwelling may influence the regional climate and fisheries. The dynamics of this coastal upwelling is still poorly understood. A sensitivity experiment based on the Regional Oceanic Modeling System (ROMS) is carried out to assess the role of the detachment of the Guinea Current as a potential mechanism for coastal upwelling. This idealized experiment is performed by canceling the inertia terms responsible for the advection of momentum in the equations and comparing with a realistic experiment. The results exhibit two major differences. First, the Guinea Current is found to be highly sensitive to inertia, as it is no longer detached...
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00391/50248/69638.pdf

Génétique moléculaire et aquaculture : perspectives et exemple d'application sur les microalgues marines
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Devauchelle, Nicole.
La révolution des techniques utilisées en biologie cellulaire ces vingt dernières années donnent une conception nouvelle et évolutive du fonctionnement et de l'architecture de la cellule. L'intégration de ces données est indispensable au travail du biologiste attaché au développement, de l'aquaculture, comme à celui de tout autre biologiste. L'utilisation des nouvelles techniques n'est toutefois pas nécessaire à toutes les recherches. La biologie moléculaire et cellulaire a ses domaines de prédilection. Nous allons tenter, dans la première partie de ce rapport, de pointer ceux qui en aquaculture peuvent en bénéficier le plus. La seconde partie illustrera concrètement nos propos.
Tipo: Text
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00044/15539/12916.pdf

Novel use of pop‑up satellite archival telemetry in sawsharks: insights into the movement of the common sawshark Pristiophorus cirratus (Pristiophoridae)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Burke, Patrick J; Mourier, Johann; Gaston, Troy F; Williamson, Jane E.
Background Understanding movement patterns of a species is vital for optimising conservation and management strategies. This information is often difficult to obtain in the marine realm for species that regularly occur at depth. The common sawshark (Pristiophorus cirratus) is a small, benthic associated elasmobranch species that occurs from shallow to deep-sea environments. No information is known regarding its movement ecology. Despite this, P. cirrata are still regularly landed as nontargeted catch in the south eastern Australian trawl fisheries. Three individuals were tagged with pop-up satellite archival tags (PSATs) off the coast of Tasmania, Australia, to test the viability of satellite tagging on these small elasmobranchs and to provide novel...
Tipo: Text
Palavras-chave: Elasmobranch; Satellite telemetry; Diel vertical migration; Tagging; Pristiophoridae; Australia; Movement.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00632/74399/74101.pdf

Did the Indo-Pacific leptomedusa Lovenella assimilis (Browne, 1905) or Eucheilota menoni Kramp, 1959 invade northern European marine waters? Morphological and genetic approaches
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Brylinski, Jean-michel; Li, Luen-luen; Vansteenbrugge, Lies; Antajan, Elvire; Hoffman, Stefan; Van Ginderdeuren, Karl; Vincent, Dorothee.
Hydromedusae, morphologically resembling the Indo-Pacific leptomedusa Lovenella assimilis (Browne, 1905) (Cnidaria: Hydrozoa: Lovenellidae), are reported for the first time in both the eastern English Channel and the southern bight of the North Sea. Analyses of past zooplankton samples from a long-term monitoring program suggest that this non-indigenous species has been present in the eastern English Channel at least since 2007. Genetic analyses identified specimens as Eucheilota menoni based on nearly identical 18S ribosomal RNA gene, mitochondrial cytochrome oxydase subunit gene I (COI) sequences, and 16S Ribosomal RNA gene. Consequently, published morphological descriptions of L. assimilis and E. menoni were compared, and their species status is...
Tipo: Text
Palavras-chave: Non-indigenous species (NIS); Jellyfish; Hydrozoa; Lovenella assimilis; Eucheilota menoni.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00285/39646/38145.pdf

Influence of food density and temperature on ingestion, growth and settlement of Pacific oyster larvae, Crassostrea gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rico Villa, Benjamin; Pouvreau, Stephane; Robert, Rene.
Ingestion, growth and metamorphosis of Pacific oyster, Crassostrea gigas, larvae were studied under controlled conditions of food density and temperature using a combination of a flow-through rearing system and a hydrobiological monitoring device. In a first experiment larvae were exposed to three different phytoplankton densities (12, 20 and 40 cells &amp;#956;l-1) while in a second trial larvae were reared at five different temperatures (17, 22, 25, 27 and 32°C). Both food concentration and temperature significantly affected the larval physiology throughout the entire development from D-veliger to young spat. Larvae survived over a wide range of both environmental parameters with high survival at the end of experiments. The feeding functional response...
Tipo: Text
Palavras-chave: Temperature; Food; Growth; Ecophysiology; Bivalve larvae; Crassostrea gigas.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2008/publication-4747.pdf

Mise en œuvre opérationnelle de l’outil FlowCAM / ZooPhytoImage dans le cadre de la surveillance REPHY. Action 9 - FlowCAM / ZooPhytoImage - Livrable 2. Rapport final, mars 2015.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Neaud-masson, Nadine; Lefebvre, Alain; Belin, Catherine; Soudant, Dominique.
This deliverable contains the work that was carried out in 2014 for the FlowCAM / ZooPhytoImage tool actually becomes a usable operational tool in the REPHY, and as such, can provide results supplying the assessments of WFD phytoplankton indicator. This deliverable is complementary to the deliverable 1, provided for the same action, entitled « Evolutive version of the operational tool for digitization and semi-automated analysis of phytoplankton images, using the FlowCAM device and the Zoo/PhytoImage software. New perspectives » This deliverable has five parts whose content is summarized below.  1. Work done for operational implementation in 2014 under the REPHY. These tasks affect either the scanning operations of the phytoplankton images by FlowCAM, or...
Tipo: Text
Palavras-chave: FlowCAM; ZooPhytoImage; REPHY; Observation phytoplancton; Set d’apprentissage; Littoral français.; FlowCAM; ZooPhytoImage; REPHY; Phytoplankton observation; Training set; French coast.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00361/47262/47227.pdf

Compléments à la réponse à la saisine 2008-1014 sur les pressions potentielles des engins de pêche sur les habitats et espèces listés dans les Directives Habitats (92/43/EEC) et Oiseaux (2009/147/CE), pour les sennes danoises et écossaises ainsi qu’envers les récifs côtiers et les récifs circalittoraux.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Biseau, Alain; Le Mao, Patrick; Sartoretto, Stephane; Tourolle, Julie; Menot, Lenaick; Fabri, Marie-claire; Larnaud, Pascal; Drogou, Mickael; Morandeau, Fabien; Vacherot, Jean-philippe; Vermard, Youen.
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00300/41147/41077.pdf

Structural framework of selected regions of the western mediterranean 1. Valencia basin
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pautot, Guy; Auzende, Jean-marie; Olivet, Jean-louis; Mauffret, Alain.
The alignment of the Balearic Islands, stretching from the Spanish mainland towards the Corsican-Sardinian block, has long intrigued many geologists. Since Suess (1886), we know that the Balearic block (Ibiza, Formentera, and Majorca) is part of the Alpine system. Many authors (Kober, 1914; Staub, 1928; Kober, 1931) have subsequently attempted to comprehensively integrate the history of the Balearic block within the history of the Alpine chain. In this paper, we will use data from marine geology and geophysics to define the location of the Balearic Islands during the diverse phases of distension, shearing, and compression between the European and African plates, which created the present western Mediterranean and the Alpine chain. In particular, we will...
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1972
URL: http://archimer.ifremer.fr/doc/1972/publication-5035.pdf

Screening of Vibrio isolates to develop an experimental infection model in the Pacific oyster Crassostrea gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gay, Melanie; Berthe, Franck; Leroux, Frederique.
In an attempt to develop a reproducible experimental model of bacterial infection in Crassostrea gigas, oysters taken from very localised sub-populations suffering natural mortality outbreaks were used in cohabitation trials under laboratory conditions. From these trials, a collection of Vibrio strains was isolated from moribund and healthy oysters. In a second step, strains were experimentally tested for virulence by means of injection into healthy oysters. This screening revealed a span of virulence among isolated strains from none to medium. When pooling injected strains, results suggest increased virulence. Vibrio strains may have additive/synergistic action leading to higher C, gigas mortality rates in experimental challenges. Although the study...
Tipo: Text
Palavras-chave: Crassostrea gias; Antagonism; Agonism; Virulence; Vibrio splendidus.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-3174.pdf

Predictive modelling of seabed habitats: case study of subtidal kelp forests on the coast of Brittany, France
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Meleder Tard, Vona; Populus, Jacques; Guillaumont, Brigitte; Perrot, Thierry; Mouquet, Pascal.
Predictive modelling to map subtidal communities is an alternative to "traditional" methods, such as direct sampling, remote sensing and acoustic survey, which are neither time- nor cost-effective for vast expanses. The principle of this modelling is the use of a combination of environmental key parameters to produce rules to understand species distribution and hence generate predictive maps. This study focuses on subtidal kelp forests (KF) on the coast of Brittany, France. The most significant key parameters to predict KF frequency are (1) the nature of the substrate, (2) depth, (3) water transparency, (4) water surface temperature and (5) hydrodynamics associated with the flexibility of algae in a flow. All these parameters are integrated in a spatial...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00006/11758/9273.pdf

Is the trophic diversity of marine benthic consumers decoupled from taxonomic and functional trait diversity? Isotopic niches of Arctic communities
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Wlodarska-kowalczuk, Maria; Aune, Magnus; Michel, Loic; Zaborska, Agata; Legezynska, Joanna.
It is predicted that a diverse array of functional traits in species-rich assemblages can lead to strong resource partitioning among coexisting species and moderate a wider spectrum of resource use. We compared two benthic communities in an Arctic fjord: a species-rich community (in an outer basin) and an impoverished community (in a glacially impacted bay) and explored (1) if high species richness was translated into high functional trait richness and (2) if high taxonomic and functional diversity promoted high trophic diversity in terms of resource use (indicated by isotopic niche measures). We documented higher functional trait richness in the outer basin (computed based on traits describing feeding mode, mobility, food source, body size and life...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00516/62774/67171.pdf

Lithospheric modification by extension and magmatism at the craton-orogenic boundary: North Tanzania Divergence, East Africa
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tiberi, C.; Gautier, S; Ebinger, C.; Roecker, S.; Plasman, M.; Albaric, J.; Deverchere, Jacques; Peyrat, S.; Perrot, Julie; Wambura, R. Ferdinand; Msabi, M.; Muzuka, A.; Mulibo, G.; Kianji, G.
We present a joint analysis of newly acquired gravity and teleseismic data in the North Tanzanian Divergence, where the lithospheric break-up is at its earliest stage. The impact of a mantle upwelling in more mature branches of the East African Rift has been extensively studied at a lithospheric scale. However, few studies have been completed that relate the deep-seated mantle anomaly detected in broad regional seismic tomography with the surface deformation observed in the thick Archaean Pan-African suture zone located in North Tanzania. Our joint inversion closes the gap between local and regional geophysical studies, providing velocity and density structures from the surface down to ca. 250 km depth with new details. Our results support the idea of a...
Tipo: Text
Palavras-chave: Gravity anomalies and Earth structure; Africa; Joint inversion; Seismic tomography; Intra-plate processes.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00637/74944/76038.pdf

Note préliminaire sur la morue du sud de la mer du nord et de la région du Pas-De-Calais
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lefranc, Gérard.
The cod stock in the south of the North Sea and of the Pas-de-Calais consists mostly of young individuals (less than 4 years old) but growing fast, and thus showing a greater weight at the same age than the cods from more eastern parts of the Northern Atlantic Ocean. The fact that this population has grown greatly since 1963, presumably because of the harsh conditions of the winter 1962-1963, lead to a rapid development of the catches. Indeed, it has been observed that, despite a growth of the fishing effort, performances have slightly increased with the production now reaching about 10,000 tonnes per year and accounting for a large percentage of the cod unloaded in Boulogne. It is difficult to foresee the future of this stock, which can only remain stable...
Tipo: Text
Ano: 1966
URL: https://archimer.ifremer.fr/doc/1996/publication-6658.pdf

Qualité du Milieu Marin Littoral. Bulletin de la surveillance 2013. Départements du Gard, de l’Hérault, de l’Aude et des Pyrénées Orientales
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Océanographie et Dynamique des Ecosystèmes Unité Littoral Laboratoire Environnement Ressources du Languedoc Roussillon.
Tipo: Text
Palavras-chave: REMI; REPHY; ROCCH; REBENT; DCE; RESCO.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00190/30124/28586.pdf

Acquis biologique sur le pétoncle noir (Chlamys varia) en Rade de Brest 1973-1983. Conséquences sur l'aménagement de la ressource
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dao, Jean-claude; Gerard, Andre; Buestel, Dominique.
Research on the black scallop followed that on the king scallop. Indeed, over the 1973-1975 " spadework » period, it has been demonstrated that the roadsted of Brest was: - an overexploited king scallop deposit; the broodstock not being able to ensure a satisfying renewal of the species. - a black scallop production deposit (hundreds of tonnes). In parallel, the collection trials provided null results for the king scallop but very interesting results for the black scallop (thousands of spats per collector). From 1976 onwards, the spat collecting operations did not focus on king scallop juveniles anymore, but on black scallop.
Tipo: Text
Palavras-chave: Reproduction; Captage; Physiologie; Pétoncle; Chlamys varia.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-6538.pdf

Premieres observations sur le squelette axial du crabe dit "des fumeurs" Cyanagraea praedator de Saint Laurent
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Secretan, S; Guinot, D.
The specific features of the skeleton of Cyanagraea praedator comprise the concentration of the thoracic pleurites at the upper level, the contraction of the relevant endopleurites, and the development of the epimeral pouch destined to contain the pericardial sac.
Tipo: Text
Ano: 1988
URL: http://archimer.ifremer.fr/doc/00267/37802/35883.pdf

Mammifères Marins. Sous-région marine Méditerranée occidentale. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Martinez, Ludivine; Laran, Sophie; Dabin, Willy; Van Canneyt, Olivier; Doremus, Ghislain; Caurant, Florence; Peltier, Hélène; Spitz, Jérôme; Vincent, Cécile; Ridoux, Vincent; Kiszka, Jeremy.
Tipo: Text
Palavras-chave: Méditerranée; Mammifères marins; Conservation; Caractéristiques démographiques; Suivi; Espèces; Rôle dans les écosystèmes.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00331/44214/43783.pdf

Espèces de thonidés d'intérêt potentiel pour l'aquaculture en Méditerranée
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Gall, Jean-yves.
Bluefin tuna is particularly concerned in the project of tuna rearing in the Mediterranean sea. However there are no reasons to neglect the other tuna species of the Mediterranean sea which present an interesting material for the development of the research on tuna cultivation.
Tipo: Text
Palavras-chave: Thon; Aquaculture; Méditerranée; Tuna; Mariculture; Mediterranea.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/00342/45326/44787.pdf

Evaluation of the spoilage potential of bacteria isolated from spoiled cooked whole tropical shrimp (Penaeus vannamei) stored under modified atmosphere packaging
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mace, Sabrina; Cardinal, Mireille; Jaffres, Emmanuel; Cornet, Josiane; Lalanne, Valerie; Chevalier, Frederique; Serot, Thierry; Pilet, Marie-france; Dousset, Xavier; Joffraud, Jean-jacques.
The spoilage potential of isolates belonging to five bacterial groups/species (Shewanella baltica, Carnobacterium maltaromaticum, Aeromonas salmonicida, Vibrio sp., “other Gamma-Proteobacteria” [containing one strain of Pseudoalteromonas sp. and one strain of Psychrobacter sp.]) isolated from spoiled cooked and whole tropical shrimp stored under modified atmosphere packaging (MAP) was evaluated by inoculation into ionized cooked and peeled tropical shrimp followed by storage for 32 days at 8°C. Microbial growth and sensory changes were monitored during the storage period. The major spoilage bacterial isolate groups were C. maltaromaticum and S. baltica. In order to characterize their spoilage potential further and to study the effect of their interactions,...
Tipo: Text
Palavras-chave: Spoilage potential; Bacterial interaction; Specific spoilage organism; Cooked tropical shrimp; Volatile compounds.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00168/27926/26200.pdf

Trois ans après l'"Amoco-Cadiz" : Hydrocarbures persistants dans les huîtres et cinétique d'épuration - Contrat CNEXO n° 80/6317
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gouygou, Jean-paul; Michel, Pierre.
L'accident de l'"Amoco-Cadiz"le 16 mars 1978 est venu compromettre gravement les activites ostréicoles implantées en Bretagne nord et plus spécialement dans l'Aber Benoît, l'Aber Wrac'h et la baie de Morlaix. Malgré l'importance de la contamination, il est vite apparu que sur les huîtres les mortalites dues au petrole étaient insignifiantes et les consequences sur la physiologie des animaux restaient mineures. Par contre, du fait de l'aptitude de ces coquillages à concentrer les hydrocarbures presents dans l'eau et les matières solides en suspension, on a très vite atteint des concentrations en petrole interdisant la commercialisation de ces produits avec toutes les consequences économiques qui en resultent. En baie de Morlaix, soumise à l'action directe...
Tipo: Text
Ano: 1981
URL: http://archimer.ifremer.fr/doc/00046/15686/13088.pdf

The Flood in the Black Sea - Science and Mythology
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dimitrov, P; Ryan, W; Ballard, R; Haarmann, H; Dimitrov, D; Solakov, D; Slavova, K; Peev, P; Peychev, V; Petrov, P; Lericolais, Gilles.
The most recent geological history of the Black Sea, which covers the last 25 thousand years, is a subject of special attention today. This interest is due mainly to the hypothesis we have launched about the early Holocene flood in the Black Sea. This hypothesis was a real shock to the scientific community, among whom the Bulgarian geologists and archaeologists received it with great hostility. The anathematization was accompanied by a fierce media campaign, as a result of which Prof. Robert Ballard, the discoverer of Titanic, left Bulgaria disappointed.
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/acte-4934.pdf

Statistiques ISTPM de pêches - année 1957
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Tipo: Text
Ano: 1958
URL: http://archimer.ifremer.fr/doc/1958/publication-4639.pdf

A review of rare and less well known extant marine organic-walled dinoflagellate cyst taxa of the orders Gonyaulacales and Suessiales from the Northern Hemisphere
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Limoges, Audrey; Van Nieuwenhove, Nicolas; Head, Martin J.; Mertens, Kenneth; Pospelova, Vera; Rochon, André.
Dinoflagellate resting cysts with rare exception produce the only discrete link between the biology of extant dinoflagellate species and their fossil record. The geological preservability of such cysts allows them to be used for quantitative paleoecological reconstructions, especially in the Quaternary, and for biostratigraphy and the calibration of molecular clocks with the geological record. This contribution reviews and updates the taxonomy of 27 uncommon dinoflagellate cyst species and morphotypes belonging to the orders Gonyaulacales and Suessiales with occurrences in upper Quaternary marine sediments of the Northern Hemisphere. Comparative descriptions and illustrations are provided along with the biological affinity of each taxon where known and...
Tipo: Text
Palavras-chave: Dinoflagellate cysts; Gonyaulacales; Suessiales; Marine sediment; Quaternary.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00593/70487/68626.pdf

Etude de la farine de poisson : Analyse de la variation de la composition de la farine élaborée à l'usine de transformation du poisson, Interpêche
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guerreiro, Marthe; Retiere, Laurence.
Objectif : La complexité et l'étendue du sujet nous ont obligé à définir trois grandes directives, sélectionnées en fonction des informations disponibles. Les objectifs principaux sont de : - tester la cohérence des résultats d'analyses par rapport aux fluctuations annuelles de la qualité de la matière première utilisée, - apprécier l'importance de la répercussion des modifications techniques apportées aux chaînes de production sur la qualité du sous-produit et aussi le rendement matière de la farineuse. Enfin, et à la suite des conclusions apportées, il est souhaitable de vérifier l'adaptabilité des "normes" de qualité, actuellement utilisées pour l'interprétation des analyses. En fonction des résultats, d'autres références plus appropriées au produit...
Tipo: Text
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00060/17086/14598.pdf

La maladie des branchies chez les huitres du genre Crassostrea caracteristiques et evolution des alterations processus de cicatrisation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Comps, Michel.
A few observations were mentioned in an earlier paper (COMPS, 1969) that concerned the histological features of the lesions that appeared during the gill infection to which Crassostrea angulata has been particularly prone since 1966. Since it has, however, not been possible to date to isolate and grow a culture of the parasite presumed to be the responsible agent of the disease, a more complete anatomopathological and histological study was contemplated in order to try to specify the definition of the offending protist and reveal the process of deterioration of the oyster's tissues as well as the reactions of the host to the infestation by and growth of the parasite.  In addition, importing Crassostrea gigas THUNBERG from Japan at the very moment that gill...
Tipo: Text
Ano: 1970
URL: http://archimer.ifremer.fr/doc/1970/publication-3145.pdf

Lignes et cannes manuelles à Grands pélagiques. La Réunion. 2017. Observation des Marées au débarquement - OBSDEB
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public. Ces indicateurs intègrent...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00595/70717/68944.pdf

Evidence for a three-phase sequence during Heinrich Stadial 4 using a multiproxy approach based on Greenland ice core records
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guillevic, M.; Bazin, L.; Landais, A.; Stowasser, C.; Masson-delmotte, V.; Blunier, T.; Eynaud, F.; Falourd, S.; Michel, E.; Minster, B.; Popp, T.; Prie, F.; Vinther, M.
Glacial climate was characterised by two types of abrupt events. Greenland ice cores record Dansgaard–Oeschger events, marked by abrupt warming in-between cold, stadial phases. Six of these stadials appear related to major Heinrich events (HEs), identified from ice-rafted debris (IRD) and large excursions in carbon- and oxygen-stable isotopic ratios in North Atlantic deep sea sediments, documenting major ice sheet collapse events. This finding has led to the paradigm that glacial cold events are induced by the response of the Atlantic Meridional Overturning Circulation to such massive freshwater inputs, supported by sensitivity studies conducted with climate models of various complexities. These models also simulate synchronous Greenland temperature and...
Tipo: Text
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00293/40438/39539.pdf

Bilan des observations hydrologiques du secteur côtier au large de la Loire et de la Vilaine en 2018
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Collin, Karine; Bizzozero, Lucie; Le Merrer, Yoann; Retho, Michael; Pierre-duplessix, Olivier; Souchu, Philippe; Cochennec-laureau, Nathalie.
Ce rapport décrit le contexte hydrologique du littoral côtier du Morbihan, Pays de Loire et Nord Vendée, durant l’année 2018. Il s’appuie sur les suivis environnementaux réalisés dans le cadre des réseaux REPHY et de la DCE, complétés des données acquises en haute fréquence sur la bouée MOLIT et sur le secteur du Bois de la Chaise.
Tipo: Text
Palavras-chave: Hydrologie; DCE; Nutriment; Loire Bretagne; Rephy; Phytoplancton.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00634/74571/74443.pdf

Statistiques biologiques et considérations sur les populations de harengs de la Manche orientale et du sud de la Mer du Nord (matériel prélevé en 1934)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Gall, Jean.
Ces Statistiques Biologiques continuent la série des Statistiques et Considérations que nous avons régulièrement publiées depuis 1926. Elles résument les observations faites pendant l'année 1934 sur les pêcheries de harengs de la Manche orientale et du sud de la Mer du Nord. [OCR NON CONTRÔLE]
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1935
URL: http://archimer.ifremer.fr/doc/1935/publication-5712.pdf

Observations sur deux langoustes de la Martinique - Panulirus Argus et Panulirus Guttatus - Premières données biométriques et étude comparée de leurs croissances relatives
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Farrugio, Henri.
Parmi les cinq espèces de langoustes recensées à la Martinique, le "homard blanc", Panulirus argus (LATREILLE, 1804) et le "homard bissié", Panulirus guttatus (LATREILLE, 1804), sont de loin les plus abondantes et représentent la quasi-totalité des apports de la pêche de crustacés.
Tipo: Text
Ano: 1975
URL: http://archimer.ifremer.fr/doc/1975/publication-7110.pdf

Puissances de pêche et relations avec les caractéristiques techniques des navires. Exemple de flottilles pratiquant les arts traînants en Manche Ouest, Atlantique et Méditerranée.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Biseau, Alain; Mahevas, Stephanie; Perodou, Jean-bernard; Berthou, Patrick.
Three fleets of the French fishery are investigated : the dredge fleet of the Western part of the Channel, the bottom-trawl fishery of South-Britanny harbours, and the Mediterranean trawl fishery. Landing and effort data by species, vessel and trip lead to yields (catch per unit of effort) which are analysed by a multicplicative model with two or three factors. Individual fishing powers are then quantified for some given years, together with variation in relative abundance of the stock within area and/or period strata. Attempts to explain these fishing powers by vessels characteristics are made. After the study of the Mediterranean trawl-fleet, which takes Year into account in the model, two multi-annual series are analysed, and some conclusions on fishing...
Tipo: Text
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00327/43785/43343.pdf

Assessment of seasonal and year-to-year surface salinity signals retrieved from SMOS and Aquarius missions in the Bay of Bengal
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Akhil, V. P.; Lengaigne, Matthieu; Durand, Fabien; Vialard, Jerome; Chaitanya, A. V. S.; Keerthi, M. G.; Gopalakrishna, V. V.; Boutin, Jacqueline; De Boyer Montegut, Clement.
The Bay of Bengal (BoB) exhibits a wide range of sea surface salinity (SSS), with very fresh water induced by heavy monsoonal precipitation and river run-offs to the north, and saltier water to the south. This is a particularly challenging region for the application of satellite-derived SSS measurements because of the potential pollution of the SSS signal by radio frequency interference (RFI) and land-induced contamination in this semi-enclosed basin. The present study validates recent level-3 monthly gridded (1° × 1°) SSS products from Soil Moisture and Ocean Salinity (SMOS) and Aquarius missions to an exhaustive in situ SSS product for the BoB. Current SMOS SSS retrievals do not perform better than existing climatologies. This is in stark contrast to...
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00319/42986/45003.pdf

The abundance of deep-sea meiobenthos in the western pacific in relation to environmental-factors
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Shirayama, Y.
Tipo: Text
Ano: 1984
URL: http://archimer.ifremer.fr/doc/00113/22412/20109.pdf

Acoustic behaviour of male European lobsters (     Homarus gammarus     ) during agonistic encounters
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Jézéquel, Youenn; Coston-guarini, Jennifer; Chauvaud, Laurent; Bonnel, Julien.
Previous studies have demonstrated that male European lobsters (Homarus gammarus) use chemical and visual signals as a means of intraspecific communication during agonistic encounters. In this study, we show that they also produce buzzing sounds during these encounters. This result was missed in earlier studies because low-frequency buzzing sounds are highly attenuated in tanks, and are thus difficult to detect with hydrophones. To address this issue, we designed a behavioural tank experiment using hydrophones, with accelerometers placed on the lobsters to directly detect their carapace vibrations (i.e. the sources of the buzzing sounds). While we found that both dominant and submissive individuals produced carapace vibrations during every agonistic...
Tipo: Text
Palavras-chave: Passive acoustics; Male European lobster; Agonistic encounter; Accelerometer; Buzzing sound; Carapace vibration; Tank; Acoustic communication.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00614/72565/71516.pdf

Hydrothermal faunal assemblages and habitat characterisation at the Eiffel Tower edifice (Lucky Strike, Mid-Atlantic Ridge)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cuvelier, Daphne; Sarradin, Pierre-marie; Sarrazin, Jozee; Colaco, Ana; Copley, Jon T.; Desbruyeres, Daniel; Glover, Adrian G.; Santos, Ricardo Serrao; Tyler, Paul A.
The Eiffel Tower edifice is situated in the Lucky Strike hydrothermal vent field at a mean depth of 1690 m on the Mid-Atlantic Ridge (MAR). At this 11-m-high hydrothermal structure, different faunal assemblages, varying in visibly dominant species (mussels and shrimp), in mussel size and in density of mussel coverage, were sampled biologically and chemically. Temperature and sulphide (Sigma S) were measured on the different types of mussel-based assemblages and on a shrimp-dominated assemblage. Temperature was used as a proxy for calculating total concentrations of CH4. Based on the physico-chemical measurements, two microhabitats were identified, corresponding to (i) a more variable habitat featuring the greatest fluctuations in environmental variables...
Tipo: Text
Palavras-chave: Faunal assemblage; Hydrothermal vent; Microhabitat; Mid-Atlantic Ridge; Physico-chemical characterisation.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00035/14648/13996.pdf

Mg/Ca ratios in the planktonic foraminifer Neogloboquadrina pachyderma (sinistral) in the northern North Atlantic/Nordic Seas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Meland, My; Jansen, E; Elderfield, H; Dokken, Tm; Olsen, A; Bellerby, Rgj.
In core top samples in the Nordic Seas, Mg/Ca ratios of N. pachyderma ( sin.) are generally consistent with previous high-latitude calibration data but do not reflect the modern calcification temperature gradient from 2 degrees C in the northwest to 8 degrees C in the southeast. This is because Mg/Ca ratios in foraminiferal shells from the central Nordic Seas are similar to 0.4 mmol/mol higher than expected from calibrations of Nurnberg ( 1995) and Elderfield and Ganssen ( 2000). The enhanced Mg/Ca ratios are observed in an area with low sedimentation rates (&lt; similar to 5 cm/kyr). Possible factors that may cause this include bioturbation, Holocene variability in old core tops, dissolution, pore water chemistry, occurrence of volcanic ash, and other...
Tipo: Text
Palavras-chave: Planktonic foraminifera; N. pachyderma (sin.); Mg/Ca; Paleothermometry; Paleoceanography; Nordic Seas.
Ano: 2006
URL: https://archimer.ifremer.fr/doc/00234/34559/33319.pdf

Using chemical compositions of sediments to constrain methane seepage dynamics: A case study from Haima cold seeps of the South China Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Wang, Xudong; Li, Niu; Feng, Dong; Hu, Yu; Bayon, Germain; Liang, Qianyong; Tong, Hongpeng; Gong, Shanggui; Tao, Jun; Chen, Duofu.
Cold seeps frequently occur at the seafloor along continental margins. The dominant biogeochemical processes at cold seeps are the combined anaerobic oxidation of methane and sulfate reduction, which can significantly impact the global carbon and sulfur cycles. The circulation of methane-rich fluids at margins is highly variable in time and space, and assessing past seepage activity requires the use of specific geochemical markers. In this study, we report multiple sedimentary proxy records for three piston gravity cores (QDN-14A, QDN-14B, and QDN-31) from the Haima seep of the South China Sea (SCS). By combining total organic carbon (TOC), total inorganic carbon (TIC), total nitrogen (TN), total sulfur (TS), acid insoluble carbon and sulfur isotope...
Tipo: Text
Palavras-chave: Cold seep; Anaerobic oxidation of methane; Carbon and sulfur isotopes; South China Sea.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00465/57662/59858.pdf

National research project on coastal zones - Foreword
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chardy, Pierre.
Tipo: Text
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00325/43635/43230.pdf

Monosaccharide composition of suspended organic particulate matter in relation to its origin
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Compiano, Am; Romano, Jc; Delagiraudiere, I; Laborde, P.
Samples of phytoplankton cultures and of suspended particulate matter from continental, brackish and marine waters were examined by HPLC for the monosaccharide content of their hydrolysable sugar fraction. Eight monosaccharides were currently assayed and their weight compared to HPLC-assayed chlorophyll a concentrations. With the exception of oligotrophic waters, these two variables are well correlated in the various prospected environments. Glucose was always the strongly dominant form, not only in fresh and brackish waters but also in marine samples with high phytoplanktonic biomass. If samples are compared on a salinity basis, only four monosaccharides showed significant differences in their relative concentrations, as a consequence of sampling...
Tipo: Text
Palavras-chave: MONOSACCHARIDE; HPLC; PARTICULATE MATTER; SEA WATER; BRACKISH WATER.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00100/21134/18754.pdf

Stimulation de la productivité naturelle par enrichissements minéraux et organiques : étude en mésocosmes naturels
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hussenot, Jerome; Castel, J; Fardeau, Jean-claude; Feuillet-girard, Michèle; Gautier, Dominique; Gouleau, Dominique; Legrand, C; Martin, Jean-louis; Pirastru, L; Ravail, Brigitte; Rince, Y; Sautour, Benoit.
Il a été étudié sur 9 bassins de terre expérimentaux de 200 m3, à l'état initial identique, l'influence de 2 types de stimulation sur les populations naturelles planctoniques et benthiques et sur la qualité physico-chimique de I'eau et du sédiment en comparaison avec des bassins de référence non stimulés.
Tipo: Text
Palavras-chave: Marais aquacoles; Productivité naturelle; Fertilisants.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00020/13115/10124.pdf

La lettre du Cnexo n° 2 Mai Juin 1980
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Claude, Benoit.
Une page de plus est tournée et nous voici au seuil d'une nouvelle année. Ce sera l'an 1 de la réforme de l'océanologie décidée par le Gouvernement. Bénéficiant largement de la priorité d'ensemble redonnée à la Recherche, nous l'aborderons certes avec des contraintes sévères au niveau du fonctionnement, mais avec des moyens renforcés de façon enviable au niveau des autorisations de programmes permettant une modernisation des équipements lourds (SM 97, refonte du Jean CHARCOT) compatible avec le développement des actions de Recherche. Il est parfaitement clair que la priorité du Gouvernement est pour une Recherche dynamique de qualité au bénéfice de l'Économie et que sa décision se situe dans un contexte aux échéances pressantes bien différent de celui qui...
Tipo: Text
Ano: 1980
URL: http://archimer.ifremer.fr/doc/1980/publication-4775.pdf

Modeling 3D Rhone river plume using a higher order advection scheme
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Arnoux-chiavassa, S; Rey, V; Fraunie, P.
Effects of discretization scheme on the numerical modeling of 3D Rhone River plume dynamics are investigated. A higher order scheme of total variation diminishing (TVD) type is used to discretize advection terms of both momentum and scalar equations. It is shown that this scheme widely damps the numerical diffusion and improves the representation of the dynamical and density fronts bounding the flow. It enables to accurately investigate the effects of the turbulent diffusion, which was previously masked by the numerical one. Numerical results are also compared to in situ data for two situations related to different wind conditions. For the case without wind stress, associated to supercritical values of the Richardson number, optimized turbulent...
Tipo: Text
Palavras-chave: Océanographie côtière; Modèle numérique 3D; Panache fluvial; Écoulements stratifiés; Schémas variation totale décroissante; Coastal oceanography; 3D numerical model; River plume; Stratified flows; Total variation diminishing schemes.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00321/43259/42990.pdf

Potential of fascaplysin and palauolide from Fascaplysinopsis cf reticulata to reduce the risk of bacterial infection in fish farming
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mai, Tepoerau; Toullec, Jordan; Van Wynsberge, Simon; Besson, Marc; Soulet, Stephanie; Petek, Sylvain; Aliotti, Emmanuelle; Ekins, Merrick; Hall, Kathryn; Erpenbeck, Dirk; Lecchini, David; Beniddir, Mehdi A.; Saulnier, Denis; Debitus, Cecile.
Marine natural products isolated from the sponge Fascaplysinopsis cf reticulata, in French Polynesia, were investigated as an alternative to antibiotics to control pathogens in aquaculture. The overuse of antibiotics in aquaculture is largely considered to be an environmental pollution, because it supports the transfer of antibiotic resistance genes within the aquatic environment. One environmentally friendly alternative to antibiotics is the use of quorum sensing inhibitors (QSIs). Quorum sensing (QS) is a regulatory mechanism in bacteria which control virulence factors through the secretion of autoinducers (AIs), such as acyl-homoserine lactone (AHL) in gram-negative bacteria. Vibrio harveyi QS is controlled through three parallel pathways: HAI-1, AI-2,...
Tipo: Text
Palavras-chave: Porifera; Marine natural products; Quorum sensing inhibitors; Antibiotic; Fascaplysinopsis cf reticulata.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00598/71052/69366.pdf

The 2016 Annual Economic Report on the EU Fishing Fleet (STECF16-11)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Scientific, Technical and Economic Committee for Fisheries (STECF).
In 2014, the EU fishing fleet numbered 81 500 vessels with a combined gross tonnage (GT) of 1.6 million tonnes and engine power of 6.4 million kilowatts (kW). EU fleet capacity has continued to decrease steadily, at an average annual rate of 2% in terms of vessel numbers and engine power (kW) and 3% in terms of gross tonnage (GT). Based on data submitted by Member States under the Data Collection Framework (DCF), there were 63 642 active vessels and 17 860 inactive vessels in 2014. Of the active vessels, 74% were classed as small-scale, 26% large-scale and remaining less than 1%, distant-water vessels. Direct employment generated by the fleet amounted to just under 150 000 fishers, corresponding to 111 140 FTEs. The revenue (income from landings plus other...
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00366/47720/47762.pdf

Influence des rivières le Gouessant et le Fremur sur la qualité des eaux conchylicoles de la Baie de Morieux et de la Baie de la Fresnaye
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Loreal, Henri.
La contamination bactérienne des moules de bouchots élevées en baie de Morieux est préoccupante depuis de nombreuses années. Malgré les lourds investissements réalisés par les collectivités locales sur le pourtour de la baie de Saint-Brieuc pour s'équiper de stations d'épuration des eaux usées il n'a pas été constaté d'amélioration, le niveau d'insalubrité étant resté sensiblement constant. Les bouchots à moules de la baie de Morieux s'étendent sur l'estran entre la pointe des Guettes et Port Morvan sur environ 6 km. Répartis en trois groupes ou plans, ils représentent, mis bout à bout, 83 km. Une cinquantaine d'entreprises mytilicoles exploitent ces bouchots et expédient à la consommation une production de 4 à 5 000 tonnes de moules annuellement. Les...
Tipo: Text
Ano: 1984
URL: http://archimer.ifremer.fr/doc/00132/24280/22278.pdf

Biomasse et production primaire du phytoplancton et du microphytobenthos de deux biotopes sableux (Golfe de Fos, France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Plante-cuny, Marie-reine; Bodoy, Alain.
The primary production (phytoplankton and microphytobenthos) of a coastaL shallow water ecosystem (0.5 m) was investigated in two sandy areas, differing by their wave exposure. The physical and chemical parameters, the functional chlorophyll and pheopigments as well as the primary production were measured monthly, throughout a two-year study. The bivalve Ruditapes decussatus was the dominant species in the sheltered station (RD), whereas Donax trlmcu/us inhabited the other station (DT) which was exposed to the open-sea waves. Microphytic biomasses were determined after extracting chlorophyll a and pheopigments in 90% acetone. by spectrophotometric measurements before and after acidification. Gross hourly primary production was estimated by measuring the...
Tipo: Text
Palavras-chave: Biomasse; Production primaire; Phytoplancton; Microphytobenthos; Mediterranee; Biomass; Primary production; Phytoplancton; Microphytobenthos; Mediterranean.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/publication-2870.pdf

L'huître creuse Crassostrea gigas en Bretagne. Résultats du réseau de suivi de 1991
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Bec, Claude; Mazurie, Joseph.
The year 1991 is the third one of the regional network on growth assessment of Crassostrea gigas in Brittany, wearing on 9 sites and 3 stations per site. 2 bags of 210 oysters, 18 month old, were placed in each station. Comparatively to previous years, the 1991 growth was moderate, and condition index inferior. However, the survival rates were very high (above 91 %) and most of the slight mortalities occurred a short time after stocking (as revealed by the sizes of dead shells). An improvement was also observed in the infestation rate by the polychaete Polydora sp..Most of the growth differences between sites and stations are still present. An analytical study including environmental variables would be necessary for explanations and will be tempted in 1993.
Tipo: Text
Palavras-chave: Bretagne; Crassostrea gigas; Croissance; Mortalité; Indice de condition; Polydora; A.C.P.; Brittany; Crassostrea gigas; Growth; Mortality; Condition index; Polydora; Factorial analysis.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00102/21319/18939.pdf

General introduction about by-products, worldwide situation and French focus
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Perez-galvez, Raul; Berge, Jean-pascal.
Introduction : A direct consequence of traditional fishing practices is the considerable quantities of wastes and byproducts that are generated. They represent an economical and environmental problem since not all obtained from the sea is adequately used but thrown back into the sea as a waste. With the aim of classifying and quantifying the by-products, three main groups are considered: discards, wastage on board and by-products and wastage on shore.
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-7409.PDF

Short term changes in zooplankton community during the summer-autumn transition in the open NW Mediterranean Sea: species composition, abundance and diversity
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Raybaud, V.; Nival, P.; Mousseau, L.; Gubanova, A.; Altukhov, D.; Khvorov, S.; Ibanez, F.; Andersen, V.
Short term changes in zooplankton community were investigated at a fixed station in offshore waters of the Ligurian Sea (DYNAPROC 2 cruise, September-October 2004). Mesozooplankton were sampled with vertical WPII hauls (200 mu m mesh-size) and large mesozooplankton, macrozooplankton and micronekton with a BIONESS multinet sampler (500 mu m mesh-size). Temporal variations of total biomass, species composition and abundance of major taxa were studied. Intrusions of low salinity water masses were observed two times during the cruise. The first one, which was the most intense, was associated with changes in zooplankton community composition. Among copepods, the abundance of Calocalanus, Euchaeta, Heterorhabdus, Mesocalanus, Nannocalanus, Neocalanus,...
Tipo: Text
Palavras-chave: Ligurian sea; Wind events; Phytoplankton community; Vertical distributions; Seasonal variations; English channel; Spring bloom; Oregon coast; Variability; Copepods.
Ano: 2008
URL: https://archimer.ifremer.fr/doc/00208/31975/30410.pdf

Morphological control of slope instability in contourites: a geotechnical approach
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Miramontes, Elda; Garziglia, Sebastien; Sultan, Nabil; Jouet, Gwenael; Cattaneo, Antonio.
Contourite drifts are sediment bodies formed by the action of bottom currents. They are common features found on continental slopes and are often affected by slope failure. However, processes controlling slope instability in contourite depositional systems are still not well constrained, and it is not clear whether contourites have particular properties that make them more susceptible to slope failure. In this study, we compare sedimentological and geotechnical properties of contouritic and hemipelagic sediments within the Corsica Trough (northern Tyrrhenian Sea) using geophysical data sets and sediment cores in order to get a better understanding of the controlling factors of slope stability. Geomorphological and slope stability analyses reveal that...
Tipo: Text
Palavras-chave: Sediment drift; Submarine landslide; Undrained shear strength; Hemipelagite; Mediterranean Sea.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00425/53636/56652.pdf

Statistical processing of West Africa wave directional spectra time-series into a climatology of swell events
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Olagnon, Michel; Kpogo-nuwoklo, Komlan; Guede, Zakoua.
Accurate estimation of long-term sea conditions is a major issue for the design of coastal and offshore structures, for the preparation of marine operations, and for other applications such as marine energy, and coastal erosion. It requires, on the one hand, proper parametric models of the sea state spectra and the statistics of the parameters, and on the other hand, representations of their time evolutions. In some locations such as West Africa, sea conditions are complex with wave spectra showing many well separated peaks corresponding to several swells and wind sea. The present study focuses on swell at a West Africa location. First, a time-consistent triangular model is assessed for the spectral shapes of the swell components. Then statistical analysis...
Tipo: Text
Palavras-chave: Joint probabilities; Metocean time-series; Swell spectral models; Ocean wave climate; Event tracking; Offshore fatigue design.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00156/26695/24761.pdf

Recent invasion of the Japanese oyster drill along the French Atlantic coast: identification of specific molecular markers that differentiate Japanese, Ocinebrellus inornatus, and European, Ocenebra erinacea, oyster drills
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Garcia Meunier, Pascale; Martel, Corine; Pigeot, Jacques; Chevalier, Guillemette; Blanchard, Gérard; Goulletquer, Philippe; Robert, Stephane; Sauriau, Pierre-guy.
The direct amplification of length polymorphism technique (DALP) has been used to distinguish species-specific banding patterns in two marine gastropod oyster drills Ocenebra erinacea (Linnaeus, 1758) and Ocinebrellus inornatus (Recluz, 1851). Ocenebra erinacea is the European oyster drill, common along all European coasts. Ocinebrellus inornatus, the Japanese oyster drill, was recorded in oyster growing areas of the Marennes-Oleron Bay (SW France) for the first time in 1995. This new biological invasion could lead to an increase, which must be evaluated, in the predation risk for cultivated species i.e. oysters and blue mussels, and for littoral fishing resources along the French Atlantic coasts. As a result, since specific identification of early life...
Tipo: Text
Palavras-chave: French Atlantic coast; Ocenebra erinacea; Ocinebrellus inornatus; Marine bioinvasions; Molecular markers.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/publication-569.pdf

Deep ocean inertia-gravity waves simulated in a high-resolution global coupled atmosphere-ocean GCM - art. no. L04610
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Komori, N; Ohfuchi, W; Taguchi, B; Sasaki, H; Klein, Patrice.
In order to investigate the deep ocean inertia-gravity waves, a high-resolution global coupled atmosphere-ocean simulation is carried out with a coupling interval of 20 minutes. Large (similar to 10(-3) m s(-1)) root-mean-square variability of vertical velocity is found in middepths (2000-4000 m), which is not reported in previous studies using realistic ocean simulations. Horizontal distribution of the large variability roughly corresponds to the wintertime atmospheric storm tracks and is stretched equatorward due to beta-dispersion in open ocean with some "shadow regions'' behind the obstacles. Frequency spectrum of vertical velocity has strong peaks at around f and 2f (f is the local inertial period) in midlatitudes, and has additional peak at around...
Tipo: Text
Palavras-chave: Coupled atmosphere ocean model; Deep ocean; Inertia gravity wave.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-3825.pdf

Effects of blue light on the biochemical composition and photosynthetic activity of Isochrysis sp. (T-iso)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Marchetti, Julie; Bougaran, Gael; Jauffrais, Thierry; Lefebvre, Sebastien; Rouxel, Catherine; Saint-jean, Bruno; Lukomska, Ewa; Robert, Rene; Cadoret, Jean-paul.
In aquaculture, particularly in bivalve hatcheries, the biochemical composition of algal diets has a strong influence on larval and post-larval development. Biochemical composition is known to be related to culture conditions, among which light represents a major source of variation. The effects of blue light on biochemical composition and photosynthetic rate of Isochrysis sp. (T-iso) CCAP 927/14 were assessed in chemostat at a single irradiance (300 μmol photons m−2 s−1) and compared with white light. Two different dilution (renewal) rates were also tested: 0.7 and 0.2 d−1. Relative carbohydrate content was lower under blue light than under white light at both dilution rates, whereas chlorophyll a and photosynthesis activity were higher. In contrast,...
Tipo: Text
Palavras-chave: Isochrysis; Blue light; Photosynthesis; Proximate composition; Chemostat.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00085/19599/17237.pdf

Shelled Molluscs
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Berthou, Patrick; Poutiers, Jean-maurice; Goulletquer, Philippe; Dao, Jean-claude.
Shelled molluscs are comprised of bivalves and gastropods. They are settled mainly on the continental shelf as benthic and sedentary animals due to their heavy protective shell. They can stand a wide range of environmental conditions. They are found in the whole trophic chain and are particle feeders, herbivorous, carnivorous, and predators.  Exploited mollusc species are numerous. The main groups of gastropods are the whelks, conchs, abalones, tops, and turbans; and those of bivalve species are oysters, mussels, scallops, and clams. They are mainly used for food, but also for ornamental purposes, in shellcraft industries and jewelery. Consumed species are produced by fisheries and aquaculture, the latter representing 75% of the total 11.4 millions metric...
Tipo: Text
Palavras-chave: Management; Fishing gears; Biology; Aquaculture; Fisheries; Gastropods; Bivalves.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2001/publication-529.pdf

Les apports de la génétique dans la filière ostréicole française
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lapegue, Sylvie; Renault, Tristan.
The most known and certainly the most important contribution of genetics to the oyster indus try is the development of the triploid cupped oyster. Released for the first time in the 1980s, the triploid oyster has triplets of  chromosomes instead of pairs. Currently, triploid oysters are obtained by crossing diploid and tetraploid oysters. These oysters are characterized by a near lack of milt in summer, which makes them generally popular with consumers, and by a faster growth, allowing a shorter production cycle. In parallel, the exploitation of natural resistance in the diversity of French oysters has been considered to improve the health of farmed populations which is a  major challenge for the sustainability of aquaculture farms. Currently, the...
Tipo: Text
Palavras-chave: Huître creuse; Triploïdie; Sélection; Maladies; Ostréiculture; Cupped oyster; Triploidy; Selection; Disease; Shellfish farming.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00498/60931/64326.pdf

Voyage du S.Y. Belgica 1897 - 1899. Volume 1. Travaux hydrographiques et instructions nautiques
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lecointe, G.
Ce mémoire comprend quatre parties : la première s'occupe de généralités et de notre traversée dans l'Océan Atlantique ; la deuxième se rattache à notre navigation dans le détroit de Magellan, au Sud du Cap Horn et dans le détroit de Bransfield ; la troisième partie est consacrée au détroit de Gerlache ; la quatrième enfin fait connaître les travaux que nous avons effectués depuis le moment de notre départ du détroit de Gerlache jusqu'à la fin de la campagne. Nous nous abstenons d'aborder ici la question des compas qui sera développée dans un mémoire consacré spécialement aux observations magnétiques.
Tipo: Text
Ano: 1903
URL: http://archimer.ifremer.fr/doc/1903/publication-7358.pdf

Population ecology and shell chemistry of a phytal ostracode species (Loxoconcha matagordensis) in the Chesapeake Bay watershed
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vann, Cd; Cronin, Tm; Dwyer, Gs.
Population ecology and shell chemistry were studied in the phytal ostracode Loxoconcha matagordensis (Swain 1955) collected from Zostera marina seagrass beds in the Chesapeake Bay to provide seasonal constraints on shell secretion time for paleothermometry. Population density and age structure were defined by two main breeding cycles that occurred between 01 to 15 June and 02 to 16 August 2001. The time interval between breeding cycles was similar to2 months and total juvenile standing crop increased almost three-fold between the first and second breeding cycles. Dark brown over-wintered adults comprised the majority of the population between March and April 2001, while newly secreted translucent adults were predominant between June and September. Seasonal...
Tipo: Text
Palavras-chave: Ostracoda; Paleoclimatology; Ecology; Minor elements; Holocene; Seagrass.
Ano: 2004
URL: https://archimer.ifremer.fr/doc/00229/33995/32356.pdf

The Arctic sea ice biomarker IP25: a review of current understanding, recommendations for future research and applications in palaeo sea ice reconstructions
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Belt, Simon T.; Mueller, Juliane.
In recent years, a novel proxy for the past occurrence of Arctic sea ice has been proposed that is based on the variable marine sedimentary abundance of an organic geochemical lipid derived from sea ice diatoms in the spring. This lipid, termed IP25 (Ice Proxy with 25 carbon atoms), is a highly branched isoprenoid mono-unsaturated alkene that appears to be sufficiently stable in sediments to permit meaningful palaeo sea ice reconstructions to be carried out over short- to long-term timescales. Since the first proposed use of IP25 as a proxy for palaeo sea ice by Belt et al. (2007), a number of laboratories have measured this biomarker in Arctic sediments and it is anticipated that research activity in this area will increase further in the future. The...
Tipo: Text
Palavras-chave: Sea ice; Arctic; Proxy; IP25; Biomarker; Palaeoclimate.
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00263/37473/36537.pdf

Influence of dry diets on reproductive performance and egg lipid composition during the first spawning season of captive pollack
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Omnes, Marie-helene; Recek, Sophie; Barone, Herve; Le Delliou, Herve; Schmitz, Audrey; Mutelet, Alexis; Suquet, Marc; Robin, Jean H.
Four‐year‐old pollack Pollachius pollachius L., previously fed on dry pellets since their juvenile stage, were divided into three experimental groups two months prior their first spawning season. They were fed a commercial broodstock pellet enriched with 6% added oils, either: (1) capelin oil (control), (2) capelin oil plus arachidonic acid, or (3) DHA rich tuna oil. Spawning performance was determined in each group and egg lipids were analysed. During the vitellogenic period, the estradiol levels in plasma increased with oocyte enlargement, indicating that captivity and pelleted feed did not affect reproductive capacity. Females from each group spawned spontaneously between February and May. Egg production per kg of female was highest in the control...
Tipo: Text
Ano: 2004
URL: http://archimer.ifremer.fr/doc/00002/11322/7859.pdf

Genetic improvement strategy in small aquaculture industries : the new caledonian shrimp experience
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Goyard, Emmanuel; Goarant, Cyrille; Brun, Pierre; Herlin, Jose; Pham, Dominique; Beliaeff, Benoit; Harache, Yves; Loubersac, Lionel; Patrois, Jacques.
Shrimp farming in New Caledonia relies on the culture of a domesticated strain of Litopenaeus stylirostris introduced from Mexico at a time when genetic principles were of little or no consideration. Since then, advances in agriculture and for some aquatic species of importance led caledonian shrimp farmers to reconsider the appropriateness of a genetic improvement strategy adapted to local biotechnical and economical constraints. This questioning involves many different and interrelated aspects: scientific and technologic (genetics, biosecurity, quarantine, ), economic and organizational (financing, diffusion of genetic improvement) and pedagogic (awareness of farmers). Local institutions, producers associations, research centre and sanitary services...
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00198/30879/29247.pdf

Physical speciation of iron in the Atlantic sector of the Southern Ocean along a transect from the subtropical domain to the Weddell Sea Gyre
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chever, Fanny; Bucciarelli, Eva; Sarthou, G.; Speich, Sabrina; Arhan, Michel; Penven, Pierrick; Tagliabue, A.
[1] Distributions of total dissolvable iron (TDFe; unfiltered), dissolved iron (DFe; 0.2 mu m filtered), and soluble iron (SFe; 0.02 mu m filtered) were investigated during the BONUS-GoodHope cruise in the Atlantic sector of the Southern Ocean (34 degrees S/17 degrees E-57 degrees S/0 degrees, February-March 2008). In the mixed layer, mean values of 0.43 +/- 0.28 and 0.22 +/- 0.18 nmol L-1 were measured for TDFe and DFe, respectively. In deeper waters, TDFe and DFe concentrations were 1.07 +/- 0.68 and 0.52 +/- 0.30 nmol L-1, respectively. DFe concentrations decreased from the north (subtropical waters) to the south (Weddell Sea Gyre). In the subtropical domain, dusts coming from Patagonia and southern Africa and inputs from the African continental margin...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00017/12808/9763.pdf

Climate variability and ice-sheet dynamics during the last three glaciations
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Obrochta, Stephen P.; Crowley, Thomas J.; Channell, James E. T.; Hodell, David A.; Baker, Paul A.; Seki, Arisa; Yokoyama, Yusuke.
A composite North Atlantic record from DSDP Site 609 and IODP Site U1308 spans the past 300,000 years and shows that variability within the penultimate glaciation differed substantially from that of the surrounding two glaciations. Hematite-stained grains exhibit similar repetitive down-core variations within the Marine Isotope Stage (MIS) 8 and 4-2 intervals, but little cyclic variability within the MIS 6 section. There is also no petrologic evidence, in terms of detrital carbonate-rich (Heinrich) layers, for surging of the Laurentide Ice Sheet through the Hudson Strait during MIS 6. Rather, very high background concentration of iceberg-rafted debris (IRD) indicates near continuous glacial meltwater input that likely increased thermohaline disruption...
Tipo: Text
Palavras-chave: Insolation; IRD; Heinrich Event; MIS 6; MIS 8; AMOC.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00289/40050/38793.pdf

Genetic basis of summer mortality in juvenile cupped oysters
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Degremont, Lionel; Boudry, Pierre; Bedier, Edouard; Ropert, Michel; Soletchnik, Patrick; Huvet, Arnaud; Moal, Jeanne; Samain, Jean-francois.
The French project "Morest", coordinated by IFREMER, aims to understand the causes of the summer mortalities in Crassostrea gigas. In 2001, three sets of families were bred following a nested half-sib mating design. 17 half-sib families (HSF) were obtained in this first generation (G1) and reared in 3 sites. Significant differences in survival were observed among HSF, and some HSF showed high levels of mortality in all sites, clearly indicating a genetic basis for survival. In 2002, a second generation (G2), including divergent selection and inbred lines, was constituted. Monitoring of survival and growth of G2s were the same as in 2001. Significant differences in survival were found between the offspring of the "high" and "low" selected groups and between...
Tipo: Text
Palavras-chave: Summer; Oyster culture; Juveniles mortality; Genetics; Commercial species; Breeding.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/acte-3346.pdf

Etude des stocks de coquilles Saint-Jacques de Bretagne en 1966
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Faure, Louis.
Parmi les coquillages comestibles, un des plus appréciés est la coquille Saint-Jacques, Pecten maximus, dont d'importants gisements se trouvent sur les côtes bretonnes, principalement en rade de Brest, en baie de Saint-Brieuc et dans la région de Belle-Ile.  Les bancs de la rade de Brest ont déjà fait l'objet d'études parues en 1952 et 1956 dans le Bulletin d'Information de l'Office des Pêches maritimes et la Revue des Travaux de l'Institut des Pêches maritimes. Le "Roselys" a prospecté en 1965 ceux de la baie de Saint-Brieuc (résultats dans "Science et Pêche" n° 137); en 1966 il a continué l'étude de cette même baie et étendu ses travaux à la rade de Brest et aux coureaux de Belle-Ile.
Tipo: Text
Ano: 1966
URL: http://archimer.ifremer.fr/doc/1966/publication-7265.pdf

Dérangement de la faune. Sous-région marine Golfe de Gascogne. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Paillet, Jerome.
Tipo: Text
Palavras-chave: Golfe de Gascogne; Dérangement; Faune marine; Oiseaux marins; Mammifères marins; Espèces aquatiques marines.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00329/44044/79164.pdf

Post-glacial persistence of turbiditic activity within the Rhone deep-sea turbidite system (Gulf of Lions, Western Mediterranean): Linking the outer shelf and the basin sedimentary records
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dennielou, Bernard; Jallet, Laurent; Sultan, Nabil; Jouet, Gwenael; Giresse, Pierre; Voisset, Michel; Berne, Serge.
Emplacement of post-glacial turbidites is commonly controlled by rapid changes in sea level or by seismicity. On the continental rise of the Gulf of Lions (Western Mediterranean), an aseismic area, we identified turbiditic beds deposited during the rising stage and highstand of sea level. Swath bathymetry, sediment cores, in situ Cone Penetrating Tests (CPTU), heavy mineral associations and radiocarbon dating determined the source, composition, distribution and age of the turbiditic beds. Turbidites are composed of homogeneous to positively graded silts to medium sand with quartz (up to 90%), shell debris and shelfal benthic faunas. Their distribution on the sea floor is very patchy and controlled by abundant inherited erosional bedforms. Their source is...
Tipo: Text
Palavras-chave: Holocene; Late Pleistocene; Sea level; Turbidites; Sand; Outer shelf; Canyons.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6316.pdf

Subduction and Accretion in the Japan Trench
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Honza, E.
Some fundamental geomorphologic elements are distinguished in the forearc area. They are the volcanic chain, the basement high, the subduction complex and the trench. A sedimentary basin may occur behind or at the front of the basement high. These geomorphologic features are variable both by the mode of development and their location. The morphology and structure of the NE Japan margin reflect the cumulative effects of subduction since late Oligocence. The Upper Cretaceous basement is overlain by a few kilometers thick Late Cenozoic sediments on the Japan Trench forearc (Tohoku forearc). Structural features in the forearc such as the trend of the basin, faults, trench axis and the horst and grabens of the outer trench slope reflect a block structure whose...
Tipo: Text
Ano: 1981
URL: http://archimer.ifremer.fr/doc/00245/35667/34175.pdf

Three-dimensional tomographic inversion of combined reflection and refraction seismic traveltime data
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hobro, Jwd; Singh, Sc; Minshull, Ta.
A tomographic inversion method is presented for the determination of 3-D velocity and interface structure from a wide range of body-wave seismic traveltime data types. It is applicable to refraction, wide-angle reflection, normal-incidence and multichannel seismic data, and is best suited to a combination of these that provides good independent constraints on seismic velocities and interface depths. The inversion process seeks a layer-interface minimum-structure model that is able to explain the given data satisfactorily by inverting to minimize data misfit and model roughness norms simultaneously. This regularized inversion, and the use of smooth functions to describe velocities and depths, allows the highly non-linear tomographic problem to be...
Tipo: Text
Palavras-chave: Inversion; Ray tracing; Seismic modelling; Seismic structure; Tomography; Traveltime.
Ano: 2003
URL: https://archimer.ifremer.fr/doc/00466/57759/60044.pdf

A new tracking algorithm for sea ice age distribution estimation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Korosov, Anton; Rampal, Pierre; Pedersen, Leif Toudal; Saldo, Roberto; Ye, Yufang; Heygster, Georg; Lavergne, Thomas; Aaboe, Signe; Girard Ardhuin, Fanny.
A new algorithm for estimating sea ice age (SIA) distribution based on the Eulerian advection scheme is presented. The advection scheme accounts for the observed divergence or convergence and freezing or melting of sea ice and predicts consequent generation or loss of new ice. The algorithm uses daily gridded sea ice drift and sea ice concentration products from the Ocean and Sea Ice Satellite Application Facility. The major advantage of the new algorithm is the ability to generate individual ice age fractions in each pixel of the output product or, in other words, to provide a frequency distribution of the ice age allowing to apply mean, median, weighted average or other statistical measures. Comparison with the National Snow and Ice Data Center SIA...
Tipo: Text
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00448/55980/57458.pdf

Overview of the SMOS sea surface salinity prototype processor
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Zine, S; Boutin, J; Font, J; Reul, Nicolas; Waldteufel, P; Gabarro, C; Tenerelli, Joseph; Petitcolin, F; Vergely, J; Talone, M; Delwart, S.
The L-band interferometric radiometer onboard the Soil Moisture and Ocean Salinity mission will measure polarized brightness temperatures (Tb). The measurements are affected by strong radiometric noise. However, during a satellite overpass, numerous measurements are acquired at various incidence angles at the same location on the Earth's surface. The sea surface salinity (SSS) retrieval algorithm implemented in the Level 2 Salinity Prototype Processor (L2SPP) is based on an iterative inversion method that minimizes the differences between Tb measured at different incidence angles and Tb simulated by a full forward model. The iterative method is initialized with a first-guess surface salinity that is iteratively modified until an optimal fit between the...
Tipo: Text
Palavras-chave: Salinity; Oceanography; Microwave radiometry.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-3914.pdf

La praire (Venus verrucosa L.) en rade de Brest et en baie de Grandville : biologie, production, exploitation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Djabali, Farid; Yahiaoui, Mokhtar.
Ce travail regroupe deux études portant sur la biologie et l'exploitation de Venus verrucosa (L) dans la rade de BREST et dans la région de GRANDVILLE. L'espèce Venus verrucosa (L), connue vulgairement sous le nom de "praire" est un Mollusque Lamellibranche de la famille des Veneridae (RAFFINESQUE, 1815) et de la sous-famille des Venerinae (RAFFINESQUE, 1815). La rade de BREST est un milieu marin semi-fermé de dimensions modestes avec un plan d'eau de plus de 180 km2, séparé des eaux du large par un goulet reserré de 1.800 m en moyenne et de 5 km de long. La profondeur varie de 0 à 44 m à l'intérieur de la rade et jusqu'à 50 m dans le goulet. En raison de sa morphologie et de la qualité de son milieu naturel, la rade de BREST intéresse un certain nombre...
Tipo: Text
Ano: 1978
URL: http://archimer.ifremer.fr/doc/00101/21226/18843.pdf

Les nodules polymétalliques et la dépollution des eaux
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pignet, G.; Martin, G.; Bougault, Henri.
Les eaux superficielles sont atteintes de plus en plus gravement par la pollution industrielle, alors que les besoins en eau pure augmentent. C'est pourquoi on est amené à utiliser pour la consommation des eaux de qualités variables contenant en particulier un certain nombre de micropolluants. Les essais présentés ici ont pour but de tester une méthode originale d'élimination de différents cations métalliques bivalents. [OCR NON CONTRÔLE]
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/publication-5396.pdf

Diagnosis of oyster herpes-like virus: development and validation of molecular, immunological and cellular tools "VINO" - Final Report 4th January 1999 to 3rd January 2002
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Renault, Tristan; Davison, Andrew; Xhonneux, Florence; Dorange, Germaine; Culloty, Sarah; Novoa, Beatriz; Dixon, Peter.
Little information is available on viral infections that affect bivalve molluscs. Such a lack of data is due ta a certain inadequacy of the diagnosis methods that are employed when massive mortality events occur. Most laboratories involved in mollusc pathology still analyse samples through light microscopy. World-wide, there is thus currently a lack of information concerning the occurrence of bivalve herpesvituses. This is probably due to the lack of suitable diagnostic tools. The basic method for identification and examination of suspect samples is predominantly histopathology. This enables the identification of any cellular changes, but is not conclusive identification of bivalve herpesviruses. This technique doesn't allow, by itself, to detect viruses...
Tipo: Text
Palavras-chave: Pathology; Virology; Diagnosis; Herpes like virus; Validation molecular; Detection; Herpesviridae; OsHV-1; Diagnostic techniques; Oysters.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00044/15525/12912.pdf

Essais d'obtention de lignées pures de mollusques par gynogenèse
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Peudenier, Isabelle.
La gynogenèse est le développement d'un oeuf activé par un spermatozoïde, mais sans participation du génome paternel. Sur le plan génétique, elle est équivelente à la parthénogénèse mais elle est déclenchée par d'autres facteurs. Chez l'huître creuse, Crassostrea gigas, l'inactiviation génétique du sperme par les UV est plus difficile à obtenir que chez les poissons, principalement du fait d'une grande variabilité inter-indivuelle de la motilité avant irradiation. Par ailleurs, l'absence constatée d'effet Hetwig rend plus délicate la définition d'un temps optimal d'exposition aux UV. Les haploïdes obtenus sont anormaux et n'atteignent pas le stade de larve D. La diploïdie peut être efficacement restaurée en retenant un globule polaire grâce au traitement...
Tipo: Text
Palavras-chave: Gynogenèse; Mollusuqe; Crassostrea gias; 6-DMAP; Cytochalasine B; Imagerie numérique.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00410/52161/52877.pdf

New insight into the formation and evolution of the East Reykjanes Ridge Current and Irminger Current
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Petit, Tillys; Mercier, Herle; Thierry, Virginie.
The Reykjanes Ridge strongly influences the circulation of the North Atlantic Subpolar Gyre as it flows to the Irminger Sea from the Iceland Basin. The circulation is composed of two main along‐ridge currents: the southwestward East Reykjanes Ridge Current (ERRC) in the Iceland Basin and the northeastward Irminger Current (IC) in the Irminger Sea. To study their interconnection through the ridge, as well as their connections with the interior of each basin, velocity and hydrological measurements were carried out along and perpendicular to the crest of the Reykjanes Ridge in June–July 2015 as part of the RREX project. This new dataset changes our view of the ERRC and IC as it reveals undocumented along‐stream evolutions of their hydrological properties,...
Tipo: Text
Palavras-chave: North-Atlantic Subpolar Gyre; Bathymetry; Oceanic circulation; Observations.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00591/70347/68407.pdf

Mangrove increases resiliency of the French Guiana shrimp fishery facing global warming
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Diop, Bassirou; Blanchard, Fabian; Sanz, Nicolas.
This paper deals with the biological, ecological and economic impact of global warming and mangrove habitat availability on the French Guiana shrimp fishery. A dynamic bio-economic model is built by employing a shrimp stock's growth function depending on Sea Surface Temperature (SST) and on mangrove surface. The model is empirically calibrated for the French Guiana shrimp fishery using time series collected over 1995–2011. First, two Cobb-Douglas functions, which describe shrimp's natural growth and harvest, are estimated. Then, a Maximum Economic Yield (MEY) harvest rule, based on the optimization of the net present value derived from fishing, is computed. Three management strategies are compared (Closure, Status Quo management, and MEY) under three...
Tipo: Text
Palavras-chave: Renewable resources; Fishery bio-economic model; Global warming; Shrimp; Sea surface temperature; Mangrove.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00455/56672/58537.pdf

Azote ou phosphore ? Considérations sur le "paradoxe nutritionnel" de la mer méditerranée
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Berland, Br; Bonin, Dj; Maestrini, Sy.
Tipo: Text
Ano: 1980
URL: http://archimer.ifremer.fr/doc/00121/23257/21087.pdf

Evolutionary Dynamics of Chloroplast Genomes in Low Light: A Case Study of the Endolithic Green Alga Ostreobium quekettii
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Marcelino, Vanessa R.; Cremen, Ma Chiela M.; Jackson, Chistopher J.; Larkum, Anthony A. W.; Verbruggen, Heroen.
Some photosynthetic organisms live in extremely low light environments. Light limitation is associated with selective forces as well as reduced exposure to mutagens, and over evolutionary timescales it can leave a footprint on species' genomes. Here, we present the chloroplast genomes of four green algae (Bryopsidales, Ulvophyceae), including the endolithic (limestone-boring) alga Ostreobium quekettii, which is a low light specialist. We use phylogenetic models and comparative genomic tools to investigate whether the chloroplast genome of Ostreobium corresponds to our expectations of how low light would affect genome evolution. Ostreobium has the smallest and most gene-dense chloroplast genome among Ulvophyceae reported to date, matching our expectation...
Tipo: Text
Palavras-chave: Genome streamlining; Photosynthesis; Rates of evolution; Boring algae; Stoichiogenomics.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00659/77094/78418.pdf

Microflores sulfatoreductrices en milieu subantarctique. Relations avec quelques parametres physicochimiques et biologiques. (Microflores totales et heterotrophes)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Delille, D; Bouvy, M.
The archipelago of Kerguelen with its complex fjord distribution is particularly interesting for the study of anoxic systems. Between 1968 and 1972, several stations were investigated fortnightly. One of these was further sampled weekly throughout 1982. Each sample series of sediment included the superficial aerobic and subsuperficial anaerobic levels. Each level was examined for direct epifluorescent counts, heterotrophic and sulfate-reducing bacterial numbers by M.P.N. methods, organic carbon and sulfide measurements. Sulfate-reducing bacteria seemed less related to total biomass than the heterotrophic microflora, the latter being dependent on organic supplies. The hydrogen sulfide production was directly related to the presence of sulfate reducers;...
Tipo: Text
Palavras-chave: Anoxic conditions; Bacteria; Heterotrophic organisms; Sulphur; Organic carbon; Physicochemical properties; Seasonal variations; Population number; Microorganisms; Polar waters; Sulfate reduction.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-970.pdf

Fumage électrostatique : Application aux produits de la mer
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Knockaert, Camille.
The purpose of the study presented in this report is to demonstrate the feasibility of electrostatic smoking applied to fish and to present a pilot which will foreshadow an industrial model. If the idea of using high voltage to accelerate the depositing of smoke compounds goes back to the 1920's, its application to sea produce has still not become common practice. The essential reason for this comes from the fact that reducing smoking time restricts drying time by as much. A new salting/drying technique - Oewatering Impregnation Soaking (DIS) - means, that products with a requisite salt and water content can be smoked. Electrostatic smoking therefore allows processing time to be cut by more than twelve compared to the traditional method (herring and...
Tipo: Text
Palavras-chave: Fumage électrostatique; Pilote électrostatique; Smoking; Electrostatic pilot.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00004/11563/8154.pdf

Modélisation 0D des efflorescences d'Alexandrium en rade de Brest en compétition inter-spécifique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Gland, Guillaume.
Since 2010, planktonic algae Alexandrium minutum, cause of the PSP (Paralytic Shellfish Poisoning) syndrome, has been proliferating in early summer in the bay of Daoulas, within the roadstead of Brest. During this internship, a model has been designed in order to derive these blooms from physical parameters (temperature, irradiance, nutrient supply, dilution rate …). In the model, A.minutum competes with 50 other plankton species with randomly attributed optimal temperature and nutrient uptake abilities. It turns out to reproduce well the bloom of 2012, with a correct date of maximum concentration and a relevant order of magnitude. It reproduces the order of magnitude of 2013 concentrations, but the bloom then is too spread in time around the maximum....
Tipo: Text
Palavras-chave: Alexandrium minutum; Phytoplancton; Efflorescence (bloom); Nutriments; Lumière; Température; Dilution; Absorption (uptake); Quota cellulaire; Croissance; Compétition; Modèle; Rade de Brest.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00209/32004/30442.pdf

Ecology of pathogenic and non-pathogenic Vibrio parahaemolyticus on the French Atlantic coast. Effects of temperature, salinity, turbidity and chlorophyll a
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Deter, Julie; Lozach, Solen; Veron, Antoine; Chollet, Jaufrey; Derrien, Annick; Hervio Heath, Dominique.
Vibrio parahaemolyticus is one of the principal bacterial causes for seafood-borne gastroenteritis in the world. In the present study, three sites located on the French Atlantic coast were monitored monthly for environmental parameters over 1 year. The presence of total and pathogenic V. parahaemolyticus in sediment, water and mussel samples was detected following enrichment by culture and real-time PCR (toxR gene, tdh, trh1 and trh2 virulence genes). Using generalized linear models, we showed that the presence of V. parahaemolyticus in water could be explained by a combination of mean temperature over the 7 days before the day of sampling (P &lt; 0.001) and turbidity (P = 0.058). In mussels, an effect of chlorophyll a (P = 0.005) was detected when an...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00003/11420/8363.pdf

L'utilisation des échantillonneurs passifs. Une nouvelle méthode pour évaluer la contamination chimique des masses d'eau
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gourlay, Catherine; Gonzalez, Jean-louis.
The Water European Framework Directive requires the implementation of programs to monitor the chemical quality of water bodies (freshwater, transition water and seawater), based on grab measurements of concentrations of various contaminants (metals, organic compounds). The results are limited by several analytical difficulties, and the poor representativity because of the temporal variability of contamination. The passive sampling techniques, which basically consist of concentrating substances on a submerged device for a given period, and analyzing accumulated substances, should improve the monitoring, by simplifying analytical issues (lower detection limits, analysis in a simpler matrix), and allowing time integration of the contamination. Here, we...
Tipo: Text
Palavras-chave: Échantillonneurs passifs; Eau; Membrane semi-perméable (SPMD); Gradient de diffusion en couche mince (DGT); Métaux; HAP; Passive samplers; Water; Semipermeable membrane device (SPMD); Diffusive gradient in thin film (DGT); Metals; PAHs.
Ano: 2010
URL: https://archimer.ifremer.fr/doc/00077/18850/16423.pdf

Benchmarking the Optimal Time Alignment of Tsunami Waveforms in Nonlinear Joint Inversions for the Mw 8.8 2010 Maule (Chile) Earthquake
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Romano, F.; Lorito, S.; Lay, T.; Piatanesi, A.; Volpe, M.; Murphy, Shane; Tonini, R.
Finite-fault models for the 2010 Mw 8.8 Maule, Chile earthquake indicate bilateral rupture with large-slip patches located north and south of the epicenter. Previous studies also show that this event features significant slip in the shallow part of the megathrust, which is revealed through correction of the forward tsunami modeling scheme used in tsunami inversions. The presence of shallow slip is consistent with the coseismic seafloor deformation measured off the Maule region adjacent to the trench and confirms that tsunami observations are particularly important for constraining far-offshore slip. Here, we benchmark the method of Optimal Time Alignment (OTA) of the tsunami waveforms in the joint inversion of tsunami (DART and tide-gauges) and geodetic...
Tipo: Text
Palavras-chave: The 2010 Maule earthquake; Joint inversion; Tsunami; Optimal time alignment; Benchmark.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00665/77691/79764.pdf

An adaptable toolkit to assess commercial fishery costs and benefits related to marine protected area network design
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Daigle, Rémi M.; Monaco, Cristian; Elgin, Ashley K.
Around the world, governments are establishing Marine Protected Area (MPA) networks to meet their commitments to the United Nations Convention on Biological Diversity. MPAs are often used in an effort to conserve biodiversity and manage fisheries stocks. However, their efficacy and effect on fisheries yields remain unclear. We conducted a case-study on the economic impact of different MPA network design strategies on the Atlantic cod (Gadus morhua) fisheries in Canada. The open-source R package that we developed to analyze this case study can be customized to conduct similar analyses for other systems. We used a spatially-explicit individual-based model of population growth and dispersal coupled with a fisheries management and harvesting component. We...
Tipo: Text
Palavras-chave: Cost-benefit analysis; Atlantic Cod; Individual based models; Conservation; Fisheries management.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00690/80169/83235.pdf

Perturbations spatio-temporelles anthropiques sur l'ecosysteme marseillais
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Calmet, D; Charmasson, S; Blanc, F.
A chronological analysis of the disturbances caused to a pelagical ecosystem by domestic and industrial outfalls discharged on the surface of the coastal waters is done. Chronological series of various sampled parameters give evidence two fundamental components, a daily one (the trend) and the other one characterized by a periodicity of about 6 h, both linked to the different phases of human activities. Cross spectral analysis applied to salinity and phytoplankton series has pointed out a 50 min delay in the answer of phytoplankton communities to the periodical salinity variations. The use of the spectral principal components analysis allowed a description of the "hydrological" structure of the studied pelagical environment associated with 3 different...
Tipo: Text
Ano: 1983
URL: http://archimer.ifremer.fr/doc/00247/35798/34311.pdf

Statistique des pêches maritimes - Année 1927
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Tipo: Text
Ano: 1928
URL: http://archimer.ifremer.fr/doc/00162/27357/25586.pdf

Molecular analyses of protists in long-term observation programmes—current status and future perspectives
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Stern, Rowena; Kraberg, Alexandra; Bresnan, Eileen; Kooistra, Wiebe H. C. F.; Lovejoy, Connie; Montresor, Marina; Moran, Xose Anxelu G.; Not, Fabrice; Salas, Rafael; Siano, Raffaele; Vaulot, Daniel; Amaral-zettler, Linda; Zingone, Adriana; Metfies, Katja.
Protists (microbial eukaryotes) are diverse, major components of marine ecosystems, and are fundamental to ecosystem services. In the last 10 years, molecular studies have highlighted substantial novel diversity in marine systems including sequences with no taxonomic context. At the same time, many known protists remain without a DNA identity. Since the majority of pelagic protists are too small to identify by light microscopy, most are neither comprehensively or regularly taken into account, particularly in Long-term Ecological Research Sites. This potentially undermines the quality of research and the accuracy of predictions about biological species shifts in a changing environment. The ICES Working Group for Phytoplankton and Microbial Ecology conducted...
Tipo: Text
Palavras-chave: Protists; Long-term Ecological Research Station; Molecular; Time-series; Questionnaire; Literature survey.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00455/56708/58470.pdf

Extensive wet episodes in Late Glacial Australia resulting from high-latitude forcings
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bayon, Germain; De Deckker, Patrick; Magee, John W.; Germain, Yoan; Bermell, Sylvain; Tachikawa, Kazuyo; Norman, Marc D.
Millennial-scale cooling events termed Heinrich Stadials punctuated Northern Hemisphere climate during the last glacial period. Latitudinal shifts of the intertropical convergence zone (ITCZ) are thought to have rapidly propagated these abrupt climatic signals southward, influencing the evolution of Southern Hemisphere climates and contributing to major reorganisation of the global ocean-atmosphere system. Here, we use neodymium isotopes from a marine sediment core to reconstruct the hydroclimatic evolution of subtropical Australia between 90 to 20 thousand years ago. We find a strong correlation between our sediment provenance proxy data and records for western Pacific tropical precipitations and Australian palaeolakes, which indicates that Northern...
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00375/48585/48906.pdf

Removal of pathogens by ultrafiltration from sea water
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cordier, Clémence; Stavrakakis, Christophe; Morga, Benjamin; Degrémont, Lionel; Voulgaris, Alexandra; Bacchi, Alessia; Sauvade, Patrick; Coelho, Franz; Moulin, Philippe.
Among water treatment processes, ultrafiltration is known to be efficient for the elimination of micro-organisms (bacteria and viruses). In this study, two pathogens were targeted, a bacterium, Vibrio aestuarianus and a virus, OsHV-1, with the objective to produce high quality water from seawater, in the case of shellfish productions. The retention of those microorganisms by ultrafiltration was evaluated at labscale. In the case of OsHV-1, the protection of oysters was validated by in vivo experiments using oysters spat and larvae, both stages being highly susceptible to the virus. The oysters raised using contaminated seawater which was then subsequently treated by ultrafiltration, had similar mortality to the negative controls. In the case of V....
Tipo: Text
Palavras-chave: Ultrafiltration; Biosecurisation; Pathogen retention; Sea water; OsHV-1; Shellfish production.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00634/74576/74466.pdf

Etude de la nocivité d'huiles polydimethylsiloxane à l'égard d'organismes marins
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Maggi, Pierre; Alzieu, Claude.
La majorité des pays riverains de la mer du Nord, de l'Atlantique et de la Méditerranée se sont engagés, par différents accords internationaux, à interdire les déversements et rejets en mer de substances nocives. C'est ainsi que parallèlement à certains métaux lourds et produits organohalogénés réputés toxiques et accumulables, les composés organosiliciés font l'objet d'une interdiction d'immersion lorsqu'ils sont toxiques et non biodégradables.
Tipo: Text
Ano: 1977
URL: http://archimer.ifremer.fr/doc/1977/publication-7130.pdf

Dispersal of organisms at deep-sea hydrothermal vents: A review
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lutz, R A.
Modes of larval dispersal at hydrothermal vent sites (21 degree N, 13 degree N and the Galapagos Rift) have been inferred for mollusks from the morphology of the larval shell. Only three have morphologies indicative of planktotrophic development (one mytilid and two turrids); the larval development of the remaining species appears to be nonplanktotrophic. Among the hydrothermal vent crustaceans, two (the galatheids Munidopsis cf. subsquamosa and Minidopsis lentigo ) appear to have nonplanktotrophic development, whereas both the brachyuran Bythograea thermydron and the caridean shrimp Alvinocaris lusca apparently have widely dispersing planktotrophic larval stages. Results for polychaetes suggest a similar variety of reproductive adaptations. Although a few...
Tipo: Text
Ano: 1988
URL: http://archimer.ifremer.fr/doc/00267/37831/35912.pdf

Synthèse des données de l’Observatoire Pelagis au sein du PNM de l’Estuaire de la Gironde et de la mer des Pertuis et de la ZPS Pertuis charentais-Rochebonne
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Laran, Sophie; Dorémus, Ghislain; Van Canneyt, Olivier; Authier, Matthieu; Spitz, Jérôme.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00598/70968/69197.pdf

Mise en evidence d'une microsporidie parasite de Marteilia refringens agent de la maladie de la glande digestive de Ostrea edulis L.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Comps, Michel; Pichot, Yves; Deltreil, Jean-pierre.
Tipo: Text
Palavras-chave: Ostrea Edulis L.; Digestive Gland; Marteilia Refringens; Cytology; Parasitology.
Ano: 1980
URL: http://archimer.ifremer.fr/doc/1980/publication-1945.pdf

Extension de l'atlas des apports hydriques 2011-2017 à l'échelle de la Grande Terre
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bourassin, Emmanuel; Bruyere, Oriane; Le Gendre, Romain; Soulard, Benoit.
Ce rapport fait partie du projet de recherche PRESENCE (PRESions sur les Ecosystèmes récifo-lagonaires de Nouvelle-CalédoniE). L’objectif général de ce projet est de mieux appréhender le fonctionnement des lagons de Nouvelle-Calédonie à partir d’observations in-situ, de télédétection et de modélisation. Une des tâches de PRESENCE consiste notamment à étudier via des modèles hydrodynamiques le devenir des apports terrigènes au sein des lagons, et cela à l’échelle de la Grande Terre. Ce rapport présente la méthodologie utilisée et les données produites pour compléter le travail effectué lors de la création de l’Atlas 2011-2017 des apports hydriques à l’échelle du territoire calédonien (Lalau et al., 2019). En effet, ce premier rapport ne présentant qu’un...
Tipo: Text
Palavras-chave: Bassins versants; Nouvelle-Calédonie; Débits; Crues; Apports terrigènes; Grande Terre.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00678/78970/81374.pdf

A unified deep-to-shallow water wave-breaking probability parameterization
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Filipot, Jean-francois; Ardhuin, Fabrice; Babanin, Alexander V.
Breaking probabilities and breaking wave height distributions (BWHDs) in deep, intermediate, and shallow water depth are compared, and a generic parameterization is proposed to represent the observed variability of breaking parameters as a function of the nondimensional water depth. In intermediate and deep water, where waves of different scales may have markedly different breaking probabilities, a BWHD as a function of wave frequency is proposed and validated with intermediate-depth and deep water observational data. The current study focuses on waves with frequencies between 0.55 and 3.45 times the peak frequency f(p). For the dominant frequency, the integration of the frequency-dependent BWHD provides a breaking probability that reproduces the known...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00030/14098/11330.pdf

Cadre morphologique de la Baie des Anges (Nice-Côte d'Azur) : modèle d'instabilité de pente continentale
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pautot, Guy.
A revised bathymetric chart of the Baie des Anges of Nice-Côte d'Azur has been produced using the Sea-Beam multibeam echo-sounder.  The narrow beams of this new system and precision radionavigation techniques have resulted in seven charts at a scale of 1/10 000 with a contour intervals of 10m. The analysis of these charts delineates the principal morphologic units of the region : two active canyons (the Var and the Paillon), two sedimentary ridges extending from Cape Antibes and Cape Ferrat, a coastal sediment fan and a fossil deltaic system. The entire area appears to be undergoing erosion at present, principally by gravity mass movements. [NOT CONTROLLED OCR]
Tipo: Text
Ano: 1981
URL: http://archimer.ifremer.fr/doc/1981/publication-5319.pdf

L'économie de la pêche - Participez à l'enquête !
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer.
Cette plaquette de communication présente l'action "Données économiques" du Système d'Informations Halieutiques de l'Ifremer. Elle est destinée au grand public, et tout particulièrement aux professionnels de la pêche qui sont sollicités chaque année pour participer à l'enquête nationale sur les données économiques dans le secteur des pêches maritimes.  Elle donne des éléments d'informations sur : - le Système d'Informations Halieutiques de l'Ifremer - les informations économiques recherchées et leur utilité - le devenir des données économiques collectées - quelques chiffres clés de la situation socio-économiques de la pêche (en 2013) - la confidentialité des données
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00349/46054/45972.pdf

Survival of Desulfotomaculum spores from estuarine sediments after serial autoclaving and high-temperature exposure
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: O'Sullivan, Louise A.; Roussel, Erwan; Weightman, Andrew J.; Webster, Gordon; Hubert, Casey R. J.; Bell, Emma; Head, Ian; Sass, Henrik; Parkes, R. John.
Bacterial spores are widespread in marine sediments, including those of thermophilic, sulphate-reducing bacteria, which have a high minimum growth temperature making it unlikely that they grow in situ. These Desulfotomaculum spp. are thought to be from hot environments and are distributed by ocean currents. Their cells and spores upper temperature limit for survival is unknown, as is whether they can survive repeated high-temperature exposure that might occur in hydrothermal systems. This was investigated by incubating estuarine sediments significantly above (40–80 °C) maximum in situ temperatures (~23 °C), and with and without prior triple autoclaving. Sulphate reduction occurred at 40–60 °C and at 60 °C was unaffected by autoclaving. Desulfotomaculum sp....
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00216/32759/31181.pdf

Pb, Zn, Cs, Sc and rare earth elements as tracers of the Loire and Gironde particles on the Biscay shelf (SW France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Jouanneau, Jm; Weber, O; Grousset, Fe; Thomas, B.
The western Atlantic continental margin of the Bay of Biscay is characterised by a combined macro-tidal and a high energy environment. These conditions are responsible for the essentially sandy sedimentary cover along with well-defined fine deposit zones observed on the shelf. The main continental sources are the Loire, Gironde and Adour Rivers. It is estimated that 2.4 to 2.5 million tons of fine sediments are supplied annually to the ocean from these rivers of the French Atlantic coast. The Gironde and the Loire contribute with 84 % and the Gironde with 60 % of this amount. Previous studies of the distribution of the clay mineral assemblages and of oligo-elements have distinguished two provinces (north and south Biscay areas) according to these riverine...
Tipo: Text
Palavras-chave: Sédiment fin; Source; Métaux traces; Terre rare; Golfe de Gascogne; Fine-grained sediment; Origin; Heavy metal; Rare earth element; Bay of Biscay.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00326/43682/43192.pdf

State of the Climate in 2016
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Arndt, D. S.; Blunden, J.; Dunn, R. J. H.; Aaron-morrison, Arlene P.; Abdallah, A.; Ackerman, Steven A.; Adler, Robert; Alfaro, Eric J.; Allan, Richard P.; Allan, Rob; Alvarez, Luis A.; Alves, Lincoln M.; Amador, Jorge A.; Andreassen, L. M.; Arce, Dayana; Argueez, Anthony; Arndt, Derek S.; Arzhanova, N. M.; Augustine, John; Awatif, E. M.; Azorin-molina, Cesar; Baez, Julian; Bardin, M. U.; Barichivich, Jonathan; Baringer, Molly O.; Barreira, Sandra; Baxter, Stephen; Beck, H. E.; Becker, Andreas; Bedka, Kristopher M.; Behrenfeld, Michael J.; Bell, Gerald D.; Belmont, M.; Benedetti, Angela; Bernhard, G. H.; Berrisford, Paul; Berry, David I.; Bettolli, Maria L.; Bhatt, U. S.; Bidegain, Mario; Biskaborn, B.; Bissolli, Peter; Bjerke, J.; Blake, Eric S.; Blunden, Jessica; Bosilovich, Michael G.; Boucher, Olivier; Boudet, Dagne; Box, J. E.; Boyer, Tim; Braathen, Geir O.; Brimelow, Julian; Bromwich, David H.; Brown, R.; Buehler, S.; Bulygina, Olga N.; Burgess, D.; Calderon, Blanca; Camargo, Suzana J.; Campbell, Jayaka D.; Cappelen, J.; Caroff, P.; Carrea, Laura; Carter, Brendan R.; Chambers, Don P.; Chandler, Elise; Cheng, Ming-dean; Christiansen, Hanne H.; Christy, John R.; Chung, Daniel; Chung, E. -s.; Clem, Kyle R.; Coelho, Caio A. S.; Coldewey-egbers, Melanie; Colwell, Steve; Cooper, Owen R.; Copland, L.; Cross, J. N.; Crouch, Jake; Cutie, Virgen; Davis, Sean M.; De Eyto, Elvira; De Jeu, Richard A. M.; De Laat, Jos; Degasperi, Curtis L.; Degenstein, Doug; Demircan, M.; Derksen, C.; Di Girolamo, Larry; Diamond, Howard J.; Dindyal, S.; Dlugokencky, Ed J.; Dohan, Kathleen; Dokulil, Martin T.; Dolman, A. Johannes; Domingues, Catia M.; Donat, Markus G.; Dong, Shenfu; Dorigo, Wouter A.; Drozdov, D. S.; Dunn, Robert J. H.; Duran-quesada, Ana M.; Dutton, Geoff S.; Elkharrim, M.; Elkins, James W.; Epstein, H. E.; Espinoza, Jhan C.; Etienne-leblanc, Sheryl; Famiglietti, James S.; Farrell, S.; Fateh, S.; Fausto, R. S.; Feely, Richard A.; Feng, Z.; Fenimore, Chris; Fettweis, X.; Fioletov, Vitali E.; Flannigan, Mike; Flemming, Johannes; Fogt, Ryan L.; Folland, Chris; Fonseca, C.; Forbes, B. C.; Foster, Michael J.; Francis, S. D.; Franz, Bryan A.; Frey, Richard A.; Frith, Stacey M.; Froidevaux, Lucien; Ganter, Catherine; Gerland, S.; Gilson, John; Gobron, Nadine; Goldenberg, Stanley B.; Goni, Gustavo; Gonzalez, Idelmis T.; Goto, A.; Greenhough, Marianna D.; Grooss, J. -u.; Gruber, Alexander; Guard, Charles; Gupta, S. K.; Gutierrez, J. M.; Haas, C.; Hagos, S.; Hahn, Sebastian; Haimberger, Leo; Hall, Brad D.; Halpert, Michael S.; Hamlington, Benjamin D.; Hanna, E.; Hanssen-bauer, I; Hare, Jon; Harris, Ian; Heidinger, Andrew K.; Heim, Richard R., Jr.; Hendricks, S.; Hernandez, Marieta; Hernandez, Rafael; Hidalgo, Hugo G.; Ho, Shu-peng; Hobbs, William R.; Huang, Boyin; Huelsing, Hannah K.; Hurst, Dale F.; Ialongo, I.; Ijampy, J. A.; Inness, Antje; Isaksen, K.; Ishii, Masayoshi; Jevrejeva, Svetlana; Jimenez, C.; Jin Xiangze,; John, Viju; Johns, William E.; Johnsen, B.; Johnson, Bryan; Johnson, Gregory C.; Johnson, Kenneth S.; Jones, Philip D.; Jumaux, Guillaume; Kabidi, Khadija; Kaiser, J. W.; Kass, David; Kato, Seiji; Kazemi, A.; Kelem, G.; Keller, Linda M.; Kelly, B. P.; Kendon, Mike; Kennedy, John; Kerr, Kenneth; Kholodov, A. L.; Khoshkam, Mahbobeh; Killick, Rachel; Kim, Hyungjun; Kim, S. -j.; Kimberlain, Todd B.; Klotzbach, Philip J.; Knaff, John A.; Kochtubajda, Bob; Kohler, J.; Korhonen, Johanna; Korshunova, Natalia N.; Kramarova, Natalya; Kratz, D. P.; Kruger, Andries; Kruk, Michael C.; Krumpen, T.; Lakatos, M.; Lakkala, K.; Lanckmann, J. -p.; Lander, Mark A.; Landschuetzer, Peter; Landsea, Chris W.; Lankhorst, Matthias; Lantz, Kathleen; Lazzara, Matthew A.; Leuliette, Eric; Lewis, Stephen R.; L'Heureux, Michelle; Lieser, Jan L.; Lin, I-i; Liu, Hongxing; Liu, Yinghui; Locarnini, Ricardo; Loeb, Norman G.; Long, Craig S.; Loranty, M.; Lorrey, Andrew M.; Loyola, Diego; Lu, Mong-ming; Lumpkin, Rick; Luo, Jing-jia; Luojus, K.; Lyman, John M.; Macara, Gregor; Macdonald, Alison M.; Macias-fauria, M.; Malkova, G. V.; Manney, G.; Marchenko, S. S.; Marengo, Jose A.; Marra, John J.; Marszelewski, Wlodzimierz; Martens, B.; Martinez-gueingla, Rodney; Massom, Robert A.; Mathis, Jeremy T.; May, Linda; Mayer, Michael; Mazloff, Matthew; Mcbride, Charlotte; Mccabe, M. F.; Mccarthy, Gerard; Mccarthy, M.; Mcdonagh, Elaine L.; Mcgree, Simon; Mcvicar, Tim R.; Mears, Carl A.; Meier, W.; Mekonnen, A.; Menezes, V. V.; Mengistu Tsidu, G.; Menzel, W. Paul; Merchant, Christopher J.; Meredith, Michael P.; Merrifield, Mark A.; Minnis, Patrick; Miralles, Diego G.; Mistelbauer, T.; Mitchum, Gary T.; Mitro, Srkani; Monselesan, Didier; Montzka, Stephen A.; Mora, Natalie; Morice, Colin; Morrow, Blair; Mote, T.; Mudryk, L.; Muehle, Jens; Mullan, A. Brett; Mueller, R.; Nash, Eric R.; Nerem, R. Steven; Newman, Louise; Newman, Paul A.; Nieto, Juan Jose; Noetzli, Jeannette; O'Neel, S.; Osborn, Tim J.; Overland, J.; Oyunjargal, Lamjav; Parinussa, Robert M.; Park, E-hyung; Pasch, Richard J.; Pascual-ramirez, Reynaldo; Paterson, Andrew M.; Pearce, Petra R.; Pellichero, Violaine; Pelto, Mauri S.; Peng, Liang; Perkins-kirkpatrick, Sarah E.; Perovich, D.; Petropavlovskikh, Irina; Pezza, Alexandre B.; Phillips, C.; Phillips, David; Phoenix, G.; Pinty, Bernard; Pitts, Michael C.; Pons, M. R.; Porter, Avalon O.; Quintana, Juan; Rahimzadeh, Fatemeh; Rajeevan, Madhavan; Rayner, Darren; Raynolds, M. K.; Razuvaev, Vyacheslav N.; Read, Peter; Reagan, James; Reid, Phillip; Reimer, Christoph; Remy, Samuel; Renwick, James A.; Revadekar, Jayashree V.; Richter-menge, J.; Rimmer, Alon; Robinson, David A.; Rodell, Matthew; Rollenbeck, Ruetger; Romanovsky, Vladimir E.; Ronchail, Josyane; Roquet, F.; Rosenlof, Karen H.; Roth, Chris; Rusak, James A.; Sallee, Jean-bapiste; Sanchez-lugo, Ahira; Santee, Michelle L.; Sarmiento, Jorge L.; Sawaengphokhai, P.; Sayouri, Amal; Scambos, Ted A.; Schemm, Jae; Schladow, S. Geoffrey; Schmid, Claudia; Schmid, Martin; Schoeneich, P.; Schreck, Carl J., Iii; Schuur, Ted; Selkirk, H. B.; Send, Uwe; Sensoy, Serhat; Sharp, M.; Shi, Lei; Shiklomanov, Nikolai I.; Shimaraeva, Svetlana V.; Siegel, David A.; Signorini, Sergio R.; Silov, Eugene; Sima, Fatou; Simmons, Adrian J.; Smeed, David A.; Smeets, C. J. P. P.; Smith, Adam; Smith, Sharon L.; Soden, B.; Spence, Jaqueline M.; Srivastava, A. K.; Stackhouse, Paul W., Jr.; Stammerjohn, Sharon; Steinbrecht, Wolfgang; Stella, Jose L.; Stennett-brown, Roxann; Stephenson, Tannecia S.; Strahan, Susan; Streletskiy, Dimitri A.; Sun-mack, Sunny; Swart, Sebastiaan; Sweet, William; Tamar, Gerard; Taylor, Michael A.; Tedesco, M.; Thoman, R. L.; Thompson, L.; Thompson, Philip R.; Timmermans, M. -l.; Timofeev, Maxim A.; Tirnanes, Joaquin A.; Tobin, Skie; Trachte, Katja; Trewin, Blair C.; Trotman, Adrian R.; Tschudi, M.; Tweedy, Olga; Van As, D.; Van De Wal, R. S. W.; Van Der Schalie, Robin; Van Der Schrier, Gerard; Van Der Werf, Guido R.; Van Meerbeeck, Cedric J.; Velicogna, I.; Verburg, Piet; Vieira, G.; Vincent, Lucie A.; Voemel, Holger; Vose, Russell S.; Wagner, Wolfgang; Wahlin, Anna; Walker, D. A.; Walsh, J.; Wang, Bin; Wang, Chunzai; Wang, Junhong; Wang, Lei; Wang, M.; Wang, Sheng-hung; Wanninkhof, Rik; Watanabe, Shohei; Weber, Mark; Weller, Robert A.; Weyhenmeyer, Gesa A.; Whitewood, Robert; Wiese, David N.; Wijffels, Susan E.; Wilber, Anne C.; Wild, Jeanette D.; Willett, Kate M.; Willie, Shem; Willis, Josh K.; Wolken, G.; Wong, Takmeng; Wood, E. F.; Woolway, R. Iestyn; Wouters, B.; Xue, Yan; Yim, So-young; Yin, Xungang; Yu, Lisan; Zambrano, Eduardo; Zhang, Huai-min; Zhang, Peiqun; Zhao, Guanguo; Zhao, Lin; Ziemke, Jerry R.; Zilberman, Nathalie.
In 2016, the dominant greenhouse gases released into Earth's atmosphere-carbon dioxide, methane, and nitrous oxide-continued to increase and reach new record highs. The 3.5 +/- 0.1 ppm rise in global annual mean carbon dioxide from 2015 to 2016 was the largest annual increase observed in the 58-year measurement record. The annual global average carbon dioxide concentration at Earth's surface surpassed 400 ppm (402.9 +/- 0.1 ppm) for the first time in the modern atmospheric measurement record and in ice core records dating back as far as 800000 years. One of the strongest El Nino events since at least 1950 dissipated in spring, and a weak La Nina evolved later in the year. Owing at least in part to the combination of El Nino conditions early in the year and...
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00673/78500/80851.pdf

In Situ Detection of Macronutrients and Chloride in Seawater by Submersible Electrochemical Sensors
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cuartero, Maria; Crespo, Gaston; Cherubini, Thomas; Pankratova, Nadezda; Confalonieri, Fabio; Massa, Francesco; Tercier-waeber, Mary-lou; Abdou, Melina; Schafer, Jorg; Bakker, Eric.
A new submersible probe for the in situ detection of nitrate, nitrite and chloride in seawater is presented. Inline coupling of a desalination unit, an acidification unit and a sensing flow cell containing all-solid-state membrane electrodes allows for the potentiometric detection of nitrate and nitrite after removal of the key interfering ions in seawater, chloride and hydroxide. Thus, the electrodes exhibited attractive analytical performances for the potentiometric detection of nitrate and nitrite in desalinated and acidified seawater: fast response time (t95&lt;12 s), excellent stability (long-term drifts of &lt; 0.5 mV h-1), good reproducibility (calibration parameter deviation of &lt; 3 %) and satisfactory accuracy (uncertainties &lt; 8 %Diff...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00431/54230/55554.pdf

Tables pour le dénombrement des micro-organismes après culture (milieux solides). Extension à la recherche
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Campello, Francois.
The listing of microorganisms in general, and of coliforms, amongst others, through the counting of the colonies obtained at 30°C, has been the focus of some AFNOR norms, respectively V 08-011 and V 08-015, which set their general guidelines. The adaptation of these norms to research works drove us to write some notes about the display of the charts, based on these guidelines and enabling the direct reading of the results according to the number of units at the origin of the colonies ("Plaque forming unit: P.F.U.").
Tipo: Text
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/rapport-4580.pdf

Structures trophiques et production secondaire dans les réseaux benthiques intertidaux du bassin de Marennes-Oléron : utilisation du traçage isotopique naturel
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kang, Chang-keun.
Trophic structure in intertidal benthic food webs of Marennes-Oléron Bay was eval uated using stable carbon and nitrogen isotope ratios. Isotopie composition of the commonesr 40 species reveals no evidences for the contribution of terrestrial detritus to the intertidal consumers. The isotopic composition of primary (suspension- and deposit-feeders) and secondary consumers (predators and scavengers) indicated that their major carbon sources were originated from phytoplankton and microphytobenthos on aIl intertidal flats. The relative importance of both sources was determined by feeding strategies but microphytobenrhos is always the main diet for all species. Some isotopic signatures for additional food sources were also found in soem habitats indieating...
Tipo: Text
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00439/55017/56455.pdf

Contribution à l'étude des cumacé de profondeur en atlantique : le genre Diastyloides Sars, 1900
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Reyss, Daniel.
Genus Diastyloides Sars, 1900, is characterized by a mandible which is truncated at its base (type Leuconidae) that it is the only one to possess in the Diastylidae family. Known to this day by 5 species, its distribution area seems to be limited to the northern Atlantic Ocean, from Norway to the Mediterranean Sea. The study of the material collected during more recent cruises enabled us to extend this distribution area and lead to the description of two new species.
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1973
URL: http://archimer.ifremer.fr/doc/1973/publication-5137.pdf

Coastal Ocean Forecasting: system integration and evaluation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kourafalou, V. H.; De Mey, P.; Le Henaff, M.; Charria, Guillaume; Edwards, C. A.; He, R.; Herzfeld, M.; Pascual, A.; Stanev, E. V.; Tintore, J.; Usui, N.; Van Der Westhuysen, A. J.; Wilkin, J.; Zhu, X.
Recent advances in Coastal Ocean Forecasting Systems (COFS) are discussed. Emphasis is given in the integration of the observational and modeling components, each developed in the context of monitoring and forecasting in the coastal seas. These integrated systems must be linked to larger scale systems toward seamless data sets, nowcasts and forecasts (from the global ocean, through the continental shelf and to the nearshore regions). Emerging capabilities include: methods to optimize coastal/regional observational networks; and probabilistic approaches to address both science and applications related to COFS. International collaboration is essential to exchange best practices, achieve common frameworks and establish standards.
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00242/35281/83231.pdf

Characterisation of the spoilage microbiota in raw salmon (Salmo salar) steaks stored under vacuum or modified atmosphere packaging combining conventional methods and PCR–TTGE
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mace, Sabrina; Cornet, Josiane; Chevalier, Frederique; Cardinal, Mireille; Pilet, Marie-france; Dousset, Xavier; Joffraud, Jean-jacques.
In order to characterise the spoilage related to microbiota of raw salmon, a combination of culture-dependent and -independent methods, including PCR–TTGE, was used to analyse 3 raw salmon batches stored for 3 days at chilled temperature in modified atmosphere packaging (MAP) (50% CO2/50% N2) or under vacuum. Sensory evaluation, microbiological enumeration and chemical analysis were performed after 3, 7 and 10 days of storage. At the onset of spoilage, 65 bacterial isolates were picked from the plates. Thus, 13 different genera or species were identified by phenotypic and molecular tests: Serratia spp., Photobacterium phosphoreum, Yersinia intermedia, Hafnia alvei, Buttiauxella gaviniae, Pseudomonas sp., Carnobacterium maltaromaticum, Carnobacterium...
Tipo: Text
Palavras-chave: Seafood; Culture-independent method (PCR-TTGE); Sensory analysis; Photobacterium phosphoreum; Lactococcus piscium.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00052/16277/13779.pdf

Campagne Seamewe 2: Reconnaissance de trace de cable sous-marin dans l'Ocean Indien
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Auffret, G A; Bertron, M; Butin, A; Bourillet, J F; Pelle, H; Saget, P; Carre, D; Quentel, J; Uchard, N.
Cruise Seamewe 2 has been devoted to the survey of the projected track of a telecommunication cable on a distance of 2300 miles between Djibouti and Colombo. Supplementary data relevant to Djibouti approaches (side scan survey) and the areas were obtained during Leg 1 of Seamewe. The survey involves the seabeam for bathymetry and a mud penetrator 3.5 KHz with a correlator for determination of the acoustic character of the sea floor. Magnetism and gravimetry have been also recorded on most of the surveyed tracks. The near-bottom water temperature had also to be checked in a number of stations.
Tipo: Text
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00268/37907/35988.pdf

MD 168 / AMOCINT IMAGES XVII on board R/V Marion Dufresne
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kissel, C; Kleiven, H; Morin, X; The Shipboard Scientific Party,.
Tipo: Text
Ano: 2008
URL: https://archimer.ifremer.fr/doc/00500/61158/64603.pdf

Travaux ISTPM 1954 - Gadiformes - Merlan, morue, merlu
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Dans le tonnage de merlans pêchés par les pays du nord et de l'ouest de l'Europe, la France occupe le second rang, après l'Écosse; elle récolte entre le quart et le cinquième des pêches européennes. [OCR NON CONTRÔLE]
Tipo: Text
Ano: 1954
URL: http://archimer.ifremer.fr/doc/1954/publication-6720.pdf

Deep-Arvor: a profiling float for deep sea applications
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Reste, Serge; Thierry, Virginie; Dutreuil, Vincent; Andre, Xavier; Lenault, Yannick.
The deep-Arvor profiling float has been designed by Ifremer. It is based on the Arvor technology, and can do 150 profiles at 4000 dbars. This poster gives the main features of the deep-Arvor profiling float, its qualification method, results at sea and information on its industrialization.
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00222/33369/31774.pdf

Intraseasonal variability of mixed layer depth in the tropical Indian Ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Keerthi, M. G.; Lengaigne, M.; Drushka, K.; Vialard, J.; De Boyer Montegut, Clement; Pous, Stephane; Levy, M.; Muraleedharan, P. M.
In this paper, we use an observational dataset built from Argo in situ profiles to describe the main large-scale patterns of intraseasonal mixed layer depth (MLD) variations in the Indian Ocean. An eddy permitting (0.25A degrees) regional ocean model that generally agrees well with those observed estimates is then used to investigate the mechanisms that drive MLD intraseasonal variations and to assess their potential impact on the related SST response. During summer, intraseasonal MLD variations in the Bay of Bengal and eastern equatorial Indian Ocean primarily respond to active/break convective phases of the summer monsoon. In the southern Arabian Sea, summer MLD variations are largely driven by seemingly-independent intraseasonal fluctuations of the...
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00332/44335/45788.pdf

Microparticulate diets as first food for gilthead sea bream larva (Sparus aurata): study of fatty acid incorporation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Robin, Jean; Vincent, Benoit.
Recent advances have led to the development of inert diets for first-feeding marine fish larvae. The purpose of the present study was to evaluate fatty acid (FA) incorporation into larva using practical-type and semipurified diets as first food for larvae. Experimental microparticulate diets were fed to gilthead sea bream larvae, right from the mouth opening to day 21 post hatching. Five basal diets were compared, using fish meat or casein as main protein sources, and fish protein concentrate or casein hydrolysates and algae powder (Schizochytrium). Diets contained soybean lecithin to provide polar lipids and this also provided a high linoleic acid (18:2n-6) content. n-3 HUFA (1.5-1.7% DM) were mainly in dietary neutral lipids, with a part in polar lipids...
Tipo: Text
Palavras-chave: Sparus aurata; Inert diet; Fatty acids; Larva; Fish.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/publication-499.pdf

Monitoring viral contamination of molluscan shellfish
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pommepuy, Monique; Le Saux, Jean-claude; Hervio Heath, Dominique; Le Guyader, Soizick.
Infectious diseases linked to the consumption of raw shellfish like oysters, mussels, cockles and clams, have long been identified. Bacterial diseases such as cholera and typhoid fever were the first to be suspected of being linked to consumption of contaminated shellfish (Butt et al., 2004). During the past century, various strategies have been established in shellfish growing areas throughout the world to assure the sanitary quality of shellfish. More recently, despite sanitary surveys, Vibrio parahaemolyticus, Vibrio vulnificus and enteric viruses - especially Hepatitis A virus (HAV) and norovirus (NoV) – were found to be associated in outbreaks of human illness.
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00015/12607/9485.pdf

Changes in seabed morphology, mud temperature and free gas venting at the Håkon Mosby mud volcano, offshore northern Norway, over the time period 2003-2006
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Foucher, Jean-paul; Dupre, Stephanie; Scalabrin, Carla; Feseker, Tomas; Harmegnies, Francois; Nouze, Herve.
The Håkon Mosby mud volcano is a 1.5-km-diameter geological structure located on the Southwest Barents Sea slope at a water depth of 1,270 m. High-definition seabed mapping of the mud volcano has been carried out in 2003 and 2006. A comparative analysis of the bathymetry and backscatter maps produced from the two surveys shows subtle morphological changes over the entire crater of the mud volcano, interpreted to be the consequence of mud eruption events. Mud temperature measurements point to a persistently warm mud at shallow depth in the crater. This is explained by upward fluid advection, rather than conductive cooling of mud flows. The small-scale spatial variability in the temperature distribution may be related to mud outflows or changes in the fluid...
Tipo: Text
Palavras-chave: Sw barents sea; Cold seep ecosystems; Fluid flow; Methane; Sediment; Onshore; Fluxes; Margin; Water.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00004/11527/10261.pdf

Closure to "Characterization and Engineering Properties of Dry and Ponded Class-F Fly Ash" by R. C. Bachus, M. Terzariol, C. Pasten, S. H. Chong, S. Dai, M. S. Cha, S. Kim, J. Jang, E. Papadopoulos, S. Roshankhah, L. Lei, A. Garcia, J. Park, A. Sivaram, F. Santamarina, X. Ren, and J. C. Santamarina
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Terzariol, Marco; Park, Junghee; Santamarina, J. Carlos.
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00661/77262/78700.pdf

Experimental evaluation of co-culture of juvenile sea cucumbers, Holothuria scabra (Jaeger), with juvenile blue shrimp, Litopenaeus stylirostris (Stimpson)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Purcell, S; Patrois, Jacques; Fraisse, N.
The co-culture of juvenile sea cucumber Holothuria scabra (Jaeger), or 'sandfish', with juvenile blue shrimp Litopenaeus stylirostris (Stimpson) was tested by growing groups in co-culture and monoculture for 3 weeks in tanks with enriched sand substratum. Feed was supplied on trays, accessible only to shrimp. Survival of shrimp and sandfish was high in all treatments (73-100%). Growth of shrimp did not differ between monoculture and co-culture, but sandfish grew significantly slower in co-culture (P=0.03), although their sand burying and surface foraging were apparently unaffected by shrimp (P=0.76). However, shrimp increased the levels of total ammonia-N in tanks, which related inversely with sandfish growth (P=0.04). Conversely, sandfish did not appear...
Tipo: Text
Palavras-chave: Burying behaviour; Ammonia; Sandfish; Holothurian; Polyculture.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1356.pdf

Variations annuelles de la teneur en matières grasses de trois clupéides du Sénégal (Ethmalosa fimbriata BOWDICH, sardinella EBA C.V., sardinella aurita C. V.)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mainguy, P; Doutre, M.
In accordance with our original goal, this first study enabled us to find, for lack of previous data, the main aspects of the annual variations of the fat rate in the three most economically important herrings in Senegal. This exploration work forms an essential basis to set our future research protocols. It enabled us to specify the number of samples needed and their time distribution, in order to determine more precisely the annual biochemical variations of the studied fishes. The study of the biochemical transformations according to the environment also enabled us to foresee the existence of some correlations we aim to clarify in the future.
Tipo: Text
Ano: 1958
URL: http://archimer.ifremer.fr/doc/1958/publication-4633.pdf

Distribution chronologique des poissons dans deux stations de la lagune Ria Formosa (Portugal)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Monteiro, C; Hoai, Tl; Lasserre, G.
Tipo: Text
Ano: 1987
URL: http://archimer.ifremer.fr/doc/00108/21912/19503.pdf

Evolution of Blennioidel in the Mediterranean Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Zander, C. Dieter.
The evolution of 2 spp belonging to the gen Tripterygion and some spp of the gen Blennius is discussed. Tripterygion tripteronotus and T. xanthosoma have very similar morphological characters yet live in 2 distinct niches. This probably results from 2 separate immigrations into the Mediterranean at different eras after the glacial age. After establishing reproductive barriers these populations would have evolved into 2 distinct spp. In contrast the spp of the gen Blennius were endemic in the Mediterranean and their evolution must have taken place after the end of the glacial age. During this lapse of time, multiple differentiations which might have taken place would account for the presence of sibling spp having comparable morphological characters but...
Tipo: Text
Palavras-chave: Mediterranean Sea; Geographical distribution; Morphology; Phylogeny; Blenniidei.
Ano: 1973
URL: http://archimer.ifremer.fr/doc/1973/publication-2166.pdf

Etude du comportement geochimique du fer dans l'estuaire de la Seine
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guegueniat, P; Boust, D; Gandon, R; Hemon, G; Phillipot, J; Sanchez, J; Marin, P; Pieri, J.
This paper reports the study of iron geochemical behavior by the measurement of total iron, iron associated with mineral coat, and ratio FEII/FEIII. The results of total iron are exploited by normalisation with regard to aluminium and scandium.
Tipo: Text
Palavras-chave: River discharge; Sediments; Suspended particulate matter; Ion association; Iron; Geochemical cycle.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1301.pdf

Statistique des régions de pêches. Année 1924 (2e semestre)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Tipo: Text
Ano: 1925
URL: http://archimer.ifremer.fr/doc/00017/12822/9769.pdf

Infections à virus de type herpes chez les bivalves : large spectre d'hôte et détection au stade adulte
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Arzul, Isabelle; Renault, Tristan.
In 1972, Farley reported the presence of herpes-type viral particles in adult American oysters (Crassostrea virginica) for the first time. Since then, this pathogen has been detected in various marine bivalve species, usually associated with massive mortality events. To date, herpes-type viruses have been detected in the following species: C gigas, Ostrea edulis, O. angasi, Tiostrea chilensis, Ruditapes decussatus, R. philippinarum and most recently, Pecten maximus.
Tipo: Text
Palavras-chave: Pathogènes; Bivalves; Herpesvirus; Herpesviridae.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/acte-3266.pdf

Modulation of Ka-Band Doppler Radar Signals Backscattered From the Sea Surface
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Yurovsky, Yury Yu.; Kudryavtsev, Vladimir N.; Chapron, Bertrand; Grodsky, Semyon A.
This paper presents dual copolarized (VV and HH) Ka-band radar measurements of joint modulation of normalized radar crass section (NRCS) and Doppler velocity (DV) performed from a sea research platform. NRCS and DV modulations are well correlated. NRCS modulations exhibit a spiky structure. HH modulations are stronger than VV ones leading to modulations of the polarization ratio. This suggests that an important portion of NRCS modulations is produced by nonpolarized radar returns from modulated wave breaking facets. DV modulations reveal that at incidence angles &lt;50 degrees, NRCS spikes are attributable to rather slow moving facets, which may he interpreted as short wave breaking disturbances embedded in the water at crests of modulating waves. Using...
Tipo: Text
Palavras-chave: Doppler shift; Modulation transfer function (MTF); Radar backscattering; Sea surface; Spikes; Wave breaking.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00440/55156/56750.pdf

Impact of oceanic processes on the carbon cycle during the last termination
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bouttes, N.; Paillard, D.; Roche, D. M.; Waelbroeck, C.; Kageyama, M.; Lourantou, A.; Michel, E.; Bopp, L.
During the last termination (from similar to 18 000 years ago to similar to 9000 years ago), the climate significantly warmed and the ice sheets melted. Simultaneously, atmospheric CO2 increased from similar to 190 ppm to similar to 260 ppm. Although this CO2 rise plays an important role in the deglacial warming, the reasons for its evolution are difficult to explain. Only box models have been used to run transient simulations of this carbon cycle transition, but by forcing the model with data constrained scenarios of the evolution of temperature, sea level, sea ice, NADW formation, Southern Ocean vertical mixing and biological carbon pump. More complex models (including GCMs) have investigated some of these mechanisms but they have only been used to try...
Tipo: Text
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00214/32514/31004.pdf

Recirculating aquaculture system (RAS) biofilters: focusing on bacterial communities complexity and activity
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Interdonato, Filippo.
This research has been carried out in order to better understand the relationships between bacterial communities, established within the biofilter of a recirculating aquaculture system, and the influence exerted by forcing factors on the system itself. The work was divided into three main objectives that were aimed at studying: - the composition of the metabolically active bacterial fraction through the construction of cDNA clone libraries and the application of fingerprinting techniques (e.g., the T-RFLP); - the effect of particulate organic carbon on both the nitrification process and the microbial communities in different types of biological filters; - the effect of a moderate increase in the oxidation-reduction potential (ORP), through the injection of...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00074/18516/16060.pdf

How moderate sea states can generate loud seismic noise in the deep ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Obrebski, Mathias; Ardhuin, Fabrice; Stutzmann, E.; Schimmel, M.
The location of oceanic sources of the micrometric ground displacement recorded at land stations in the 0.1-0.3 Hz frequency band ("double frequency microseisms") is still poorly known. Here we use one particularly strong noise event in the Pacific to show that small swells from two distant storms can be a strong deep-water source of seismic noise, dominating temporarily the signals recorded at coastal seismic stations. Our interpretation is based on the analysis of noise polarization recorded all around the source, and the good fit achieved for this event and year-round between observed and modeled seismic data. The model further suggests that this is a typical source of these infrequent loud noise bursts, which supports previous inconclusive evidences of...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00085/19625/17262.pdf

Description and modeling of polyurethane hydrolysis used as thermal insulation in oil offshore conditions
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Gac, Pierre-yves; Choqueuse, Dominique; Melot, D.
Polymers are widely used for passive thermal insulation coatings on steel pipe in offshore oil and gas production. In this industry, structures used in deep sea have to be reliable, as they are in service for more than 20 years in a very severe environment: sea water, hydrostatic pressure and temperature gradient. One of the main questions is how to test and predict the lifetime of such structures in the laboratory? This study presents one approach that has been developed to characterize and predict the degradation of polymers used as thermal insulation materials.  This paper is dedicated to polyurethane (polyether based) degradation in sea water at high temperature. Ageing has been performed in natural sea water under hydrostatic pressure at temperatures...
Tipo: Text
Palavras-chave: Polyurethane; Hydrolysis; Accelerated ageing; Sea water; Coating; Offshore.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00160/27132/25330.pdf

Late Quaternary climatic changes revealed by luminescence dating, mineral magnetism and diffuse reflectance spectroscopy of river terrace palaeosols: a new form of geoproxy data for the southern African interior
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lyons, Richard; Tooth, Stephen; Duller, Geoff A. T.
The nature, spatial patterns and forcing mechanisms of Quaternary climatic changes across southern Africa remain unresolved and contentious, principally due to the scarcity of continuous and robustly-dated proxy records. We present what we interpret to be a broadly continuous record of late Quaternary climatic change based on optically stimulated luminescence (OSL) dating, and mineral magnetic and diffuse reflectance spectroscopy (DRS) analyses of stacked palaeosols within an overbank alluvial succession along the Modder River, central South Africa. The OSL ages indicate that alluvial sedimentation occurred at a fairly steady rate, averaging similar to 0.15 mm/yr from at least 44 ka until similar to 0.83 ka. This suggests that the palaeosols are...
Tipo: Text
Palavras-chave: Erfkroon; Southern Africa; Palaeosol; OSL; Quaternary; Mineral magnetism.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00290/40120/39120.pdf

Fishing effects on the diversity dynamics of demersal fish communities. Comparative analysis of the role of the interactions between specices in the Bay of Biscay and in the Gulf of Lion (France).
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Blanchard, Fabian.
This work deals with the fishing effects on the diversity dynamics of demersal fish communities, focusing on the biotic interactions. Multispecies indices were used in order to characterise the demersal fish community dynamics of the Bay of Biscay and of the Gulf of Lions. These are the diversity indices, the temporal variability of the total biomass and of the slope of the number size spectra and the slope of the species-area curves (spatial segregation). The data were provided by yearly bottom trawl surveys EVHOE, CHALIST and MEDITS carried out in these two areas since 1983 by IFREMER for stock assessment. The differences between areas are related to a fishing index (mean value of the annual landings of demersal fish per surface area). Other areas are...
Tipo: Text
Palavras-chave: Demersal fish; ANE; Bay of Biscay; Gulf of Lions; Fish communities; Fishing impact; Biodiversity; Biotic interactions; Spatial segregation; Biomass variability; Size spectrum.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00000/10248/7688.pdf

Résumé graphique des diagnostics et avis émis par le CIEM en 2018
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Biseau, Alain.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00502/61370/64986.pdf

Flux de carbone en milieu pelagique de Mediterranee occidentale lors de la floraison printaniere
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Jacques, G.
Data from the Mediprod 1 cruise (March-April 1969), together with the appropriate conversion factors, were used to calculate carbon flux in the pelagic ecosystem, following fertilization due to vertical winter mixing. In the space of one month, 13.7 gC multiplied by m super(-2) are produced by the phytoplankton, one quarter (3.4 gC multiplied by m super(-2)) of which corresponds to a rapid regeneration of nutrients within the euphotic layer mainly by the way of zooplankton. One quarter of the production (3.4 gC multiplied by m super(-2)) is used by the phytoplankton to increase its biomass. The remainder of the photosynthetic carbon (10.3 gC multiplied by m super(-2)) is exported outside the primary producers box. About one half (5.2 gC multiplied by m...
Tipo: Text
Ano: 1988
URL: http://archimer.ifremer.fr/doc/00267/37790/35871.pdf

Captures accidentelles de mammifères marins sur les filets calés en Manche : Observations réalisées dans le cadre de la première année de réalisation du projet FilManCet (Novembre 2008- Octobre 2009)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Morizur, Yvon; Gaudou, Olivier; Miossec, Dominique; Leblond, Emilie; Toulhoat, Lucile; Gamblin, Caroline.
Up to now there has been no strong investigation on bycatch of marine mammals in the French set net fisheries of the English Channel (ICES areas VIIe,d &amp;IVc) as the EC 812/2004 regulation does not oblige the state members to put observers on board of vessels in the ICES area VII. A study named FilManCet has been started end 2008-beginning 2009 to focus on the bycatch occurring on the set net vessels issued from Boulogne and Dunkerque ports (fisheries in VIId&amp;IVc) and from the ports of North of Brittany. In this study which is conducted by the Fishing Industry, the data are made available to the scientists of Ifremer who has prepared also the sampling scheme for observation at sea. Two observers are employed full time in the North of France coasts...
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00004/11524/8105.pdf

Wind induced upwellings in the gulf of lions
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Millot, Claude.
Continental shelf dynamics have been observed since 1974 in the Gulf of Lions (NorthWestern Mediterranean Sea), with the principal aim of understanding the sumrner circulation in this region. From satellite infrared data, current meters, thermistor chains, and tidal gauge records, it appears that the major events occurring on the continental shelf take the form of wind-induced mesoscale phenomena. These phenomena, which are connected with strong and transient coastal upwellings, are generated by NorthWesterly winds, the mistral and the tramontane, which are highly transient in speed, with a stable direction and a short lifetime. These specifie features have enabled us to investigate the transient response of the sea on about ten such occasions per typical...
Tipo: Text
Palavras-chave: Upwelling côtier; Plateau continental; Golfe du Lion; Coastal upwelling; Continental shelf; Gulf of Lions.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/00122/23335/21159.pdf

Vertical distribution of chlorophyll &lt;I&gt;a&lt;/I&gt; concentration and phytoplankton community composition from in situ fluorescence profiles: a first database for the global ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sauzede, R.; Lavigne, H.; Claustre, H.; Uitz, J.; Schmechtig, C.; D'Ortenzio, F.; Guinet, C.; Pesant, S.
In vivo chlorophyll a fluorescence is a proxy of chlorophyll a concentration, and is one of the most frequently measured biogeochemical properties in the ocean. Thousands of profiles are available from historical databases and the integration of fluorescence sensors to autonomous platforms has led to a significant increase of chlorophyll fluorescence profile acquisition. To our knowledge, this important source of environmental data has not yet been included in global analyses. A total of 268 127 chlorophyll fluorescence profiles from several databases as well as published and unpublished individual sources were compiled. Following a robust quality control procedure detailed in the present paper, about 49 000 chlorophyll fluorescence profiles were converted...
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00293/40404/38962.pdf

Taxonomy and toxicity of Prorocentrum from Perhentian Islands (Malaysia), with a description of a non-toxigenic species Prorocentrum malayense sp. nov. (Dinophyceae)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lim, Zhen Fei; Luo, Zhaohe; Lee, Li Keat; Hii, Kieng Soon; Teng, Sing Tung; Chan, Leo Lai; Chomérat, Nicolas; Krock, Bernd; Gu, Haifeng; Lim, Po Teen; Leaw, Chui Pin.
Thirteen isolates of Prorocentrum species were established from the coral reefs of Perhentian Islands Marine Park, Malaysia and underwent morphological observations and molecular characterization. Six species were found: P. caipirignum, P. concavum, P. cf. emarginatum, P. lima, P. mexicanum and a new morphotype, herein designated as P. malayense sp. nov. Prorocentrum malayense, a species closely related to P. leve, P. cf. foraminosum, P. sp. aff. foraminossum, and P. concavum (Clade A sensu Chomérat et al. 2018), is distinguished from its congeners as having larger thecal pore size and a more deeply excavated V-shaped periflagellar area. Platelet arrangement in the periflagellar area of P. malayense is unique, with the presence of platelet 1a and 1b,...
Tipo: Text
Palavras-chave: Diarrhetic shellfish poisoning; ITS2 secondary structure; Morphology; Periflagellar area; Phylogeny.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00485/59650/65985.pdf

A fleet of multiparameter observatories for geophysical and environmental monitoring at seafloor
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Favali, P; Beranzoli, L; D'Anna, G; Gasparoni, F; Marvaldi, Jean; Clauss, G; Gerber, H; Nicot,; Marani, M; Gamberi, F; Millot, C; Finch, E.
Seafloor long-term, multiparameter, single-frame observatories have been developed within the framework of European Commission and Italian projects since 1995. A fleet of five seafloor observatories, built-up starting from 1995 within the framework of an effective synergy among research institutes and industries, have carried out a series of long-term sea experiments. The observatories are able to operate from shallow waters to deep-sea, down to 4000 m w.d., and to simultaneously monitor a broad spectrum of geophysical and environmental processes, including seismicity, geomagnetic field variations, water temperature, pressure, salinity, chemistry, currents, and gas occurrence. Moreover, they can transmit data in (near)-real-time that can be integrated with...
Tipo: Text
Palavras-chave: Geophysical and environmental seabed monitoring; Long term multidisciplinary seafloor observatories.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-3603.pdf

Répartition des Noelaerhabdaceae (nannofossiles calcaires) dans le Quaternaire moyen et supérieur des océans Atlantique et Pacifique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pujos, A; Giraudeau, J.
Calcareous nannofossil assemblages of the family Noelaerhabdaceae have been studied in sediments of seventeen Quaternary cores raised from various climatic areas of the Atlantic and Pacific oceans. These sections display a regular, hiatus-free sedimentation for the last 500000 years. They have been dated using oxygen-isotopic measurements, variations of calcium carbonate content, variations of total nannofossil abundance, thorium measurements and volcanic ash horizons. Coccoliths of the genus Gephyrocapsa have been placed in three distinct taxonomic groups, based on morphological criteria inferred from light-microscope observations. Their acmes, as well as the acme of Emiliania huxleyi, are considered as stratigraphic markers. These markers characterize...
Tipo: Text
Palavras-chave: NOELAERHABDACEAE; CALCAREOUS NANNOFOSSILS; STRATIGRAPHICAL MARKERS; UPPER/MIDDLE QUATERNARY.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00099/21061/18687.pdf

Recherches sur les algues d'intérêt commercial aux antilles Françaises
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Barbaroux, M.
A l'occasion d'un séjour en Martinique, M. Olivier Barbaroux, de l'équipe d'intervention pour les régions tropicales de l'ISTPM à Nantes, a été chargé d'une mission de prospection à Saint Martin, dépendante de la Guadeloupe, pour tenter d'identifier la présence d'algues d'intérêt commercial dans les baies et lagunes de cette Ile et plus particulièrement celles du genre Eucheu : ma recherchées pour leur haute teneur en carraghénane.
Tipo: Text
Ano: 1978
URL: http://archimer.ifremer.fr/doc/00047/15789/13190.pdf

Remarques sur les stades jeunes de la dorade (pagellus centrodontus) capturés à la ligne à la côte
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Priol, E.
Dans la Revue des Travaux de l'Office des Pêches Maritimes (Tome I, Fascicule IV, pp. 5-33), R. OLIVIER, Préparateur au laboratoire de La Rochelle, donne un résumé pratique de nos connaissances sur la dorade.  Dans son travail, OLIVIER traite le poisson adulte, capturé surtout aux accores du golfe de Gascogne.  Les quelques remarques que nous avons faites ont trait aux stades jeunes, immatures de ce même poisson, parfois si abondant le long des côtes Ouest de l'Atlantique, et qui se pêche uniquement à la ligne. [OCR NON CONTRÔLE]
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1932
URL: http://archimer.ifremer.fr/doc/1932/publication-5876.pdf

Etalonnage de la méthode de dénombrement des Escherichia coli par impédancemétrie. Pour la modélisation des processus de contamination chez Mytilus edulis, Crassostrea gigas dans le milieu marin
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Amiaud, Ninon.
Le laboratoire de microbiologie de l'Ifremer LER/PC de La Tremblade en Charente Maritime, est chargé de la surveillance de la production conchylicole* et du contrôle sanitaire des eaux, du littoral du bassin de Marennes-Oléron. L'objectif principal est la protection de la santé publique. Cette surveillance se fait par la recherche de la flore indicatrice de contamination fécale* dans l'eau de mer et la matière vivante : Escherichia Coli (E . coli). L' If'remer veut mettre en place un outil de modélisation des flux de contamination aux embouchures des fleuves. Ce projet modélisera la cinétique de contamination et de décontamination dans l'eau de mer et dans les coquillages (huître et moule). Les concentrations bactériennes, dans chaque matrice * : l'eau de...
Tipo: Text
Ano: 2005
URL: http://archimer.ifremer.fr/doc/00427/53825/54816.pdf

Contribution à l'étude de la pathogénie induite par une vibriose de crevette
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Charlier, James.
Since 1993, significant mortality outbreaks of Shrimps Litopenaeus stylirostris have been reported from grown out pounds in New Caledonia. This pathology, known as Syndrome 93, is responsible for acute epizootic. A sea bacterium, Vibrio penaeicida, has been soon related to the infection. To prevent this shrimp disease, diagnostic methods and dynamic studies of this Vibrio have been planned. The experimental infection model by immersion has been used. The bacterial virulencehas been proved by dynamic of mortality. Just the fall of number of haemocytes in circulationhas been identified as a sign of pathology. The probe DNA corresponding to the specifie 16S RNA has been used to detect purified DNA of V.penaeicida. The capacity of the probe to identify the...
Tipo: Text
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00441/55274/56768.pdf

Long-term effects of moderate elevation of oxidation–reduction potential on European seabass (Dicentrarchus labrax) in recirculating aquaculture systems
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Li, Xian; Przybyla, Cyrille; Triplet, Sebastien; Liu, Ying; Blancheton, Jean-paul.
The long term effects of moderate elevation ORP (oxidation–reduction potential) around 300–320 mV on the growth, hematological parameters and the ability of European seabass (Dicentrarchus labrax) to react against bacterial infection was studied in recirculating aquaculture systems (RASs). Two RASs, one with a moderate ozonation (RAS-O3) and a control (RAS-C) were used in this experiment. After 60 days, seabass reared in the RAS-O3 were more able to react against a Vibrio anguillarum infection. It was in spite of the fact that seabass in the RAS-O3 showed decreased feed intake, feed conversion rate, growth rate and modified hematological parameters compared with the fish in RAS-C. It is obvious that an ORP level of 300–320 mV is too high for seabass to...
Tipo: Text
Palavras-chave: Oxidation–reduction potential; Seawater; European seabass; Welfare; RASs.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00244/35562/34132.pdf

Variations of the Antarctic Circumpolar Current intensity during the past 500 ka
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mazaud, A.; Michel, Elisabeth; Dewilde, F.; Turon, J. L.
We examine the past variations of the Antarctic Circumpolar Current (ACC) by using variations in size and abundance of the magnetic grains deposited by this current at a site east the Kerguelen-Crozet plateau. Core MD00-2375G was taken at a midlatitude site during the ANTAUS cruise conducted in 2000 by the French R/V Marion Dufresne. Marine isotope stages (MIS) down to MIS 13 are identified, and an age model is derived from a correlation to the ice core isotopic record obtained from EPICA in Antarctica. Continuous records of abundance and size of the magnetic grains were obtained using environmental magnetism methods. Results show a strong modulation of the ACC flow intensity in response to glacial and interglacial cycles. The low abundance and the small...
Tipo: Text
Palavras-chave: Antarctic; Current; Past; Cycles.
Ano: 2010
URL: https://archimer.ifremer.fr/doc/00231/34190/32874.pdf

Metrics for the Evaluation of the Southern Ocean in Coupled Climate Models and Earth System Models
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Russell, Joellen L.; Kamenkovich, Igor; Bitz, Cecilia; Ferrari, Raffaele; Gille, Sarah T.; Goodman, Paul J.; Hallberg, Robert; Johnson, Kenneth; Khazmutdinova, Karina; Marinov, Irina; Mazloff, Matthew; Riser, Stephen; Sarmiento, Jorge L.; Speer, Kevin; Talley, Lynne D.; Wanninkhof, Rik.
The Southern Ocean is central to the global climate and the global carbon cycle, and to the climate's response to increasing levels of atmospheric greenhouse gases, as it ventilates a large fraction of the global ocean volume. Global coupled climate models and earth system models, however, vary widely in their simulations of the Southern Ocean and its role in, and response to, the ongoing anthropogenic trend. Due to the region's complex water-mass structure and dynamics, Southern Ocean carbon and heat uptake depend on a combination of winds, eddies, mixing, buoyancy fluxes, and topography. Observationally based metrics are critical for discerning processes and mechanisms, and for validating and comparing climate and earth system models. New observations...
Tipo: Text
Palavras-chave: Southern Ocean; Heat uptake; Carbon uptake; Observationally based metrics.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00673/78491/80788.pdf

Dual transcriptomics of virus-host interactions: comparing two Pacific oyster families presenting contrasted susceptibility to ostreid herpesvirus 1
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Segarra, Amelie; Mauduit, Florian; Faury, Nicole; Trancart, Suzanne; Degremont, Lionel; Tourbiez, Delphine; Haffner, Philippe; Barbosa-solomieu, Valerie; Pepin, Jean-francois; Travers, Marie-agnes; Renault, Tristan.
Background:  Massive mortality outbreaks affecting Pacific oyster (Crassostrea gigas) spat in various countries have been associated with the detection of a herpesvirus called ostreid herpesvirus type 1 (OsHV-1). However, few studies have been performed to understand and follow viral gene expression, as it has been done in vertebrate herpesviruses. In this work, experimental infection trials of C. gigas spat with OsHV-1 were conducted in order to test the susceptibility of several bi-parental oyster families to this virus and to analyze host-pathogen interactions using in vivo transcriptomic approaches.  Results:  The divergent response of these oyster families in terms of mortality confirmed that susceptibility to OsHV-1 infection has a significant...
Tipo: Text
Palavras-chave: Interactions; Ostreid herpesvirus 1; Gene expression; Susceptibility; Crassostrea gigas.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00199/31029/29431.pdf

Nouveaux échanges de matériels vivants en aquaculture
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lucas, Albert; Devauchelle, Nicole.
Les échanges de Matériels vivants apparaissent comme une caractéristique constante de toute aquaculture, y compris de la conchyliculture traditionnelle. Ils interviennent par exemple sous forme d'animaux adultes mis sur le marché pour être consommés vivants, ou sous forme de naissain ou d'alevins d'importation, ou encore lors des essais d'acclimatation d'une espèce étrangère en vue de sa culture. A cela s'ajoutent les transferts au cours du développement : c'est ce dernier aspect qui retiendra surtout notre attention. Dans la mesure où l'aquaculture nouvelle cherche à maîtriser tous les stades du développement de l'œuf à l'adulte, les échanges ou transferts d'animaux vivants deviennent obligatoires : en effet, on ne saurait réaliser au même endroit...
Tipo: Text
Ano: 1982
URL: http://archimer.ifremer.fr/doc/00049/16001/13446.pdf

Improving the definition of fishing effort for important European fleets by accounting for the skipper effect
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Marchal, Paul; Andersen, B; Bromley, D; Iriondo, A; Mahevas, Stephanie; Quirijns, F; Rackham, B; Santurtun, M; Tien, N; Ulrich, Clara.
The scope of this paper is to quantify, for a wide selection of European fisheries, fishing tactics and strategies and to evaluate the benefits of adjusting the definition of. fishing effort using these elements. Fishing tactics and strategies were identified by metiers choices and a series of indices. These indices have been derived to reflect shifts in tactics (within a fishing trip) and in strategies (within a year). The Shannon-Wiener spatial diversity indices of fishing tactics (FT_SW) and strategies (YE_SW) had the greatest impact on catch rates. In particular, FT_SW was always negatively correlated to catch rates. One may anticipate that during a fishing trip, vessels with high FT_SW have been searching fish aggregations for a long time, while...
Tipo: Text
Palavras-chave: Fishing effort; Fishing mortality; Catch rates; GLM modeling; Skipper effect.
Ano: 2006
URL: https://archimer.ifremer.fr/doc/2006/publication-1339.pdf

Chemosynthetic symbionts of marine invertebrate animals are capable of nitrogen fixation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Petersen, Jillian M.; Kemper, Anna; Gruber-vodicka, Harald; Cardini, Ulisse; Van Der Geest, Matthijs; Kleiner, Manuel; Bulgheresi, Silvia; Mussmann, Marc; Herbold, Craig; Seah, Brandon K. B.; Antony, Chakkiath Paul; Liu, Dan; Belitz, Alexandra; Weber, Miriam.
Chemosynthetic symbioses are partnerships between invertebrate animals and chemosynthetic bacteria. The latter are the primary producers, providing most of the organic carbon needed for the animal host's nutrition. We sequenced genomes of the chemosynthetic symbionts from the lucinid bivalve Loripes lucinalis and the stilbonematid nematode Laxus oneistus. The symbionts of both host species encoded nitrogen fixation genes. This is remarkable as no marine chemosynthetic symbiont was previously known to be capable of nitrogen fixation. We detected nitrogenase expression by the symbionts of lucinid clams at the transcriptomic and proteomic level. Mean stable nitrogen isotope values of Loripes lucinalis were within the range expected for fixed atmospheric...
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00380/49100/74895.pdf

Unfamiliar congener used as a visual attractor in wild caught and domesticated sea bass (Dicentrarchus labrax) placed in a T-maze
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Benhaim, David; Begout, Marie-laure; Chatain, Beatrice.
The present work compared wild-caught and domesticated sea bass juveniles swimming activity, exploration and visual attraction induced by an unfamiliar congener located behind a transparent wall at the end of one arm of a T-maze. This cognitive challenge was based on the hypothesis that placed into a novel and therefore stressful environment; the fish would adopt a gregarious behaviour even though they were not familiar with the present congener. Twenty individuals of similar size from both origins were individually tested. After a 5min acclimatization period, the wall of the start-box was removed and the maze was filmed during 20 min. Different swimming variables including angular velocity (Vang), total distance travelled (Dtot), velocity mean (Vel), time...
Tipo: Text
Palavras-chave: Domestication; Maze; Visual cue; Personality; Swimming activity.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00192/30322/28793.pdf

Sur les stades jeunes de quelques poissons de chalut de la côte de Mauritanie. (1re note)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cadenat, Jean.
Les oeufs et les stades larvaires pélagiques de la plupart des espèces de poissons comestibles sont à l'heure actuelle parfaitement connus grâce aux travaux toujours plus complets des naturalistes de tous les pays du monde. Il n'en est pas de même de la période critique de leur vie, où abandonnant leur existence pélagique, les jeunes poissons se rapprochent du fond qui va être désormais leur principal habitat. Ce changement de milieu, ce passage plus ou moins brusque d'une vie pendant laquelle leurs déplacements les plus importants sont déterminés par les phénomènes physiques de l'Océan, à une existence à peu près indépendante sur le fond, ne s'opère pas sans entraîner la plupart du temps chez les jeunes poissons d'importantes modifications. [OCR NON...
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1936
URL: http://archimer.ifremer.fr/doc/1936/publication-5741.pdf

Etude de la stabilité de l'enrochement de protection du cable IFA 2000 MW
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Youenou, Gilles; Monbet, Yves.
Dand le cadre de la réalisation de l'interconneion électrique entre la France et l'Angleterre de 2000MW, désignée par I.F.A. 2000MW, un ouvrage de protection par enrochement d'une réparation de câble sous-marin a été réalisé pour le compte d'E.D.F. (figure 1). Cette intervention effetuée au printemps 1985, se situe sur la route 4 au large de Sangatte (figure 2). Les cailloux constituant la carapace de l'enrochement proviennent de la carrière du boulonnais et de celle de la Vallée Heureuse où ils ont été obtenus par concassage et triage au calibre de 90/200 mm. En 1986, les marin pêcheurs de Calais ont signalé qu'ils ramenaient dan leurs filets (trémails) des cailloux épars provenant des enrochements. D'après les pêcheurs il s'agirait de 300 tonnes de...
Tipo: Text
Ano: 1987
URL: http://archimer.ifremer.fr/doc/00106/21692/19271.pdf

Recherches sur l'algue brune Sargassum muticum (Yendo) Fensholt en Basse-Normandie
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Givernaud, Thierry.
INTRODUCTION - La Sargasse est une algue brune originaire des côtes du Japon (Pacifique et Mer du Japon). Elle a été introduite accidentellement en 1940 sur les côtes nord-américaines du Pacifique qu'elle colonise actuellement sur plus de 3 000 kilomètres, de la Colombie britannique au Nouveau Mexique. En 1973, elle est apparue en Grande-Bretagne où elle envahit les côtes sud. En 1975, elle est signalée pour la première fois en France au niveau de Grandcamp et de Saint-Vaast (COSSON et al., 1977, GRUET, 1976) ; elle a depuis cette date envahi les côtes européennes, de la Hollande à la Gironde (CRITCHLEY, 1983). En 1980, elle fait son apparition en Méditerranée, dans l'étang de Thau (BELSHER &amp; BOYEN, 1983). Dans toutes ces nouvelles zones de...
Tipo: Text
Ano: 1984
URL: http://archimer.ifremer.fr/doc/00077/18836/16411.pdf

Eléments d’information sur l’exploitation du stock de crevettes peneides de Guyane 2021
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tagliarolo, Morgana.
Tipo: Text
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00681/79339/81851.pdf

Analyse de l'ammonium et interférences liées à la présence de sulfures
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hubert, Morgane.
Dans le cadre de l’adaptation du protocole d’analyse de l’ammonium par fluorimétrie manuelle, aux besoins du laboratoire (environnements réduits notamment), plusieurs points d’améliorations ont été étudiés. Notamment, pour contourner les interférences provoquées par la présence de sulfures.
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00641/75340/76026.pdf

Turbulence Modeling and Wave-Current Interactions
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bennis, Anne-claire; Dumas, Franck; Ardhuin, Fabrice; Blanke, Bruno.
The mechanics of rip currents are complex, involving interactions between waves, currents, water levels and the bathymetry, that present particular challenges for numerical models. Here, the effects of a grid-spacing dependent horizontal mixing on the wave-current interactions are studied. Near the shore, wave rays diverge from channels towards bar crests because of refraction by topography and currents, in a way that depends on the rip current intensity which is itself modulated by the horizontal mixing. At low resolution with the grid-spacing dependent horizontal mixing, the wave motion is the same for both coupling modes because the wave deviation by the currents is weak. In high resolution case, however, classical results are found with the stabilizing...
Tipo: Text
Palavras-chave: Numerical modeling; Rip currents; Turbulence modeling; Wave-current interactions.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00601/71288/69695.pdf

Reconstructing individual shape histories of fish otoliths: A new image-based tool for otolith growth analysis and modeling
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fablet, Ronan; Chessel, Anatole; Carbini, Sebastien; Benzinou, Abdesslam; De Pontual, Helene.
In this paper is presented a novel image processing tool for the extraction of geometric information in otolith images. It relies on the reconstruction of individual otolith shape histories from otolith images. Based on the proposed non-parametric level-set representation of otolith shape history, applications to the extraction of growth axes and ring structures in otolith images are first considered. A second category of applications concern the analysis of 2D otolith growth. The potential of the proposed framework is illustrated on real otolith images for various species (e.g., cod, pollock) and discussed with a particular emphasis on the genericity of the approach and on applications such as otolith shape analysis, multi-proxy otolith analysis, otolith...
Tipo: Text
Palavras-chave: 2D otolith growth; Growth axis extraction; Growth ring extraction; Shape dynamics; Otolith imaging.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6319.pdf

Essais d'utilisation des cryoprotecteurs : application au hachis de poisson
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Necibi, Mohamed Mongi.
This study was carried out in order to find a better use for by - products or products which are at this time under used - filleting residues - by catch fish - non commercialized species. The technology permetting the recuperation of the edible flesh from these products is available and is in fact already in use industriallyo A preliminary investigation had been done at the ISTPM on this subject. Fish mince is the product obtained with the deboning machine, which separates the flesh from skin and bones by forcing it through a perforated metallic drum. This mince can be put in good use, particularly in production of fish "charcuterie", fish soup or aroma. Research in this field is active in several contries, notably in Japan where enormous arnount of mince...
Tipo: Text
Ano: 1982
URL: http://archimer.ifremer.fr/doc/00135/24662/22705.pdf

Estimates of total mortality of eastern Atlantic bluefin tuna based on year-class curves
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fromentin, Jean-marc; Arrizabalaga, Haritz; Restrepo, Victor R; Ortiz De Urbina, J.
The 2004 data exploratory meeting concluded that it was no longer defensible to assess the East Atlantic and Mediterranean population using methods that assume that the catch-atsize/age is known exactly, until extensive improvements in fisheries statistics are made. For these reasons, we here investigated the potential benefits of the year-class curve analysis. The robustness and consistency of our results tend to advocate that this method is, in the present situation, a good alternative to ADAPT (among others). As a whole, the estimates of Z from the year-class curve analyses applied on the Spanish trap and Japanese long line fishery data appear indeed to be in good or excellent agreement with ADAPT outputs for the same period and same age-classes. This...
Tipo: Text
Palavras-chave: Fishing and natural mortalities; Year-class curves; Stock assessment.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00192/30325/28799.pdf

Investigation of bacterial communities within the digestive organs of the hydrothermal vent shrimp Rimicaris exoculata provide insights into holobiont geographic clustering
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cowart, Dominique; Durand, Lucile; Cambon-bonavita, Marie-anne; Arnaud-haond, Sophie.
Prokaryotic communities forming symbiotic relationships with the vent shrimp, Rimicaris exoculata, are well studied components of hydrothermal ecosystems at the Mid-Atlantic Ridge (MAR). Despite the tight link between host and symbiont, the observed lack of spatial genetic structure seen in R. exoculata contrasts with the geographic differentiation detected in specific bacterial ectosymbionts. The geographic clustering of bacterial lineages within a seemingly panmictic host suggests either the presence of finer scale restriction to gene flow not yet detected in the host, horizontal transmission (environmental selection) of its endosymbionts as a consequence of unique vent geochemistry, or vertically transmitted endosymbionts that exhibit genetic...
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00376/48705/49058.pdf

Colonization of coastal environments by foraminifera: insight from shrimp ponds in New Caledonia (sw Pacific)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Debenay, J. -p.; Della Patrona, Luc; Goguenheim, H.
The objectives of this study were to observe foraminiferal colonization patterns and behavior in shrimp ponds in New Caledonia during a shrimp-growing (farming) cycle. Weekly collecting at 10 stations in 8 shrimp ponds yielded a total of 170 samples accompanied by environmental data. Seawater pumped from the nearby ocean filled the ponds at the beginning of the growth cycle and its daily renewal maintained salinity at 32-39, and supplied the ponds with influxes of smaller, mostly juvenile, foraminifera. A few days after initial filling, the pioneering species Ammonia tepida and Quinqueloculina seminula appeared, with A. tepida dominant. Their high reproduction rates increased both living and dead assemblage densities during the first 10 weeks. Populations...
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6954.pdf

Evaluation of global monitoring and forecasting systems at Mercator Ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lellouche, J. -m.; Le Galloudec, O.; Drevillon, M.; Regnier, C.; Greiner, E.; Garric, G.; Ferry, N.; Desportes, C.; Testut, C. -e.; Bricaud, C.; Bourdalle-badie, R.; Tranchant, B.; Benkiran, M.; Drillet, Y.; Daudin, A.; De Nicola, C.
Since December 2010, the MyOcean global analysis and forecasting system has consisted of the Mercator Ocean NEMO global 1/4 degrees configuration with a 1/12 degrees nested model over the Atlantic and the Mediterranean. The open boundary data for the nested configuration come from the global 1/4 degrees configuration at 20 degrees S and 80 degrees N. The data are assimilated by means of a reduced-order Kalman filter with a 3-D multivariate modal decomposition of the forecast error. It includes an adaptive-error estimate and a localization algorithm. A 3-D-Var scheme provides a correction for the slowly evolving large-scale biases in temperature and salinity. Altimeter data, satellite sea surface temperature and in situ temperature and salinity vertical...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00141/25229/27513.pdf

Long-term, high frequency in situ measurements of intertidal mussel bed temperatures using biomimetic sensors
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Helmuth, Brian; Choi, Francis; Matzelle, Allison; Torossian, Jessica L.; Morello, Scott L.; Mislan, K. A. S.; Yamane, Lauren; Strickland, Denise; Szathmary, P. Lauren; Gilman, Sarah E.; Tockstein, Alyson; Hilbish, Thomas J.; Burrows, Michael T.; Power, Anne Marie; Gosling, Elizabeth; Mieszkowska, Nova; Harley, Christopher D. G.; Nishizaki, Michael; Carrington, Emily; Menge, Bruce; Petes, Laura; Foley, Melissa M.; Johnson, Angela; Poole, Megan; Noble, Mae M.; Richmond, Erin L.; Robart, Matt; Robinson, Jonathan; Sapp, Jerod; Sones, Jackie; Broitman, Bernardo R.; Denny, Mark W.; Mach, Katharine J.; Miller, Luke P.; O'Donnell, Michael; Ross, Philip; Hofmann, Gretchen E.; Zippay, Mackenzie; Blanchette, Carol; Macfarlan, J. A.; Carpizo-ituarte, Eugenio; Ruttenberg, Benjamin; Pena Mejia, Carlos E.; Mcquaid, Christopher D.; Lathlean, Justin; Monaco, Cristian; Nicastro, Katy R.; Zardi, Gerardo.
At a proximal level, the physiological impacts of global climate change on ectothermic organisms are manifest as changes in body temperatures. Especially for plants and animals exposed to direct solar radiation, body temperatures can be substantially different from air temperatures. We deployed biomimetic sensors that approximate the thermal characteristics of intertidal mussels at 71 sites worldwide, from 1998-present. Loggers recorded temperatures at 10-30 min intervals nearly continuously at multiple intertidal elevations. Comparisons against direct measurements of mussel tissue temperature indicated errors of similar to 2.0-2.5 degrees C, during daily fluctuations that often exceeded 15 degrees-20 degrees C. Geographic patterns in thermal stress based...
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00605/71693/70134.pdf

Detection of coherent oceanic structures via transfer operators
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Froyland, G; Padberg, K; England, M; Treguier, Anne-marie.
Coherent nondispersive structures are known to play a crucial role in explaining transport in nonautonomous dynamical systems such as ocean flows. These structures are difficult to extract from model output as they are Lagrangian by nature and not revealed by the underlying Eulerian velocity fields. In the last few years heuristic concepts such as finite-time Lyapunov exponents have been used in an attempt to detect barriers to oceanic transport and thus identify regions that trap material such as nutrients and phytoplankton. In this Letter we pursue a novel, more direct approach to uncover coherent regions in the surface ocean using high-resolution model velocity data. Our method is based upon numerically constructing a transfer operator that controls the...
Tipo: Text
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-4349.pdf

Best practice report – Operation and Maintenance requirements. Deliverable 3.6.3 from the MERiFIC Project
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Maisondieu, Christophe; Johanning, Lars; Weller, Samuel.
This report is a deliverable of MERiFIC Work Package 3.6: ‘Operation and Maintenance requirements’ and has been produced as a cross border collaboration between IFREMER and the University of Exeter. The report provides an overview of guidelines and recommendations for the management of O&amp;M operations necessary for an optimal exploitation of Marine energy plants, with a focus on the specific areas of South West Cornwall, UK and Iroise sea, Brittany, France. An overview of the onshore infrastructures and ports possibly suitable for management of such O&amp;M operations is also provided. Management of scheduled and unscheduled maintenance operations are discussed in their various aspects including site accessibility. It should be noted that this topic,...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00203/31443/29841.pdf

Palangres et lignes à grands pélagiques. Guadeloupe. 2017. Observation des Marées au débarquement - OBSDEB.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: IFREMER. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public. Ces indicateurs intègrent...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00492/60366/63799.pdf

Compte-rendu de mission en Tunisie (13-17 Juin 2005). Atelier de travail sur les nouvelles perspectives de la recherche scientifique en aquaculture
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thouard, Emmanuel; Buchet, Vincent; Cahu, Chantal; Coeurdacier, Jean-luc; Elie, Pierre; Gerard, André; Hussenot, Jerome; Legendre, Marc; Prou, Jean; Robert, Rene.
Les missions réalisées fin 2004 et début 2005 ont permis de faire le point sur les coopérations potentielles entre l'INSTM et l'IFREMER. Un certain nombre de domaines de coopération et de sujets de collaboration ont été identifiés et se sont traduits (ou se traduiront) par des actions de coopération (missions, stages, formations) soutenues financièrement par le SCAC de l'Ambassade de France à Tunis. La coopération entre l'IFREMER et l'INSTM dans le domaine de l'aquaculture a été très active dans le cadre du programme« Aquaculture 2001 » (1997-2001). Depuis cette période les relations se sont limitées à la préparation du programme DORAD qui était la suite d' «Aquaculture 2001 » . En l'absence du financement FSP sollicité pour DORAD, les deux organismes ont...
Tipo: Text
Ano: 2005
URL: http://archimer.ifremer.fr/doc/00305/41648/40857.pdf

Report of the Working Group on Elasmobranch Fishes (WGEF). 17–23 June 2015 Lisbon, Portugal
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ICES.
ICES WGEF meets annually, with advice for a subset of stocks drafted in alternating years. No special requests were received this year. Work in 2015 focused on those stocks for which it was an advisory year: Skates in the North Sea ecoregion, skates in the Azorean and Mid Atlantic Ridge ecoregion, Portuguese dogfish, leafscale gulper shark, kitefin shark, catsharks (Scyliorhinus canicula and Galeus melastomus), smooth-hounds (Mustelus spp.), tope, porbeagle, basking shark and angel shark.
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00287/39842/38374.pdf

Modelling benthic invasion by the colonial gastropod Crepidula fornicata and its competition with the bivalve Pecten maximus . 2. Coupling the 0D model of colony-forming species to a connectivity matrix for a realistic distributed simulation of benthic invasion
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Menesguen, Alain; Hachet, Alois; Gregoris, Thomas.
The anthropogenic introduction in U.K. waters of the north-American marine gastropod Crepidula fornicata (Linné, 1758), commonly called slipper limpet, and its consecutive spreading has led in less than a century to the invasion of a part of benthic grounds along the North-European coasts. Competition for space has hampered the maintenance of the native scallop Pecten maximus, whereas dredge clogging has drastically limited scallop fishing, especially in the Western English Channel. In order to assess the possible future distribution and abundance of both species (Crepidula and Pecten), an original model of slipper limpet chains joined to a simple year-class model of the scallop (Ménesguen and Grégoris, 2017) has been coupled to a connectivity matrix...
Tipo: Text
Palavras-chave: Slipper limpet; Invasive species; Colony model; Connectivity matrix eigenvectors; Scallop; Competition for space.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00431/54231/57333.pdf

Activité des navires de pêche 2017 : quartier maritime Camaret
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: SIH. Système d'Informations Halieutiques de l'Ifremer.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public.
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00490/60128/63472.pdf

Growth and distribution of the great scallop (Pecten maximus) in the English Channel: a modelling approach.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Goff, Clement; Lavaud, Romain; Cugier, Philippe; Jean, Frédéric; Flye Sainte Marie, Jonathan.
The great scallop Pecten maximus is currently the most important species in landings (as well in tons as in value) for the French inshore fleet of the English Channel. A French scientific program “COMANCHE” funded by the French National Research Agency (ANR) was conducted to improve our knowledge on the great scallop within its ecosystem, in an integrated way and over the whole area of the English Channel. In that context, the aim of this study is to better understand the determinism of the growth and distribution of the great scallop in the English Channel, integrating both physical and trophic constraints through a modelling approach. The used method is based on the coupling of a 3D hydrodynamical model (MARS3D developed at Ifremer) providing...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00139/24987/23087.pdf

Recherche et caractérisation d'immunoglobulines dans les oeufs du loup (Dicentrarchus labrax)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pepin, Jean-francois; Breuil, Gilles; Rigobert, P; Romestand, Bernard.
The occurrence of maternal immunity transfer in Sea bass (Dicentrarchus labrax) was investigated using ELISA and Western blot technics. In order to determine the possible presence of immunoglobulin (Ig), egg proteins obtained from fertilized eggs were analyzed. After several extraction protocol assays (precipitation, chromatography), monoclonal and polyclonal antibody probes specific to Sea bass Ig allowed to confirm the presence of an immunoglobulin-like protein in eggs with very low level. Biochemical characterization was carried out using SDS-PAGE. Results indicated that egg Ig had a molecular weight of 206 kDa. They were smaller than seric IgM (800 kDa). The heavy (H) and light (L) chains of the egg Ig and of the seric IgM had similar molecular weight,...
Tipo: Text
Palavras-chave: Immunoglobuline; Transfert immunité maternelle; ELISA; Œuf; Poisson; Immunoglobulin; Maternal immunity transfer; ELISA; Eggs; Fish.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00272/38275/36458.pdf

Availability and usefulness of economic data on the effects of aquaculture: a North Atlantic comparative assessment
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mikkelsen, Eirik; Fanning, Lucia; Kreiss, Cornelia; Billing, Suzannah‐lynn; Dennis, John; Filgueira, Ramon; Grant, Jon; Krause, Gesche; Lipton, Doug; Miller, Molly; Perez, Jose; Stead, Selina; Villasante, Sebastian.
This paper focuses on the availability of economic indicators and metrics to assess effects of marine aquaculture production in the North Atlantic area (the EU, Norway, Canada and USA), including also social and environmental effects. We consider how aquaculture planning and management is organised in the different countries and the usefulness of economic information to address different aquaculture‐related policies. We find that the most relevant economic data for aquaculture management should be at the local and regional levels rather than nationally. The availability of such economic data is mapped for national, regional and local level. The focus is on data that are publicly available from authorities or research institutions. The availability of data...
Tipo: Text
Palavras-chave: Aquaculture; Economic data; Management; Planning; Policy relevance.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00646/75811/76753.pdf

Underwater video techniques for observing coastal marine biodiversity: A review of sixty years of publications (1952–2012)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mallet, Delphine; Pelletier, Dominique.
Underwater video techniques are increasingly used in marine ecology studies. Technological progress regarding video cameras, sensors (such as sounders), battery life and information storage make these techniques now accessible to a majority of users. However, diver-based underwater visual censuses, and catch and effort data, remain the most commonly used for observing coastal biodiversity and species. In this paper, we review the underwater video techniques that have been developed since the 1950s to investigate and/or monitor coastal biodiversity. Techniques such as remote underwater video, whether baited or not, diver-operated video and towed video are described, along with corresponding applications in the field. We then analyse the complementary of...
Tipo: Text
Palavras-chave: Underwater video; Monitoring; Coastal biodiversity; Fish; Habitat.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00181/29274/27901.pdf

Extending the known distribution of Nicosia’s chameleon, Furcifer nicosiai Jesu, Mattioli &amp; Schimmenti, 1999 (Squamata: Chamaeleonidae)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Belluardo, Francesco; Rosa, Gonçalo; Andreone, Franco; Courtois, Elodie; Lobón-rovira, Javier; Nussbaum, Ronald A; Raselimanana, Miary; Rasoazanany, Malalatiana; Raxworthy, Christopher; Crottini, Angelica.
Tipo: Text
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00682/79401/81943.pdf

Projet de pasteurisateur pilote. Principe de fonctionnement
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Knockaert, Camille.
L'appareil a pour but de pasteuriser des sachets de poissons emballés sous vide et d'un poids unitaire de 150 à 200 g. L'objectif est de mettre à la disposition des restaurateurs un outil simple d'emploi et de nettoyage aisé (répondant aux normes d'hygiène). Le principal intérêt réside dans le fait que les opérations de traitement thermique et refroidissement sont réalisables dans le même appareil.
Tipo: Text
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00134/24529/22557.pdf

Living (stained) benthic foraminifera from the Mozambique Channel (eastern Africa): Exploring ecology of deep-sea unicellular meiofauna
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fontanier, Christophe; Garnier, Eline; Brandily, Christophe; Dennielou, Bernard; Bichon, S.; Gayet, Nicolas; Eugene, Thibaut; Rovere, Mickael; Gremare, A.; Deflandre, B.
Live (Rose-Bengal stained) deep-sea foraminiferal faunas have been studied at four stations between 530–3200-m depth in the Mozambique Channel (eastern Africa) to understand how complex environmental conditions (e.g., organic matter, oxygenation) control their ecological structure (i.e., diversity, density, and microhabitats). Two upper-slope stations, located at 530- and 780-m depth off Madagascar, are bathed by well-oxygenated bottom waters. They are characterized by fine sediments enriched in highly degraded organic matter (low amino-acid bio-availability and reduced chlorophyllic freshness). Mineralization of organic compounds results in relatively moderate oxygen penetration depth (i.e., 15 and 30 mm) in sediment. Interestingly, foraminiferal species...
Tipo: Text
Palavras-chave: Mozambique Channel; Foraminifera; Diversity; Microhabitat; Organic matter.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00344/45505/45057.pdf

Résultats de la Surveillance de la Qualité du Milieu Marin Littoral. Départements : Charente-Maritime et Vendée (sud) . Edition 2000
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: IFREMER, laboratoires côtiers de La Rochelle &amp; La Tremblade.
Tipo: Text
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00317/42798/42182.pdf

A single bio-energetics growth and reproduction model for the oyster Crassostrea gigas in six Atlantic ecosystems
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Alunno-bruscia, Marianne; Bourles, Yves; Maurer, Daniele; Robert, Stephane; Mazurie, Joseph; Gangnery, Aline; Goulletquer, Philippe; Pouvreau, Stephane.
Many studies based on bioenergetics growth models have investigated the effects of environmental factors on oyster (Crassostrea gigas) growth and physiology. However, most of these models are site-specific and cannot be applied to other culture sites without the re-estimation of parameters or re-formulation of some processes. We aimed to develop a generic growth model suitable for application in contrasting environments, with a constant set of parameters. We tested the oyster-DEB model (Bourlès et al. 2009) for the stimulation of C. gigas growth in different cohorts (spats and adults) at major shellfish culture sites in France, in several years: Arcachon (1993–1994); Marennes-Oléron (2007); Quiberon (1999, 2000, 2001); Rade de Brest (2008); Baie du...
Tipo: Text
Palavras-chave: DEB theory; Modelling; Bivalves; Crassostrea gigas; Phytoplankton; Temperature effect; Coastal environment.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00043/15403/12762.pdf

From the cradle to the grave: Green turtle hatchlings (Chelonia mydas) preyed upon by two-spots red snappers (Lutjanus bohar)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Juhel, Jean-baptiste; Maire, Eva; Sucré, Elliott; Cheutin, Marie-charlotte; Marques, Virginie; Benkwitt, Cassandra; Gunn, Rachel L.; Richards, Eilísh; Albouy, Camille.
The observation of trophic interactions such as predation provide valuable information to model food webs and better understand ecosystem functioning. Such information is crucial for rare and endangered species in order to adapt management measures and ensure their conservation. However, trophic interactions are rarely observed in the marine realm, even for well-known or widespread species. During a scientific cruise in the Scattered Islands (Southwestern Indian Ocean), we observed endangered green turtle hatchlings (Chelonia mydas) in the gut content of two subadults two-spots red snappers (Lutjanus bohar). This trophic link involving emblematic species has not been previously described. The two-spots red snapper is a widespread coral reef fish in the...
Tipo: Text
Palavras-chave: Trophic interaction; Marine turtle; Red bass; Snapper; Lutjanids.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00589/70160/68162.pdf

The new insights into the oyster antimicrobial defense: Cellular, molecular and genetic view
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bachere, Evelyne; Rosa, Rafael Diego; Schmitt, Paulina; Poirier, Aurore; Merou, Nicolas; Charriere, Guillaume; Destoumieux-garzon, Delphine.
Oysters are sessile filter feeders that live in close association with abundant and diverse communities of microorganisms that form the oyster microbiota. In such an association, cellular and molecular mechanisms have evolved to maintain oyster homeostasis upon stressful conditions including infection and changing environments. We give here cellular and molecular insights into the Crassostrea gigas antimicrobial defense system with focus on antimicrobial peptides and proteins (AMPs). This review highlights the central role of the hemocytes in the modulation and control of oyster antimicrobial response. As vehicles for AMPs and other antimicrobial effectors, including reactive oxygen species (ROS), and together with epithelia, hemocytes provide the oyster...
Tipo: Text
Palavras-chave: Mollusk; Immunity; Antimicrobial peptide; Hemocyte; Defensin.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00254/36552/35097.pdf

A kinetic energy budget and internal instabilities in the Fine Resolution Antarctic Model
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ivchenko, Vladimir O; Treguier, Anne-marie; Best, Se.
An energy analysis of the Fine Resolution Antarctic Model (FRAM) reveals the instability processes in the model. The main source of time-mean kinetic energy is the wind stress and the main sink is transfer to mean potential energy. The wind forcing thus helps maintain the density structure. Transient motions result from internal instabilities of the Bow rather than seasonal variations of the forcing. Baroclinic instability is found to be an important mechanism in FRAM. The highest values of available potential energy are found in the western boundary regions as well as in the Antarctic Circumpolar Current (ACC) region. All subregions with predominantly zonal flow are found to be baroclinically unstable. The observed deficit of eddy kinetic energy in FRAM...
Tipo: Text
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00337/44779/44598.pdf

Variabilité spatio-temporelle de la composition des fluides hydrothermaux (observatoire fond de mer EMSO-Açores, Lucky Strike) : traçage de la circulation hydrothermale et quantification des flux chimiques associés
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Leleu, Thomas.
This thesis present a detailed study of the composition of high temperature fluid from the Lucky Strike hydrothermal field (37°N, Mid Ocean Ridge) collected during three sampling campaigns within the framework of the deep sea observatory EMSO-Azores. The hydrothermal field has developped around a fossil lava lake framed by three ancient volcanic cones. In 2013, the discovery of a new active site to the East of the system, and presenting an unprecedented fluid composition at Lucky Strike (low Cl concentration and high Fe and Mn concentration), lead to a new model of hydrothermal circulation based on chemical geothermobarometer (Si; Si-Cl) and geothermometer (Fe-Mn) applied to 13 venting sites. We defined 5 groups of sites based on their chlorinity and...
Tipo: Text
Palavras-chave: Fumeur noir; Variabilité spatio-temporelle; Circulation hydrothermale; Isotope; Séparation de phase; Isotope; Hydrothermal circulation; Phase separation; Black Smoker; Time-serie.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00692/80380/83501.pdf

Direct assessment of anchovy by the Pelgas06 acoustic survey
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Masse, Jacques; Mehault, Sonia; Beillois, Pierre; Duhamel, Erwan; Planque, Benjamin; Petitgas, Pierre; Biseau, Alain.
An acoustic survey was carried out in the bay of Biscay from May 1st to May 30th  on board the French research vessel Thalassa. The objective of PELGAS06 survey was to study the abundance and distribution of pelagic fish in the Bay of Biscay. The target species were mainly anchovy and sardine and were considered in a multi-specific context. The results have to be used during ICES working groups in charge of the assessment of sardine, anchovy, mackerel and horse mackerel and in the frame of the Ifremer fisheries ecology program "resources variability"
Tipo: Text
Palavras-chave: Bay of Biscay; Plakton net; Trawl; CUFES; Survey; Acoustic; ICES; PELGAS; Anchovy; Golfe de Gascogne; Filet à plancton; Chalut; CUFES; Campagne; Acoustique; CIEM; PELGAS; Anchois.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/acte-2291.pdf

Sea surface temperature in the Indian sector of the Southern Ocean over the Late Glacial and Holocene
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Orme, Lise C; Crosta, Xavier; Miettinen, Arto; Divine, Dmitry V; Husum, Katrine; Isaksson, Elisabeth; Wacker, Lukas; Mohan, Rahul; Ther, Olivier; Ikehara, Minoru.
Centennial and millennial scale variability of Southern Ocean temperature is poorly known, due to both short instrumental records and sparsely distributed high-resolution temperature reconstructions, with evidence for past temperature variability instead coming mainly from ice core records. Here we present a high-resolution (~ 60 year), diatom-based sea-surface temperature (SST) reconstruction from the western Indian sector of the Southern Ocean that spans the interval 14.2 to 1.0 ka BP (calibrated kiloyears before present). During the late deglaciation, the new SST record shows cool temperatures at 14.2–12.9 ka BP and gradual warming between 12.9–11.6 ka BP in phase with atmospheric temperature evolution. This supports that the temperature of the Southern...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00631/74327/73963.pdf

Environmental factors affecting maerl bed structure in Brittany (France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dutertre, Mickael; Grall, Jacques; Ehrhold, Axel; Hamon, Dominique.
This study used a large spatial scale approach in order to better quantify the relationships between maerl bed structure and a selection of potentially forcing physical factors. Data on maerl bed structure and morpho-sedimentary characteristics were obtained from recent oceanographic surveys using underwater video recording and grab sampling. Considering the difficulties in carrying out real-time monitoring of highly variable hydrodynamic and physicochemical factors, these were generated by three-dimensional numerical models with high spatial and temporal resolution. The BIOENV procedure indicated that variation in the percentage cover of thalli can best be explained (correlation = 0.76) by a combination of annual mean salinity, annual mean nitrate...
Tipo: Text
Palavras-chave: Benthic habitats; Brittany; Environmental factors; Estuary; Large spatial scale; Maerl.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00280/39089/37816.pdf

Evolution des populations planctoniques animales en Manche et au sud de la Mer du Nord
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Fevre-lehoeerff, G; Grossel, H; Derrien, A.
Observations have been made on time variation in the physical, chemical and biological characteristics of the pelagic ecosystem. Simultaneous studies in different places also shows evidence for space variations. Differences between years in zooplankton species abundance are linked to principal climatic events (flow of large rivers, extreme temperatures). A better understanding of differences in zooplankton between nearby places has been obtained by taking into account the coastal configuration currents systems and water stability.
Tipo: Text
Ano: 1983
URL: http://archimer.ifremer.fr/doc/00246/35772/34285.pdf

Spatial heterogeneity of macrofaunal communities in and near a giant pockmark area in the deep Gulf of Guinea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Menot, Lenaick; Galeron, Joelle; Olu, Karine; Caprais, Jean-claude; Crassous, Philippe; Khripounoff, Alexis; Sibuet, Myriam.
The structure and familial-level composition of macrofaunal communities were examined within and at distance from the giant pockmark Regab in the Southern Gulf of Guinea, at 3200 m depth. The two main questions addressed in this study were (i) does habitat partitioning by large symbiont-bearing taxa. influence macrofaunal assemblages and their environment? and (ii) to what extent does the chemosynthesis-based ecosystem influence the structure and the composition of nearby macrobenthic communities? Along two radials, at sites from 250 to 1000 m away from the active centre of the cold seep, the abundance and composition of the macrofauna were typical of a deep-sea community at that depth. Except for a few cores sampled in or near dead vesicomyid fields at...
Tipo: Text
Palavras-chave: Cold seep; Diversity; Gulf of Guinea; Habitat heterogeneity; Macrofauna; Open slope; Siboglinid tubeworms; Vesicomyid clams.
Ano: 2010
URL: https://archimer.ifremer.fr/doc/00002/11282/8099.pdf

No net loss of biodiversity or paper offsets? A critical review of the French no net loss policy
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Quetier, Fabien; Regnery, Baptiste; Levrel, Harold.
French regulations concerning the mitigation of development impacts have been progressively strengthened with offsets now required for impacts on forests, wetlands, and protected species, among others. In 2012, following a national consultative process called Grenelle de l’Environnement, legal requirements in terms of monitoring and effective implementation of measures aimed at avoiding, reducing and offsetting impacts were strengthened. This has created strong “demand” for offsets.  The workability of these new requirements has come under scrutiny, not least because of their strong legal and financial implications for developers. In this context, official government guidance on implementing the mitigation hierarchy was published in 2012. Under this...
Tipo: Text
Palavras-chave: No net loss; Biodiversity offsets; Ecological compensation; EU Habitats Directive; European biodiversity strategy; Environmental impact assessment; Ecological equivalencies; France.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00168/27924/27267.pdf

Global spatial risk assessment of sharks under the footprint of fisheries
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Queiroz, Nuno; Humphries, Nicolas E.; Couto, Ana; Vedor, Marisa; Da Costa, Ivo; Sequeira, Ana M. M.; Mucientes, Gonzalo; Santos, Antonio M; Abascal, Francisco J.; Abercrombie, Debra L.; Abrantes, Katya; Acuna-marrero, David; Afonso, Andre S.; Afonso, Pedro; Anders, Darrell; Araujo, Gonzalo; Arauz, Randall; Bach, Pascal; Barnett, Adam; Bernal, Diego; Berumen, Michael L.; Lion, Sandra Bessudo; Bezerra, Natalia P. A.; Blaison, Antonin V.; Block, Barbara A.; Bond, Mark E.; Bonfil, Ramon; Bradford, Russell W.; Braun, Camrin D.; Brooks, Edward J.; Brooks, Annabelle; Brown, Judith; Bruce, Barry D.; Byrne, Michael E.; Campana, Steven E.; Carlisle, Aaron B.; Chapman, Demian D.; Chapple, Taylor K.; Chisholm, John; Clarke, Christopher R.; Clua, Eric G.; Cochran, Jesse E. M.; Crochelet, Estelle C.; Dagorn, Laurent; Daly, Ryan; Cortes, Daniel Devia; Doyle, Thomas K.; Drew, Michael; Duffy, Clinton A. J.; Erikson, Thor; Espinoza, Eduardo; Ferreira, Luciana C.; Ferretti, Francesco; Filmalter, John D.; Fischer, G. Chris; Fitzpatrick, Richard; Fontes, Jorge; Forget, Fabien; Fowler, Mark; Francis, Malcolm P.; Gallagher, Austin J.; Gennari, Enrico; Goldsworthy, Simon D.; Gollock, Matthew J.; Green, Jonathan R.; Gustafson, Johan A.; Guttridge, Tristan L.; Guzman, Hector M.; Hammerschlag, Neil; Harman, Luke; Hazin, Fabio H. V.; Heard, Matthew; Hearn, Alex R.; Holdsworth, John C.; Holmes, Bonnie J.; Howey, Lucy A.; Hoyos, Mauricio; Hueter, Robert E.; Hussey, Nigel E.; Huveneers, Charlie; Irion, Dylan T.; Jacoby, David M. P.; Jewell, Oliver J. D.; Johnson, Ryan; Jordan, Lance K. B.; Jorgensen, Salvador J.; Joyce, Warren; Daly, Clare A. Keating; Ketchum, James T.; Klimley, A. Peter; Kock, Alison A.; Koen, Pieter; Ladino, Felipe; Lana, Fernanda O.; Lea, James S. E.; Llewellyn, Fiona; Lyon, Warrick S.; Macdonnell, Anna; Macena, Bruno C. L.; Marshall, Heather; Mcallister, Jaime D.; Mcauley, Rory; Meyer, Michael A.; Morris, John J.; Nelson, Emily R.; Papastamatiou, Yannis P.; Patterson, Toby A.; Penaherrera-palma, Cesar; Pepperell, Julian G.; Pierce, Simon J.; Poisson, Francois; Quintero, Lina Maria; Richardson, Andrew J.; Rogers, Paul J.; Rohner, Christoph A.; Rowat, David R. L.; Samoilys, Melita; Semmens, Jayson M.; Sheaves, Marcus; Shillinger, George; Shivji, Mahmood; Singh, Sarika; Skomal, Gregory B.; Smale, Malcolm J.; Snyders, Laurenne B.; Soler, German; Soria, Marc; Stehfest, Kilian M.; Stevens, John D.; Thorrold, Simon R.; Tolotti, Mariana T.; Towner, Alison; Travassos, Paulo; Tyminski, John P.; Vandeperre, Frederic; Vaudo, Jeremy J.; Watanabe, Yuuki Y.; Weber, Sam B.; Wetherbee, Bradley M.; White, Timothy D.; Williams, Sean; Zarate, Patricia M.; Harcourt, Robert; Hays, Graeme C.; Meekan, Mark G.; Thums, Michele; Irigoien, Xabier; Eguiluz, Victor M.; Duarte, Carlos M.; Sousa, Lara L.; Simpson, Samantha J.; Southall, Emily J.; Sims, David W.
Effective ocean management and the conservation of highly migratory species depend on resolving the overlap between animal movements and distributions, and fishing effort. However, this information is lacking at a global scale. Here we show, using a big-data approach that combines satellite-tracked movements of pelagic sharks and global fishing fleets, that 24% of the mean monthly space used by sharks falls under the footprint of pelagic longline fisheries. Space-use hotspots of commercially valuable sharks and of internationally protected species had the highest overlap with longlines (up to 76% and 64%, respectively), and were also associated with significant increases in fishing effort. We conclude that pelagic sharks have limited spatial refuge from...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00575/68662/67587.pdf

Effet des bungalows sur pilotis des hôtels en milieu corallien sur le peuplement ichtyologique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Planes, S; Doherty, Pj.
Increasing tourism in French Polynesia has encouraged resort development, especially on three islands of the Society Archipelago (Bora-Bora, Moorea, Tahiti). Although different resort stuctures have been developed, in 1993 there were 17 hotels consisting of bungalows built on piles along the fringing reef, and this kind of construction is becoming increasingly popular. Our study was designed to estimate the impact of such buildings on the local fish communities. Visual surveys were conducted by two observers at four resorts, under three bungalows built on piles and three adjacent control sites. Overall fish diversity and abundance was higher under the bungalows, with average increases of 10 % and 100 % respectively. A multifactorial ANOVA showed that...
Tipo: Text
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00097/20864/18482.pdf

RAD sequencing sheds new light on the genetic structure and local adaptation of European scallops and resolves their demographic histories
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vendrami, David L. J.; De Noia, Michele; Telesca, Luca; Handal, William; Charrier, Gregory; Boudry, Pierre; Eberhart-phillips, Luke; Hoffman, Joseph I.
Recent developments in genomics are advancing our understanding of the processes shaping population structure in wild organisms. In particular, reduced representation sequencing has facilitated the generation of dense genetic marker datasets that provide greater power for resolving population structure, investigating the role of selection and reconstructing demographic histories. We therefore used RAD sequencing to study the great scallop Pecten maximus and its sister species P. jacobeus along a latitudinal cline in Europe. Analysis of 219 samples genotyped at 82,439 single nucleotide polymorphisms clearly resolved an Atlantic and a Norwegian group within P. maximus as well as P. jacobeus, in support of previous studies. Fine-scale structure was also...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00497/60901/64240.pdf

L'écloserie-nurserie de la SATMAR et les possibilités actuelles de production de naissain de mollusques bivalves
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Borgne, Yves.
The SATMAR hatchery-nursery is in operation since 1973 with 11 employees. The production reaches 10 million of newly settled spat per ~eek. The species reared are : Crassostrea gigas. Ostrea edulis, Mercenaria mercenaria, Venerupis decussata. Venerupis sem~decussata. Venus verrucosa. SAT~R cooperates ~th the shellfish farmers by supplying them with the necessary spat (for instance clams) and with the research laboratories (taking part in the ECOTRON program set up by CNEXO in 1975 and 1976).
Tipo: Text
Ano: 1977
URL: http://archimer.ifremer.fr/doc/00305/41595/40804.pdf

Data-based estimates of the ocean carbon sink variability – first results of the Surface Ocean pCO2 Mapping intercomparison (SOCOM)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rödenbeck, C.; Bakker, D. C. E.; Gruber, N.; Iida, Y.; Jacobson, A. R.; Jones, S.; Landschützer, P.; Metzl, N.; Nakaoka, S.; Olsen, A.; Park, G.-h.; Peylin, P.; Rodgers, K. B.; Sasse, T. P.; Schuster, U.; Shutler, J. D.; Valsala, V.; Wanninkhof, R.; Zeng, J.
Using measurements of the surface-ocean CO2 partial pressure (pCO2) and 14 different pCO2 mapping methods recently collated by the Surface Ocean pCO2 Mapping intercomparison (SOCOM) initiative, variations in regional and global sea–air CO2 fluxes have been investigated. Though the available mapping methods use widely different approaches, we find relatively consistent estimates of regional pCO2 seasonality, in line with previous estimates. In terms of interannual variability (IAV), all mapping methods estimate the largest variations to occur in the Eastern equatorial Pacific. Despite considerable spead in the detailed variations, mapping methods with closer match to the data also tend to be more consistent with each other. Encouragingly, this includes...
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00293/40407/38967.pdf

How Do Fishing and Environmental Effects Propagate Among and Within Functional Groups?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rochet, Marie-joelle; Collie, Jeremy S.; Trenkel, Verena.
Competition and predation can play different roles in mediating the influence of external pressures, such as fishing or environmental variations, on marine communities. Pressure effects propagate through food webs along predation links. These predator-prey interactions may result in trophic cascades, but they can be buffered by competitive interactions. We investigated these mechanisms by taking a functional-group approach. Are functional groups affected by external pressures in a predictable way? Within functional groups, do all species respond in the same way, or does competitive release allow for compensation among species? We constructed a simple community model, with functional groups connected by predation links. Loop analysis was used to make...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00154/26492/25465.pdf

An individual Based Model of anchovy early life stages in the Bay of Biscay: validation of vertical distribution and growth
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Huret, Martin; Petitgas, Pierre; Bourriau, Paul; Grellier, Patrick.
The objective of the study is a better understanding of recruitment variability in anchovy population. An Individual Based Model (IBM) is being developed for the full life cycle of anchovy. The early life stages are presented on this poster. The model is tested in a 1D-vertical framework for validation of the vertical distribution of modelled eggs and larvae against in-situ data. The dynamic Energy Budget (DEB) theory is the biological baseline for individual growth. We test its ability to simulate the observed growth curves between years with contrasted temperatures.
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00054/16508/14022.pdf

Bilan 1998 du réseau REPAMO - Réseau National de Surveillance zoosanitaire des mollusques marins
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thebault, Anne; Martin, Anne-genevieve; Le Coguic, Yvette; Hirata, Toshio; Tige, Gilbert; Pichot, Yves; Chollet, Bruno; Cochennec, Nathalie; Renault, Tristan.
Le réseau REPAMO répond à plusieurs objectifs, définis dans différentes Directives Européennes: prévenir et détecter l'introduction et la propagation d'un agent pathogène émergent, réémergent ou exotique pour les productions de coquillages d'intérêt commercial en France, surveiller l'évolution des maladies à déclaration obligatoire, surveiller les échanges avec nos partenaires commerciaux. Le fonctionnement repose sur la collaboration entre les professionnels, la DPMCM, les laboratoires côtiers d'IFREMER, et trois cellules d'analyses. Les prélèvements et les outils diagnostiques choisis dépendent des différents objectifs. Le suivi est fait sur des populations sauvages et cultivées du littoral français. Le nombre d'analyses progresse régulièrement grâce à...
Tipo: Text
Palavras-chave: Réseau surveillance; Pathologie; Mortalités; Mollusques marins.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00098/20904/18523.pdf

The Solutrean-Magdalenian transition: A view from Iberia
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Emili Aura, J.; Tiffagom, Marc; Jorda Pardo, Jesus F.; Duarte, Elsa; Fernandez De La Vega, Javier; Santamaria, David; De La Rasilla, Marco; Vadillo, Margarita; Perez Ripoll, Manuel.
The paper examines the Upper Solutrean-Archaic Magdalenian/Badegoulian succession on the base of lithic and bone tool production, chrono-stratigraphic data and radiocarbon dates from the Cantabrian and Mediterranean regions of Iberia, mainly the areas of Asturias and Valencia (Spain). The discussion considers a reduced number of variables (characteristic stone tools, bone points and decoration techniques) and highlights the elements in common. The analysis concerning the transformation of lithic production at Cova del Parpallo provides new data for the Upper Solutrean-Archaic Magdalenian/Badegoulian transition.
Tipo: Text
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00265/37622/36532.pdf

Wissenschaftliche Meeresuntersuchungen, Vol. 3, 4. Meeresfauna von Helgoland
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sokolowsky, Alexander.
Die Gelegenheit zur Bearbeitung der Amphipoden Helgolands verdanke ich dem Entgegen-kommen des Direktors der Königl. Biologischen Anstalt, Herrn Professors Dr. Heincke, welchem ich hierfür meinen verbindlichsten Dank sage.
Tipo: Text
Ano: 1900
URL: http://archimer.ifremer.fr/doc/1900/publication-7363.pdf

Problèmes posés par l'analyse des relations trophiques huîtres-milieu
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Deslous-paoli, Jean-marc; Heral, Maurice; Zanette, Yohann.
A relation between the evolution of biochemical components of molluscs and the available amount of food is difficult to establish. In addition to energy relations we tried to use a factorial correspondance analysis in the study on relation between the evolution of biochemical reserves of tissues of Crassostrea gigas Thunberg and the nutritional ability of the environment. The analysis showed a negative correlation between storing of carbohydrate and lipid reserves and amounts of mineral seston. In the same way, an accumulation of these reserves varies with the biomass of phytoplanctonic populations.
Tipo: Text
Palavras-chave: Marennes Oléron; Potential feeding; Oysters; Trophic relation; Marennes Oléron; Nourriture potentielle; Huîtres; Relations trophiques.
Ano: 1981
URL: http://archimer.ifremer.fr/doc/1981/acte-2939.pdf

Experimental and numerical results on VIV and WIO
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gaurier, Benoit; Germain, Gregory; Le Boulluec, Marc; Giry, Eric; Fontaine, Emmanuel.
Vortex-Induced Vibrations (VIV) are well-known and related to the majority of cylindrical structures subjected to strong winds or currents. The VIV limit the lifetime of the structure because they increase the forces and so the fatigue. When several structures of this kind are put together in close interaction, the wake effects (Wake Induced Oscillations - WIO) sometimes involve strong instabilities. If these structures are flexible or mobile, oscillations of several diameters can be observed and collisions can occur ([4] &amp; [6]). Such structures are widespread in the oil industry where the extraction of oil in deep water can be done by means of risers. In some cases, risers are connected to a floating support called FPSO (Floating Production Storage...
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-6584.pdf

The characteristics of sea bass (Dicentrarchus labrax ) eggs:Description, biochemical composition and hatching performances
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Devauchelle, Nicole; Coves, Denis.
This paper concerns eggs of captive fish and gonads of wild fish, from the Brittany coast obtained in the 7-18 degree C thermal range. The diameters of eggs, 1.07-1.32 mm are compared to those observed in other areas, especially along the Mediterranean coast. The duration of embryogenesis as a function of temperature and the efficiency of different incubators are discussed. The quality of eggs in relation with larval survival is discussed through the biochemical composition of the eggs collected in captivity compared to that of wild fish gonads. The absolute values of lipids, proteins, fatty acids, lipid classes, phosphatides and minerals measured, also the positive relations obtained between egg dry weight, diameters, mortality during incubation are...
Tipo: Text
Ano: 1988
URL: http://archimer.ifremer.fr/doc/00044/15543/12920.pdf

Aptitude des calmars à la conservation a l'état frais et congelé
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Durand, Henri; Park, Hi-yul; Hadjadj, Annie.
The continuous decrease of the stocks of species traditionally exploited by fishermen and fish processors leads them to look for new raw materials. The substitution of species becomes more necessary each day and we currently see numerous attempts at using species which used not to be sold or used. This way, different deep sea fishes (blue whiting, ratfishes...) or Antarctic fishes (nonotheniids, channichtids...) became of interest for many nations. Among the species which could be of interest for the French industry are cephalopods. The molluscs, extensively used in Asian countries (Japan, South Korea, China) remain hardly used in France, at least in the transformation industry.
Tipo: Text
Ano: 1980
URL: http://archimer.ifremer.fr/doc/1980/publication-6676.pdf

La prospective: un outil au service de la gouvernance des ressources marines vivantes en Méditerranée
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lacroix, Denis.
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00257/36827/35453.pdf

Salubrité des coquillages de pêche de la Petite Mer de Gâvres - Morbihan : Etude sanitaire 1989
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Camus, Patrick; Treguier, Cathy; Le Gars, Jean-claude.
La Petite Mer de Gâvres est une zone conchylicole classée salubre. L'activité principale actuelle est la pêche à pied semi-professionnelle ou familiale des coquillages et gastéropodes. De ce fait la denrée échappe 0 tout contrôle sanitaire.  A la suite de problèmes de salubrité rencontrés sur les coquillages de cette zone (rapport DRV 89-002 CSRU/La Trinité/Mer) une étude bactériologique plus approfondie portant principalement sur les coquillages fouisseurs (palourdes) a été entreprise pendant l'année 1989 sur 8 points d'observations.  Cette étude confirme l'insalubrité des coquillages pêchés dans la Petite Mer de Gâvres.  Malgré la proximité des sources de pollution de la Rade de Lorient et le petitesse du bassin versant il semble que ce soit ce dernier...
Tipo: Text
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00088/19963/17630.pdf

Observations sur la croissance des huîtres plates dans les claires de la Seudre
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Trochon, P.
La croissance de l'huître plate Ostrea edulis LINNE a été étudiée chaque année, de 1947 à 1959, dans les claires de la vallée de la Seudre. Le dépouillement de certaines observations recueillies au cours de ces 12 ans a permis de déterminer la croissance moyenne des huîtres plates en fonction de leur poids au moment de la mise à l'eau en claire et de mettre en évidence l'influence de conditions météorologiques et hydrologiques sur cette croissance.
Tipo: Text
Ano: 1959
URL: http://archimer.ifremer.fr/doc/1959/publication-7195.pdf

Building of the Amsterdam-Saint Paul plateau: A 10 Myr history of a ridge-hot spot interaction and variations in the strength of the hot spot source
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Maia, Marcia; Pessanha, Ivo; Courreges, Esther; Patriat, Martin; Gente, Pascal; Hemond, Christophe; Janin, Myriam; Johnson, Kevin; Roest, Walter; Royer, Jean-yves; Vatteville, Judith.
The Amsterdam-Saint Paul plateau results from a 10 Myr interaction between the South East Indian Ridge and the Amsterdam-Saint Paul hot spot. During this period of time, the structure of the plateau changed as a consequence of changes in both the ridge-hot spot relative distance and in the strength of the hot spot source. The joint analysis of gravity-derived crust thickness and bathymetry reveals that the plateau started to form at similar to 10 Ma by an increase of the crustal production at the ridge axis, due to the nearby hot spot. This phase, which lasted 3-4 Myr, corresponds to a period of a strong hot spot source, maybe due to a high temperature or material flux, and decreasing ridge-hot spot distance. A second phase, between similar to 6 and...
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00047/15865/13284.pdf

AUV surveys cold seep sites on the Nile fan
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boetius, Antje; Buffet, G; Mascle, Jean; Dupre, Stephanie; Foucher, Jean-paul.
Tipo: Text
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00185/29669/28041.pdf

The California Current System as a transmitter of millennial scale climate change on the northeastern Pacific margin from 10 to 50 ka
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Taylor, M. A.; Hendy, I. L.; Pak, D. K.
A high-resolution record of ä18O and Mg/Ca-based temperatures spanning 10–50 ka has been reconstructed from the Vancouver margin of the northeastern Pacific Ocean (MD02-2496) from two planktonic foraminiferal species, Neogloboquadrina pachyderma (s.) and Globigerina bulloides. While ä18Ocalcite appears synchronous with Dansgaard-Oeschger Interstadials throughout the record, millennial scale variability in sea surface temperatures and reconstructed ä18Oseawater are frequently out of phase with Greenland climate. Changes in water mass characteristics such as ä18Ocalcite and enriched ä15N events apparently responded to millennial-scale climate change during Marine Isotope Stage 3 (MIS 3), such that negative ä18Ocalcite excursions coincided with heavier ä15N....
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00296/40709/39706.pdf

Desulfurobacterium crinifex sp.nov., a novel thermophilic, pinkish-streamer forming, chemolithoautotrophic bacterium isolated from a Juan de Fuca Ridge hydrothermal vent and amendment of the genus Desulfurobacterium
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Alain, Karine; Rolland, Sophie; Crassous, Philippe; Lesongeur, Francoise; Zbinden, Magali; Le Gall, Christian; Godfroy, Anne; Page, Antoine; Juniper, S Kim; Cambon-bonavita, Marie-anne; Duchiron, Francis; Querellou, Joel.
A novel thermophilic, chemolithoautotrophic T bacterium, designated as NE1206(T), was isolated from a Juan de Fuca Ridge hydrothermal vent sample (tubes of the annelid polychaete Paralvinella sulfincola attached to small pieces of hydrothermal chimney). The cells were rod-shaped (1.2-3.5x0.4-0.7 mum), occurring as single motile rods or forming macroscopic aggregates visible as pinkish to brownish streamers. The new isolate was anaerobic. It grew between 50 and 70 degreesC (optimum 60-65 degreesC doubling time approximately 1 h 15 min at 60 degreesC), between pH 5.0 and 7.5 (optimum pH around 6.0-6.5) and at sea salts concentrations between 20 and 40 g l(-1) (optimum 30 g l(-1)). Cells grew chemolithoautotrophically in an H-2/CO2 atmosphere (80/20, v/v; 200...
Tipo: Text
Palavras-chave: Thermophile; Nitrate reducing; Lithotroph; Desulfurobacterium crinifex; Deep sea hydrothermal vent; Cell networks.
Ano: 2003
URL: https://archimer.ifremer.fr/doc/2003/publication-663.pdf

Detecting Regional Modes of Variability in Observation-Based Surface Ocean pCO(2)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Landschuetzer, Peter; Ilyina, Tatiana; Lovenduski, Nicole S.
We use a neural network-based estimate of the sea surface partial pressure of CO2 (pCO(2)) derived from measurements assembled within the Surface Ocean CO2 Atlas to investigate the dominant modes of pCO(2) variability from 1982 through 2015. Our analysis shows that detrended and deseasonalized sea surface pCO(2) varies substantially by region and the respective frequencies match those from the major modes of climate variability (Atlantic Multidecadal Oscillation, Pacific Decadal Oscillation, multivariate ENSO index, Southern Annular Mode), suggesting a climate modulated air-sea exchange of CO2. We find that most of the regional pCO(2) variability is driven by changes in the ocean circulation and/or changes in biology, whereas the North Atlantic variability...
Tipo: Text
Palavras-chave: Ocean; CO2; Variability; Carbon; Climate; Observations.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00675/78733/80972.pdf

The tanaid fauna from a region of the deep north-atlantic where near-bottom current velocities are high
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Reidenauer, Ja; Thistle, D.
Tipo: Text
Ano: 1985
URL: http://archimer.ifremer.fr/doc/00112/22323/19996.pdf

Gonad volume assessment in the oyster Crassostrea gigas: Comparison between a histological method and a Magnetic Resonance Imaging (MRI) method
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Flahauw, Emilie; Quellec, Stephane; Davenel, Armel; Degremont, Lionel; Lapegue, Sylvie; Hatt, Philippe-jacques.
Previous studies comparing Crassostrea gigas selected lines with different susceptibility to summer mortality concluded that the higher the reproductive effort the lower the survival. But theywere lacking individual followup of this reproductive effort which would be of great interest to help us to understand the physiology of the oysters facing summermortalities. Themost frequently usedmethod for assessing the volume of the gonad is to measure the area it occupies on histological sections. Gonad measurement by magnetic resonance imaging, in contrast, is non-destructive and therefore makes it possible to assess individual evolution as well as to compare individuals. The present study compared the values of gonad volume by thismethodwith the values of gonad...
Tipo: Text
Palavras-chave: Oyster; Crassostrea gigas; Reproduction; Histology; Magnetic resonance imaging; MRI.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00102/21309/19410.pdf

A New Coupled Ocean-Waves-Atmosphere Model Designed for Tropical Storm Studies: Example of Tropical Cyclone Bejisa (2013-2014) in the South-West Indian Ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pianezze, J.; Barthe, C.; Bielli, S.; Tulet, P.; Jullien, Swen; Cambon, Gildas; Bousquet, O.; Claeys, M.; Cordier, E.
Ocean-Waves-Atmosphere (OWA) exchanges are not well represented in current Numerical Weather Prediction (NWP) systems, which can lead to large uncertainties in tropical cyclone track and intensity forecasts. In order to explore and better understand the impact of OWA interactions on tropical cyclone modelling, a fully coupled OWA system based on the atmospheric model Meso-NH, the oceanic model CROCO and the wave model WW3 and called MSWC was designed and applied to the case of tropical cyclone Bejisa (2013-2014). The fully coupled OWA simulation shows good agreement with the literature and available observations. In particular, simulated significant wave height is within 30 cm of measurements made with buoys and altimeters. Short-term (&lt; 2 days)...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00428/53983/55169.pdf

Suivi des espèces envahissantes marines à Saint-Pierre et Miquelon. Année 2013
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sellier, Marion; Poitevin, Pierre; Goraguer, Herle; Faure, Jean-marie; Goulletquer, Philippe.
This work, conducted in 2013 , is a first monitoring of marine invasive species in Saint-Pierre and Miquelon archipelago. In global changing context on coastal ecosystems , accentuated by direct or indirect effects of human activities, it became essential to implement a survey on marine invasive species on Saint-Pierre and Miquelon shoreline. Fukui traps and tunicates collectors implemented on different stations as well as the timely completion of observational dives , have established the following conclusions : several non native species were detected within the local marine ecosystem. This species , such as Carcinus maenas , Ciona intestinalis , Botryllus schlosseri , Caprella mutica , etc. ... threaten some local marine ecosystems and some local...
Tipo: Text
Palavras-chave: Espèces marines invasives; Saint-Pierre et Miquelon; Aquaculture; Écosystème; Marine invasive species; Saint-Pierre and Miquelon; Aquaculture; Ecosystem.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00175/28635/27118.pdf

Evaluation de la qualité des zones de production conchylicole. Département des Côtes d'Armor. Edition 2019
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cheve, Julien.
Après un rappel des objectifs, du fonctionnement et de la méthode d'interprétation des résultats du réseau de contrôle microbiologique des zones de production conchylicoles (REMI) et du réseau d'observation de la contamination chimique (ROCCH), ce rapport inclut un bilan national et décrit le programme annuel du département des Côtes d'Armor (22). Il présente l'ensemble des résultats obtenus, en particulier l'estimation de la qualité microbiologique et chimique des zones de production de coquillages classées. Après le bilan très positif de 2017 et le classement de six nouvelles zones en A, le bilan de 2018 est plutôt négatif. Quatre des six nouvelles zones n'ont pas confirmé ce statut. Trois autres zones présentent ce déclassement de A vers B. Cette...
Tipo: Text
Palavras-chave: REMI; E.coli; Contamination bactériologique des coquillages; ROCCH; Contaminants chimiques; Milieu marin; Classement sanitaire des zones de production; Département 22.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00500/61204/64750.pdf

Regional and latitudinal patterns of soft-bottom macrobenthic invertebrates along French coasts: Results from the RESOMAR database
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gallon, Regis K.; Lavesque, Nicolas; Grall, Jacques; Labrune, Celine; Gremare, Antoine; Bachelet, Guy; Blanchet, Hugues; Bonifacio, Paulo; Bouchet, Vincent M. P.; Dauvin, Jean-claude; Desroy, Nicolas; Gentil, Franck; Guerin, Laurent; Houbin, Celine; Jourde, Jerome; Laurand, Sandrine; Le Duff, Michel; Le Garrec, Vincent; De Montaudouin, Xavier; Olivier, Frederic; Orvain, Francis; Sauriau, Pierre-guy; Thiebaut, Eric; Gauthier, Olivier.
This study aims to describe the patterns of soft bottom macrozoobenthic richness along French coasts. It is based on a collaborative database developed by the “Réseau des Stations et Observatoires Marins” (RESOMAR). We investigated patterns of species richness in sublittoral soft bottom habitats (EUNIS level 3) at two different spatial scales: 1) seaboards: English Channel, Bay of Biscay and Mediterranean Sea and 2) 0.5° latitudinal and longitudinal grid. Total observed richness, rarefaction curves and three incidence-based richness estimators (Chao2, ICE and Jacknife1) were used to compare soft bottom habitats species richness in each seaboard. Overall, the Mediterranean Sea has the highest richness and despite higher sampling effort, the English Channel...
Tipo: Text
Palavras-chave: Zoobenthos; Species richness; Regional pattern; Latitudinal pattern; Soft-bottom; France.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00376/48769/49166.pdf

Modification du régime des courants. Sous-région marine Manche - Mer du Nord. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lazure, Pascal.
Tipo: Text
Palavras-chave: Manche; Mer du Nord; Courants régionaux; Modifications; Impacts des activités marines.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00327/43861/43435.pdf

Radiocarbon Calibration/Comparison Records Based on Marine Sediments from the Pakistan and Iberian Margins
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bard, Edouard; Menot, Guillemette; Rostek, Frauke; Licari, Laetitia; Boening, Philipp; Edwards, R. Lawrence; Cheng, Hai; Wang, Yongjin; Heaton, Timothy J.
We present a new record of radiocarbon ages measured by accelerator mass spectrometry (AMS) on a deep-sea core collected off the Pakistan Margin. The C-14 ages measured on the planktonic foraminifera Globigerinoides ruber from core MD04-2876 define a high and stable sedimentation rate on the order of 50 cm/kyr over the last 50 kyr. The site is distant from the main upwelling zone of the western Arabian Sea where C-14 reservoir age is large and may be variable. Many independent proxies based on elemental analyses, mineralogy, biomarkers, isotopic proxies, and foraminiferal abundances show abrupt changes correlative with Dansgaard-Oeschger and Heinrich events. It is now common knowledge that these climatic events also affected the Arabian Sea during the last...
Tipo: Text
Palavras-chave: Berian Margin; Pakistan Margin; 14C; Calibration.
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00264/37569/35852.pdf

Stratégie d'exploitation des zones de pêche d'un chalutier hauturier du Guilvinec
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pichon, Jacques.
The Bigouden region's fishing is significant by the tonnage landed, the quality of the production and high sales price. That makes Guilvinec "an ideal laboratory for analysing the fish business in all its complexity, from the catch to marketing". The fishermen of the Guilvinec district are spread out in 3 ports: Guilvinec, Loctudy, and Saint Guénolé. Each port has its speciality (example: Guilvinec's speciality is monkfish). Each fleet is composed of dinghies, coastal trawls, seafaring fish trawls, and seafaring crayfish trawls. The subject chosen for this master's theses is the study of the fishing strategy of a seafaring ship, the Kerflous. This work was difficult because it reached into the sphere of the professional secret. The Kerflous works at the...
Tipo: Text
Palavras-chave: Celtic sea; Trawler; Fishing strategy; Fishing zones; Product quality; Bigouden; Guilvinec; Brittany; Chalutier; Mer Celtique; Stratégie de pêche; Zones de pêche; Qualité; Guilvinec; Bigouden.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/these-2560.pdf

Département Gironde. 2018. Activité des navires de pêche.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d’Informations Halieutiques » (SIH) de l’Ifremer, qui constitue le réseau d’observation des ressources halieutiques et des usages associés. Ce projet s’inscrit dans la mission de service d’intérêt public de l’Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l’analyse du secteur des pêches, le SIH a en charge l’élaboration d’indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche et du grand public.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00608/71988/70692.pdf

Cold-water corals in the Subpolar North Atlantic Ocean exposed to aragonite undersaturation if the 2 °C global warming target is not met
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: García-ibáñez, Maribel I.; Bates, Nicholas R.; Bakker, Dorothee C.e.; Fontela, Marcos; Velo, Antón.
The net uptake of carbon dioxide (CO2) from the atmosphere is changing the ocean's chemical state. Such changes, commonly known as ocean acidification, include a reduction in pH and the carbonate ion concentration ([CO32−]), which in turn lowers oceanic saturation states (Ω) for calcium carbonate (CaCO3) minerals. The Ω values for aragonite (Ωaragonite; one of the main CaCO3 minerals formed by marine calcifying organisms) influence the calcification rate and geographic distribution of cold-water corals (CWCs), important for biodiversity. Here, high-quality measurements, collected on thirteen cruises along the same track during 1991–2018, are used to determine the long-term changes in Ωaragonite in the Irminger and Iceland Basins of the North Atlantic...
Tipo: Text
Palavras-chave: Ocean acidification; Aragonite saturation state; Atlantic Meridional Overturning Circulation; Eastern-Subpolar North Atlantic Ocean.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00688/79965/82895.pdf

Distribution patterns of benthic foraminifera on floor of mediterranean sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cita, Mb; Zocchi, M.
Tipo: Text
Ano: 1978
URL: http://archimer.ifremer.fr/doc/00123/23399/21226.pdf

Testing methods to assess both the efficacy and ecotoxicity of antifouling coatings
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Quiniou, Francoise; Compere, Chantal; Caisey, Xavier; Davy, Romain; Matarere, Marcel; Mazeas, Florence; Peleau, Michel.
Since 1998, the European Biocidal Products Directive (BPD; 98/8/EC), applied to 23 product types (PT) for specific uses, including PT 21 the « antifouling products », regulates biocidal products before they are placed on the market.  On the one hand, the efficacy of active substances and their formulations must be demonstrated for their specific employment ; on the other hand their non impact on workers neither users and environment must be proved and specifically against non target species.  Standard protocols for the assessment of efficacy or ecotoxicity of antifouling substances are proposed within the framework of the Ecopaint and Paintclean projects which are founded by the french industry Ministery and labellised by the “Pôle Mer” (Paca and...
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00040/15133/12471.pdf

Global data set for nitrogen and carbon stable isotopes of tunas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bodin, Nathalie; Pethybridge, Heidi; Duffy, Leanne M.; Lorrain, Anne; Allain, Valerie; Logan, John M.; Ménard, Frederic; Graham, Brittany; Choy, C. Anela; Somes, Christopher J.; Olson, Robert J.; Young, Jock W.
Nitrogen and carbon stable isotope data sets are commonly used to assess complex population to ecosystem responses to natural or anthropogenic changes at regional to global spatial scales, and monthly to decadal timescales. Measured in the tissues of consumers, nitrogen isotopes (δ15N) are primarily used to estimate trophic position while carbon isotopes (δ13C) describe habitat associations and feeding pathways. Models of both δ15N and δ13C values and their associated variance can be used to estimate likely dietary contributions and niche width and provide inferences about consumer movement and migration. Stable isotope data have added utility when used in combination with other empirical data sets (e.g., stomach content, movement tracking,...
Tipo: Text
Palavras-chave: Baseline isotopic variability; Food web dynamics; Global Ocean; Marine top predators; Pelagic ecosystem; Scombrids; Trophic position.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00665/77750/79872.pdf

Increased bacterial growth efficiency with environmental variability: results from DOC degradation by bacteria in pure culture experiments
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Eichinger, M.; Sempere, R.; Gregori, G.; Charriere, B.; Poggiale, J. C.; Lefevre, D.
This paper assesses how considering variation in DOC availability and cell maintenance in bacterial models affects Bacterial Growth Efficiency (BGE) estimations. For this purpose, we conducted two biodegradation experiments simultaneously. In experiment one, a given amount of substrate was added to the culture at the start of the experiment whilst in experiment two, the same amount of substrate was added, but using periodic pulses over the time course of the experiment. Three bacterial models, with different levels of complexity, (the Monod, Marr-Pirt and the dynamic energy budget - DEB - models), were used and calibrated using the above experiments. BGE has been estimated using the experimental values obtained from discrete samples and from model...
Tipo: Text
Ano: 2010
URL: https://archimer.ifremer.fr/doc/00372/48311/48417.pdf

Detection of ostreid herpesvirus 1 (OsHV-1) DNA in seawater by PCR: influence of water parameters in bioassays
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vigneron, Vassilia; Solliec, Gaelle; Montanie, Hélène; Renault, Tristan.
Since 1991, herpesvirus infections have been reported among larvae and juveniles of various bivalves. Most of the studies focused on detection of viral infections of economically important species. However, the persistence of bivalve herpesviruses; in the marine environment is poorly documented. The present study concerns the role of seawater parameters in Ostreid Herpesvirus I (OsHV-1) detection by polymerase chain reaction (PCR). Viral DNA extracted from purified particles or virions present in infected oyster larvae were detected by PCR after storage in different media at different temperatures. The lowest detection threshold was found using distilled water or Tris EDTA buffer. In seawater, the threshold was higher. The use of sterile media permitted...
Tipo: Text
Palavras-chave: Temperature; PCR; Detection; Seawater; Viral DNA; Oyster herpesvirus 1.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-2909.pdf

Effet de la conservation et mode de préparation optimal sur la mesure des sulfures dans des échantillons d'eaux et Effet des sulfures sur la mesure de l'ammonium dans des échantillons d'eaux par fluorescence
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Caprais, Jean-claude; Le Bruchec, Julie.
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00172/28360/26650.pdf

Etude hydrobiologique du site de Dunkerque. Réseau national d'observation de la qualité du milieu marin
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bougard, M; Dewarumez, N; Menu, D; Richard, A; Souplet, A.
Lors de sa réunion du 6 décembre 1972, le Conseil Interministériel d'action pour la Nature et l'Environnement, a décidé la création du Réseau National d'Observation de la Qualité du Milieu Marin (R.N.O.) Le but du réseau est de permettre de rassembler les données concernant la situation écologique du milieu, de signaler l'état de pollution, de faire l'état des ressources et préciser l'état sanitaire du littoral (*). Dans une première phase (1er juin 1974- 30 septembre 1975), six points d'appui ont été mis en place. Les paramètres pris en compte concernaient les caractéristiques physico-chimiques de l'eau et les polluants. Durant la deuxième phase (à partir du 1er octobre 1975), le Réseau s'est doté de sept nouveaux points d'appui. Des paramètres...
Tipo: Text
Ano: 1978
URL: http://archimer.ifremer.fr/doc/00037/14777/12086.pdf

NAOS: Profileurs Deep Arvor &amp; Argos-3 – 4ème Réunion annuelle
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dutreuil, Vincent; Andre, Xavier; Le Reste, Serge; Thierry, Virginie; Renaut, Corentin; Brault, Patrice; Sagot, Jerome; David, Arnaud.
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00280/39081/37646.pdf

Decline of cold-water fish species in the Bay of Somme (English Channel, France) in response to ocean warming
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Auber, Arnaud; Gohin, Francis; Goascoz, Nicolas; Schlaich, Ivan.
A growing number of studies have documented increasing dominance of warm-water fish species (“tropicalisation”) in response to ocean warming. Such reorganization of communities is starting to occur in a multitude of local ecosystems, implying that tropicalisation of marine communities could become a global phenomenon. Using 32 years of trawl surveys in the Bay of Somme (English Channel, France), we aimed to investigate the existence of a tropicalisation in the fish community at the local scale of the estuary during the mid-1990s, a period where an exceptional temperature rise occurred in Northeast Atlantic. A long-term response occurred (with a major transition over 6 years) that was characterized by a marked diminution in the abundance of cold-water...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00374/48551/48873.pdf

Importance of El Nino reproducibility for reconstructing historical CO2 flux variations in the equatorial Pacific
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Watanabe, Michio; Tatebe, Hiroaki; Koyama, Hiroshi; Hajima, Tomohiro; Watanabe, Masahiro; Kawamiya, Michio.
Based on a set of climate simulations utilizing two kinds of Earth system models (ESMs) in which observed ocean hydrographic data are assimilated using exactly the same data assimilation procedure, we have clarified that the successful simulation of the observed air-sea CO2 flux variations in the equatorial Pacific is tightly linked to the reproducibility of coupled physical air-sea processes. When an ESM with a weaker ENSO (El Nino-Southern Oscillations) amplitude than that of the observations was used for historical simulations with ocean data assimilation, the observed equatorial anticorrelated relationship between the sea surface temperature (SST) and the air-sea CO2 flux on interannual to decadal timescales could not be represented. The simulated CO2...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00668/78004/80257.pdf

Effet d’une espèce ingénieur sur la diversité et le fonctionnement des communautés benthiques : l’habitat récifal à Sabellaria alveolata
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Jones, Auriane.
Coastal zones worldwide are home to a large diversity of ecosystem engineers that perform key functions such as the recycling of organic matter and nutrients. The habitats resulting from the biological activity of these species are exposed to numerous disturbances such as over harvesting and trampling or via coastal modification. In this context, it is becoming key to understand the functioning of these engineered habitats and how they are affected by increasing disturbances. During my PhD, I used the reef habitat built by the gregarious tubiculous polychaete Sabellaria alveolata as a study case. First, the environmental and biotic changes associated with the establishment of a S. alveolata reef and its increasing disturbance were assessed, focusing on...
Tipo: Text
Palavras-chave: Ingénieur de l’écosystème; Habitat récifal; Macrofaune benthique; Diversité fonctionnelle et isotopique; Production primaire benthique; Réseau trophique; Flux biogéochimiques; Traits biologiques; Ecosystem engineer; Reef habitat; Benthic macrofauna; Functional and isotopic diversity; Facilitation; Benthic primary production; Food web; Biogeochemical fluxes; Isoscape; Biological traits.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00498/60960/64363.pdf

The Amazonian Savannas of French Guiana: Cultural and Social Importance, Biodiversity, and Conservation Challenges
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Stier, Anna; De Carvalho, William D.; Rostain, Stephen; Catzeflis, Francois; Claessens, Olivier; Dewynter, Mael; Mckey, Doyle; Mustin, Karen; Palisse, Marianne; De Thoisy, Benoit.
The Amazonian savannas of French Guiana are rare and of high ecological and cultural value but are also highly threatened. They are socioecological systems that have been coconstructed by humans and nature and today form mosaic landscapes along the country's coast. From pre-Columbian raised fields through colonial and Creole uses to contemporary uses, they have been largely shaped and modified by human activities. They are currently threatened by changes in fire regimes, agricultural practices, invasive species, and infrastructure development. Less than 3% are protected, despite their importance for several endangered animal and plant species. A shift is required in the way we think about their conservation to create a new strategy that would be completely...
Tipo: Text
Palavras-chave: Archeology; Biodiversity; Conservation; French Guiana; Savanna; Socioecological systems.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00607/71928/70614.pdf

Quantifying the roles of ocean circulation and biogeochemistry in governing ocean carbon-13 and atmospheric carbon dioxide at the last glacial maximum
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tagliabue, A.; Bopp, L.; Roche, D. M.; Bouttes, N.; Dutay, J. -c.; Alkama, R.; Kageyama, M.; Michel, E.; Paillard, D.
We use a state-of-the-art ocean general circulation and biogeochemistry model to examine the impact of changes in ocean circulation and biogeochemistry in governing the change in ocean carbon-13 and atmospheric CO2 at the last glacial maximum (LGM). We examine 5 different realisations of the ocean's overturning circulation produced by a fully coupled atmosphere-ocean model under LGM forcing and suggested changes in the atmospheric deposition of iron and phytoplankton physiology at the LGM. Measured changes in carbon-13 and carbon-14, as well as a qualitative reconstruction of the change in ocean carbon export are used to evaluate the results. Overall, we find that while a reduction in ocean ventilation at the LGM is necessary to reproduce carbon-13 and...
Tipo: Text
Ano: 2009
URL: https://archimer.ifremer.fr/doc/00218/32919/31408.pdf

Global integration of European tuna markets
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Jimenez-toribio, Ramon; Guillotreau, Patrice; Mongruel, Remi.
This paper evaluates the degree of integration between the world market and the major European marketplaces of frozen and canned tuna through both vertical and horizontal price relationships. Spatial linkages are investigated horizontally in order to estimate the connection between the European market and the world-wide market on the primary stage of the value chain. One of the key results is the high level of market integration at the ex-vessel stage, and the price leadership of yellowfin tuna over skipjack tuna. The same approach is applied at the ex-factory level. Basically, the European market for final goods appears to be segmented between the Northern countries consuming low-priced canned skipjack tuna imported from Asia (mainly Thailand) and the...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00011/12229/9796.pdf

Noanelia hartmanae gen. sp. n., ampharetidae (annélides polychètes sédentaires), abyssal du golfe de gascogne
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Desbruyeres, Daniel; Laubier, Lucien.
A new ampharetid (sedentary polychaetous annelid) has been collected in the deep sea between 2100 and 4200 meters depth in the northern part of the Gulf of Biscay. It represents the type of a new genus, Noanelia gen. n., rather isolated within the family. Some generic feature s can beconsidered as primitive. [NOT CONTROLLED OCR]
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1976
URL: http://archimer.ifremer.fr/doc/1976/publication-4991.pdf

Habitats particuliers de l’infralittoral. Sous-région marine Golfe de Gascogne. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hily, Christian; Kerninon, Fanny.
Tipo: Text
Palavras-chave: Golfe de Gascogne; Habitats particuliers; Infralittoral; Herbiers; Zostère; Maërl; Modioles; Huîtres plates; Vers polychètes.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00329/44021/43593.pdf

Dépistage des sources de pollutions microbiologiques en Seudre amont et dans le bassin de Marennes Oléron
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Auger, Christian; Courtois, Olivier; Kantin, Roger; Masson, Daniel; Piquet, Jean-come; Roesberg, Didier.
The oyster culture basin of Marennes - Oléron is characterized by the tastiness of its oysters and the good quality of its waters, and thus of its shellfish. On that account, the quasi-totality of the production areas are ranked A for non-burrowing shellfishes, thus confirming the privileged character of the basin. This microbiological and chemical quality contributing to the reputation of the basin's shellfish farms needs to be preserved. In this purpose, the Regional Shellfish Culture Section of Marennes - Oléron (SRC) approached the Ifremer in order to continue the monitoring of the microbiological quality carried out on different production areas susceptible to be affected by some bacteriological contaminations leading to a deterioration of the...
Tipo: Text
Palavras-chave: Contrôle; Contamination; Seudre; Bassin de Marennes Oléron; Surveillance; Pollution microbiologique.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/rapport-6304.PDF

Etude de la contamination de la langouste blanche Panulirus argus et de la langouste brésilienne P. guttatus par la chlordécone le long de la côte atlantique de la Martinique. Campagnes 2011
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bertrand, Jacques; Dromer, Clement; Reynal, Lionel.
Spiny lobsters are an important component of the coastal fisheries around the Martinique island. This study aimed to assess the contamination by kepone of the two main species Panulirus argus and P. guttatus in the main fishery area laying along the eastern coast of Martinique. The objectives of the study were to describe the distribution of the spiny lobster contamination in the area, to explore possible relationships with some biological parameters such as individual size, sex and colour of tegument, as well as characterize difference of kepone concentration between the muscle and soft flesh of the head, in view of helping the definition of further fishery management measures. The analyses were done from chemical analyses of 125 samples of spiny lobsters...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00088/19971/17638.pdf

The Biogeochemistry of Electroactive Humic Substances and Its Connection to Iron Chemistry in the North East Atlantic and the Western Mediterranean Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dulaquais, Gabriel; Waeles, Mathieu; Gerringa, Loes J. A.; Middag, Rob; Rijkenberg, Micha J. A.; Riso, Ricardo.
We present the zonal distribution of electroactive humic-like substances (eHS) along a section from Offshore Portugal in the North East Atlantic to the Sicily Channel in the Mediterranean Sea. The concentrations were normalized to Suwannee River Fulvic Acid and ranged from 11g/L to 81g/L. The vertical distributions were typical of those previously reported for dissolved organic carbon in the Mediterranean Sea. High eHS concentrations were measured in surface water and concentrations decreased with depth before increasing again toward benthic maxima measured at some stations. We estimate that eHS represented a relatively small fraction of the natural organic matter in the Mediterranean Sea (2-5%) but considering their important role in the complexation and...
Tipo: Text
Palavras-chave: Humic substances; Iron; Mediterranean Sea; Biogeochemistry; GEOTRACES.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00616/72781/72218.pdf

Bilan des mortalités estivales de naissains d'huîtres Normandie, 1995
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kopp, Joel; Joly, Jean-pierre.
Des mortalités estivales de naissain avaient déjà été signalées en 1994, particulièrement dans la partie nord de la côte Ouest du Cotentin (de Pirou à Denneville), avec des pertes observées d'environ 30 %. L'examen histologique de deux échantillons provenant de lots très touchés (d'origine naturelle ou produits en écloserie) avaient montré la présence d'herpès-virus, sans que l'on puisse établir de relation entre ces mortalités et cette infestation. Ces mortalités se sont reproduites durant l'été 1995, mais ont touché un beaucoup plus grand nombre de lots de naissain dans l'ensemble des trois bassins conchylicoles normands.
Tipo: Text
Palavras-chave: Huître creuse; Crassostrea gigas; Mortalités; Naissain; Normandie.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00072/18372/15944.pdf

Réseau de surveillance benthique - Région Bretagne - Approche sectorielle intertidale : cartographie des habitats benthiques - Secteur des Abers
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rollet, Claire; Loarer, Ronan; Bonnot-courtois, Chantal; Hamon, Nolwenn.
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00056/16756/14197.pdf

Culture of sea bass (Dicentrarchus labrax L)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Coves, Denis; Dewavrin, Guirrec; Breuil, Gilles; Devauchelle, Nicole.
Tipo: Text
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00049/16021/13482.pdf

Impact of Xynthia Tempest on Viral Contamination of Shellfish
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Grodzki, Marco; Ollivier, Joanna; Le Saux, Jean-claude; Piquet, Jean-come; Noyer, Mathilde; Le Guyader, Soizick.
Viral contamination in oyster and mussel samples was evaluated after a massive storm with hurricane wind named "Xynthia tempest" destroyed a number of sewage treatment plants in an area harboring many shellfish farms. Although up to 90% of samples were found to be contaminated 2 days after the disaster, detected viral concentrations were low. A 1-month follow-up showed a rapid decrease in the number of positive samples, even for norovirus.
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00079/18992/17216.pdf

Rising the Persian Gulf Black-Lip Pearl Oyster to the Species Level: Fragmented Habitat and Chaotic Genetic Patchiness in Pinctada persica
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ranjbar, Mohammad Sharif; Zolgharnien, Hossein; Yavari, Vahid; Archangi, Bita; Salari, Mohammad Ali; Arnaud-haond, Sophie; Cunha, Regina L.
Marine organisms with long pelagic larval stages are expected to exhibit low genetic differentiation due to their potential to disperse over large distances. Growing body of evidence, however, suggests that marine populations can differentiate over small spatial scales. Here we focused on black-lip pearl oysters from the Persian Gulf that are thought to belong to the Pinctada margaritifera complex given their morphological affinities. This species complex includes seven lineages that show a wide distribution ranging from the Persian Gulf (Pinctada margaritifera persica) and Indian Ocean (P. m. zanzibarensis) to the French Polynesia (P. m. cumingii) and Hawai'i (P. m. galtsoffi). Despite the long pelagic larval phase of P. m. persica, this lineage is absent...
Tipo: Text
Palavras-chave: Black-lip pearl oysters; Pinctada persica; Species delimitation; Persian Gulf; Fragmented habitat.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00319/43040/42631.pdf

Euphausiacés des bancs de terre-neuve de Nouvelle écosse et du golfe du Maine
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Soulier, Bernadette.
The material studied in this work was collected by the Institute of Marine Fisheries' oceanographic vessel "Thalassa" during two cruises carried out between July and August 1961, on the Big Bank of Newfoundland and on the banks of Nova Scotia, for the first one and between July and September 1962, on the same banks and in the Gulf of Maine, for the second one. Some Euphausiids were collected from 53 stations whose characteristics are attached and that can be divided into three groups corresponding to three distinct geographical regions between which two channels (Laurentian channel and Fundy channel) enable the inflow of off-shore waters (fig. 1). The first group relates to the Gulf of Maine and the Georges Bank, the second group made of samples from both...
Tipo: Text
Ano: 1965
URL: http://archimer.ifremer.fr/doc/1965/publication-3991.pdf

Spatial scales of mesoscale variability in the North-Atlantic as deduced from geosat data
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Traon, Pierre-yves; Rouquet, Mc; Boissier, C.
Two years of Geosat data were used to systematically investigate the mesoscale variability and spatial scales of the North Atlantic. We first calculated sea surface height variability and eddy kinetic energy. These compare well with the eddy kinetic energy obtained with surface drifters. Then the spatial scales of mesoscale variability were characterized in 10° (latitude) × 10° (longitude) areas by their wave number spectra and autocorrelation functions. Comparison with existing in situ data shows good agreement, and it is believed that the total error budget is globally below that of the oceanic signal. The wave number spectra show significant differences as a function of latitude and longitude, and these can be related to different types of forcing...
Tipo: Text
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00078/18934/17062.pdf

Habitat heterogeneity influences cold-seep macrofaunal communities within and among seeps along the Norwegian margin. Part 1: macrofaunal community structure
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Decker, Carole; Morineaux, Marie; Van Gaever, Saskia; Caprais, Jean-claude; Lichtschlag, Anna; Gauthier, Olivier; Andersen, Ann C.; Olu, Karine.
Håkon Mosby mud volcano (HMMV) is one of the most active and most studied seep sites in European waters. Many authors have described its thermal activity, dynamic of mud flows, and geochemical and microbial processes. It is characterised by a concentric zonation of successive biogenic habitats related to an activity and geochemical gradient from its centre to its periphery. Around the central area covered by mud flows, white and grey microbial mats occur among areas of bare sediment, whereas siboglinid tubeworm fields of Sclerolinum contortum and/or Oligobrachia haakonmosbiensis colonise the peripheral areas. The meiofaunal community is known to be structured among habitats, but the macrofauna has rarely been investigated and has never been sampled in...
Tipo: Text
Palavras-chave: Cold-seep; Community structure; Macrofauna; Norwegian margin; Polychaeta.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00074/18517/16130.pdf

Benthic Boundary-Layer macrofauna from the upper continental-slope and the Cap-Ferret canyon (Bay of Biscay)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dauvin, Jc; Sorbe, Jc; Lorgere, Jc.
A new version of a hyperbenthic sledge with four superposed nets was used from 346 m to 3070 m depth in the southern part of the Bay of Biscay. This gear collects the near-bottom swimming macrofauna. The dominant zoological groups are asellot isopods and gammaridean amphipods. Two types of animal density gradient are observed: a vertically decreasing gradient from the lower to the upper level of the sledge at each station; and a depth-related decreasing gradient from the upper continental slope to the lowest stations in the Cap Ferret Canyon. Three different assemblages can be distinguished: between 346 m and 523 m on muddy sand; between 600 m and 1100 m on mud; and in Cap Ferret Canyon between 3040 m and 3070 m on mud. These results are compared with...
Tipo: Text
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00096/20767/18393.pdf

S. Y. Belgica expedition 1897-1899. Volume 5. Geology and some fossils plants of Magellanic lands
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pelikan, A; Gilkinet, A.
Les échantillons de plantes fossiles recueillis par l'Expédition antarctique belge sont au nombre de quatorze ; ils proviennent du Passo de Cabeza del Mar, près de Pecket Harbour, détroit de Magellan, c'est-à-dire d'un endroit où la carte géologique de NORDENSKIÖLD ne mentionne pas la présence de couches tertiaires. De ces quatorze échantillons, trois ne présentent que des debris indéterminables, empreintes de tiges assez fortes ayant appartenu peut-être à des hêtres. [OCR NON CONTRÔLE]  [Partie Géologie en allemand]
Tipo: Text
Ano: 1910
URL: http://archimer.ifremer.fr/doc/1910/publication-7424.pdf

Recovery potential of macrozoobenthos from dredging in shallow brackish waters
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bonsdorff, E.
Benthic colonization following physical disturbance was studied in shallow brackish waters at the SW coast of Finland, northern Baltic Sea. Following sand suction and periodic stagnation an annual colonization pattern is described in relation to continuous succession following channel dredging. The importance of different colonization mechanisms is discussed. The number of species recovers faster than abundance and biomass, and recovery from dredging may take as long as 5 years. Experiments show the stock of colonizing species and the immigration distance to be major structuring factors in macrozoobenthic community development.
Tipo: Text
Ano: 1983
URL: http://archimer.ifremer.fr/doc/00247/35776/34289.pdf

Review of the hydrothermal vent shrimp genus Mirocaris, redescription of M-fortunata and reassessment of the taxonomic status of the family Alvinocarididae (Crustacea : Decapoda : Caridea)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Komai, T; Segonzac, Michel.
The hydrothermal vent shrimp genus Mirocaris is reviewed. Morphological comparison between the two nominal species in the genus, M. fortunata and M. keldyshi, was made based on the re-examination of the holotype and paratypes of Mirocarisfortunata and the paratypes of M. keldyshi. Samples newly collected from various sites on the Mid-Atlantic Ridge were also examined. The validity of the genus Mirocaris has been confirmed. However, our study has revealed that the supposed morphological characters distinguishing M. fortunata and M. keldyshi do not provide significant taxonomic differences and further comparison failed to detect morphological differences between the two taxa. Thus M. keldyshi is synonymized with M. fortunata, and so there is only one single...
Tipo: Text
Palavras-chave: Hydrothermalism; Mid Atlantic Ridge; Redescription; Synonym; Taxonomy; M. keldyshi; Mirocaris fortunata.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/publication-883.pdf

Multi-isotope approach of Pb, Cu and Zn in urban aerosols and anthropogenic sources improves tracing of the atmospheric pollutant sources in megacities
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Souto-oliveira, C. E.; Babinski, M.; Ferreira Araujo, Daniel; Weiss, D. J.; Ruiz, I. R.
Studies including multiple isotope systems in aerosols promises unparalleled insights into sources and pathways of metals in the atmosphere. However, such studies remain rare because of the challenges associated with small sample sizes and low analyte masses of the target elements. Here, we present the first study combining accurate and precise determination of Pb, Cu and Zn isotopic ratios in aerosols and anthropogenic materials collected in São Paulo, Brazil. We use a sequential ion chromatography procedure with two different resins for the separation and purification of the analytes. Multi collector mass spectrometry is used for the accurate and precise determination of the isotope ratios. Long term analytical reproducibilities are ±0.035 for...
Tipo: Text
Palavras-chave: Multi-isotope systems Ion exchange chromatography Pb; Cu; Zn isotopes Non-traditional isotopes Aerosol Reference material Urban pollution Atmosphere Source tracing.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00466/57815/60100.pdf

Teneur en oxygène des eaux de la méditerranée occidentale (supplément à l'étude hydrologique de Juin-Juillet 1957)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Furnestin, Jean.
In reports from Danish oceanographic cruises (1908-1910), Jacobsen (1912) carried out a study on the oxygen concentration of Mediterranean waters that forms, as does Nielsen's study on temperature and salinity, the basis of our knowledge on the hydrology of the Mediterranean Sea. Jacobsen's study focused on the daily variation in oxygen in surface waters and seasonal variation at different depths....
Tipo: Text
Ano: 1960
URL: http://archimer.ifremer.fr/doc/1960/publication-4283.pdf

Nitrogen and phosphorus recycling mediated by copepods in Western Tropical South Pacific
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Valdés, Valentina; Carlotti, François; Escribano, Ruben; Donoso, Katty; Pagano, Marc; Molina, Veronica; Fernandez, Camila.
Zooplankton play a key role in the regeneration of nitrogen and phosphorus in the ocean through grazing and metabolism. This study investigates the role of the organic and inorganic nitrogen and phosphorus compounds released by copepods on biogeochemical processes and on the microbial community composition during the OUTPACE cruise (18 February–3 April 2015) at three long duration stations (LD). Two LD stations were located in the Melanesian Archipelago region (MA; LD A and LD B) and one in the South Pacific Gyre (SG; LD C), which represent oligotrophic and ultraoligotrophic regions respectively. At each station, microcosm onboard experiments were performed with locally sampled organisms, comprising a mix of epipelagic copepods fed with their natural food...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00422/53391/54253.pdf

Ultrafiltration for environment safety in shellfish production: removal of oyster gametes in hatchery effluents
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cordier, Clémence; Stavrakakis, Christophe; Dupuy, Beatrice; Papin, Mathias; Sauvade, Patrick; Coelho, Franz; Moulin, Philippe.
Triploid oysters are favoured by the aquaculture industry because of their sterility, which results in two advantages: a faster growth than natural oysters and a constant quality throughout all the year, which is attractive for consumers. In France, these oysters are mainly produced by mating natural and tetraploid oysters whose production poses a risk for marine environmental biodiversity if biological material is released into the environment. Therefore, effluents from farms which could produce those kinds of oysters must be treated. The objective of this work was to treat shellfish hatchery effluents by ultrafiltration. The retention of gametes by the membrane, was validated for different scenario, 5 log removals were obtained, and their viability was...
Tipo: Text
Palavras-chave: Ultrafiltration; Hatchery effluents; Oyster gametes removal; Marine biodiversity.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00472/58333/60886.pdf

Les enjeux de la recherche en économie maritime
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Abric, M; Weber, Jacques.
In September 1989, Mr Pierre Papon, Chairman of the IFREMER, expressed his wish for a study on the issues of research in marine economy. Carried out under the direction of Jacques Weber, this document is the result of this study. Dealing with marine economy equals, mutatis mutandis, dealing with terrestrial economy: the uniqueness of the subject, economy, as that of the marine element, hides a wide heterogeneity and a multiplicity of research questions. This is the reason why eight different fields were chosen to be investigated. It was decided to take an inventory, for each field, of all the specialised research centres, and to interview their directors or some specialists. Interviews were thus carried out by sector.
Tipo: Text
Palavras-chave: SEM; Economie travail; Aménagement; Gestion; Recherche; Economie maritime.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/1990/rapport-3903.pdf

Programme de surveillance chimique des zones conchylicoles. Bilan scientifique et technique 2020
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Grouhel-pellouin, Anne; Briant, Nicolas; Marchand, Philippe.
Le ROCCH produit les données chimiques nécessaires à l'évaluation de la qualité chimique des eaux marines, et notamment la qualité des zones conchylicoles françaises. En 2020, un total de 110 échantillons de mollusques collectés et analysés (dont 40 points hors zones conchylicoles suivies) permet de dresser un bilan de la qualité des côtes métropolitaines. Un secteur présente une non – conformité avec le dépassement de la teneur admissible en plomb dans les moules de la baie de Daoulas (sud – est de la rade de Brest). Plusieurs secteurs atteignent ou dépassent 50 % de la concentration-seuil : le nord de la rade de Brest (HAP), le sud de la rade de Brest (plomb et cadmium), le pertuis charentais (cadmium), l’estuaire de la Gironde (cadmium), l’étang de...
Tipo: Text
Palavras-chave: Chimie; Zone conchylicole; Mollusques; ROCCH; France.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00692/80452/83591.pdf

Technical measures (STECF-17-02)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Scientific, Technical and Economic Committee for Fisheries (STECF).
Commission Decision of 25 February 2016 setting up a Scientific, Technical and Economic Committee for Fisheries, C(2016) 1084, OJ C 74, 26.2.2016, p. 4–10. The Commission may consult the group on any matter relating to marine and fisheries biology, fishing gear technology, fisheries economics, fisheries governance, ecosystem effects of fisheries, aquaculture or similar disciplines. An Expert Working Group of the STECF was convened to develop guidelines for future evaluations by STECF of alternative technical measures that deviate from the baseline standards established at European Union level.
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00416/52698/53568.pdf

Assessing the sensitivity of bivalve populations to global warming using an individual-based modelling approach
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thomas, Yoann; Bacher, Cedric.
Climate change exposes benthic species populations in coastal ecosystems to a combination of different stressors (e.g. warming, acidification and eutrophication), threatening the sustainability of the ecological functions they provide. Thermal stress appears to be one of the strongest drivers impacting marine ecosystems, acting across a wide range of scales, from individual metabolic performances to geographic distribution of populations. Accounting for and integrating the response of species functional traits to thermal stress is therefore a necessary step in predicting how populations will respond to the warming expected in coming decades. Here, we developed an individual‐based population model using a mechanistic formulation of metabolic processes...
Tipo: Text
Palavras-chave: Benthic species; Biogeography; Climate scenario; Dynamic energy budget; Global warming; Phenology; Population dynamics; Temperature tolerance.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00450/56163/57710.pdf

Suivi DCE 2017 « macroalgues subtidales » dans la masse d’eau « côte basque » et « macroalgues intertidales » dans la masse d’eau de transition « Adour aval ».
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: De Casamajor, Marie-noelle; Lissardy, Muriel; Sanchez, Florence; Saguet, Cassandre.
This report describe sampling campaign 2017 related to data collection for WFD macroalgae indicators. The parameters concerned are "subtidal macroalgae" for coastal water body “Basque coast” and “intertidal macroalgae” for the transition water body “Adour aval”. The data treatment and the indicator calculation will be done in a second step.
Tipo: Text
Palavras-chave: Indicateur DCE; Masse d’eau; Macroalgue; Subtidal; Intertidal; Indicator WDF; Water body; Macroalgae; Subtidal; Intertidal.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00410/52177/53094.pdf

Several deep-sea mussels and their associated symbionts are able to live both on wood and on whale falls
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lorion, Julien; Duperron, Sebastien; Gros, Olivier; Cruaud, Corinne; Samadi, Sarah.
Bathymodiolin mussels occur at hydrothermal vents and cold seeps, where they thrive thanks to symbiotic associations with chemotrophic bacteria. Closely related genera Idas and Adipicola are associated with organic falls, ecosystems that have been suggested as potential evolutionary 'stepping stones' in the colonization of deeper and more sulphide-rich environments. Such a scenario should result from specializations to given environments from species with larger ecological niches. This study provides molecular-based evidence for the existence of two mussel species found both on sunken wood and bones. Each species specifically harbours one bacterial phylotype corresponding to thioautotrophic bacteria related to other bathymodiolin symbionts. Phylogenetic...
Tipo: Text
Palavras-chave: Idas; Adipicola; Molecular taxonomy; Organic falls; Symbiosis; Thioautotrophy.
Ano: 2009
URL: https://archimer.ifremer.fr/doc/00206/31680/30056.pdf

Développement d'un programme régional intégré sur le Golfe de Fos et l'Etang de Berre - Etang de Berre : évaluation des rejets polluants
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ,.
* -L'objet de ce rapport "évaluation des rejets" est de fournir : * d'une part des éléments d'appréciation, relatifs et/ou absolus, des principaux types de polluants parvenant aux milieux concernés. * d'autre part de proposer des ordres de grandeur pour instruire le chapitre "entrée" dans un bilan par paramètre, à l'échelle de l'Etang de Berre. * enfin, d'énoncer les lacunes qui subsistent et qui devront être comblées, tant dans les données disponibles (par source ou par paramètre) que dans les techniques d'évaluations indirectes.
Tipo: Text
Ano: 1985
URL: http://archimer.ifremer.fr/doc/00082/19308/16902.pdf

Dissolved inorganic carbon budgets in the eastern subpolar North Atlantic in the 2000s from in situ data
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Zunino, Patricia; Lherminier, Pascale; Mercier, Herle; Padin, Xose A.; Rios, Aida F.; Perez, Fiz F.
The subpolar North Atlantic (SPNA) is important in the global carbon cycle because of the deep water ventilation processes that lead to both high uptake of atmospheric CO2 and large inventories of anthropogenic CO2 (C-ant). Thus, it is crucial to understand its response to increasing anthropogenic pressures. In this work, the budgets of dissolved inorganic carbon (DIC), C-ant and natural DIC (DICnat) in the eastern SPNA in the 2000s, are jointly analyzed using in situ data. The DICnat budget is found to be in steady state, confirming a long-standing hypothesis from in situ data for the first time. The biological activity is driving the uptake of natural CO2 from the atmosphere. The C-ant increase in the ocean is solely responsible of the DIC storage rate...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00313/42419/41756.pdf

The diversity and dynamics of calanoida (copepoda) in the northern gulf of elat (aqaba), red-sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pradopor, Msd.
Tipo: Text
Ano: 1983
URL: http://archimer.ifremer.fr/doc/00113/22470/20151.pdf

Observations of open-ocean deep convection in the northwestern Mediterranean Sea: Seasonal and interannual variability of mixing and deep water masses for the 2007–2013 period
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Houpert, L.; Durrieu De Madron, X. Durrieu; Testor, P.; Bosse, A.; D'Ortenzio, F.; Bouin, M. N.; Dausse, D.; Le Goff, H.; Kunesch, S.; Labaste, M.; Coppola, L.; Mortier, L.; Raimbault, P.
We present here a unique oceanographic and meteorological dataset focus on the deep convection processes. Our results are essentially based on in situ data (mooring, research vessel, glider, and profiling float) collected from a multi-platform and integrated monitoring system (MOOSE: Mediterranean Ocean Observing System on Environment), which monitored continuously the northwestern Mediterranean Sea since 2007, and in particular high-frequency potential temperature, salinity and current measurements from the mooring LION located within the convection region.  From 2009 to 2013, the mixed layer depth reaches the seabed, at a depth of 2330m, in February. Then, the violent vertical mixing of the whole water column lasts between 9 and 12 days setting up the...
Tipo: Text
Palavras-chave: Physical oceanography; Ocean observations; Dense water formation; Open-ocean deep convection; Mixed layer; Gulf of lions; Deep water; Mediterranean Sea.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00355/46588/46400.pdf

Processing fish press waters using metallic and ceramic filtration
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Perez-galvez, Raul; Guadix, Emilia M.; Berge, Jean-pascal; Guadix, Antonio.
BACKGROUND  The press juices resulting from a compacting operation on fish by-products were subjected to a depuration treatment in order to reduce the high COD (120 g O2 L–1). The process included an initial de-particulation step by means of two metallic filter cartridges of 465 µm and 250 µm, followed by concentration with a 200 nm ultrafiltration ceramic membrane. The polishing efficiency of each unit was assessed in terms of COD and protein removal. RESULTS  Dead-end metallic filtration of the press waters reduced their suspended matter content by 28%, but achieved only 5.6% decrease in chemical oxygen demand (COD), which suggested further processing by membrane ultrafiltration. The de-particulated stream was then subjected to ultrafiltration for 8 h in...
Tipo: Text
Palavras-chave: Membranes; Waste-water; Bioseparations; Filtration.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00156/26701/24791.pdf

Gestion écosystémique de la pêche et de l’aquaculture. La gestion du thon rouge : histoire de la surexploitation et de son rétablissement
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fromentin, Jean-marc; Rouyer, Tristan.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00487/59824/62967.pdf

Résultats des campagnes scientifiques. Albert 1er de Monaco. Fascicule XI. Contribution à l'etude des Stellérides de l'Atlantique Nord (Golfe de Gascogne, Açores, Terre-Neuve)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Perrier, Edmond; Grimaldi, Albert 1er.
Le nombre des espèces d'Etoiles de mer recueillies durant les campagnes de I'HIRONDELLE s’élève à trente-cinq, réparties entre vingt-sept genres. Six de ces espèces sont nouvelles : une, le Pedicellaster parvulus, appartient a un genre depuis longtemps connu mais encore mal défini; une seconde, la Stolasterias neglecta, fait partie d'une coupe démembrée comme sous-genre des Asterias par Percy Sladen, mais que j'ai cru devoir élever au rang de genre en en modifiant un peu la caractéristique.
Tipo: Text
Ano: 1896
URL: http://archimer.ifremer.fr/doc/00090/20157/17809.pdf

Comprendre et inférer la connectivité marine pour mieux gérer les ressources
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bierne, Nicolas; Arnaud-haond, Sophie.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00487/59820/62963.pdf

Report on the ICES Working Group on Marine Shellfish culture (WGMASC), 7-9 April 2009, Bremerhaven, Germany
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kamermans, Pauline; Buck, Bela; Bodoy, Alain; Brenner, Mathias; Cranford, Peter; Fraser, David; Krause, Gesche; Van Nieuwenhove, Kris; Strand, Oivind.
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00041/15202/12529.pdf

A geostatistical method for assessing biomass of tuna aggregations around moored fish aggregating devices with star acoustic surveys
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Doray, Mathieu; Petitgas, Pierre; Josse, E.
Universal kriging was used to model the spatio-temporal variability in the acoustic density of tuna aggregations recorded during star echosounding surveys around moored fish aggregating devices (FADs) in Martinique (Lesser Antilles). The large-scale deterministic drift in the tuna spatial distribution was modeled using an advection-diffusion equation applied to animal grouping. Residuals from the drift were modeled as a random component with small-scale spatial correlation. An estimation variance formula was derived from this deterministic-statistical mixed model to assess the mean precision of density estimates of daytime tuna aggregation. The mean relative error obtained with our star design for daytime surveys was 24%. The methodology was applied to...
Tipo: Text
Palavras-chave: Acoustic survey precision; Advection diffusion model; Moored fish aggregating devices; Tuna; Geostatistics.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4559.pdf

Global trends in air-water CO2 exchange over seagrass meadows revealed by atmospheric Eddy Covariance
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Van Dam, Bryce; Polsenaere, Pierre; Barreras-apodaca, Aylin; Lopes, Christian; Sanchez-mejia, Zulia; Tokoro, Tatsuki; Kuwae, Tomohiro; Guttierrez Loza, Lucia; Rutgersson, Anna; Fourqueren, James; Thomas, Helmut.
Coastal vegetated habitats like seagrass meadows can mitigate anthropogenic carbon emissions by sequestering CO2 as “blue carbon” (BC). Already, some coastal ecosystems are actively managed to enhance BC storage, with associated BC stocks included in national greenhouse gas inventories. However, the extent to which BC burial fluxes are enhanced or counteracted by other carbon fluxes, especially air‐water CO2 flux (FCO2) remains poorly understood. In this study, we synthesized all available direct FCO2 measurements over seagrass meadows made using atmospheric Eddy Covariance, across a globally‐representative range of ecotypes. Of the four sites with seasonal data coverage, two were net CO2 sources, with average FCO2 equivalent to 44 ‐ 115% of the global...
Tipo: Text
Palavras-chave: Seagrass; Blue Carbon; CO2 Flux; Eddy Covariance; Carbon Cycle; Air‐sea interaction.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00682/79435/82041.pdf

Filets à Murex. Occitanie. 2017. Observation des Marées au débarquement - OBSDEB
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public. Ces indicateurs intègrent...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00596/70825/69058.pdf

Culture d'huîtres creuses en eaux profondes dans le Pertuis d'Antioche. Comparaisons avec les cultures sur estran du bassin de Marennes Oléron et de Fouras et les filières d'élevage des Saumonards. Période avril 2001 - février 2002
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Robert, Stephane; Le Moine, Olivier; Razet, Daniel; Geairon, Philippe; Guilpain, Patrice; Soletchnik, Patrick; Faury, Nicole; Seugnet, Jean-luc; Arnaud, Christophe; Chollet, Bruno; Chabirand, Jean-michel; Fleury, Pierre-gildas; Langlade, Aime; Goulletquer, Philippe; Mille, Dominique.
Le Bassin ostréicole de Marennes-Oléron, et globalement la Charente-Maritime, sont marqués depuis les années 80 (Héral, 1986), par un net recul des rendements de production qui engendrent une diminution de la rentabilité économique et un accroissement des coûts de production. La démonstration de la surcharge biologique du Bassin de Marennes-Oléron est faite depuis 1985. Cette situation a évolué depuis cette date, par une diminution des cheptels en  élevage et par une augmentation des cheptels sauvages ce qui a abouti à des plans d'entretien et de restructuration du DPM. Cependant, la situation défavorable pour la majorité des zones charentaises en terme de croissance-production est annuellement confirmée, depuis 1993 au moyen des réseaux de croissance...
Tipo: Text
Palavras-chave: Ostréiculture; Eaux profondes; Crassostrea gigas; Technique élevage; Croissance; Mortalité; Biométrie; Biochimie; Marennes Oléron.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00072/18369/15940.pdf

Characterization of the Secretomes of Two Vibrios Pathogenic to Mollusks
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Madec, Stephanie; Pichereau, Vianney; Jacq, Annick; Paillard, Mathieu; Boisset, Claire; Guerard, Fabienne; Paillard, Christine; Nicolas, Jean-louis.
Vibrio tapetis causes the brown ring disease in the Japanese clam Ruditapes philippinarum while Vibrio aestuarianus is associated with massive oyster mortalities. As extracellular proteins are often associated with the virulence of pathogenic bacteria, we undertook a proteomic approach to characterize the secretomes of both vibrios. The extracellular proteins (ECPs) of both species were fractionated by SEC-FPLC and in vitro assays were performed to measure the effects of each fraction on hemocyte cellular parameters (phagocytosis and adhesion). Fractions showing a significant effect were subjected to SDS-PAGE, and proteins were identified by nano LC-MS/MS. 45 proteins were identified for V. aestuarianus and 87 for V. tapetis. Most of them belonged to outer...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00242/35334/34576.pdf

Statistique des pêches maritimes - Année 1880
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Tipo: Text
Ano: 1881
URL: http://archimer.ifremer.fr/doc/00162/27308/25536.pdf

Catalogue descriptif des principaux organismes responsables d'eaux rouges
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lassus, Patrick.
Les phénomènes de coloration des eaux marines au voisinage des côtes, des estuaires, à l'intérieur des baies, lagunes ou ouvrages portuaires, sont connus depuis longtemps. Neanmoins, leur fréquence augmentant depuis quelques années sur le littoral français, des risques d'intoxications par ingestion de bivalves contaminés similaires à celles que connaissent régulièrement les Etats-Unis et le Canada, sont à craindre. De fait, si bon nombre de ces phénomènes "d'eaux rouges" restent sans effet après leur disparition, certains, par contre, peuvent entraîner des mortalités d'animaux marins, ou pire encore, de graves empoisonnements chez les consommateurs de "fruits de mer", du fait de l'énorme pouvoir concentrateur des bivalves.
Tipo: Text
Ano: 1980
URL: http://archimer.ifremer.fr/doc/00046/15774/13176.pdf

Campagne dédiée à l'évaluation des effets biologiques induits par la contamination chimique en baie de Seine. SELISEINE 2018
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mauffret, Aourell; Wessel, Nathalie; Roubeix, Vincent; Akcha, Farida; Chouvelon, Tiphaine; Aminot, Yann; Munschy, Catherine; Couteau, Jérôme; Briaudeau, Tifanie; Izagirre, Urtzi; Mahe, Kelig; Godfrin, Yoann; Pollono, Charles; Moisan, Karine; Olivier, Nathalie; Bely, Nadege; Bruzac, Sandrine; Crochet, Sylvette; Thomas, Bastien; Sireau, Teddy; Burgeot, Thierry.
Le dispositif « SELI » est mis en place depuis 2016 pour acquérir des données sur les effets biologiques intégrateurs de la contamination chimique chez des organismes marins (poissons et bivalves) et ainsi renseigner le critère 2 du descripteur 8 de la DCSMM (Le niveau de concentration des contaminants ne provoque pas d’effets dus à la pollution). Le présent rapport concerne le volet SELIseine. Des poissons plats (194 soles, flets et limandes) ont été prélevés en septembre 2018 sur le N/O Antéa, et des moules ont été prélevées en février 2019 sur 6 stations dans le cadre du suivi ROCCH MV suivant le protocole de la convention OSPAR (2012). Les biomarqueurs suivis chez ces organismes couvrent plusieurs types d’effets toxiques (reprotoxicité, génotoxicité,...
Tipo: Text
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00688/80024/83012.pdf

Propriétés statistiques de la température, salinité et turbidité mesurées par la station MAREL Carnot dans les eaux côtières de Boulogne-sur-Mer (France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kbaier-ben Ismail, Dhouha; Puillat, Ingrid; Lazure, Pascal.
Dans l’environnement marin, la température, la turbidité et la salinité sont des quantités importantes pour étudier l’écosystème. Beaucoup de champs montrent la haute variabilité pour une large gamme d'échelles spatiale et temporelle. Les séries temporelles sont souvent non-linéaires et non-stationnaires. Les auteurs considèrent ici les fluctuations du niveau de la mer, la salinité, la turbidité et la température enregistrés par le système MAREL Carnot de Boulogne-sur-Mer (France), qui est une bouée amarrée équipée d'appareils de mesure physicochimiques, qui fonctionnent dans des conditions continues et autonomes. Pour réaliser des analyses statistiques et spectrales adéquates, il est nécessaire de connaître la nature de la série temporelle considérée....
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00270/38076/36202.pdf

Culture d'huîtres creuses en eaux profondes dans le Pertuis d'Antioche - Comparaisons avec le site témoin de Fouras - Rapport préliminaire pour la période juillet 2000 - février 2001
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Robert, Stephane; Le Moine, Olivier; Razet, Daniel; Geairon, Philippe; Guilpain, Patrice; Soletchnik, Patrick; Faury, Nicole; Seugnet, Jean-luc; Arnaud, Christophe; Chollet, Bruno; Chabirand, Jean-michel; Fleury, Pierre-gildas; Bouget, Jean-francois; Goulletquer, Philippe.
Il est important de rappeler ici les informations concernant le Projet "Culture d'huîtres creuses en eaux profondes dans le Pertuis d'Antioche" (Goulletquer, 2000). Le Bassin de Marennes-Oléron, et globalement la Charente-Maritime, sont marqués depuis les années 80 (Héral, 1985), par un net recul des rendements de production qui engendrent une diminution de la rentabilité économique et un accroissement des coûts de production. La démonstration de la surcharge biologique du Bassin de Marennes-Oléron est démontrée depuis 1985. Cette situation a évolué depuis cette date, par une diminution des cheptels en élevage et par une augmentation des cheptels sauvages ce qui a abouti à des plans d'entretien et de restructuration du DPM. Cependant, la situation...
Tipo: Text
Palavras-chave: Ostréiculture; Eaux profondes; Crassostrea gigas; Technique élevage; Croissance; Mortalité; Pertuis Antioche.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00072/18370/15942.pdf

Surface ocean CO2 in 1990–2011 modelled using a feed-forward neural network
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Zeng, Jiye; Nojiri, Yukihiro; Nakaoka, Shin-ichiro; Nakajima, Hideaki; Shirai, Tomoko.
This dataset includes the monthly distributions of CO2 fugacity in the world surface oceans reconstructed using a feed-forward neural network model and the CO2 measurements of the Surface Ocean CO2 Atlas version 2.0. It has a spatial resolution of 1 9 1° and spans a period of 22 years, from January 1990 to December 2011. The dataset also includes necessary parameters for the reconstruction and an estimate of the CO2 fluxes between the ocean and the atmosphere. The aim of this work is to provide a dataset for estimating the oceans’ contribution to the global carbon budget.
Tipo: Text
Palavras-chave: Ocean; CO2; Neural network; Model.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00293/40400/38957.pdf

Mass Mortalities Affecting Populations of the Yellow Clam     Amarilladesma mactroides     Along Its Geographic Range
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vazquez, Nuria; Fiori, Sandra; Arzul, Isabelle; Carcedo, Cecilia; Cremonte, Florencia.
The yellow clam Amarilladesma mactroides (Deshayes, 1854) is considered a vulnerable species since the mid-1990s. Populations have experienced mass mortalities throughout their entire range of distribution (23–41°S) along exposed sandy beaches of Atlantic South America. Detrimental anthropogenic impacts have further contributed to failure of populations to make a recovery. To determine the factors involved in these events, density prior to a mortality event was calculated and live yellow clams encompassingmost of its geographic range distribution were analyzed histologically to describe parasites and pathologies. Moreover, moribund specimens were analyzed by molecular techniques to test for the presence of the virus OsHV-1. A mortality event was recorded...
Tipo: Text
Palavras-chave: Mass mortalities; Viral susceptibility; Amarilladesma mactroides; Pathologies.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00362/47283/47260.pdf

Application of a microbial source tracking based on bacterial and chemical markers in headwater and coastal catchments
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Jarde, Emilie; Jeanneau, Laurent; Harrault, Loic; Quenot, Emmanuelle; Solecki, Olivia; Petitjean, Patrice; Lozach, Solen; Cheve, Julien; Gourmelon, Michele.
This study identified sources of fecal contamination in three different French headwater and coastal catchments (the Justiçou, Pen an Traon, and La Fresnaye) using a combination of microbial source tracking tools. The tools included bacterial markers (three host-associated Bacteroidales) and chemical markers (six fecal stanols), which were monitored monthly over one or two years in addition to fecal indicator bacteria. 168 of the 240 freshwater and marine water samples had Escherichia coli (E. coli) or enterococci concentrations higher than “excellent” European water quality threshold. In the three catchments, the results suggested that the fecal contamination appeared to be primarily from an animal origin and particularly from a bovine origin in 52%...
Tipo: Text
Palavras-chave: Fecal contamination; Host-associated Bacteroidales markers; Fecal stanols; Rainfall; MST toolbox; Mitigation actions.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00395/50597/51548.pdf

Geomorphological classification in Bay of Biscay. Morpho-sedimentary mapping of the seabed in selected areas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: De Chambure, Laurent; Bourillet, Jean-francois; Bartel, Claire.
Les coraux d’eau froide, contrairement aux coraux tropicaux, n’ont pas besoin de lumière et peuvent se développer en profondeur. Les espèces constructrices comme Lophelia pertusa et Madrepora occulata ont une distribution mondiale et sont présentes de la Norvège à la Grèce sous forme de monts carbonatés ou de récifs. Menacés par l’évolution des conditions environnementales et les actions anthropiques, les coraux d’eau froide sont actuellement classés comme écosystème vulnérable par plusieurs institutions internationales. Dans les eaux européennes, les indicateurs pour mesurer l’impact des pêcheries et l’efficacité des mesures de protection manquent encore. Le projet européen CoralFish vise à étudier l’interaction entre les coraux, les poissons et les...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00249/36033/34570.pdf

L'aquaculture et les marchés : tendances, produits, opportunités
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lacroix, Denis; Paquotte, Philippe.
La rentabilité des entreprises aquacoles est déterminée par un ensemble de facteurs internes et externes, ce qui explique la diversité des modèles d'entreprises et de leurs implantations géographiques. Les facteurs externes sont à l'origine d'avantages comparatifs dont bénéficient les entreprises suivant les conditions économiques, institutionnelles ou environnementales. Ces avantages peuvent se traduire par des coûts de production moins élevés ou par de plus grandes facilités d'accès aux marchés. Etant donné la f01ie dépendance des entreprises aquacoles vis-à-vis du milieu, les questions d'appropriation de la ressource et de l'espace, en particulier sur une frange littorale très convoitée, et de protection de l'environnement face à l'impact de ces...
Tipo: Text
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00041/15180/12517.pdf

Accuracy assessment of ocean tide models around Antarctica
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: King, Ma; Padman, L.
Accurate ocean tide models for the circum-Antarctic seas are required to remove unwanted signals from floating ice elevation and space-borne, time-variable gravity measurements ( e. g., GRACE). We present accuracy assessments for several global ( CSR4, FES2004, FES99, GOT00.2, NAO. 99b, TPXO6.2) and Antarctic (CADA00.10 and CATS02.01) ocean tide models using coastal and pelagic tide gauges, gravimetric data and GPS records of ice shelf surface elevation. The accuracies of CSR4 and NAO. 99b are poor in the ice shelf regions. The optimum model for the entire circum-Antarctic seas is TPXO6.2, with a root-mean-square deviation of similar to 5 - 7 cm, similar to 40% lower than the next best model, FES2004. The main exception is the Filchner-Ronne Ice Shelf...
Tipo: Text
Ano: 2005
URL: https://archimer.ifremer.fr/doc/00232/34284/32657.pdf

Transcriptomic response to parasite infection in Nile tilapia (Oreochromis niloticus) depends on rearing density
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ellison, Amy R.; Uren Webster, Tamsyn M.; Rey, Olivier; Garcia De Leaniz, Carlos; Consuegra, Sofia; Orozco-terwengel, Pablo; Cable, Jo.
Background: Captive animal populations, be it for food production or conservation programmes, are often maintained at densities far beyond those in natural environments, which can have profound effects on behaviour, immune and stress levels, and ultimately welfare. How such alterations impact transcriptional responses to pathogen infection is a 'different kettle of fish' and remains poorly understood. Here, we assessed survival and gene expression profiles of infected fish reared at two different densities to elucidate potential functional genomic mechanisms for density-related differences in disease susceptibility. Results: Utilising a whole-transcriptome sequencing (RNAseq) approach, we demonstrate that rearing density in tilapia (Oreochromis niloticus)...
Tipo: Text
Palavras-chave: Stocking density; Stress; Saprolegnia; Aquaculture; Transcriptome; Tilapia; Circadian rhythm; Disease risk.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00462/57353/78952.pdf

Economics and biology used in fisheries research or when social and natural sciences try to depict together the object of their research
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Catanzano, Joseph; Mesnil, Benoit.
Fisheries can be characterized as a network of interactions between natural and social systems, and thus should be viewed as complex, dynamic systems. Due to the multiplicity of components and processes, the involvement of various disciplines is required to understand the inter-relationships within and between the systems, and more so to adequately address management issues that typically affect several elements in the systems. To be successful, multidisciplinary approaches require mutual understanding of the perspectives, concepts, vocabulary and methods held by various disciplines, and agreement on the objects to be studied in common. In that spirit, at framework is suggested whereby fisheries systems are decomposed into related sub-systems that can be...
Tipo: Text
Palavras-chave: Système halieutique; Systèmes naturels et sociaux; Multidisciplinarité; Gestion des pêcheries; Risque; Production; Incertitude.; FISHERIES SYSTEM; NATURAL AND SOCIAL SYSTEMS; MULTIDISCIPLINARY APPROACHES; FISHERIES MANAGEMENT; RISK; PRODUCTION; UNCERTAINTY.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00179/29033/27467.pdf

The Nme gene family in fish
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Desvignes, T.; Fostier, A.; Fauvel, Christian; Bobe, J.
The Nme gene family, also known as Nm23 or NDPK, is a very ancient gene family that can be found in all kingdoms of life. In the late eighties, a gene of the Nme family, NME1, was identified as the first metastatic suppressor gene, resulting in a major interest for this family. Due to the complexity of the family, the need for a unified and evolutionary-supported gene nomenclature was recently stressed by the scientific community. Based on a complete evolutionary history study of the gene family in metazoans and vertebrates, a unified nomenclature was recently proposed and accepted by gene nomenclature consortia. In addition to its well-documented role in tumor metastasis, members of the Nme family are also involved in a wide variety of cellular and...
Tipo: Text
Palavras-chave: Nm23; NDPK; RP2; Teleost; Oocyte; Ovary.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00133/24466/22504.pdf

Bacillariales et Dinophycees de la partie sud-occidentale du bassin oriental de la Mediterranee.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Borgne-david, A. Le.
20 samples of phytoplankton were collected by the 'Thalassa' on the Libyan and east Tunisian coast, from Nov 13th to 29th 1969. The vegetal plankton is rather poor on the whole, except in the Gulf of Gabes. Diatoms are dominant and Rhizosolenia plays a leading part. Among the Dinophyceae, the great variety of Ceratium underlines the subtropical affinities of the study area.
Tipo: Text
Palavras-chave: MED; Tunisia MED; Libya; Arab. Rep Ceratium Rhizosolenia Marine ecology Phytoplankton.
Ano: 1975
URL: http://archimer.ifremer.fr/doc/1975/publication-2018.pdf

Occurrence of priority and emerging organic compounds in fishes from the Rhone River (France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Miege, Cécile; Peretti, A.; Labadie, P.; Budzinski, Helene; Le Bizec, B.; Vorkamp, K.; Tronczynski, Jacek; Persat, H.; Coquery,; Babut, M.
The main objective of this study was to collect new data on the occurrence, levels of priority and emerging organic compounds in freshwater fish sampled in the Rhone River. The 34 studied contaminants included alkylphenols, bisphenol A, polybromodiphenylethers (PBDE), perfluorinated compounds, hexabromocyclododecanes (HBCD), hexachlorobenzene and hexachlorobutadiene (HCBD). About 50 fish samples (individual specimens or pooled fish) were collected from three sites located upstream and downstream of the Lyon metropolitan area in the Rhone River (France). Four species were caught at each site, namely: the barbel (Barbus barbus), the common bream (Abramis brama), the white bream (Blicca bjoerkna) and the chub (Squalius cephalus). Some contaminants were...
Tipo: Text
Palavras-chave: Emerging compounds; Priority compounds; Fishes; River waters; Contamination level.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00109/22043/19802.pdf

Use of rotavirus virus-like particles as surrogates to evaluate virus persistence in shellfish
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Loisy, Fabienne; Atmar, R; Le Saux, Jean-claude; Cohen, J; Caprais, Marie-paule; Pommepuy, Monique; Le Guyader, Soizick.
Rotavirus virus-like particles (VLPs) and MS2 bacteriophages were bioaccumulated in bivalve mollusks to evaluate viral persistence in shellfish during depuration and relaying under natural conditions. Using this nonpathogenic surrogate virus, we were able to demonstrate that about 1 log(10) of VLPs was depurated after 1 week in warm seawater (22 degrees C). Phage MS2 was depurated more rapidly (about 2 log(10) in 1 week) than were VLPs, as determined using a single-compartment model and linear regression analysis. After being relayed in the estuary under the influence of the tides, VLPs were detected in oysters for up to 82 days following seeding with high levels of VLPs (concentration range between 10(10) and 10(9) particles per g of pancreatic tissue)...
Tipo: Text
Palavras-chave: Seawater; Viral diseases; Bioaccumulation; Depuration; Contamination; Model; Pancreas; Regression analysis; Shellfish; Phages; Virus.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-1233.pdf

Observations sur la dynamique des sables de la Pierre Noire (baie de Morlaix, Finistère, France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Auffret, Gérard-andré; Douville, Jean-luc.
The "Pierre Noire" accumulation (20 m depth) is mostly made up of biogenic sands. The bathymetric map as well as some seismic profiles show an irregular morphology in relation with the paleozoic basement. Fourty grab samples were collected within a regular grid. The particle size distributions show that the local variability is low. They allow also to distinguish two fractions characterized by particles of different nature. Long term bottom current measurements show a westward residual component. [NOT CONTROLLED OCR]
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1974
URL: http://archimer.ifremer.fr/doc/1974/publication-5432.pdf

Transient dynamics of a 2D granular pile
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mutabaruka, Patrick; Kumar, Krishna; Soga, Kenichi; Radjai, Farhang; Delenne, Jean-yves.
We investigate by means of Contact Dynamics simulations the transient dynamics of a 2D granular pile set into motion by applying shear velocity during a short time interval to all particles. The spreading dynamics is directly controlled by the input energy whereas in recent studies of column collapse the dynamics scales with the initial potential energy of the column. As in column collapse, we observe a power-law dependence of the runout distance with respect to the input energy with nontrivial exponents. This suggests that the power-law behavior is a generic feature of granular dynamics, and the values of the exponents reflect the distribution of kinetic energy inside the material. We observe two regimes with different values of the exponents: the...
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00685/79685/82468.pdf

Workshop on identification of future emerging technologies in the ocean energy sector. 27th March 2018 Ispra, Italy
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Magagna, D; Margheritini, L; Alessi, A; Bannon, E; Boelman, E; Bould, D; Coy, V; De Marchi, E; Frigaard, P; Guedes Soares, C; Golightly, C; Hals Todalshaug, J; Heward, M; Hofmann, M; Holmes, B; Johnstone, C; Kamizuru, Y; Lewis, T; Macadre, Lm; Maisondieu, Christophe; Martini, M; Moro, A; Nielsen, K; Reis, V; Robertson, S; Schild, P; Soede, M; Taylor, N; Viola, I; Wallet, N; Wadbled, X; Yeats, B.
As part of the European Commission's internal Low Carbon Energy Observatory (LCEO) project, the Joint Research Centre (JRC) is developing an inventory of Future Emerging Technologies (FET) relevant to energy supply. A key part of the LCEO initiative is the consultation of external experts, addressing both those with in-depth experience in specific fields and those with a broad perspective on relevant science and engineering aspects. In this context, on March 27, 2018 the JRC organised a Workshop on Identification of Future Emerging Technologies for Ocean Energy, on it premises in Ispra. The workshop was organised on the idea of a colloquium between international experts to discuss about future emerging technologies considering different aspects such as...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00468/58016/60412.pdf

Effects of pressure ridge sheltering on the spatial and temporal variability of boundary layer stability under first year sea ice
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hudier, E; Ingram, G.
We present series of data describing the small-scale structure of the boundary layer stratification in the vicinity and away from a 1.5 m pressure ridge keel. We then analyze the influence of pressure ridges on the spatial and temporal variability of the ocean boundary layer Our experiment was done during the melt in order to use small-scale salinity gradients to study the variability in intensity of mixing processes. High-resolution salinity records sampled at 0+, 25 and 50 cm from the ice-water interface were analyzed at two stations, one at 5 m and the other at 75 m from a pressure ridge keel. We observed that, in the immediate vicinity of the ridge, melting is associated with the periodic development and dissipation of a melt layer in relation with the...
Tipo: Text
Palavras-chave: Glace; Rugosité; Couche limite; Diffusion turbulente; Ice; Roughness; Boundary layer; Eddy diffusivity.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00325/43598/43981.pdf

Spatial, Ecological and Social Dimensions of Assessments for Bivalve Farming Management
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bacher, Cedric; Gangnery, Aline; Cugier, Philippe; Mongruel, Remi; Strand, Oivind; Frangoudes, Katia.
The general purpose of assessment is to provide decision-makers with the best valuable data, information, and predictions with which management decisions will be supported. Using case studies taken from four scientific projects and dealing with the management of marine bivalve resources, lessons learned allowed identifying some issues regarding assessment approaches. The selected projects also introduced methodological or institutional frameworks: ecosystem approach to aquaculture (EAA), system approach framework (SAF), marine spatial planning (MSP), and valuation of ecosystem services (ES). The study on ecosystem services linked ES to marine habitats and identified ES availability and vulnerability to pressures. The results were displayed as maps of...
Tipo: Text
Palavras-chave: Ecosystem services; Marine spatial planning; Ecosystem approach to aquaculture; System approach; Modeling; Stakeholder involvement.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00470/58138/60608.pdf

The control of the Southern Hemisphere Westerlies on the position of the Subtropical Front
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: De Boer, Agatha M.; Graham, Robert M.; Thomas, Matthew; Kohfeld, Karen E.
In recent years the latitudinal position of the Subtropical Front (STF) has emerged as a key parameter in the global climate. A poleward positioned front is thought to allow a greater salt flux from the Indian to the Atlantic Ocean and so drive a stronger Atlantic Meridional Overturning Circulation. Here the common view that the STF aligns with the zero wind stress curl (WSC) is challenged. Based on the STF climatologies of Orsi et al. (1995), Belkin and Gordon (1996), Graham and De Boer (2013), and on satellite scatterometry winds, we find that the zero WSC contour lies on average approximate to 10 degrees, approximate to 8 degrees, and approximate to 5 degrees poleward of the front for the three climatologies, respectively. The circulation in the region...
Tipo: Text
Palavras-chave: Subtropical Front; Wind stress curl; Southern Ocean; Satellite data; Fronts; Dynamical Subtropical Front.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00169/28046/26248.pdf

Improved correction for non-photochemical quenching of in situ chlorophyll fluorescence based on a synchronous irradiance profile
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Xing, Xiaogang; Briggs, Nathan; Boss, Emmanuel; Claustre, Herve.
In situ chlorophyll fluorometers have been used to quantify the distribution of chlorophyll concentration in natural waters for decades. However, chlorophyll fluorescence is depressed during daylight hours due to non-photochemical quenching (NPQ). Corrections attempted to date have provided improvement but still remain unsatisfactory, often over-estimating the expected value. In this study. we examine the relationship between NPQ and instantaneous Photosynthetically Active Radiation (iPAR) using field data from BGC-Argo floats equipped with Chlorophyll-alpha fluorometers and radiometers. This analysis leads to an improved NPQ correction that incorporates both iPAR and mixed layer depth (MLD) and is validated against data collected at sunrise or sunset. The...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00640/75204/75335.pdf

Grands invertébrés et poissons observés par les campagnes scientifiques. Atlas de distribution. Bilan 2008
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Trenkel, Verena; Berthele, Olivier; Lorance, Pascal; Bertrand, Jacques; Brind'Amour, Anik; Cochard, Marie-laure; Coppin, Franck; Leaute, Jean-pierre; Mahe, Jean-claude; Morin, Jocelyne; Rochet, Marie-joelle; Salaun, Michele; Souplet, Arnauld; Verin, Yves.
Depuis une vingtaine d'années, l'Ifremer organise des campagnes de pêche scientifique en mer du Nord, Manche, Atlantique et Méditerranée concernant les ressources pélagiques, démersales et benthiques. L'objectif prioritaire est de produire des indices d'abondance des principales espèces commerciales. Elles recueillent également des données sur les espèces capturées non commerciales.  Les campagnes sont réalisées selon des plans d'échantillonnage standardisés. L'engin de pêche et son gréement, la position des stations, le tri des captures, les prélèvements biologiques suivent des protocoles fixés. Chaque zone étudiée est découpée en fonction de la profondeur, de la latitude ou d'autres critères. L'échantillonnage prévoit un nombre de traits de chalut...
Tipo: Text
Palavras-chave: Populations; Halieutique; Bulletin; Méditerranée; Golfe de Gascogne; Manche; Mer du Nord; France; Pêche; Campagnes à la mer; Atlas; Survey; Mediterranean Sea; Bay of Biscay; English Channel; North Sea; France; Populations; Fishery science; Bulletin; Atlas.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/rapport-6976.pdf

Comparison of 240 ka long organic carbon and carbonate records along a depth transect in the Timor Sea: Primary signals versus preservation changes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Liu, Wei; Baudin, Francois; Moreno, Eva; Dewilde, Fabien; Caillon, Nicolas; Fang, Nianqiao; Bassinot, Franck.
Total organic carbon (TOC) and calcium carbonate (CaCO3) records from different water depths in the Timor Sea (NE Indian Ocean) are compared in order to better reconstruct past changes in pelagic productivity, highlight the impact of preservation at depth, and unravel the interplay of organic carbon and carbonate sedimentation. New data are presented for core MD01-2376 located at 2376 m depth. These results are compared, over the last 240 ka, with published data on two neighboring cores (MD01-2378, 1783 m and MD98-2166, 3875 m). TOC fluctuations show strong glacial/interglacial variations and Milankovitch-type oscillations (i.e., dominant frequencies centered on the 100, 41, and 23 ka bands), with an enrichment during cold periods that reflects an increase...
Tipo: Text
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00290/40149/39258.pdf

Links between tropical rainfall and North Atlantic climate during the last glacial period
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Deplazes, Gaudenz; Lueckge, Andreas; Peterson, Larry C.; Timmermann, Axel; Hamann, Yvonne; Hughen, Konrad A.; Roehl, Ursula; Laj, Carlo; Cane, Mark A.; Sigman, Daniel M.; Haug, Gerald H.
During the last glacial period, the North Atlantic region experienced pronounced, millennial-scale alternations between cold, stadial conditions and milder interstadial conditions-commonly referred to as Dansgaard-Oeschger oscillations-as well as periods of massive iceberg discharge known as Heinrich events(1). Changes in Northern Hemisphere temperature, as recorded in Greenland(2-4), are thought to have affected the location of the Atlantic intertropical convergence zone(5,6) and the strength of the Indian summer monsoon(7,8). Here we use high-resolution records of sediment colour-a measure of terrigenous versus biogenic content-from the Cariaco Basin off the coast of Venezuela and the Arabian Sea to assess teleconnections with the North Atlantic climate...
Tipo: Text
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00264/37556/35774.pdf

Résultats de la Surveillance de la Qualité du Milieu Marin Littoral. Départements : Ille-et-Vilaine et Côtes d'Armor. Edition 2004
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer.
Tipo: Text
Ano: 2004
URL: http://archimer.ifremer.fr/doc/00316/42744/42122.pdf

Contribution à l'étude de la qualité bactériologique de la zone mytilicole du Lazaret (La Seyne-Sur-Mer)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Talbot, Vincent; Molina, Christine; Bianchi, Micheline.
Tipo: Text
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00131/24266/22264.pdf

PREVIMER: Downscaling from MyOcean regional scale to coastal scale
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pineau-guillou, Lucia; Dumas, Franck; Petton, Sebastien; Garreau, Pierre; Herbert, Gaelle; Charria, Guillaume; Le Traon, Pierre-yves; Debreu, Laurent.
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00214/32496/30976.pdf

New Insights into the Ecology and Physiology of Methanomassiliicoccales from Terrestrial and Aquatic Environments
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cozannet, Marc; Borrel, Guillaume; Roussel, Erwan; Moalic, Yann; Allioux, Maxime; Sanvoisin, Amandine; Toffin, Laurent; Alain, Karine.
Members of the archaeal order Methanomassiliicoccales are methanogens mainly associated with animal digestive tracts. However, environmental members remain poorly characterized as no representatives not associated with a host have been cultivated so far. In this study, metabarcoding screening combined with quantitative PCR analyses on a collection of diverse non-host-associated environmental samples revealed that Methanomassiliicoccales were very scarce in most terrestrial and aquatic ecosystems. Relative abundance of Methanomassiliicoccales and substrates/products of methanogenesis were monitored during incubation of environmental slurries. A sediment slurry enriched in Methanomassiliicoccales was obtained from a freshwater sample. It allowed the...
Tipo: Text
Palavras-chave: Methanomassiliicoccales; Cultivation; Methyl-compounds; Environmental cluster; Networks.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00665/77716/79808.pdf

Etude spatiale des données collectées à bord des navires de pêche : en quoi est-elle pertinentes pour la gestion des rejets en mer ?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pointin, Fabien.
Since 2002, the European Union (EU) Members States collect, manage and supply data for the management of fisheries and specifically of discards. In this context, at-sea observer programmes collect data on-board fishing vessels on the composition and quantity of catch, including discards. Based on these data, this study aims to analyse the spatio-temporal distribution of landings and discards so as to contribute to their management. In doing so, a mapping method based on nested grids has been developed. This method has been designed to produce pluriannual, annual and quarterly maps of landings and discards per species or group of species according to the fishing métier. A platform based on Big Data technologies has then been used with the objectives of...
Tipo: Text
Palavras-chave: Rejet; Programme d’observation à la mer; Grille à mailles variables; Big Data; Obligation de débarquement; Incitations Economiques; Discards; On-board observer programme; Nested Grid; Big Data; Landing Obligation.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00472/58415/60978.pdf

Cytotoxicity, Fractionation and Dereplication of Extracts of the Dinoflagellate Vulcanodinium rugosum, a Producer of Pinnatoxin G
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Geiger, Marie; Desanglois, Gwenaelle; Hogeveen, Kevin; Fessard, Valerie; Lepretre, Thomas; Mondeguer, Florence; Guitton, Yann; Herve, Fabienne; Sechet, Veronique; Grovel, Olivier; Pouchus, Yves-francois; Hess, Philipp.
Pinnatoxin G (PnTX-G) is a marine toxin belonging to the class of cyclic imines and produced by the dinoflagellate Vulcanodinium rugosum. In spite of its strong toxicity to mice, leading to the classification of pinnatoxins into the class of “fast-acting toxins”, its hazard for human health has never been demonstrated. In this study, crude extracts of V. rugosum exhibited significant cytotoxicity against Neuro2A and KB cells. IC50 values of 0.38 µg mL−1 and 0.19 µg mL−1 were estimated on Neuro2A cells after only 24 h of incubation and on KB cells after 72 h of incubation, respectively. In the case of Caco-2 cells 48 h after exposure, the crude extract of V. rugosum induced cell cycle arrest accompanied by a dramatic increase in double strand DNA breaks,...
Tipo: Text
Palavras-chave: Dereplication; Cyclic imine; HRMS; Bioactivity; Pinnatoxins.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00156/26723/24802.pdf

Des otolithes aux satellites: méthodes et applications du traitement du signal et des images pour l'observation de l'océan
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fablet, Ronan.
This document presents a synthesis of my research activities over the last 10 years initially within the Ifremer-IRD schlerochronology laboratory and the Fisheries Science and Technology department at Ifremer, and then at the Signal &amp; Communication Department of Telecom Bretagne. My research activities were undertaken at the interface of Information Science and Technology and Oceanography. In the framework of interdisciplinary approaches, my research work addressed the development of new image and signal processing tools and methods with a view to (1) providing new representations of the obsvered scenes or processes, (2) exploiting these representations to infer or reconstruct patterns of interest for the considered thematic objectives. Three thematic...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00079/19015/16596.pdf

Complex small pelagic fish population patterns arising from individual behavioral responses to their environment
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Brochier, Timothee; Auger, Pierre-amael; Pecquerie, Laure; Machu, Eric; Capet, Xavier; Thiaw, Modou; Mbaye, Baye Cheikh; Braham, Cheikh-baye; Ettahiri, Omar; Charouki, Najib; Sene, Ousseynou Ndaw; Werner, Francisco; Brehmer, Patrice.
Small pelagic fish (SPF) species are heavily exploited in eastern boundary upwelling systems (EBUS) as their transformation products are increasingly used in the world food chain. Management relies on regular monitoring, but there is a lack of robust theories for the emergence of the populations’ traits and their evolution in highly variable environments. This work aims to address existing knowledge gaps by combining physical and biogeochemical modelling with an individual life-cycle based model applied to round sardinella (Sardinella aurita) off northwest Africa, a key species for regional food security. Our approach focused on the processes responsible for seasonal migrations, spatio-temporal size-structure, and interannual biomass fluctuations....
Tipo: Text
Palavras-chave: Small pelagic fish; Sardinella aurita; Fish migration; Eastern boundary upwelling system; Individual based biophysical models; Dynamic energy budget.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00433/54433/56088.pdf

Atmospheric CO2 concentration from 60 to 20 kyr BP from the Taylor Dome ice core, Antarctica
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Indermuhle, A; Monnin, E; Stauffer, B; Stocker, Tf; Wahlen, M.
A high-resolution record of the atmospheric CO2 concentration from 60 to 20 thousand years before present (kyr BP) based on measurements on the ice core of Taylor Dome, Antarctica is presented. This record shows four distinct peaks of 20 parts per million by volume (ppmv) on a millennial time scale. Good correlation of the CO2 record with temperature reconstructions based on stable isotope measurements on the Vostok ice core (Antarctica) is found.
Tipo: Text
Ano: 2000
URL: https://archimer.ifremer.fr/doc/00220/33137/31644.pdf

Demise of a submarine canyon? Evidence for highstand infilling on the Waipaoa River continental margin, New Zealand
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Walsh, J. P.; Alexander, C. R.; Gerber, T.; Orpin, A. R.; Sumners, B. W.
Submarine canyons are major geomorphologic features on the Earth's surface. Their formation has received considerable debate, but their demise has received less attention. Research of modern canyons with cores and moorings has documented active sediment transport and deposition, but extrapolation of these local observations over larger areas is precluded by complex canyon geomorphology. High-resolution multibeam and chirp data presented here provide convincing evidence of an infilling canyon head on the Waipaoa River margin of New Zealand. Tens of meters of Holocene sediment have accumulated on the outer shelf and in Lachlan canyon as a result of off-shelf sediment transport. Regardless of the ultimate fate of this system over geological time scales, this...
Tipo: Text
Palavras-chave: Canyon; Infilling; Waipaoa.
Ano: 2007
URL: https://archimer.ifremer.fr/doc/00238/34924/33260.pdf

3-D crustal density model of the Sea of Marmara
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gholamrezaie, Ershad; Scheck-wenderoth, Magdalena; Bott, Judith; Heidbach, Oliver; Strecker, Manfred R.
The Sea of Marmara, in northwestern Turkey, is a transition zone where the dextral North Anatolian Fault zone (NAFZ) propagates westward from the Anatolian Plate to the Aegean Sea Plate. The area is of interest in the context of seismic hazard of Istanbul, a metropolitan area with about 15 million inhabitants. Geophysical observations indicate that the crust is heterogeneous beneath the Marmara basin, but a detailed characterization of the crustal heterogeneities is still missing. To assess if and how crustal heterogeneities are related to the NAFZ segmentation below the Sea of Marmara, we develop new crustal-scale 3-D density models which integrate geological and seismological data and that are additionally constrained by 3-D gravity modeling. For the...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00502/61386/65056.pdf

Archaeal communities associated with shallow to deep subseafloor sediments of the New Caledonia Basin
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Roussel, Erwan; Sauvadet, Anne-laure; Chaduteau, Carine; Fouquet, Yves; Charlou, Jean-luc; Prieur, Daniel; Cambon, Marie-anne.
P&gt;The distribution of the archaeal communities in deep subseafloor sediments [0-36 m below the seafloor (mbsf)] from the New Caledonia and Fairway Basins was investigated using DNA- and RNA-derived 16S rRNA clone libraries, functional genes and denaturing gradient gel electrophoresis (DGGE). A new method, Co-Migration DGGE (CM-DGGE), was developed to access selectively the active archaeal diversity. Prokaryotic cell abundances at the open-ocean sites were on average similar to 3.5 times lower than at a site under terrestrial influence. The sediment surface archaeal community (0-1.5 mbsf) was characterized by active Marine Group 1 (MG-1) Archaea that co-occurred with ammonia monooxygenase gene (amoA) sequences affiliated to a group of uncultured...
Tipo: Text
Palavras-chave: Marine subsurface sediments; Sea floor biosphere; Gradient gel electrophoresis; Microbial communities; Molecular diversity; Anaerobic oxidation; Sequence alignment; Phylogenetic trees; Extracellular DNA; Methane hydrate.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6801.pdf

Comparing the role of absolute sea-level rise and vertical tectonic motions in coastal flooding, Torres Islands (Vanuatu)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ballu, Valerie; Bouin, Marie-noelle; Simeoni, Patricia; Crawford, Wayne C.; Calmant, Stephane; Bore, Jean-michel; Kanas, Tony; Pelletier, Bernard.
Since the late 1990s, rising sea levels around the Torres Islands (north Vanuatu, southwest Pacific) have caused strong local and international concern. In 2002-2004, a village was displaced due to increasing sea incursions, and in 2005 a United Nations Environment Programme press release referred to the displaced village as perhaps the world's first climate change "refugees." We show here that vertical motions of the Torres Islands themselves dominate the apparent sea-level rise observed on the islands. From 1997 to 2009, the absolute sea level rose by 150 +/- 20 mm. But GPS data reveal that the islands subsided by 117 +/- 30 mm over the same time period, almost doubling the apparent gradual sea-level rise. Moreover, large earthquakes that occurred just...
Tipo: Text
Palavras-chave: Geodesy; Seismic cycle; Island arcs; Vertical motion.
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00144/25575/23734.pdf

Synthèse 2017 de l’observation des efforts et débarquements des pêcheries côtières. Estimation des efforts de pêche et des productions dans les régions Méditerranée continentale, La Réunion, Martinique, Guadeloupe et Guyane pour les navires de moins de 12m.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Weiss, Jerome; Demaneche, Sebastien; Evano, Hugues; Guyader, Olivier; Bourjea, Jerome; Derridj, Olivier; Reynal, Lionel; Mansuy, Emmanuel; Berthou, Patrick; Leonardi, Sophie; Rostiaux, Emilie; Leblond, Emilie; Le Blond, Samuel.
Le programme d’observation des marées au débarquement, appelé « ObsDEB », contribue à l’estimation de l’effort de pêche et des captures des flottes de pêche françaises. Il vise tout particulièrement les flottilles de petite pêche côtière et procède à la collecte des informations requises selon un plan d’échantillonnage adapté à chaque région suivie. Ce rapport est le Rapport annuel de Convention DPMA-Ifremer 2017 et présente les estimations 2017 des efforts de pêche et des productions dans les régions Méditerranée continentale, La Réunion, Martinique, Guadeloupe et Guyane.
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00478/58970/61577.pdf

Hétérogénéité et fusion partielle du manteau. Une étude de la dorsale Pacifique-Antarctique et de la ride de Hollister (Pacifique Sud)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vlastelic, Ivan.
The Pacific-Antarctic Ridge (PAR) between 56 and 66°S is far removed from any hotspot influence. The small geochemical variations observed along the ridge can be interpreted as being the result of cold edge effect caused by fracture zones. This effect seems to increase during the morphological transition from valley to dome, leading to an increase of trace element variability. The ridge morphological transition is not controlled by the mantle temperature.
Tipo: Text
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00034/14506/11846.pdf

Long-Term Monitoring of Green Turtle Nesting on Tromelin Island Demonstrates Stable Reproduction and Population Parameters
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Derville, Solene; Jean, Claire; Dalleau, Mayeul; Le Gal, Jean-yves; Ciccione, Stephane; Bourjea, Jerome.
Situated about 500 km off the Malagasy east coast, the island of Tromelin is a key nesting site for the endangered green turtle, Chelonia mydas, in the south Western Indian Ocean. Nesting turtles found in this isolated island have been closely monitored since the 1970s, but the most recent estimates of nesting parameters date from 1986. Using mark-recapture data, track counts, and nests monitoring data collected over the 2009/2010 nesting peak, reproductive characteristics, population size, and offspring production were updated and discussed in the light of the track survey undertaken from 1986 to 2010. Females showed a consistent reproductive behaviour compared with previous studies in terms of clutch frequency (2.75 +/- 1.46) and nesting success (0.65)....
Tipo: Text
Palavras-chave: Reptilia Testudines: Cheloniidae Chelonia mydas; Green turtle nesting activity population assessment Indian Ocean Tromelin Island.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00273/38424/36794.pdf

Bioactive Compounds Produced by Pseudoalteromonas Affect Marine Biofilm Formation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Klein, Geraldine; Soum-soutera, Emmanuelle; Bazire, Alexis; Dreanno, Catherine; Compere, Chantal; Dufour, Alain.
Bacterial biofilms, frequently in association with algae, protozoa and fungi, are found on all submerged structures in the marine environment. Biofilms are responsible for a range of surface‐associated and diffusible signals, which may moderate the settling behaviour of cells, spores and larvae. Thus, marine microorganisms are a new source of bioactive compounds, which enhance or inhibit the settlement of organisms.
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00089/20005/17667.pdf

The littoral semi-diurnal tidal wave in the gulf of biscay
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hyacinthe, Jean-louis.
At the same time as the technological developement of a new deep-sea tide gauge, taking advantage from the work of Eyries [I], scientific studies on the off-shore tides are carried at the Oceanographic Center of Brest.  First of all, we made a rapid survey on tide at the limit of the littoral part of the Gulf of Biscay. The positions of the six stations on the bathymetric line of 200 meters are given by the fig. I.  The current measurements were made by Aanderaa currentmeters and those regarding the variation of the sea level by a prototype of the french tide gauge using a differential manometer with vibrating strings.  The measurements lasted for about two days. During this period, the semi-diurnal tide is represented by the M2 component of a period T? =...
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1974
URL: http://archimer.ifremer.fr/doc/1974/publication-5113.pdf

Biomasse, production et dynamique des populations de Nereis diversicolor (annélide polychète) de l'estuaire de la Loire (France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gillet, P.
Tipo: Text
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00131/24255/22248.pdf

Adaptabilité des activités conchylicoles aux modifications de leur environnement : Scénarii et solutions. Le cas du bassin de Marennes-Oléron
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mille, Dominique; Le Moine, Olivier.
Ce travail a été réalisé dans le cadre du programme européen ANCORIM (Atlantic Network For Costal Risks Management) dont la durée est de 3 ans (mai 2009 à avril 2012) et qui est cofinancé par l'Union Européenne dans le cadre du programme INTERREG IV B espace atlantique « Investir dans notre avenir commun ». L'objectif d'ANCORIM est de promouvoir les outils destinés à renforcer les capacités d'action des décideurs du littoral des régions atlantiques afin de faire face aux risques littoraux en matière d'érosion côtière, de submersion ou d'atteinte à la qualité des eaux. L'action privilégie le renforcement des échanges et des connaissances en créant un outil d'échange à l'usage des décideurs. Elle prend la forme d'une intensification des relations entre la...
Tipo: Text
Palavras-chave: Activités conchylicoles; Modèles de production conchylicoles; Recensement des risques côtiers; Méthodologie; Modélisation; Bassin de Marennes Oléron.
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00061/17257/14766.pdf

Impact of technological creep on fishing effort and fishing mortality, for a selection of European fleets
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Marchal, Paul; Andersen, Bo; Caillart, B.; Eigaard, Ole; Guyader, Olivier; Hovgaard, Holger; Iriondo, Ane; Le Fur, Fanny; Sacchi, Jacques; Santurtun, Marina.
Face-to-face interviews were conducted to identify the main changes in gear and vessel technology that may have improved the fishing efficiency of a number of French, Danish, and Basque fleets over the past few decades. Important changes include the gradual appearance of twin trawls (Danish and French trawlers) and trammel-nets (French gillnetters), and the increased polyvalence of Basque bottom trawlers. The results suggest that fishing effort descriptors that are not traditionally measured (gear type, groundrope type, length of net used per day, headline length, crew size, number of winch or net drums) may have a substantial impact on catch rates. Adjusting fishing effort using such descriptors may generally improve the relationship between fishing...
Tipo: Text
Palavras-chave: Twin trawls; Technological creep; Groundrope; Generalized linear models; Fishing mortality; Fishing effort; Catch rate.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2611.pdf

Sensory and aromatic characteristics of tongue sole by-products hydrolysates (Cynoglossus senegalensis)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sylla, K. S. B.; Berge, Jean-pascal; Prost, Carole; Musabyemariya, B.; Seydi, Mg.
Tongue sole by-products coming from fish-filleting plant were hydrolyzed by Protamex® protease. To identify the future application of hydrolysates, a sensory analysis was carried out.The sensory profile was performed with a jury of 14 specialized judges.11 profiles were found by this panel of tasting. In addition, the aromatic characterization revealed that 57 molecules are responsible for these odours described in sensory analysis.The description of these aromatic compounds opens potential way of valorization of these hydrolysates in human and animal consumption.
Tipo: Text
Palavras-chave: Hydrolyse enzymatique; Co-produits; Arôme; Enzymatic hydrolysis; By-products; Aroma.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00003/11428/7976.pdf

Coûts liés à la dégradation des ressources halieutiques. Sous-région marine Golfe de Gascogne. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guyader, Olivier; Jacob, Céline.
Tipo: Text
Palavras-chave: Golfe de Gascogne; Ressources halieutiques; Dégradation; Evaluation des coûts.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00330/44102/43673.pdf

Selection and application of methods for the detection and enumeration of human-pathogenic halophilic vibrio spp. in seafood: guidance. Microbiological risk assessment series, 22
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: FAO/WHO.
One of the challenges in undertaking global risk assessments for halophilic Vibrio spp. has been the availability of appropriate datasets from around the world. Such datasets need to be representative of the range of conditions under which halophilic Vibrio spp. grow and become a problem for seafood safety. Even when data are available, the different methodology used to generate that data often make it difficult to compare and consolidate globally representative datasets.  This document is intended to provide guidance to inform the selection of the most appropriate methods to generate data on Vibrio spp. in seafood. It considers the range of potential methods from culture based to molecular, and proposes the use of performance characteristics to select the...
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00368/47873/47871.pdf

VarEff. Variation of Effective size. Software VAREFF (package R in file.zip) and the documentation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Nikolic, Natacha; Chevalet, Claude.
This package estimates the effective sizes from actual to ancestral time with a coalescent approach. It works on steps of constant size to resolve the probabilities by an approximation of maximum likelihood from a Bayesian posterior distribution. This package works with R software version 3.0.2 or later for VAREFF version 1.1 and R software version 2.10.0 or later for VAREFF version 1.0.  This new version contains a new function TMRCA to estimate the time of the detected bottleneck.
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00177/28781/27262.pdf

Observation of swell dissipation across oceans
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ardhuin, Fabrice; Chapron, Bertrand; Collard, Fabrice.
Global observations of ocean swell, from satellite Synthetic Aperture Radar data, are used to estimate the dissipation of swell energy for a number of storms. Swells can be very persistent with energy e-folding scales exceeding 20,000 km. For increasing swell steepness this scale shrinks systematically, down to 2800 km for the steepest observed swells, revealing a significant loss of swell energy. This value corresponds to a normalized energy decay in time beta = 4.2 x 10(-6) s(-1). Many processes may be responsible for this dissipation. The increase of dissipation rate in dissipation with swell steepness is interpreted as a laminar to turbulent transition of the boundary layer, with a threshold Reynolds number of the order of 100,000. These observations...
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6452.pdf

Étude sédimentologique et méiobenthos d'un écosystème lagunaire modifié par un récif artificiel à vocation aquacole : l'acadja
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guiral, D; Gourbault, N; Helleouet, Mn.
In developing countries, recourse to extensive aquaculture systems based on the exploitation of natural aquatic food webs is currently the subject of considerable interest. In this connection, the construction of artificial reefs (known as Acadja) for the development on substrates of living communities, and the utilization of this new production to enhance fish growth have been evaluated in Cote d'Ivoire. This paper describes the granulometric, chemical and biological transformation of the sedimentary ecosystem as a consequence of this practice. In the artificial habitat, an increase in the sedimentation rate of the mineral fraction (definitive trapping of particle resuspension generated by the waves and induced by the wind) and of the organic fraction...
Tipo: Text
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00097/20796/18421.pdf

The ocean mixed layer under Southern Ocean sea-ice: Seasonal cycle and forcing
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pellichero, Violaine; Sallee, Jean-baptiste; Schmidtko, Sunke; Roquet, Fabien; Charrassin, Jean-benoit.
The oceanic mixed layer is the gateway for the exchanges between the atmosphere and the ocean; in this layer, all hydrographic ocean properties are set for months to millennia. A vast area of the Southern Ocean is seasonally capped by sea-ice, which alters the characteristics of the ocean mixed layer. The interaction between the ocean mixed layer and sea-ice plays a key role for water mass transformation, the carbon cycle, sea-ice dynamics, and ultimately for the climate as a whole. However, the structure and characteristics of the under-ice mixed layer are poorly understood due to the sparseness of in situ observations and measurements. In this study, we combine distinct sources of observations to overcome this lack in our understanding of the polar...
Tipo: Text
Palavras-chave: Southern Ocean; Mixed layer; Sea-ice; Elephant seals; Salt budget; Heat budget.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00383/49400/49901.pdf

VACUMM - A Python Library for Ocean Science
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Raynaud, Stephane; Charria, Guillaume; Wilkins, Jonathan; Garnier, Valerie; Garreau, Pierre; Theetten, Sebastien.
VACUMM is an open-source Python library for processing data from observations and numerical models. The library is now used for several years in research and operational contexts, for instance for producing fi gures and reports, validating models, converting data, or making simple or advanced diagnostics. In this paper, we introduce how the library is built, and we present two applications of its use: one in an operational context and one in a research context.
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00197/30784/29142.pdf

Répartition bathymétrique des espèces dites profondes.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lorance, Pascal.
Cette note présente une revue des distributions bathymétriques connues des espèces profondes du projet de règlement des pêcheries profondes.
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00111/22178/19844.pdf

Sedimentological imprint on subseafloor microbial communities in Western Mediterranean Sea Quaternary sediments
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ciobanu, Maria Cristina; Rabineau, Marina; Droz, Laurence; Revillon, Sidonie; Ghiglione, J. -f.; Dennielou, Bernard; Jorry, Stephan; Kallmeyer, J.; Etoubleau, Joel; Pignet, Patricia; Crassous, Philippe; Vandenabeele-trambouze, Odile; Laugier, J.; Guegan, Matthieu; Godfroy, Anne; Alain, Karine.
An interdisciplinary study was conducted to evaluate the relationship between geological and paleoenvironmental parameters and the bacterial and archaeal community structure of two contrasting subseafloor sites in the Western Mediterranean Sea (Ligurian Sea and Gulf of Lion). Both depositional environments in this area are well-documented from paleoclimatic and paleooceanographic point of views. Available data sets allowed us to calibrate the investigated cores with reference and dated cores previously collected in the same area, and notably correlated to Quaternary climate variations. DNA-based fingerprints showed that the archaeal diversity was composed by one group, Miscellaneous Crenarchaeotic Group (MCG), within the Gulf of Lion sediments and of nine...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00090/20171/17826.pdf

Maigre commun
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Biais, Gerard.
Tipo: Text
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00444/55573/57186.pdf

Online collaborative environment to run Stock Assessment work ow: an option for IOTC?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Imzilen, Taha; Bonhommeau, Sylvain; Rouyer, Tristan; Kell, Laurence T; Chassot, Emmanuel; Barde, Julien.
In this note, we present an approach which has been recently used to execute online the set of codes used for eastern blue_n tuna (BFT-E) stock assessment at ICCAT. We aim at discussing the possible interest of the approach to the IOTC Community for focusing on Indian ocean tuna and tuna-like stocks and running other assesment models such as Stock Synthesis 3 (SS3). In 2014, ICCAT BFT-E working group has been able to execute thousands of model runs by using parallelization of R and Fortran codes on a supercomputer. This approach has a lot of scienti_c bene_ts, in particular for better including the multiple sources of uncertainty in assessment results and associated scienti_c advice. However, very few participants would be able to reproduce it without...
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00360/47135/47084.pdf

Suivi des masses d'eaux cotières en Manche - Mer du Nord par flotteurs argos (Campagnes FLOTANOR) - Evaluation du devenir potentiel des produits de dragages portuaires après immersion en mer
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Arnal, Olivier.
Le Programme Régional Integré de l'Environnement Nord Pas de Calais (convention Région-IFREMER) a permis de dresser un constat de la Qualite du milieu marin naturel (3), et préciser la nature et l'importance des apports à la mer. Des situations de contaminations, se traduisant par des teneurs élevées de certains polluants dans les sédiments du littoral régional, ont été identifiées et localisées. Ces secteurs sont les sites officiels prévus pour les rejets de produits de dragages portuaires, "au large", et en bordure cotière près des ports et des estuaires. Les teneurs les plus élevées en polluants métalliques sont trouvées les secteurs Boulogne - cap Gris Nez et Calais Dunkerque. L'emplacement de ces zones suggère que les rejets de dragages portuaires...
Tipo: Text
Ano: 1988
URL: http://archimer.ifremer.fr/doc/00081/19218/16813.pdf

Qualité du Milieu Marin Littoral. Bulletin de la surveillance. Edition 2008. Départements : Loire-Atlantique et Vendée.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer.
Dans le cadre du Système national d'Information sur l'Eau, mis en place par le Ministère de l'Ecologie et du Développement Durable, l’Institut national de recherche marine (Ifremer) opère de façon coordonnée à l'échelle du littoral français trois programmes nationaux de surveillance : le réseau de contrôle microbiologique (REMI), le réseau de surveillance du phytoplancton et des phycotoxines (REPHY), le Réseau d'Observation de la Contamination Chimique (RNO). Le suivi des phycotoxines dans les coquillages réalisé par le REPHY est sous maîtrise d'ouvrage du Ministère de l'Agriculture et de la Pêche. Sous l’impulsion de la Directive européenne Cadre sur l'Eau (DCE), le réseau de surveillance benthique (REBENT) est en voie d’extension nationale.
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00319/42978/42634.pdf

Evaluation de la qualité des zones de production conchylicole. Département du Finistère. Edition 2017
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boulben, Sylviane.
Après un rappel des objectifs, du fonctionnement et de la méthode d’interprétation des résultats du réseau de contrôle microbiologique REMI, ce rapport inclut un bilan national et décrit le programme annuel du département du Finistère. Il présente l’ensemble des résultats obtenus, en particulier l’estimation de la qualité des zones de production de coquillages classées et l’évolution de leur qualité. Pour quelques zones, le classement en vigueur est discordant avec l’estimation de la qualité. En décembre 2016, l’arrêté préfectoral portant classement sanitaire des zones de production de coquillages vivants dans le Finistère a été révisé et a permis le classement de quatre zones B en A.
Tipo: Text
Palavras-chave: REMI; E. coli; Contamination bactériologique des coquillages; Classement sanitaire des zones de production conchylicole; Département du Finistère.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00393/50403/51117.pdf

Microbiota Composition and Evenness Predict Survival Rate of Oysters Confronted to Pacific Oyster Mortality Syndrome
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Clerissi, Camille; De Lorgeril, Julien; Petton, Bruno; Lucasson, Aude; Escoubas, Jean Michel; Gueguen, Yannick; Dégremont, Lionel; Mitta, Guillaume; Toulza, Eve.
Pacific Oyster Mortality Syndrome (POMS) affects Crassostrea gigas oysters worldwide and causes important economic losses. Disease dynamic was recently deciphered and revealed a multiple and progressive infection caused by the Ostreid herpesvirus OsHV-1 μVar, triggering an immunosuppression followed by microbiota destabilization and bacteraemia by opportunistic bacterial pathogens. However, it remains unknown if microbiota might participate to protect oysters against POMS, and if microbiota characteristics might be predictive of oyster mortalities. To tackle this issue, we transferred full-sib progenies of resistant and susceptible oyster families from hatchery to the field during a period in favor of POMS. After 5 days of transplantation, oysters from...
Tipo: Text
Palavras-chave: Holobiont; Microbiome; Metabarcoding; Fitness; Bacteria.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00621/73332/72500.pdf

Etude écologique préalable à l'extension du port de St Quay Portrieux
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Monbet, Yves.
La Nunicipalité de la Cormnune de St-Quay-Portrieux envisage la réalisation d'une extension du port actuel. Ce projet se justifie car le département des Côtes-du-Nord est sous-équipé dans le domaine de la plaisance et ne compte, en effet, que 3, 3 % des bateaux de plaisance français et 16,3 % des plaisanciers immatriculés en Bretagne. De plus, en baie de St-Brieuc, la moitié seulement des bateaux peut trouver un abri dans un port ou dans un mouillage organisé. Il apparaît donc nécessaire de réaliser des équipements permettant d'accueillir à la fois des bateaux de plaisance et des bateaux de pêche. L'étude présentée ici est destinée à mettre en évidence les éventuelles incidences de la construction de ce port, sur la faune et la flore du site retenu et ses...
Tipo: Text
Ano: 1980
URL: http://archimer.ifremer.fr/doc/00105/21632/19212.pdf

Avis de l'Ifremer à propos du dossier "loi sur l'eau" pour l'actualisation de l'arrêté préfectoral du système d'assainissement de Matignon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cheve, Julien; Rollet, Claire.
Tipo: Text
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00243/35446/80731.pdf

Les coraux de mer profonde nuisibles aux chalutiers
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Joubin, M. L.
L'accroissement considérable du tonnage et de la puissance des navires de pêche employés par les armateurs français leur a permis de manœuvrer les chaluts à des profondeurs de plus en plus grandes qu'ils n'atteignaient jamais, il n’y a pas un bien grand nombre d'années. En opérant dans ces couches profondes ils ont rencontré, à partir de 200 mètres environ, des coraux ramifiés qui sont localisés dans ces eaux plus froides et plus obscures. Ces coraux sont constitués par du calcaire extrêmement dur, à consistance et aspect de porcelaine, à cassure blanche et coupante ; les chaluts déchirent et peuvent même y rester accrochés ; le moindre mal qui leur arrive est de se remplir de branches cassées qui les empêchent de fonctionner. Le chalut de la Tanche en a...
Tipo: Text
Palavras-chave: Chart; North Atlantic; Coral; Fishing net; Obstacle; Fisheries.
Ano: 1922
URL: http://archimer.ifremer.fr/doc/1922/publication-2394.pdf

Elements sur le comportement experimental et numerique de la structure d'un voilier de 7m70 en cours de navigation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Baley, C; Cailler, M.
The experimental sailing boat "Mesure Z," has been designed and built on behalf of F.I.N., (the French marine industry association). This research project has been managed in close collaboration with Bureau Veritas, Ifremer and the CEA. The GRP hull is similar to that of a production sailing boat, but it has been designed as a transducer-hull, i.e. a hull sufficiently sensitive to allow measurements (hull strains, acceleration, spar loads, etc), due to its structure and mechanical characteristics. This paper presents different aspects of the experimental boat, the materials and structure of the transducer-hull, and the behaviour of the central and bow regions of the hull during sailing.
Tipo: Text
Palavras-chave: Finite element method; Navigation; Measurement; Boating; Sailing ships; Mechanical properties; Ship technology; Composite materials; Navigation; Comportement mécanique; Eléments finis; Mesure; Matériau composite; Voilier.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-1073.pdf

Observations sur l'effet des pollutions en milieu saumâtre dans le canal de Sète au Rhône
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fauvel, Yves; Battista, J.
La portion du canal de Sète au Rhône qui fait l'objet de cette étude, se situe dans sa partie occidentale, dénommée "canal des étangs". Elle s'étend sur une dizaine de kilomètres environ, de l'est de l'agglomération de Frontignan à l'étang de Thau (fig. 1).  Ce canal atteint dans cette région une largeur moyenne de 15 m et une profondeur n'excédant pas 3 m. Il traverse, parallèlement à la côte languedocienne, un ensemble de nappes d'eau de faible épaisseur avec lesquelles il communique par d'étroits chenaux. Ce complexe lagunaire forme l'étang d'Ingril. Cet étang et plus particulièrement sa partie située au nord-est de Frontignan a déjà attiré notre attention par l'apparition d'un phénomène bactérien "d'eaux rouges" qui s'y est développé en juin 1965. Ce...
Tipo: Text
Ano: 1969
URL: http://archimer.ifremer.fr/doc/1969/publication-7289.pdf

Modifications somatiques et adatations d'Escherichia coli en milieu marin
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Munro, Patrick.
Tipo: Text
Ano: 1988
URL: http://archimer.ifremer.fr/doc/00132/24358/22358.pdf

Use of multielement stable isotope ratios to investigate ontogenetic movements of Micropogonias furnieri in a tropical Brazilian estuary
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pizzochero, Ana Carolina; Michel, Loic; Chenery, Simon R.; Mccarthy, Ian D.; Vianna, Marcelo; Malm, Olaf; Lepoint, Gilles; Das, Krishna; Dorneles, Paulo R.
The whitemouth croaker, Micropogonias furnieri, is a long-lived fish of high commercial importance in the Western Atlantic Ocean. Here, we used stable isotope ratios of carbon, sulfur and nitrogen and isotopic niche metrics (SIBER) to study feeding habits and track habitat use by whitemouth croakers in Guanabara Bay, an estuary in Rio de Janeiro state, Brazil. Our results highlighted size-related habitat segregation, with small juvenile (&lt; 30 cm) fishes residing mostly inside estuaries, while large adult (&gt; 60 cm) fishes feed mainly in Continental Shelf (CS) waters. Medium adult fishes (30-60 cm) appear to feed in multiple coastal and CS habitats. Moreover, their feeding ecology showed strong temporal differences, linked with seasonal and, to a...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00408/51985/52644.pdf

Quartier maritime Dzaoudzi. 2018. Activité des navires de pêche.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d’Informations Halieutiques » (SIH) de l’Ifremer, qui constitue le réseau d’observation des ressources halieutiques et des usages associés. Ce projet s’inscrit dans la mission de service d’intérêt public de l’Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l’analyse du secteur des pêches, le SIH a en charge l’élaboration d’indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche et du grand public.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00608/72044/70748.pdf

Abrupt shoaling of the nutricline in response to massive freshwater flooding at the onset of the last interglacial sapropel event
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Grelaud, Michael; Marino, Gianluca; Ziveri, Patrizia; Rohling, Eelco J.
A detailed assessment of the respective roles of production, export, and subsequent preservation of organic carbon (C-org) in the eastern Mediterranean (EMED) sediments during the formation of sapropels remains elusive. Here we present new micropaleontological results for both surface samples taken at several locations in the EMED and last interglacial sapropel S5 from core LC21 in the southeastern Aegean Sea. A strong exponential anticorrelation between relative abundances of the lower photic zone coccolithophore Florisphaera profunda in the surface sediments and modern concentrations of chlorophyll a (Chl-a) at the sea surface suggests that F. profunda percentages can be used to track past productivity changes in the EMED. Prior to S5 deposition, an...
Tipo: Text
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00265/37632/36756.pdf

S'acclimater à des salinités et températures changeantes : un focus sur la branchie chez le loup européen Dicentrarchus labrax
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Masroor, Waliullah.
The European sea bass Dicentrarchus labrax undertakes seasonal migrations to estuaries and lagoons that are characterized by fluctuations in environmental conditions. It is unclear to what extent salinity acclimation mechanisms are affected at temperatures higher than in the sea, as usually encountered in transitional waters in spring and summer. In this study, juvenile sea bass were pre-acclimated to seawater (SW) at 18 °C (temperate) or 24 °C (warm) for two weeks and then transferred to either fresh water (FW) or SW at the considered temperatures. We have shown that sea bass are able to efficiently maintain blood osmolality at 24 °C at both salinities. However, temperature increase induced significant changes regarding several physiological traits...
Tipo: Text
Palavras-chave: Salinité; Poisson téléostéen; Écophysiologie; Branchies; Transport ionique; Salinity; Ecophysiology; Teleost fish; Temperature; Gills; Ion transport.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00500/61175/64661.pdf

Qualité du Milieu Marin Littoral. Bulletin de la surveillance. Edition 2009. Département : Finistère
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer.
Dans le cadre du Système national d'Information sur l'Eau, mis en place par le Ministère de l'Ecologie et du Développement Durable, l’Institut national de recherche marine (Ifremer) opère de façon coordonnée à l'échelle du littoral français trois programmes nationaux de surveillance : le réseau de contrôle microbiologique (REMI), le réseau de surveillance du phytoplancton et des phycotoxines (REPHY), le Réseau d'Observation de la Contamination Chimique (RNO). Le suivi des phycotoxines dans les coquillages réalisé par le REPHY est sous maîtrise d'ouvrage du Ministère de l'Agriculture et de la Pêche. Sous l’impulsion de la Directive européenne Cadre sur l'Eau (DCE), le réseau de surveillance benthique (REBENT) est en voie d’extension nationale.
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00316/42711/42087.pdf

Sperm features of captive Atlantic bluefin tuna (Thunnus thynnus)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Suquet, Marc; Cosson, J.; De La Gandara, F.; Mylonas, C. C.; Papadaki, M.; Lallemant, S.; Fauvel, Christian.
P&gt;The present study aimed to establish some basic characteristics of Atlantic bluefin tuna sperm from captive mature males, treated or untreated by gonadotropin releasing hormones agonist (GnRHa). Intratesticular milt was collected from treated and untreated fish (mean weight +/- SD: 122.9 +/- 29.2 kg, n = 21). There was no significant effect of GnRHa treatment on GSI (1.33 +/- 0.70%, n = 21) or on sperm concentration (3.8 +/- 1.3 x 1010 spermatozoa ml-1, n = 21) estimated by optical density at 260 nm. Similarly, the percentage of motile spermatozoa measured at 30 s post activation: activating medium (AM seawater containing 10 mg ml-1 BSA) was not significantly different between control and GnRHa implanted males. On the other hand, a significantly...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00015/12645/9722.pdf

Estimation des échanges entre la mer et la lagune de Biguglia : Utilisation de la méthode d’estimation des volumes d’eau échangés entre la mer et les lagunes par différence de hauteurs d’eau.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tunin-ley, Alina; Malet, Nathalie; Fiandrino, Annie; Orsoni, Valerie; Baldi, Yoann.
Le projet a pour objectif premier de disposer d'un modèle hydrodynamique opérationnel (modèle MARS) sur la lagune de Biguglia et de le valider sur la base de paramètres mesurés in situ (hauteurs d'eau, salinité, température, débits échangés avec la mer). Cela permettra ensuite de caractériser le fonctionnement physique de la lagune à l'aide de descripteurs hydrodynamiques (influence relative des différents forçages, temps de résidences...) puis d'en dégager une typologie saisonnière.  Cette étude préliminaire a pour but d’estimer les volumes journaliers entrants et sortants à partir des données de hauteurs d’eau de part et d’autre des graus. Cette étude a été menée sur la lagune de Biguglia grâce à la méthode développée au LER-LR sur différents étangs du...
Tipo: Text
Palavras-chave: Echanges mer/lagune; Hauteur d’eau; Grau; Hydrodynamique; Biguglia (lagune Corse).
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00214/32525/31011.pdf

Trophic ecology of coastal soft bottoms: a dive into the stew of marine sediment
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Charles, F.; Nozais, C.; Lantoine, F.; Rzeznik-orignac, J.; Labrune, C.; Coston-guarini, J.
Using stable isotope analyses, the present study looked at the fractionation of carbon and nitrogen isotopes between bulk sediment organic matter, particulates from the water column, and benthic consumers from the Northwestern Mediterranean continental shelf. Results showed that sedimentary organic matter in the area under study mainly consisted of phytoplankton detritus. In contrast to their available food source, consumers varied widely both in delta C-13 and delta N-15. Meiofauna fed selectively freshly settled organic particles and channeled energy and matter toward the next upper trophic level. Subsurface primary consumers that feed on less readily digestible sediment organic fractions showed enrichments in rare heavier isotopes as high as those of...
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00616/72858/72998.pdf

Contribution thématique DCSMM évaluation de l'état initial "pression et impact" - pression "Abrasion" dans la sous-région marine golfe de Gascogne DCSMM/EI/MMN
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lorance, Pascal.
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00054/16493/14005.pdf

125000 ans d'enregistrements récifaux des stagnations du niveau de la mer dans l'Océan Indien (Archipel des Glorieuses)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Jorry, Stephan; Jouet, Gwenael; Le Roy, Pascal; Prat, Sophie; Camoin, Gilbert; Vella, Claude; Caline, Bruno.
Suite à l’initiation du programme REEFCORES (REEFs and CORals form the EparseS), deux missions menées en 2011 et en 2013 dans l’Archipel des Glorieuses (Nord Madagascar) ont permis de documenter les empreintes des épisodes de déglaciation dans la morphologie des terrasses récifales émergées et submergées. L’objectif principal de cette étude est d’abord de documenter les stagnations du niveau marin qui ont été engendrées au cours de la dernière remontée du niveau marin et sur les terrasses du dernier interglaciaire (MIS 5e). Cette zone située autour des Seychelles, du fait de sa stabilité (isostasie très faible), est idéalement placée pour reconstituer avec précision les variations globales du niveau marin (Milne and Mitrovica, 2008). Des données de...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00202/31279/29686.pdf

Identification et description d'Eponges de différents types d'écosystèmes benthiques. Rapport d'étude des échantillons
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Carteron, Sophie; Boury-esnault, Nicole; Vacelet, Jean.
Contribuer à l'inventaire de la biodiversité marine benthique au niveau de I'Océan mondial et à la description du compartiment biologique des écosystèmes benthiques dans le but d'en comprendre le fonctionnement.
Tipo: Text
Palavras-chave: Eponge; Ecosystème benthique; Spongiaire.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/00432/54324/55654.pdf

Working Group on Comparative Analyses between European Atlantic and Mediterranean marine ecosystems to move towards an Ecosystem-based Approach to Fisheries (WGCOMEDA).
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ICES.
The ICES Working Group on comparative analyses between European Atlantic and Mediterranean Ecosystems to move towards an Ecosystem-based Approach to Fisheries (WGCOMEDA) recently completed its second three-year cycle. WGCOMEDA was established in 2014 and works in cooperation with other groups within the ICES Integrated Ecosystem Assessments Steering Group (IEASG). The working group objectives are: i) to set the analytical and data framework to develop common Integrated Ecosystem Assessments (IEA) exercises, ii) to advance several ongoing comparative studies on ecosystems stability, and iii) to frame comparative size- and traits-based approaches in both demersal and benthic ecosystems. To fulfil these objectives, the group focused on: 1. Providing a more...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00513/62435/66727.pdf

TEMPO: a new ecological module for studying deep-sea community dynamics at hydrothermal vents
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sarrazin, Jozee; Blandin, Jerome; Delauney, Laurent; Dentrecolas, Stephane; Dorval, Philippe; Dupont, Jacky; Legrand, Julien; Leroux, D.; Leon, Pierre; Leveque, Jean-jacques; Rodier, Philippe; Vuillemin, Renaud; Sarradin, Pierre-marie.
The major goal of this project, elaborated in the frame of the STREP Exocet/D European project, was to design a first autonomous long-term imaging module equipped with a deep-sea video camera, adequate lightning and sufficient energy storage while taking advantage of most recent progress in imaging and photonics. The new ecological module TEMPO was tested and deployed during the Momareto cruise held from August 6 to September 6, 2006 on the new French oceanographic vessel Pourquoi pas?, with the ROV Victor 6000. The scientific objectives of the Momareto cruise were to study the spatial and temporal dynamics of hydrothermal communities colonizing the MoMAR zone, located on the Azores Triple Junction.
Tipo: Text
Palavras-chave: Community dynamics; Deep-sea; Imagery; Monitoring.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3597.pdf

Filets soulevés. Provence-Alpes-Côte d'Azur. 2017. Observation des Marées au débarquement - OBSDEB
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public. Ces indicateurs intègrent...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00597/70879/69112.pdf

Development of a polymerase chain reaction for the detection of abalone herpesvirus infection based on the DNA polymerase gene
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chen, M.h.; Kuo, S. T.; Renault, Tristan; Friedman, C. S.; Chang, P. H.
A 5781-base pair (bp) fragment of genomic DNA from the Taiwanese abalone herpesvirus was obtained and showed 99% (5767/5779) homology in the nucleotide sequence and 99% (1923/1926) in the amino acid sequence with the DNA polymerase gene of the abalone herpesvirus strain Victoria/AUS/2007. Homology of the amino acid sequence with the DNA polymerase of ostreid herpesvirus 1 was 30% (563/1856). In this study, a PCR-based procedure for detecting herpesvirus infection of abalone, Haliotis diversicolor supertexta, in Taiwan was developed. The method employed primer sets targeting the viral DNA polymerase gene, and was able to amplify DNA fragments of the expected size from infected samples. Primer sets of 40f and 146r were designed for amplification of an...
Tipo: Text
Palavras-chave: Herpes virus; Abalone; Haliotis diversicolor supertexta; DNA polymerase; Polymerase chain reaction.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00098/20952/19675.pdf

Effet d'un sédiment marin sur le développement embryonnaire de mollusques bivalves : Optimisation du protocole expérimental et traitement des résultats
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hoch, Thierry.
Biological test allow to measure the global effect of a presumed polluted solution. They are of great importance in the control of the marine medium quality. described experiences, made on bivalve molluscs, are concerning sediment, which accummulates a lot of toxicants. In corder to obtain quickly precise test results, an optimization of the experimental protocol isproposed. The particular data treatment is then taken up and an analyse of the results of the year is detailed. This analyse brings out the interest of the performed test as well as the orientations to take and the eventual modifications to bring in the future.
Tipo: Text
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00040/15116/12452.pdf

Assessing the internal consistency of the CARINA data base in the Pacific sector of the Southern Ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sabine, C. L.; Hoppema, M.; Key, R. M.; Tilbrook, B.; Van Heuven, S.; Lo Monaco, C.; Metzl, N.; Ishii, M.; Murata, A.; Musielewicz, S.
The CARINA project is aimed at gathering and providing secondary quality control checks on carbon and carbon-relevant hydrographic and geochemical data from cruises all across the Atlantic, Arctic and Southern Ocean. In total the project gathered 188 cruises that were not previously available to the public. Of these 188 cruises, 37 are part of the Southern Ocean. Parameters from the Southern Ocean cruises, including total carbon dioxide (TCO2), total alkalinity, oxygen, nitrate, phosphate and silicate, were examined for cruise-to-cruise consistency. pH and chlorofluorocarbons (CFCs) are also part of the data base, but are not discussed here. This paper focuses on the quality control of the Southern Ocean data from the Pacific sector which consisted of 29...
Tipo: Text
Ano: 2009
URL: https://archimer.ifremer.fr/doc/00293/40433/38987.pdf

Biodiversity offset markets: What are they really? An empirical approach to wetland mitigation banking
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vaissiere, Anne-charlotte; Levrel, Harold.
Tipo: Text
Palavras-chave: Biodiversity offset; Market; Hybrid form; Mitigation banking; Wetlands.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00248/35884/34682.pdf

Metrics for describing dyadic movement: a review
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Joo, Rocio; Etienne, Marie-pierre; Bez, Nicolas; Mahevas, Stephanie.
In movement ecology, the few works that have taken collective behaviour into account are data-driven and rely on simplistic theoretical assumptions, relying in metrics that may or may not be measuring what is intended. In the present paper, we focus on pairwise joint-movement behaviour, where individuals move together during at least a segment of their path. We investigate the adequacy of twelve metrics introduced in previous works for assessing joint movement by analysing their theoretical properties and confronting them with contrasting case scenarios. Two criteria are taken into account for review of those metrics: 1) practical use, and 2) dependence on parameters and underlying assumptions. When analysing the similarities between the metrics as...
Tipo: Text
Palavras-chave: Collective behaviour; Dyadic movement; Indices; Movement ecology; Spatio-temporal dynamics; Trajectories.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00475/58657/61156.pdf

Manuel de l'observateur en criées et sur les lieux de débarquement
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: DPMA; CNPMEM; IFREMER.
Ce manuel détaille les missions d’observation dans les criées et sur les lieux de débarquement et se veut un guide opérationnel pour l’observateur sur le terrain. Il décrit les tâches à réaliser et les résultats attendus.
Tipo: Text
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00681/79337/81849.pdf

Qualification des données acquises par la station de mesure MOLIT en baie de Vilaine entre février et octobre 2017
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Retho, Michael.
Ce rapport présente les éléments qui ont conduit à la qualification des données acquises en 2017 par la station de mesure haute fréquence MOLIT (Mer Ouverte Littoral). La bouée MOLIT est déployée depuis 2008 en baie de Vilaine, une des zones de la côte atlantique les plus menacées par l’eutrophisation. Cette bouée instrumentée constitue un des systèmes de mesure du réseau de mesure haute fréquence Ifremer HOSEA (High frequency Observation network for the environment in coastal SEAs). Elle fait également partie du réseau COAST-HF (Coastal OceAn observing SysTem – High Frequency). Cette station est équipée d’une sonde multiparamètres qui mesure les paramètres température, salinité, oxygène dissous, turbidité et fluorescence. Les mesures sont effectuées à...
Tipo: Text
Palavras-chave: MOLIT; Bouée instrumentée; Haute fréquence; Baie de Vilaine; Qualification; Température; Salinité; Oxygène dissous; Turbidité; Fluorescence.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00441/55218/56693.pdf

Inshore fisheries and governance (France). The case of the commercially harvested mussel fishery of eastern Cotentin (Lower Normandy). Study report. GIFS Project. Action 1
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Picault, David; Lesueur, Marie; Noel, Julien; Lepetit, Audrey; Nys, Cecile; Pellan, Cécile; Trougan, Mélissa; Rezgani, Wafa; Souidi, Safa.
This report is part of the GIFS Project Activity 1 "Governance of coastal zones and maritime fisheries", the objectives of which are: *To understand the different modes of coastal governance of the study area and identify management practices. *To inventory and understand the approaches and existing management frameworks throughout the study area, as well as to identify the place held by maritime fishing in the latter.
Tipo: Text
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00500/61202/64748.pdf

Palangres calées à Poissons démersaux. La Réunion. 2019. Observation des Marées au débarquement - OBSDEB
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public. Ces indicateurs intègrent...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00647/75864/76860.pdf

Etude sanitaire de la zone 50.04 « Utah Beach – Quinéville » - groupes 2 et 3 (coquillages bivalves fouisseurs et non fouisseurs)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rocq, Sophie.
Suite à la demande des pêcheurs professionnels de pouvoir exploiter les coques (coquillages bivalves fouisseurs) dans la zone 50.04 « Utah Beach – Quinéville », la Direction Départementale des Territoires et de la Mer a demandé la réalisation d’une étude sanitaire en vue du classement de la zone de production pour ce groupe de coquillages. Une étude de dossier et une inspection du littoral ont été réalisées afin de recenser les principales sources de contamination microbiologique et d’évaluer leurs impacts sur la zone étudiée. Ce travail a suggéré que le risque de contamination microbiologique était dispersé tout au long du littoral étudié. Trois points de prélèvement de coques (répartis dans le secteur où se trouve le gisement) ont été échantillonnés deux...
Tipo: Text
Palavras-chave: Escherichia coli; Étude sanitaire; Manche; Classement sanitaire; Contamination bactériologique des coquillages; Coques; Moules; Fouisseurs; Non fouisseurs; Utah Beach.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00664/77651/79685.pdf

Hydrological changes in the Mediterranean Sea over the last 30,000 years
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Essallami, L.; Sicre, M. A.; Kallel, N.; Labeyrie, L.; Siani, G.
Sea surface temperatures were reconstructed over the last 30,000 years from alkenone paleothermometry (SST-(alk)) and planktonic foraminifera assemblages using the Modern Analog Technique (MAT) (SST-(foram)) along two cores of the Mediterranean Sea: MD84-632 (Levantine basin) and MD04-2797 (Siculo-Tunisian Strait). Oxygen isotope of planktonic foraminifera G. bulloides for core MD04-2797 and G. ruber for core MD84-632 were also determined. SST-alk in the Levantine basin indicate colder values at the Last Glacial Maximum (LGM) (similar to 14 degrees C) than earlier established from MAT, and a cooling amplitude of 6 degrees-7 degrees C, comparable to the central Mediterranean Sea. Climatic events such as the Younger Dryas (YD) and Heinrich events 1 and 2 (H1...
Tipo: Text
Palavras-chave: Paleoclimate; Glacial; Mediterranean; Alkenones; Foraminifera; Marine core.
Ano: 2007
URL: https://archimer.ifremer.fr/doc/00208/31954/30378.pdf

Raman Characterization of Phenyl-Derivatives: From Primary Amine to Diazonium Salts
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Betelu, S; Tijunelyte, I; Boubekeur Lecaque, L; Ignatiadis, I; Schnepf, Ac; Guenin, E; Bouchemal, N; Felidj, N; Rinnert, Emmanuel; Lamy De La Chapelle, M.
The objective of the present work is to use Raman spectroscopy for characterizing, the fate of phenyl-derivatives, from phenyl-amines to aryl-diazonium derivatives (ADD). Four ADD were investigated: (i) benzene diazoniumtetrafluoroborate (DS), (ii) 4-decyl benzene diazoniumtetrafluoroborate (DS-C10H21), (iii) 4-carboxybenzene diazoniumtetrafluoroborate (DS-COOH) and (iv) 4-(aminoethyl) benzene diazoniumtetrafluoroborate (DS-(CH2)2NH2). Raman investigation of the above ADD confirmed the existence of an N≡N bond stretching in the range of 2285-2305 cm-1. Moreover, the strong band related to CH in plane-bending and C-N-stretching modes in the 1073-1080 cm-1 range, is a signature of phenyl derivatives stemming from ADD. Furthermore, we analyzed and discuss the...
Tipo: Text
Palavras-chave: Phenyl-amines; Diazonium salts; Synthesis and characterization; Raman; DFT calculations.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00391/50262/50889.pdf

Recovery of the macrobenthic community in the Valli di Comacchio, northern Adriatic Sea, Italy
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Munari, C; Modugno, S; Ghion, F; Castaldelli, G; Fano, Ea; Rossi, R; Mistri, M.
The macrobenthic community structure of the Valli di Comacchio (northern Italy) was described in order to assess the ecological conditions of the main basins through 2001. In addition, the biotic data set gathered in 1997-1998 was compared to achieve an estimation of the eventual recovery of the lagoonal benthic assemblages. Four permanent sites (PI, M4, M5 and M6), located along a gradient of sediment texture and confinement, and representing four different areas of the lagoon, were sampled quarterly in 2001 for macrofauna and sedimentary variables (organic content, phytobenthic chlorophyll-a, depth of the redox potential discontinuity layer), and fortnightly for water variables (temperature, salinity, dissolved oxygen and planktonic chlorophyll-a). Water...
Tipo: Text
Palavras-chave: Macrobenthos; Valli; Mer Adriatique; Restauration; Macrobenthos; Valli; Adriatic Sea; Recovery.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00322/43286/43021.pdf

An improved whole life cycle culture protocol for the hydrozoan genetic model   Clytia hemisphaerica
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lechable, Marion; Jan, Anne-cecile; Duchene, Axel; Uveira, Julie; Weissbourd, Brandon; Gissat, Loann; Collet, Sophie; Gilletta, Laurent; Chevalier, Sandra; Leclère, Lucas; Peron, Sophie; Barreau, Carine; Lasbleiz, Régis; Houliston, Evelyn; Momose, Tsuyoshi.
The jellyfish species Clytia hemisphaerica (Cnidaria, Hydrozoa) has emerged as a new experimental model animal in the last decade. Favorable characteristics include a fully transparent body suitable for microscopy, daily gamete production and a relatively short life cycle. Furthermore, whole genome sequence assembly and efficient gene editing techniques using CRISPR/Cas9 have opened new possibilities for genetic studies. The quasi-immortal vegetatively-growing polyp colony stage provides a practical means to maintain mutant strains. In the context of developing Clytia as a genetic model, we report here an improved whole life cycle culture method including an aquarium tank system designed for culture of the tiny jellyfish form. We have compared different...
Tipo: Text
Palavras-chave: Animal culture; Cnidarian; Developmental biology; Genetics; Jellyfish.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00656/76820/77996.pdf

Caractéristiques des petites pêches côtières et estuariennes de la côte atlantique du sud de l'Europe - Rapport final - Sites ateliers : Estuaire de la Loire, Ile d'Yeu, Gironde, Bassin d'Arcachon, Adour
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Tipo: Text
Palavras-chave: Côtes atlantiques de l'Europe; Golfe de Gascogne; Côtes portugaises; Typologie; Enquêtes socio-économiques; Flottilles de pêche côtière et estuarienne; Indicateurs économiques; European Atlantic coasts; Bay of Biscay harbours; Portuguese coasts; Fishing typology; Socio-economic inquiries; Coastal and estuarian fishing fleet; Economics factors.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00327/43811/43381.pdf

Metagenomic to evaluate norovirus genomic diversity in oysters: Impact on hexamer selection and targeted capture-based enrichment
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Strubbia, Sofia; Schaeffer, Julien; Besnard, Alban; Wacrenier, Candice; Le Mennec, Cecile; Garry, Pascal; Desdouits, Marion; Le Guyader, Soizick.
Human virus transmission through food consumption has been identified since many years and the international trade increases the risk of dissemination of viral pathogens. The development of metagenomic approach holds many promises for the surveillance of viruses in food and water. This work aimed to analyze norovirus diversity and to evaluate strain-dependent accumulation patterns in three oyster types by using a metagenomic approach. Different hexamer sets to prime cDNA were evaluated before capture-based approach to enhance virus reads recovery during deep sequencing. The study includes the use of technical replicates of artificially contaminated oysters and the analysis of multiple negatives controls. Results showed a clear impact of the hexamer set...
Tipo: Text
Palavras-chave: Norovirus; Oysters; Metagenomic; Human enteric viruses.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00614/72575/71535.pdf

Seasonal and intraseasonal biogeochemical variability in the thermocline ridge of the southern tropical Indian Ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Resplandy, L.; Vialard, Jerome; Levy, M.; Aumont, Olivier; Dandonneau, Y.
The Sea-viewing Wide Field-of-view Sensor (SeaWiFS) time series shows high variability of surface chlorophyll at seasonal and intraseasonal time scales in the oligotrophic southern tropical Indian Ocean thermocline ridge called the Seychelles-Chagos thermocline ridge (SCTR). The SCTR is characterized by an open ocean upwelling due to local Ekman pumping, which annually maintains the mixed layer (ML) shallow and is responsive to atmospheric forcing and in particular to the Madden-Julian Oscillation (MJO) at an intraseasonal time scale. Here we present an overview of SCTR biogeochemistry and investigate the physical processes driving the response observed at seasonal and intraseasonal time scales. Using satellite observations and biophysical ocean...
Tipo: Text
Palavras-chave: Madden julian oscillation; Arabian sea; Rossby waves; Interannual variability; Circulation model; Monsoon; Temperature; Perturbations; Nutrients; Dynamics.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00185/29630/27994.pdf

Remotely Sensed Winds and Wind Stresses for Marine Forecasting and Ocean Modeling
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bourassa, Mark A.; Meissner, Thomas; Cerovecki, Ivana; Chang, Paul S.; Dong, Xiaolong; De Chiara, Giovanna; Donlon, Craig; Dukhovskoy, Dmitry S.; Elya, Jocelyn; Fore, Alexander; Fewings, Melanie R.; Foster, Ralph C.; Gille, Sarah T.; Haus, Brian K.; Hristova-veleva, Svetla; Holbach, Heather M.; Jelenak, Zorana; Knaff, John A.; Kranz, Sven A.; Manaster, Andrew; Mazloff, Matthew; Mears, Carl; Mouche, Alexis; Portabella, Marcos; Reul, Nicolas; Ricciardulli, Lucrezia; Rodriguez, Ernesto; Sampson, Charles; Solis, Daniel; Stoffelen, Ad; Stukel, Michael R.; Stiles, Bryan; Weissman, David; Wentz, Frank.
Strengths and weakness of remotely sensed winds are discussed, along with the current capabilities for remotely sensing winds and stress. Future missions are briefly mentioned. The observational needs for a wide range of wind and stress applications are provided. These needs strongly support a short list of desired capabilities of future missions and constellations.
Tipo: Text
Palavras-chave: Satellite; Wind; Stress; Ocean; Requirements.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00511/62312/66565.pdf

Surface water circulation patterns in the southeastern bay of biscay: new evidences from hf radar data
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Solabarrieta, Lohitzune; Rubio, Anna; Castanedo, Sonia; Medina, Raul; Charria, Guillaume; Hernandez, Carl.
High Frequency (HF) radar stations have been working operationally in the southeastern part of the Bay of Biscay since 2009. The (2) systems provide hourly surface currents, with 5 km spatial resolution and a radial coverage lying close to 180 km. The detailed and quantitative description of the spatial patterns observed by the HF radar offers new evidence on the main ocean processes, at different time scales, affecting a study area where surface currents show marked temporal and spatial variability. A clear seasonality in terms of sea surface currents and along-slope circulation is observed, with cyclonic and anticyclonic patterns during the winter and summer months, respectively. From the analysis of low-pass filtered currents, a key component of this...
Tipo: Text
Palavras-chave: HF radar; Surface circulation patterns; Seasonal and mesoscale variability; Inertial currents; Bay of Biscay; Iberian Poleward Current (IPC).
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00169/28063/26380.pdf

Analyse des données de pêche et de débarquement des deux segments exploitant le vivaneau rouge et le vivaneau ti-yeux dans la ZEE de Guyane
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Caro, Anthony; Lampert, Luis; Blanchard, Fabian; Fidel, Lisa; Rose, Joel.
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00074/18531/16075.pdf

An End-to-End Model Reveals Losers and Winners in a Warming Mediterranean Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Moullec, Fabien; Barrier, Nicolas; Drira, Sabrine; Guilhaumon, François; Marsaleix, Patrick; Somot, Samuel; Ulses, Caroline; Velez, Laure; Shin, Yunne-jai.
The Mediterranean Sea is now recognized as a hotspot of global change, ranking among the fastest warming ocean regions. In order to project future plausible scenarios of marine biodiversity at the scale of the whole Mediterranean basin, the current challenge is to develop an explicit representation of the multispecies spatial dynamics under the combined influence of fishing pressure and climate change. Notwithstanding the advanced state-of-the-art modeling of food webs in the region, no previous studies have projected the consequences of climate change on marine ecosystems in an integrated way, considering changes in ocean dynamics, in phyto- and zoo-plankton productions, shifts in Mediterranean species distributions and their trophic interactions at the...
Tipo: Text
Palavras-chave: Biodiversity scenario; Climate change; Ecosystem model; End-to-end model; OSMOSE; Fishing; Mediterranean Sea.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00504/61557/65469.pdf

Les communautés du zooplancton. Sous-région marine Golfe de Gascogne. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sautour, Benoît; Heroin, Debora; Raybaud, Virginie; Stemmann, Lars; Raud, Thomas; Brylinski, Jean-michel; Thibault-botha, Delphine.
Tipo: Text
Palavras-chave: Golfe de Gascogne; Zooplancton; Communautés; Recensement; Analyse; Evolution spatio-temporelle; Zones sensibles.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00329/44015/79195.pdf

Assessment and interpretation of temporal or spactial differences in shellfish productivity of typical French ecosystems
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mazurie, Joseph; Soletchnik, Patrick; Ropert, Michel; Fleury, Pierre-gildas; Auby, Isabelle; Maurer, Daniele; Bacher, Cedric.
Monitoring of Crassostrea gigas performances, from two year-classes, during 12 years, in various French shellfish farming areas have revealed great inter-annual and inter-sites differences in reproduction, growth, mortality or quality of oysters (meat content, Polydora infestation...). The presentation attempts to highlight how a comparative analysis of existing temporal or spatial data on molluscs, water quality, geography or meteorogoly may help to better understand and manage shellfish ecosystems. The range of hydrobiological conditions (food availability, turbidity, temperature...) recorded at national, pluriannual scale, in relation to shellfish performances, enlarges the base of such relationship. However, undirect causative factors, either natural...
Tipo: Text
Palavras-chave: Climatic modulation; Hydro geography; Reproduction; Growth; Spatial differences; Water quality; Mortality; Shellfish productivity.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/acte-3318.pdf

Multiple biomarkers of pollution effects in caged mussels on the Greek coastline
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tsangaris, C.; Kormas, K.; Strogyloudi, E.; Hatzianestis, I.; Neofitou, C.; Andral, Bruno; Galgani, Francois.
A suite of biomarkers was measured in caged mussels at areas impacted by different anthropogenic activities along the Greek coastline to assess biological effects of environmental pollution. Mussels were caged at coastal sites in the vicinity of major cities, in areas influenced by major industries, agricultural practices and in islands away from known sources of pollution. Biomarkers indicative of neurotoxicity (acetylcholinesterase, AchE), oxidative stress (catalase, CAT), phase 11 biotransformation of xenobiotics (glutathione S-transferase, GST), metal exposure (metallothioneins, MTs) and protein synthesis (RNA:DNA ratio) were measured to assess effects of various types of pollutants. AchE activity proved to be the most responsive biomarker with...
Tipo: Text
Palavras-chave: Biomarkers; AchE; CAT; GST; MTS; RNA:DNA ratio; Mytilus galloprovincialis; Mediterranean.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00002/11286/7890.pdf

Du Mont-Saint-Michel à La Rochelle. Quelle est la qualité des eaux littorales ?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Oger-jeanneret, Helene; Burlet-parendel, Anne; Fera, Philippe; Pilven, Sophie.
7 panneaux (90 X 200 cm) qui présentent la façon dont est observé le littoral Loire-Bretagne pour le qualifier au titre de la Directive cadre sur l'eau (DCE). Ifremer et l'Agence de l'eau Loire Bretagne ont conçu cet outil de communication mis à disposition des acteurs locaux.
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00174/28508/26857.pdf

Évaluation DCE janvier 2010 - Élément de qualité : phytoplancton
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Soudant, Dominique; Belin, Catherine.
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00030/14148/11400.pdf

Rapport de Campagne. VIDEOCOR1 - Mai 2017
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fabri, Marie-claire; Et Tous Les Participants,.
The Videocor 1 expedition had the double objective of conducting the first scientific cruise of the new born Hybrid-ROV Ariane and collecting data, images and samples from cold-water corals in the Parc National des Calanques, near Marseille, France. Photos and videos will be used to measure the surface covered by this ecosystem and calculate several metrics using 3D optical mapping to reconstruct geo-referenced and scaled 3D models of seafloor scenes from multiple image frames. Some colonies were also collected for the connectivity work package of the H2020-Atlas european project, both for reproductive studies of Madrepora oculata and for the assessment of Mediterranean-Atlantic genetic connectivity http://www.euatlas. org/.
Tipo: Text
Palavras-chave: Cartographie optique; Canyon de Cassidaigne; Méditerranée.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00399/50994/51767.pdf

Courantologie. Sous-région marine Mers celtiques. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lazure, Pascal; Desmare, Stéphanie.
Tipo: Text
Palavras-chave: Mers celtiques; Courants; Processus physiques; Circulation générale; Variabilité saisonnière; Courants de marée.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00328/43925/43498.pdf

Traceurs micropaléontologiques (dinokystes et coccolithes) de l'hydrographie actuelle et holocène aux moyennes et hautes latitudes de l'Atlantique Nord
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Solignac, Sandrine.
Devant le problème du réchauffement planétaire, il est indispensable d'approfondir notre compréhension des mécanismes et des rétroactions qui régulent le climat pour pouvoir prédire les conséquences de tels changements. L'étude des climats passés permet de mettre en évidence la façon dont les événements climatiques s'encharnent. En particulier, étudier des périodes plus chaudes que l'actuelle permet de mieux comprendre ce vers quoi nous semblons nous diriger. C'est dans cette.optique que de nombreuses recherches sont menées sur l'évolution du climat au cours de la présente période interglaciaire, 1'Holocène. Notamment, bon nombre de ces études portent sur le milieu océanique, celui-ci étant responsable d'une grande partie des transferts de chaleur à la...
Tipo: Text
Palavras-chave: Atlantique Nord; Holocène; Circulation océamque; Masse d'eau; Dinokyste; Coccolithe; Distribution; Fonction de transfert.
Ano: 2008
URL: https://archimer.ifremer.fr/doc/00505/61697/65665.pdf

Fatigue of polyamide mooring ropes for floating wind turbines
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chevillotte, Yoan; Marco, Yann; Davies, Peter; Bles, Guilhem; Arhant, Mael.
This paper describes a study of the fatigue characterization of polyamide mooring ropes for floating wind turbines. Under some conditions polyester ropes, which are favoured for offshore platform station-keeping, are too stiff for wind turbine moorings, and polyamide may be a suitable alternative. While early studies on fatigue of braided nylon ropes showed very short lifetimes some recent results have indicated that it is possible to significantly enhance lifetime by modifying rope construction and improving fibre coatings [1]. The fatigue results presented here for ropes from a different supplier, confirm this result. In order to develop an accelerated evaluation of the fatigue performance, heat build-up tests have been performed, and promising first...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00441/55263/56757.pdf

L'énergie thermique des mers
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Marchand, Philippe.
Ocean Thermal Energy Conversion, OTEC, is a concentrated renewable source of energy available in the one third of the world's ocean lying in the tropics. An OTEC plant is a heat engine fed with warm surface water and cold water pumped up from the deep. The difference of temperature, 20°C, is small, it can be used to produce electricity as well as fresh water. Plants can be installed on land or at sea. The main problem is to build and deploy a large diameter pipe to pump the cold water from 600 to 1 000 m in depth. France, who discovered the idea realised some major demonstrations fifty years ago. More recently US and Japanese firms have spent more than dollars 200 millions to develop prototypes and research in this field. Several major OTEC pilot plants...
Tipo: Text
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1986/rapport-4310.pdf

Valorisation des produits de la mer en Guyane - Etude technique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Knockaert, Camille.
Les espèces locales sont abondantes en quantité et en variétés. Jusqu'à présent la pêche est essentiellement orientée sur la crevette. Cependant dans un contexte de difficultés (ressource + cours à la baisse pour schématiser) ce secteur cherche à diversifier son activité et s'intéresse à la valorisation de son potentiel de pêche qui était jusque là négligé. La seule activité de transformation est l'oeuvre de quelques congélateurs se bornant à reconditionner les produits : ensachages en filets, Dames ou entiers (faible valeur ajoutée).  Ce rapport a pour objet de définir les possibilités de valorisation de la filière des produits de la mer en Guyane, que ce soit par l'amélioration des structures existantes ou la création de nouvelles activités.  Dans une...
Tipo: Text
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00134/24510/22536.pdf

Bilan des productions expérimentales d'huîtres plates de 2005 à 2010 au Laboratoire de Génétique et Pathologie de La Tremblade
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Heurtebise, Serge; Harrang, Estelle; Lallias, Delphine; Lapegue, Sylvie.
L’objectif de ce rapport est de détailler les productions d’huîtres plates européennes, Ostrea edulis, dans le cadre des projets de recherche développés autour de l’amélioration génétique de cette espèce. Nous avons choisi de synthétiser les actions de recherche dans un premier temps puis la production des huîtres et les expérimentations dans un ordre chronologique.
Tipo: Text
Palavras-chave: Huître plate; Ostrea edulis; Production expérimentale; Amélioration génétique.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00013/12421/9211.pdf

Experimental-study of the impact of hydrocarbons on the intertidal benthic community - the mahakam delta (east kalimantan, indonesia)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dutrieux, E.
Two simulated oil-spills in the Mahakam delta revealed the consequences of this type of pollution on the site's main benthic populations. The results of these trials differentiated between short-term (high toxicity similar to chemical pollution) and long-term effects (similar to organic pollution) of hydrocarbons. Two factors affected the distribution of the main macrofaunal species: intertidal height and degree of pollution. The latter was measured either by the initial quantity of oil spilled or by concentrations measured at each sampling. These trials also showed that dispersants were inefficient and that dredging treatments did not yield positive results. Often no treatment was preferable to these two treatments. A global statistical analysis was...
Tipo: Text
Palavras-chave: OIL POLLUTION; TOXICITY; DISPERSANT; BENTHIC COMMUNITY; INDONESIA.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00100/21153/18772.pdf

Ecosystèmes aquatiques : ressources et valorisation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Tipo: Text
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00187/29862/28315.pdf

Resource Competition Affects Plankton Community Structure; Evidence from Trait-Based Modeling
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sourisseau, Marc; Le Guennec, Valerie; Le Gland, Guillaume; Plus, Martin; Chapelle, Annie.
Understanding the phenology of phytoplankton species is still a challenge and despite a lot of theoretical work on competition for ressources this process is under-represented in deterministic models. To study the main driver of the species selection, we thus used a trait-based model that keeps phenotypic variability through physiological trait parameterization. We next validate the results by using a key species, the toxic dinoflagellate Alexandrium minutum. Due to their monitoring, we show that harmful algae are ideal models for studying ecological niches and for contributing to this more global challenge. As a first step, a dimensionless model of an estuary (France) was built with water temperature and water exchanges deduced from a hydro-dynamic model....
Tipo: Text
Palavras-chave: Droop; Competition; Inter-specific; Estuary; Bay of Brest; Alexandrium minutum; Phenology; Niches.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00373/48414/48624.pdf

Surface Roughness Imaging of Currents Shows Divergence and Strain in the Wind Direction
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rascle, Nicolas; Chapron, Bertrand; Ponte, Aurelien; Ardhuin, Fabrice; Klein, Patrice.
Images of sea surface roughness-for example, obtained by synthetic aperture radars (SAR) or by radiometers viewing areas in and around the sun glitter-at times provide clear observations of meso- and sub-mesoscale oceanic features. Interacting with the surface wind waves, particular deformation properties of surface currents are responsible for those manifestations. Ignoring other sources of surface roughness variations, the authors limit their discussion to the mean square slope (mss) variability. This study confirms that vortical currents and currents with shear in the wind direction shall not be expressed in surface roughness images. Only divergent currents or currents with no divergence but strained in the wind direction can exhibit surface roughness...
Tipo: Text
Palavras-chave: Circulation/ Dynamics; Ageostrophic circulations; Atmosphere-ocean interaction; Mesoscale processes; Wind waves; Atm/Ocean Structure/ Phenomena; Boundary layer; Sea state.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00210/32170/30619.pdf

Cahier de procédures REPHYTOX. Document de prescription. Version 2
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Neaud-masson, Nadine; Belin, Catherine.
L'objectif du réseau REPHYTOX est la recherche et le suivi des toxines réglementées d'origine phytoplanctonique susceptibles de s’accumuler dans les produits marins de consommation, en particulier les mollusques bivalves, présents dans les zones de production ou dans les gisements naturels exploités professionnellement. Les modalités de cette surveillance sont détaillées dans ce document de prescription qui rassemble les aspects institutionnels des prescriptions et les aspects principaux de programmation. Le présent document annule et remplace les prescriptions du Cahier de Procédures REPHYTOX version 1. Il implique tous les chefs des Laboratoires Environnement et Ressources (LERs), et leurs équipes ainsi que leurs partenaires intervenant dans ce cadre. Il...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00399/50995/51776.pdf

Mise en place d'indicateurs opérationnels de suivi des couvertures de fucales dans le cadre de l'avant projet détaillé "REBENT"
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guillaumont, Brigitte.
Un-quantified observations seem to indicate a decrease in brown algae blanket in inter-tidal zones along several coastlines. The goal of this contract, which is CEVA's contribution to REBENT- Bretagne_ year 2003, regards the quantitative evaluation and long term follow up of fucales in inter-tidal zones. The work that was accomplished during a previous contract with CEVA had allowed defining a SPOT image processing protocol used to evaluate and follow up, in time, global vegetal blankets. A methodology form had been written up and two SPOT images from the Trégor region had been processed as a vegetal blanket. Results analysis showed how being able to isolate fucales, and for that matter, its various species, was necessary in order to create more pertinent...
Tipo: Text
Palavras-chave: Fucales; Staging; Intertidal; SPOT; Covers algales; Fucales; Etagement; Intertidal; SPOT; Couvertures algales.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/rapport-1657.pdf

Pathogens in aquaculture : specific pathogens or human contamination risks
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Renault, Tristan.
The vatness of aquaculture ventures worldwide has taken impressive leaps durint the past three decades, and a large portion of this pertains to mariculture. Significant strides have been made in the design and implementation of more efficient and cost effective growing areas, feed, and harvesting techniques. Moreover the economic impact of aquaculture will certainly increase in the years ahead.
Tipo: Text
Palavras-chave: Mycoplasmas; Chlamydiae; Rickettsia; Bacteria; Virus; Aquaculture; Pathogens.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/1995/acte-2899.pdf

Etude préalable à la diversification d'huîtres creuses en France : isolement reproductif entre Crassostrea gigas et C. angulata
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Balabaud, Karen.
Avec 30 000 tonnes d'huîtres produites chaque année, l'ostréiculture est l'activité principale du bassin de Marennes-Oléron. Caractérisé par une très forte interaction avec les milieux professionnels de la conchyliculture, l'Ifremer se doit avant tout de répondre à leurs questions, en particulier en matière de croissance, de reproduction et surtout en matière de mortalité de l'huître creuse. En effet, l'huître portugaise Crassostrea angulata fut décimée de 1968 à 1972 par un agent pathogène de type iridovirus. Pour faire face à cette disparition des populations d'huîtres japonaises Crassostrea gigas sont alors introduites en France. Mais, les professionnels s'interrogent sur la bonne adaptation de l'huître creuse japonaise à l'environnement français et...
Tipo: Text
Palavras-chave: Génétique; Croisement; Isolement reproductif; Huîtres creuses; Hybrides; Marqueurs moléculaires; PCR; Crassostrea gigas; Crassostrea angulata.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00033/14441/11740.pdf

Interim Report of the Working Group on Oceanic Hydrography (WGOH), 5–7 April 2016, Sopot, Poland
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ICES.
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00587/69936/67836.pdf

Improvement of feed intake through supplementation with an attractant mix in European seabass fed plant-protein rich diets
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dias, Jorge; Gomes, Ef; Kaushi, Sj.
The incorporation of an attractant mixture by substitution of an equivalent amount of basal dietary mixture was studied in terms of feed intake and growth performance in European seabass juveniles (mean initial weight : 17 g) fed plant-protein rich diets during 21 days. Three diets had as main protein sources; fish meal, or one of two soy protein concentrates (S and E). To the basal mixture of these last two diets, as well as to a corn-gluten based diet, an attractant amino acid mixture was added at a 2.5% level. Daily feed intake was measured throughout the experimental period. Feed intake and weight gain were highest in seabass fed the fish meal based diet. In those fed the soy protein concentrate diets, the addition of the attractant mixture improved...
Tipo: Text
Palavras-chave: Dicentrarchus labrax; Plant proteins; Feed intake; Amino acids; Feed attractants.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00335/44653/57337.pdf

Demande d'ouverture à la pêche à pied du gisement de moules à la pointe de la Percée
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cochard, Marie-laure; Goascoz, Nicolas.
Tipo: Text
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00226/33688/79491.pdf

Three-dimensional structure of asthenospheric flow beneath the Southeast Indian Ridge
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: West, Bp; Wilcock, Wsd; Sempere, Jc; Geli, Louis.
Both geophysical and geochemical evidence suggests the presence of along-axis asthenospheric flow toward the Australian-Antarctic Discordance (AAD) beneath the Southeast Indian Ridge (SEIR). We use a three-dimensional, finite-volume formulation of viscous flow to investigate the structure of asthenospheric motion beneath the SEIR. Our results show that simple continental separation in either a constant- or variable-viscosity mantle without horizontal temperature gradients is unable to reproduce the inferred asthenospheric flow velocities and observed geographic distribution of the ''Indian'' and ''Pacific'' upper mantle isotopic provinces. The presence of a cooler, more viscous mantle directly beneath the AAD is necessary to reproduce observed constraints....
Tipo: Text
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00068/17903/15439.pdf

Maldi mass spectrometry imaging applied to small molecules localization
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guitton, Yann; Mondeguer, Florence; Nicolau, Elodie; Royer, Florence; Hilbert, Jean-louis; Fournier, Isabelle; Wisztorski, Maxence.
MALDI Mass Spectrometry Imaging (MALDI-MSI) is a two-dimensional MALDI mass spectrometric technique used to visualize the spatial distribution of a large variety of biological molecules (from small metabolites to large proteins) without extraction, purification, separation or labelling of biological samples. Since its introduction by Caprioli et al in 1997, it has become one of the most important molecular histology methods for biomarker hunting and for understanding the spatial distribution of biomolecules in various tissues. MALDI-MSI is thus ideal for complementing the expanding field of metabolomics. Despite the fact that MALDI-MSI have been very successfully applied in divers studies (even in clinical applications) its use remains far from routine,...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00179/29041/27479.pdf

Description of a contourite depositional system on the Demerara Plateau: Results from geophysical data and sediment cores
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tallobre, Cedric; Loncke, Lies; Bassetti, Maria-angela; Giresse, Pierre; Bayon, Germain; Buscail, Roselyne; De Madron, Xavier Durrieu; Bourrin, Francois; Vanhaesebroucke, Marc; Sotin, Christine.
The Demerara Plateau, belonging to the passive transform margin of French Guiana, was investigated during the IGUANES cruise in 2013. The objectives of the cruise were to explore the poorly-known surficial sedimentary column overlying thick mass transport deposits as well as to understand the factors controlling recent sedimentation. The presence of numerous bedforms at the seafloor was observed thanks to newly acquired IGUANES bathymetric, high resolution seismic and chirp data, while sediment cores allowed the characterization of the deposits covering the mass transport deposits. Modern oceanographic conditions were determined in situ, using mooring monitoring over a 10-month period. Our data indicate the presence of a Contourite Depositional System...
Tipo: Text
Palavras-chave: Marginal plateau; Contourite; Comet tail; Demerara Plateau.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00308/41957/41220.pdf

Using an integral projection model to assess the effect of temperature on the growth of gilthead seabream Sparus aurata
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Heather, F. J.; Childs, D. Z.; Darnaude, A. M.; Blanchard, J. L.
Accurate information on the growth rates of fish is crucial for fisheries stock assessment and management. Empirical life history parameters (von Bertalanffy growth) are widely fitted to cross-sectional size-at-age data sampled from fish populations. This method often assumes that environmental factors affecting growth remain constant over time. The current study utilized longitudinal life history information contained in otoliths from 412 juveniles and adults of gilthead seabream, Sparus aurata, a commercially important species fished and farmed throughout the Mediterranean. Historical annual growth rates over 11 consecutive years (2002-2012) in the Gulf of Lions (NW Mediterranean) were reconstructed to investigate the effect of temperature variations on...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00445/55686/74998.pdf

Forces, failles et opportunités de la recherche française en écologie trophique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Perga, Marie-elodie; Danger, Michael; Dubois, Stanislas; Fritch, Clementine; Gaucherel, Cedric; Hubas, Cedric; Jabot, Franck; Lacroix, Gerard; Lefebvre, Sebastien; Marmonier, Pierre; Bec, Alexandre.
The French National Institute of Ecology and Environment (INEE) aims at fostering pluridisciplinarity in Environmental Science and, for that purpose, funds ex muros research groups (GDR) on thematic topics. Trophic ecology has been identified as a scientific field in ecology that would greatly benefit from such networking activity, as being profoundly scattered. This has motivated the seeding of a GDR, entitled “GRET”. The contours of the GRET's action, and its ability to fill these gaps within trophic ecology at the French national scale, will depend on the causes of this relative scattering. This study relied on a nationally broadcasted poll aiming at characterizing the field of trophic ecology in France. Amongst all the unique individuals that fulfilled...
Tipo: Text
Palavras-chave: Trans-ecosystem; Scientific network; Cleavage; Ecology; Population; Community.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00442/55338/56849.pdf

Factors regulating the Great Calcite Belt in the Southern Ocean and its biogeochemical significance
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Balch, William M.; Bates, Nicholas R.; Lam, Phoebe J.; Twining, Benjamin S.; Rosengard, Sarah Z.; Bowler, Bruce C.; Drapeau, Dave T.; Garley, Rebecca; Lubelczyk, Laura C.; Mitchell, Catherine; Rauschenberg, Sara.
The Great Calcite Belt (GCB) is a region of elevated surface reflectance in the Southern Ocean (SO) covering similar to 16% of the global ocean and is thought to result from elevated, seasonal concentrations of coccolithophores. Here we describe field observations and experiments from two cruises that crossed the GCB in the Atlantic and Indian sectors of the SO. We confirm the presence of coccolithophores, their coccoliths, and associated optical scattering, located primarily in the region of the subtropical, Agulhas, and Subantarctic frontal regions. Coccolithophore-rich regions were typically associated with high-velocity frontal regions with higher seawater partial pressures of CO2 (pCO(2)) than the atmosphere, sufficient to reverse the direction of gas...
Tipo: Text
Palavras-chave: Coccolithophores; Trace metals; Carbonate chemistry; Southern Ocean; Subantarctic Front; Subtropical Front.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00383/49412/49883.pdf

DBCP Drifting Buoys GDAC data management report 2018
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Carval, Thierry; Ouellet, Mathieu; Gaboury, Isabelle; Emzivat, Gilbert.
This report covers the activity of Drifting Data Buoys Global Data Assembly Centre (DDB GDAC) published for Data Buoy Cooperation Panel (DBCP) Thirty Fourth Session.
Tipo: Text
Palavras-chave: Argo.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00460/57198/59168.pdf

Function and diversity of the Ship, Trinity, and Tiger Shoal Complex, with emphasis on macrofauna and spawning blue crabs (Callinectes sapidus)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gelpi, Carey.
The ecological and economic value of sandy shoals off the Louisiana coast is not well understood. During three years of comprehensive benthic sampling and environmental measurements I studied the Ship, Trinity, Tiger Shoal Complex (STTSC), which comprises changing and discrete benthic habitats including high relief sandy shoals, and muddier, mostly deeper off-shoal areas, prone to hypoxia. Benthic macrofaunal assemblages of shoals included endemic species, and shoal communities were significantly different from each other and the muddier offshoal habitat, contributing to northern Gulf of Mexico (GoM) regional biodiversity. Sand percentage was the most influential environmental parameter shaping macrofaunal community composition across the region. My study...
Tipo: Text
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00499/61030/64435.pdf

Indicator-Based Geostatistical Models For Mapping Fish Survey Data
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Petitgas, Pierre; Woillez, Mathieu; Doray, Mathieu; Rivoirard, Jacques.
Marine research survey data on fish stocks often show a small proportion of very high-density values, as for many environmental data. This makes the estimation of second-order statistics, such as the variance and the variogram, non-robust. The high fish density values are generated by fish aggregative behaviour, which may vary greatly at small scale in time and space. The high values are thus imprecisely known, both in their spatial occurrence and order of magnitude. To map such data, three indicator-based geostatistical methods were considered, the top-cut model, min–max autocorrelation factors (MAF) of indicators, and multiple indicator kriging. In the top-cut and MAF approaches, the variable is decomposed into components and the most continuous ones...
Tipo: Text
Palavras-chave: Top-cut; MAF; Indicators; Co-kriging; Skewed distribution; Anchovy; Bay of Biscay; Fisheries survey data; Aggregation.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00429/54021/55339.pdf

First transitions in circular Couette flow with axial stratification
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hua, Bach-lien; Le Gentil, Sylvie; Orlandi, P.
The first flow regimes which have been observed experimentally for a circular Couette flow with a stable, axial stratification in density are investigated through direct numerical simulations of the three-dimensional Navier-Stokes equations for a Boussinesq fluid. The setup of two concentric cylinders has a nondimensional gap width of epsilon=(b-a)/a=0.289; the outer cylinder is tired and the stratification in density in the axial direction is linear. The main effect of an axial density stratification is to reduce the height of the Taylor vortices and to cause the formation of density layers of small aspect ratio. For large enough Prandtl number, the primary bifurcation from circular Couette flow is found to be axisymmetric and of Hopf-type in the direct...
Tipo: Text
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00336/44750/57508.pdf

Feeding habits and population aspects of the spotted goatfish, Pseudupeneus maculatus (Perciformes: Mullidae), on the continental shelf of northeast Brazil
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Soares, Andrey; Souza Lira, Alex; Guazzelli Gonzalez, Julio; Nolé Eduardo, Leandro; Lucena-frédou, Flavia; Le Loch, Francois; Padovani Ferreira, Beatrice; Fredou, Thierry.
This study provides information about the feeding habits, population aspects and spatial distribution of the spotted goatfish, Pseudupeneus maculatus, along the coast of the tropical Brazilian continental shelf. Distribution patterns are described using length frequencies and catch rates. Stable isotope ratios of carbon (δ13C) and nitrogen (δ15N), along with stomach contents, were analysed to determine the diet of the spotted goatfish. Multivariate analysis and numerical indicators of the diet, such as numerical frequency, frequency of occurrence and weight percentage, were computed to evaluate the diet composition. The mean trophic position was defined using both stable isotope ratios and stomach content analysis. The length at first maturity for the...
Tipo: Text
Palavras-chave: Distribution patterns; Stomach content analysis; Brazil; Cross-shelf; Stable isotopes.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00628/74046/73453.pdf

Intensive use of Lagrangian trajectories to quantify coastal area dispersion
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Petton, Sebastien; Pouvreau, Stephane; Dumas, Franck.
Coastal waters are subject to great environmental and anthropogenic pressures. The diffusion and the transport of these waters are a key element for environmental, ecological and economic management. There are numerous indicators of hydrological characteristics based on theories of transport time scale. However, these indicators strongly depend on the geographical shape of the studied area and tend to give information after long integration time periods, generally on the order of weeks. Here, to qualify a coastal area’s dispersion more precisely, we combined two Lagrangian approaches and estimated a local diffusivity. This paper presents the numerical implementation and the results obtained over a tidally flushed, semi-enclosed water body located at...
Tipo: Text
Palavras-chave: Hydrodynamic model; Lagrangian analysis; Barycentric repositioning method; Local diffusivity.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00609/72068/70919.pdf

Genetic diversity of the harmful family Kareniaceae (Gymnodiniales, Dinophyceae) in France, with the description of Karlodinium gentienii sp. nov.: A new potentially toxic dinoflagellate
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Nezan, Elisabeth; Siano, Raffaele; Boulben, Sylviane; Six, Christophe; Bilien, Gwenael; Cheze, Karine; Duval, Audrey; Le Panse, Sophie; Quere, Julien; Chomerat, Nicolas.
The family Kareniaceae is mostly known in France for recurrent blooms of Karenia mikimotoi in the Atlantic, English Channel, and Mediterranean Sea and for the unusual green discoloration in the saltwater lagoon of Diana (Corsica) caused by Karlodinium corsicum in April 1994. In terms of diversity, this taxonomic group was long overlooked owing to the difficult identification of these small unarmored dinoflagellates. In this study, thanks to the molecular characterization performed on single cells from field samples and cultures, twelve taxonomic units were assigned to the known genera Karenia, Karlodinium and Takayama, whereas one could not be affiliated to any described genus. The molecular phylogeny inferred from the D1–D2 region of the LSU rDNA showed...
Tipo: Text
Palavras-chave: Genetic diversity; Haemolytic; Kareniaceae; Pigments; Single cell; Taxonomy.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00225/33611/32310.pdf

Growth of European hake (Merluccius merluccius) in the Gulf of Lions based on conventional tagging
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mellon-duval, Capucine; De Pontual, Helene; Metral, Luisa; Quemener, Loic.
Growth of European hake was estimated from the results of a conventional tagging study in the Gulf of Lions, the first tagging experiment to have been undertaken on the species in Mediterranean waters. In all, 4277 hake 15–40 cm long were tagged and released on the inshore fishing grounds during spring 2006. The overall recapture rate was 6.5% and times-at-liberty ranged from 1 to 717 d. Growth rate in hake varied with size and sex. The estimated growth parameter (von Bertalanffy k) was estimated as double previously published values based on size frequency distribution in the area. Compared with recent growth parameters derived from the tagging experiments in the Bay of Biscay, k was estimated to be slightly lower in the Gulf of Lions. With this faster...
Tipo: Text
Palavras-chave: Age estimation; European hake; Growth; Mediterranean; Tagging.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00000/11134/11532.pdf

Autonomous profiling float observations of the high-biomass plume downstream of the Kerguelen Plateau in the Southern Ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Grenier, M.; Della Penna, A.; Trull, T. W.
Natural iron fertilisation from Southern Ocean islands results in high primary production and phytoplankton biomass accumulations readily visible in satellite ocean colour observations. These images reveal great spatial complexity with highly varying concentrations of chlorophyll, presumably reflecting both variations in iron supply and conditions favouring phytoplankton accumulation. To examine the second aspect, in particular the influences of variations in temperature and mixed layer depth, we deployed four autonomous profiling floats in the Antarctic Circumpolar Current near the Kerguelen Plateau in the Indian sector of the Southern Ocean. Each "bio-profiler" measured more than 250 profiles of temperature (T), salinity (S), dissolved oxygen,...
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00296/40724/39725.pdf

Growth and decay of a marine terminating sector of the last British-Irish Ice Sheet: a geomorphological reconstruction
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Finlayson, Andrew; Fabel, Derek; Bradwell, Tom; Sugden, David.
The boundary conditions that govern ice sheet dynamics can change significantly with the development of marine margins. This paper uses the glacial landscape in western Scotland to reconstruct changes in the British-Irish Ice Sheet that accompanied the growth and decay of a marine sector over the Malin Shelf. Ice advanced from a restricted mountain ice sheet with tidewater margins after similar to 35 ka BP, and reached the continental shelf in similar to 7 ka (average rate of similar to 30 m a(-1)). Early ice flow had been directed through north-south, geologically controlled, over-deepened fjords that were carved during previous 'restricted' glaciations. This flow regime was abandoned with development of the Malin Shelf ice sheet sector; ice flow...
Tipo: Text
Palavras-chave: British-Irish Ice Sheet; Glacial landscape; Palaeoglaciology; Marine terminating; Malin Shelf.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00291/40240/83001.pdf

Extended evaluation of polymeric and lipophilic sorbents for passive sampling of marine toxins
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Zendong, Zita; Herrenknecht, Christine; Abadie, Eric; Brissard, Charline; Tixier, Celine; Mondeguer, Florence; Sechet, Veronique; Amzil, Zouher; Hess, Philipp.
Marine biotoxins are algal metabolites that can accumulate in fish or shellfish and render these foodstuffs unfit for human consumption. These toxins, released into seawater during algal occurrences, can be monitored through passive sampling. Acetone, methanol and isopropanol were evaluated for their efficiency in extracting toxins from algal biomass. Isopropanol was chosen for further experiments thanks to a slightly higher recovery and no artifact formation. Comparison of Oasis HLB, Strata-X, BondElut C18 and HP-20 sorbent materials in SPE-mode led to the choice of Oasis HLB, HP-20 and Strata-X. These three sorbents were separately exposed as passive samplers for 24 h to seawater spiked with algal extracts containing known amounts of okadaic acid (OA),...
Tipo: Text
Palavras-chave: Passive sampling; Oasis HLB; Strata-X; LOPE; PDMS; SPATT.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00186/29756/28187.pdf

Les conserves des produits de la mer
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Nicolle, Jean-pierre; Knockaert, Camille.
This document is designed for people interested both in the theory and the process of sterilizing canned foods. This study mainly concerns the transformation of sea products. Time and money are often wasted because basic rules are ignored or not applied properly
Tipo: Text
Palavras-chave: Codex standards; Hygiene; Fish handling; Fish inspection regulations; Quality control; Human food; Processing fishery products; Canned products; Seafood.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/rapport-640.pdf

Swath bathymetry reveals active arc-continent collision near Taiwan
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lallemand, Serge E.; Liu, Char-shine; Act Cruise Scientific Team,.
A joint French‐Taiwanese cruise in May and June 1996 on the French research vessel L'Atalante has provided detailed structural images of the sea floor east and southwest of Taiwan. High quality swath bathymetry (see Figure 1) and seismic reflection profiles collected in southeastern and southwestern offshore areas near Taiwan will increase our understanding of how the Luzon Arc is deformed by its collision with the Chinese passive margin and how the Manila Trench connects with the deformation front on Taiwan. The data collected off the eastern coast of Taiwan will elucidate the nature of the plate boundary between the Ryukyu subduction zone and the Taiwan mountain belt and reveal the mode of back arc opening in the Southern Okinawa Trough. The...
Tipo: Text
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00451/56265/57835.pdf

Etat d'avancement des travaux sur les poissons tropicaux en Martinique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Soletchnik, Patrick; Thouard, Emmanuel; Galllet De Saint-aurin, D.; Suquet, Marc; Hurtaud, P.; Mesdouze, J. P.
Ce document se compose de 3 publications :  - overview of the studies conducted on the finfish, Palometa (Trachinotus goodei), in Martinique,  - spawning of palometa (Trachinotus goodei), in capacity, - spawning of yellowtail snapper (Ocyurus chrysurus ; Bloch, 1791) in capacity.  Cette dernière publication, résume l'essentiel des informations obtenues sur la sarde et présentées d'une façon exhaustive dans le document scientifique n°9.  Les 2 premières publications de ce document, consacrées à la carangue, font état des derniers résultats acquis sur cette espèce.
Tipo: Text
Palavras-chave: Aquaculture; Poissons tropicaux; Elevage; Maturation; Reproduction; Trachinotus goodei; Ocyurus chrysurus; Martinique; Aquaculture; Tropical finfishs; Rearing; Maturation; Reproduction; Trachinotus goodei; Ocyurus chrysurus; Martinique.
Ano: 1988
URL: http://archimer.ifremer.fr/doc/00131/24262/22258.pdf

How to elaborate integrated management of transitional water ? Assessment of the reference state in Biguglia lagoon (Corsica, france)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Garrido, Marie; Cecchi, Philippe; Malet, Nathalie; De Wit, Rutger; Pasqualini, Vanina.
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00341/45211/44633.pdf

Relationship between PAH biotransformation as measured by biliary metabolites and EROD activity, and genotoxicity in juveniles of sole (Solea solea)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Wessel, Nathalie; Santos, Raphael; Menard, Dominique; Le Menach, K.; Buchet, Vincent; Le Bayon, Nicolas; Loizeau, Veronique; Burgeot, Thierry; Budzinski, H.; Akcha, Farida.
Polycylic aromatic hydrocarbons (PAHs) are ubiquitous contaminants in the marine environment Their toxicity is mainly linked to the ability of marine species to biotransform them into reactive metabolites PAHs are thus often detected at trace levels in animal tissues For biomonitoring purposes this findings have two main consequences (i) the determination of the PAH tissue concentration is not suitable for the evaluation of individual exposure to PAHs (ii) It can explain sometimes the lack of correlations obtained with relevant markers of toxicity such as genotoxicity biomarkers The aim of the present study was to better investigate the link between PAH exposure and genotoxicity in marine flatfish During a laboratory experiment juvenile soles were exposed...
Tipo: Text
Palavras-chave: Ecotoxicology; Sole; PAH; Metabolites; EROD; Comet assay.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00018/12970/10834.pdf

How do microalgae perceive light in a high-rate pond? Towards more realistic Lagrangian experiments
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Demory, David; Combe, Charlotte; Hartmann, Philipp; Talec, Amelle; Pruvost, Eric; Hamouda, Raouf; Souille, Fabien; Lamarea, Pierre-olivier; Bristeau, Marie-odile; Sainte-marie, Jacques; Rabouille, Sophie; Mairet, Francis; Sciandra, Antoine; Bernard, Olivier.
Hydrodynamics in a high-rate production reactor for microalgae cultivation affects the light history perceived by cells. The interplay between cell movement and medium turbidity leads to a complex light pattern, whose forcing effects on photosynthesis and photoacclimation dynamics are nontrivial. Hydrodynamics of high density algal ponds mixed by a paddle wheel has been studied recently, although the focus has never been on describing its impact on photosynthetic growth efficiency. In this multidisciplinary downscaling study, we first reconstructed single cell trajectories in an open raceway using an original hydrodynamical model offering a powerful discretization of the Navier-Stokes equations tailored to systems with free surfaces. The trajectory of a...
Tipo: Text
Palavras-chave: Photosynthesis; Hydrodynamics; Modelling; Photoacclimation; Dunaliella salina; Non-photochemical quenching.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00445/55692/57352.pdf

Apport en substances dangereuses par le dragage et le clapage. Sous-région marine Méditerranée occidentale. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Guyader, Céline.
Tipo: Text
Palavras-chave: Méditerranée; Substances dangereuses; Dragage; Clapage; Sédiments; Immersion.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00331/44235/43804.pdf

Applicability of Dynamic Energy Budget (DEB) models across steep environmental gradients
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Monaco, Cristian; Mcquaid, Christopher D.
Robust ecological forecasting requires accurate predictions of physiological responses to environmental drivers. Energy budget models facilitate this by mechanistically linking biology to abiotic drivers, but are usually ground-truthed under relatively stable physical conditions, omitting temporal/spatial environmental variability. Dynamic Energy Budget (DEB) theory is a powerful framework capable of linking individual fitness to environmental drivers and we tested its ability to accommodate variability by examining model predictions across the rocky shore, a steep ecotone characterized by wide fluctuations in temperature and food availability. We parameterized DEB models for co-existing mid/high-shore (Mytilus galloprovincialis) and mid/low-shore (Perna...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00605/71690/70130.pdf

Opération Grille Nationale de Qualité des huîtres creuses Crassostrea gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Baud, Jean-pierre; Goyard, Emmanuel.
Le programme "Qualité de l'huître creuse", engagé par IFREMER en 1995, se propose d'apporter les outils nécessaires à l'élaboration d'une grille de qualité pour ce coquillage. Cette grille doit être objective et utilisable dans le cadre des études commerciales ou par le consommateur.
Tipo: Text
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00081/19268/16863.pdf

Casiers profonds. Guadeloupe. 2017. Observation des Marées au débarquement - OBSDEB
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public. Ces indicateurs intègrent...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00491/60279/63703.pdf

Improving Knowledge of Water-Mass Circulation in the English Channel Using Radioactive Tracers
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bailly Du Bois, Pascal; Rozet, M; Thoral, K; Salomon, Jean-claude.
New tools are now available to make more accurate deteminations of radio-tracer distribution :  - Repositioning of station locations at the same tide reference-time, giving a homogeneous spatial data set, coupled with the possibility of interpolating and quantifying the amounts of dissolved radioactivity flowing through the English Channel. - The first measurements of tritium (3H) in seawater on a large scale in the English Channel demonstrate that this fully conservative radionuclide is a clearly identifiable marker of industrial releases.  Recent campaigns carried out during the FluxManche II CCE (1994) programme show the general distribution of dissolved radionuclides 137Cs, 134Cs, 125Sb and 3H in the English Channel and Irish Sea. The re-utilization of...
Tipo: Text
Palavras-chave: English channel; Tritium; Radioactive tracer; Watre mass circulation.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/1997/acte-559.pdf

Nouvelle approche dans l'etude de la dynamique sedimentaire des estuaires macrotidaux a faible debit fluvial
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: L'Yavanc, J; Bassoullet, P.
The short estuaries located on the English Channel and Atlantic coasts are distinguished by short-lived flood peaks and a very small average water discharge. Affected by large tide ranges during spring tides, they exhibit very different hydrosedimentological characteristics with low fluvial sediment input compared to marine sediment input. The formulation of a mathematical model for cohesive suspended matter transport and bottom evolution has necessitated a comparative study of bathymetric data and the recording of seasonal sediment movement in the Morlaix estuary.
Tipo: Text
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00267/37864/35945.pdf

Review and compilation of habitat models in European Seas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Virtanen, Elina; Niemelä, Waltteri; Bekkby, Trine; Gonçalves, Jorge; Laamanen, Leena; Lillis, Helen; Manca, Eleonora; Pesch, Roland; Tempera, Fernando; Vasquez, Mickael; Viitasalo, Markku; Castle, Lewis; O’keefe, Eimear.
A summary of European studies to date that have aimed to model the potential distribution of seabed habitats or habitat-forming species. This report is the result of a literature review covering the period 2007-2017.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00636/74783/75027.pdf

Cecropins as a marker of Spodoptera frugiperda immunosuppression during entomopathogenic bacterial challenge
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Duvic, B.; Jouan, V.; Essa, N.; Girard, P-a; Pages, S.; Khattar, Z. Abi; Volkoff, N-a; Givaudan, A.; Destoumieux-garzon, Delphine; Escoubas, Jean-michel.
An antimicrobial peptide (AMP) of the cecropin family was isolated by HPLC from plasma of the insect pest, Spodoptera frugiperda. Its molecular mass is 3910.9 Da as determined by mass spectrometry. Thanks to the EST database Spodobase, we were able to describe 13 cDNAs encoding six different cecropins which belong to the sub-families CecA, CecB, CecC and CecD. The purified peptide identified as CecB1 was chemically synthesized (syCecB1). It was shown to be active against Gram-positive and Gram-negative bacteria as well as fungi. Two closely related entomopathogenic bacteria, Xenorhabdus nematophila F1 and Xenorhabdus mauleonii VC01(T) showed different susceptibility to syCecB1. Indeed, X. nematophila was sensitive to syCecB1 whereas X. mauleonii had a...
Tipo: Text
Palavras-chave: Humoral immunity; Innate immunity; Immunosuppression; Lepidopteran; Invertebrate.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00086/19728/17485.pdf

Surveillance écologique et halieutique de l'environnement marin du site de la centrale de Penly (Manche Est) : Année 1990
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Arzul, Geneviève; Erard-le Denn, Evelyne; Halgand, Daniel; Quiniou, Francoise; Tetard, Alain; Toularastel, France; Vincke, Marie-claude.
Surveillance n°1, 2nd phase, of PENLY nuclear power-plant takes In account studies between April and September 1990. Hydrology, microbiology, phytoplankton, zooplankton, fishing are studied.
Tipo: Text
Palavras-chave: Pelagos; Halieutique; Centrale nucléaire; Surveillance; Pelagos; FIshing; Nuclear power plant; Monitoring.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00432/54392/55722.pdf

Synthèse de l’évaluation de l’atteinte du bon état écologique des Poissons et Céphalopodes au titre du descripteur 1 par façade maritime
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer; Coordination Nationale Directive Cadre Stratégie pour le Milieu Marin, Bon Etat Ecologique.
Synthèse de l’évaluation de l’atteinte du bon état écologique des Poissons et Céphalopodes au titre du descripteur 1 par façade maritime : - Manche Est - mer du Nord - Nord Atlantique - Manche Ouest - Sud - Atlantique - Méditerranée
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00490/60197/63743.pdf

Pêcheries minotières
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Goulletquer, Philippe.
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00608/71978/70675.pdf

Oceanic connectivity by green turtle ine the WIO
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bourjea, Jerome; Dalleau, Mayeul.
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00272/38325/36566.pdf

Detection of oyster herpesvirus DNA and proteins in asymptomatic Crassostrea gigas adults
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Arzul, Isabelle; Renault, Tristan; Thebault, Anne; Gerard, Andre.
Since 1972, several herpes-like virus infections have been reported among different bivalve species around the world. Most of these reports involved larvae or juveniles presenting high mortalities. Two case reports of herpes-like viruses concerned adult oysters, Crassostrea virginica in USA and Ostrea angasi in Australia. Molecular techniques including PCR and in situ hybridization (ISH) have been recently developed to detect the oyster herpesvirus genome. In the present study, 30 Pacific oyster, Crassostrea gigas, adults have been analyzed using three different techniques: PCR, ISH and immunochemistry, in order to detect herpesviruses in asymptomatic individuals. PCR and ISH allowed detection of oyster herpesvirus DNA in 93.3 and 86.6%, respectively, of...
Tipo: Text
Palavras-chave: Protein; DNA; Healthy carrier; Adult oyster; Crassostrea gigas; Herpesvirus.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/publication-697.pdf

Etude comparative par electrophorese de Scomber Scombrus et Scomber Colias
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bonnet, Marc; Pichot, Paul.
Previous research on the mackerel's blood tissue dealt with, on the one hand, blood groups, and on the other hand, the immunology of serum proteins (BONNET, 1967). Their goal was to bring to light the possible existence of distinct races within the species Scomber scombrus. The study by electrophoresis of serum and crystalline lens proteins was undertaken with this same goal in mind. Its aim was, first of all, to determine biochemical characteristics that have a definite taxonomic value, which led us to compare the protein diagrams of Scomber scombrus and Scomber colias. The results obtained are the subject of this report, in which there are also data on the equipment and techniques used. Later research will consist in seeing whether some of these...
Tipo: Text
Ano: 1970
URL: http://archimer.ifremer.fr/doc/1970/publication-3149.pdf

Quelques aspects de la végétation des algues marines supérieures du Massif Armoricain
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dizerbo, A. H.
Le Massif Armoricain qui compte plus de 700 km de littoral, est la région française la plus riche en algues marines et aussi la mieux étudiée par les algologues. Depuis le début du XIXe siècle, les herborisations se sont succédées sur toutes les côtes; cependant, l'inventaire de sa flore marine est loin d'être terminé. Actuellement, le nombre d'espèces d'algues marines supérieures qui y a été dénombré s'élève à environ 550:
Tipo: Text
Ano: 1949
URL: http://archimer.ifremer.fr/doc/00041/15227/12545.pdf

Avis concernant la mise en valeur du gisement naturel huîtrier de l'Ile d'Aix (juin 1978)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sauvagnargues, Jean-claude.
Tipo: Text
Ano: 1978
URL: https://archimer.ifremer.fr/doc/00195/30648/79231.pdf

Pêche et aquaculture: pour une exploitation durable des ressources vivantes de la mer et du littoral. Compte rendu de colloque (Nantes, 21-23 février 2004)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Biais, Gerard; Bodoy, Alain.
Tipo: Text
Ano: 2005
URL: http://archimer.ifremer.fr/doc/00040/15113/12448.pdf

Contourite depositional systems along the Mozambique channel: The interplay between bottom currents and sedimentary processes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thiéblemont, Antoine; Hernández-molina, F. Javier; Miramontes, Elda; Raisson, François; Penven, Pierrick.
We present a combined study of the geomorphology, sedimentology, and physical oceanography of the Mozambique Channel to evaluate the role of bottom currents in shaping the Mozambican continental margin and adjacent Durban basin. Analysis of 2D multichannel seismic reflection profiles and bathymetric features revealed major contourite deposits with erosive (abraded surfaces, contourite channels, moats, furrows and scours), depositional (plastered and elongated-mounded drifts, sedimentary waves), and mixed (terraces) features, which were then used to construct a morpho-sedimentary map of the study area. Hydrographic data and hydrodynamic modelling provide new insights into the distribution of water masses, bottom current circulation and associated processes...
Tipo: Text
Palavras-chave: Contourites; Bottom currents; Sedimentary processes; Water mass interfaces; Continental margin; Mozambique channel.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00488/60002/63238.pdf

Fuel consumption as a proxy for the assessment of nominal effort and variable costs: application to the French West Indies small-scale fleets
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guyader, Olivier; Angin, Baptiste; Demaneche, Sebastien; Berthou, Patrick; Reynal, Lionel.
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00243/35454/33983.pdf

Trémails. Martinique. 2019. Observation des Marées au débarquement - OBSDEB
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public. Ces indicateurs intègrent...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00646/75853/76849.pdf

Culturable heterotrophic bacteria from the euphotic zone of the indian-ocean during the summer monsoon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Nair, S; Bharathi, Pal; Chandramohan, D.
Cuturable heterotrophic bacterial counts (viable counts: VC) by surface plating on ZoBell medium and total bacterial counts (TC) by epifluorescence microscopy were carried out in sea water off the southwest coast of India during the monsoon. TC were three orders of magnitude higher than VC. Pseudomonas/Alteromonas group I was dominant in both nearshore and offshore regions. Pigmented bacteria were more abundant in offshore stations and showed multiple antibiotic resistance. Statistically there was found to be no significant differences in bacterial number and their activities between offshore and nearshore isolates. Nevertheless, the former tend to be more versatile and resistant to metals and drugs.
Tipo: Text
Palavras-chave: HETEROTROPHIC CULTURABLE BACTERIA; PHYSIOLOGICAL PROPERTIES; EUPHOTIC ZONE; INDIAN OCEAN.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00099/21015/18641.pdf

Report of the Working Group on Anchovy and Sardine and Horse Mackerel (WGANSA)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00064/17555/15082.pdf

Mise au point d'un pilote de traitement de l'eau salée souterraine de la nappe de Noirmoutier en vue de son utilisation en aquaculture. Présentation et évaluation des techniques applicables à la nurserie intensive de poissons marins
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ANVAR; IFREMER.
Le programme de recherche faisant l'objet du présent rapport a été réalisé avec l'aide financière de l'ANVAR. A la suite de la découverte de la nappe salée souterraine de Noirmoutier, l 'étude de ses utilisations possibles en aquaculture a été entreprise. La station de l'Ifremer située à Noirmoutier a pour charge de développer des techniques d'élevage applicables dans l'environnement des marais atlantiques, et s'attache principalement au développement de techniques semi-intensives de grossissement de poissons et crustacés. Dans le cadre de ces travaux, il est apparu que la saison chaude (Mai-Octobre) était propice à l a croissance d'espèces telles que le bar ou la daurade . Trois problèmes techniques liés pour partie aux caprices du climat se posent : a....
Tipo: Text
Ano: 1988
URL: https://archimer.ifremer.fr/doc/00470/58213/60715.pdf

Argo workshop in Ghana, December 2006
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pouliquen, Sylvie; Thierry, Virginie; Coatanoan, Christine; Gaillard, Fabienne; Poulain, Pm; Carval, Thierry.
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/acte-6147.pdf

Sequestration efficiency in the iron-limited North Atlantic: Implications for iron supply mode to fertilized blooms
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Moigne, Frederic A. C.; Moore, C. Mark; Sanders, Richard J.; Villa-alfageme, Maria; Steigenberger, Sebastian; Achterberg, Eric P.
Estimates of the amount of carbon sequestered in the ocean interior per unit iron (Fe) supplied, as quantified by the sequestration efficiency (C-effx), vary widely. Such variability in C-effx has frequently been attributed to estimate uncertainty rather than intrinsic variability. Here we derive new estimates of C-effx for the subpolar North Atlantic, where Fe stressed conditions have recently been demonstrated. Derived values of C-effx from across the region, including areas subject to atypical external Fe fertilization events during the year of sample collection (2010), ranged from 17 to 19 kmol C (mol Fe-1). Comparing these estimates with values from other systems, considered in the context of variable bloom durations in the different oceanographic...
Tipo: Text
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00290/40112/39249.pdf

RNO. Imposex-TBT. La pollution par les organo-stanniques le long des côtes francaises, de la Manche et de l'Atlantique. Novembre 2003
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Huet, Martial; Michel, Pierre; Averty, Bernard; Paulet, Yves Marie.
Tipo: Text
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00315/42572/41942.pdf

Systèmes agraires et systèmes halieutiques : des enseignements réciproques
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rey, Hélène; Catanzano, Joseph; Durand, L.
This document aims at presenting the way in wich the application of the systems-oriented research to the new sector of fisheries was based on the farming systems research developed in agriculture. It also shows that the characteristics of this fields are an opportunity to realize a methodological progress for the traditional fields of rural development, since the latter is tributary of the environmental dimension.
Tipo: Text
Palavras-chave: SEM.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/1994/acte-2433.pdf

Avis sur l'épandage agricole des boues de station d'épuration d'eaux usées dans l'Ile de Ré
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sauvagnargues, Jean-claude.
Tipo: Text
Ano: 1987
URL: https://archimer.ifremer.fr/doc/00136/24690/22739.pdf

Capacity of the potentially toxic diatoms Pseudo-nitzschia mannii and Pseudo-nitzschia hasleana to tolerate polycyclic aromatic hydrocarbons
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ben Garali, Sondes Melliti; Sahraoui, Ines; Ben Othman, Hiba; Kouki, Abdessalem; De La Iglesia, Pablo; Diogene, Jorge; Lafabrie, Celine; Andree, Karl B.; Fernandez-tejedor, Margarita; Mejri, Kaouther; Meddeb, Marouan; Pringault, Olivier; Hlaili, Asma Sakka.
This study investigates the effects of polycyclic aromatic hydrocarbons (PAHs) on two potentially toxic Pseudonitzschia hasleana and P. mannii, isolated from a PAH contaminated marine environment. Both species, maintained in non-axenic cultures, have been exposed during 144 h to increasing concentrations of a 15 PAHs mixture. Analysis of the domoic acid, showed very low concentrations. Dose?response curves for growth and photosynthesis inhibition were determined. Both species have maintained their growth until the end of incubation even at the highest concentration tested (120 ?g l-1), Nevertheless, P mannii showed faster growth and seemed to be more tolerant than P. hasleana. To reduce PAH toxicity, both species have enhanced their biovolume, with a...
Tipo: Text
Palavras-chave: Diatoms; Pseudo-nitzschia; PAHs mixtures; Biodegradation; Eco-toxicology.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00690/80215/83300.pdf

Rapport sur l'activité du Laboratoire de La Tremblade - Année 1962
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Trochon, Pierre.
Rapport sur l'activité du Laboratoire de La Tremblade concernant l'année 1962
Tipo: Text
Palavras-chave: Rapport activité; Conchyliculture; Hydrologie; Mortalité; Météorologie; Reproduction; Claire ostréicole; Crassostrea angulata; Ostrea edulis; Mytilus edulis; Marennes Oléron.
Ano: 1962
URL: http://archimer.ifremer.fr/doc/00069/18060/15604.pdf

Observations relatives à une expérience de reproduction artificielle des huîtres du Pacifique (Crassostrea gigas Thunberg)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Comps, Michel.
The artificial production of oyster spats in Japan and the USA provided inspiration to some French oyster farmers who thought that, at a time when stocking up Crassostrea gigas spats was getting more difficult, it would be interesting to try out the nutrition techniques developed by Japanese and American specialists. In this way, in La Tremblade, in the Marennes basin, M. Paul Jarno set up some structures aimed at artificial oyster reproduction. Trials started in 1968 and continued in July 1969. The first step was to assess the material and structures' usability and to take a closer look at the practical larval nutrition conditions in order to obtain fixed spats. This document is a collection of the observations carried out during the different trials.
Tipo: Text
Palavras-chave: Reproduction artificielle; Larves; Naissain; Reproduction; Crassostrea gigas; Huître.
Ano: 1970
URL: http://archimer.ifremer.fr/doc/1970/publication-6285.PDF

Nitrogen isotope variations in the northern South China Sea since marine isotopic stage 3: reconstructed from foraminifera-bound and bulk sedimentary nitrogen
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Wang, Tingting; Ravelo, Ana Christina; Ren, Haojia; Dang, Haowen; Jin, Haiyan; Liu, Jingjing; Jian, Zhimin.
We report the differences between δ15N of organic nitrogen bound in foraminifera tests (foraminifera‐bound δ15N, or FB‐δ15N), which is considered an effective recorder of thermocline nitrate δ15N in the oligotrophic areas, and bulk sedimentary δ15N (δ15Nbulk) of core MD12‐3433, located in the northern South China Sea (SCS), to explore possible causes of the offset between these two proxies in the SCS. The offset can be best explained by the influence of the terrigenous input on δ15Nbulk, as evidenced by its general correlation with sea level changes, C:N ratios, and inorganic nitrogen contribution to total nitrogen. Moreover, our new record is compared to six previously published δ15Nbulk records of the SCS based on their geographical proximity to the...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00441/55238/56719.pdf

Spatial distribution of foraging in female Antarctic fur seals Arctocephalus gazella in relation to oceanographic variables: a scale-dependent approach using geographic information systems
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guinet, Christophe; Dubroca, L; Lea, Ma; Goldsworthy, S; Cherel, Yan; Duhamel, Guy; Bonadonna, F; Donnay, Jp.
The distribution of foraging activity for female Antarctic fur seals was investigated at Cap Noir (49 degrees 07 'S, 70 degrees 45 'E), Kerguelen Island in February 1998. Eleven females were fitted with a satellite transmitter and time-depth recorder. The 2 data sets were combined in order to locate diving activity of the seals. The occurrence of fish in the diet of the seals was investigated by the identification of otoliths in 55 scats collected at the breeding colony during the study period. Oceanographic variables were measured simultaneously by direct sampling and satellite remote sensing. The mesopelagic fish community was sampled at 20 stations along 4 transects, where epipelagic trawls were conducted at night at 50 ni depth. We then investigated,...
Tipo: Text
Palavras-chave: Antarctic fur seal; Diet; Oceanographic conditions; Foraging; Geographic information system.
Ano: 2001
URL: https://archimer.ifremer.fr/doc/00247/35843/34354.pdf

High genetic diversity of     Vibrio cholerae     in the European lake Neusiedler See is associated with intensive recombination in the reed habitat and the long-distance transfer of strains
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pretzer, Carina; Druzhinina, Irina S.; Amaro, Carmen; Benediktsdottir, Eva; Hedenstroem, Ingela; Hervio-heath, Dominique; Huhulescu, Steliana; Schets, Franciska M.; Farnleitner, Andreas H.; Kirschner, Alexander K. T.
Coastal marine Vibrio cholerae populations usually exhibit high genetic diversity. To assess the genetic diversity of abundant V. cholerae non-O1/non-O139 populations in the Central European lake Neusiedler See, we performed a phylogenetic analysis based on recA, toxR, gyrB and pyrH loci sequenced for 472 strains. The strains were isolated from three ecologically different habitats in a lake that is a hot-spot of migrating birds and an important bathing water. We also analyzed 76 environmental and human V. cholerae non-O1/non-O139 isolates from Austria and other European countries and added sequences of seven genome-sequenced strains. Phylogenetic analysis showed that the lake supports a unique endemic diversity of V. cholerae that is particularly rich in...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00366/47756/47802.pdf

L'hydrologie algérienne en hiver (Campagne du « Président-Théodore-Tissier », février 1960)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Furnestin, Jean; Allain, Charles.
The examination of hydrological conditions in Algerian-Tunisian waters in the winter (January 1960) revealed the relationships between the different water formations that we described in other regions of the western Mediterranean Sea in the summer of 1957 and in the autumn of 1958....
Tipo: Text
Ano: 1962
URL: http://archimer.ifremer.fr/doc/1962/publication-4187.pdf

Fonctionnements et usages d'une Archive Institutionnelle
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Merceur, Frederic.
En Août 2005, l'Ifremer lançait Archimer, son archive institutionnelle. Archimer propose aujourd'hui plus de 3700 documents accessibles librement sur Internet dont plus de 80% des publications co-rédigées par l'Ifremer depuis la création de l'archive.   Après un rappel des modalités de collecte et d'enregistrement des publications, ce document présente un bilan de l'utilisation d'Archimer. Il analyse notamment la progression du nombre de consultations et les différences constatées entre les usages des différents types de travaux (publications, thèses, rapports...).   Cette étude met également en évidence la prédominance du moteur de recherche Google pour accéder aux documents et souligne les implications en terme de visibilité sur Internet.
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/rapport-4632.pdf

Observations sur le hareng du sud de la Mer du Nord et de la Manche Orientale (Campagnes d'hiver 1960-61 et 1961-62)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ancellin, Jacques.
Les chalutiers industriels de 300/500 tx ont travaillé sur le Vergoyer et le Sandettié pendant la deuxième quinzaine de novembre ; la pêche s'est poursuivie sur le Sandettié jusqu'à la mi-décembre. La région de l'Ailly a été exploitée pendant une quinzaine de jours, de la fin de novembre au début de décembre.
Tipo: Text
Ano: 1962
URL: http://archimer.ifremer.fr/doc/1962/publication-7052.pdf

Sr‐Nd‐Hf isotopes along the Pacific Antarctic Ridge from 41 to 53°S
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hamelin, Cedric; Dosso, Laure; Hanan, Barry; Barrat, Jean-alix; Ondreas, Helene.
Major, trace element and Sr-Nd-Hf isotope data in basalts collected along the Pacific-Antarctic Ridge ( PAR) axis between 53 and 41 S, far from any hotspot influence, reveal tight coherent geochemical variations within the depleted MORB mantle. All samples are located below the Pacific reference line defining two sub-oceanic mantle domains on each side of the Easter microplate. The data extend the PAR 66-53 S field towards more radiogenic Sr (0.70264), less radiogenic Nd (epsilon = 7.7) and Hf (epsilon = 11.4) values. The along ridge geochemical variability is closely related to the morphological segmentation of the ridge. Anomalous geochemical features are attributed to the atypical morphology of two segments due to the presence of off-axis magmatism. The...
Tipo: Text
Palavras-chave: Pacific-Antarctic; Depleted mantle; Sr-Nd-Hf isotopes.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00004/11526/8123.pdf

Effects of spawning patterns and larval mortality on survival to the juvenile stage : a modelling analysis on the anchovy population of the Bay of Biscay
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Huret, Martin; Petitgas, Pierre; Struski, Caroline.
Fish populations show complex life cycles with successive dependent life stages, the spatio-temporal patterns of distribution at one stage impacting distribution, growth and mortality during the next stage. Here we propose to assess the relative effect of spawning (timing, duration, fecundity and spatial distribution, resulting from adult environmental conditions over autumn and winter) and larval mortality on the resulting survival at the age of metamorphosis. We used a suite of models run sequentially : a coupled physical-biogeochemical model to provide the environmental forcing, a Dynamic Energy Budget (DEB) model for adult fish growth and reproduction (spawning timing, duration and fecundity), an Individual Based Model (IBM) for larval drift, growth...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00023/13451/10464.pdf

Polyploïdisation chez les mollusques bivalves : techniques d'obtention, performances des produits obtenus - Première partie : maîtrise des techniques de polyploïdisation application aux espèces d'intérêt commercial en France (Huîtres creuses et palourdes)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gerard, Andre.
Following the development of the hatchery tool, different triploidy induction techniques have been tried out in vitro. The method using cytochalasin B was selected and successfully applied to cupped oysters, Crassostrea gigas and especially to clams, Ruditapes philippinarum. Larval survival rates were lower than control rates. On the other hand, larvae's growth speed was comparable. These methods will now be used to produce significant test populations which will then be cultivated in French coastal waters.
Tipo: Text
Palavras-chave: Palourdes; Huîtres creuses; Polyploïdisation; Conchyliculture.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/1990/rapport-3853.PDF

How twist can affect braided marine ropes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Davies, Peter; O'Hear, Nick.
Traditionally synthetic fiber ropes based on nylon and polyester fibers have been widely used in the marine industry. In recent years, as the offshore petroleum industry has moved to depths beyond 1000 meters, these have attracted more attention for both mooring and deep sea handling, and high performance ropes (high modulus polyethylenes (HMPE), aramids) are also being studied. Ocean energy converters will also require mooring systems with long term reliability. Following pioneering work by Petrobras large polyester fiber ropes are now being used in station keeping of floating platforms off Brazil and in the Gulf of Mexico [1]. This application followed extensive development projects and sea trials, and has resulted in a large database of tensile...
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-7327.pdf

Physical and chemical factors influencing species distributions on hydrothermal sulfide edifices of the Juan de Fuca Ridge, northeast Pacific
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sarrazin, Jozee; Juniper, Sk; Massoth, G; Legendre, P.
This study examines relationships between hydrothermal vent species and their surrounding physical and chemical environment on 2 high-temperature sulfide edifices of the Juan de Fuca Ridge (northeast Pacific). Video imagery and in situ temperature and chemical information were acquired during 2 remotely operated vehicle (ROV) dive programs in 1993 and 1995, for a total of 78 scans. Statistical analyses of environmental and faunal data reveal a heterogeneous distribution (cor respondence analyses) of hydrothermal species and demonstrate a significant influence of local physical and chemical conditions on species distributions (canonical correspondence analyses). Results confirm the importance of hydrogen sulfide to the distribution of vent species as well...
Tipo: Text
Palavras-chave: Hydrothermal vent ecology; Physical and chemical factors; In situ measurements; Habitat characterization; Species distribution; Sulfide edifice; Statistical analyses; Fluid flow; Substratum types; Mosaic habitat.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00280/39113/37666.pdf

Molecular epidemiology of Vibrio nigripulchritudo, a pathogen of cultured penaeid shrimp (Litopenaeus stylirostris) in New Caledonia
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Goarant, Cyrille; Reynaud, Yann; Ansquer, Dominique; De Decker, Sophie; Saulnier, Denis; Leroux, Frederique.
A collection of 57 isolates of Vibrio nigripulchritudo from either diseased or healthy shrimp and from shrimp farms environment was studied in order to gain a better understanding of the epidemiology of this pathogen, notably isolated from two distinct shrimp disease complexes. Molecular typing using two different techniques, arbitrarily primed PCR (AP-PCR) and multi-locus sequence typing (MLST), studied together with experimental pathology data allowed a relevant epidemiological insight into this possibly emerging pathogen. Additionally, results obtained with the two molecular typing techniques were congruent and allowed discriminating the strains associated with the "Summer Syndrome" from strains isolated from other contexts, especially the other shrimp...
Tipo: Text
Palavras-chave: Virulence; Epidemiology; Typing; MLST; AP PCR; Mariculture; Vibriosis.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1913.pdf

Influence of Tropical Instability Waves on Phytoplankton Biomass near the Marquesas Islands
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Martinez, Elodie; Raapoto, Hirohiti; Maes, Christophe; Maamaatuaihutapu, Keitapu.
The Marquesas form an isolated group of small islands in the Central South Pacific where quasi-permanent biological activity is observed. During La Niña events, this biological activity, shown by a net increase of chlorophyll-a concentration (Chl, a proxy of phytoplankton biomass), is particularly strong. It has been hypothesized that this strong activity is due to iron-rich waters advected from the equatorial region to the Marquesas by tropical instability waves (TIWs). Here we investigate this hypothesis over 18 years by combining satellite observations, re-analyses of ocean data, and Lagrangian diagnostics. Four La Niña events ranging from moderate to strong intensity occurred during this period, and our results show that the Chl plume within the...
Tipo: Text
Palavras-chave: Tropical instability waves; La Nina; Chlorophyll-a concentration variability; Ocean colour; Island mass effect; Marquesas islands; Oceanography; Satellite observations.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00437/54858/56346.pdf

Length based catch analysis for east Atlantic Mediterranean bluefin tuna
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kell, Laurence T; Bonhommeau, Sylvain; Fromentin, Jean-marc.
Although the bluefin assessment is based on catch-at-age data, ageing using hard parts is an expensive and d{fficult process. Therefore length data are converted into age for bluefin using a growth curve, i.e. age slicing. Where age is predicted from length using the inverse of the von Bertalanffy growth curve. Here we show how a simple method based on length data alone can be used to estimate population parameters such as total mortality (Z).
Tipo: Text
Palavras-chave: Bluefin; Catch curve analysis; Growth; Length; Mortality.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00191/30274/28734.pdf

Subtidal Microphytobenthos: A Secret Garden Stimulated by the Engineer Species Crepidula fornicata
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Androuin, Thibault; Polerecky, Lubos; Decottignies, Priscilla; Dubois, Stanislas; Dupuy, Christine; Hubas, Cedric; Jesus, Bruno; Le Gall, Erwan; Marzloff, Martin; Carlier, Antoine.
The slipper limpet Crepidula fornicata is an emblematic invasive species along the northeast Atlantic coast. This gregarious gastropod lives in stacks of several individuals and forms extended beds in shallow subtidal areas. The effects of this engineer species on the colonized habitat can be physical (e.g., presence of hard-shell substrates with uneven topography) or biological (e.g., nutrient enrichment by direct excretion or via biodeposition). We hypothesized that through biological activity, nutrient fluxes at the sediment-water interface are enhanced, leading to stimulated primary productivity by microphytobenthos (MPB) associated with Crepidula beds. To test this fertilization hypothesis, we conducted a 10-day mesocosm experiment using C. fornicata...
Tipo: Text
Palavras-chave: Crepidula fornicata; Engineer species; Subtidal microphytobenthos; Fertilization; Hyperspectral imaging.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00472/58338/60893.pdf

The European Landing Obligation. Reducing Discards in Complex, Multi-Species and Multi-Jurisdictional Fisheries
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Uhlmann, Sven Sebastian; Ulrich, Clara; Kennelly, Steven J.
This open access book provides a comprehensive examination of the European Landing Obligation policy from many relevant perspectives. It includes evaluations of its impacts at economical, socio-cultural, ecological and institutional levels. It also discusses the feasibility and benefits of several potential mitigation strategies. The book was timely published, exactly at the time where the Landing Obligation was planned to be fully implemented. This book is of significant interest to all stakeholders involved, but also to the general public of Europe and to other jurisdictions throughout the world that are also searching for ways to deal with by-catch and discard issues.
Tipo: Text
Palavras-chave: Discard; Fish By-catch; Marine spatial planning; European waters; Landing obligation; Ecosystems; Fish stocks; NGO; Fisheries policy; MINOUW; DiscardLess; Open Access.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00589/70084/68066.pdf

Agonistic behaviour and feed efficiency in juvenile Nile tilapia Oreochromis niloticus
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: De Verdal, Hugues; O'Connell, Catherine Maeve; Mekkawy, Wagdy; Vandeputte, Marc; Chatain, Beatrice; Bégout, Marie-laure; Benzie, John A.h.
Given the strong effects of behavioural hierarchies on growth in many cultured species and the key role of feed efficiency in aquaculture economics, understanding the nature of the interaction of these variables is important for the sustainability of aquaculture. The relationship between agonistic behaviour, growth and feed efficiency in Nile tilapia, Oreochromis niloticus, was studied by rearing 120 fish in eight aquaria. Fish were video-recorded to estimate the occurrence of agonistic behaviour during a fasting and a refeeding period. Growth, feed intake and feed conversion efficiency (FCE - calculated as the inverse of feed conversion ratio (FCR)) were subsequently measured individually for each fish. Fish showed 58% less agonistic traits during the...
Tipo: Text
Palavras-chave: Agonstic behaviour; Feed efficiency; Nile tilapia; Performances; Correlation.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00483/59495/62363.pdf

Temperature and salinity fields in the north patagonian gulfs
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rivas, Al; Beier, Ej.
Tipo: Text
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00103/21389/18987.pdf

Eutrophication: A new wine in an old bottle?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Moal, Morgane; Gascuel-odoux, Chantal; Menesguen, Alain; Souchon, Yves; Etrillard, Claire; Levain, Alix; Moatar, Florentina; Pannard, Alexandrine; Souchu, Philippe; Lefebvre, Alain; Pinay, Gilles.
Eutrophication is one of the most common causes of water quality impairment of inland and marine waters. Its best-known manifestations are toxic cyanobacteria blooms in lakes and waterways and proliferations of green macro algae in coastal areas. The term eutrophication is used by both the scientific community and public policy-makers, and therefore has a myriad of definitions. The introduction by the public authorities of regulations to limit eutrophication is a source of tension and debate on the activities identified as contributing or having contributed decisively to these phenomena. Debates on the identification of the driving factors and risk levels of eutrophication, seeking to guide public policies, have led the ministries in charge of the...
Tipo: Text
Palavras-chave: Eutrophication; Nitrogen; Phosphorus; Algae bloom; Land-sea continuum; Diffuse pollution.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00456/56734/58551.pdf

Mise en evidence et evaluation de l'enrichissement bacterien du film de surface des eaux littorales d'effluents urbains
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Beucher, M; Plusquellec, A; Legal, Y; Cleret, J.
Sea water samples were collected in the vicinity of urban non-treated, urban treated and industrial outfalls. The samples belonged to two differents types: the first one consisted of the surface film, the second was the corresponding water at 50 cm depth. The enumeration of the bacteria in both types of samples indicated a significant concentration of the mesophilic flora and of the indicators of fecal pollution in the surface film. The value of the concentrating factor depended largely on the nature of the sewage and did not reflect differences between the various bacterial groups. At one of the stations a very significant regression was demonstrated between surface sample and depth sample.
Tipo: Text
Palavras-chave: Bacteria; Bacteriology; Bacterial counters; Industrial wastes; Pollution indicators; Coastal waters; Microbial contamination; Indicator species; Sewage; Outfalls; Surface films.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-1006.pdf

Variation in synonymous codon use and DNA polymorphism within the Drosophila genome
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bierne, Nicolas; Eyre Walker, A.
A strong negative correlation between the rate of amino-acid substitution and codon usage bias in Drosophila has been attributed to interference between positive selection at nonsynonymous sites and weak selection on codon usage. To further explore this possibility we have investigated polymorphism and divergence at three kinds of sites: synonymous, nonsynonymous and intronic in relation to codon bias in D. melanogaster and D. simulans. We confirmed that protein evolution is one of the main explicative parameters for interlocus codon bias variation (r(2) similar to 40%). However, intron or synonymous diversities, which could have been expected to be good indicators of local interference [here defined as the additional increase of drift due to selection on...
Tipo: Text
Palavras-chave: Substitution rate; Selective constraints; Linkage; Hill Robertson interference; GC content; Drosophila; Diversity; Codon usage.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-4221.pdf

Radiocarbon age offsets of foraminifera resulting from differential dissolution and fragmentation within the sedimentary bioturbated zone
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Barker, Stephen; Broecker, Wallace; Clark, Elizabeth; Hajdas, Irka.
Shells of coexisting species of planktonic foraminifera from the Ontong Java Plateau reveal radiocarbon age offsets of up to 2200 years. Similar offsets are found between fragments and whole shells of single species. Steady state modelling of dissolution and bioturbation within the sedimentary mixed layer predicts age differences of up to several kiloyears due to the interplay between differential dissolution and fragmentation of foraminifer shells and bioturbation. The observation that fragile foraminiferal shells are systematically older than those of more robust species is more difficult to explain. Mechanisms of chemical erosion, interface dissolution, and sediment redistribution are all apparently unable to explain this phenomenon. A possible solution...
Tipo: Text
Palavras-chave: Adiocarbon dating; Dissolution; Fragmentation.
Ano: 2007
URL: https://archimer.ifremer.fr/doc/00238/34943/33247.pdf

Downsizing and Silicon Integration of Photoacoustic Gas Cells
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gliere, Alain; Barritault, Pierre; Berthelot, Audrey; Constancias, Christophe; Coutard, Jean-guillaume; Deslosges, Brigitte; Durrafourg, Laurent; Fedeli, Jean-marc; Garcia, Marine; Lartigue, Olivier; Lhermet, Hélène; Marchant, Adrien; Rouxel, Justin; Skubich, Jules; Teulle, Alexandre; Verdot, Thierry; Nicoletti, Sergio.
Downsizing and compatibility with MEMS silicon foundries is an attractive path towards a large diffusion of photoacoustic trace gas sensors. As the photoacoustic signal scales inversely with the chamber volume, a trend to miniaturization has been followed by several teams. We review in this article the approach initiated several years ago in our laboratory. Three generations of components, namely a 40 mm3 3D-printed cell, a 3.7 mm3 silicon cell, and a 2.3 mm3 silicon cell with a built-in piezoresistive pressure sensor, have been designed. The models used take into account the viscous and thermal losses, which cannot be neglected for such small-sized resonators. The components have been fabricated either by additive manufacturing or microfabrication and...
Tipo: Text
Palavras-chave: MEMS; Photoacoustic spectroscopy; Silicon integration; Trace gas measurements.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00600/71210/69571.pdf

Determination of trace elements in seawater by ICP-SFMS after Tm addition and co-precipitation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Freslon, Nicolas; Bayon, Germain; Birot, Dominique; Bollinger, C.; Barrat, J. A.
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00023/13411/10486.pdf

Competition for food reduces disease susceptibility in a marine invertebrate
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pernet, Fabrice; Lugue, Klervi; Petton, Bruno.
Competition between organisms interfere in host and pathogen dynamics in ways that are difficult to predict. By one side, competitors can reduce the food supply and cause nutritional stress. Such stress could further modulate the susceptibility to infection by altering immune response or metabolic rate of the host. Alternatively, competitors may trap pathogens before they reach the focal host, and therefore reduce, enhance, or have no effect on infection according to the competitor's susceptibility to the infection. To better understand how competition influences host and pathogen interactions, we experimentally assessed the relative importance of competition for pathogens and resources on the severity of a viral disease infecting the Pacific oyster...
Tipo: Text
Palavras-chave: Competition; Crassostrea gigas; Disease ecology; Filtration; Ostreid herpesvirus 1; Pathogen.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00692/80375/83493.pdf

Observations sur la production du naissain dans le bassin d'Arcachon en 1936
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Borde, F.
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1937
URL: http://archimer.ifremer.fr/doc/1937/publication-5749.pdf

Les essais mécaniques a la DCN, de l'eprouvette aux structures
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hoarau, P.
In order to correctly dimension surface ship hulls made of organic matrix composites, the DCN carries out different kinds of mechanical testing: Quasi-static and dynamic. Sample size varies from small scale (for material selection) to large scale (for the choice of assembling technology between deck and hull). As often as possible, the DCN performs correlation studies between its experiments and existing numerical tools, in order to improve the accuracy of computer modelling.
Tipo: Text
Palavras-chave: Tests; Materials testing; Ship technology; Composite materials; Essai sur tronçon; Essai mécanique; Structure sandwich; Matériau composite.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-1083.pdf

Molecular detection of betanodavirus from the farmed fish, Platax orbicularis (Forsskal) (Ephippidae), in French Polynesia
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: David, R.; Treguier, Cathy; Montagnani, Caroline; Belliard, Corinne; Levy, Peva; Nedelec, Georges; Joufoques, Vaiana; Remoissenet, G.; Gueguen, Yannick; Cochennec-laureau, Nathalie.
Tipo: Text
Palavras-chave: Betanodavirus; Detection; French Polynesia; Genotype; Platax orbicularis.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00003/11380/7972.pdf

Seismic stratigraphy and glacial cycles in the inland passages of the Magallanes Region of Chile, southernmost South America
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fernandez, Rodrigo; Gulick, Sean; Rodrigo, Cristian; Domack, Eugene; Leventer, Amy.
We present results of a marine geophysical survey that imaged submarine sedimentary and geomorphic features of the main inland channels of the Magallanes Region of Chile, in southernmost South America. This region holds a remarkable terrestrial and marine record of glacial variations in the closest landmass to Antarctica. We report evidence for grounded ice along the main channels associated with two ice lobes that flowed from Cordillera Darwin, part of the Austral Andes, into Central Estrecho de Magallanes and Seno Almirantazgo. Multibeam data show drumlins and glacial lineations in Whiteside Channel the northern continuation of Seno Almirantazgo, and iceberg plough marks in Central Estrecho de Magallanes. Multichannel seismic data show a complex array of...
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00420/53166/55263.pdf

The silicon isotope composition of Ethmodiscus rex laminated diatom mats from the tropical West Pacific: Implications for silicate cycling during the Last Glacial Maximum
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Xiong, Zhifang; Li, Tiegang; Algeo, Thomas; Doering, Kristin; Frank, Martin; Brzezinski, Mark A.; Chang, Fengming; Opfergelt, Sophie; Crosta, Xavier; Jiang, Fuqing; Wan, Shiming; Zhai, Bin.
The cause of massive blooms of Ethmodiscus rex laminated diatom mats (LDMs) in the eastern Philippine Sea (EPS) during the Last Glacial Maximum (LGM) remains uncertain. In order to better understand the mechanism of formation of E. rex LDMs from the perspective of dissolved silicon (DSi) utilization, we determined the silicon isotopic composition of single E. rex diatom frustules (delta Si-30(E.rex)) from two sediment cores in the Parece Vela Basin of the EPS. In the study cores, delta Si-30(E.rex) varies from -1.23 parts per thousand to -0.83 parts per thousand (average -1.04 parts per thousand), a range that is atypical of marine diatom delta Si-30 and that corresponds to the lower limit of reported diatom delta Si-30 values of any age. A binary mixing...
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00496/60732/65231.pdf

Activité des navires de pêche 2017 : région Normandie
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: SIH. Système d'Informations Halieutiques de l'Ifremer.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public.
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00490/60163/63507.pdf

Les pycnogonides de la croisière 1951 du « Président Théodore Tissier »
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bourdillon, A.
The 1951 cruise of the "Président-Théodore-Tissier" was conducted from February 13th to June 30th, 1951. During these four and a half months, the vessel, which departed from Brest, stopped successively in Madeira, the French Caribbean, the Bermudas, Woods Hole, Halifax, on the banks of Newfoundland, the Azores Islands, Saint-Jean-de-Luz, and then sailed back to Brest after 13,000 miles in the Northern Atlantic Ocean. The North-Western Atlantic and the Caribbean Pycnogonida have been the focus in 1948 of a very comprehensive and documented review by J. W. Hedgpeth followed by a catalogue of the stations of the different expeditions which worked in the Northern Atlantic Ocean and the studied species. Moreover, the work of Marcus (1940) on the South-American...
Tipo: Text
Ano: 1955
URL: http://archimer.ifremer.fr/doc/1955/publication-6612.pdf

Inertial currents in the Indian Ocean derived from satellite tracked surface drifters
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Saji, P. Kuttan; Shenoi, Satheesh C.; Almeida, Anselm; Rao, Gangadhara.
Satellite-tracked surface drifters were used to analyze the characteristics of inertial currents in the tropical Indian Ocean. The drifters were drogued at 15 m depth and had wind-produced slips less than 0.1 % of the wind speed. The rotary spectra of surface velocity components indicated the significance of inertial currents. They are circular (rotary coefficient &gt; 0.5), highly intermittent and contribute up to 46 % to the total kinetic energy of the surface flow field. Events of inertial activity, either triggered by the passage of atmospheric disturbances or by the local fluctuations in the atmospheric pressure (winds), did not last for more than 4 to 5 inertial cycles. The observed inertial frequency exhibited a shift towards the red end of the...
Tipo: Text
Palavras-chave: Courant d’inertie; Flotteurs de surface; Ocean Indien; Inertial current; Drifting buoy; Indian Ocean.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00323/43386/42825.pdf

Radar observations of ship-induced instabilities in the ocean-atmosphere system
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Smirnov, Av.
Both natural and artificial (ship-induced) features of atmospheric motions can be seen in ocean radar imagery. Observations of a surface wake extending downstream from the atmospheric vortices in a thermal ship plume are described. To demonstrate the usefulness of radar systems in observing the ocean surface, we studied the behavior of hot ship exhaust, using a 2.25-cm-wavelength airborne radar. The ship-induced feature in the polarimetric radar images was observed in the ocean surface cold environment with moderate horizontal ambient winds. The smoke-like feature appears only in the vertically-polarized images, and not in the horizontally-polarized images.
Tipo: Text
Palavras-chave: Imagerie radar; Polarisation; Sillage d'un navire; Vorticité atmosphérique; Panache thermique; Radar images; Polarization; Ship track; Atmospheric vorticity; Thermal plume.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00325/43627/43256.pdf

Bilan final 2004-2007 du Réseau de Veille Zoosanitaire REPANUI des huîtres perlières Pinctada margaritifera en Polynésie francaise
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Saugeon, Cecile; Fougerouse, Angelique; Pellan, Antoine; Levy, Peva; Cochennec-laureau, Nathalie.
De nombreuses pathologies affectent les mollusques, dont les huîtres perlières. Celles-ci peuvent être sensibles à des maladies, ce qui peut entraîner parfois de fortes mortalités au sein d’une population. La présence de certains agents pathogènes dans la région Asie-Pacifique ainsi que les fortes mortalités dans les années 1985 sur le cheptel de Pinctada margaritifera en Polynésie française, permet de se rendre compte de la vulnérabilité de la filière perlicole.  De part l’importance socio-économique de la perliculture en Polynésie française, le Service de la Perliculture, en collaboration avec l’Ifremer de Tahiti, a mis en place en 2003 un réseau de surveillance épidémiologique des pathologies de l’huître perlière P. margaritifera (REPANUI). Après cinq...
Tipo: Text
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00168/27883/26137.pdf

Marine mineral occurrences and deposits of the economic exclusive zones. Marmin a database
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lenoble, J.p.; Augris, Claude; Cambon, Régis; Saget, Philippe.
The Marmin database inventories the mineral prospects and deposits, primarily those in the exclusive economic zone (EEZ). The database offers a review of the variety of potential sites for exploration and development of sub-marine mineral resources.
Tipo: Text
Ano: 1995
URL: http://archimer.ifremer.fr/doc/1995/rapport-4285.pdf

Morphological predictors of slaughter yields using 3D digitizer and their use in a common carp breeding program
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Prchal, Martin; Kocour, Martin; Vandeputte, Marc; Kause, Antti; Vergnet, Alain; Zhao, Jinfeng; Gela, David; Kašpar, Vojtěch; Genestout, Lucie; Bestin, Anastasia; Haffray, Pierrick; Bugeon, Jérôme.
Slaughter yields are traits of high interest especially for fish species sold in processed form like headless carcass or fillets, as well as with regard to increasing consumer preference for easy-to-prepare fish products. However, slaughter yields cannot be measured on live fish and thus their genetic improvement through mass selection is impossible. The usual alternatives are sib selection and/or indirect selection on correlated traits or morphological predictors of slaughter yields. In the present study, we assessed the possibility of using a combination of 3D digitized landmarks and ultrasound measurements in genetic improvement of slaughter yields in common carp. DNA – pedigreed market-size carp (n = 1553 fish) were produced from a partial factorial...
Tipo: Text
Palavras-chave: Fillet yields; 3D predictors; Genetic parameters; Indirect selection; Breeding program.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00604/71625/70070.pdf

Projected decreases in future marine export production: the role of the carbon flux through the upper ocean ecosystem
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Laufkotter, Charlotte; Vogt, Meike; Gruber, Nicolas; Aumont, Olivier; Bopp, Laurent; Doney, Scott C.; Dunne, John P.; Hauck, Judith; John, Jasmin G.; Lima, Ivan D.; Seferian, Roland; Volker, Christoph.
Accurate projections of marine particle export production (EP) are crucial for predicting the response of the marine carbon cycle to climate change, yet models show a wide range in both global EP and their responses to climate change. This is, in part, due to EP being the net result of a series of processes, starting with net primary production (NPP) in the sunlit upper ocean, followed by the formation of particulate organic matter and the subsequent sinking and remineralisation of these particles, with each of these processes responding differently to changes in environmental conditions. Here, we compare future projections in EP over the 21st century, generated by four marine ecosystem models under the high emission scenario Representative Concentration...
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00600/71205/69576.pdf

Marges actives : Pérou et autres exemples
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pautot, Guy.
New oceanographic data enable us to precise the geological phenomena linked to the convergence zones of two lithospheric plates. Taking into example the Peruvian continental margin, the subduction phenomenon of the Nazca plate under the South-American plate can be tackled. This subduction occurs in the domain which is immersed by seisms, volcanism, magmatism and tectonics. We present the geophysical and sedimentological data specific to the oceanic domain of the Nazca plate and follow its evolution as it reaches the Peruvian margin. Up until the Peruvian fault, the analysis is relatively easy.
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1975
URL: http://archimer.ifremer.fr/doc/1975/publication-5083.pdf

L'information economique et les besoins de la politique economique et de la gestion du secteur des peches et cultures marines
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Weber, Jacques; Lantz, Frederic.
This document is written for and at the request of the Central Committee of Maritime Fishing. Yet it is also addressed to regional institutions, several of which would like to equip themselves with an economic monitor. In his "report on the modernisation of the Interprofessional Organisation of Fishing and Marine Farming", the president of the CCPM makes the development of economic information one of the main principles of reform. At the same time, a growing number of regional authorities wish to equip themselves with economic monitors, with the concern of controlling the management and future of their sector of fishing and marine farming. The two problems are similar insomuch as:   (i) it is a matter, in both cases, of responding to the same questions:  -...
Tipo: Text
Palavras-chave: SEM.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/rapport-2477.pdf

Une évaluation des performances économiques de la pêche côtière : le cas de la région Bretagne
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Floc H, Pascal; Thebaud, Olivier; Boncoeur, Jean; Daures, Fabienne; Guyader, Olivier.
Fishing activities have a significant role in socio-economic base for a few coastal areas. In this respect, fleets operating mainly in coastal fisheries deserve a special interest due to their narrow links with the home base. However, coastal fleet activities are not very known, restricting the capacity to deliver a diagnosis on their economic viability. This article suggests an assessment of the influence and the economic performance of the coastal fleets in Brittany. Results show similar economic performances for coastal units compared to offshore units. Furthermore, coastal units own additional advantages in relation to their energy consumption and capacity to operate without public subsidies. However, there are vulnerable to fishing effort of offshore...
Tipo: Text
Palavras-chave: Pêche côtière; Performance économique; Dépendance énergétique; Mesures de gestion; Coastal fishery; Economic performance; Energy dependency; Management measures.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00243/35421/33958.pdf

Global determinants of freshwater and marine fish genetic diversity
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Manel, Stéphanie; Guerin, Pierre-edouard; Mouillot, David; Blanchet, Simon; Velez, Laure; Albouy, Camille; Pellissier, Loïc.
Genetic diversity is estimated to be declining faster than species diversity under escalating threats, but its spatial distribution remains poorly documented at the global scale. Theory predicts that similar processes should foster congruent spatial patterns of genetic and species diversity, but empirical studies are scarce. Using a mined database of 50,588 georeferenced mitochondrial DNA barcode sequences (COI) for 3,815 marine and 1,611 freshwater fish species respectively, we examined the correlation between genetic diversity and species diversity and their global distributions in relation to climate and geography. Genetic diversity showed a clear spatial organisation, but a weak association with species diversity for both marine and freshwater species....
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00609/72076/70788.pdf

Etude des "possibilités de développement de la conchyliculture en Basse-Normandie dans les sites de : Baie des Veys, Havres de Lessay, Geffosses et Regneville, et littoral de Champeaux". Rapport général de la 1ère année
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Bouteiller, M.; Miossec, Dominique.
L'étude faisant l'objet du présent rapport a été entreprise à la demande de l’Établissement Public de Basse-Normandie à Caen et de la Direction des Affaires Maritimes "Normandie - Mer du Nord" au Havre : tous deux désiraient en effet que soient précisées les possibilités de certains sites de Basse-Normandie, vis à vis de la conchyliculture et de son développement éventuel.
Tipo: Text
Ano: 1981
URL: http://archimer.ifremer.fr/doc/00140/25164/23271.pdf

Bilan et perspectives de developpement des DCP au Cap-Vert
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rey-valette, H; Martins, P.
A new programme concerning the experimentation of about thirty Fish Aggregating Devices (FADs) is to start in the Cape Verde Islands at the end of 1999. In this context, this communication is intended: - to evaluate the halieutic, economic and social conditions of the artisanal fishery in this archipelago, notably in terms of assets and constraints. Although these conditions are very heterogeneous depending on islands, the fads seem to be able to help the stabilization and the development of the fishing activities, disadvantaged by a low productivity, limited operating ranges of boats, and very irregular outings at sea. But the narrowness of the domestic market is likely to cause drops in the fish prices if the production increases, while the absence of...
Tipo: Text
Palavras-chave: Attracting techniques; Capture fishery economics; Fishery management; Operational costs; Stock assessment; Tuna fisheries; Article Geographic Terms: Cape Verde Is.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00042/15317/12644.pdf

Report of the Workshop on Age Reading of Saithe (Pollachius virens) (WKARPV) 26-29 May 2015 Boulogne-sur-mer
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ICES.
The workshop on age reading of Saithe (Pollachius virens) (WKARPV) was held in Boulogne-sur-Mer, France, from 26 to 29 May 2015. The meeting was co-chaired by Kélig Mahé (France) and Jane A. Godiksen (Norway), and included eight age readers from four countries. The objectives of this first workshop were to review, document and make recom-mendations on current methods of aging saithe (Pollachius virens). This workshop was preceded by an otolith exchange in 2013, which was undertaken using WebGR. Participants who hadn’t taken part in the exchange were asked to annotate the images in the months prior to the workshop, however, due to problems with accessing WebGR only a limited amount of the readers managed to do this in time. The otolith collection included...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00272/38280/36463.pdf

Acquisition of susceptibility to Vibrio penaeicida in Penaeus stylirostris postlarvae and juveniles
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Goarant, Cyrille; Regnier, France; Brizard, Raphael; Marteau, Anne-laure.
Vibriosis is a major disease problem in shrimp aquaculture, affecting all developmental stages, from larvae in hatchery tanks to juveniles and broodstock in growout ponds. However, bacterial strains responsible for vibriosis in the successive stages are usually considered to be different, and virulence specificity has been reported both at the species and at the stage levels. The so-called « Syndrome 93 » is a seasonal juvenile vibriosis caused by Vibrio penaeicida which affects Penaeus stylirostris in growout ponds and broodstock tanks in New Caledonia. This pathology does not cause any mortality in hatchery or nursery phases. An experimental infection design using balneation of postlarvae and early juveniles in V. penaeicida suspensions was used to...
Tipo: Text
Palavras-chave: Penaeus stylirostris; Vibrio sp.; Diseases and their control crustaceans.
Ano: 1998
URL: https://archimer.ifremer.fr/doc/1998/publication-383.pdf

Traitement ionisant des produits de la pêche
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Henon, Yves.
Après une présentation rapide du procédé et de ses caractéristiques essentielles, divers aspects de la microbiologie des denrées ionisées sont passés en revue, en particulier le problème de Clostridium botulinum type E. Les principales applications potentielles sont brièvement décrites à savoir la radurisation des produits de la pêche à l'état frais ou congelé, la désinsectisation du poisson séché, la radicidation des farines de poisson. En conclusion, la faisabilité et les perspectives d'utilisation pour les produits de la pêche sont examinées.
Tipo: Text
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/publication-7042.pdf

Flottille des caseyeurs. Façade Mer du Nord - Manche. 2018. Synthèse des flottilles de pêche.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d’Informations Halieutiques » (SIH) de l’Ifremer, qui constitue le réseau d’observation des ressources halieutiques et des usages associés. Ce projet s’inscrit dans la mission de service d’intérêt public de l’Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l’analyse du secteur des pêches, le SIH a en charge l’élaboration d’indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche et du grand public.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00613/72498/71460.pdf

A Bayesian two-stage biomass model applied to the English Channel stock of cuttlefish (Sepia officinalis)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Alemany, Juliette; Rivot, Etienne; Foucher, Eric; Vigneau, Joel; Robin, Jean-paul.
Among the English Channel fishery, the importance of cuttlefish stock has increased, following the cephalopods global landings and market trend. An adapted stock assessment model is needed in order to give good management advice with accurate uncertainties. Age based methods in this species are hampered by time consuming age determination with statoliths. A model requiring few data and adapted to the species life-history is therefore proposed. An assessment of this stock was conducted in June 2015 by fitting a two-stage biomass model on a 22 years’ time-series (1992-2014). The use of a Bayesian framework is particularly adapted for decision making, allowing the propagation of uncertainty in the model. It also permits the use of different sources of...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00379/49066/49514.pdf

Effets d’une exposition alimentaire chronique à un mélange environnemental de PCB et PBDE sur les traits d’histoire de vie, la bioénergétique et la dynamique des populations de poissons
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Horri, Khaled.
Persistent organic pollutants (POPs) are a broad group of compounds with varying physicochemical and toxic properties. Among POP, polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) are two families of hydrophobic compounds sharing some similar environmental properties such as hydrophobicity, persistence, bioaccumulation and toxicity. Previous studies have demonstrated that these compounds could affect fish life-history traits such as survival, growth and reproductive success. However, few studies have focused on environmental situations as most previous works investigated the effect of either single congeners, or single families of molecules among POP, or high concentrations, so that results can hardly be transposed to natural...
Tipo: Text
Palavras-chave: Poisson-zèbre; Écotoxicologie; Polluants organiques persistants; Allocation d’énergie; Modes d’action; Dynamique des populations; Populations structurées; Zebrafish; Ecotoxicology; Persistent organic pollutants; Energy allocation; Modes of action; Population dynamics; Structured populations.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00444/55592/57219.pdf

Suivi 2014 des captures d'anguilles pour la DCF : analyse des otolithes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Elleboode, Romain; Oudard, Clemence; Bellamy, Elise; Penil, Caroline; Mahe, Kelig.
Ce rapport synthétise l'analyse des otolithes d'anguilles prélevés en 2014 dans le cadre du suivi des captures de cette espèce inscrite à la DCF (Data Collection Framework règlement CE n°199/2008 du conseil du 25 février 2008). 212 anguilles ont été prélevées de septembre à décembre 2014 dans le lac de Grand Lieu (n=49), la Loire fluviale (n=51), la Dordogne (n=59) et la Garonne (n=53). La relation entre la longueur totale (Lt) et le poids total (W) des anguilles prélevées en 2014 dans toute la France est du type W = 4.10-4.Lt3,41. Ainsi, les anguilles présentent une allométrie majorante (b=3,41) c’est-à-dire que le poids croit plus vite que la longueur. L'institut IFREMER à travers le pôle national de Sclérochronologie à Boulogne-sur-mer a préparé et...
Tipo: Text
Palavras-chave: Anguille; Otolithe; Age; Dordogne; Loire; Garonne; Lac de Grand Lieu.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00310/42082/41385.pdf

Bivalves: Indicateurs de pollution microbienne des eaux littorales
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Plusquellec, A; Beucher, M; Legal, Y.
Sea water and mussels from a natural site (Concarneau - France) have been compared for fecal contamination by enumeration of their fecal Coliform and fecal Streptococci content. Mussels contain a significant concentration of bacteria, although this concentration differs for the two indicators. Enumeration of fecal Streptococci in bivalves leads to a reduction of the variability observed in sea water. Mussels allow a more efficient assessment of Salmonella in the marine environment than sea water itself.
Tipo: Text
Palavras-chave: ANE; France; Brittany; Concarneau Bay Salmonella Mytilidae Bivalvia Streptococcus Tidal currents Bioaccumulation Marine pollution Sea water Bacteria Pollution indicators Pollution detection Microbial contamination Indicator species.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-1005.pdf

Les encroûtements cobaltifères de Polynésie française
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bougault, Henri; Saget, Philippe.
Amas sulfurés hydrothermaux, nodules et encroûtements ferromanganésifères constituent en l’état des connaissances les trois ressources minérales potentielles des « grands fonds » marins. L’évolution du contexte international pour l’accès aux matières premières depuis quelques années conduit naturellement à porter une attention à ces ressources potentielles sous-marines. Bien que les encroûtements ferromanganésifères puissent présenter la plus grande valeur en métal contenu [Ifremer, 2011], principalement en raison de leur concentration en cobalt, l’étude de ces encroûtements et de leur contexte n’ont pas fait l’objet, en France, d’autant d’investigations que les nodules de manganèse ou les amas sulfurés hydrothermaux. On se propose de résumer les...
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00069/18029/15560.pdf

Préparation des collecteurs - tuiles : un essai de lutte contre la fixation des salissures
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Dantec, Jean.
Les ostréiculteurs du bassin d'Arcachon utilisent pour la récolte du naissain des tuiles demi-cylindriques d'une surface voisine de 17dm2. Elles sont traditionnellement recouvertes d'un enduit dont la composition est très variable. La "baille à mortier" permet de traiter 1.000 tuiles. Voici deux exemples concrets du mélange utilisé.
Tipo: Text
Palavras-chave: Huître; Reproduction; Collecteur; Tuile; Fixation naissain.
Ano: 1956
URL: http://archimer.ifremer.fr/doc/00004/11477/8036.pdf

Diet and feeding observations from an unusual beluga harvest in 2014 in Ulukhaktok, Northwest Territories, Canada
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Loseto, Lisa L.; Brewster, Jasmine D.; Ostertag, Sonja K.; Snow, Kathleen; Macphee, Shannon A.; Mcnicholl, Darcy G.; Choy, Emily S.; Giraldo, Carolina; Hornby, Claire A.
The Eastern Beaufort Sea (EBS) beluga (Delphinapterus leucas) population are an important traditional food for the Inuit of the Inuvialuit Settlement Region, Northwest Territories (NT) Canada. In 2014, over 30 beluga whales were harvested at Ulukhaktok, NT, the first occurrence for a large harvest in the area. Unlike observations from the established beluga harvest monitoring in the Mackenzie Estuary, these belugas had numerous prey and prey items in their stomachs. Our study objectives were to combine traditional and local knowledge (TLK) from beluga hunters with the analysis of dissected stomachs to identify EBS beluga diet, feeding behaviour, as well as gain insights into potential drivers of the event. TLK holders witnessed foraging behaviors such as...
Tipo: Text
Palavras-chave: Beluga diet; Stomach contents; Traditional and local knowledge; Sandlance.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00428/53927/55053.pdf

Impact of natural (waves and currents) and anthropogenic (trawl) resuspension on the export of particulate matter to the open ocean Application to the Gulf of Lion (NW Mediterranean)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ferre, B; De Madron, X; Estournel, C; Ulses, C; Le Corre, Gildas.
Modern sediment deposits on continental margins form a vast reservoir of particulate matter that is regularly affected by resuspension processes. Resuspension by bottom trawling on shelves with strong fishing activity can modify the scale of natural disturbance by waves and currents. Recent field data show that the impact of bottom trawls on fine sediment resuspension per unit surface is comparable with that of the largest storms.   We assessed the impact of both natural and anthropogenic processes on the dispersal of riverborne particles and shelf sediments on the Gulf of Lion shelf. We performed realistic numerical simulations of resuspension and transport forced by currents and waves or by a fleet of bottom trawlers. Simulations were conducted for a...
Tipo: Text
Palavras-chave: Mediterranean; Trawling; Fisheries; Shelf slope exchanges; Sediment transport; Sediment dynamics.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4682.pdf

Influence of Ross Sea Bottom Water changes on the warming and freshening of the Antarctic Bottom Water in the Australian-Antarctic Basin
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Shimada, K.; Aoki, S.; Ohshima, K. I.; Rintoul, S. R.
Changes to the properties of Antarctic Bottom Water in the Australian-Antarctic Basin (AA-AABW) between the 1990s and 2000s are documented using data from the WOCE Hydrographic Program (WHP) and repeated hydrographic surveys. Strong cooling and freshening are observed on isopycnal layers denser than γn = 28.30 kg m−3. Changes in the average salinity and potential temperature below this isopycnal correspond to a basin-wide warming of 1300 ± 200 GW and freshening of 24 ± 3 Gt year−1. Recent changes to dense shelf water in the source regions in the Ross Sea and George V Land can explain the freshening of AA-AABW but not its extensive warming. An alternative mechanism for this warming is a decrease in the supply of AABW from the Ross Sea (RSBW). Hydrographic...
Tipo: Text
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00140/25131/23241.pdf

Small pelagic fish in the new millennium: A bottom-up view of global research effort
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Peck, Myron A.; Alheit, Jürgen; Bertrand, Arnaud; Catalán, Ignacio A.; Garrido, Susana; Moyano, Marta; Rykaczewski, Ryan R.; Takasuka, Akinori; Van Der Lingen, Carl D.
Small pelagic fish (SPF) play extremely important ecological roles in marine ecosystems, form some of the most economically valuable fisheries resources, and play a vital role in global food security. Due to their short generation times and tight coupling to lower trophic levels, populations of SPF display large boom-and-bust dynamics that are closely linked to climate variability. To reveal emerging global research trends on SPF as opposed to more recently published, ecosystem-specific reviews of SPF, we reviewed the literature published in two, 6-year periods in the new millennium (2001–2006, and 2011–2016) straddling the publication of a large, global review of the dynamics of SPF in 2009. We explored intrinsic and extrinsic (bottom-up) factors...
Tipo: Text
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00678/78985/81378.pdf

Late Quaternary deep-sea sedimentation in the western Black Sea: New insights from recent coring and seismic data in the deep basin
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lericolais, Gilles; Bourget, Julien; Popescu, Irina; Jermannaud, Paul; Mulder, T.; Jorry, Stephan; Panin, N.
The Danube River Basin–Black Sea area represents a unique natural laboratory for studying the interplay between lithosphere and surface as well as source to sink relationships and their impact on global change. This paper addresses some information on the “active sink” of the system; i.e. the Danube deep sea fan and the Black Sea basin. The present study focuses on the distal sedimentary processes and the evolution of sedimentation since the Last Glacial Maximum. This is investigated through recently acquired long piston coring and shallow seismic data recovered at the boundary of influence of the distal part of the Danube turbidite system (to the north-west) and the Turkish margin (to the south). This dataset provides a good record of the recent changes...
Tipo: Text
Palavras-chave: Black Sea; Deep sea fan; Danube turbidite system; Turkish margin; Thick mud turbidites; Sediment gravity flow; Sedimentation forcing; Active margin; Source-to-sink.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00095/20637/18272.pdf

Les maladies des mollusques : étiologie et progrès récents des recherches
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Grizel, Henri.
Recent research in mollusc pathology has enabled different pathogens of the large systematlc groups to be described. The main microorganisms and Protozoans are enumerated showing the economic incidence of the deseases on mollusc production. We also mention recent results obtained in the laborarory for dlfferent purified organisms. Finally, we review advances in cell culture giving an example of the application of these techniques experimental pathogenesis.
Tipo: Text
Palavras-chave: Pathogens; Pathology; Molluscs; Agents pathogènes; Pathologie; Mollusques.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/publication-3105.pdf

Global baselines and benchmarks for fish biomass: comparing remote reefs and fisheries closures
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mcclanahan, Tim R.; Schroeder, Robert E.; Friedlander, Alan M.; Vigliola, Laurent; Wantiez, Laurent; Caselle, Jennifer E.; Graham, Nicholas A. J.; Wilson, Shaun; Edgar, Graham J.; Stuart-smith, Rick D.; Oddenyo, Remy M.; Cinner, J. E.
Baselines and benchmarks (B&amp;Bs) are needed to evaluate the ecological status and fisheries potential of coral reefs. B&amp;Bs may depend on habitat features and energetic limitations that constrain biomass within the natural variability of the environment and fish behaviors. To evaluate if broad B&amp;Bs exist, we compiled data on the biomass of fishes in similar to 1000 reefs with no recent history of fishing in 19 ecoregions. These reefs spanned the full longitude and latitude of Indian and Pacific Ocean reefs and included older high-compliance fisheries closures (&gt;15 yr closure) and remote reef areas (&gt;9 h travel time from fisheries markets). There was no significant change in biomass over the 15 to 48 yr closure period but closures had only...
Tipo: Text
Palavras-chave: Baselines; Coral reef fish; Fisheries and ecological indicators; Pristine or virgin biomass; Sustainability.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00589/70064/68028.pdf

Emergence of new norovirus variants on spring cruise ships and prediction of winter epidemics
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Verhoef, L; Depoortere, E; Boxman, I; Duizer, E; Van Duynhoven, Y; Harris, J; Johnsen, C; Kroneman, A; Le Guyader, Soizick; Lim, W; Maunula, L; Meldal, H; Ratcliff, R; Reuter, G; Schreier, E; Siebenga, J; Vainio, K; Varela, C; Vennema, H; Koopmans, M.
In June 2006, reported outbreaks of norovirus on cruise ships suddenly increased; 43 outbreaks occurred on 13 vessels. All outbreaks investigated manifested person-to-person transmission. Detection of a point source was impossible because of limited investigation of initial outbreaks and data sharing. The most probable explanation for these outbreaks is increased norovirus activity in the community, which coincided with the emergence of 2 new GGII.4 variant strains in Europe and the Pacific. As in 2002, a new GGII.4 variant detected in the spring and summer corresponded with high norovirus activity in the subsequent winter. Because outbreaks on cruise ships are likely to occur when new variants circulate,. an active reporting system could function as an...
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-3942.pdf

Qualification des données acquises par la station de mesure HF MOLIT en baie de Vilaine en 2018 et 2019
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Retho, Michael.
Ce rapport présente les éléments qui ont conduit à la qualification des données acquises en 2018 et 2019 par la station de mesure haute fréquence MOLIT (Mer Ouverte Littoral). La bouée MOLIT est déployée depuis 2008 en baie de Vilaine, une des zones de la côte atlantique les plus menacées par l’eutrophisation. Cette bouée instrumentée constitue un des systèmes de mesure du réseau de mesure haute fréquence COAST-HF (Coastal OceAn observing SysTem – High Frequency). Cette station est équipée d’une sonde multiparamètres qui mesure les paramètres température, salinité, oxygène dissous, turbidité et fluorescence. Les mesures sont effectuées à deux niveaux (surface et fond) avec une fréquence horaire. Ce rapport synthétise les informations qui ont permis de...
Tipo: Text
Palavras-chave: MOLIT; Bouée instrumentée; Haute fréquence; Baie de Vilaine; Qualification; Température; Salinité; Oxygène dissous; Turbidité; Fluorescence.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00636/74842/75193.pdf

Activités parapétrolières et paragazières offshore. Sous-région marine Golfe de Gascogne. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guingand, Aurélien.
Tipo: Text
Palavras-chave: Golfe de Gascogne; Activités parapétrolières; Activités paragazières; Offshore; Réglementation; Interaction avec le milieu.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00330/44080/43651.pdf

Apports fluviaux en substances dangereuses (micropolluants). Sous-région marine Manche - Mer du Nord. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dubois, Aurélie.
Tipo: Text
Palavras-chave: Manche; Mer du Nord; Apports fluviaux; Micropolluants; Evolution interannuelle.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00327/43863/43437.pdf

Bilan des campagnes océanographiques françaises 2017
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Danioux, Nolwenn.
This document reports on the French oceanographic cruises conducted in 2017. It was drawn up by Ifremer, and more specifically by the SISMER (French acronym for Scientific information systems for the Sea) department which oversees managing the metadata and data produced by French research cruises. It provides a detailed description of the role of the various players managing French ocean-going facilities and of the means to archive cruise information and oceanographic data. It presents the fleet's activity in 2017 and provides dynamic access to cruise information through the new research cruise catalogue: http://campagnes.flotteoceanographique.fr/.
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00446/55723/57447.pdf

Avis sur le renforcement du poste Est de l'appontement pétrolier, port de commerce La Rochelle Pallice
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thomas, Gerard.
Tipo: Text
Ano: 1994
URL: https://archimer.ifremer.fr/doc/00141/25273/23330.pdf

Réseau de surveillance microbiologique -REMI- Répertoire des points et liste des codes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Grouhel-pellouin, Anne; Raffin, Bernard.
Le REMI - réseau national de surveillance microbiologique du littoral - a pour objectif l'évaluation de la contamination bactériologique du milieu marin littoral et la compréhension des mécanismes de la contamination. Il a été structuré en 1989, avec la mise en place d'un ensemble de points sentinelles permanents (points S) renforcé ponctuellement par des points additionnels provisoires. Les prélèvements sont faits selon une stratégie aléatoire régulière pour les points S et certains points additionnels (études spécifiques ...) ou une stratégie opportune (certaines études, échantillonnage en période de risque de contamination ...). Le fonctionnement du REMI a été revu en 1993 en vue de son optimisation: adaptation des fréquences d'échantillonnage, révision...
Tipo: Text
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00040/15149/12486.pdf

Section internationale d'Océanographie des pêches maritimes et des produits de la mer. Rapport général
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bénard, Charles.
On verra, au cours de ce rapport, dans quelles conditions l'Exposition internationale d'Océanographie, des Pêches maritimes et des Produits de la Mer prit naissance à l'Exposition coloniale de Marseille et quelles circonstances la firent naître. Il y avait donc là une tentative nouvelle à faire : résumer, généraliser et essayer de répandre les progrès industriels de la pêche, depuis l'application de la vapeur au chalutage, et, cela, non seulement en ce qui concerne la pêche en elle-même, mais encore les adjuvants qui s'y rattachent, sans lesquels la pêche, même abondante, ne donnerait aucun résultat pratique : la question de l'emballage et du transport rapide du poisson frais.
Tipo: Text
Ano: 1907
URL: http://archimer.ifremer.fr/doc/00016/12682/9605.pdf

Méthodes d’estimation des surfaces développées de coraux scléractiniaires à l’échelle d’une colonie ou d’un peuplement
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chancerelle, Y.
This study presents an original method for the determination of the actual surface area of Scleractinian corals at colony-scale and at the scale of a whole reef. Firstly, at colony-scale, the technique consists of dipping coral colonies in a liquid paraffin bath and measuring the weight of the coral before and after the dipping. It is based on the relationship between the weight and the surface area of paraffin deposited and allows one to obtain the actual surface area of coral colonies in the laboratory. The main advantages of this method compared to others is that it uses easily obtainable materials and it is adaptable to all colony shapes. It was used on coral colonies representing the six most frequently seen colony shapes on the reefs of the island of...
Tipo: Text
Palavras-chave: Surface développée; Colonie corallienne; Récif corallien; Actual surface area; Coral colony; Coral reef.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00325/43571/44052.pdf

Impact of deglacial and Holocene AMOC changes on the mixed layer and deepwater hydrography of the subtropical North Atlantic
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Respschläger, Janne.
The Atlantic meridional overturning circulation (AMOC) transports warm saline water from low to high northern latitudes where it cools, sinks down and returns southward as deepwater flow. By the heat transfer from low to high latitudes, AMOC contributes in balancing the global energy budget and thus is an important part of global climate system. Within this study the impact of AMOC changes on surface and deepwater hydrography of the subtropical North Atlantic is investigated by the use of high-resolution sediment cores from a coring site located south of the Azores at the eastern flank of the Mid Atlantic Ridge. The Azores coring site is situated in the subtropical eastern North Atlantic (NA) at the boundary between warm Subtropical Gyre Water (STG) and...
Tipo: Text
Palavras-chave: Paleoceanography; AMOC; Subtropical gyre; Deglacial; Multiproxy SST; BWT; Stable isotopes; Planktonic and benthic foraminifera.
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00493/60444/63889.pdf

Reply to comment by Paul A. Hwang on "A study of the slope probability density function of the ocean waves from radar observations'' by D. Hauser et al.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hauser, Daniele; Caudal, Gerard; Guimbard, Sebastien; Mouche, Alexis.
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00000/11060/7420.pdf

Lagrangian circulation of Antarctic Intermediate Water in the subtropical South Atlantic
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Nunez Riboni, Ismael; Boebel, Olaf; Ollitrault, Michel; You, Yuzhu; Richardson, Philip; Davis, Russ.
This study combines float data from different projects collected between 1991 and 2003 in the South Atlantic to describe the flow of Antarctic Intermediate Water (AAIW). Velocity space-time averages are calculated for various grid resolutions and with cells deformed to match the bathymetry, f/H or f/h (with H being the water depth and It being the thickness of the AAIW layer). When judged by the degree of alignment between respective isolines and the resulting average velocity fields, the best grid is based on a nominal cell size of 3&amp;DEG; (latitude) by 4&amp;DEG; (longitude) with cell shapes deformed according to f/h. Using this grid, objectively estimated mean currents (and their associated errors), as well as meridional and zonal volume transports...
Tipo: Text
Palavras-chave: Objective analysis; Transports; Lagrangian circulation; South Atlantic; Neutral density surfaces; Floats; Antarctic Intermediate Water ( AAIW ).
Ano: 2005
URL: https://archimer.ifremer.fr/doc/2005/publication-781.pdf

Mesozooplankton distribution from Sicily to Cyprus (Eastern Mediterranean) .1. General aspects
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mazzocchi, Mg; Christou, Ed; Fragopoulu, N; Siokoufrangou, I.
The first synoptic basin-wide oceanographic survey in the Eastern Mediterranean Sea was carried out in October-November 1991 within the framework of the international programme POEM-BC (Physical Oceanography of the Eastern Mediterranean - Biology, Chemistry). Mesozooplankton samples were collected at 32 stations in the Sicily Channel, Ionian Sea, Cretan Sea, Cretan Passage, Rhodes area and central Levantine Sea. Vertical hauls were taken from four discrete depth layers in the upper 300 m water column. The gross features of the mesozooplankton communities, at the phyla, class or order level, are described. Depth-integrated abundances showed high homogeneity within each region, with the highest and lowest values recorded in the Sicily Channel (mean: 200 ind....
Tipo: Text
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00093/20412/18079.pdf

Report of the Working Group on Crangon Fisheries and Life History (WGCRAN), 18–20 May 2015, Ijmuiden, the Netherlands
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ICES.
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00587/69948/67854.pdf

Suppression substractive hybridisation (SSH) and real time PCR reveal differential gene expression in the Pacific cupped oyster, Crassostrea gigas, challenged with Ostreid herpesvirus 1
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Renault, Tristan; Faury, Nicole; Barbosa Solomieu, Valérie; Moreau, Kevin.
Virus-induced genes were identified using suppression subtractive hybridisation (SSH) from Pacific cupped oyster, Crassostrea gigas, haemocytes challenged by OsHV-1. A total of 304 clones from SSH forward library were sequenced. Among these sequences, some homologues corresponded to (i) immune related genes (macrophage express protein, IK cytokine, interferon-induced protein 44 or multicopper oxidase), (ii) apoptosis related genes (Bcl-2) and (iii) cell signalling and virus receptor genes (glypican). Molecular characterization and phylogenic analysis of 3 immune-related genes (macrophage expressed protein, multicopper oxidase and immunoglobulin domain cell adhesion molecule) were performed. Finally, quantitative PCR revealed significant changes in the...
Tipo: Text
Palavras-chave: Pacific cupped oyster; Crassostrea gigas; OsHV-1; Immunity; Gene expression; Multicopper oxidase; Macrophage expressed protein; Ig cell adhesion molecule; Interferon-induced protein 44; Virus RNA.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00043/15466/12843.pdf

Trace elements in three marine birds breeding on Reunion Island (Western Indian Ocean): Part 2 - Factors influencing their detoxification
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kojadinovic, Jessica; Bustamante, Paco; Le Corre, M; Cosson, R. P.
Seabird tissues collected between 2002 and 2004 from Barau's Petrel (Pterodroma baraui), Audubon's Shearwater (Puffinus lherminieri bailloni), and White-Tailed Trop icbird (Phaethon lepturus) colonies on Reunion Island were analyzed for metallothioneins (MTs) and trace element content. The subcellular distribution between soluble and insoluble fractions of Cd, Cu, Fe, Mn, Se, and Zn was determined in liver and kidney. In both, the soluble fraction of the cell concentrated most of the Cd and Se, whereas Fe, Mn, and Zn were preferentially accumulated in the insoluble fraction. The distribution of these elements varied with the tissue, age of the bird, and species. Furthermore, the distributions of Fe and Mn were somewhat influenced by the bird's physical...
Tipo: Text
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2489.pdf

Biofouling protection for marine environmental sensors
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Delauney, Laurent; Compere, Chantal; Lehaitre, Michel.
These days, many marine autonomous environment monitoring networks are set up in the world. These systems take advantage of existing superstructures such as offshore platforms, lightships, piers, breakwaters or are placed on specially designed buoys or underwater oceanographic structures. These systems commonly use various sensors to measure parameters such as dissolved oxygen, turbidity, conductivity, pH or fluorescence. Emphasis has to be put on the long term quality of measurements, yet sensors may face very short-term biofouling effects. Biofouling can disrupt the quality of the measurements, sometimes in less than a week. Many techniques to prevent biofouling on instrumentation are listed and studied by researchers and manufacturers. Very few of them...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00008/11920/8626.pdf

Remarques complémentaires sur le Néogène de la mer d'Alboran
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pastouret, Léo; Olivet, Jean-louis; Auzende, Jean-marie; Rehault, Jean-pierre.
The existence of a discontinuity in the marine series between late Miocene and lower Pliocene in the Alboran sea has been put to light by the study of sedimentological, stratigraphical and geophysical data. This discontinuity consists of an evaporitic and salt layer in the deep parts of the basin, and of a stratigraphic hiatus near drill site 121 of Glomar Challenger. [NOT CONTROLLED OCR]
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1975
URL: http://archimer.ifremer.fr/doc/1975/publication-5096.pdf

Pour un poisson bien élevé : activité à l'Ifremer
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Coves, Denis.
La zootechnie est une science dont l'Ifremer a su, ces 10 dernières années, favoriser l'épanouissement et son application aux poissons marins en cours de domestication. Avec succès d'ailleurs, à en croire les jugements de nos collègues européens qui citent cette démarche comme une référence.
Tipo: Text
Ano: 1993
URL: http://archimer.ifremer.fr/doc/1993/publication-7479.pdf

Immobilization of Protein A on SAMS for the elaboration of immunosensors
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Briand, Elisabeth; Salmain, Michèle; Compere, Chantal; Pradier, Claire-marie.
Binary mixtures of 11-mercaptoundecanoic acid (MUA) and other thiols of various lengths and terminal functions were chemisorbed on gold-coated surfaces via S-Au bonds to form mixed self-assembled monolayers (SAMs). Several values of the inole fraction of MUA in the thiol mixtures were tested and the structure and composition of the resulted thin films were characterized by X-ray photoelectron spectroscopy (XPS) and polarization modulation infrared reflection-absorption spectroscopy (PM-IRRAS). The results made it clear that co-adsorption of MUA with thiols of similar chain length led to well-ordered monolayers whereas the co-adsorption of MUA with shorter thiols yielded less crystalline-like thin films, but with more reactive carboxylic acid terminal...
Tipo: Text
Palavras-chave: PM IRRAS; Antibody; Protein A; Gold; Self assembled monolayers.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2222.pdf

Résultats de la Surveillance de la Qualité du Milieu Marin Littoral. Régions : Provence-Alpes-Côte d’Azur et Corse. Edition 2003
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer, laboratoire côtier de Provence Azur Corse.
Dans le cadre du Système national d'Information sur l'Eau, mis en place par le Ministère de l'Ecologie et du Développement Durable, l’Institut national de recherche marine (Ifremer) opère de façon coordonnée à l'échelle du littoral français trois programmes nationaux de surveillance : le réseau de contrôle microbiologique (REMI), le réseau de surveillance du phytoplancton et des phycotoxines (REPHY), le Réseau d'Observation de la Contamination Chimique (RNO). Le suivi des phycotoxines dans les coquillages réalisé par le REPHY est sous maîtrise d'ouvrage du Ministère de l'Agriculture et de la Pêche. Sous l’impulsion de la Directive européenne Cadre sur l'Eau (DCE), le réseau de surveillance benthique (REBENT) est en voie d’extension nationale.
Tipo: Text
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00318/42950/42458.pdf

Milieu vivant: Synthese des discussions
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Retiere, C.
After a general note the author reports the effects of pollutants in organisms, in particular, sublethal effects and bioaccumulation.
Tipo: Text
Palavras-chave: Estuarine organisms; Sublethal effects; Environmental impact; Estuaries; Bioaccumulation; Pollution effects; Brackishwater pollution.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1311.pdf

La première campagne 1957 du navire océanographique "Président Théodore Tissier"
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Faure, Louis.
La première campagne du navire océanographique "Président Théodore Tissier" a été consacrée, du 1er au 17 mars, à la recherche de fonds chalutables à l'Ouest de l'Irlande.  Dans le cadre que s'est fixé l'Institut des Pêches maritimes d'étudier sur le plan pratique la bordure du plateau continental depuis la Mer de Norvège jusqu'au Golfe de Gascogne le banc Porcupine avait été déjà prospecté en 1954. A cette époque, faute d'un treuil de pêche suffisamment puissant, le travail avait dû être limité au banc lui-même et à ses abords immédiats ; le chalut n'avait été traîné que jusqu'à des fonds de 390 m.
Tipo: Text
Ano: 1957
URL: http://archimer.ifremer.fr/doc/1957/publication-7218.pdf

Genetic improvement of common carp (Cyprinus carpio L.)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vandeputte, Marc.
Common carp was the first domesticated fish species and is now a major species in worldwide aquaculture. Although research has generated a considerable body of knowledge about its genetics, genetic improvement programmes are virtually non-existent in this species and only crossbreeding is used in practice. The main reasons are the inefficiency of methods usually effective in other aquaculture species (monosexing, triploidy), and the bad image of selective breeding which is difficult to implement in ponds, and for which reliable genetic parameters were missing until recently. These parameters are now becoming available through the use of parentage assignment with microsatellite markers. However, the question of selective breeding for growth remains far from...
Tipo: Text
Palavras-chave: Selection; Population genetics; Cyprinus carpio; Breeding; Aquaculture.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6563.pdf

Qualité sanitaire des gisements naturels de coquillages Ille-et-Vilaine &amp; Côtes d’Armor. Pêche à pied récréative. Année 2016
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cheve, Julien; Passelergue, Serge; Prigent, Jean-luc.
Le présent document dresse le bilan de la qualité sanitaire de l’ensemble des gisements naturels suivis par l’ARS Bretagne et l’Ifremer dans les départements des Côtes d’Armor et d’Ille-et-Vilaine, sur la période 2013-2015. Ce rapport s’inscrit dans le cadre du projet RESP²ONsable, mené par l’Ifremer et l’ARS Bretagne depuis 2013 sur la communication des risques sanitaires de la pêche à pied récréative. Son support principal est un site internet mettant à disposition du public une information complète et actualisée, à l’échelle de la Bretagne.
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00339/45067/44492.pdf

Mineral and organic soluble forms of zinc, iron and copper: Distribution in the Seine Estuary.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gandon, R; Guegueniat, P; Fischer, J; Wartel, M.
One characteristic of the Seine Estuary system is the process of sediment resuspension by the specific hydrodynamics of this environment. It's the main factor of trace metals transport. Autotrophic activities also have an effect on the estuary, by pH variation. The behavior of soluble and organic copper, iron, have been studied in relation to salinity in and out of the estuary. The results are compared with those of other estuaries.
Tipo: Text
Palavras-chave: Hydrodynamics; Physicochemical properties; Water properties; Dissolved organic matter; Biogeochemical cycle; Resuspension; Metals; Suspended particulate matter.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1300.pdf

Report on the approaches implemented in the Mediterranean countries for GES descriptor 8. Proposition of a road map for a better harmonization
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mauffret, Aourell; Bajt, Oliver; Bellas, Juan; Chalkiadaki, Olga; Dassenakis, Manos; Giannoudi, Louisa; Giubilato, Elisa; Hatzianestis, Ioannis; Marcomini, Antonio; Paramana, Theodora; Tsangaris, Catherine; Tronczynski, Jacek; Zeri, Christina.
Based on the data gap analysis performed in the first step of MEDCIS, the Medcis team on contaminant proposed a road map associated with a time-schedule in order to improve harmonization in Mediterranean region for 2024 GES assessment. Partner countries shared information on monitored substances and biological effects, thresholds used, matrix/matrices used for the monitoring of each substance/family of substances, the limit of quantification (LQ) of each chemical measurement, and the proportion of censored data
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00620/73249/72463.pdf

Experimental analysis of the floor inclination effect on the turbulent wake developing behind a wall mounted cube
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ikhennicheu, Maria; Gaurier, Benoit; Druault, Philippe; Germain, Gregory.
The present study aims at investigating turbulence characteristics in high flow velocity areas like those suitable for marine energy application. The Reynolds number, based on the rugosity height and mean flow velocity, is rather high: . For that purpose, experiments are carried out in a flume tank with as high as achievable in Froude similitude (in the tank: and ). Obstacles are canonical wall-mounted elements chosen to be representative of averaged bathymetric variations: a cube and a cube followed by an inclined floor. First, the wake topology past a canonical wall-mounted cube is illustrated from PIV measurements. Results show a flow behaviour already observed in the literature but for different upstream conditions ( and turbulence intensity). Second,...
Tipo: Text
Palavras-chave: Turbulence; Experimental trials; Wall-mounted obstacles; PIV; POD; Quadrant method.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00449/56050/57570.pdf

Avis de l'Ifremer sur la Demande de changement d'espèces à titre expérimental sur le 10ème palier de la zone ostréicole d'Hirel
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Mao, Patrick; Le Noc, Sandrine; Rollet, Claire.
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00408/51912/79265.pdf

The use of microsatellite markers for parentage analysis in the Pacific cupped oyster, Crassostrea gigas (Thunberg)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boudry, Pierre; Collet, Bertrand; Kotoulas, Georgios; Magoulas, Antonio; Hervouet, Veronique; Bonhomme, Francois; Gerard, Andre.
Highly polymorphic genetic markers can be useful tools for the analysis of parental contributions. The present paper reports 3 experiments using microsatellite markers to analyse parental contributions in controlled in vitro factorial crosses of the cupped oyster Crassostrea gigas. Parentage analysis was eased by the large polymorphism observed at the 3 loci studied. In a cross between 20 males and 20 females, a quarter of the progeny could be assigned to a given parent using a single microsatellite locus showing 28 alleles. In 3 crosses between 5 males and females, all the progeny could be assigned to a family by using 3 loci. In all cases, the combined genotyping at 2 loci allowed parentage to be detennined unambiguously. Despite the balanced gametic...
Tipo: Text
Palavras-chave: Crassostrea gigas; Microsatellites; Parental contributions; Crassostrea gigas; Microsatellites; Contributions parentales.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/1998/acte-2739.pdf

Flottille des divers petits métiers étang-mer. Façade Méditerranée. 2018. Synthèse des flottilles de pêche.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d’Informations Halieutiques » (SIH) de l’Ifremer, qui constitue le réseau d’observation des ressources halieutiques et des usages associés. Ce projet s’inscrit dans la mission de service d’intérêt public de l’Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l’analyse du secteur des pêches, le SIH a en charge l’élaboration d’indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche et du grand public.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00613/72510/71472.pdf

Epigenetically facilitated mutational assimilation: epigenetics as a hub within the inclusive evolutionary synthesis
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Danchin, Etienne; Pocheville, Arnaud; Rey, Olivier; Pujol, Benoit; Blanchet, Simon.
After decades of debate about the existence of non-genetic inheritance, the focus is now slowly shifting towards dissecting its underlying mechanisms. Here, we propose a new mechanism that, by integrating non-genetic and genetic inheritance, may help build the long-sought inclusive vision of evolution. After briefly reviewing the wealth of evidence documenting the existence and ubiquity of non-genetic inheritance in a table, we review the categories of mechanisms of parent-offspring resemblance that underlie inheritance. We then review several lines of argument for the existence of interactions between non-genetic and genetic components of inheritance, leading to a discussion of the contrasting timescales of action of non-genetic and genetic inheritance....
Tipo: Text
Palavras-chave: Non-genetic inheritance; Inclusive heritability; Epigenetics; Central dogma; Genetic assimilation; Mutation randomness; Inclusive evolutionary synthesis.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00479/59037/62430.pdf

Etat écologique du Bassin maritime de la Rance au terme de 30 ans de fonctionnement de l'usine marémotrice
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Retière, Ch.; Bonnot-courtois, C.; Le Mao, Patrick; Desroy, Nicolas.
Tipo: Text
Ano: 1997
URL: https://archimer.ifremer.fr/doc/00480/59134/61762.pdf

Evaluation de la qualité des zones de production conchylicole. Département de la Vendée (85). Edition 2020.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gervais, Hugo; Gautier, Emeric; Grizon, James; Morin, Dimitri; Soletchnik, Patrick; Piquet, Jean-come; Bruneau, Audrey.
Après un rappel des objectifs, du fonctionnement et de la méthode d'interprétation des résultats du réseau de contrôle microbiologique REMI et du réseau de surveillance chimique ROCCH, ce rapport décrit le programme annuel du département de la Vendée. Il présente l'ensemble des résultats obtenus sur la période 2017-2019, en particulier l'estimation de la qualité microbiologique et chimique des zones de production de coquillages classées.  
Tipo: Text
Palavras-chave: REMI; E. coli; Contamination bactériologique des coquillages; ROCCH; Contaminants chimiques; Milieu marin; Classement sanitaire des zones de production; Département de la Vendée (85); LERPC.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00632/74397/74099.pdf

Workshop on the future of eel advice (WKFEA).
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ICES.
The purpose of the WKFEA was to discuss the current ICES advice1 framework, consider options for future assessment and advice needs and draft a roadmap towards recommendations for a new or adapted advice framework for fishing opportunities and potentially other anthropogenic pressures on European eel. The current Advice given on eel was considered to be in accordance with the precautionary ap-proach as applied by ICES. However, there is room for improvement in the clarity of the current Advice given to make it relative to fishing opportunity, whilst considering the other anthropo-genic impacts in another section of the advice sheet. While there is a need to define reference points to inform managers of the state of the stock and with respect to recovery,...
Tipo: Text
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00687/79901/82779.pdf

Contrôle de surveillance DCE 2018. Suivi des développements d’algues vertes dans les masses d’eau littorales de l’Île d’Oléron
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Richier, Sophie; Le Bris, Anthony; Daniel, Clément; Ballu, Sylvain.
Comme dans le cas des suivis déjà réalisés en Seine-Normandie et Loire-Bretagne, ce suivi prend en compte : o trois survols du linéaire côtier, suivis de contrôles de terrain et d’estimations des surfaces couvertes par les ulves dans la perspective de calcul des métriques surfaciques permettant de qualifier l’état écologique des masses d’eau. Ces vols étant dans le prolongement de ceux effectués pour le Sud-Loire, les heures de passage sur le littoral de l’Ile d’Oléron se situent une à deux heures après la basse mer. Cela ne pose pas de problème dans la mesure où, dans ce secteur, les surfaces d’échouages sont généralement limitées au haut de plage. o une enquête auprès des communes littorales sur les échouages et ramassages entrepris sur leur littoral.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00508/61965/66057.pdf

Structuration spatiale des peuplements zooplanctoniques et fonctionnement hydrodynamique en milieu lagunaire
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Jouffre, D; Lamhoai, T; Millet, B; Amanieu, M.
In order better to understand brackish ecosystem functioning, this study deals with zooplankton spatial organization in a North-Mediterranean lagoon (etang de Thau). A statistical treatment - spatial contiguity constrained clustering - is used to divide the lagoon into several homogeneous zones with regard to zooplankton communities. Confrontation between biological and physical patterns (hydroclimatic context data together with results of a numerical simulation of hydrodynamic circulation in the lagoon) tends to show that: 1) Zooplankton community spatial patterns have a short-term significance (few days) and do not reveal any seasonal characteristic; 2) Inversion of the water flows between the lagoon and the sea plays a major role in structuring and...
Tipo: Text
Palavras-chave: ZOOPLANKTON; COMMUNITIES; SPATIOTEMPORAL PATTERNS; ECOSYSTEM FUNCTIONING; PHYSICO-BIOLOGICAL RELATION.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00101/21272/18882.pdf

Long-term fishing impact on the Senegalese coastal demersal resources: diagnosing from stock assessment models
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ba, Kamarel; Thiaw, Modou; Fall, Massal; Thiam, Ndiaga; Meissa, Beyah; Jouffre, Didier; Thiaw, Omar Thiom; Gascuel, Didier.
For the first time in Senegal, assessments based on both stochastic and deterministic production models were used to draw a global diagnosis of the fishing impact on coastal demersal stocks. Based one national fisheries databases and scientific trawl surveys data: (i) trends in landings since 1971 were examined, (ii) abundance indices of 10 stocks were estimated using linear models fitted to surveys data and commercial catch per unit efforts, and (iii) stock assessments were carried out using pseudo-equilibrium Fox and Pella-Tomlinson models and a Biomass dynamic production model fitted in a Bayesian framework to abundance indices. Most stocks have seen their abundance sharply declining over time. All stocks combined, results of stock assessments suggest a...
Tipo: Text
Palavras-chave: Coastal demersal species; Delta-GLM models; Surplus production models; Bayesian approach; Overexploitation; West Africa.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00626/73792/74929.pdf

REPHY (Réseau de suivi du phytoplancton) : Inventaire cartographique des points de prélèvements (1990)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Belin, Catherine; Raffin, Bernard.
Ce document fournit la position géographique des stations de prélèvement du REPHY (réseau de suivi du phytoplancton). Le REPHY fonctionnant sur deux niveaux: suivi (échantillonnage toute l'année) et alerte (échantillonnage spatio-temporel renforcé), 110 points de suivi et/ou d'alerte sont ainsi répertoriés
Tipo: Text
Palavras-chave: Plancton; Surveillance; Cartographie; Prelevement; Echantillonnage; Suivi.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00174/28523/26895.pdf

Utilisation du logiciel TNPC : Acquisition automatique d’images de pièces calcifiées à partir d’un scanner
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Oudard, Clemence; Elleboode, Romain; Mahe, Kelig.
L’acquisition des images peut se réaliser de façon « manuelle » (loupe binoculaire, microscope) ou de façon « automatique » à savoir à l’aide d’une platine motorisée ou d’un scanner selon le type de pièces calcifiées traitées. L’utilisation d’acquisition d’images par scanner montre un avantage de temps et de standardisation sur la méthode d’acquisition « manuelle » pour la prise d’images et la numérisation de pièces calcifiées entières fortement contrastées (analyse de forme sur otolithes entiers par exemple). Lors de l’utilisation d’un scanner, les paramètres de réglages d’acquisition et de traitement doivent être testés avant d’être appliqués de façon identique à l’ensemble des pièces calcifiées étudiées. De plus, ce mode d’acquisition assure un gain de...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00063/17419/14926.pdf

Etat de la prolifération de la crépidule (Crepidula fornicata) en baie de Saint-Brieuc.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hamon, Dominique; Blanchard, Michel.
The aim of this report is to provide an original method of mapping slipper limpet beds in the bay of Saint-Brieuc (Western Channel) by means of side scan sonar and submarine video.  An evaluation of the biomass completes the distribution of limpets. The total fresh weight is about 250 000 tons
Tipo: Text
Palavras-chave: Baie de Saint-Brieuc; Crepidula fornicala; Sonar latéral; Vidéo sous-marine; Cartographie; Biomasse; Bay of Saint-Brieuc. Crepidula fornicata; Side scan sonar; Submarine video; Cartographv; Biomass.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00107/21790/19365.pdf

Des sites possibles pour l'aquaculture marine sur le littoral d'Arles et de Port St Louis du Rhône. Reconnaissance et étude hydrobiologique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hussenot, Jerome; Castel, J; Seret, Bernard; Skubich, M; Morin, L.
Tipo: Text
Ano: 1977
URL: http://archimer.ifremer.fr/doc/00020/13119/10128.pdf

Leaching of flame-retardants from polystyrene debris: Bioaccumulation and potential effects on coral
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Aminot, Yann; Lanctôt, Chantal; Bednarz, Vanessa; Robson, William J.; Taylor, Angus; Ferrier-pagès, Christine; Metian, Marc; Tolosa, Imma.
Marine plastic debris can act as a reservoir of chemical additives that can pose a potential threat to sensitive ecosystems such as coral reefs. A survey of foam macrodebris collected on beaches indeed revealed high concentrations of hexabromocyclododecanes (ΣHBCDD) in polystyrene (PS) samples (up to 1940 μg g−1). Results also showed that PS fragments can still leach over 150 ng g−1 d−1 of ΣHBCDD (primarily as the α-isomer) for relatively long durations, and that these additives are readily bioaccumulated and well-retained by corals. Despite significant HBCDD bioaccumulation in coral tissue, short-term exposure to HBCDD or PS leachate had no considerable effect on coral photosynthetic activity, symbiont concentration and chlorophyll content. Exposure to...
Tipo: Text
Palavras-chave: Marine plastic; Polystyrene foam; Leachates; Hexabromocyclododecanes; Corals; Bioconcentration.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00606/71800/70335.pdf

Statistique des pêches maritimes - Année 1902
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Tipo: Text
Ano: 1904
URL: http://archimer.ifremer.fr/doc/00162/27332/25561.pdf

In vivo RNA interference in oyster -vasa silencing inhibits germ cell development
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fabioux, Caroline; Corporeau, Charlotte; Quillien, Virgile; Favrel, Pascal; Huvet, Arnaud.
This study investigated the potential of RNA interference, which is technically challenging in bivalve mollusc species, to assess gene function in the oyster Crassostrea gigas. We designed dsRNA targeting the oyster vasa-like gene (Oyvlg), specifically expressed in oyster germ cells. In vivo injection of oyvl-dsRNA into the gonad provokes a knockdown phenotype corresponding to germ cell underproliferation and prematurely arrested meiosis througout the organ. The most severe phenotype observed is sterile. This knockdown phenotype is associated with a decrease in Oyvlg mRNA level of between 39% and 87%, and a strong reduction in OYVLG protein, to an undetectable level. Therefore, Oyvlg appears to be essential for germ cell development in Crassostrea gigas,...
Tipo: Text
Palavras-chave: Vasa; RNAi; Marine bivalve; Germline; Crassostrea gigas.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6641.pdf

Rapport annuel 1985
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
L'année 1985 a été la première année de fonctionnement de l'IFREMER créé par le décret du 5 juin 1984. Le rapport d'activité de cette année prend en compte les événements marquants résultant des nouvelles orientations de l'établissement, selon les missions assignées à l'IFREMER : " conduire et promouvoir des recherches fondamentales et appliquées et des actions de développement technologique et industriel destinées à connaître, évaluer et mettre en valeur les ressources des océans et à rationaliser leur exploitation, à améliorer les méthodes de prospection et de mise en valeur de l'environnement marin et à favoriser le développement socio-économique du monde maritime ". Par ailleurs le travail de l'établissement a compris une réflexion pour la mise en...
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/rapport-4835.pdf

Fichier technique des estuaires bretons - Rivière de Pont-L'Abbé
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ,.
Tipo: Text
Ano: 1975
URL: http://archimer.ifremer.fr/doc/00081/19178/16773.pdf

Transcriptome and Peptidome Characterisation of the Main Neuropeptides and Peptidic Hormones of a Euphausiid: The Ice Krill, Euphausia crystallorophias
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Toullec, Jean-yves; Corre, Erwan; Bernay, Benoit; Thorne, Michael A. S.; Cascella, Kevin; Ollivaux, Celine; Henry, Joel; Clark, Melody S.
Background:  The Ice krill, Euphausia crystallorophias is one of the species at the base of the Southern Ocean food chain. Given their significant contribution to the biomass of the Southern Ocean, it is vitally important to gain a better understanding of their physiology and, in particular, anticipate their responses to climate change effects in the warming seas around Antarctica.  Methodology/Principal Findings:  Illumina sequencing was used to produce a transcriptome of the ice krill. Analysis of the assembled contigs via two different methods, produced 36 new pre-pro-peptides, coding for 61 neuropeptides or peptide hormones belonging to the following families: Allatostatins (A, B et C), Bursicon (a and b), Crustacean Hyperglycemic Hormones (CHH and...
Tipo: Text
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00293/40444/39080.pdf

Réseau de surveillance benthique (REBENT) – Région Bretagne. Approche sectorielle subtidale : Identification et caractérisation des habitats benthiques du secteur Morlaix
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ehrhold, Axel; Hamon, Dominique; Chevalier, Claire.
In 2000, Ifremer launched and coordinated the development of a monitoring strategy for the REBENT network (REseau BENThique) in order to assess the aftermath of the “Erika” oil spill which took place in December 1999. Its aim is to provide consistent baseline knowledge on coastal benthic habitats, as well as to develop a monitoring tool that detects changes at various spatial and temporal scales. Sector-based seabed habitat mapping in shallow water (&lt; 50 m deep), is currently being conducted throughout Brittany's coastal waters using a combination of geoacoustic marine systems together with ground-truthing using biological grab sampling and seabed observations. Due to the overlap of soft and rocky bottoms, and contrasting hydrological conditions, the...
Tipo: Text
Palavras-chave: Rebent; Baie de Morlaix; Cartographie d’habitats; Sonar latéral; Macrofaune benthique; Peuplements; Dynamique sédimentaire; Figures sédimentaires; Rebent; Morlaix bay; Mapping; Sidescan sonar; Benthic macrofauna; Communities; Bedload transport; Bedforms.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00152/26276/24360.pdf

Spatial and temporal variations in pCO2 and atmospheric CO2 exchanges in a temperate salt marsh system
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mayen, Jeremy.
Coastal environments such as the Charentais Sounds are key systems in the biogeochemical cycles coupling (C, N, P) between the land, the ocean and  the atmosphere. Within the coastal zone, salt marshes are considered as CO2 sinks associated to their significant autotrophic metabolism and sediment carbon (C) storage. However, this ecological functioning is more and more threatened by global change (acidification, sea level rise, eutrophication) and anthropogenic pressures decreasing blue C area potential worldwide. C dynamics over salt marshes are complex since various processes and fluxes take place at the different terrestrial-aquatic-atmospheric exchange interfaces at the spatio-temporal scales of the coastal zone. The ANR-PAMPAS research project allows...
Tipo: Text
Palavras-chave: Temperate salt marsh system; Typology/management practice; Water carbon dynamic; Water-atmosphere CO2 flux; Biological pump; Hydrodynamic advection; CO2 source/sink.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00636/74772/74924.pdf

Rapport annuel 2006
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
2006 a vu l'Ifremer évoluer dans un contexte porteur pour les sciences marines. L'élaboration par la Commission européenne d'un Livre vert sur une stratégie marine européenne intégrée qui fait, dans le cadre de la stratégie de Lisbonne sur l'économie de la connaissance, largement référence à la recherche et à son nécessaire développement, a ouvert pour un an, et jusqu'en juin 2007 un large débat auquel l'Ifremer s'est attaché à contribuer d'abord en son sein, mais aussi avec la communauté océanographique française, ainsi qu'avec nos partenaires européens. Parallèlement, la conclusion des travaux du groupe Poséidon, créé par le Secrétariat général de la mer et par le Centre d'analyse stratégique a permis à la communauté maritime française dans son ensemble...
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/rapport-4833.PDF

Contribution d'un film bacterien a la culture intensive de Daphnia magna
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Langis, R; Proulx, D; Lanoue De La, J; Couture, P.
Laboratory scale experiments show that can increase of the biofilm in cultivation tanks improves significantly the productivity of Daphnia
Tipo: Text
Palavras-chave: Daphnia magna; Branchiopoda; Bacteria; Detoxification; Nutrition; Interspecific relationships.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/acte-1411.pdf

Cultures et élevages de masse dans le contexte d'une écloserie-nurserie de mollusques bivalves : les productions phytoplanctoniques et le grossissement des post-larves
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Borgne, Y.; Marin, J.; Vergonzanne, G.
The hatchery-nursery from the Société Atlantique de Mariculture settled in Barfleur studied within the ECOTRON program set up by C.N.E.X.O. the characteristics of mass cultures for monospecific phytoplancton and of the rearing of oyster spat (Ostrea edulis. Crassostrea giqas) and clam spat (Venerupis semi­decussata) . The maintenance features of the cultures in order to obtain cell densities around 1 million cell/ml. (or 50 g. of dry weight/m3) in containers up to 5000 liters have been established for the main species used in aquaculture (Isochrysis qalbana. Monochrysis lutheri, Tetraselmis suecica. Skeletonema costatum. Phaeodactylum tricornutum. Cyclotella nana, Chaetoceros calcitrans). The spat growth in nursery without providing any cultured food...
Tipo: Text
Palavras-chave: Écloserie; Nurserie; Phytoplancton; Bivalves; Naissain; Hatchery; Nursery; Phytoplancton; Bivalves; Spat.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/00305/41658/40867.pdf

L'homme et les ressources halieutiques. Essai sur l'usage d'une ressource commune renouvelable
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Troadec, Jean-paul.
The full exploitation of the world fishery resources has drastically modified the prospects and conditions for progress in fisheries. It was detenninant in the change of the Ocean Regime. Moreover, it widened considerably the range of issues which have to be addressed for an efficient use of marine living resources. Assessment approaches for complex fisheries, carrying capacity of basins and management of bivalve mollusc stocks, natural variability of fish stocks and management implications, methods for access regulation, economic rent, resources and use rights allocation, nature of aitisanal fisheries, strategies for fishery development in Third World countries, international dimensions of fisheries, etc. are among the issues reviewed in this book by...
Tipo: Text
Palavras-chave: Pisces; Mollusca; Economy; Marine living resource; Fishery.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/rapport-1511.pdf

Rapport de mission à Terre-Neuve (campagne 1928) (première partie)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Beauge, X.
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1929
URL: http://archimer.ifremer.fr/doc/1929/publication-5794.pdf

Les couches diffusantes du golfe de Gascogne : caractérisation acoustique, composition spécifique et distribution spatiale
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Remond, Barbara.
Fisheries acoustic data are continuously collected during ecosystemic surveys to detect sh schools of commercial species and to quantify the sh abundance. These multifrequency data also contain information about smaller target aggregations producing ubiquitous Sound Scat- tering Layers (SSLs) on the echograms, with quite diverse shape, frequency responses and taxonomic compositions. In this work, we focus on the SSLs observed in spring in the Bay of Biscay during the PELGAS surveys. The objectives are: i) to classify SSLs, ii) to describe their spatial meso-scale distribution, iii) to investigate their relationships with oher exosystme components, and iv) to investigate the taxonomic composition of resonant SSLs at ne scale. A Multiple Correspondence...
Tipo: Text
Palavras-chave: Acoustique; Multifréquences; Couches diffusantes; Micronecton; Golfe de Gascogne; PELGAS; Acoustic; Multifrequency; Sound scattering layers; Micronekton; Bay of Biscay; PELGAS.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00267/37784/35859.pdf

Acquisition de données en vidéo sous-marine sur les ulves offshore de la baie de Douarnenez
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lunven, Michel; Le Gall, Erwan; Gaffet, Jean-dominique.
In the Bay of Douarnenez, assessments of the offshore ulva stock have been carried out in 2004 and 2005 using some submarine video techniques. Altogether, 4 campaigns have been conducted during this period of time, enabling an estimate of the ulva biomass lying on the ocean bed, off the tidal zone, at depths of 2 to 20 metres.
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/rapport-6325.pdf

OUTPACE long duration stations: physical variability, context of biogeochemical sampling, and evaluation of sampling strategy
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: De Verneil, Alain; Rousselet, Louise; Doglioli, Andrea M.; Petrenko, Anne A.; Maes, Christophe; Bouruet-aubertot, Pascale; Moutin, Thierry.
Research cruises to quantify biogeochemical fluxes in the ocean require taking measurements at stations lasting at least several days. A popular experimental design is the quasi-Lagrangian drifter, with in situ incubations that follow the flow of water over time. The ship then tracks the drifter because subsequent measurements are supposed to remain in the same water environment. An outstanding question is how to best determine whether this is true. During the Oligotrophy to UlTra-oligotrophy PACific Experiment (OUTPACE) cruise, from 18 February to 3 April 2015 in the western tropical South Pacific, three separate stations of long duration (five days) over the upper 500 m were conducted in this quasi-Lagrangian sampling scheme. Here we present physical...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00420/53122/54075.pdf

ENSO signals in the vicinity of New Caledonia, South Western Pacific
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Delcroix, T; Lenormand, O.
Data collected in an area enclosing New Caledonia are analysed both for the open ocean (17 degrees S-27 degrees S, 169 degrees E-170 degrees E; 1972-1992) and for one point in its lagoon (1967-1993), in order to improve our knowledge of the regional environment, with emphasis on seasonal and interannual (i.e. ENSO) variability. Long-term means and seasonal changes in surface wind, sea-surface temperature and salinity, and 0-400 m temperature, salinity and zonal geostrophic current are first described to Set the context. Through comparisons with the Southern Oscillation Index (SOI), it is demonstrated that there are signals in these parameters that are connected with ENSO. During the warm phase of ENSO (SOI &lt; 0, El Nino), we observed saltier-than-average...
Tipo: Text
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00093/20410/18077.pdf

Synthèse des impacts par composante de l’écosystème. Sous-région marine Mers celtiques. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: AAMP. Équipe de coordination DCSMM.
Tipo: Text
Palavras-chave: Mers celtiques; Écosystèmes; Pressions; Impacts; Synthèse.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00329/43984/43556.pdf

Generation of a magnetic field by dynamo action in a turbulent flow of liquid sodium
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Monchaux, R.; Berhanu, M.; Bourgoin, M.; Moulin, M.; Odier, Ph.; Pinton, J. -f.; Volk, R.; Fauve, S.; Mordant, N.; Petrelis, F.; Chiffaudel, A.; Daviaud, F.; Dubrulle, B.; Gasquet, C.; Marie, Louis; Ravelet, F.
We report the observation of dynamo action in the von Karman sodium experiment, i.e., the generation of a magnetic field by a strongly turbulent swirling flow of liquid sodium. Both mean and fluctuating parts of the field are studied. The dynamo threshold corresponds to a magnetic Reynolds number R-m similar to 30. A mean magnetic field of the order of 40 G is observed 30% above threshold at the flow lateral boundary. The rms fluctuations are larger than the corresponding mean value for two of the components. The scaling of the mean square magnetic field is compared to a prediction previously made for high Reynolds number flows.
Tipo: Text
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00253/36472/35017.pdf

Lee region of Gran Canaria
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Barton, Ed; Basterretxea, G; Flament, Pierre; Mitchelson-jacob, Eg; Jones, B; Aristegui, J; Herrera, F.
The mountainous Canary Islands present obstacles to the trade winds and to the Canary Current flowing equatorward past them. In situ observations of hydrographic properties and surface winds south of Gran Canaria, together with advanced very high resolution radiometer and synthetic aperture radar images during 2 weeks in summer 1995 are analyzed, A cyclonic eddy shed from the west of the island drifted southwestward at 5 cm s(-1), while the southeast coast was approached by an upwelling filament originating: off NW Africa. A wind lee region bounded by intense horizontal sheer lines had a weak return islandward wind in its center. The lee formed a triangular, diurnally varying, warm water pool with two sea surface temperature maxima separated by lower...
Tipo: Text
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00000/10502/9400.pdf

Prospection et pêche des thons au large des côtes de Provence, de Corse et dans le golfe de Gênes (Résultats d'observations faites de 1948 à 1963)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gougelet, Pierre.
En 1946, j'ai commencé à pratiquer régulièrement la pêche au chalut au large des côtes orientales de Corse tout en restant basé à Nice ; j'ai ainsi été amené à faire, trois à quatre fois par mois, l'aller et retour entre mon port d'attache et les lieux de pêche. Les deux premières années, au cours de ces voyages, l'habitude était de placer à l'arrière du bâteau une ligne traînante munie de cuillère, mais il n'y avait jamais de capture de thon. Les petits caboteurs qui à partir de 1948 firent régulièrement la ligne Marseille-Nice-la Corse, montrèrent qu'il était possible de prendre des thons aux lignes traînantes dans notre région. Les membres des équipages, originaires des ports de la côte atlantique, utilisaient des lignes en chanvre de 3 mm, longues de...
Tipo: Text
Ano: 1964
URL: http://archimer.ifremer.fr/doc/1964/publication-7225.pdf

Contribution à l'étude du genre Pseudoscopelus (Chiasmodontidae) avec une espèce nouvelle, P. pierbartus n. sp., deux synonymies junior et une clé d'identification des espèces valides
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Spitz, J; Quero, Jean-claude; Vayne, Jean-jacques.
The genus Pseudoscopelus Lutken, 1892 is easily distinguished from the other Chiasmodontidae by the presence of well-defined rows of photophores. Until 2005, eight species were known. Pseudoscopelus scriptus was the first described by Lutken in 1892, then P. sagamianus by Tanaka in 1908, P. stellatus by Beebe in 1932 and P. altipinnis by Parr in 1933. Later in 1934, Fowler described three new species: P. microps, P. cephalus, and P. obtusifrons. These three species, known from only one specimen each, have not been recorded since. Lastly, an easily distinguishable species, P. scutatus, was discovered by Krefft in 1971. In a recent review, Prokoviev and Kukuev (2005, 2006) confirmed the validity of all species and described a new one P. aphos,...
Tipo: Text
Palavras-chave: Taxonomy; Junior synonymy; New species; ANE; P. pierbartus n. sp.; Pseudoscopelus; Chiasmodontidae.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3628.pdf

Comparaison de l'hétérotrophie phytoplanctonique en laboratoire et in situ : efflorescence estivale en eau côtière et populations printanières en mer stratifiée
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Arzul, Genevieve; Videau, Christiane; Bodennec, Guy; Crassous, Marie-pierre; Youenou, Agnes.
Pour mieux connaître les facteurs qui agissent sur les interactions trophiques entre le phytoplancton et le milieu nutritif, nous avons étudié la capacité hétérotrophe du phytoplancton en conditions contrôlées, non axéniques, au laboratoire. Les expériences réalisées avec la [U-14C] glutamine, étaient basées sur l'étude des vitesses d'assimilation. Les résultats obtenus avec deux espèces du genre Gymnodinium et une diatomée ont été vérifiés lors d'efflorescences en eau côtière et estuarienne, montrant l'adaptation des algues au milieu riche en substances organiques et leur capacité hétérotrophe en fonction de l'éclairement. L'effet de l'éclairement sur la capacité phagotrophe de Gymnodinium a été observé au laboratoire. L'étude réalisée sur les particules...
Tipo: Text
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00105/21599/19179.pdf

Culturing marine bacteria - an essential prerequisite for biodiscovery
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Joint, Ian; Mühling, Martin; Querellou, Joel.
The potential for using marine microbes for biodiscovery is severely limited by the lack of laboratory cultures. It is a long-standing observation that standard microbiological techniques only isolate a very small proportion of the wide diversity of microbes that are known in natural environments from DNA sequences. A number of explanations are reviewed. The process of establishing laboratory cultures may destroy any cell-to-cell communication that occurs between organisms in the natural environment and that are vital for growth. Bacteria probably grow as consortia in the sea and reliance on other bacteria for essential nutrients and substrates is not possible with standard microbiological approaches. Such interactions should be considered when designing...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00035/14631/11950.pdf

Fécondité des saumons de plusieurs hivers de la Nive
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Prouzet, Patrick; Martinet, J. P.
1. Captures des géniteurs Les saumons ont été capturés sur la Nive au barrage de Chopolo situé sur le cours inférieur à proximité de la localité d'Ustaritz (figure 1).  Cette opération a été réalisée à l’aide d’une trappe de capture aménagée dans le bassin supérieur de la passe à ralentisseurs.  En tout 20 géniteurs ont été capturés sous la responsabilité du CSP et de l'INRA durant la période d'autorisation de capture du 10 mai au 31 juillet 1988. Sur ces 20 saumons, on comptait 19 femelles pour un mâle. Une des femelles était marquée et provenait d'un repeuplement effectué sur la Nivelle par l'INRA. Elle a été de ce fait écartée du lot.
Tipo: Text
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00068/17940/15475.pdf

Neogene evolution of the mixed carbonate-siliciclastic system in the Gulf of Papua, Papua New Guinea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tcherepanov, Evgueni N.; Droxler, Andre W.; Lapointe, Philippe; Dickens, Gerald R.; Bentley, Sam J.; Beaufort, Luc; Peterson, Larry C.; Daniell, James; Opdyke, Bradley N.
This paper outlines the evolution of the late Cenozoic mixed carbonate-siliciclastic depositional system in the Gulf of Papua (GoP), using seismic, gravity, multibeam bathymetry, well data sets, and Landsat imagery. The deposition of the mixed sedimentary sequences was influenced by dynamic interplay of tectonics, eustasy, in situ carbonate production, and siliciclastic sediment supply. The roles of these major factors are estimated during different periods of the GoP margin evolution. The Cenozoic mixed system in the GoP formed in distinct phases. The first phase ( Late Cretaceous-Paleocene) was mostly driven by tectonics. Rifting created grabens and uplifted structural blocks which served later as pedestals for carbonate edifices. Active neritic...
Tipo: Text
Palavras-chave: Great barrier reef; Sea level; Tectonic controls; Ice volume; Platforms; Sedimentation; Fluctuations; Deposition; Australia; Foreland basin.
Ano: 2008
URL: https://archimer.ifremer.fr/doc/00208/31939/30357.pdf

Influence of environment factors on bacterial ingestion rate of the deposit-feeder Hydrobia ulvae and comparison with meiofauna
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pascal, Pierre-yves; Dupuy, C; Richard, P; Haubois, A.g.; Niquil, N.
Deposit feeders are able to process a considerable volume of sediment, containing large quantities of associated bacteria. However, conclusions concerning the trophic role played by benthic bacteria in marine sediments are still not fully elucidated. This study deals with bacterivory by the gastropod Hydrobia ulvae, one of the most abundant deposit-feeding species in intertidal mudflats in Western Europe. Ingestion rates of bacteria were determined during grazing experiments using 15N preenriched bacteria. Grazing experiments were performed in order to measure effects of abiotic (temperature, salinity and luminosity) and biotic (bacterial and algal abundances) factors on ingestion rates of bacteria by H. ulvae of an intertidal mudflat (Brouage,...
Tipo: Text
Palavras-chave: Mudflat; Nematodes; Ammonia tepida; Environmental factors; Grazing; Bacteria; Gastropod; Hydrobia ulvae; Deposit feeding.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4781.pdf

Observation et Surveillance du Phytoplancton et de l’Hydrologie en France métropolitaine, dans le cadre du REPHY et des réseaux régionaux SRN, RHLN, ARCHYD et RSLHYD. Etat des lieux octobre 2016.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Belin, Catherine.
L’observation et la surveillance du phytoplancton et de l’hydrologie dans les eaux littorales françaises sont assurées à Ifremer par le REPHY sur l’ensemble du littoral, celui‐ci étant complété dans certaines régions par des réseaux régionaux : SRN Suivi Régional des Nutriments, en Artois Picardie, RHLN Réseau Hydrologique du Littoral Normand, ARCHYD Arcachon Hydrologie, RSLHYD/OBSLAG Observatoire Lagunes en Méditerranée. Le tome 2 détaille les lieux de prélèvement du REPHY et des réseaux régionaux, avec des fiches par lieu et une cartographie simplifiée.
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00393/50392/51104.pdf

FerryBoxes within Europe: State-of-the-art and Integration in the European Ocean Observation System (EOOS)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Petersen, W; Colijn, F; Gorringe, P; Kaitala, S; Karlson, B; King, A; Lips, U; Ntoumas, M; Seppala, J; Sorensen, K; Petihakis, G; Petit De La Villeon, Loic; Wehde, H.
Tipo: Text
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00450/56150/57691.pdf

Variablility of stable isotope signatures (delta C-13 and delta N-15) in two spider crab populations (Maja brachydactyla) in Western Europe
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bodin, Nathalie; Le Loch, Francois; Hily, Christian; Caisey, Xavier; Latrouite, Daniel; Le Guellec, Anne-marie.
The ontogenic variations of nitrogen and carbon stable isotopic signatures (delta N-15 and delta C-13) were investigated in two spider crab (Maja brachydactyla) populations inhabiting in different biotopes of Western Europe. The Iroise Sea population is localized in Western Brittany and characterized by a seasonal migration occurring on a large bathymetric and habitat gradient while the Seine Bay population, in the Eastern English Channel, remains in a more homogeneous environment during its migration. In the Iroise Sea population, delta C-13 Values increased significantly both with body size and age, revealing a shift towards "benthic-component" prey with spider crab growth. On the contrary, neither body size nor ageing gave rise to a significant trophic...
Tipo: Text
Palavras-chave: Migration; Marine decapod crustaceans; Growth; Feeding; Carbon and nitrogen stable isotopes.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2535.pdf

Deepwater circulation variation in the South China Sea since the Last Glacial Maximum
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Zheng, Xufeng; Kao, Shuhji; Chen, Zhong; Menviel, Laurie; Chen, Han; Du, Yan; Wan, Shiming; Yan, Hong; Liu, Zhonghui; Zheng, Liwei; Wang, Shuhong; Li, Dawei; Zhang, Xu.
Deepwater circulation plays a central role in global climate. Compared with the Atlantic, the Pacific deepwater circulation's history remains unclear. The Luzon overflow, a branch of the North Pacific deep water, determines the ventilation rate of the South China Sea (SCS) basin. Sedimentary magnetic properties in the SCS reflect millennial-scale fluctuations in deep current intensity and orientation. The data suggest a slightly stronger current at the Last Glacial Maximum compared to the Holocene. But, the most striking increase in deep current occurred during Heinrich stadial 1 (H1) and to a lesser extent during the Younger Dryas (YD). Results of a transient deglacial experiment suggest that the northeastern current strengthening at the entrance of the...
Tipo: Text
Palavras-chave: South China Sea; Deep current; Anisotropy of magnetic susceptibility; Heinrich 1; Atlantic-Pacific seesaw.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00421/53224/54800.pdf

Trophic structure of vermetid reef community: High trophic diversity at small spatial scales
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Colombo, Francesca; Costa, Valentina; Dubois, Stanislas; Gianguzza, Paola; Mazzola, Antonio; Vizzini, Salvatrice.
Stable isotopes were used to investigate contributions of autochthonous (i.e. benthic: epilithon and macroalgae) and allochthonous (i.e. pelagic: phytoplankton) organic matter sources to the diet of suspension-feeders, grazers and predators associated to small reef-pools (cuvettes) created by the reef-building species Dendropoma petraeum in the north-western coast of Sicily (Italy). Contributions of potential food sources were calculated using Bayesian mixing-models and integrated to a multivariate approach to highlight the diversity of C and N pathways within Dendropoma cuvettes. Both pelagic and benthic organic matter sources were exploited by benthic consumers, although clear differences were revealed in the various species depending on their feeding...
Tipo: Text
Palavras-chave: Dendropoma petraeum; Stable Isotope; Bayesian Mixing Model; Trophic Niche; Intertidal.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00130/24103/22855.pdf

Fluctuations d'abondance de l'ichtyoplancton sur une zone frontale cotiere (Golfe de Gascogne: Baie d'Audierne)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Camus, Patrick; Delpech, Jean-paul; Omnes, Marie-helene; Mastail, Max.
A two years ichthyoplankton sampling program over an eight station network on each side of a coastal tidal front was conducted twice a month during neap tides. A principal component analysis was performed on the data (taxa and observations) which were segregated during the summer into two groups of taxa related to two groups of stations belonging to two different hydrodynamical areas. In July and August 1980 during a tide cycle, zooplankton was investigated at two stations in the stratified and transitional area. Periodic fluctuations of meroplanktonic taxa correlated to the movement of the front induced by the tide were observed.
Tipo: Text
Palavras-chave: Ichthyoplancton; Front; Golfe de Gascogne; Analyse en composantes principales; Ichthyoplankton; Tidal front; Bay of Biscay; Principal component analysis.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/00069/17991/15525.pdf

Regulation of a truncated isoform of AMP-activated protein kinase alpha (AMPKalpha) in response to hypoxia in the muscle of Pacific oyster Crassostrea gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guevelou, Eric; Huvet, Arnaud; Sussarellu, Rossana; Milan, Massimo; Guo, Xinmei; Li, Li; Zhang, Guofan; Quillien, Virgile; Daniel, Jean-yves; Quere, Claudie; Boudry, Pierre; Corporeau, Charlotte.
AMP-activated protein kinase α (AMPKα) is a key regulator of energy balance in many model species during hypoxia. In a marine bivalve, the Pacific oyster Crassostrea gigas, we analyzed the protein content of adductor muscle in response to hypoxia during 6 h. In both smooth and striated muscles, the amount of full-length AMP-activated protein kinase α (AMPKα) remained unchanged during hypoxia. However, hypoxia induced a rapid and muscle-specific response concerning truncated isoforms of AMPKα. In the smooth muscle, a truncated isoform of AMPKα was increased from 1 to 6 h of hypoxia, and was linked with accumulation of AKT kinase, a key enzyme of the insulin signaling pathway which controls intracellular glucose metabolism. In this muscle, aerobic metabolism...
Tipo: Text
Palavras-chave: Marine bivalve; Crassostrea gigas; Hypoxia; AMP-activated protein kinase; Alternative splicing; Adductor muscle.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00119/22998/21397.pdf

Effect of Salinity and Nitrogen Form in Irrigation Water on Growth, Antioxidants and Fatty Acids Profiles in Halophytes Salsola australis, Suaeda maritima, and Enchylaena tomentosa for a Perspective of Biosaline Agriculture
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Certain, Cassandre; Della Patrona, Luc; Gunkel-grillon, Peggy; Leopold, Audrey; Soudant, Philippe; Le Grand, Fabienne.
Cultivation of salt-tolerant crops help to face to irreversible global salinization of freshwater and soils. In New-Caledonia, three halophytes are candidates for saline crops, Salsola australis R.Br., Suaeda maritima (L.) Dumort and Enchylaena tomentosa R.Br. Their success and quality depend yet on availabilities of salinity and essential nutrients in agrosystems. So, we investigated effects of three salinities, i.e., control moderate and high, and five nitrogen ratios, i.e., 100:0, 75:25, 50:50, 25:75 or 0:100 NO3−-N:NH4+-N ratio on their growth and functional value for fatty acids and antioxidants. Results show that the leaf fatty acid and antioxidant profiles of species, emphasize their good potential to become functional crop products, based on...
Tipo: Text
Palavras-chave: Halophyte; Salsola australis; Suaeda maritima; Enchylaena tomentosa; Salt tolerance; Nitrogen form; Fatty acid; Phenolic compounds; Antioxidant activity.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00682/79411/81960.pdf

REMONOR : Résultats 2006. Evaluation de la mortalité, croissance et qualité des huîtres creuses
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ropert, Michel; Pien, S.; Mary, Charlotte; Bouchaud, B.
Le réseau régional de suivi REMONOR s'appuyant sur les acquis du réseau national REMORA de l'Ifremer, évalue chaque année la mortalité, la croissance et la qualité sur deux classes d'âges d'huîtres creuses (« adultes » = 2 ans et « juvéniles » = 1 an), réparties entre différentes stations dans les principaux secteurs ostréicoles Bas-Normands.  Ce réseau, mené en collaboration par le LERN (Laboratoire Environnement Ressources de Normandie) et le SMEL (Syndicat Mixte de L'Equipement du Littoral), intègre deux nouvelles stations en 2006 : Veules les Roses (VR01), dont le suivi, allégé l'an dernier, est aujourd'hui complet et Denneville (CO10) qui doit compléter les connaissances sur le nord de la Côte Ouest du Cotentin. Une station est à l'étude cette année...
Tipo: Text
Palavras-chave: REMORA; Quality; Growth; Mortality; Normandy; REMONOR; Cupped (gigas) oyster; Crassostrea gigas; REMORA; Qualité; Croissance; Mortalité; Basse Normandie; REMONOR; Huître creuse; Crassostrea gigas.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/rapport-3468.pdf

Programme LIFE DG XI. Suivi de l'expansion de l'algue Caulerpa taxifolia. Actions menées par l'IFREMER
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Belsher, Thomas.
DÉFINITION DU PROGRAMME : Au début de l'année 1992, à la demande du Ministère de la Mer, une réunion s'est tenue au siège de l'Ifremer. Présidée par son Directeur de l'Environnement, elle a proposé un programme d'intervention et arrêté le principe d'un suivi de l'expansion. La Commission interministérielle de la mer a par la suite, décidé de lancer un programme national. Dans le cas d'un début de colonisation, les questions essentielles, afin de décider des moyens à mettre en œuvre, sont les suivantes: - quelle est son ampleur ? - quelles sont ses limites bathymétriques? - quelle est sa dynamique? quels sont les moyens de la limiter? L'Ifremer participant à deux programmes européens LIFE DGXI (1993-1995 et 1996-1998) coordonnés par le Pr. C.F. Boudouresque...
Tipo: Text
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00075/18623/16173.pdf

Flottille des Senneurs (hors thon rouge). Façade Méditerranée. 2018. Synthèse des flottilles de pêche.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d’Informations Halieutiques » (SIH) de l’Ifremer, qui constitue le réseau d’observation des ressources halieutiques et des usages associés. Ce projet s’inscrit dans la mission de service d’intérêt public de l’Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l’analyse du secteur des pêches, le SIH a en charge l’élaboration d’indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche et du grand public.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00613/72529/71491.pdf

The Impossible Sustainability of the Bay of Brest? Fifty Years of Ecosystem Changes, Interdisciplinary Knowledge Construction and Key Questions at the Science-Policy-Community Interface
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ragueneau, Olivier; Raimonet, Melanie; Maze, Camille; Coston-guarini, Jennifer; Chauvaud, Laurent; Danto, Anatole; Grall, Jacques; Jean, Frederic; Paulet, Yves-marie; Thouzeau, Gerard.
In this contribution, the study of the Bay of Brest ecosystem changes over the past 50 years is used to explore the construction of interdisciplinary knowledge and raise key questions that now need to be tackled at the science-policy-communities interface. The Bay of Brest is subject to a combination of several aspects of global change, including excessive nutrient inputs from watersheds and the proliferation of invasive species. These perturbations strongly interact, affecting positively or negatively the ecosystem functioning, with important impacts on human activities. We first relate a cascade of events over these five decades, linking farming activities, nitrogen, and silicon biogeochemical cycles, hydrodynamics of the Bay, the proliferation of an...
Tipo: Text
Palavras-chave: Sustainability; Land-ocean continuum; Bay of Brest; Interdisciplinarity; Science-policy-community interface.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00616/72792/72272.pdf

REDRISK - Réduction of risk in shellfish harvesting areas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Seafoodplus.
The strategic impact of the SEAFOODplus project is to provide evidence to enable improved production of safe, nutritious and high - quality seafood products reduce occurence ofmajor diseases and increase the well - being of European consumers. Altough seafood generally regarded as a wholesome, safe and nutritious food it may poseconsumer risks on occasion. RDT Pillar 3 addresses research towards identifying and reducing the risks posed by seafood and thus the health and well being of theseafood consumer. Fromreviews of the international epidemiological data, it is clear that inseafood the most clearly identified consumer risks are from human enteric viruses contaminating bivalve mollucs, pathogenicbacteria e.g Vibrio species, the formation of biogenic...
Tipo: Text
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00049/16072/13539.pdf

Seasonal Variation of Lipids and Fatty Acids of the Microalgae Nannochloropsis oculata Grown in Outdoor Large-Scale Photobioreactors
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Olofsson, Martin; Lamela, Teresa; Nilsson, Emmelie; Berge, Jean-pascal; Del Pino, Victoria; Uronen, Pauliina; Legrand, Catherine.
While focus in oil-producing microalgae is normally on nutrient deficiency, we addressed the seasonal variations of lipid content and composition in large-scale cultivation. Lipid content, fatty acid profiles and mono- di- and triglycerides (MAGs, DAGs, and TAGs) were analyzed during May 2007-May 2009 in Nannochloropsis oculata grown outdoors in closed vertical flat panels photobioreactors. Total lipids (TL) ranged from 11% of dry weight (DW) in winter to 30% of DW in autumn. 50% of the variation in TL could be explained by light and temperature. As the highest lipid content was recorded during autumn indicating an optimal, non-linear, response to light and temperature we hypothesize that enhanced thylakoid stacking under reduced light conditions resulted...
Tipo: Text
Palavras-chave: Biodiesel; Microalgae; Seasonal variation; Nannochloropsis oculata; Large-scale; Lipids; Fatty acids; Light; Temperature.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00085/19582/17206.pdf

Eléments de biologie larvaire et postlarvaire de mollusques bivalves en milieu naturel et conditions contrôlées
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Robert, Rene.
Tipo: Text
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00090/20148/17798.pdf

Extreme sea states and wave breaking characterization for MRE activities
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Filipot, Jean-francois; The Dime Group,.
This paper presents a eld experiment part of the DiMe project and aiming at capturing extreme sea states with a focus on their wave breaking properties. These observations collected from La Jument lighthouse, are intended to help in re ning the design conditions for Marine Renewable Energy (MRE) Converters. Preliminary analyses from the eld observations are presented, which include stereo-video, x-band radar and accelerometers data.
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00647/75873/76869.pdf

Etude des sources d'alimentation potentielles des larves de l'huître perlière à l'échelle d'un lagon des Tuamotu, Ahe (Polynésie Française)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mazzella, Audrey.
This work is part of a general study aiming at the modelling growth and dispersion of the larvae of Pinctada margaritifera in the lagoon of Ahe atoll (Tuamotu, French Polynesia). The general objective of this study is to set up a model coupling the growth and the dispersal of chlorophyll and particulate matter according to different spatial and temporal scales. Totally 1111 samples were taken in 12 stations from April 21st to May 28th, 2007. The speed and the direction of the wind bad a significant effect on the different parameters. The depth has not influence on the variations of the chlorophyll and the particulate matter that of their quality descriptors (proportion of cells lower than 2 µm, that of the phaeopigments and the organic matter). A...
Tipo: Text
Palavras-chave: Ahe; Collectage; Temporel; Spatial; Chlorophylle; Phéopigments; Matières en suspension; Matière minérale; Matière organique.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00426/53794/54709.pdf

Long-term dietary-exposure to non-coplanar PCBs induces behavioral disruptions in adult zebrafish and their offspring
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pean, Samuel; Daouk, Tarek; Vignet, Caroline; Lyphout, Laura; Leguay, Didier; Loizeau, Veronique; Begout, Marie-laure; Cousin, Xavier.
The use of polychlorinated biphenyls (PCBs) has been banned for several decades. PCBs have a long biological half-life and high liposolubility which leads to their bioaccumulation and biomagnification through food chains over a wide range of trophic levels. Exposure can lead to changes in animal physiology and behavior and has been demonstrated in both experimental and field analyses. There are also potential risks to high trophic level predators, including humans. A maternal transfer has been demonstrated in fish as PCBs bind to lipids in eggs. In this study, behavioral traits (exploration and free swimming, with or without challenges) of contaminated zebrafish (Danio rerio) adults and their offspring (both as five-day-old larvae and as two-month-old fish...
Tipo: Text
Palavras-chave: Exploration; Swimming activity; Organic pollutant effects; Generation; Video analysis.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00167/27799/26068.pdf

Approches bibliographique et expérimentale de méthodes permettant d'évaluer l'état de maturité sexuelle des bivalves
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thielley, Maryse.
A l'heure actuelle, l'objectif des éc10series d'huîtres est d'atteindre une autonomie d'approvisionnement en larves quelle que soit la saison et donc d'étaler les émissions de gamètes sur toute l'année. A la suite de problèmes rencontrés pour atteindre cet objectif, il s'est avéré nécessaire d'entreprendre des études sur les méthodes à mettre en oeuvre pour contrôler la qualité de la reproduction en écloserie et notamment l'état de maturité des géniteurs. Notre étude porte sur ce dernier point. Une étude bibliographique présente les différentes méthodes plus ou moins précises, actuellement utilisées pour contrôler l'état de maturité des gonades de bivalves. La majorité d'entre elles nécessite le sacrifice d'animaux. Une approche expérimentale portant...
Tipo: Text
Palavras-chave: Crassostrea gigas; Bivalves; Reproduction; Maturité sexuelle; Biopsie.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00419/53094/54051.pdf

A HMM-based model to geolocate pelagic fish from high-resolution individual temperature and depth histories: European sea bass as a case study
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Woillez, Mathieu; Fablet, Ronan; Tran-thanh Ngo,; Lalire, Maxime; Lazure, Pascal; De Pontual, Helene.
Numerous methods have been developed to geolocate fish from data storage tags. Whereas demersal species have been tracked using tide-driven geolocation models, pelagic species which undertake extensive migrations have been mainly tracked using light-based models. Here, we present a new HMM-based model that infers pelagic fish positions from the sole use of high-resolution temperature and depth histories. A key contribution of our framework lies in model parameter inference (diffusion coefficient and noise parameters with respect to the reference geophysical fields—satellite SST and temperatures derived from the MARS3D hydrodynamic model), which improves model robustness. As a case study, we consider long time series of data storage tags (DSTs) deployed on...
Tipo: Text
Palavras-chave: Fish movement; Archival tagging; Migration; Population structure; Hidden Markov Model (HMM); State-space model.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00300/41097/40270.pdf

Evolutionary Patterns in Pearl Oysters of the Genus Pinctada (Bivalvia: Pteriidae)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cunha, Regina L.; Blanc, Francoise; Bonhomme, Francois; Arnaud-haond, Sophie.
Pearl oysters belonging to the genus Pinctada (Bivalvia: Pteriidae) are widely distributed between the Indo-Pacific and western Atlantic. The existence of both widely distributed and more restricted species makes this group a suitable model to study diversification patterns and prevailing modes of speciation. Phylogenies of eight out of the 11 currently recognised Pinctada species using mitochondrial (cox1) and nuclear (18S rRNA) data yielded two monophyletic groups that correspond to shell size and presence/absence of hinge teeth. Character trace of these morphological characters onto the molecular phylogeny revealed a strong correlation. Pinctada margaritifera appears polyphyletic with specimens from Mauritius grouping in a different clade from others of...
Tipo: Text
Palavras-chave: Pinctada; Evolutionary patterns; Species complex; Allopatry; Biogeography.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00035/14635/14015.pdf

Report of the Scallop Assessment Working Group (WGScallop) ,10-12 October 2018 York, UK
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ICES.
The ICES Scallop Assessment Working Group (WGScallop) met in Aberdeen (2016), Belfast (2017) and York (2018) with an average of 16 participants from 8 countries. The main terms of reference for the working group were to update and provide data and exchange knowledge on the various scallop fisheries in the Northeast Atlantic region. This included the compilation of available scallop fisheries data and the production of maps to better identify stock boundaries and inform spatial management. The WG also considered the various assessments for scallop stocks and reviewed the recent developments in the English Channel. The scallop stocks in the Baie ds Seine have experienced extremely large recruitment events over the past few years and the group has discussed...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00472/58385/60950.pdf

Diversity, ecology, biogeography and evolution of the prevalent brown algal genus Lobophora in the greater Caribbean sea, including the description of five new species
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vieira, Christophe; Morrow, Kathleen; D'Hondt, Sofie; Camacho, Olga; Engelen, Aschwin H.; Payri, Claude E.; De Clerck, Olivier.
Distributed in tropical and warm‐temperate waters worldwide, Lobophora species are found across the Greater Caribbean (i.e., Caribbean sensu stricto, Gulf of Mexico, Florida, the Bahamas, and Bermuda). We presently discuss the diversity, ecology, biogeography and evolution of the Greater Caribbean Lobophora species based on previous studies and an extensive number of samples collected across the eastern, southern and to a lesser extent western Caribbean. A total of 18 Lobophora species are now documented from the Greater Caribbean, of which five are newly described (L. agardhii sp. nov., L. dickiei sp. nov., L. lamourouxii sp. nov., L. richardii sp. nov. and L. setchellii sp. nov.). Within the Greater Caribbean, the eastern Caribbean and the Central...
Tipo: Text
Palavras-chave: Cox3; Eastern Caribbean; Greater Caribbean; Lobophora; Molecular taxonomy; Western Caribbean.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00614/72570/71525.pdf

Estimating the North-Atlantic mean surface-topography by inversion of hydrographic and lagrangian data
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Traon, Pierre-yves; Mercier, Herle.
The non-linear inverse model described in Mercier et al. (1992) is used to estimate the mean surface topography of the North Atlantic and its formal error. The surface is based on a large hydrographic and Lagrangian data set and has spatial resolution of 2-degrees in latitude by 2.5-degrees in longitude. The formal error is between 4 and 8 cm. Contrary to previous estimations, this takes into account the errors with regard both to the density field and to the estimation of the velocity field at a reference level.
Tipo: Text
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00079/18977/17955.pdf

La circulation des eaux en Baie de Seine
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chabertd'Hieres, G.
In a joint work several laboratories have attempted to research coherent results on water mass circulation in Seine Bay. The main focus of their research is the measurement and the calculation of instantaneous currents and the study of their temporal and geographical variations, not only to know these currents, but, also to determinate the short or long-term development of water masses. In this report the author comments and presents the notions which have been drawn from this work.
Tipo: Text
Palavras-chave: Current measurement; Current prediction; Water masses; Water circulation.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1256.pdf

Species are hypotheses: avoid connectivity assessments based on pillars of sand
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pante, Eric; Puillandre, Nicolas; Viricel, Amélia; Arnaud-haond, Sophie; Aurelle, Didier; Castelin, Magalie; Chenuil, Anne; Destombe, Christophe; Forcioli, Didier; Valero, Myriam; Viard, Frederique; Samadi, Sarah.
Connectivity among populations determines the dynamics and evolution of populations, and its assessment is essential in ecology in general and in conservation biology in particular. The robust basis of any ecological study is the accurate delimitation of evolutionary units, such as populations, metapopulations and species. Yet a disconnect still persists between the work of taxonomists describing species as working hypotheses and the use of species delimitation by molecular ecologists interested in describing patterns of gene flow. This problem is particularly acute in the marine environment where the inventory of biodiversity is relatively delayed, while for the past two decades, molecular studies have shown a high prevalence of cryptic species. In this...
Tipo: Text
Palavras-chave: Connectivity; Marine organisms; Molecular systematics; Taxonomy.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00248/35952/35301.pdf

Opal-based isotopic proxies of paleoenvironmental conditions
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: De La Rocha, Christina L.
[ 1] The delta Si-30 and delta N-15(diatom) of diatom opal provide a view of nutrient utilization in past oceans and are used to formulate and test hypotheses concerning Southern Ocean productivity and fluctuations in atmospheric CO2 over glacial cycles. Water column profiles of the Si and N isotopic composition of nutrients and the delta N-15(diatom) of sediment core tops support the use of delta Si-30 and delta N-15(diatom) as tracers of silicic acid and nitrate utilization, but some issues remain concerning the use of these proxies for paleoceanographic reconstructions. If average marine delta Si-30 changes over time, it could contribute to the observed down core variations in delta Si-30. Reconstruction of deepwater delta Si-30 using opal from sponges...
Tipo: Text
Ano: 2006
URL: https://archimer.ifremer.fr/doc/00496/60759/65122.pdf

One-dimensional biophysical modelling of fish egg vertical distributions in shelf seas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Petitgas, Pierre; Magri Hoeltzener, Stephanie; Lazure, Pascal.
Modelling the vertical distribution of fish eggs is important when assessing fish stocks with egg production methods and for monitoring the reproductive potential of fish populations. Fish eggs are passive particles and their vertical distribution is determined by a few parameters such as egg density, egg diameter, wind- and tide-induced turbulence, and vertical hydrographic structure. A one-dimensional vertical biophysical, numerical model was developed which was adapted to the hydrography of shelf seas under the influence of tidal currents, wind-induced circulation, and river discharges. The biological part of the model parameterized the ascent velocity of the egg as a function of egg properties (diameter, density) and water properties (density,...
Tipo: Text
Palavras-chave: Vertical distribution; Sprat; Sardine; Fish egg buoyancy; CUFES; Biophysical coupling; Anchovy.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2277.pdf

Les avis rendus par les laboratoires côtiers d'environnement de l'Ifremer
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Houdart, Michel; Michaudet, Laurent.
Les laboratoires côtiers de la DEL émettent chaque année près de 400 avis, à la demande de l'Administration. Après avoir situé les avis dans le cadre plus général de l'expertise, rappelé les obligations réglementaires de l'établissement et examiné les procédures internes, ce rapport analyse la demande, les sites concernés, la portée des avis en terme d'aménagement du littoral, les activités économiques impliquées, le temps passé et le coût pour l'Ifremer, etc.
Tipo: Text
Palavras-chave: Avis; Expertise; Laboratoires côtiers.
Ano: 1998
URL: https://archimer.ifremer.fr/doc/00501/61252/64836.pdf

Projet CRYOYSTER: Optimisation, standardisation et validation de la congélation de laitance d'huître creuse Crassostrea gigas à des fins de conservation et de diffusion génétique - Appel d'offre de l'OFIMER du 8 Novembre 2001 - Rapport final
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Brizard, Raphael; Bernardi, Maud; Boudry, Pierre; Haffray, Pierrick; Labbe, Catherine; Maisse, Gérard; Maurouard, Elise; Robert, Rene; Roger, Jean-luc.
Afin d'appuyer la filière ostréicole, les programmes de recherche actuels visent à proposer des méthodes d'amélioration génétique des rendements et de la qualité du produit (sélection, polyploïdisation). A l'image des productions animales terrestres, la continuation de ces travaux et la diffusion du progrès génétique dans la filière seraient grandement facilitée par le développement de techniques de conservation des génotypes sélectionnés. La cryopréservation qui est utilisée fréquemment dans les programmes de sélection des animaux terrestres et des espèces piscicoles n'est toujours pas disponible pour les mollusques bivalves. Cette technique présente les atouts qui peuvent pourraient satisfaire les différents acteurs de la filière ostréicole car elle...
Tipo: Text
Palavras-chave: Congélation sperme; Standardisation; Procédure; Ecloserie expérimentale; Fécondation; Cryopréservation; Sperme cryopréservé.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/00049/16056/13516.pdf

The late Messinian event: a worldwide tectonic revolution
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Leroux, Estelle; Aslanian, Daniel; Rabineau, Marina; Pellen, Romain; Moulin, Maryline.
A review of geological and geophysical observations points towards a worldwide kinematic change at around 6 Ma. The synchronicity of many manifestations (tectonics, magmatism, kinematics, ecological events, among others) at ~6 Ma, similar to those recognized from time to time on the geological timescale, argues for a global geodynamic event that has led to many regional consequences on Earth's surface. In particular, we propose that this global event was the main trigger for the three fold increase in sediment deposits in the world ocean over the last ~5 Ma, but also for the onset of the Messinian Salinity Crisis in the Mediterranean area, one of the most severe ecological crises in the Earth's history. We suggest this Messinian revolution to be the last...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00422/53362/54204.pdf

Industries. Sous-région marine Méditerranée occidentale. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Équipe de coordination DCSMM; AAMP.
Tipo: Text
Palavras-chave: Méditerranée; Activité industrielle; Réglementation environnementale; Interaction avec le milieu.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00331/44268/43837.pdf

Impact of aquaculture on the genetic structure of Mediterranean populations of Dicentrarchus
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bahri Sfar, Lilia; Lemaire, Christophe; Chatain, Beatrice; Divanach, Pascal; Ben Hassine, Oum Kalthoum; Bonhomme, Francois.
A phylogeographic analysis based on 6 polymorphic microsatellites was performed on 15 sea bass samples. five from Western Mediterranean, seven from Eastern Mediterranean and three coming from French aquaculture stocks. Among the eastern samples, three did not cluster according to their geographic origin but rather with the occidental group. Furthermore. a somewhat lower allelic diversity was observed within these particular samples, indicating that they originated from a limited number of progenitors of foreign origin. Among the aquaculture stocks, only one revealed a significant reduction of genetic variability, indicating that these stocks are largely outbred and open to wild fishes. The fact that the use of occidental fingerlings to seed broodstocks in...
Tipo: Text
Palavras-chave: Dicentrarchus labrax; Farmed populations; Escapees; Molecular marker.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-410.pdf

Vertically extensive magma reservoir revealed from joint inversion and quantitative interpretation of seismic and gravity data
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Paulatto, Michele; Moorkamp, Max; Hautmann, Stefanie; Hooft, Emilie; Morgan, Joanna V.; Sparks, R. Stephen J.
Recent advances in our understanding of arc magmatic systems indicate that melt is stored for long periods in low‐melt fraction crystal mushes, and that eruptible magma reservoirs are short‐lived and are assembled rapidly by buoyancy‐induced instabilities and draining of the crystal mush. Many aspects of their architecture remain unclear, particularly in relation to their geometry and shallow melt distribution. We investigate the storage of melt below the active Soufrière Hills Volcano (SHV), Montserrat, using joint geophysical inversion combined with a quantitative interpretation approach based on rock physics. We jointly inverted active‐source P‐wave traveltimes and gravity anomalies to derive coincident 3D models of P‐wave velocity and density to a...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00591/70321/68357.pdf

Comparison of adhesion layers of gold on silicate glasses for SERS detection
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Colas, Florent; Barchiesi, D.; Kessentini, S.; Toury, T.; De La Chapelle, M. Lamy.
Gold is one of the most widely used metals for building up plasmonic devices. Although slightly less efficient than silver for producing sharp resonance, its chemical properties make it one of the best choices for designing sensors. Sticking gold on a silicate glass substrate requires an adhesion layer, whose effect has to be taken into account. Traditionally, metals (Cr or Ti) or dielectric materials (TiO2 or Cr2O3 ) are deposited between the glass and the nanoparticle. Recently, indium tin oxide and (3-mercaptopropyl)trimethoxysilane (MPTMS) were used as a new adhesion layer. The aim of this work is to compare these six adhesion layers for surface- enhanced Raman scattering sensors by numerical modeling. The near-field and the far-field optical responses...
Tipo: Text
Palavras-chave: Surface-enhanced raman scattering; Adhesion layer; Nanocylinder; Discrete dipole approximation.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00298/40907/40083.pdf

EurOcean 2010 Conference Report and Ostend Declaration. EurOCEAN 2010 – Grand challenges for marine research in the next decade. Thermae Palace, Oostende, Belgium, 12-13 October 2010
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mcdonough, Niall; Calewaert, Jan-bart.
Tipo: Text
Ano: 2010
URL: https://archimer.ifremer.fr/doc/00686/79767/82567.pdf

Global biogeography of SAR11 marine bacteria
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Brown, Mark V.; Lauro, Federico M.; Demaere, Matthew Z.; Muir, Les; Wilkins, David; Thomas, Torsten; Riddle, Martin J.; Fuhrman, Jed A.; Andrews-pfannkoch, Cynthia; Hoffman, Jeffrey M.; Mcquaid, Jeffrey B.; Allen, Andrew; Rintoul, Stephen R.; Cavicchioli, Ricardo.
The ubiquitous SAR11 bacterial clade is the most abundant type of organism in the world’s oceans, but the reasons for its success are not fully elucidated. We analysed 128 surface marine metagenomes, including 37 new Antarctic metagenomes. The large size of the data set enabled internal transcribed spacer (ITS) regions to be obtained from the Southern polar region, enabling the first global characterization of the distribution of SAR11, from waters spanning temperatures −2 to 30°C. Our data show a stable co-occurrence of phylotypes within both ‘tropical’ (&gt;20°C) and ‘polar’ (&lt;10°C) biomes, highlighting ecological niche differentiation between major SAR11 subgroups. All phylotypes display transitions in abundance that are strongly correlated with...
Tipo: Text
Palavras-chave: Adaptive radiation; Antarctica; Metagenome; Pelagibacter; Phylotype distribution.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00140/25132/23242.pdf

Sea ice variability in the Nordic Seas over Dansgaard–Oeschger climate cycles during the last glacial – A biomarker approach
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sadatzki, Henrik.
The Arctic sea ice cover is in fast transition. Resolving past sea ice fluctuations and its link with abrupt climate change might be key for a better understanding of yet unknown climatic consequences of future Arctic sea ice loss. The last glacial period was marked by recurring abrupt climate changes, referred to as Dansgaard–Oeschger (D–O) climate cycles. These D–O climate cycles and in particular the associated abrupt warming transitions by up to 15°C over Greenland happening within years or decades might have been linked to shifts in sea ice cover in the Nordic Seas. This PhD thesis aims at resolving and constraining the largely unknown millennialscale sea ice variability in the Nordic Seas and its pivotal role for abrupt climate changes during the D–O...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00505/61699/65667.pdf

Impact du barrage d'Arzal sur la qualité des eaux de l'estuaire et de la baie de la Vilaine
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Merceron, Michel.
The Arzal dam upon the Vilaine estuary provokes an aggravation of a recurrent summer hypoxia of the bottom waters in the bay of  Vilaine.
Tipo: Text
Palavras-chave: Suspended sediments; Salinity; Coastal zone; Dam estuary; Oxygen depletion; Matières en suspension; Salinité; Zone côtière; Estuaire; Barrage; Anoxie.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/rapport-2658.pdf

Combining Argo profiles with a general circulation model in the North Atlantic. Part 1: Estimation of hydrographic and circulation anomalies from synthetic profiles, over a year
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Forget, Gael; Ferron, Bruno; Mercier, Herle.
Argo is a global array of profiling floats that provides temperature (T) and salinity (S) profiles from 2000 m to the surface every ten days with a nominal spatial resolution of 3 degrees. Here we present idealized experiments where the adjoint method is used to synthesize simulated sets of Argo profiles with a general circulation model, over a one-year period, in the North Atlantic. Using a number of drifting profilers consistent with Argo deployment objectives, the simulated array permits one to identify large-scale anomalies in the hydrography and circulation, despite the presence of a simulated eddy noise of large amplitude. Model dynamics provide an objective means to distinguish eddy noise from large-scale oceanic variability, and to infer the...
Tipo: Text
Palavras-chave: General circulation model; Argo; Twin experiment; 4DVAR; Data assimilation.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-3721.pdf

Le Réseau REPAMO : un outil de surveillance de la santé des mollusques marins élevés et sauvages
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Francois, Cyrille; Joly, Jean-pierre; Garcia, Celine; Miossec, Laurence; Arzul, Isabelle; Robert, Maeva; Omnes, Emmanuelle; Chollet, Bruno; Renault, Tristan.
The Ifremer Repamo network (REseau de PAthologie des MOllusques) is the national surveillance network in charge of monitoring marine mollusc health on French coastlines. It is commissioned to enforce the official regulations and to provide a public service, under the supervision of the competent authority (DGAL Veterinary Directorate) in the Ministry.of Agriculture and Fisheries. Its goals are to prevent the introduction and the dissemination of infectious agents, in particular pathogens involved in reportable diseases, and to monitor the changes in the pathogens already present on the French coasts.
Tipo: Text
Palavras-chave: Network; Surveillance; Mollusks; Pathogens; Regulations.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6946.pdf

Quelques trématodes de poissons de l'étang de Berre
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mazza, Jacques.
The parasitic worms (helminths) of fish in the Marseilles region have been studied by Timon-David (1937) and Carrère (1938). However, those from fish in the Berre Lagoon have never been studied. The present study thus provides observations on this population of helminths.The fish studied here (Caranx trachurus [syn. Trachurus trachurus] Linnaeus, Morone labrax [syn. Dicentrarchus labrax] Linnaeus and Scomber scombrus Linnaeus) are abundant throughout the year. The methodical observation of their digestive tract revealed four parasites belonging to families Fellodistomatidae (Odhner) Nicoll, Allocreadiidae Stossich and Dinuridae Luhe. After isolation, live examination and fixation, the specimens were stained with borax carmine solution and carefully cleared...
Tipo: Text
Ano: 1963
URL: http://archimer.ifremer.fr/doc/1963/publication-4182.pdf

Multifaceted biodiversity hotspots of marine mammals for conservation priorities
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Albouy, Camille; Delattre, Valentine L.; Merigot, Bastien; Meynard, Christine N.; Leprieur, Fabien.
Aim Identifying the multifaceted biodiversity hotspots for marine mammals and their spatial overlap with human threats at the global scale. Location World-wide. Methods We compiled a functional trait database for 121 species of marine mammals characterized by 14 functional traits grouped into five categories. We estimated marine mammal species richness (SR) as well as functional (FD) and phylogenetic diversity (PD) per grid cell (1° × 1°) using the FRic index (a measure of trait diversity as the volume of functional space occupied by the species present in an assemblage) and the PD index (the amount of evolutionary history represented by a set of species), respectively. Finally, we assessed the spatial congruence of these three facets of biodiversity...
Tipo: Text
Palavras-chave: Conservation; Functional diversity; Marine mammals; Phylogenetic diversity.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00385/49662/51084.pdf

Phase Equilibria of the CH4-CO2 Binary and the CH4-CO2-H2O Ternary Mixtures in the Presence of a CO2-Rich Liquid Phase
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Legoix, Ludovic; Ruffine, Livio; Donval, Jean-pierre; Haeckel, Matthias.
The knowledge of the phase behavior of carbon dioxide (CO2)-rich mixtures is a key factor to understand the chemistry and migration of natural volcanic CO2 seeps in the marine environment, as well as to develop engineering processes for CO2 sequestration coupled to methane (CH4) production from gas hydrate deposits. In both cases, it is important to gain insights into the interactions of the CO2-rich phase—liquid or gas—with the aqueous medium (H2O) in the pore space below the seafloor or in the ocean. Thus, the CH4-CO2 binary and CH4-CO2-H2O ternary mixtures were investigated at relevant pressure and temperature conditions. The solubility of CH4 in liquid CO2 (vapor-liquid equilibrium) was determined in laboratory experiments and then modelled with the...
Tipo: Text
Palavras-chave: Gas hydrate; CH4; CO2-rich mixtures; Phase equilibria; Soave-Redlich-Kwong (SRK) cubic equation of state (EoS).
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00414/52538/53349.pdf

Cycle du mercure en estuaire, baie de Seine et pays de Caux
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Laurier, Fabien.
The Seine estuary and its adjacent region Pays de Caux are two significant sources of mercury for coastal marine environments. It is carried through fluvial means for the Seine bay and through karstic fresh water emergences for Pays de Caux's coastal area.  Mercury cycle in the Seine estuary and bay is affected by additional anthropical activities. The estuary's maximal turbidity area acts like a trap and a chemical reactor for fluvial mercury. Within this area, we can confirm: (i) the non conservative behaviour of dissolved mercury; (ii) mercury enrichment of particles when comparing the Seine's and marine environment and we suggest mercury particle redistribution from the organic fraction to the oxyhydroxydes fraction. A large fraction of mercury is...
Tipo: Text
Palavras-chave: Bay of Seine; Pays de Caux; Estuary; Coastal zone; Speciation; Bioavailability; Mercury; Pays de Caux; Seine; Estuaire; Emergence; Zone côtière; Spéciation; Biodisponibilité; Mercure.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/these-1842.pdf

Biogéochimie de la matière organique en milieu estuarien : stratégies d'échantillonnage et de recherche élaborées en Loire (France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Tipo: Text
Ano: 1984
URL: http://archimer.ifremer.fr/doc/00113/22421/20117.pdf

Bilan de la qualité bactériologique des eaux du littoral calvadosien : baignade, conchyliculture et pêche à pied de 1989 à 1994
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Grouhel, Anne; Datin, Laure; Etourneau, Claude; Jeanneret, Hélène.
A l'issue de la campagne de mesures estivales 1994 de la DDASS et à la veille du classement sanitaire des zones conchylicoles en application de la directive européenne 91 /492, un bilan de la qualité bactériologique de eaux du littoral du Calvados a été réalisé. Il porte sur les cmq dernières années de suivi des plages et des coquillages assuré respectivement par la DDASS du Calvados et l'IFREMER de Port-en-Bessin. Il met en évidence quelques points noirs permanents : l'embouchure de l'Orne, la portion de littoral entre la Dives et la Touques et le littoral de la côte de Nacre. Ailleurs, la qualité sanitaire, plutôt satisfaisante, reste néanmoins fragile. Le système d'assainissement des communes riveraines et de grosses aglomérations en amont du bassin...
Tipo: Text
Palavras-chave: Calvados; Pollution bactérienne; Qualité.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00426/53741/54622.pdf

Report of the Scallop Assessment Working Group (WGScallop), 6-10 Oc-tober 2014, Nantes, France
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ICES.
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00586/69860/67755.pdf

Collective effects of development on the marine environment
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pearce, J B.
This paper identifies issues associated with effects of industrialization and urbanization on the marine environment. Emphasis is given to the collective effects of development and impacts on living marine resources. Issues of concern include inorganic and organic contaminants, nutrient enrichment and eutrophication, physical degradation of habitat, and non-point sources of stresses. Conclusions are based on case studies and include solutions as these are being practiced.
Tipo: Text
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00267/37866/35947.pdf

Elaboration d'un outil de gestion prévisonnelle de la côte Aquitaine - Etat d'avancement de la phase 1 - "Exploitation des cartes anciennes Marines et Terrestres"
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: L'Yavanc, Jacky.
L'élaboration d'un outil d'aide à la gestion de la côte d'Aquitaine nécessite dans un premier temps de retracer l'historique des transformations qui ont façonné la côte entre la Pointe de Grave et la Pointe Saint-Martin (fig.1).
Tipo: Text
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00080/19156/16750.pdf

Bancarisation des données hydrologiques des campagnes halieutiques. Proposition d’harmonisation et de restitution des données au titre de la DCSMM
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mabileau, Guillaume; Baudrier, Jerome.
Cette étude fait état de la collecte des données hydrologiques actuellement effectuée à bord des six campagnes halieutiques DCF au titre de la DCSMM, et propose des solutions pour l’harmonisation de la bancarisation en vue d’une restitution uniformisée auprès des pilotes de la DCSMM et du grand public.
Tipo: Text
Palavras-chave: DCSMM; Campagnes halieutiques; DCF; Collecte de données; Hydrologie; Bancarisation.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00428/53943/55076.pdf

Origin and significance of tourmalinites and tourmaline-bearing rocks of Menderes Massif, western Anatolia, Turkey
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Yucel-ozturk, Yesim; Helvaci, Cahit; Palmer, Martin R.; Ersoy, E. Yalcin; Freslon, Nicolas.
In the western central portion of Anatolia lies the Menderes Massif – a large metamorphic crystalline complex made of Neoproterozoic to Precambrian basement rocks overlain by Palaeozoic to early Tertiary metasedimentary rocks, and with a multistage metamorphic evolution developed from the late Neo-Proterozoic to Eocene. We have undertaken a study of the petrology, geochemistry and boron isotope composition of these tourmaline occurrences aiming to constrain the processes responsible for the enrichment of boron and other fluid mobile elements in the Menderes Massif. The dispersed tourmaline has chemical and boron isotope compositions typical of a continental crust setting, but while some of the tourmalinites display similar signatures, others have heavier...
Tipo: Text
Palavras-chave: Tourmalinites; Geochemistry; Boron isotope; Menderes Massif; Western Anatolia; Turkey.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00250/36121/34675.pdf

Differential vulnerability to climate change yields novel deep-reef communities
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Marzloff, Martin; Oliver, Eric C. J.; Barrett, Neville S.; Holbrook, Neil J.; James, Lainey; Wotherspoon, Simon J.; Johnson, Craig.
The effects of climate-driven ocean change on reef habitat-forming species are diverse(1,2) and can be deleterious to the structure and functioning of seafloor communities(3-5). Although responses of shallow coral- or seaweed-based reef communities to environmental changes are a focus of ecological research in the coastal zone(1,4-6), the ecology of habitat-forming organisms on deeper mesophotic reefs remains poorly known. These reefs are typically highly biodiverses(7,8) and productive as a result of massive nutrient recycling(9). Based on seafloor imagery obtained from an autonomous underwater vehicle(8), we related change in community composition on deep reefs (30-90 m) across a latitudinal gradient (25-45 degrees S) in southeastern Australia to...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00461/57268/64187.pdf

Programme de surveillance DCSMM Benthos 2017 pour la masse d'eau côtière "Pertuis Breton - FRGC53" sous-région marine "GdG" des macroalgues intertidales et de la faune associée au Grouin NE Loix (île de Ré) IR : rapport final
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sauriau, Pg; Breret, M; Dartois, M.
L’objet de ce document est les résultats de la surveillance des macroalgues intertidales et de leur faune associée de 2017 en deux saisons, printemps et automne sur le site du Grouin NE Loix (île de Ré) IR.
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00594/70566/68750.pdf

The mighty Susquehanna-extreme floods in Eastern North America during the past two millennia
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Toomey, Michael; Cantwell, Meagan; Colman, Steven; Cronin, Thomas; Donnelly, Jeffrey; Giosan, Liviu; Heil, Clifford; Korty, Robert; Marot, Marci; Willard, Debra.
The hazards posed by infrequent major floods to communities along the Susquehanna River and the ecological health of Chesapeake Bay remain largely unconstrained due to the short length of streamgage records. Here we develop a history of high‐flow events on the Susquehanna River during the late Holocene from flood deposits contained in MD99‐2209, a sediment core recovered in 26 m of water from Chesapeake Bay near Annapolis, Maryland, USA. We identify coarse‐grained deposits left by Hurricane Agnes (1972) and the Great Flood of 1936, as well as during three intervals that predate instrumental flood records (~1800‐1500, 1300‐1100 and 400‐0 CE). Comparison to sedimentary proxy data (pollen and ostracode Mg/Ca ratios) from the same core site indicate that...
Tipo: Text
Palavras-chave: Hurricane; Flood; Holocene; East coast; River; Chesapeake.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00483/59447/62291.pdf

Zooplankton metabolism in South African estuaries: does habitat type influence ecological strategies?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tagliarolo, Morgana; Porri, F; Garvie, C D; Lechman, K; Scharler, U M.
Zooplankton community composition, biomass and metabolism can vary drastically over space and time in subtropical estuaries. Changing environmental conditions can affect communities differently, depending on the characteristics of the species involved. In the present study, we compared the rates of oxygen consumption of the dominant zooplankton taxa living in permanently open and in temporally open/closed estuaries. The metabolic response was tested at four temperatures experienced by the animals in their natural environment. Zooplankton from the temporally open/closed estuary showed low activation energies and low rate of metabolism at the highest temperature tested. Animals from the permanently open estuary had higher respiration rates at increased...
Tipo: Text
Palavras-chave: Metabolism; Zooplankton; Respiration; Estuary; Thermal sensitivity.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00513/62425/66904.pdf

Delayed mode quality control and Oxygen correction of Ovide Argo data. Float WMO 5902304
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lagadec, Catherine; Thierry, Virginie; Cabanes, Cecile.
This report presents the delayed mode analysis of an Argo float. Real time quality control are checked and interesting profiles are plotted. The OW method (objective analysis) is used to detect a conductivity sensor drift and correct it, if any. In this report, are also explained and plotted Oxygen corrections with LOCODOX software.
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00406/51750/52347.pdf

Gyre-scale circulation cells in the red-sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Quadfasel, D; Baudner, H.
High resolution synoptic hydrographic surveys carried out during 1982 to 1987 are used to delineate the two-dimensional baroclinic flow pattern of the Red Sea. it is shown that the circulation can be characterized through a succession Of four gyres, some 200 km in diameter, the locations of which are linked to the major topographic basins of the Red Sea. The gyres have a transport almost an order of magnitude larger than the large-scale thermohaline driven flow. They appear to be forced by the strongly rotational wind field over the Red Sea.
Tipo: Text
Palavras-chave: RED SEA; CIRCULATION OF MARGINAL SEAS; TOPOGRAPHIC GYRES.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00099/21049/18675.pdf

Hydrothermal deposits and associated basement rocks from the Galapagos spreading center
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hekinian, Roger; Rosendahl, Br; Cronan, Ds; Dmitriev, Y; Fodor, Rv; Goll, Rm; Hoffert, M; Humphris, Se; Mattey, Dp; Natland, J; Petersen, N; Roggenthen, W; Schrader, El; Srivastava, Rk; Warren, N.
Relatively thick (up to 15 m) hydrothermal deposits from the southern flank of the Galapagos spreading center were drilled on a crust of about 0.62 myr old (magnetic age), during Leg 54 of the "Glomar Challenger" in the central Eastern Pacific Ocean. A stratigraphic sequence of ferrobasalt, pelagic oozes, and hydrothermal deposits of green clay-rich material and Fe-Mn concretions were recovered. The green clay-rich material (Fe-Si type of smectite) is also found interlayered between the pelagic ooze and filling veins, veinlets and vesicles in the drilled basement rocks. The low transitional metal content (Cu &lt; 150 ppm). Ni &lt; 100 ppm and Co &lt; 200 ppm) and the nature of the green clay-rich material from the Galapagos deposits make them comparable to...
Tipo: Text
Ano: 1978
URL: http://archimer.ifremer.fr/doc/1978/publication-5254.pdf

Volcanic passive margins: another way to break up continents
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Geoffroy, Laurent; Burov, E. B.; Werner, P.
Two major types of passive margins are recognized, i.e. volcanic and non-volcanic, without proposing distinctive mechanisms for their formation. Volcanic passive margins are associated with the extrusion and intrusion of large volumes of magma, predominantly mafic, and represent distinctive features of Larges Igneous Provinces, in which regional fissural volcanism predates localized synmagmatic break-up of the lithosphere. In contrast with non-volcanic margins, continentward-dipping detachment faults accommodate crustal necking at both conjugate volcanic margins. These faults root on a two-layer deformed ductile crust that appears to be partly of igneous nature. This lower crust is exhumed up to the bottom of the syn-extension extrusives at the outer parts...
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00639/75117/75434.pdf

Rapid expansion of the invasive oyster Crassostrea gigas at its northern distribution limit in Europe: Naturally dispersed or introduced?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Angles D'Auriac, Marc B.; Rinde, Eli; Norling, Pia; Lapegue, Sylvie; Staalstrom, Andre; Hjermann, Dag O.; Thaulow, Jens.
The Pacific oyster, Crassostrea gigas, was introduced to Europe for aquaculture purposes, and has had a rapid and unforeseen northward expansion in northern Europe. The recent dramatic increase in number of C. gigas populations along the species' northern distribution limit has questioned the efficiency of Skagerrak as a dispersal barrier for transport and survival of larvae. We investigated the genetic connectivity and possible spreading patterns between Pacific oyster populations on the southern Norwegian coast (4 localities) and Swedish and Danish populations by means of DNA microsatellite analysis of adult oysters, and by simulating larvae drift. In the simulations we used a 3D oceanographic model to explore the influence of recent climate change...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00385/49589/50101.pdf

Environmental DNA reveals tropical shark diversity in contrasting levels of anthropogenic impact
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bakker, Judith; Wangensteen, Owen S.; Chapman, Demian D.; Boussarie, Germain; Buddo, Dayne; Guttridge, Tristan L.; Hertler, Heidi; Mouillot, David; Vigliola, Laurent; Mariani, Stefano.
Sharks are charismatic predators that play a key role in most marine food webs. Their demonstrated vulnerability to exploitation has recently turned them into flagship species in ocean conservation. Yet, the assessment and monitoring of the distribution and abundance of such mobile species in marine environments remain challenging, often invasive and resource-intensive. Here we pilot a novel, rapid and non-invasive environmental DNA (eDNA) metabarcoding approach specifically targeted to infer shark presence, diversity and eDNA read abundance in tropical habitats. We identified at least 21 shark species, from both Caribbean and Pacific Coral Sea water samples, whose geographical patterns of diversity and read abundance coincide with geographical differences...
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00416/52732/74686.pdf

Répartition spatio-temporelle de la température et de la salinité. Sous-région marine Manche - Mer du Nord. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vandermeirsch, Frederic.
Tipo: Text
Palavras-chave: Manche; Mer du Nord; Température; Salinité; Climatologie; Cycle annuel; Processus hydrologiques.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00327/43820/43394.pdf

Marine chemical contaminants. Support to the harmonization of MSFD D8 methodological standards: Matrices and threshold values/reference levels for relevant substances
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Joint Research Centre (European Commission).
According to the Article 17(2) of the Marine Strategy Framework Directive (MSFD), Member States review and update their marine strategies every six years. This requires updates of the MSFD Articles 8, 9 and 10 by 2018. The current report provides an overview of the substances, matrices and threshold values that Member States intend to use for the assessment of the Descriptor 8 in this MSFD reporting cycle. This compilation helps evaluate existing gaps as well as differences between Member States and so identify aspects that need further harmonization. It also helps understand which issues should be addressed to achieve consistency with the new MSFD Commission Decision (EU 2017/848). The information has been gathered from the contributions of the MSFD...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00621/73351/72527.pdf

Last interglacial ocean changes in the Bahamas: climate teleconnections between low and high latitudes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Zhuravleva, Anastasia; Bauch, Henning A.
Paleorecords and modeling studies suggest that instabilities in the Atlantic Meridional Overturning Circulation (AMOC) strongly affect the low-latitude climate, namely via feedbacks on the Atlantic Intertropical Convergence Zone (ITCZ). Despite the pronounced millennial-scale overturning and climatic variability documented in the subpolar North Atlantic during the last interglacial period (MIS 5e), studies on cross-latitudinal teleconnections remain very limited. This precludes a full understanding of the mechanisms controlling subtropical climate evolution across the last warm cycle. Here, we present new planktic foraminiferal assemblage data combined with delta O-18 values in surface and thermocline-dwelling foraminifera from the Bahamas, a region...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00495/60691/65431.pdf

Qualification des données acquises par la station de mesure MOLIT en baie de Vilaine de février à octobre 2016
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Retho, Michael.
Ce rapport présente les éléments qui ont conduit à la qualification des données acquises en 2016 par la station de mesure haute fréquence MOLIT (Mer Ouverte Littoral). La bouée MOLIT est déployée depuis 2008 en baie de Vilaine, une des zones de la côte atlantique les plus menacées par l’eutrophisation. Cette bouée instrumentée constitue un des systèmes de mesure du réseau de mesure haute fréquence Ifremer HOSEA (High frequency Observation network for the environment in coastal SEAs). Cette station est équipée d’une sonde multiparamètre qui mesure les paramètres température, salinité, oxygène dissous, turbidité et fluorescence. Les mesures sont effectuées à deux niveaux (surface et fond) avec une fréquence d’une mesure horaire. Ce rapport synthétise les...
Tipo: Text
Palavras-chave: MOLIT; Bouée instrumentée; Haute fréquence; Baie de Vilaine; Qualification; Température; Salinité; Oxygène dissous; Turbidité; Fluorescence.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00384/49565/50056.pdf

Numerical and Experimental Study of the Interaction between two Marine Current Turbines
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mycek, Paul; Gaurier, Benoit; Germain, Gregory; Pinon, Gregory; Rivoalen, Elie.
The understanding of interaction effects between marine energy converters represents the next step in the research process that should eventually lead to the deployment of such devices. Although some a priori considerations have been suggested recently, very few real condition studies have been carried out concerning this issue. Trials were run on 1/30 th scale models of three-bladed marine current turbine prototypes in a flume tank. The present work focuses on the case where a turbine is placed at different locations in the wake of a first one. The interaction effects in terms of performance and wake of the second turbine are examined and compared to the results obtained on the case of one single turbine. Besides, a three-dimensional software, based on a...
Tipo: Text
Palavras-chave: Marine current turbine; Array; Interaction effects; Vortex method; Laser Doppler Velocimetry.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00170/28165/26427.pdf

A Conservative Model for Nonlinear Dynamics in a Stratified, Rotating Fluid
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Filatoff, Nicolas; Carton, Xavier.
We present a set of equations describing the nonlinear dynamics of flows constrained by environmental rotation and stratification (Rossby numbers Ro∈[0.1,0.5] and Burger numbers of order unity). The fluid is assumed incompressible, adiabatic, inviscid and in hydrostatic balance. This set of equations is derived from the Navier Stokes equations (with the above properties), using a Rossby number expansion with second order truncation. The resulting model has the following properties: 1) it can represent motions with moderate Rossby numbers and a Burger number of order unity; 2) it filters inertia-gravity waves by assuming that the divergence of horizontal velocity remains small; 3) it is written in terms of a single function of space and time (pressure,...
Tipo: Text
Palavras-chave: Incompressible and Stratified Fluids; Intermediate Model; Rossby Number; Burger Number; Conservation Properties; Energy; Potential Vorticity.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00600/71195/69561.pdf

Contrasting tropical estuarine ecosystem functioning and stability: A comparative study
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Villanueva, Ching-maria.
A comparative study of the Sine-saloum (Senegal) and Gambia (The Gambia) estuaries was performed based on trophic model outputs that describe the system structure and functioning. These trophic models were constructed such as to differentiate main energetic flows in the systems and express how climate change may have impacted ecosystem resilience to change. Estuarine fish assemblages are highly resilient despite exposure to vast hydrodynamic variations and stress. Coupled with strong anthropogenic-driven stresses such as fisheries and climate change, ecosystems may undergo severe regime shifts that may weaken their resilience and stability. Taxonomically related and morphologically similar species do not necessarily play similar ecological roles in these...
Tipo: Text
Palavras-chave: Complex adaptative systems; Climate change; Food web models; Regime shifts; Ecosystem resilience; Trophic ecology.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00249/36034/34571.pdf

Obtention de souches conchylicoles performantes par polyploïdisation (2ème partie)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gerard, Andre.
Following a phase of experimental system development, acquisition and improvement of triploidisation techniques carried out in 1989, the 1990 program divides into four main actions:1) significant production of diploid and triploid populations of cupped oysters and Pacific clams in order to compare their performances in French coastal waters2) first trials of triploidy induction in European clam3) development of a ploidy control technique at any stage of the animal life, through digital imaging4) summary of the first trials of tetraploidy induction in C. gigas and R. philippinarum
Tipo: Text
Palavras-chave: Imagerie numérique; Ruditapes decussatus; Ruditapes philippinarum; Crassostrea gigas; Cytogénétique; Tétraploïdie; Triploïdie; Polyploïdie.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/rapport-3855.PDF

Assessment of polycyclic aromatic hydrocarbon concentrations in mussels (Mytilus galloprovincialis) from the Western basin of the Mediterranean Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Galgani, Francois; Martinez-gomez, Conception; Giovanardi, Franco; Romanelli, Giulia; Caixach, Josep; Cento, Alessandro; Scarpato, Alfonso; Benbrahim, Samir; Messaoudi, Sabri; Deudero, Salud; Boulahdid, Mostafa; Benedicto, Jose; Andral, Bruno.
The Mytilos project was carried during the last 3 years (2004-2006) in order to evaluate the level of chemical contamination along the coasts of the western basin of the Mediterranean Sea. Active mussel watch consisted of caged (12 weeks) Mytilus galloprovincialis at 123 stations along the Mediterranean coasts of Spain, France, Italy, North Tunisia, Algeria and Morocco. Results indicated total PAHs levels in the range 22-106 mu g/kg dry weight. All large towns or industrial areas from all countries of the basin were affected. Analysis of the origin of contamination demonstrated mainly a pyrolytic origin except in some areas such as Maddalena, Napoli, Alger, and Cornigliano (Genova). Statistical analysis of the PAHs accumulation data enabled the...
Tipo: Text
Palavras-chave: PAHs; Mediterranean Sea; Mytilus galloprovincialis; Caging; Monitoring.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00021/13189/10274.pdf

UE - France. Rapport national destiné au Comité scientifique de la Commission des thons de l’océan Indien 2013-2014
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chavance, Pierre; Chassot, Emmanuel; Bourjea, Jerome; Evano, Hugues; Huet, Jerome; Bach, Pascal; Sabarros, Philippe.
Pour ce qui concerne la France (excluant Mayotte), trois flottilles ont des activités de pêche thonière dans l'océan Indien : - les senneurs opérant pour l’essentiel à partir des Seychelles et de l’Ile Maurice, - les palangriers basés à La Réunion, et à un moindre degré la petite pêche réunionnaise. - La flottille thonière française à la senne exerçant dans l’océan Indien atteint 8 navires en 2013 et ses capture se sont élevées à 39 958 tonnes, soit un niveau légèrement supérieur à celui de 2012 (37 155 t) avec une légère augmentation de l’effort de pêche (2 291 jours de pêche en 2013 et 1 944 jours en 2012). Le programme observateur mis en place depuis 2005, qui a permis de fournir les premières évaluations des rejets et des prises accessoires en 2008, a...
Tipo: Text
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00239/35015/33552.pdf

Biological availability of sediment-bound trace metals.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Luoma, S.
It has been established that direct uptake of (at least some) trace metals from sediments contributes to metal concentrations in benthic organisms. Important controls on metal uptake from sediment are the concentration of the exposure, the partitioning of the metals among components of the sediment, and the redox potential of the sediment. Important problems in ecology, physiology, geochemistry and biogeochemistry remain unresolved, however, and a concentrated interdisciplinary research effort will be necessary before a complete understanding of the fate and impact of sediment-bound metals will be possible.
Tipo: Text
Palavras-chave: Bioaccumulation; Benthos; Food webs; Biogeochemical cycle; Sediments; Availability; Trace metals.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1302.pdf

Analyse des critères de classement du thon rouge et de la raie bouclée dans la liste des espèces menacées ou en déclin de la convention OSPAR
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lorance, Pascal; Rouyer, Tristan.
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00426/53753/79116.pdf

Deep-Sea Origin and In-Situ Diversification of Chrysogorgiid Octocorals
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pante, Eric; France, Scott C.; Couloux, Arnaud; Cruaud, Corinne; Mcfadden, Catherine S.; Samadi, Sarah; Watling, Les.
The diversity, ubiquity and prevalence in deep waters of the octocoral family Chrysogorgiidae Verrill, 1883 make it noteworthy as a model system to study radiation and diversification in the deep sea. Here we provide the first comprehensive phylogenetic analysis of the Chrysogorgiidae, and compare phylogeny and depth distribution. Phylogenetic relationships among 10 of 14 currently-described Chrysogorgiidae genera were inferred based on mitochondrial (mtMutS, cox1) and nuclear (18S) markers. Bathymetric distribution was estimated from multiple sources, including museum records, a literature review, and our own sampling records (985 stations, 2345 specimens). Genetic analyses suggest that the Chrysogorgiidae as currently described is a polyphyletic family....
Tipo: Text
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00467/57831/60158.pdf

Modeling trace metal accumulation in the mediterranean mussel, mytilus galloprovincialis
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Casas, Stellio; Cossa, Daniel; Gonzalez, Jean-louis; Bacher, Cedric; Andral, Bruno.
Monitoring coastal contamination by trace metals pollution using mollusks bivalves as quantitative bioindicators is widely performed in many international biomonitoring programs. In this purpose, modeling metal dynamic in marine mussels is a reliable tool. It allows understanding the bioaccumulation process which results from the interactions between biological, chemical and environmental factors. To calibrate such a model, kinetic experiments on uptake and elimination were conducted on three Mediterranean sites chosen on the basis of their different nutritive and chemical characteristics.
Tipo: Text
Palavras-chave: Growth; Heavy metals; Bioaccumulation; Mytilus galloprovincialis; Bioindicator.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/acte-370.pdf

In situ fast marking study of manila clams (Ruditapes philippinarum)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mahe, Kelig; Bellamy, Elise; D'Amico, Franck; Caill-milly, Nathalie.
Arcachon Bay, in the southern Bay of Biscay, is the first French production area of Manila clam (Ruditapes philippinarum) with an annual commercial fisheries production around 400 tons in recent years. This bivalve mollusc was introduced into the bay in the 1980s for aquaculture purpose and quickly succeeded in natural settlement so that its high market value led to the progressive establishment of a perennial fishery from the mid-1990s. Local management plans applied to this species are based on a licensing system for the commercial, protected fishery areas and days of prohibited fishing for both commercial and recreational fishermen. A minimum catch size is also prescribed by European regulation, and so growth rates are an important matter in this...
Tipo: Text
Palavras-chave: Calcein; In-situ marking; Ruditapes philippinarum; Bivalve mollusks; Fisheries.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00665/77693/79770.pdf

CDOM-DOC relationship in contrasted coastal waters: implication for DOC retrieval from ocean color remote sensing observation.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vantrepotte, Vincent; Danhiez, Francois-pierre; Loisel, Hubert; Ouillon, Sylvain; Meriaux, Xavier; Cauvin, Arnaud; Dessailly, David.
Increasing our knowledge on dissolved organic carbon (DOC) spatio-temporal distribution in the coastal ocean represents a crucial challenge for better understanding the role of these ecosystems in the global oceanic carbon cycle. The assessment of DOC concentration from the absorption properties of the colored part of the dissolved organic matter (a(cdom)) was investigated from an extensive data set covering a variety of coastal environments. Our results confirmed that variation in the acdom(412) to DOC ratio (a*(cdom)(412)) can be depicted from the CDOM spectral slope in the UV domain (S275-295). They also evidenced that regional first order variation in both a*(cdom)(412) and S275-295 are highly correlated to variation in acdom(412). From these...
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00589/70063/68011.pdf

Principes généraux de qualification des données du SIMM
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rabevolo, Clemence.
Un des objectifs du SIMM (Système d'Informations sur le Milieu Marin) cité dans le Schéma National des Données sur le Milieu Marin (SDNMM) est de permettre un accès au public à une information fiable. Afin de répondre à cette exigence, le SIMM doit mettre en place des processus qualité sur les données diffusées. Ce document de réflexion est une note technique sur les principes généraux de qualification des données du SIMM (quels processus, quels outils, etc.) qui évoluera au fur et à mesure des avancées du SAR sur cette thématique.
Tipo: Text
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00685/79747/82523.pdf

A detailed study of the Lucky-Strike hydrothermal site and discovery of a new hydrothermal site: « Menez-Gwen ». Preliminary results of DIVA 1 cruise (5-29 May, 1994)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fouquet, Yves; Charlou, Jean-luc; Donval, Jean-pierre; Radford-knoery, Joel; Pelle, P; Ondreas, Helene; Lourenco, N; Segonzac, Michel; Tivey, Mk.
Tipo: Text
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00070/18134/15682.pdf

Formation de chambres dans la coquille de l'huitre plate Ostrea edulis L. cultivee dans les rias de Galice.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rodriguez, Carmen; Lopez, Francisco.
The formation of anomalies in the calcification of the shell in the flat oyster Ostrea edulis , is not a recent phenomenon. The authors used spat of oyster from France and Greece cultured in the Arosa Estuary, Galicia, Spain, through the punt or floating park system very spread in the Galician estuary. The calculation of different indices  of condition show us that the formation of blisters increases the grade of the shell concavity and it does not affect the meat content of the oyster. The studies of crystallization in the calcareous layers that form the blisters, prove the "calcite", as the only type of crystal and the existence of disorder and disorientiation in the growing of the crystals.
Tipo: Text
Palavras-chave: ANE; Spain Ostrea edulis Bivalvia Environmental effects Anomalies Calcification Oyster culture.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/publication-1836.pdf

Protein sequences bound to mineral surfaces persist into deep time
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Demarchi, Beatrice; Hall, Shaun; Roncal-herrero, Teresa; Freeman, Colin L.; Woolley, Jos; Crisp, Molly K.; Wilson, Julie; Fotakis, Anna; Fischer, Roman; Kessler, Benedikt M.; Jersie-christensens, Rosa Rakownikow; Olsen, Jesper V.; Haile, James; Thomas, Jessica; Marean, Curtis W.; Parkington, John; Presslee, Samantha; Lee-thorp, Julia; Ditchfield, Peter; Hamilton, Jacqueline F.; Ward, Martyn W.; Wang, Chunting Michelle; Shaw, Marvin D.; Harrison, Terry; Dominguez-rodrigo, Manuel; Macphee, Ross De; Kwekason, Amandus; Ecker, Michaels; Horwitz, Liora Kolska; Chazan, Michael; Kröger, Roland; Thomas-oates, Jane; Harding, John H.; Cappellini, Enrico; Penkman, Kirsty; Collins, Matthew J.
Proteins persist longer in the fossil record than DNA, but the longevity, survival mechanisms and substrates remain contested. Here, we demonstrate the role of mineral binding in preserving the protein sequence in ostrich (Struthionidae) eggshell, including from thepalaeontological sites of Laetoli (3.8 Ma) and Olduvai Gorge (1.3 Ma) in Tanzania. By tracking protein diagenesis back in time we find consistent patterns of preservation, demonstrating authenticity of the surviving sequences. Molecular dynamics simulations of struthiocalcin-1 and -2, the dominant proteins within the eggshell, reveal that distinct domains bind to the mineral surface. It is the domain with the strongest calculated binding energy to the calcite surface that is selectively...
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00421/53219/54825.pdf

New evidence of perfect overlapping of Haploops and pockmarks field: Is it a coincidence?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Champilou, Jean-baptiste; Baltzer, Agnes; Murat, Anne; Reynaud, Marine; Maillet, Grégoire M.; Nardelli, Maria Pia; Metzger, Édouard.
In the shallow waters of the Bay of Concarneau (South Brittany, France), previous studies reported a dense settlement of the species Haploops (tube-dwelling bioengineer amphipod) that perfectly overlaps a field of pockmarks. A possible mechanistic link may therefore exist between the Haploops colonies and the shallow pockmarks. To test this hypothesis, interferometry sonar and sub-bottom profiler chirp data were acquired in two new areas located in the marine estuary of the Loire River, “La Lambarde” and “Le Croisic”. The new sites share the same sedimentary and geological characteristics as those found in the Bay of Concarneau. The three sites are similarly located in shallow and muddy environments above a faulted Middle Eocene formation that is incised...
Tipo: Text
Palavras-chave: Shallow waters; South Brittany (France); Geophysics; Pockmarks; Haploops.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00502/61324/64896.pdf

Morphology and molecular phylogeny of prorocentrum consutum sp. nov. (dinophyceae), a new benthic dinoflagellate from south Brittany (northwestern France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chomerat, Nicolas; Sellos, Daniel Y.; Zentz, Frederic; Nezan, Elisabeth.
A new marine benthic Prorocentrum species from sandy habitats of South Brittany (northwestern France), P. consutum sp. nov., is described using LM and SEM and molecular phylogenetic analyses. Cells have a subcircular to broadly ovoid shape and are plainly flattened. They are 57-61 lm long and 52-55 lm wide. A central pyrenoid is present, and the kidney-shaped nucleus is positioned in the posterior region. In right valve view, the periflagellar area is deeply excavated, and the left valve forms a prominent apical ridge. The periflagellar area consists of nine platelets, and a small narrow collar is present around the flagellar pore. The ornamentation of this new species is very peculiar and is characterized by a ring of round areolae located at the...
Tipo: Text
Palavras-chave: Taxonomy; SSU rDNA; SEM; Prorocentrum; Nuclear DNA; Molecular phylogeny; LSU rDNA; Dinoflagellates.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/2010/publication-7449.pdf

Directive Cadre sur l'Eau. Bassin Loire-Bretagne. Contrôle de surveillance dans les masses d’eau côtière et de transition. Actions menées par Ifremer en 2018.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bizzozero, Lucie.
Le contrôle de surveillance 2018 pour la DCE, appliqué dans les eaux littorales de Loire Bretagne a porté sur 25 masses d’eau côtière (sur 39 au total) et 16 masses d’eau de transition (sur 30 au total) retenues au titre du contrôle de surveillance. L’ensemble des résultats acquis, aussi bien sur les paramètres biologiques que chimiques, a permis de mettre à jour l’évaluation de la qualité de ces masses d’eau. L’évaluation de la qualité des masses d’eau présentée dans ce document est basée sur les critères DCE 2000/60/CE. Elle est réalisée à partir des derniers résultats validés (2013-2018). Elle ne se substitue pas à l'état des lieux officiel des masses d'eau, réalisé en 2019, qui figure dans le programme de mesures en ligne sur le site de l'Agence de...
Tipo: Text
Palavras-chave: DCE; Bassin Loire-Bretagne; Contrôle de surveillance; Eau côtière et eau de transition; WFD; Loire Bretagne district; Monitoring; Coastal water and transitional water.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00656/76774/77933.pdf

Réseau de suivi de la croissance de l'huître creuse sur les côtes françaises. REMORA. Résultats des stations nationales. Année 1997
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fleury, Pierre-gildas; Ruelle, Francois; Claude, Serge; Palvadeau, Hubert; Robert, Stephane; D'Amico, Florence; Vercelli, Catherine; Chabirand, Jean-michel.
1. Introduction: network organisation in 1997. The REMORA network - REseau MOIIusques du département Ressources Aquacoles de l'Ifremer - (Ifremer's Aquaculture Resources Department Mollusc Network) has been evaluating, since 1993, hollow oysters' growth (Crassostrea gigas) in major French oyster beds. In order to do so, it has followed up on a yearly basis the growth of a unique oyster batch shared among different stations in the main French raising areas. Releasing takes place in February and picking happens in November or December; intermediary sampling is done in June and September. All operations happen on the same dates for all stations. A national report is published each year. 'Regional' stations are sometimes added to the national network, but they...
Tipo: Text
Palavras-chave: France; Growth; Network of monitoring; Crassostrea gigas; Oyster culture.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/1998/rapport-1765.pdf

Etat de la situation sanitaire des zones de production conchylicole dans les Pertuis Charentais. Volet 2 : Phytoplancton
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ryckaert, Mireille; Margat, Sylvie; Derrien, Annick; Schmitt, Anne; Thomas, Gerard.
Après un rappel de la réglementation concernant la qualité sanitaire des coquillages d’élevage, ainsi qu’une présentation du (REPHY*), un bilan sur les risques sanitaires liés au phytoplancton toxique est réalisé en 2008. Trois familles de toxines sont passées en revue, ainsi que les espèces phytoplanctoniques potentiellement émettrices de ces toxines. Il s’agit des toxines diarrhéiques (DSP) associées aux dinoflagellés du genre Dinophysis, paralysantes (PSP) émises par le dinoflagellé Alexandrium et amnésiantes (ASP) sécrétées par des diatomées du genre Pseudo-nitzschia. Le bilan fait la synthèse des données issues du REPHY depuis 1984 avec une analyse plus précise de 1998 à 2008. La hiérarchisation des risques montre une prépondérance des évènements liés...
Tipo: Text
Palavras-chave: Zones conchylicoles; Pertuis Charentais; Phytoplancton; Phycotoxine.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00123/23419/21246.pdf

Barrages, Parcs, Bordigue. Occitanie. 2017. Observation des Marées au débarquement - OBSDEB
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public. Ces indicateurs intègrent...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00596/70812/69046.pdf

Qualification des données acquises par la station de mesure MOLIT en baie de Vilaine entre mars et octobre 2013
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Retho, Michael.
La station de mesure Molit entre dans la gamme des produits MAREL. Cette gamme est constituée d’outils développés pour l’observation en continu de paramètres hydrologiques. La bouée Molit a été déployée en baie de Vilaine du 22 février 2013 au 25 octobre 2013. Cette station est équipée d’une sonde multiparamètre MP6 qui mesure les paramètres : température, salinité, oxygène dissous, turbidité et fluorescence. Les mesures sont réalisées à 2 niveaux (surface et fond) avec une fréquence d’une mesure horaire. Les données acquises par la bouée MOLIT sont transmises par liaison GSM numérique à la station de gestion Marel Vilaine où elles sont validées. Les données peuvent être consultées sur le site web : http://www.ifremer.fr/co-en/. Un outil de contrôle...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00255/36647/35228.pdf

Observations sur la répartition et l’abondance du merlan Merlangius merlangus (Gadidae) en Manche orientale à partir des données des campagnes CGFS
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Carpentier, Andre.
Since 1988, the IFREMER Fisheries Resources Laboratory in Boulogne-sur-Mer is carrying out a pluriannual project in the Eastern Channel to estimate, directly and by age groups, the abundance and the recruitment of species of commercial interest. These data are obtained during an annual trawl survey (taking place in October) which gives indications about the fish populations distribution and allows to get biological informations needed for stock assessments. The present study aimed to analyse the distribution and the abundance of whiting (Merlangius merlangus). In the Channel, this species is one of the most exploited by the French small-scale fishery. The results showed that the whiting distribution was mainly restricted to shallow waters in October and...
Tipo: Text
Palavras-chave: Gadidae; Merlangius merlangus; Whiting; ANE; English channel; Abundance; Distribution.
Ano: 1998
URL: https://archimer.ifremer.fr/doc/00446/55786/62758.pdf

Biologie et écotoxicologie des véligères de Crassostrea Gigas (Thunberg) dans le bassin d'Arcachon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: His, Edouard.
This study analyses the larval recruitment and biology in Crassostrea Gigas, in the Arcachon Bay. Three types of observations were conducted: - a study of the reproduction anomalies in C. gigas between 1976 and 1981. - observations of the particulate nutrition of the veligeres. - ecotoxicologic experiments (organostannic action on oyster reproduction, mostly). The reproduction anomalies in C. gigas could not be attributed to either the genitors' quality or the water quality in the Arcachon Bay, but to a perturbation of the veligeres' trophic regime; the hypothesis of an alteration of the nanoplancton in the Bay, during the summer period, and linked to the action of the organotins is highly considered. The assumption of responsibility of the particulate...
Tipo: Text
Palavras-chave: Organostanniques; Ecotoxicologie; Nutrition; Anomalies de la reproduction; Bassin d'Arcachon; Crassostrea gigas; Véligères; Recrutement.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/these-3347.pdf

Informing Marine Spatial Planning (MSP) with numerical modelling: A case-study on shellfish aquaculture in Malpeque Bay (Eastern Canada)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Filgueira, Ramon; Guyondet, Thomas; Bacher, Cedric; Comeau, Luc A.
A moratorium on further bivalve leasing was established in 1999–2000 in Prince Edward Island (Canada). Recently, a marine spatial planning process was initiated explore potential mussel culture expansion in Malpeque Bay. This study focuses on the effects of a projected expansion scenario on productivity of existing leases and available suspended food resources. The aim is to provide a robust scientific assessment using available datasets and three modelling approaches ranging in complexity: (1) a connectivity analysis among culture areas; (2) a scenario analysis of organic seston dynamics based on a simplified biogeochemical model; and (3) a scenario analysis of phytoplankton dynamics based on an ecosystem model. These complementary approaches suggest (1)...
Tipo: Text
Palavras-chave: Physical-biogeochemical model; Marine spatial planning; Aquaculture; Carrying capacity; Ecosystem-based management.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00279/39050/37622.pdf

Report of the Working Group on Multispecies Assessment Methods (WGSAM). 10-14 October 2016 Reykjavik, Iceland
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ICES.
The Working Group on Multispecies Assessment Methods (WGSAM) met in Reykjavik, Iceland, 10–14 October 2016. In this tenth report of the pan-regional WGSAM, work fo-cused on four (B, E, F, G) of the multi-annual ToRs. Based on their knowledge, participants provided an updated inventory of progress of multispecies models in ICES Ecoregions (ToR A), noting those regions where no infor-mation was available. Reporting on ToR A was scarce compared to previous years, partly because recent relevant work was reported against ToR E and G instead. A Key Run (ToR B) of the Baltic Sea Ecopath with Ecosim (NS-EwE) model was present-ed and reviewed in detail by 4 WGSAM experts, and approved by the group following implementation of changes agreed in plenary at the meeting...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00369/48052/48139.pdf

French marine economic data 2009
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kalaydjian, Regis; Daures, Fabienne; Girard, Sophie; Van Iseghem, Sylvie; Levrel, Harold; Mongruel, Remi.
The report presents a survey of marine related activities in France and an assessment of their economic weight in terms of value added and employment estimates. A brief outline of the recent past and present economic situation of these activities, and of their position on international markets is given. The survey presents the commercial sector, including marine resource exploitation, manufacturing activities and services, followed by the public sector, including the Navy, state intervention at sea, coastal environment protection and marine sciences. A summary gives an overall estimation of marine value added and employment.
Tipo: Text
Palavras-chave: Economy; Marine; Value added; Employment; Industry; Services.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00050/16145/13628.pdf

A World for Reactive Phenotypes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Geoffroy, Benjamain; Alfonso, Sebastien; Sadoul, Bastien; Blumstein, Daniel T.
Humans currently occupy all continents and by doing so, modify the environment and create novel threats to many species; a phenomenon known as human-induced rapid environmental changes (HIREC). These growing anthropogenic disturbances represent major and relatively new environmental challenges for many animals, and invariably alter selection on traits adapted to previous environments. Those species that survive often have moved from their original habitat or modified their phenotype through plasticity or genetic evolution. Based on the most recent advances in this research area, we predict that wild individuals with highly plastic capacities, relatively high basal stress level, and that are generally shy—in other words, individuals displaying a reactive...
Tipo: Text
Palavras-chave: Coping style; Antipredator behavior; Evolution; Stress physiology; Ecology; Predation; Urbanization; Pollution.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00664/77564/79528.pdf

Impacts cumulatifs et synergiques : l’exemple des mammifères marins. Sous-région marine Golfe de Gascogne. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Martinez, Ludivine; Dabin, Willy; Caurant, Florence; Kiszka, Jeremy; Peltier, Hélène; Spitz, Jérôme; Vincent, Cécile; Van Canneyt, Olivier; Doremus, Ghislain; Ridoux, Vincent.
Tipo: Text
Palavras-chave: Golfe de Gascogne; Mammifères marins; Activités anthropiques; Pressions; Menaces.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00330/44070/43641.pdf

The skipjack fishery in Eastern Indonesia: distinguishing the effects of increasing effort and deploying rumpon FADs on the stock
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Monintja, Dr; Mathews, Cp.
Rumpons, (fads) were widely deployed in Indonesia in the eighties. In the Halmahera area, rumpon increased cpue by 41% , landings of fish per ton of live bait increased by 24%, the consumption of diesel oil for tuna catches reduced by 46%, and profits increased from Rp 10 to 60 million by boat per year1. Tuna aggregation around rumpon increased catchability by more than 40% compared to free swimming tuna. The Halmahera skipjack fishery was assessed by combining catch and effort data from rumpon and pre-rumpon areas of the fishery, and showed that controlled effort could increase landings of approximately 15,000 t per year. Tagging data show that the Halmahera skipjack fishery is probably supported by a local unit stock. Philippine rumpons (payaos) were...
Tipo: Text
Palavras-chave: Attracting techniques Catch/effort Economics Fishery management Overfishing Stock assessment Tuna fisheries Article Geographic Terms: ISEW; Indonesia.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00042/15320/12658.pdf

Fluorescent Receptor Binding Assay for Detecting Ciguatoxins in Fish
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hardison, D. Ransom; Holland, William C.; Mccall, Jennifer R.; Bourdelais, Andrea J.; Baden, Daniel G.; Darius, H. Taiana; Chinain, Mireille; Tester, Patricia A.; Shea, Damian; Quintana, Harold A. Flores; Morris, James A., Jr.; Litaker, R. Wayne.
Ciguatera fish poisoning is an illness suffered by &gt; 50,000 people yearly after consumption of fish containing ciguatoxins (CTXs). One of the current methodologies to detect ciguatoxins in fish is a radiolabeled receptor binding assay (RBA((R))). However, the license requirements and regulations pertaining to radioisotope utilization can limit the applicability of the RBA((R)) in certain labs. A fluorescence based receptor binding assay (RBA((F))) was developed to provide an alternative method of screening fish samples for CTXs in facilities not certified to use radioisotopes. The new assay is based on competition binding between CTXs and fluorescently labeled brevetoxin-2 (BODIPY (R)-PbTx-2) for voltage-gated sodium channel receptors at site 5 instead...
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00664/77575/79555.pdf

Gestion des usages dans la rade de Villefranche-sur-Mer (Alpes-Maritimes, Provence-Alpes-Côte d’Azur, France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Nys, Cecile.
The bay of Villefranche-sur-Mer (Alpes-Maritimes, Provence-Alpes-Côte d’Azur, France) is an important maritime heritage site of the region. It is well known by lots of tourists, but there are in reality little known facts about it. With hits 4 km² and being a natural harbour for all types of vessels, it has lots of economical and social assets. This work aims to gain knowledge of the bay in order to be able to manage its uses. For this purpose, the study has been divided in two parts. The first one has allowed to identify of different protection measures that are applicable to the bay of Villefranche and that are recognized by the French Law. This will be done thanks to a bibliographical synthesis. The second part has to allow the gathering of information...
Tipo: Text
Palavras-chave: Rade de Villefranche-sur-Mer; Systèmes de protection légaux; Entretiens directifs; Acteurs; Mesures de gestion; Bay of Villefranche-sur-Mer; Legal systems of protection; Structured interviews; Actors; Measures of management.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00500/61200/64746.pdf

Microbial balance, and triggering of recent mussel mortality events in France: Is there a link?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guesdon, Stephane; Travers, Marie-agnes; Hervio Heath, Dominique; Derrien, Annick; Genauzeau, Sylvie; Schmitt, Anne; Quintric, Laure; Leroi, Laura; Pepin, Jean-francois.
Since the spring of 2014, the mussel farming of Charente-Maritime and Vendée (French Atlantic coast) has experienced an unprecedented crisis. Mass mortality events of blue mussel (M. edulis) have affected livestock areas, decimating up to 100% of production in some farming areas. Investigation for infectious agents in moribund mussels revealed presence of bacteria capable of inducing mortalities. In this context, the MORBLEU research project (DPMA-Ifremer agreement) was initiated to explore potentially aggravating factors, associated or correlated with mortality of mussels. The aim of the present study is to support the hypothesis that these mortality episodes can be linked to an evolution of microbial communities. Based on historical data from Ifremer...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00415/52696/53566.pdf

Variations ontogéniques et spatio temporelles des écophases larvaires des poissons: évaluation de la condition nutritionnelle et détermination des périodes critiques
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Di Pane, Julien.
As a deterministic factor in recruitment, the study of the survival success of fish larvae has since the work of Hjort (1914) become crucial to understanding variations in population dynamics. Nutrition and the consequences of larval starvation are now widely accepted as major sources of variability in survival, explaining that the number of offspring recruiting the adult population is not proportional to the spawning biomass. It is in this context that this thesis was written with the aim of identifying in situ the critical periods (i.e. high mortality stages) of the larval development, and defining the environmental conditions that are favourable to them using biochemical and histological condition indices. By carrying out several winter and spring...
Tipo: Text
Palavras-chave: Ichtyoplancton; Manche est; Condition; Assemblages; Variations temporelles.; Chtyoplankton; Eastern English Channel; Condition; Assemblages; Temporal variations.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00662/77450/79106.pdf

Ecological Quality Status of the Marennes-Oléron Bay (SW France): inference from soft-bottom macrozoobenthos monitored in coastal and transitional waters under the E.U. Water Framework Directive
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sauriau, Pierre-guy; Cajeri, Pauline; Cottet, Maud; Blanchet, Hugues; Bachelet, Guy; Lavesque, Nicolas; De Montaudouin, Xavier; Dubois, Sophie; Pothier, Anaelle; Auby, Isabelle; Trut, Gilles; Lamouroux, Mélina.
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00212/32308/30729.pdf

Ecophysiological differences between vesicomyid species and metabolic capabilities of their symbionts influence distribution patterns of the deep‐sea clams
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cruaud, Perrine; Decker, Carole; Olu, Karine; Arnaud-haond, Sophie; Papot, Claire; Le Baut, Jocelyn; Vigneron, Adrien; Khripounoff, Alexis; Gayet, Nicolas; Cathalot, Cecile; Caprais, Jean-claude; Pignet, Patricia; Godfroy, Anne; Cambon Bonavita, Marie-anne.
This study provides an analysis of vesicomyid bivalve–symbiont community distribution across cold seep and hydrothermal vent areas in the Guaymas Basin (Gulf of California, Mexico). Using a combination of morphological and molecular approaches including fluorescent in situ hybridization (FISH), and electronic microscopy observations, vesicomyid clam species and their associated symbionts were characterized and results were analyzed in light of geochemical conditions and other on‐site observations. A greater diversity of vesicomyids was found at cold seep areas, where three different species were present (Phreagena soyoae [syn. kilmeri], Archivesica gigas, and Calyptogena pacifica). In contrast, A. gigas was the only species sampled across the hydrothermal...
Tipo: Text
Palavras-chave: Deep-sea ecosystems; Guaymas Basin; Marine ecology; Pliocardinae bivalve; Sulfur storage; Vesicomyid movements.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00493/60426/64028.pdf

Etude de l'immunité antivirale chez l'huître creuse Crassostrea gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Brunetiere, Claire.
Bien que l'impact des pathologies virales en aquaculture soit important, la prévention et les traitements antiviraux sont peu maîtrisés. De plus, les connaissances sur l'immunité des invertébrés marins face aux infections virales sont peu nombreuses. L'immunité non spécifique, constituant la première barrière de défense chez les vertébrés, représente le seul mécanisme de l'immunité décrit à ce jour chez les bivalves marins. De plus, les travaux ayant pour objet l'étude des mécanismes développés par les bivalves pour se défendre vis-à-vis de ces agents infectieux sont peu développés. Il apparaît donc important de comprendre quel(s) mécanismes(s) de défense peut(vent) être mis en place chez les huîtres adultes, C. gigas, pour limiter et /ou contrôler les...
Tipo: Text
Palavras-chave: Huître creuse; Crassostrea gigas; Immunologie; Biologie cellulaire; Hémocytes.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/00034/14475/11773.pdf

Modélisation de la contamination des bivalves par les toxines d'Alexandrium spp. Rapport final
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lassus, Patrick; Amzil, Zouher; Bardouil, Michele; Baron, Regis; Bohec, Madeleine; Bougrier, Serge; Garen, Pierre; Laabir, Mohamed; Leguay, Didier; Masselin, Pierre; Truquet, Philippe; Sechet, Veronique; Bablon, Clotilde; Berard, Jean-baptiste; Carre, Camille; Cheignon, Valerie; Lecamp, Sylvain; Mabit, Marie.
L'objectif général de l'étude est de simuler les épisodes de contamination de certains bivalves (huîtres et moules) par les toxines d'Alexandrium minutum et A. calenella à partir d'un module expérimental adapté, et en vue de construire un modèle de contamination applicable à ces espèces. Ce modèle sera ensuite susceptible d'être couplé aux modèles biologiques locaux (estuaire de Penzé et étang de Thau) de déterminisme des blooms, ainsi qu'aux modèles hydrodynamiques développés par différentes équipes (Ifremer, Université de Montpellier). La première année (2001-2002) était consacrée à la simulation des contaminations en estuaire de Penzé (Alexandrium minulum) et au développement de cultures en masse d'A. calenella de Thau en bioréacteurs.
Tipo: Text
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00156/26711/24786.pdf

Influence of an oxygen minimum zone and macroalgal enrichment on benthic megafaunal community composition in a NE Pacific submarine canyon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Domke, Lia; Lacharite, Myriam; Metaxas, Anna; Matabos, Marjolaine.
Megafaunal diversity in the deep sea shows a parabolic pattern with depth. It can be affected by factors such as low oxygen concentration, which suppresses diversity, or the presence of submarine canyons, which enhances it. Barkley Canyon, located off the west coast of British Columbia, Canada, is a submarine canyon that extends from the continental margin (200 m) into the deep ocean (2,000 m). This canyon receives drift kelp from shoreline kelp forests and contains an oxygen minimum zone (OMZ) at 500 to 1,500 m depth. Our study investigated the abundance and diversity of epibenthic megafauna over a range of depths (200–2,000 m) and oxygen concentrations (0.5–5.0 ml/L) within Barkley Canyon, as well as changes in abundance near detrital kelp. Video was...
Tipo: Text
Palavras-chave: Barkley Canyon; Benthic surveys; British Columbia; Kelp detritus; Oxygen minimum zone; Submarine canyon.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00416/52773/56793.pdf

Qualité du Milieu Marin Littoral. Bulletin de la surveillance 2013. Départements de Loire Atlantique et Vendée (partie nord)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Océanographie et Dynamique des Ecosystèmes. Unité Littoral. Laboratoire Environnement Ressources Morbihan – Pays de la Loire.
Tipo: Text
Palavras-chave: REMI; REPHY; ROCCH; RESCO; REBENT; DCE.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00190/30120/28582.pdf

Ecology - Managing evolving fish stocks
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Jorgensen, Christian; Enberg, Katja; Dunlop, Erin S.; Arlinghaus, Robert; Boukal, David S.; Brander, Keith; Ernande, Bruno; Gardmark, Anna; Johnston, Fiona; Matsumura, Shuichi; Pardoe, Heidi; Raab, Kristina; Silva, Alexandra; Vainikka, Anssi; Dieckmann, Ulf; Heino, Mikko; Rijnsdorp, Adriaan D.
Evolutionary impact assessment is introduced as a framework for quantifying the effects of 29 harvest-induced evolution on the utility generated by fish stocks.
Tipo: Text
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3302.pdf

Recifes Brasileiros: o Legado de Laborel
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Laborel-deguen, Francoise; Castro, Clovis B.; Nunes, Flavia; Pires, Debora O.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00588/70007/67922.pdf

Tectonics at the axis of the very slow spreading Southwest Indian Ridge: Insights from TOBI side-scan sonar imagery
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gomez, O; Briais, Anne; Sauter, D; Mendel, V.
We present the analysis of the deformation in the axial valley of two contrasted regions of the very slow spreading Southwest Indian Ridge based on side-scan sonar images. Our objective is to investigate how the obliquity is accommodated along the system. We show that the robust magmatic segments have axial valleys and major faults subperpendicular to spreading. The other sections show fault populations with various degrees of obliquity, often arranged in left-stepping echelons, accommodating part of the strike-slip deformation. Side-scan sonar reveals the presence of a corrugated surface near 59 degrees E interpreted to be an incipient detachment fault. We show that the large width of the SWIR oblique sections, and the difference in tectonic style between...
Tipo: Text
Palavras-chave: Mid-ocean ridges; Side-scan sonar; Tectonics; Discontinuities.
Ano: 2006
URL: https://archimer.ifremer.fr/doc/00234/34567/33236.pdf

Evaluation simultanée des biomasses et productions primaires phytoplanctoniques et microphytobenthiques
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bodoy, Alain; Plante-cuny, Marie-reine.
Tipo: Text
Ano: 1980
URL: http://archimer.ifremer.fr/doc/00036/14763/12072.pdf

Le nid, l'oeuf et la larve de Symphodus (Crenilabrus) mediterraneus (LINNÉ, 1758)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Quignard, Jean-pierre.
Les données concernant les oeufs et les larves des Labridés (Poissons, Téléostéens, Perciformes) sont très dispersées dans la littérature scientifique, De plus il est quelquefois très difficile de savoir à quelles espèces les larves décrites appartiennent, la synonymie de ces poissons étant très complexe.
Tipo: Text
Ano: 1967
URL: http://archimer.ifremer.fr/doc/1967/publication-3866.pdf

Effects of a sulfated exopolysaccharide produced by Altermonas infernus on bone biology
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Velasco, C. Ruiz; Baud'Huin, M.; Sinquin, Corinne; Maillasson, M.; Heymann, D.; Colliec-jouault, Sylvia; Padrines, M.
The growth and differentiation of bone cells is controlled by various factors which can be modulated by heparan sulphates. Here, we investigated the effects of an oversulphated exopolysaccharide (OS-EPS) on bone. We compared the effect of this compound with that of a native exopolysaccharide (EPS). Long-term administration of OS-EPS causes cancellous bone loss in mice due, in part, to an increase in the number of osteoclasts lining the trabecular bone surface. No significant difference in cancellous bone volume was found between EPS-treated mice and age-matched control mice, underlying the importance of sulphation in trabecular bone loss. However, the mechanism sustaining this osteoporosis was unclear. To clarify OS-EPS activities, we investigated the...
Tipo: Text
Palavras-chave: Bone metabolism; Bone remodeling; Exopolysaccharide; Glycosaminoglycan; Heparin.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00032/14300/15749.pdf

Effect of Target Strength equation selection on PELGAS anchovy and sardine biomass estimates
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Doray, Mathieu.
Knowledge of the acoustic response of single fish (or Target Strength: TS) is of prime importance for acoustic target classification and abundance estimation. This report investigates the effect of TS~length equation selection on the anchovy and sardine biomass estimates derived from PELGAS acoustic and fishing survey data. We aim at assessing the respective effects of b20 and depth correction terms on anchovy biomass acoustic estimates derived from the PELGAS survey, in order to evaluate the magnitude of a potential non linear effect of fish depth on acoustic biomass estimates. The PELGAS 2012, 2014, 2015 and 2016 survey data are re-analysed using several TS equations with different b20 values and/or depth correction terms to assess the respective effects...
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00377/48839/49265.pdf

Occurrence and characterization of tremolite asbestos from the Mid Atlantic Ridge
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Di Giuseppe, Dario; Perchiazzi, Natale; Brunelli, Daniele; Giovanardi, Tommaso; Nodari, Luca; Della Ventura, Giancarlo; Malferrari, Daniele; Maia, Marcia; Gualtieri, Alessandro F.
Tremolite is one of the most common amphibole species and, in the fibrous form (i.e., characterized by crystals/particles consisting of fibres with length &gt; 5 µm, width &lt; 3 µm and aspect ratio &gt; 3), one of the six asbestos minerals. Until now the attention of crystallographers has focused only on samples from continental environment. Here we report the first chemical and structural data of a tremolite asbestos found along the Mid Atlantic Ridge (MAR) at the eastern intersection of the Romanche Transform Fault (Equatorial MAR). Tremolite is associated with chlorite and lizardite and was formed through the green shale facies lower than zeolite in a predominantly fluid system. MAR tremolite asbestos shows very slight deviations from the ideal crystal...
Tipo: Text
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00685/79703/82492.pdf

Impact de l'aquaculture sur l''environnement: prevention et controle
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Jatteau, P; Petit, J; Duret, J.
The main methods of predicting aquaculture wastes outputs are presented. The statistical methods based on the study of the results of water samples and biological method based on the knowledge of feed features and utilization by fish are discussed. Asserment of the wastes outputs impact on natural environment is than tackled. A critical analysis of the different approaches is made.
Tipo: Text
Palavras-chave: Environmental impact; Aquaculture.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/1993/acte-1330.pdf

Distribution bathymétrique et spatiale des populations de Gryphus vitreus (brachiopode) sur la marge continentale (Nord-Ouest Méditerranée)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Emig, Cc.
Tipo: Text
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00131/24232/22225.pdf

Dynamique et hydrologie de la couche profonde dans l'Atlantique Nord-Est. Campagnes EDYLOC
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vangriesheim, Annick.
Ce document est une présentation des mesures courantométriques et hydrologiques recueillies au cours des campagnes EDYlOC 81 et 82. L'objectif était l'étude des courants et de leur variabilité spa­tiale et temporelle dans la couche de fond associée à l'étude de la structure hydrologique dans la même zone. Dans ce but, un ré­seau de six mouillages portant chacun deux courantomètres a été mouillé en mai 1981 au voisinage du point 47°N, 14°30°W; ceux-ci ont été relevés en avril 1982. Lors de cette seconde campagne, des mesures de néphélométrie ont été effectuées au cours de profils bathysonde.
Tipo: Text
Ano: 1986
URL: https://archimer.ifremer.fr/doc/00419/53068/54007.pdf

Complete Genome Sequence of the Hyperthermophilic, Piezophilic, Heterotrophic, and Carboxydotrophic Archaeon Thermococcus barophilus MP
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vannier, Pauline; Marteinsson, Viggo Thor; Fridjonsson, Olafur Hedinn; Oger, Philippe; Jebbar, Mohamed.
Thermococcus barophilus is a hyperthermophilic, anaerobic, mixed heterotrophic, and carboxydotrophic euryarchaeon isolated from the deep sea hydrothermal vent Snakepit site on the mid-Atlantic ridge at a depth of 3,550 m. T. barophilus is the first true piezophilic, hyperthermophilic archaeon isolated, having an optimal growth at 40 MPa. Here we report the complete genome sequence of strain MP, the type strain of T. barophilus. The genome data reveal a close proximity with Thermococcus sibiricus, another Thermococcus isolated from the deep biosphere and a possible connection to life in the depths.
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00031/14185/11865.pdf

Contribution thématique DCSMM évaluation de l'état initial "pression et impact" - pression "Abrasion" dans la sous-région marine Manche, Mer du Nord salinité DCSMM/EI/MMN
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lorance, Pascal; Leonardi, Sophie.
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00054/16500/14009.pdf

Responses of Planktonic Microorganisms from Tropical Reservoirs to Paraquat and Deltamethrin Exposure
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Leboulanger, C; Bouvy, M; Pagano, M; Dufour, Robert; Got, P; Cecchi, P.
This study focused on the effects of two pesticides, paraquat (herbicide) and deltamethrin (insecticide), which are two common molecules used intensively in Burkina Faso. Natural bacterial populations, phytoplankton cultures (one cyanobacterium, Cylindrospermopsis raciborskii, and one chlorophycea, Monoraphidium sp.), and two species of zooplankton (Diaphanosoma excisum and Moina micrura) were isolated from aquatic communities and were used as biological targets in the experimental protocols. Paraquat was moderately toxic to bacteria and phytoplankton, whereas deltamethrin was significantly toxic only to the zooplankton species. Paradoxically, the chlorophycea Monoraphidium sp. exhibited a significant increase of in vitro fluorescence after 48 h at the...
Tipo: Text
Palavras-chave: West Africa; Reservoirs; Planktonic organisms; Deltamethrin; Paraquat.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-5287.pdf

Ocean Gravity Models From Future Satellite Missions
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Louis, Gilles; Lequentrec-lalancette, Marie-françoise; Royer, Jean-yves; Rouxel, Didier; Géli, Louis; Maïa, Marcia; Faillot, Mathilde.
Over the past 3 decades, satellite altimetry has been a key tool for dynamic ocean studies and for accurately estimating sea surface heights. The geodetic reference surface—the “geoid”—can be approximated as the mean sea surface height of an ocean corrected for dynamic terms such as tides and currents. It is an equipotential surface of the gravity field; and variations of this field are quantified as free‐air anomalies, from which density heterogeneities of the oceanic basement can be inferred. Using such data in combination with other geophysical data, scientists have improved their knowledge of the nature of submarine relief and underlying structures. In solid Earth geophysics, major breakthroughs came from the development of high‐resolution marine...
Tipo: Text
Palavras-chave: Altimetry; High resolution; SWAT soil and water assessment tool.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00451/56260/57829.pdf

Oceanic response to coastal winds with shear
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Richez, C; Philander, G; Crepon, M.
Tipo: Text
Ano: 1984
URL: http://archimer.ifremer.fr/doc/00113/22439/20126.pdf

Argo data management report 2020, Coriolis DAC &amp; GDAC
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Carval, Thierry; Coatanoan, Christine.
This report covers the activity of Coriolis data centre for a one-year period from July 1st 2018 to August 31th 2019.
Tipo: Text
Palavras-chave: Argo; Argo.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00658/77033/78332.pdf

Non-specific activation of antiviral immunity and induction of RNA interference may engage the same pathway in the Pacific white leg shrimp Litopenaeus vannamei
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Labreuche, Yannick; Veloso, Artur; De La Vega, Enrique; Gross, Paul S.; Chapman, Robert W.; Browdy, Craig L.; Warr, Gregory W.
Many questions remain unanswered regarding RNAi-based mechanisms and dsRNA-induced antiviral immune responses in penaeid shrimp. In this study, we report the characterization in the white leg shrimp Litopenaeus vannamei of RNAi pathway associated proteins Lv-Ago 1 and Lv-Ago 2, two members of the Argonaute family of proteins, as well as Lv-sid 1, the first shrimp homologue of Sid-1, a membrane channel-forming protein implicated in the cellular import of dsRNA. To decipher their functional implication in RNAi-related phenomena, we monitored their relative expression following stimulation by specific and non-specific RNA duplexes of diverse length. The findings show that the length of small RNA duplexes plays a critical role in the activation of both...
Tipo: Text
Palavras-chave: Shrimp; Litopenaeus vannamei; RNAi; DsRNA; Argonaute; Sid-1; Antiviral immunity.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00015/12652/9587.pdf

Flottille des capéchades. Façade Méditerranée. 2018. Synthèse des flottilles de pêche.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d’Informations Halieutiques » (SIH) de l’Ifremer, qui constitue le réseau d’observation des ressources halieutiques et des usages associés. Ce projet s’inscrit dans la mission de service d’intérêt public de l’Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l’analyse du secteur des pêches, le SIH a en charge l’élaboration d’indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche et du grand public.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00613/72496/71458.pdf

A New Method of De-Aliasing Large-Scale High-Frequency Barotropic Signals in the Mediterranean Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hu, Denghui; Xu, Yongsheng.
With the development of satellite observation technology, higher resolution and shorter return cycle have also placed higher demands on satellite data processing. The non-tide high-frequency barotropic oscillation in the marginal sea produces large aliasing errors in satellite altimeter observations. In previous studies, the satellite altimeter aliasing correction generally relied on a few bottom pressure data or the model data. Here, we employed the high-frequency tide gauge data to extract the altimeter non-tide aliasing correction in the west Mediterranean Sea. The spatial average method and EOF analysis method were adopted to track the high-frequency oscillation signals from 15 tide gauge records (TGs), and then were used to correct the aliasing errors...
Tipo: Text
Palavras-chave: Tide gauge; EOF analysis; De-aliasing; Altimeter.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00641/75262/75467.pdf

Observations préliminaires recueillies dans l'exécution des programmes entrepris par la station biologique de Roscoff
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bergerard, S.
We have tried to expose here the first observations on the basis of , previous knowledge and studies in progress when the wreck arrived, in particulary of benthic Populations Dynamics by the workers of the Biological Station. These results, still very fragmentary, allow never the less to definite the programs required for the second phase, essentially on the populations of fine deposits of the Morlaix and Lannion bays.
Tipo: Text
Palavras-chave: Pollution; Hydrocarbures; Amoco Cadiz; Sédiments; Phytoplancton; Macrobenthos; Meiobenthos; Microbenthos; Baie de Morlaix; Baie de Lannion; Pollution; Hydrocarbons; Amoco Cadiz; Sediments; Phytoplancton; Macrobenthos; Meiobenthos; Microbenthos; Morlaix Bay; Lannion Bay.
Ano: 1978
URL: http://archimer.ifremer.fr/doc/00306/41725/40936.pdf

DOI de données de la recherche - Questions fréquentes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Merceur, Frederic.
Ce document propose des éléments de réponse à un ensemble de questions fréquemment posées par les scientifiques sur les DOI de données de la recherche.
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00491/60247/63648.pdf

Available Potential Energy in Density Coordinates
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Colin De Verdiere, Alain; Huck, Thierry; Pogossian, Souren; Ollitrault, Michel.
The vertically integrated potential energy of an incompressible stratified fluid formulated in density coordinates can be simply written as a weighted vertical sum of the squares of the vertical displacements of density surfaces, a general expression valid for arbitrary displacements. The sum of this form of potential energy and kinetic energy is then a conserved quantity for the multilayer shallow water model. The formulation in density coordinates is a natural one to find the Lorenz reference state of available potential energy (APE).We describe the method to compute the APE of an ocean state and provide two applications. The first is the classical double-gyre, wind-driven circulation simulated by a shallow water model at high resolution.We show that the...
Tipo: Text
Palavras-chave: Energy transport; Ocean circulation; Ocean dynamics; Isopycnal coordinates.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00464/57521/59707.pdf

Avis de l’Ifremer sur l’ouverture de la pêche au chalut pélagique sur le plateau de l’île d’Yeu du 1er décembre 2020 au 31 janvier 2021
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Biseau, Alain.
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00682/79422/82007.pdf

Statistique des régions de pêche - année 1949 (1er et 2e semestres)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Tipo: Text
Ano: 1951
URL: http://archimer.ifremer.fr/doc/1951/publication-6727.pdf

Survey of stochastic models for wind and sea state time series
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Monbet, Valérie; Ailliot, P; Prevosto, Marc.
The knowledge of sea state and wind conditions is of central importance for many offshore and nearshore operations. In this paper, we make a complete survey of stochastic models for sea state and wind time series. We begin with methods based on Gaussian processes, then non-parametric resampling methods for time series are introduced followed by various parametric models. We also propose an original statistical method, based on Monte Carlo goodness-of-fit tests, for model validation and comparison and this method is illustrated on an example of multivariate sea state time series. (C) 2006 Elsevier Ltd. All rights reserved.
Tipo: Text
Palavras-chave: Model validation; Simulation; Nonlinear time series; Wind; Sea state.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2679.pdf

Parasites nouveaux de la glande digestive des mollusques marins Mytilus edulis L. et Cardium edule L.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Comps, Michel; Grizel, Henri; Tige, Gilbert; Duthoit, Jean-louis.
Some similar stages to those of the digestive gland parasite in the Ostrea edulis have been observed in the Mytilus edulis as well as in the Cardium edule in which the simultaneous presence of some Microsporidia spores was noticed. Their study with an electron microscope enabled the description of their structural specificities and characteristics.
Tipo: Text
Ano: 1975
URL: http://archimer.ifremer.fr/doc/1975/publication-5914.PDF

Connectivity patterns of coastal fishes following different dispersal scenarios across a transboundary marine protected area (Bonifacio strait, NW Mediterranean)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Koeck, Barbara; Gerigny, Olivia; Durieux, Eric Dominique Henri; Coudray, Sylvain; Garsi, Laure-helene; Bisgambiglia, Paul-antoine; Galgani, Francois; Agostini, Sylvia.
The Strait of Bonifacio constitutes one of the rare transboundary Marine Protected Areas (MPA) of the Mediterranean Sea (between Sardinia, Italy and Corsica, France). Based on the hypothesis that no-take zones will produce more fish larvae, compared to adjacent fished areas, we modeled the outcome of larvae released by coastal fishes inside the no-take zones of the MPA in order to: (i) characterize the dispersal patterns across the Strait of Bonifacio; (ii) identify the main potential settlement areas; (iii) quantify the connectivity and the larval supply from the MPAs to the surrounding areas. A high resolution hydrodynamic model (MARS 3D, Corse 400m) combined to an individual based model (Ichthyop software) was used to model the larval dispersal of fish...
Tipo: Text
Palavras-chave: Biophysical model; Early life stages; Reproductive timing; Pelagic larval duration; Corsica; Ichthyoplankton.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00248/35886/34407.pdf

The AMMA field campaigns: accomplishments and lessons learned
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lebel, Thierry; Parker, Douglas J.; Flamant, Cyrille; Hoeller, Hartmut; Polcher, Jan; Redelsperger, Jean-luc; Thorncroft, Chris; Bock, Olivier; Bourles, Bernard; Galle, Sylvie; Marticorena, Beatrice; Mougin, Eric; Peugeot, Christophe; Cappelaere, Bernard; Descroix, Luc; Diedhiou, Arona; Gaye, Amadou; Lafore, Jean-philippe.
The AMMA (African Monsoon Multidiscplinary Analysis) field programme aimed at documenting the West African Monsoon (WAM) climate system, in all its geophysical components. It also includes an important socio-economic component. Encompassing a wide range of spatial and time scales, AMMA is one of the most ambitious such programmes ever set up. While the key accomplishments of AMMA are summarised in this paper, a few lessons of broad interest are also drawn both as a tribute to the extraordinary efforts made by a community of several hundreds of people and as possible guidelines for ensuring a long lasting future to integrated climate and environmental studies in West Africa.
Tipo: Text
Palavras-chave: Field campaigns; Instrument deployment; Long-term monitoring; Capacity building; West Africa.
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00214/32510/30990.pdf

Exploring Machine Learning to Correct Satellite-Derived Sea Surface Temperatures
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Picart, Stephane Saux; Tandeo, Pierre; Autret, Emmanuelle; Gausset, Blandine.
Machine learning techniques are attractive tools to establish statistical models with a high degree of non linearity. They require a large amount of data to be trained and are therefore particularly suited to analysing remote sensing data. This work is an attempt at using advanced statistical methods of machine learning to predict the bias between Sea Surface Temperature (SST) derived from infrared remote sensing and ground “truth” from drifting buoy measurements. A large dataset of collocation between satellite SST and in situ SST is explored. Four regression models are used: Simple multi-linear regression, Least Square Shrinkage and Selection Operator (LASSO), Generalised Additive Model (GAM) and random forest. In the case of geostationary satellites for...
Tipo: Text
Palavras-chave: Machine learning; Systematic error; Sea surface temperature; Random forest.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00426/53797/54721.pdf

SYNThèse et Analyse des données eXistantes sur un écosystème profond transfrontalier : le gouf de Capbreton – « SYNTAX »
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sanchez, Florence; Santurtun, Marina.
Le présent rapport s‘articule en trois parties : 1) La première partie concerne un travail bibliographique sur les généralités des canyons sous marins, avec une présentation du gouf de Capbreton et les limites géographiques de l‘étude ; 2) La deuxième partie présente un état des lieux des connaissances disponibles sur le secteur du gouf de Capbreton. Elle comprend : i) un volet physique qui détaille le contexte géologique et hydrodynamique du canyon ; ii) un volet biologique avec un point consacré à l‘analyse des populations des cétacés et oiseaux marins ; un autre point décrit les ressources démersales et benthiques à partir des données issues des campagnes scientifiques (Campagnes EVHOE et ITSASTEKA) avec une revue détaillée des données disponibles sur...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00137/24787/22858.pdf

Les travaux du groupement national materiaux composites en technologie navale
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Baudin, M.
This communication presents a research programme concerned with the behaviour of composite materials used in marine structures, including properties, calculation methods, fire behaviour, and fabrication. Conclusions from this project will be presented in the form of recommendation cards which will help French manufacturers to obtain gains in productivity, competitiveness and quality.
Tipo: Text
Palavras-chave: Tests; Materials testing; Fire; Methodology; Mathematical models; Ship design; Ship technology; Composite materials.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-1048.pdf

Deep Crustal Structure of the North-West African Margin from Combined Wide-angle and Reflection Seismic Data (MIRROR Seismic Survey)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Biari, Youssef; Klingelhoefer, Frauke; Sahabi, Mohamed; Aslanian, Daniel; Schnurle, Philippe; Berglar, K.; Moulin, Maryline; Mehdi, K.; Graindorge, D.; Evain, Mikael; Benabdellouahed, Massinissa; Reichert, C.
The structure of the Moroccan and Nova Scotia conjugate rifted margins is of key importance for understanding the Mesozoic break-up and evolution of the northern central Atlantic Ocean basin. Seven combined multichannel reflection (MCS) and wide-angle seismic (OBS) data profiles were acquired along the Atlantic Moroccan margin between the latitudes of 31.5° and 33° N during the MIRROR seismic survey in 2011, in order to image the transition from continental to oceanic crust, to study the variation in crustal structure and to characterize the crust under the West African Coast Magnetic Anomaly (WACMA).  The data were modeled using a forward modeling approach. The final models image crustal thinning from 36 km thickness below the continent to approximately 8...
Tipo: Text
Palavras-chave: Moroccan continental margin; Wide-angle seismic modeling; Deep crustal structure; Ocean continent transition.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00273/38401/36726.pdf

Compte rendu de la prospection du gisement de coquilles Saint-Jacques de Saint-Malo. 2015
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fifas, Spyros.
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00298/40900/79656.pdf

Etude des sédiments dragués par le président Théodore Tissier. Sixième croisière (Manche-plateau continental Celte-Mer d'Irlande-Mer du nord)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Berthois, L; Furnestin, Jean.
Le matériel étudié dans ce travail a été dragué par le Navire océanographique de l'Office des Pêches, le Président-Théodore-Tissier, durant la campagne de recherches effectuée de juillet à septembre 1936, en mer d'Irlande, en mer du Nord et en Manche. No s avons utilisé diverses méthodes pour l'étude des sédiments, et comparé nos différents résultats. [OCR NON CONTRÔLE]
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1938
URL: http://archimer.ifremer.fr/doc/1938/publication-6909.pdf

Obliquity pacing of the western Pacific Intertropical Convergence Zone over the past 282,000 years
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Liu, Yi; Lo, Li; Shi, Zhengguo; Wei, Kuo-yen; Chou, Chien-ju; Chen, Yi-chi; Chuang, Chih-kai; Wu, Chung-che; Mii, Horng-sheng; Peng, Zicheng; Amakawa, Hiroshi; Burr, George S.; Lee, Shih-yu; Delong, Kristine L.; Elderfield, Henry; Shen, Chuan-chou.
The Intertropical Convergence Zone (ITCZ) encompasses the heaviest rain belt on the Earth. Few direct long-term records, especially in the Pacific, limit our understanding of long-term natural variability for predicting future ITCZ migration. Here we present a tropical precipitation record from the Southern Hemisphere covering the past 282,000 years, inferred from a marine sedimentary sequence collected off the eastern coast of Papua New Guinea. Unlike the precession paradigm expressed in its East Asian counterpart, our record shows that the western Pacific ITCZ migration was influenced by combined precession and obliquity changes. The obliquity forcing could be primarily delivered by a cross-hemispherical thermal/pressure contrast, resulting from the...
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00334/44545/44258.pdf

Inventaire, diagnostic écologique et restauration des principaux bancs d’huitres plates en Bretagne : le projet FOREVER
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pouvreau, Stephane; Cochet, Hélène; Gachelin, Sonia; Chaudemanche, Samuel; Fabien, Aurélie.
L’huitre plate native des côtes européennes, est une espèce emblématique de Bretagne. Convoitée depuis l'Antiquité, sur-pêchée au 19ème siècle, fleuron de l'ostréiculture au 20ème, elle est désormais menacée de disparition à l'aube du 21ème. Sous l'impulsion de la commission OSPAR mais aussi dans un contexte grandissant de crise écologique et d'érosion de la biodiversité imposant une nécessaire conservation et/ou restauration de nos patrimoines naturels, une alliance européenne réunissant biologistes et gestionnaires a été créée en novembre 2017 à Berlin sous l'égide de l'Agence Allemande de Conservation de la Nature (BFN) avec un seul objectif : favoriser le retour de l'huitre plate sur les côtes. Cette alliance européenne pour la restauration de l'huitre...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00505/61629/65551.pdf

Integrating Cultural Ecosystem Services in an Ecosystem Satellite Account: A Case Study in the Gulf of Saint-Malo (France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Martin, Jean Christophe; Mongruel, Remi; Levrel, Harold.
This paper develops an accounting approach for estimating cultural ecosystem services. Ecosystem satellite accounts should be able to include cultural ecosystem services, which raise numerous assessment difficulties. A new assessment method is proposed, which uses the production for own use of households who carry out recreational activities depending on cultural ecosystem services. An application is carried out in the Gulf of Saint-Malo (France). A survey was implemented in order to collect the accounting data. Six recreational activities mixing the consumption of pure leisure (mainly sport) and marine cultural ecosystem services (mainly fishing and seascape watching) were considered: onshore fishing and shellfish gathering; hiking; recreational boating...
Tipo: Text
Palavras-chave: Ecosystem satellite account; Household production function; Cultural ecosystem services; Recreational activities.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00392/50380/51393.pdf

Instabilites sous-marine etudiees par submersibles
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Savoye, Bruno.
Sediment instability appears to be important as a part of global sedimentary budget. Among the various types of sedimentary instabilities, submarine slides are probably the most spectacular and the hardest to study and predict, although their consequences on human and industrial marine activities can be dramatic. IFREMER is conducting a research project on this topic. An area off Nice (France) has been particularly studied because of its recent activity. Mapping and instability area detection have been carried out. With the possibility of direct interactive observation and highly accurate submarine in -situ operation, the submersible is an extremely efficient tool for sediment studies, but diving purposes have to be precisely defined to provide useful...
Tipo: Text
Palavras-chave: Sediments; Instability; Sedimentology; Sedimentary structures; Ocean floor; Marine technology; Geology; Submersibles; Unmanned vehicles.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/1990/acte-1150.pdf

The quality of Pecten maximus sperm
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Faure, Catherine; Devauchelle, Nicole; Girard, J.p; Cosson, J.
Sperm of the scallop Pecten maximus (L.) can be collected by various methods for artificial reproduction. Characteristics such as spermiation time, fertilizing capacity, respiration and motility of the spe can be modified by collection method. In the current study, sperm was collected quickly by scarification, but its quality was only average. When thermal shock or serotonin injection was used to stimulate the release of sperm, it was collected and concentrated as "dry" as possible after exit fr the kidney. Its quality was comparable to that of diluted sperm collected after thermal shock, a technique commonly used in bivalve hatcheries. The results also showed that serotonin injection systematically decreased spermiation time and induced the production of...
Tipo: Text
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00044/15547/12934.pdf

LOUPE- Observation de l'habitat et des communautés associées dans le contexte des pêcheries du Gouf de Capbreton
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Morandeau, Gilles; Sanchez, Florence; Caill-milly, Nathalie; Morandeau, Fabien.
Le projet LOUPE a pour objectif général d’acquérir des données complémentaires relatives aux pêcheries à partir d’observations à la mer sur des navires professionnels, avec le recueil de données spatialisées de l’effort de pêche et des captures associées (commerciales et rejets). Ces données sont complétées par un questionnaire socio-économique. Le but est de fournir des indicateurs simples prenant en considération les dimensions écologiques, économiques et sociales pour éclairer les choix des gestionnaires et favoriser la mise en œuvre et l’efficacité de la gouvernance pêche dans cet espace. Le projet propose également de mettre en œuvre un système vidéo fixe et autonome (VECOC) pour réaliser des observations vidéo sous-marines et permettre ainsi...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00154/26568/24699.pdf

Amélioration de l'évaluation des stocks de mollusques cultivés en Charente- Maritime
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bacher, Cedric; Deslous-paoli, Jean-marc; Heral, Maurice; Prou, Jean.
The expansion of shellfish culture businesses (oysters, mussels, clams...) gives way to a competition for the use of limited food resources, especially in the Marennes-Oléron basin where water circulation is slow. Increasing the amount of cultivated molluscs leads, from a biological point of view, to:- a drop in growth performances- a rise in chronic mortalities, higher and higher, due to a weakness in the physiological state with a lack of stocks which would have compensated the habitat seasonal shortages (end of winter, etc...)- a greater weakness to diseases, linked to a deficient physiological state and a density rise which increases the proximity rate and thus, parasite propagation speed.For these primary reasons, and for the future of oyster culture,...
Tipo: Text
Palavras-chave: Modélisation; Estimation; Echantillonnage; Mollusques; Marennes Oléron; Evaluation stocks.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/rapport-3841.PDF

Modification du régime des courants. Sous-région marine Mers celtiques. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lazure, Pascal.
Tipo: Text
Palavras-chave: Mers celtiques; Courants régionaux; Modifications; Impacts des activités marines.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00328/43966/43538.pdf

La matière organique dans les dépôts de l'archipel de Kerguelen. Distribution spatiale et saisonnière
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Delille, D; Gadel, F; Cahet, G.
Tipo: Text
Ano: 1979
URL: http://archimer.ifremer.fr/doc/00122/23328/21151.pdf

Analytical Techniques for the Doppler Signature of Sea Surfaces in the Microwave Regime-I: Linear Surfaces
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Nouguier, Frederic; Guerin, Charles-antoine; Soriano, Gabriel.
This paper is the first in a series of two papers on the use of combined improved hydrodynamic and electromagnetic analytical models for the simulation of the ocean Doppler spectrum at microwave frequencies. Under a linear assumption for the sea surface, we derive statistical expression for the main Doppler characteristics according to asymptotic scattering models. We consider classical models such as the Kirchhoff approximation and the two-scale model, as well as the more recent weighted curvature approximation (WCA). We recover two salient features of Doppler signature in the microwave regime. First, the Doppler characteristics are very sensitive to polarization, with higher mean Doppler shift in horizontal polarization. This is correctly rendered by the...
Tipo: Text
Palavras-chave: Doppler spectrum; Gravity waves; Microwave; Remote sensing; Rough surfaces; Scattering; Sea surface.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00054/16524/14379.pdf

Corrigenda of ’Explicit wave-averaged primitive equations using a Generalized Lagrangian Mean’
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ardhuin, Fabrice; Rascle, Nicolas; Belibassakis, K. A.
Ardhuin et al. (2008) gave a second-order approximation in the wave slope of the exact Generalized Lagrangian Mean (GLM) equations derived by Andrews and McIntyre (1978), and also performed a coordinate transformation, going from a from GLM to a ’GLMz’ set of equations. That latter step removed the wandering of the GLM mean sea level away from the Eulerian-mean sea level, making the GLMz flow non-divergent. That step contained some inaccuarate statements about the coordinate transformation, while the rest of the paper contained an error on the surface dynamic boundary condition for viscous stresses. I am thankful to Mathias Delpey and Hidenori Aiki for pointing out these errors, which are corrected below.
Tipo: Text
Palavras-chave: Wave-current; GLM; Air-sea.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00380/49165/49601.pdf

Cumulative effects of marine renewable energy and climate change on ecosystem properties: Sensitivity of ecological network analysis
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Nogues, Quentin; Raoux, Aurore; Araignous, Emma; Chaalali, Aurelie; Hattab, Tarek; Leroy, Boris; Ben Rais Lasram, Frida; David, Valérie; Le Loch, Francois; Dauvin, Jean-claude; Niquil, Nathalie.
In an increasingly anthropogenic world, the scientific community and managers have to take interactions between the drivers of ecosystems into consideration. Tools like ecological network analysis (ENA) indices offer the opportunity to study those interactions at the ecosystem level. However, ENA indices have never been used to test the incidence of cumulative drivers. The present study uses models combining the effects of (i) the reef caused by the future offshore wind farm of Courseulles-sur-Mer and (ii) climate change on species distribution, to test the response of multiple ENA indices. ENA indices proved sensitive to this cumulative impact, displaying a wide variety of cumulative effects. They were also very powerful to characterize the role of the...
Tipo: Text
Palavras-chave: Cumulative impact; Linear inverse modeling; Marine renewable energies; Ecological network analysis; ENA food web.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00658/77012/78274.pdf

Performances de croissance de l'huître creuse, Crassostrea gigas (Thunberg) dans le bassin d'élevage de Marennes-Oléron entre 1979 &amp; 1982
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Berthome, Jean-paul; Prou, Jean; Bodoy, Alain.
Growth of the japanese oyster, Crassostrea gigas was monitored during 4 years, by following the recruitment of the year 1978, held in rearing conditions. After three and half years, the average length was la cm and the average total weight was 80 g. Clear seasonal changes were observed on the growth in length and weight.  An  important loss in dry weight occured in July, during the release of gametes. Such losses constituted 29 %, 43 % and 60 % of the dry weight, respectively for individuals which were 2 years, 3 years and 4 years old. The higher instantaneous growth rates  (G) were observed during spring and at the beginning of summer. Growth model of Von Bertalanffy, gave the best estimate for the length growth of the species. During the 1979-1982...
Tipo: Text
Palavras-chave: Growth parameter; Growth model; Reardd stock; Crassostrea gigas; Oyster; Growth; Descripteurs de croissance; Modèle de croissance; Stock cultivé; Crassostrea gigas; Huître; Croissance.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/publication-2967.pdf

Avis sur le projet d'extension de la station d'épuration de l'Aiguillon sur Mer et de la Faute sur Mer
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thomas, Gerard.
Tipo: Text
Ano: 1999
URL: https://archimer.ifremer.fr/doc/00136/24750/22816.pdf

Etude de la mortalité des moules dans le Pertuis Breton en 1989
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dardignac, Marie-jose; Bodoy, Alain; Garnier, Jacqueline; Heurtebise, Serge; Legrand, Jacqueline.
Une recherche des causes de la mortalité des moule au printemps dans le Pertuis Breton a été entreprise en 1989. La faible pluviométrie observée cette année là n'a pas entrainé de dessalures importantes et les mortalités constatées ont été si faibles qu'elles n 'ont pas eu de conséquences sur la production de moules. Les essais réalisés en milieu contrôlé ont montré que même pendant la période de reproduction au cours de laquelle les moules sont plus fragiles, il fallait des salinités inférieures à 15 p . mille et se maintenant pendant plusieurs jours avant que des mortalités n 'apparaissent. Il est prévu de remettre le même programme en place au printemps 1990.
Tipo: Text
Palavras-chave: Moules; Bouchots; Mortalités; Pollution; Pertuis Breton.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00048/15902/13330.pdf

Bathymetric reconstruction method : application to the central atlantic basin between 10°N and 40°N
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chenet, P. Y.; Francheteau, Jean.
It is well known that a general relationship exists between the age of the earth's crust at mid-ocean ridges and its depth (Menard, 1969; Sclater and Francheteau, 1970; Sclater et al., 1971). Depths increase from 2500  300 meters at a spreading center, to 5800  5300 meters in oceanic crust of Early Cretaceous to Late Jurassic age (Figure 1; Sclater et al., 1971). The 3 km deepening of the oceanic crust can be satisfactorily explained by simple models involving the thermal structure of the oceanic lithosphere during its spreading from the axis of ridges to the adjacent oceanic basins (Sclater and Francheteau, 1970; Davis and Lister, 1974). It has also been suggested that structural highs like aseismic ridges, which have not come about by accretion,...
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1980
URL: http://archimer.ifremer.fr/doc/1980/publication-5393.pdf

Caractérisation et quantification moléculaires de l’écosystème microbien d’altération du saumon cru et des crevettes cuites
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mace, Sabrina.
Raw salmon and cooked shrimp sold in supermarket are usually found under vacuum or CO2 modified atmosphere packaging (MAP). This type of packaging inhibit growth of some bacteria, therefore, CO2 tolerant bacteria dominate spoilage microbiota of these products. The aim of this study is to improve knowledge about bacteria involved in spoilage. Spoilage microbial ecosystems of raw salmon and tropical cooked shrimp were described using classic miocrobiological and molecular methods like PCR-TTGE and pyrosequencing. Lactic acid bacteria, notably Lactococcus piscium, Carnobacterium maltaromaticum, Carnobacterium divergens, Lactobacillus sakei, and Gram negative bacteria like Photobacterium phosphoreum and Enterobacteriaceae (Serratia spp.) has been described as...
Tipo: Text
Palavras-chave: Produits de la mer; Microbiote; PCR-TTGE; Pyroséquençage; Potentiel d’altération; P. phosphoreum; PCR en temps-réel; Seafood products; Microbiota; PCR-TTGE; Pyrosequencing; Spoilage potential; P. phosphoreum; Real-time PCR.
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00166/27773/25963.pdf

Report of the Working Group on the Effects of Extraction of Marine Sediments on the Marine Ecosystem (WGEXT) 16–20 April 2012 Rouen, France
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ICES.
The Working Group on the effects of extraction of marine sediments on the marine ecosystem (WGEXT) met in Rouen, France between 16 and 20 April 2012. Twelve par-ticipants from six ICES member countries attended the meeting. The objective of WGEXT is to provide a summary of data on marine sediment extrac-tion, marine resource and habitat mapping, changes to the legal regime, and research projects relevant to the assessment of environmental effects. A continued decline in amounts of extracted marine sediments across member coun-tries was identified by WGEXT although this was not the case for each country re-porting data. Similarly to previous years, no significant changes to the policies and procedures for managing marine sediment extraction were reported,...
Tipo: Text
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00160/27095/25264.pdf

Distribution of nutrients and chlorophyll-a in the aegean sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kucuksezgin, F; Balci, A; Kontas, A; Altay, O.
The distributions of inorganic nutrients and phytoplankton chlorophyll-a were investigated in relation to the hydrography of the Aegean Sea. The data were collected during cruises in May and October 1992, February, May and October 1993 and July 1994, in the framework of a National Marine Measurement and Monitoring Programme for the Aegean Sea. Concentrations of nitrate +nitrite+ammonia nitrogen and phosphate phosphorus were lower than those previously reported for the Black Sea; generally lowest at the surface, they increased with depth. The highest nutrient values were in the northern part of the Aegean Sea, and may have resulted from water originating from the Black Sea. Both phosphates and silicates increased with depth to maxima of 0.16 and 4.7 mu M,...
Tipo: Text
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00097/20783/18408.pdf

Expérience de repeuplement des fonds à partir de produits d'écloserie
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Audouin, Jacques; De Kergariou, Gabriel.
Over the last decades, the fishing effort focused on crustaceans and especially on the lobster has continued to increase. This way, the number of pots used by each boat has grown from a few dozen to several hundred. This process lead to an overexploitation of the seabed and the catches do not go over 400 tonnes/years despite the increase of the means involved. Consequently, it has been necessary to implement a number of new measures to protect the lobster stock, and some restricted areas have been created off the French coasts.
Tipo: Text
Palavras-chave: Homard; Crustacés; Ecloserie; Reproduction; Repeuplement.
Ano: 1977
URL: http://archimer.ifremer.fr/doc/1977/acte-6578.PDF

Effects of high food-demand fish removal in groups of juvenile sea bass (Dicentrarchus labrax)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Di Poi, C; Beauchaud, M; Bouchut, C; Dutto, Gilbert; Coves, Denis; Attia, J.
In self-feeding conditions, a few individual sea bass (Dicentrarchus labrax (L., 1758)) display strong activity in striking the food dispenser, whereas the remaining individuals of the group actuate the feeder weakly or never. Here, we investigated the effects of removal of the individuals showing dominant activity on the social and feeding behaviours in groups of juvenile sea bass. Following removal, new fish showing a dominant self-feeding activity quickly appear. They always come from the group of fish that have a low number of triggering actuations. This observation shows that it takes less time, about 5 days after the removal of dominant triggerers vs. 14 days at the beginning, for the re-establishment of the behavioural structure, suggesting the...
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4766.pdf

Etude sanitaire du bassin versant du Goyen
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Monfort, Patrick; Le Bec, Claude; Boulben, Sylviane.
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00017/12866/9812.pdf

Evidence for ephemeral middle Eocene to early Oligocene Greenland glacial ice and pan-Arctic sea ice
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tripati, Aradhna; Darby, Dennis.
Earth's modern climate is defined by the presence of ice at both poles, but that ice is now disappearing. Therefore understanding the origin and causes of polar ice stability is more critical than ever. Here we provide novel geochemical data that constrain past dynamics of glacial ice on Greenland and Arctic sea ice. Based on accurate source determinations of individual ice-rafted Fe-oxide grains, we find evidence for episodic glaciation of distinct source regions on Greenland as far-ranging as similar to 68 degrees N and similar to 80 degrees N synchronous with ice-rafting from circum-Arctic sources, beginning in the middle Eocene. Glacial intervals broadly coincide with reduced CO2, with a potential threshold for glacial ice stability near similar to 500...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00434/54587/55976.pdf

Observations sur l'état des stocks démersaux des accores du golfe du Lion
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Campillo, Albert; Dremiere, Pierre-yves.
The areas of the continental shelf neighbouring the valleys and deep sectors of the slope of the gulf of Lion, are hardly or not at all exploited by the French fleet, especially in its central and eastern part, for multiple reasons: distance from the coast, high fuel expenses, meeting the times set, complexity of the canyons' and their surroundings' morphology, mistral wind frequently blowing. This study aims to define the fisheries located on the flexure and the slope on the three following areas: east of Port-Vendres, south of Sète, south of the gulf of Fos, in order to compare their status, as far as performances and the composition, in size, of the most represented species are concerned.
Tipo: Text
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/publication-6700.pdf

Evaluation de la qualité des zones de production conchylicole. Département : Charente-Maritime. Edition 2019
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Morin, Dimitri.
Après un rappel des objectifs, du fonctionnement et de la méthode d’interprétation des résultats du réseau de contrôle microbiologique REMI et du réseau de surveillance chimique ROCCH, ce rapport décrit le programme annuel du département de la Charente-Maritime. Il présente l’ensemble des résultats obtenus sur la période 2016-2018, en particulier l’estimation de la qualité microbiologique et chimique des zones de production de coquillages classées.
Tipo: Text
Palavras-chave: REMI; E. coli; Contamination bactériologique des coquillages; ROCCH; Contaminants chimiques; Milieu marin; Classement sanitaire des zones de production; Département de la Charente Maritime (17); LERPC.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00487/59911/63097.pdf

Le programme d’EXTension RAisonnée du PLAteau Continental (EXTRAPLAC). Enjeux pour les trois collectivités ultramarines du Pacifique (Nouvelle-Calédonie, Wallis &amp; Futuna, Polynésie française).
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Loubrieu, Benoit; Roest, Walter; Patriat, Martin; Loubersac, Lionel.
This article replaces the French program of legal extension of the continental shelf named EXTRAPLAC, interesting in particular the 3 overseas collectivities of the Pacific (New Caledonia, Wallis and Futuna and French Polynesia)” It considers this program in the context of the Convention of the United Nations on the Maritime law. It clarifies the governance system of this program set up by the authorities of the State. A specific chapter clarifies the constraints to be respected to build up the necessary file in respect of the international Committee requirements so said UNO Commission of the Limits of the Continental shelf. The article considers then scenarios presented by 3 territories and state of progress of the three cases, both regarding the...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00217/32820/31254.pdf

Gas Hydrates 1: Fundamentals, Characterization and Modeling
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Broseta, Daniel; Ruffine, Livio; Desmedt, Arnaud.
Gas hydrates, or clathrate hydrates, are crystalline solids resembling ice, in which small (guest) molecules, typically gases, are trapped inside cavities formed by hydrogen-bonded water (host) molecules. They form and remain stable under low temperatures – often well below ambient conditions – and high pressures ranging from a few bar to hundreds of bar, depending on the guest molecule. Their presence is ubiquitous on Earth, in deep-marine sediments and in permafrost regions, as well as in outer space, on planets or comets. In addition to water, they can be synthesized with organic species as host molecules, resulting in milder stability conditions: these are referred to as semi-clathrate hydrates. Clathrate and semi-clathrate hydrates are being...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00453/56506/58852.pdf

Seasonal variation of physical, chemical and sensory characteristics of sea bream (Sparus aurata) reared under intensive conditions in Southern Europe
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cardinal, Mireille; Cornet, Josiane; Donnay-moreno, Claire; Gouygou, Jean-paul; Berge, Jean-pascal; Rocha, E.; Soares, S.; Escorcio, C.; Borges, P.; Valente, L. M. P.
This study describes the variability of important quality traits in gilthead sea bream produced under intensive conditions in Southern Europe and purchased in a French market (Nantes). Chemical, sensory and histological characteristics were performed on 18 samples delivered over a year. All fish presented far lower dioxin and DL-PCBs or heavy metals concentrations than the maximum limit level set by EC Regulation, being totally safe for human consumption. Fat content and nutritional values reflected by n-3 and n-6 polyunsaturated fatty acids (PUFA) levels were parameters with high variability according to the season or the fish farm. Values of n-3 PUFA ranged from 0.9% to 8.6% and those of n-6 PUFA from 9.3% to 16.6%, corresponding to a respective...
Tipo: Text
Palavras-chave: Quality parameters; Sea bream; Sparus aurata; Farmed fish; Chemical composition; Fatty acids; Sensory evaluation; Histological characteristics.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00016/12757/9691.pdf

Croissance de Crassostrea gigas en Bretagne en 1989, mise en place d'un reseau d'acquisition de donnees
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lebec, C; Mazurie, Joseph.
To provide updated information on the growth of Crassostrea gigas in Brittany, experimental stations on 8 sites (culture area) were monitored. Biometric measurements (length, width,...), meat composition (proteins, lipids, carbohydrates...), quality, survival and parasitism were observed after 7 months. A descriptive study by principal components analysis was conducted to find the most significative variables explaining the variability and classifying the sites. Six groups of station can be identified by their respective performances that have been screened in detail. An optimal strategy was discussed to establish a most efficient data network in Brittany. The yearly variations will be checked up and their correlations with environmental factors tested...
Tipo: Text
Palavras-chave: ANE; France; Brittany Crassostrea gigas Bivalvia Monitoring Biochemistry Site selection Aquaculture Rearing Experimental research Pond culture Growth.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-918.pdf

Mise au point de l'élevage intensif de la palourde japonaise Ruditapes philippinarum en marais. Influence de la ration alimentaire, du taux de renouvellement de l'eau et de la vitesse de circulation en circuit semi-fermé
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Severin, Patricia; Baud, Jean-pierre; Haure, Joel.
Suite à une étude de faisabilité du grossissement intensif en marais de la palourde japonaise (Ruditapes philippinarum) effectuée en 1988 , une expérimentation ayant pour objectif d'optimiser les conditions d'élevage et de réduire les coûts a été réalisée durant la période de mars à novembre 1989 . L'influence de la ration alimentaire , du taux de renouvellement et de la vitesse de circulation de l ' eau de mer enrichie a été testée en circuit fermé. - Le mode de gestion de l ' eau de mer par recyclage partiel est à proscrire pour l ' élevage intensif de la palourde, il génère une hétérogénéité spatiale importante de la croissance sur toute la longueur des claires expérimentales. - Une influence prépondérante de la quantité de nourriture injectée est mise...
Tipo: Text
Palavras-chave: Aquaculture intensive; Marais maritime; Ruditapes philippinarum.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00048/15887/13309.pdf

Comparative Population Genomics of the Borrelia burgdorferi Species Complex Reveals High Degree of Genetic Isolation among Species and Underscores Benefits and Constraints to Studying Intra-Specific Epidemiological Processes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Jacquot, Maude; Gonnet, Mathieu; Ferquel, Elisabeth; Abrial, David; Claude, Alexandre; Gasqui, Patrick; Choumet, Valerie; Charras-garrido, Myriam; Garnier, Martine; Faure, Benjamin; Sertour, Natacha; Dorr, Nelly; De Goer, Jocelyn; Vourc'H, Gwenael; Bailly, Xavier.
Lyme borreliosis, one of the most frequently contracted zoonotic diseases in the Northern Hemisphere, is caused by bacteria belonging to different genetic groups within the Borrelia burgdorferi species complex, which are transmitted by ticks among various wildlife reservoirs, such as small mammals and birds. These features make the Borrelia burgdorferi species complex an attractive biological model that can be used to study the diversification and the epidemiology of endemic bacterial pathogens. We investigated the potential of population genomic approaches to study these processes. Sixty-three strains belonging to three species within the Borrelia burgdorferi complex were isolated from questing ticks in Alsace (France), a region where Lyme disease is...
Tipo: Text
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00667/77887/80052.pdf

Incertitude et gestion économique des pêcheries internationales : application à la pêcherie du stock Est de thon rouge de l'Atlantique.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Selles, Jules.
Les controverses autour de la gestion des pêches ont pris une large importance au sein de la communauté internationale illustrant la difficulté de combiner diagnostics scientifiques et mesures de gestion pour les pêcheries. Le thon rouge de l'Atlantique (Thunnus thynnus) est l'archétype de la surexploitation et de la mauvaise gestion: surcapacité de pêche, accès ouvert aux eaux internationales, grande valeur marchande et une gouvernance déficiente au niveau national et international. Cette thèse a pour objectif de déterminer empiriquement la manière la plus efficace de gérer une ressource. 1) quels sont les processus économiques (progrès technique, subventions, flexibilité en prix, allocation des droits de propriété, commerce international, organisation...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00502/61364/64980.pdf

Évaluation d’une suite de bio-essais pour la détection et l’étude de composés lipophiles de micro-organismes marins issus de mollusques bivalves et de leur environnement
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Geiger, Marie.
The context of this study was the assessment of the safety of edible bivalve molluscs. Bivalve can indeed accumulate high concentrations of phycotoxins into their hepatopancreas, potentially leading to human intoxication outbreaks after consumption of such contaminated bivalves. In order to ensure the protection of shellfish consumers, regulated toxins are monitored using physico-chemical techniques. In parallel, emerging toxins, that can be putatively produced by microalgae or marine fungi, are monitored using the intraperitoneal mouse bioassay. However, this bioassay suffers ethical and methodological drawbacks. Thus, the objective of this work was to assess the ability of a bioassay suite to detect lipophilic toxins. This suite was composed of three...
Tipo: Text
Palavras-chave: Cytotoxicité; Larves de diptères; Activité antibactérienne; Toxines lipophiles; Micro-algues; Dinoflagellés; Micromycètes; Penicillium; Acide okadaïque; Azaspiracide; Pinnatoxine G; Vulcanodinium rugosum; Prorocentrum lima; Azadinium spinosum; Beauveria brongniartii; Cytotoxicity; Diptera larvae; Antibacterial activity; Lipophilic toxins; Microalgae; Dinoflagellates; Marine fungi; Penicillium; Okadaic acid; Azaspiracid; Pinnatoxin G; Vulcanodinium rugosum; Azadinium spinosum; Prorocentrum lima; Beauveria brongniartii.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00183/29426/27787.pdf

Pinnatoxins’ Deleterious Effects on Cholinergic Networks: From Experimental Models to Human Health
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Delcourt, Nicolas; Lagrange, Emmeline; Abadie, Eric; Fessard, Valérie; Frémy, Jean-marc; Vernoux, Jean-paul; Peyrat, Marie-bénédicte; Maignien, Thomas; Arnich, Nathalie; Molgó, Jordi; Mattei, César.
Pinnatoxins (PnTXs) are emerging neurotoxins that were discovered about 30 years ago. They are solely produced by the marine dinoflagellate Vulcanodinium rugosum, and may be transferred into the food chain, as they have been found in various marine invertebrates, including bivalves. No human intoxication has been reported to date although acute toxicity was induced by PnTxs in rodents. LD50 values have been estimated for the different PnTXs through the oral route. At sublethal doses, all symptoms are reversible, and no neurological sequelae are visible. These symptoms are consistent with impairment of central and peripheral cholinergic network functions. In fact, PnTXs are high-affinity competitive antagonists of nicotinic acetylcholine receptors (nAChRs)....
Tipo: Text
Palavras-chave: Pinnatoxins; Cyclic imines; Vulcanodinium rugosum; Nicotinic acetylcholine receptors; Acute neurotoxicity; Human intoxication; Myasthenia gravis.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00507/61883/65958.pdf

Typage moléculaire en AP-PCR des souches de Vibrio spp. isolées des épisodes de mortalité du Syndrome 93. Perspectives de lutte et conseil de gestion zoosanitaires déduits
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Goarant, Cyrille.
Une étude de typage moléculaire par AP-PCR de souches de Vibrio impliqués dans des épisodes de mortalité d'élevages de crevettes en Nouvelle-Calédonie (Syndrome 93) et au Japon a été réalisée fin 1996 avec le concours de l' Institut Pasteur de Nouvelle-Calédonie. Elle nous a permis une identification rapide des isolats en terme de génospecies ainsi que des discriminations d' intérêt épidémiologique entre les isolats du génospecies majoritaire. Ainsi, des sous-groupes ont été identifiés au sein de l' espéce majoritaire : V. penaeicida. Certains de ces sous-groupes correspondent à des topotypes et permettent de discriminer les isolats du Japon de ceux de Nouvelle-Calédonie, ainsi que ceux de deux baies différentes de Nouvelle Calédonie, distinctes de 50 km...
Tipo: Text
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00274/38541/37061.pdf

Avis sur l'opportunité d'un classement alternatif des zones n° 56.17.4 pour le groupe 3 (estuaire de la Vilaine - baie de la Vilaine) et n° 56.18.1 pour le groupe 3 (baie de Mont Mahé).
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cochennec-laureau, Nathalie; Piquet, Jean-come; Rocq, Sophie.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00512/62412/79411.pdf

Chemical systematics of an intermediate spreading ridge: The Pacific-Antarctic Ridge between 56 degrees S and 66 degrees S
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vlastelic, Ivan; Dosso, Laure; Bougault, Henri; Aslanian, Daniel; Geli, Louis; Etoubleau, Joel; Bohn, Marcel; Joron, Jl; Bollinger, C.
Axial bathymetry, major/trace elements, and isotopes suggest:that the Pacific-Antarctic Ridge (PAR) between 56 degrees S and 66 degrees S is devoid of any hotspot influence. PAR (56-66 degrees 5) samples have in-average lower Sr-87/Sr-86 and Nd-143/Nd-144 and higher Pb-206/(204)pb than northern Pacific midocean ridge basalts (MORB), and also than MORE from the other oceans. The high variability of Pb isotopic ratios (compared to Sr and Nd) can be due to either a;general high mu (HIMU) (high U/Pb) affinity of the southern Pacific upper mantle or to a mantle event first recorded in time by Pb isotopes. Compiling the results of this study with those from the PAR between 53 degrees S and 57 degrees S gives a continuous view of mantle characteristics from south...
Tipo: Text
Ano: 2000
URL: https://archimer.ifremer.fr/doc/00000/10578/9396.pdf

Ocean currents and gradients of surface layer properties in the vicinity of the Madagascar Ridge (including seamounts) in the South West Indian Ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vianello, Patrick; Ternon, Jean-francois; Demarcq, Herve; Herbette, Steven; Roberts, Michael J.
This work is part of the MADRidge Project special issue which aims to describe pelagic ecosystems in the vicinity of three prominent shallow seamounts in the South West Indian Ocean: one here named MAD-Ridge (240 m below the surface) plus Walters Shoal (18 m) on the Madagascar Ridge, and La Pérouse (60 m) on the abyssal plain east of Madagascar. The three span latitudes 20°S and 33°S, some 1500 km. The study provides the background oceanography for the once-off, multidisciplinary snapshot cruise studies around the seamounts. As life on seamounts is determined by factors such as summit depth, proximity to the light layers of the ocean, and the ambient circulation, a first description of regional spatial-field climatologies (16–22 years) and monthly...
Tipo: Text
Palavras-chave: South West Indian Ocean; Madagascar Ridge; Seamounts; Walters shoal; Sea surface temperature; Eddy kinetic energy; Mixed layer depth; Chlorophyll-a; Geostrophic currents.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00634/74581/74476.pdf

Caractéristiques de dragues et pêcheries
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pitel, Mathilde; Berthou, Patrick; Fifas, Spyros.
Basically, a dredge is a bottom-towed gear and consists of a metal frame with a blade or teeth, to dig into the sediment and extract the shelled molluscs, and a mesh bag to collect the catch. Whereas hand dredging is observed on some intertidal beds (Donax trunculus in France), the use of dredge generally needs a fishing boat. There is a great diversity of dredge types, with specific designs used to target different species in particular beds:   Manual dredges for Donax (Donax trunculus), Warty venus (Venus verrucosa) and clams (Venerupis pulastra, Ruditapes sp)   Dredges for King scallops (Pecten maximus)   Dredges for Warty venus (Venus verrucosa)   Dredge for Queen scallops (black and white, Chlamys varia and Chlamys opercularia)   Dredges for small...
Tipo: Text
Palavras-chave: Management; Environmental impact; Spisula; Bittersweet palourdi; Fishing boat; Clam; Dredge; Brittany; Gestion; Impact environnemental; Spisula; Amande; Navire de pêche; Drague; Bretagne.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/rapport-4608.pdf

GF-3 SAR Ocean Wind Retrieval: The First View and Preliminary Assessment
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Wang, He; Yang, Jingsong; Mouche, Alexis; Shao, Weizeng; Zhu, Jianhua; Ren, Lin; Xie, Chunhua.
Gaofen-3 (GF-3) is the first Chinese civil C-band synthetic aperture radar (SAR) launched on 10 August 2016 by the China Academy of Space Technology (CAST), which operates in 12 imaging modes with a fine spatial resolution up to 1 m. As one of the primary users, the State Oceanic Administration (SOA) operationally processes GF-3 SAR Level-1 products into ocean surface wind vector and plans to officially release the near real-time SAR wind products in the near future. In this paper, the methodology of wind retrieval at C-band SAR is introduced and the first results of GF-3 SAR-derived winds are presented. In particular, the case of the coastal katabatic wind off the west coast of the U.S. captured by GF-3 is discussed. The preliminary accuracy assessment of...
Tipo: Text
Palavras-chave: GF-3; Synthetic aperture radar (SAR); Ocean surface wind; Validation.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00396/50731/51435.pdf

Submesoscale streamers exchange water on the north wall of the Gulf Stream
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Klymak, Jody M.; Shearman, R. Kipp; Gula, Jonathan; Lee, Craig M.; D'Asaro, Eric A.; Thomas, Leif N.; Harcourt, Ramsey R.; Shcherbina, Andrey Y.; Sundermeyer, Miles A.; Molemaker, Jeroen; Mcwilliams, James C.
The Gulf Stream is a major conduit of warm surface water from the tropics to the subpolar North Atlantic. Here we observe and simulate a submesoscale (&lt;20km) mechanism by which the Gulf Stream exchanges water with subpolar water to the north. Along isopycnals, the front has a sharp compensated temperature-salinity contrast, with distinct mixed water between the two water masses 2 and 4km wide. This mixed water does not increase downstream despite substantial energy available for mixing. A series of streamers detrain this water at the crest of meanders. Subpolar water replaces the mixed water and resharpens the front. The water mass exchange accounts for a northward flux of salt of 0.5-2.5 psum(2)s(-1), (large-scale diffusivity O (100m(2)s(-1))). This is...
Tipo: Text
Palavras-chave: Ocean mixing; Gulf Stream; Submesoscale mixing; Eddies.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00600/71201/69570.pdf

Mesures d'intervention en milieu naturel : estimation des taux de survie par la dynamique de population, les marquages artificiels ou génétiques
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Laurec, A.
Ce séminaire débute par une intervention de l'animateur qui présente les différents problèmes que pose l'estimation des taux de survie.
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/publication-6056.pdf

Can survival of European flat oysters following experimental infection with Bonamia ostreae be predicted using QTLs?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Harrang, Estelle; Heurtebise, Serge; Faury, Nicole; Robert, Maeva; Arzul, Isabelle; Lapegue, Sylvie.
The present study identifies quantitative trait loci (QTLs) in response to an experimental infection with the parasite responsible for bonamiosis, Bonamia ostreae, in two segregating families of the European flat oyster, Ostrea edulis. We first constructed a genetic-linkage map for each studied family and improved the existing genetic-linkage map for the European flat oyster with a set of SNP markers. This latter map now combines the best accuracy and the best estimate of the genome coverage available for an oyster species. Secondly, by comparing the QTLs detected in this study with those previously published for O. edulis in similar experimental conditions, we identified several potential QTLs that were identical between the different families, and also...
Tipo: Text
Palavras-chave: Ostrea edulis; Single Nucleotide Polymorphism; Disease resistance; Genetic and QTL mapping; Candidate genes.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00271/38244/36429.pdf

A numerical model for the entire Wadden Sea: skill assessment and analysis of hydrodynamics
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Graewe, Ulf; Floeser, Goetz; Gerkema, Theo; Duran-matute, Matias; Badewien, Thomas H.; Schulz, Elisabeth; Burchard, Hans.
A baroclinic three-dimensional numerical model for the entire Wadden Sea of the German Bight in the southern North Sea is first assessed by comparison to field data for surface elevation, current velocity, temperature, and salinity at selected stations and then used to calculate fluxes of volume and salt inside the Wadden Sea and the exchange between the Wadden Sea and the adjacent North Sea through the major tidal inlets. The model is simulating the reference years 2009–2011. An overview of tidal prisms and residual volume fluxes of the main inlets and their variability is given. In addition, data from an intensive observational campaign in a tidal channel south of the island of Spiekeroog as well as satellite images and observations of sea surface...
Tipo: Text
Palavras-chave: Wadden Sea; GETM; Coastal ocean modeling; Tidal straining; Estuarine circulation; Total exchange flow.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00347/45832/45487.pdf

Experimental shift in diet Delta13C: A potential tool for ecophysiological studies in marine bivalves
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Paulet, Yves-marie; Lorrain, Anne; Richard, Joëlle; Pouvreau, Stephane.
To test the potential of diet switching experiments in ecophysiological studies of marine invertebrates, stable carbon isotope ratios were measured at different seasons in the gonad, adductor muscle, digestive gland and gills of scallops (Pecten maximus) and oysters (Crassostrea gigas) held for 15 days on a constant diet of phytoplankton depleted in 13C. The aim of this study was to determine if differences in carbon incorporation could be detected among species, seasons and organs, and if so, whether it was consistent with their known energy-allocation patterns. After offering the new diet, isotope values of the different organs gradually shifted and significant differences among organs, seasons and species were found. A carbon incorporation index (CII)...
Tipo: Text
Palavras-chave: Crassostrea gigas; Pecten maximus; Carbon isotopes; Metabolism; Energy allocation.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1202.pdf

Screening and selection of growth-promoting bacteria for Dunaliella cultures
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Chevanton, Myriam; Garnier, Matthieu; Bougaran, Gael; Schreiber, Nathalie; Lukomska, Ewa; Berard, Jean-baptiste; Fouilland, E.; Bernard, Olivier; Cadoret, Jean-paul.
Previous studies have demonstrated that bacteria influence microalgal metabolism, suggesting that the selection and characterization of growth-promoting bacteria should offer a new strategy for improving industrial algal cultivation. In the present study, 48 cultivable bacteria were isolated from marine microalgae species and identified using 16S rRNA phylogenetic analysis. The recovered bacteria were found to be members of the α- and γ-Proteobacteria, Cytophaga–Flavobacterium–Bacteroides (CFB) and gram-positive monophyletic clusters. To address the effect of these bacteria on the growth of Dunaliella sp. individually, an experimental high-throughput tool was developed to simultaneously compare replicated associations. A two-step approach was used to...
Tipo: Text
Palavras-chave: Microalgae; Dunaliella; Bacteria; Interaction; Bacterial diversity.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00142/25334/24768.pdf

Coral-associated viruses and bacteria in the Ha Long Bay, Vietnam
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thu Pham, The; Thuoc Chu, Van; Viet Ha Bui, Thi; Thuy Nguyen, Thanh; Huy Tran, Quang; Ngoc Mai Cung, Thi; Bouvier, Corinne; Brune, Justine; Villeger, Sebastien; Bouvier, Thierry; Bettarel, Yvan.
Viruses inhabiting the surface mucus layer of scleractinian corals have received little ecological attention so far. Yet they have recently been shown to be highly abundant and could even play a pivotal role in coral health. A fundamental aspect that remains unresolved is whether their abundance and diversity change with the trophic state of their environment. The present study examined the variability in the abundance of viral and bacterial epibionts on 13 coral species collected from 2 different sites in the Ha Long Bay, Vietnam: one station heavily affected by anthropogenic activity (Cat Ba Island) and one protected offshore station (Long Chau Island). In general, viral abundance was significantly higher in coral mucus (mean = 10.6 +/- 2.0 x 10(7)...
Tipo: Text
Palavras-chave: Viruses; Coral-associated bacteria; Mucus; Symbionts; Coral reefs.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00627/73870/73680.pdf

Summer zooplankton metabolism and its relation to primary production in the western Mediterranean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Alcaraz, M.
Oxygen consumption and excretion rates for ammonia and soluble reactive phosphorus (SRP) by mesozooplankton were studied at a series of stations located along a transect between the islands of Mallorca and Menorca during July 1983. As in a previous cruise also made during the summer stratification period (July 1982), vertical profiles of zooplankton biomass showed the existence of a zooplankton maximum, coinciding with the chlorophyll, phytoplankton and super(14)C fixation maxima. The mean zooplankton excretion in the epiplankton layer can provide 13.7-16.8% of the N (as ammonia) and 67.2-76.6% of the P (as SRP) requirements for primary production, assuming a mean carbon-to-nitrogen assimilation ratio (C/N) of 6.65, equal to the mean C/N ratio of the...
Tipo: Text
Ano: 1988
URL: http://archimer.ifremer.fr/doc/00267/37801/35882.pdf

Remote Sensing of Sea Surface Salinity From CAROLS L-Band Radiometer in the Gulf of Biscay
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Martin, Adrien; Boutin, Jacqueline; Hauser, Daniele; Reverdin, Gilles; Parde, Mickael; Zribi, Mehrez; Fanise, Pascal; Chanut, Jerome; Lazure, Pascal; Tenerelli, Joseph; Reul, Nicolas.
A renewal of interest for the radiometric L-band Sea Surface Salinity (SSS) remote sensing appeared in the 1990s and led to the Soil Moisture and Ocean Salinity (SMOS) satellite launched in November 2009 and to the Aquarius mission (launched in June 2011). However, due to low signal to noise ratio, retrieving SSS from L-band radiometry is very challenging. In order to validate and improve L-band radiative transfer model and salinity retrieval method used in SMOS data processing, the Cooperative Airborne Radiometer for Ocean and Land Studies (CAROLS) was developed. We analyze here a coastal flight (20 May 2009), in the Gulf of Biscay, characterized by strong SSS gradients (28 to 35 pss-78). Extensive in-situ measurements were gathered along the plane track....
Tipo: Text
Palavras-chave: L-band; Microwave radiometry; Remote sensing; Retrieval method; Sea surface salinity (SSS); Soil Moisture and Ocean Salinity (SMOS); Wind speed.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00079/18997/16600.pdf

Polar Front around the Kerguelen Islands: An up-to-date determination and associated circulation of surface/subsurface waters
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Park, Young-hyang; Durand, Isabelle; Kestenare, Elodie; Rougier, Gilles; Zhou, Meng; D'Ovidio, Francesco; Cotte, Cedric; Lee, Jae-hak.
The circulation of iron-rich shelf waters around the Kerguelen Islands plays a crucial role for a climatically important, annually recurrent phytoplankton spring bloom over the sluggish shelf region and its downstream plume area along the Antarctic circumpolar flow. However, there is a long-standing confusion about the Polar Front (PF) in the Kerguelen region due to diverse suggestions in the literature for its geographical location with an extreme difference over 10° of latitude. Based on abundant historical hydrographic data, the in situ hydrographic and current measurements during the 2011 KEOPS2 cruise, satellite chlorophyll images, and altimetry-derived surface velocity fields, we determine and validate an up-to-date location of the PF around the...
Tipo: Text
Palavras-chave: Polar Front; Kerguelen; Southern Ocean.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00244/35485/33995.pdf

Lutte contre les salissures marines : approche par procédés enzymatiques.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Leroy, Celine.
Fouling on marine underwater surfaces causes critical and economic problems such as important material biodamages and industrial performances reduction. We chose to test antifouling potential of enzymatic commercial preparations like hydrolases (proteases, glycosidases and lipases) in order to inhibit the first fouling adhesion step: bacterial biofilm formation. An evaluation test of antifouling properties onto marine bacterial adhesion was designed using a mono-incubation of Pseudoalteromonas sp. D41 in microtiter plate and in sterile natural sea water. This test was adapted to screen agents for bacterial adhesion removal or inhibition activities and allowed to test enzymatic preparations toxicity on non adhered bacteria. Inhibition rates according to...
Tipo: Text
Palavras-chave: Fouling; Adhesion; Antifouling; Hydrolases; EPS; DAPI; Microtiter plate; Screening; Pseudoalteromonas sp.; Marine biofilm; Salissure marine; Adhésion; Antisalissure; Hydrolases; EPS; DAPI; Microplaque; Criblage; Pseudoalteromonas sp.; Biofilm marin.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/these-1099.pdf

Preparation d'un plan d'exploitation de la pecherie de petits pelagiques au Maroc dans la zone centre- atlantique : analyse bio-economique de la pecherie
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Meuriot, Eric.
Like other large fisheries of small pelagics in the world, the Moroccan fishery of the Central Atlantic can be considered as a "fishery at risk" insofar as a collapse of the stock is a possibility that cannot be completely ruled out. Unfavourable modifications to the natural environment aggravated by a too intensive exploitation of the resources can bring on such a collapse.  Up until the beginning of the 80s, the level of exploitation of the sardine stock in the Central Atlantic area remained moderate. This moderation is more a reflection of the profitability constraints that the seine fleet is experiencing than a deliberate choice, except as far as foreign ships are concerned.  The opening of the port of Tan Tan since the end of 1981 is likely to make...
Tipo: Text
Palavras-chave: SEM.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/rapport-2558.pdf

Balanced harvest in the real world. Scientific, policy and operational issues in an ecosystem approach to fisheries
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Garcia, Serge M.; Bianchi, Gabriella; Charles, Anthony; Kolding, Jeppe; Rice, Jake; Rochet, Marie-joelle; Zhou, Shijie; Delius, Gustav; Reid, David; Van Zwieten, Paul A. M.; Atcheson, Megan; Bartley, Devin; Borges, Lisa; Bundy, Alida; Dagorn, Laurent; Dunn, Daniel C.; Hall, Martin; Heino, Mikko; Jacobsen, Brigitte; Jacobsen, Nis S.; Law, Richard; Makino, Mitsutaku; Martin, Felix; Skern-mauritzen, Mette; Suuronen, Petri; Symons, Despina.
The concept of the Ecosystem Approach has entered the fishery harvesting discussions both from fishery perspectives (Reykjavik Declaration; FAO 2003 Annex to the Code of Conduct and from the principles of the Ecosystem Approach adopted by the CBD in 1995. Both perspectives establish the need to maintain ecosystem structure and functioning, whether for sustainable use of biodiversity (CBD) or simply to keep exploited ecosystems healthy and productive (fisheries). In response, the “Balanced Harvest” (BH) concept was suggested by a group of scientists brought together by the IUCN Fisheries Experts Group during the CBD CoP 10 in 2010. The meeting and the BH concept as consolidated there highlighted some of the collateral ecological effects of current fishing...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00255/36575/35113.pdf

Phase relationships between millennial-scale events 64,000-24,000 years ago
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Shackleton, Nicholas J.; Hall, Michael A.; Vincent, Edith.
A core recovered on the Iberian margin off southern Portugal can be correlated with Greenland ice cores using oxygen isotope variability in planktonic foraminifera which closely matches the ice core records of temperature over Greenland. Our age model identifies the base of every interstadial between 64,000 and 24,000 years ago and uses the Greenland Ice Core Project (GRIP) timescale. The oxygen isotope signal in benthic foraminifera (on this GRIP-based timescale) is quite different from the planktonic record and resembles the temperature record over Antarctica when this is synchronized with Greenland using the record of methane in the atmospheric air in the polar ice cores. We interpret the benthic record as indicating significant fluctuations in ice...
Tipo: Text
Ano: 2000
URL: https://archimer.ifremer.fr/doc/00220/33114/31671.pdf

North-atlantic sedimentation and paleohydrology during the late quaternary - mineralogical and geochemical data
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Parra, M.
Tipo: Text
Ano: 1982
URL: http://archimer.ifremer.fr/doc/00120/23160/21005.pdf

Cinétique du recrutement et croissance des juvéniles d'Owenia fusiformis Delle Chiaje en baie de Seine (Manche orientale)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dauvin, Jc.
The dynamics and growth of Owenia fusiformis juveniles were studied over a period of three months under different edaphic conditions in the eastern part of the Bay of Seine. Post-larval settlement was synchronous and showed the same high densities in different communities with or without adult populations. There was a rapid disappearance at the juvenile stage in the unfavourable bottoms. The distribution of the juveniles was gregarious. Growth was slow during the first month ; it was also highly variable. Growth differences were observed between stations: growth was higher in the station located just seaward of the Seine estuary. The relationships between edaphism, recruitment and growth of juveniles are discussed in relation to the changes in space and...
Tipo: Text
Palavras-chave: OWENIA-FUSIFORMIS; ANNELIDA-POLYCHAETA; SETTLING; BAY OF SEINE.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00100/21152/18771.pdf

Delayed mode quality control of Ovide Argo Data. Float WMO 6900643
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lagadec, Catherine; Thierry, Virginie; Cabanes, Cecile.
This report presents the delayed mode analysis of an Argo float. Real time quality control flags are checked and interesting profiles are plotted.  The OW method (objective analysis) is used to detect a conductivity sensor drift and correct it, if any.
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00311/42232/41563.pdf

Aquaculture de poisson en Martinique : Compte rendu de mission en martinique du 19 au 26 juillet 1990
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Antona, Martine.
Fish aquafarming is an activity that is starting to take off in Martinique as possible diversification of giant river prawn breeding (Macrobrachium Rosenbergii) which debuted in the middle of the 70s. Two species were involved, one freshwater species (the red tilapia or Saint-Pierre) and a marine species (the redfish or red drum). This mission report presents, in the first section, the local conditions of fish aquafarming development in Martinique – the current characteristics of the breeds, the existing production sector and its management. A second section inventories the main operating constraints of this field – technical or market constraints.
Tipo: Text
Palavras-chave: SEM.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/1990/rapport-2421.pdf

Coastal mesoscale processes and their effect in phytoplankton distribution and community composition in the SE Bay of Biscay
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Davila, Xabier; Rubio, Anna; Artigas, Felipe; Puillat, Ingrid; Manso-narvarte, Ivan; Lazure, Pascal; Caballero, Ainhoa.
Mesoscale dynamics play a major role in several ocean processes, not only in the transport of momentum, heat, mass, particles and microorganisms but also in the provisioning of nutrients into the euphotic zone. Mesoscale processes can define niches where specific phytoplankton species flourish. However, this effect is not straightforward in coastal areas, which are submitted to a more complex interplay between different oceanic processes. In this context, the ETOILE campaign surveyed the CapBreton canyon area in the South-East of Bay of Biscay in early August 2017. The main objective of this study was to link the occurrence and distribution of phytoplankton with the mesoscale ocean processes. On top of the remote sensing data available for this area, such...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00635/74733/74723.pdf

Façade Antilles. 2018. Activité des navires de pêche.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d’Informations Halieutiques » (SIH) de l’Ifremer, qui constitue le réseau d’observation des ressources halieutiques et des usages associés. Ce projet s’inscrit dans la mission de service d’intérêt public de l’Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l’analyse du secteur des pêches, le SIH a en charge l’élaboration d’indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche et du grand public.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00608/72005/70709.pdf

The SARAL/AltiKa mission: A step forward to the future of altimetry
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Verron, Jacques; Bonnefond, Pascal; Andersen, Ole; Ardhuin, Fabrice; Bergé-nguyen, Muriel; Bhowmick, Suchandra; Blumstein, Denis; Boy, François; Brodeau, Laurent; Crétaux, Jean-françois; Dabat, Mei Ling; Dibarboure, Gérald; Fleury, Sara; Garnier, Florent; Gourdeau, Lionel; Marks, Karen; Queruel, Nadège; Sandwell, David; Smith, Walter H.f.; Zaron, Ed.
The CNES/ISRO altimetric satellite SARAL/AltiKa was launched in February 2013 and since then has provided useful data for various scientific and operational applications in oceanography, hydrology, cryospheric sciences and geodesy. However, a Reaction Wheel problem forced relaxation of the repeatability constraint on the satellite’s orbit, which has been drifting slowly since July 2016. Beyond the expected contributions of this mission and its very good integration into the objectives of the constellation of altimetric satellites, it has become more and more apparent that specific contributions and innovations related to the main specification of SARAL/AltiKa, that is to say the use of the Ka-band, have clearly emerged. The advantages of the Ka-band are in...
Tipo: Text
Palavras-chave: Satellite; Altimetry; Ka-band.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00607/71878/70573.pdf

Chargement des données CTD et Bouteilles des campagnes DYFAMED et MOOSE dans la base SISMER
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gourtay - Le Hingrat, Francoise.
Tipo: Text
Ano: 2012

Mesure de la croissance du Maerl en rade de Brest
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Floc'H, Jean-yves.
Sur les côtes de Bretagne, les bancs de maërl sont constitués par des algues rouges calcaires arbusculaires de la famille des Corallinacées (Rhodophycées, Corallinales). Les Corallinacées sont considérées comme étant des algues à croissance lente et à longévité importante. Cependant peu de données sont acquises sur leurs taux d'accroissement (Edyvean, 1987).
Tipo: Text
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00066/17691/15195.pdf

MONITOOL : New tools for monitoring the Chemical status in transitional and coastal waters under the Water Framework Directive
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Molan, Martin; Amouroux, Isabelle; Arrate, Inaki; Belzunce Segarra, Maria Jesus; Blasco Lorenzo, Alberto; Bolam, Thi; Caetano, Miguel; Correia Dos Santos Romao, Margarida Maria; Cunningham, Darragh; Millan Gabet, Vanessa; Mchugh, Brendan; Merkel, Daniel; Moreno Deus, Enrique; Munes, Susana; Perceval, Olivier; Regan, Fiona; Robinson, Craig; Schintu, Marco; White, Blanaid.
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00620/73183/72370.pdf

Bacterial exopolysaccharides from extreme marine environments with special consideration of the southern ocean, sea ice, and deep-sea hydrothermal vents: A review
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mancuso Nichols, Carol; Guezennec, Jean; Bowman, John.
Exopolysaccharides (EPSs) are high molecular weight carbohydrate polymers that make up a substantial component of the extracellular polymers surrounding most microbial cells in the marine environment. EPSs constitute a large fraction of the reduced carbon reservoir in the ocean and enhance the survival of marine bacteria by influencing the physicochemical environment around the bacterial cell. Microbial EPSs are abundant in the Antarctic marine environment, for example, in sea ice and ocean particles, where they may assist microbial communities to endure extremes of temperature, salinity, and nutrient availability. The microbial biodiversity of Antarctic ecosystems is relatively unexplored. Deep-sea hydrothermal vent environments are characterized by high...
Tipo: Text
Palavras-chave: Ecosystems Hydrothermal Microbial; Polymers EPSs.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-624.pdf

Modelling green macroalgal blooms on the coasts of Brittany, France to enhance water quality management
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Perrot, Thierry; Rossi, Nadege; Menesguen, Alain; Dumas, Franck.
First recorded in the 1970s, massive green macroalgal blooms have since become an annual recurrence in Brittany, France. Eutrophication (in particular to anthropogenic nitrogen input) has been identified as the main factor controlling Ulva ‘green tide’ events. In this study, we modelled Ulva proliferation using a two-dimensional model by coupling hydrodynamic and biological models (coined ‘MARS-Ulves’) for five sites along the Brittany coastline (La Fresnaye Bay, Saint-Brieuc Bay, Lannion Bay, Guissény Bay and Douarnenez Bay). Calibration of the biological model was mainly based on the seasonal variation of the maximum nitrogen uptake rate (VmaxN) and the half-saturation constant for nitrogen (KN) to reproduce the internal nutrient quotas measured in situ...
Tipo: Text
Palavras-chave: 2D model; Ulva; Eutrophication; Brittany coastal waters; Tracers; Nutrient reductions.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00171/28268/26517.pdf

A brief review of nutritional studies for Penaeus monodon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Liao, I; Liu, F.
In order to develop effective formulated for Penaeus monodon , sufficient information is needed on its nutritional requirements. Unfortunately, research on this area has been very limited. This paper outlines the results of such research. Since data on the nutritional requirements of P. japonicus are relatively well established, some of these data are also reviewed in this paper and are used as a basis for assessing the nutritional requirements of P. monodon . Protein, lipid, carbohydrate, mineral and vitamin requirements are evaluated from the parameters of growth survival and feed efficiency. Studies on the effects of enzymes and the development of microparticulate diet for larvae are also summarized.
Tipo: Text
Palavras-chave: Penaeus monodon; Pond culture; Shrimp culture; Amino acids; Fatty acids; Marine crustaceans; Diets; Enzymes; Feed efficiency; Survival; Growth; Vitamins; Carbohydrates; Lipids; Proteins.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1471.pdf

Marine biodiversity and ecosystems' services : an updated research agenda as a follow up of the 2010 targets...
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Goulletquer, Philippe.
The Millenium Ecosystem Assessment (2005) demonstrated that the biodiversity is the keystone for the sustainaibility of present and future ecosystems services. In spite of the highly significant effort carried out by the Census of Marine Life over the last ten years, and an increasing research effort, marine biodiversity and precise ecosystem functioning remain largely unknown and failure to reach the CBD 2010 objectives is obvious. Meanwhile, the concept of ‘ecosystem approach’ is progressing, translated into new policies such as the revised European Common Fisheries Policy (CFP). We might question if the scientific community is ready enough to built scenarios for the future and provide integrated advice to the policy makers for biodiversity conservation...
Tipo: Text
Palavras-chave: Marine biodiversity; Ecosystems; Biodiversity governance; Fisheries management.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00015/12598/9475.pdf

Suivi de quelques facteurs environnementaux dans les pertuis Charentais : de 1992 à 1994
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Arnaud, Christophe.
A study of the environmental factors in the "pertuis charentais" (charentais straits) has been carried out from 1993 tc 1994. The evolution of water temperature and salinity, as weil as the turbidity, are studied. ln the middle of Breton Strait, near to the long lines, the stratification has not been observed, and the salinity variations are much less sharp than in the stations which are located nearer the coast. The photosynthetic pigments concentrations can be very different in the same time at two close stations; in the Antioch Strait and at the long lines, the values of chlorophyll "a" are comparable; they are much higher in the Breton Strait. At the same time, a study has been made on the physical factors, the photosynthetic pigments concentrations,...
Tipo: Text
Palavras-chave: Pertuis charentais; Facteurs physico-chimiques; Turbidité; Pigments chlorophylliens; Seston; "pertuis charentais"; Physical factors; Turbidity; Photosynthetic pigments; Seston.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00082/19282/16877.pdf

Statistiques ISTPM des régions de pêches - année 1952
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Tipo: Text
Ano: 1955
URL: http://archimer.ifremer.fr/doc/1955/publication-6627.pdf

Shellfish viruses
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Renault, Tristan.
Mortalities in a number of commercially important mollusc species have been associated with the detection of viruses belonging to several families. The first description of a virus was in adult eastern oyters, Crassostrea virginica, with the detection of virus particles resembling members of the family Herpesviridae. Subsequently, mass mortalities in French stocks of adult Portuguese oysters, C. angulata, were associated with irido-like virus infection. Other viruses observed in molluscs are described as members of the families Iridoviridae, Papovaviridae and Reoviridae. Little information is available on viral infections that affect molluscs due to primarily to the inadequacy of diagnostic methods that are employed when mass mortality events occur. Most...
Tipo: Text
Palavras-chave: Virus; Scallops; Picornavirus; Oyter herpesvirus 1; Oysters; Molluscs; Irido Like virus; Diseases; Herpesvirus; Clams; Bivalves; Birnavirus; Abalones.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4932.pdf

Moving beyond the age-depth model paradigm in deep-sea palaeoclimate archives: dual radiocarbon and stable isotope analysis on single foraminifera
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lougheed, Bryan C.; Metcalfe, Brett; Ninnemann, Ulysses S.; Wacker, Lukas.
Late-glacial palaeoclimate reconstructions from deep-sea sediment archives provide valuable insight into past rapid changes in ocean chemistry. Unfortunately, only a small proportion of the ocean floor with sufficiently high sediment accumulation rate (SAR) is suitable for such reconstructions using the long-standing age-depth model approach. We employ ultra-small radiocarbon (C-14) dating on single microscopic foraminifera to demonstrate that the long-standing age-depth model method conceals large age uncertainties caused by post-depositional sediment mixing, meaning that existing studies may underestimate total geochronological error. We find that the age-depth distribution of our C-14-dated single foraminifera is in good agreement with existing...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00497/60820/65117.pdf

Accuracy of Wind Measurements Performed on Buoys, Ship, and Island during the TOSCANE-2 Experiment
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Queffeulou, Pierre.
In 1983 the project "Travaux d'Oceanographie Spatiale: Capteurs Actifs dans l'Atlantique Nord-Est" (TOSCANE) was initiated in view of calibration, validation, and use of satelliteborne scatterometer and altimeter measurements in terms of wind and wave data, with special emphasis on the ERS-1 satellite to be launched in 1991 by the European Space Agency. The wind measurements from an array of buoys and ship and land stations, deployed during the last experiment within the program, TOSCANE-2, are described, and a method is given to evaluate their accuracy. When comparing wind data from two measuring stations at sea, the averaging time has to be selected according to the separation distance between the two locations to filter out the space-induced wind...
Tipo: Text
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00182/29313/28271.pdf

Rapport annuel 2005
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
L'année 2005 aura été pour l'Ifremer marquée par la signature avec l'Etat d'un nouveau contrat quadriennal qui constitue la feuille de route de l'établissement pour les années qui viennent. Longuement préparé par des travaux internes à l'établissement, ce contrat valide la continuité des priorités scientifiques de l'Ifremer, dont l'océanographie opérationnelle et la gestion intégrée des zones côtières (GlZC) constituent aujourd'hui de nouveaux défis, tandis que l'approche pluridisciplinaire s'impose plus que jamais dans toutes nos activités, par exemple a travers l'approche écosystémique de l'évolution des ressources halieutiques. [OCR NON CONTRÔLE]
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/rapport-4831.PDF

MYTILOBS1 Campagne 2015-2016 : Réseau d’observation des moules d’élevage sur la côte atlantique et dans la Manche
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Normand, Julien.
La campagne 2015-2016 du réseau MYTILOBS a été marquée par les fortes mortalités subies sur les sites situés en Charente maritime, Vendée et Loire-Atlantique. Pour la 3ème année consécutive, les pertes d’effectifs ont atteint ou dépassé 60 % pour les moules sentinelles déployées sur les 2 sites du Pertuis d’Antioche (Yves et Boyard) et 80% pour les individus élevés dans le Pertuis Breton (Filière, Roulière et Baie de l’Aiguillon). En Baie de Bourgneuf, le site de Maison Blanche qui faisait l’objet de suivi pour la première fois au cours de la campagne 2015-2016, a présenté également des taux de mortalité particulièrement élevés, atteignant 84,2 % en décembre 2016. Comme au cours des précédentes campagnes, les sites situés au nord de l’estuaire de la Loire...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00411/52247/52982.pdf

Plongée à Oursins. Occitanie. 2017. Observation des Marées au débarquement - OBSDEB
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public. Ces indicateurs intègrent...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00596/70835/69068.pdf

Spécificité de la réponse antimicrobienne chez Crassostrea gigas : mécanismes moléculaires de reconnaissance et de signalisation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Green, Timothy; De Lorgeril, Julien; Montagnani, Caroline.
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00172/28329/26616.pdf

Extratropical sources of equatorial Pacific upwelling in an OGCM
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rodgers, Kb; Blanke, Bruno; Madec, G; Aumont, O; Ciais, P; Dutay, Jc.
The extratropical sources of equatorial undercurrent (EUC) water have been identified for an ocean circulation model using Lagrangian trajectory analysis. It has been found that the EUC waters emenate from a wide range of latitudes in the Pacific basin, with its densest constituent watermass being Subantarctic Mode Water (SAMW) from 50degreesS. Further analysis of the basin-scale circulation fields has revealed significant advective diapycnal mass fluxes associated with intergyre exchange. As a result of these diapycnal mass fluxes, the EUC transport as a function of density at 151degreesW (an Eulerian diagnostic) looks quite different from the original subduction rate as a function of density for the same collection of water particles. This implicates...
Tipo: Text
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00000/10613/9403.pdf

Qualité du Milieu Marin Littoral. Bulletin de la surveillance 2016. Edition 2017. Départements des Bouches du Rhône, du Var, des Alpes Maritimes et de Haute‐Corse
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer/ODE/LITTORAL/LER‐PAC/17‐03/Laboratoire Environnement Ressources Provence Azur Corse.
L’Ifremer coordonne, sur l’ensemble du littoral métropolitain, la mise en oeuvre de réseaux d’observation et de surveillance de la mer côtière. Ces outils de collecte de données sur l’état du milieu marin répondent à deux objectifs : - servir des besoins institutionnels en fournissant aux pouvoirs publics des informations répondant aux exigences de la Directive Cadre sur l’Eau (DCE), des conventions de mers régionales (OSPAR et Barcelone) et de la réglementation sanitaire relative à la salubrité des coquillages de production conchylicoles ou de pêche; - acquérir des séries de données nourrissant les programmes de recherche visant à mieux comprendre le fonctionnement des écosystèmes côtiers et à identifier les facteurs à l’origine des changements observés...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00388/49900/50460.pdf

Variations saisonnières de l'absorption de l'azote dans un système brassé peu profond (Manche occidentale)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Maguer, Jf; Lecorre, P; Madec, C.
Seasonal changes in inorganic (NH4+; NO3-; NO2-) and organic (urea) nitrogen uptake were studied with N-15 as a tracer at a shallow station (depth: 22 m) in permanently well-mixed waters of the Western English Channel. Uptake of all the four nutrients was maximum in spring. Nitrate uptake accounted for a third of the total during spring phytoplankton growth, but decrease in summer. This decrease was related to the low ambient nitrate concentrations in early summer and to an inhibition of uptake by high concentrations in late summer. Ammonium was taken up in significant amounts from the beginning of spring (46 % of total uptake), increasing to 59 % in summer. In contrast with nitrate, ammonium concentrations during summer were sufficiently high to saturate...
Tipo: Text
Palavras-chave: Nitrogen; Uptake; Seasonal variations; Western English Channel.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00096/20723/18360.pdf

Tides and low-frequency variations in the equatorial atlantic
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vassie, J.
Tipo: Text
Ano: 1982
URL: http://archimer.ifremer.fr/doc/00120/23167/21012.pdf

Marteilia lengehi n.sp., parasite de l'huitre Crassostrea cucullata Born
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Comps, Michel.
A new record of a parasite designated Marteilia lengehi sp.nov. The Persian Gulf oyster Crassostrea cucullata was the host
Tipo: Text
Palavras-chave: Persian Gulf; ISW; Marteilia lengehi; Crassostrea cucullata; New species; Parasites.
Ano: 1976
URL: http://archimer.ifremer.fr/doc/1976/publication-1802.pdf

Révision des paramètres de croissance de la crevette Penaeus subtilis et étude de la faisabilité d'un modèle ECOPATH de l'écosystème littoral guyanais
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Doquin, Olivier.
The brown shrimp Penaeus subtilis growth parameters has been studied by a lot of biologist since the fisheries of the three Guyana and Brazil has been created. The following through of the French Guyana’s fisheries had hallowed us to have an important database about shrimp boat lending. This atabase had permit us to fine the values used for predictive models helped by software like FISAT 2 in this case. This database had permit us to follow the evolution of the growth parameters along the fifteen last years. This study had given us different results which are interesting. First, the L∞ values used by the COPACO workshop (Isaac et al, 1992) are under evaluated and the K values aren’t. in a second time, the K values of the female brown shrimp are decreasing...
Tipo: Text
Ano: 2004
URL: http://archimer.ifremer.fr/doc/00077/18859/16433.pdf

Real-time PCR assay for rapid detection and quantification of Vibrio aestuarianus in oyster and seawater: A useful tool for epidemiologic studies
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Saulnier, Denis; De Decker, Sophie; Haffner, Philippe.
Because Vibrio aestuarianus is known to cause serious infections in Pacific oyster Crassostrea gigas, a real-time PCR assay was developed targeting the dnaJ gene of this bacterium. Only V. aestuarianus strains isolated from C. gigas mortality events in different geographic areas and the reference strain tested positive, whereas no amplification products was obtained with type strains belonging to 23 other species of Vibrio. Sensitivity and reproducibility of the method were assessed using either seawater or oyster homogenate samples spiked with one V aestuarianus strain. All these samples were stored at -20 degrees C in order to mimic retrospective or grouped natural sample analysis without quantification bias due to prolonged freezing. Analysis of...
Tipo: Text
Palavras-chave: V. aestuarianus; Vibrio; Taqman; Real time PCR; Pathogen; Oyster; Crassostrea gigas.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6447.pdf

Identification of Hypoxia-Regulated Genes in the Liver of Common Sole (Solea solea ) Fed Different Dietary Lipid Contents
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mazurais, David; Ferraresso, Serena; Gatta, Pier Paolo; Desbruyeres, Elisabeth; Severe, Armelle; Corporeau, Charlotte; Claireaux, Guy; Bargelloni, Luca; Zambonino, Jose-luis.
Coastal systems could be affected by hypoxic events brought about by global change. These areas are essential nursery habitats for several fish species including the common sole (Solea solea L.). Tolerance of fish to hypoxia depends on species and also on their physiological condition and nutritional status. Indeed, high dietary lipid content has been recently shown to negatively impact the resistance of sole to a severe hypoxic challenge. In order to study the molecular mechanisms involved in the early response to hypoxic stress, the present work examined the hepatic transcriptome in common sole fed diets with low and high lipid content, exposed to severe hypoxia. The activity of AMP-activated protein kinase (AMPK) was also investigated through the...
Tipo: Text
Palavras-chave: Fish; Hypoxia; Nutrition; Liver; Transcriptome; AMPK.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00169/28062/26474.pdf

Facilities for marine current energy converter characterization
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Germain, Gregory; Bahaj, A.s.; Roberts, P.; Huxley-reynard, C.
The utilization of marine currents for power production offers a sustainable option to augment traditional power technologies and enhance the expansion of renewables. The marine current resource is potentially large and could generate a significant part of the European Union's electricity requirements. Before the installation of marine prototypes, specific trials are necessary to evaluate the behaviour of each system and the ability to exploit tidal or marine currents. This paper presents experimental campaigns carried out on marine energy converter systems under METRI II program performed in the Ifremer free surface hydrodynamic water tunnel. Two of them concern horizontal axis marine current turbine systems: a “classical” pile-mounted tidal turbine...
Tipo: Text
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00023/13436/10444.pdf

Assessing the number of moored fishing aggregating devices through aerial surveys: A case study from Guadeloupe
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guyader, Olivier; Robert, Bauer; Reynal, Lionel.
Moored fish aggregating devices (MFADs) are increasingly being used in small-scale tropical fisheries to access pelagic fish species that are otherwise difficult to harvest in large numbers. Little attention has yet been paid to monitoring MFADs in coastal areas, however. This is most likely due to the small-scale nature of most fisheries that utilize them and the presumed lower impact of those fisheries on fish stocks and their ecosystems. In this paper, we examined the abundance and density of MFADs around Guadeloupe, using aerial line transect surveys. Estimated MFAD densities were found to be high compared with previously reported densities in this area, especially within the 22–45 km range offshore. We examine and discuss possible reasons for these...
Tipo: Text
Palavras-chave: Small-scale fisheries management; Dolphinfish; Yellowfin tuna; Aerial survey; Fish aggregating devices (FAD).
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00355/46605/46727.pdf

Dispersion larvaire et cycle de vie dans les environnements hydrothermaux profonds : le cas de Rimicaris exoculata et d'espèces proches
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hernandez Avila, Ivan.
Deep-water hydrothermal vent host high-biomass communities based on chemoautotrophy supported by the metabolic activity of free-living and symbiotic bacteria associated to invertebrates, especially megafauna. Knowledge on the mechanisms of dispersal and the life cycle of vent species is essential to our understanding of the vent communities in terms of distribution, structure and temporal variation. In this study, I present some advances regarding the dispersal and life cycle of a dominant species of the Mid-Atlantic Ridge (MAR) vent ecosystems, the alvinocaridid shrimp Rimicaris exoculata, and other related species. The methodological approaches applied include morphological descriptions of larvae, analysis of population biology and reproduction, and...
Tipo: Text
Palavras-chave: Sources hydrothermales profondes; Cycle de vie; Structure de population; Symbiose; Crevettes Alvinocarididae; Deep-water hydrothermal vents; Life cycle; Population structure; Reproduction; Dispersal; Symbiosis; Speciation.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00498/60927/64321.pdf

Two-dimensional distribution of living benthic foraminifera in anoxic sediment layers of an estuarine mudflat (Loire Estuary, France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: De Chanvalon, A. Thibault; Metzger, E.; Mouret, A.; Cesbron, F.; Knoery, Joel; Rozuel, Emmanuelle; Launeau, P.; Nardelli, M. P.; Jorissen, F. J.; Geslin, E.
We present a new rapid and accurate protocol to simultaneously sample benthic living foraminifera in two dimensions in a centimeter scale vertical grid and dissolved iron in high resolution (200 μm). Such an approach appears crucial to study foraminiferal ecology in heterogeneous environments. The foraminiferal faunas of the main intertidal mudflat of the Loire estuary are dominated by Ammonia tepida, which accounts for 92 % of the living assemblage (CTG-labeled). Its vertical distribution shows a first density maximum at the surface, a sharp decrease in the next two centimeter followed by a well defined second maximum between 3 and 8 cm depth. The heterogeneity of A. tepida in this 3–8 cm depth layer was calculated by the Moran's Index and reveals lateral...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00277/38786/37335.pdf

Mise au point de techniques d'isolement de parasites - Compte rendu d'activité
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Grizel, Henri; Bachere, Evelyne; Gagneraud, Sylvie; Audic, Guylaine.
Les recherches faisant l'objet de ce contrat ont porté sur la mise au point de techniques adaptées aux bivalves marins et à l'étude du parasite Bonamia ostreae responsable de la maladie hémocytaire de l'huître plate, Ostrea edulis.
Tipo: Text
Palavras-chave: Pathologie; Huître plate; Ostrea edulis; Bonamia ostreae; Techniques laboratoire.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/00015/12626/9514.pdf

Les sources d'incertitude en gestion des pêcheries. Evaluation et propagation dans les modèles
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pelletier, Dominique.
Most North-East Atlantic fisheries are managed by controlling the catch level: a Total Allowable Catch (TAC) is annually agreed for each stock under concern, based on the scientific advice provided by the International Coucil for the Exploration of the Sea (ICES). TAC computations and diagnoses about the stock are achieved by using a model (the Virtual Population Analysis model, VPA) that accounts for the impact of fishing pressure on the dynamics of the population. Commercial catches are the main source of information for assessing the evolution of the demographic structure of the population. Catch sampling yields an estimation of the number fish caught per age-group (Pelletier 1990b). However, sensitivity analyses stress other input parameters which are...
Tipo: Text
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00032/14315/11599.pdf

Biophysical modelling to investigate the effects of climate change on marine population dispersal and connectivity
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lett, Christophe; Ayata, Sakina-dorothee; Huret, Martin; Irisson, Jean-olivier.
Climate may act on the dispersal and connectivity of marine populations through changes in the oceanic circulation and temperature, and by modifying species' prey and predator distributions. As dispersal and connectivity remain difficult to assess in situ, a first step in studying the effects of climate change can be achieved using biophysical models. To date, only a few biophysical models have been used for this purpose. Here we review these studies and also include results from other recent modelling efforts. We show that increased sea temperature, a major change expected under climate warming, may impact dispersal and connectivity patterns via changes in reproductive phenology (e.g., shift in the spawning season), transport (e.g., reduced pelagic larval...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00031/14176/11522.pdf

Evaluation de la qualité des zones de production conchylicole. Département de la Gironde. Edition 2012
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Barbier, Claire; Duval, Magali.
Après un rappel des objectifs, du fonctionnement et de la méthode d’interprétation des résultats du réseau de contrôle microbiologique REMI et du réseau de surveillance chimique ROCCH, ce rapport inclut un bilan national et décrit le programme annuel du département de la Gironde. Il présente l’ensemble des résultats obtenus, en particulier l’estimation de la qualité microbiologique et chimique des zones de production de coquillages classées.
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00073/18469/16019.pdf

INDICATORS – Constructing and validating indicators of the effectiveness of marine protected areas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pelletier, Dominique.
Tipo: Text
Palavras-chave: Ecology and conservation; Natural resource management; Agriculture; Horticulture and forestry.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00177/28834/27460.pdf

Surveillance hydrologique et phytoplanctonique du site AREVA NC (La Hague) Année 2006
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lampert, Luis.
The hydrological (temperature, salinity, nitrate, nitrite, ammonium, phosphate and dissolved oxygen) and phytoplanktonic (biomass and cell abundances) results obtained on the points of Jobourg and Barneville during the nine 2006 cruises, do not enable the characterisation of an influence of non-active waste from the AREVA NC plant of La Hague on the environment.
Tipo: Text
Palavras-chave: AREVA; COGEMA; Manche/Cotentin; Nutriments; Hydrologie; Phytoplancton.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/rapport-3835.pdf

Zinc isotopic variations in ureilites
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Brugier, Yann-aurélien; Barrat, Jean-alix; Gueguen, Bleuenn; Agranier, Arnaud; Yamaguchi, Akira; Bischoff, Addi.
The Ureilite Parent Body (UPB) was a C-rich planetary embryo disrupted by impact. Ureilites are fragments of the UPB mantle and among the most numerous achondrites. Zinc isotopic data are presented for 26 unbrecciated ureilites and a trachyandesite (ALM-A) from the same parent body. The δ66Zn values of ureilites range from 0.40 to 2.71 ‰ including literature results. Zinc isotopic compositions do not correlate with the compositions of olivine cores, with C and O isotopic compositions, with Zn abundances, nor with shock grades. The wide range of δ66Zn displayed by the ureilites is chiefly explained by evaporation processes that took place during the catastrophic breakup of the UPB. During breakup, the high temperatures of the UPB mantle allowed Zn to...
Tipo: Text
Palavras-chave: Ureilite; Zinc isotopic composition; Isotope fractionation; Shock.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00472/58335/60889.pdf

Bilan annuel 2013 L'eau en Bretagne
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Direction Régionale de l’Environnement, de l’Aménagement et du Logement BRETAGNE.
L’année 2013 se caractérise par un printemps pluvieux et une fin d’année marquée par des crues importantes sur toute la région. Globalement, cette année 2013 figure au dessus de la moyenne en termes d’écoulement, avec un total écoulé de 13,59 milliards de m3, soit environ 25 % de plus que la moyenne inter-annuelle.  Les travaux et études de protection et de prévention contre les inondations se sont poursuivis. Le bilan 2013 fait état des travaux relatifs aux atlas des zones inondables, aux plans de prévention des risques. Le bilan de l’eau, donne aussi une information sur la transcription de la directive européenne dite directive inondation.  Le flux d’azote ayant rejoint le littoral est proche en 2013 de 68 000 T de N. La moyenne des concentrations en...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00319/43016/42533.pdf

Molecular identification and localization of filamentous symbiotic bacteria associated with the hydrothermal vent annelid Alvinella pompejana
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cary, S Craig; Cottrell, Matthew T; Stein, Jeffrey L; Camacho, Francisco; Desbruyeres, Daniel.
Alvinella pompejana is a polychaetous annelid that inhabits high temperature environments associated with active deep-sea hydrothermal vents along the East Pacific Rise. A unique and diverse epibiotic microflora with a prominent filamentous morphotype is found associated with the worm's dorsal integument. A previous study established the taxonomic positions of two epsilon proteobacterial phylotypes, 13B and 5A, which dominated a clone library of 16S rRNA genes amplified by PCR from the epibiotic microbial community of an A. pompejana specimen. In the present study deoxyoligonucleotide PCR primers specific for phylotypes 13B and 5A were used to demonstrate that these phylotypes are regular features of the bacterial community associated with A. pompejana....
Tipo: Text
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00336/44734/44830.pdf

Evaluation de la qualité des zones de production conhylicoles. Département du Finistère. Edition 2018
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boulben, Sylviane.
Après un rappel des objectifs, du fonctionnement et de la méthode d’interprétation des résultats du réseau de contrôle microbiologique REMI, ce rapport inclut un bilan national et décrit le programme annuel du département du Finistère. Il présente l’ensemble des résultats obtenus, en particulier l’estimation de la qualité des zones de production de coquillages classées et l’évolution de leur qualité. En 2017, pour quelques zones, le classement en vigueur est discordant avec l’estimation de la qualité. C’est le cas, pour la qualité microbiologique des fouisseurs de l’anse de Penfoul, les niveaux en plomb des moules en rade de Brest, partie sud-est qui sont très mauvais.
Tipo: Text
Palavras-chave: REMI; E. coli; Contamination bactériologique des coquillages; Classement sanitaire des zones de production conchylicole; Département du Finistère.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00441/55269/56763.pdf

Quartier maritime Ajaccio. 2018. Activité des navires de pêche.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d’Informations Halieutiques » (SIH) de l’Ifremer, qui constitue le réseau d’observation des ressources halieutiques et des usages associés. Ce projet s’inscrit dans la mission de service d’intérêt public de l’Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l’analyse du secteur des pêches, le SIH a en charge l’élaboration d’indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche et du grand public.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00608/72045/70749.pdf

Response to domestication and selection for growth in the European sea bass (Dicentrarchus labrax) in separate and mixed tanks
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vandeputte, Marc; Dupont Nivet, M; Haffray, P; Chavanne, H; Cenadelli, S; Parati, K; Vidal, Marie-odile; Vergnet, Alain; Chatain, Beatrice.
Selective breeding of European sea bass (Dicentrarchus labrax) receives a growing interest, as the estimated heritability of growth is medium to high. In this study, we compared the offspring of four groups of sea bass sires, mated with the same wild dams: wild (W), first generation of domestication (D), first generation of mass selection for length (M), first generation of PROSPER-like selection for length (P). The comparison was done both in replicated tanks (separate rearing) and in mixed tanks (mixed rearing) where sire origins were recovered by genotyping of eight microsatellite markers. Weight, length and growth rate were measured from day 238 post-fertilization (69 g mean weight) to day 611 post-fertilization (390 g mean weight). Both in mixed and...
Tipo: Text
Palavras-chave: Nephrocalcinosis; Competition; Microsatellites; Parentage assignment; Realized heritability; Selection response; Growth; Selective breeding; Dicentrarchus labrax; European sea bass.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-5303.pdf

Characterization of tracer cascade in physical space
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hua, Bach-lien; Klein, Patrice; Lapeyre, Guillaume.
Geophysical turbulent fluids are characterized by the presence of organized energetic structures which control tracer transport and stirring, while enabling a tracer cascade down to the smallest scales. In order to understand the physical mechanisms involved in this turbulent tracer cascade, we focus on the dynamics underlying the formation of tracer gradients which are necessarily associated to this cascade. We show that the dynamics of tracer gradients in physical space is mainly governed by their orientation with respect to the compressional eigenvector of the strain tensor. This relative angle results from the competition between strain and the "effective rotation" (due to both vorticity and rotation of strain axes). The implication is that tracer...
Tipo: Text
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00067/17786/15309.pdf

Comparaison, en eau de mer et en eau de forage enrichies, du prégrossissement intensif de jeunes huîtres creuses
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Baud, Jean-pierre; Palvadeau, Hubert; Nourry, Max.
L'optimisation des paramètres d'élevage du prégrossissement contrôlé de juvéniles d'huîtres creuses Crassostrea gigas a été réalisée en nurserie (Bacher et Baud, 1988) à partir de la maîtrise de la production en grands volumes de la diatomée Skeletonema costatum sur eau salée souterraine dans les pays de la Loire, (Baud, 1988). L'analyse économique de cette filière s'est avérée positive, (Baud et al., 1988) et a permis le transfert de cette technologie à une quinzaine d'entreprises conchylicoles situées dans le polder aquacole de la baie de Bourgneuf.
Tipo: Text
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00304/41506/40714.pdf

Regional trends in the fractional solubility of Fe and other metals from North Atlantic aerosols (GEOTRACES cruises GA01 and GA03) following a two-stage leach
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Shelley, Rachel; Landing, William M.; Ussher, Simon J.; Planquette, Helene; Sarthou, Geraldine.
The fractional solubility of aerosol-derived trace elements deposited to the ocean surface is a key parameter of many marine biogeochemical models. Despite this, it is currently poorly constrained, in part due to the complex interplay between the various processes that govern the solubilisation of aerosol trace elements. In this study, we used a sequential two-stage leach to investigate the regional variability in fractional solubility of a suite of aerosol trace elements (Al, Ti, Fe, Mn, Co, Ni, Cu, Zn, Cd, and Pb) from samples collected during three GEOTRACES cruises to the North Atlantic Ocean (GA01, GA03-2010, and GA03-2011). We present aerosol trace element solubility data from two sequential leaches that provide a solubility window, covering a...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00439/55041/56473.pdf

Groupe de travail sur la biologie, la pêche et l'aquaculture potentielle des thons en Méditerranée-Sète (France) 9-11 mai 1978
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
The work group organized jointly by the C.N.E.X.O. (National Centre for the Exploitation of Oceans) and the Fisheries University of Tokyo in collaboration with the Sciences and Techniques University of Languedoc, brought together all the scientists interested in tuna aquaculture in the Mediterranean area. The different topics tackled during this symposium were: the study of the fisheries, the current state of the bluefin tuna biology and fishery in the Mediterranean Sea, the experiences and results of tuna aquaculture in Japan and Canada, the Mediterranean potential, as well as an attempt at setting up an international cooperative research programme on bluefin tuna farming in the western Mediterranean Sea.
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1978
URL: http://archimer.ifremer.fr/doc/1978/publication-6017.pdf

Rapport de la campagne ORHAGO 07 (Observation des Ressources HAlieutiques benthiques de GOlfe de Gascogne). Gwen Drez du 2 novembre au 10 décembre 2007
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Battaglia, Andre; Biais, Gerard.
La campagne Orhago 07 (Observation des Ressources HAlieutiques benthiques de GOlfe de Gascogne) a été réalisée avec le Gwen Drez du 2 novembre au 10 décembre 2007. Suite à un changement d'engin pour passer du chalut à panneau au chalut à perche lors des campagnes Orhago de fin d'année, le recueil d'une nouvelle série de données a été initié. La campagne de 2007 est ainsi la première campagne de cette série qui vise à disposer d'indicateurs de l'évolution de l'abondance de la sole et d'état des peuplements ichtyologiques benthiques du golfe de Gascogne. Le rapport présente l'engin utilisé, les travaux réalisés et des résultats préliminaires, dont une comparaison entre pêches de jour et de nuit.
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00181/29264/27672.pdf

La Baie de Seine: Peuplements et especes benthiques en regime perturbe
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cabioch, L; Retiere, C.
The waters of the Seine River are polluted by urban, industrial and agricultural effluents. In addition direct industrial wastes inputs are emptied into the estuary. Within the limits of the Seine Bay program it was not possible to research pollution impacts on every estuarine ecosystem link; so only benthos have been studied. To take time response of organisms into account, the authors have defined indicators or quantitative evaluation of parameters, reflecting physiological state. They have studied population fluctuations caused by natural or man induced effects.
Tipo: Text
Palavras-chave: Hydrodynamics; Population dynamics; Population structure; Bioaccumulation; Pollution effects; Marine pollution; Ecosystem disturbance; Benthos.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1304.pdf

Caractérisation empirique et détaillée des captures : Contribution à l'approche écosystémique des pêches
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fauconnet, Laurence.
The ecosystem approach of sheries requires to rethink sheries management at integrated scales. Knowledge on shing pressure at the community level remains limited while pressure is the lever by which management operates. This work aims at characterizing in detail catches, that is indirectly shing pressure, and to link its components to different management objectives. For doing so, this work relies on analyses of at-sea observer data. The ecosystem approach of sheries requires to rethink sheries management at integrated scales. Knowledge on shing pressure at the community level remains limited while pressure is the lever by which management operates. This work aims at characterizing in detail catches, that is indirectly shing pressure, and to link its...
Tipo: Text
Palavras-chave: Pression de peche; Metriques de diversite; Rejets; Communautes marines; Gestion ecosystemique des peches; Selectivite; Observations a bord des navires de peche professionnelle; Comparaison d'engins; Analyses multivariees.; Shing pressure; Diversity metrics; Discards; Marine communities; Ecosystem approach to fisheries; Selectivity; Observations onboard professionnal fishing vessels; Gear comparison; Multivariate analyses.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00256/36717/35331.pdf

Assessment of chemical contamination of french coastal lagoons using passive sampling techniques.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Munaron, Dominique; Hubert, Morgane; Tapie, Nathalie; Budzinski, Helene; Guyomarch, Julien; Andral, Bruno; Gonzalez, Jean-louis.
Since 2008, projects supported by french government agencies were dedicated to improve the assessment of chemical contamination of water bodies defined by the Water Framework Directive (WFD, 2000/60/CE)(Munaron et al, 2012).  Among these studies, the aim of PEPSLAG was to investigate the utility of passive samplers for sampling contaminants present at trace levels in coastal lagoons environments, and to realize a first assessment of the contamination on the French Mediterranean coastal lagoons.  23 transitional lagoons water-bodies were investigated along the French Mediterranean coast, using three kinds of passive samplers (DGT, POCIS and SBSE). 141 contaminants from various chemical families (trace metals, pesticides, pharmaceuticals, alkylphenols, PAHs,...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00167/27870/26115.pdf

Demande de diversification en eaux profondes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rollet, Claire.
Tipo: Text
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00157/26776/80844.pdf

Report of the Benchmark Workshop on Flatfish (WKFLAT). 1–8 February 2011, Copenhagen, Denmark
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ICES.
WKFLAT 2011 met from 1st to 8th February 2011 at ICES headquarters in Copenha-gen. The meeting was chaired by Rob Scott (JRC) and the ICES co-ordinator was Jean-Claude Mahé (France). Chris Legault (USA) and Chris Francis (New Zealand) par-ticipated in the meeting as invited external experts. A total of 16 participants from seven countries were in attendance. Stakeholder representatives were in attendance for part of the meeting. The main goals and objectives of the meeting were to evaluate the appropriateness of stock assessment data and methods for five flatfish stocks. These included sole in VIIa, sole in VIIIab, plaice in VIIa, plaice in VIIfg and megrim in IV and VI. For each stock the preferred stock assessment method was determined and the stock...
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00190/30109/28571.pdf

La reproduction des mollusques bivalves en écloserie
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Devauchelle, Nicole.
Optimal gametogenesis and egg-laying environment, fertility, number of egg-layings, reproductor ageing, relationship between parent characteristics and conditioning and farming success, are the main issues considered by bivalve hatcheries each time the reproduction of a species is taken care of. Even if there is still very little bibliographic data on this precise field, reproduction mechanisms have been studied for decades in Mytilidae and Ostreidae. Largely cultivated in open sea, they are indeed an experimental material of choice. In this paper, we will see how the acquired knowledge and the methods developed on this material can be used to carry out a study on bivalve reproduction in hatcheries.
Tipo: Text
Palavras-chave: Ecloserie; Reproduction; Mollusque; Ostreidae; Mytilidae.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/acte-6196.PDF

The Global Ocean Data Analysis Project version 2 (GLODAPv2) - an internally consistent data product for the world ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Olsen, Are; Key, Robert M.; Van Heuven, Steven; Lauvset, Siv K.; Velo, Anton; Lin, Xiaohua; Schirnick, Carsten; Kozyr, Alex; Tanhua, Toste; Hoppema, Mario; Jutterstrom, Sara; Steinfeldt, Reiner; Jeansson, Emil; Ishii, Masao; Perez, Florian; Suzuki, Toru.
Version 2 of the Global Ocean Data Analysis Project (GLODAPv2) data product is composed of data from 724 scientific cruises covering the global ocean. It includes data assembled during the previous efforts GLODAPv1.1 ( Global Ocean Data Analysis Project version 1.1) in 2004, CARINA (CARbon IN the Atlantic) in 2009/2010, and PACIFICA (PACIFic ocean Interior CArbon) in 2013, as well as data from an additional 168 cruises. Data for 12 core variables ( salinity, oxygen, nitrate, silicate, phosphate, dissolved inorganic carbon, total alkalinity, pH, CFC-11, CFC-12, CFC-113, and CCl4) have been subjected to extensive quality control, including systematic evaluation of bias. The data are available in two formats: (i) as submitted but updated to WOCE exchange...
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00383/49409/49886.pdf

Elevage intensif du loup Dicentrarchus labrax
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Coves, Denis; Gasset, Eric.
Different seabass (Dicentrarchus labrax) intensiv rearing technics have been experimented in the pilot scale unit of our laboratory. During these upscalfing operation, the results obtained allow us to compare costs related to each fingemng production method. Closed system combined with early weaning with an efficient micropellet saves at least 69 % of direct production costs by comparison with an open system with Arternia during larval phase. However if closed systems are commonly used by private hatcheries, larval micropellets are always at experimental step.
Tipo: Text
Palavras-chave: Production cost; Early weaning; Closed system; Intensiv; Rearing; D. Labrax; Coût de production; Sevrage précoce; Recyclage; Intensif; Elevage; D. Labrax.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/1993/rapport-1916.pdf

A method for controlled target strength measurements of pelagic fish, with application to European anchovy (     Engraulis encrasicolus     )
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Doray, Mathieu; Berger, Laurent; Le Bouffant, Naig; Coail, Jean-yves; Vacherot, Jean-philippe; De La Bernardie, Xavier; Moriniere, Pierre; Lys, Elisabeth; Schwab, Romain; Petitgas, Pierre.
Measuring fish target strength (TS) in the wild is challenging because: (i) TS varies versus physical (orientation relative to the incident sound wave, size, and depth) and physiological fish attributes (maturity and condition), (ii) the target species and its aforementioned attributes are difficult to assess in near real time, and (iii) in the case of packed fish schools, accepted echoes may originate from multiple unresolved targets. We propose a method for controlled TS measurements of densely packed small pelagic fish during daytime, based on the joint use of a Remotely Operated Towed Vehicle, “EROC”, with a pelagic trawl fitted with a codend opening system, “ENROL”. EROC, equipped with a 70-kHz split-beam echosounder (Simrad EK60) and a low-light...
Tipo: Text
Palavras-chave: Acoustics; Deformed cylinder model; Engraulis encrasicolus; Remotely operated vehicle; Target strength; Video.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00346/45693/45623.pdf

Habitats des fonds marins des côtes de France métropolitaine. Etat du milieu marin et littoral, Etat biologique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: IFREMER.
L’objectif de la fiche est de présenter la manière dont sont confectionnées ces cartes, comment elles peuvent être utilisées dans la mise en oeuvre de politiques publiques et avec quelles limites. Un exemple est présenté de calculs de superficie d’habitats prédominants, dont la préservation est un objectif de bon état écologique, notamment au sein d’aires marines protégées. La connaissance des fonds marins des côtes et du plateau continental français est aujourd’hui essentielle pour assurer une gestion raisonnée et durable de ces espaces soumis à des pressions allant croissant.
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00391/50222/50850.pdf

Les populations d'Asterias rubens L. (Echinodernata : Asteroidea) en Baie de Douarnenez (Finistère)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guillou, Monique.
La prédation des Etoiles de mer sur les populations de Mollusques, en milieu naturel ou en élevage, est un problème dont ont pris conscience depuis bien longtemps, marins, ostréiculteurs et biologistes (FORBES, 1841). Ces espèces dont on connaît bien peu de prédateurs, possèdent de grandes facultés d'adaptation et une extrême fécondité puisque la ponte d'une Asterias rubens est estimée par GEMMIL (1914), à 2.500.000 oeufs en une heure. Ceci tend à augmenter considérablement leur production sur les fonds riches en Bivalves. Distribuée de l'ISLANDE au SENEGAL, Asterias rubens représente l'essentiel de l'épifaune vagile des sables fins de nos régions . Devant l'accroissement continuel de sa production, il est indispensable de pouvoir cerner la dynamique des...
Tipo: Text
Ano: 1981
URL: http://archimer.ifremer.fr/doc/00444/55531/57120.pdf

Période d'éclosion et densité des larves de tourteau (Cancer parus L.) en baie d'Audierne (Bretagne sud) en 1979 et 1980
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Martin, Jocelyne.
Zooplancton was sampled at Plogoff (in the northern part of the bay of Biscay) from April 1979 to march 1981, according to a fortnightly frequency from April to October. This paper presents the results obtained about the larvae of the edible crab (Cancer paqurus L.). For the two annual cycles considered, seasonal variations in abundance of zoeal and megaiopa stages were represented. Variations in abundance of the first zoeal stage permits us to specify the extend of hatching period in the area concerned. Comparison with data from Flamanville (west coast of Cotentin, English Channel) sets off the abundance of the area concerned. NOT CONTROLLED OCR
Tipo: Text
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-3912.pdf

Quartier maritime Marennes. 2019. Activité des navires de pêche.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d’Informations Halieutiques » (SIH) de l’Ifremer, qui constitue le réseau d’observation des ressources halieutiques et des usages associés. Ce projet s’inscrit dans la mission de service d’intérêt public de l’Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l’analyse du secteur des pêches, le SIH a en charge l’élaboration d’indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche et du grand public.
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00650/76212/77175.pdf

Avis sur le projet de schéma des structures des exploitations de culture marine
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rollet, Claire; Le Mao, Patrick.
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00453/56470/79389.pdf

A global wave parameter database for geophysical applications. Part 2: Model validation with improved source term parameterization
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rascle, Nicolas; Ardhuin, Fabrice.
A multi-scale global hindcast of ocean waves is presented that covers the years 1994-2012, based on recently published parameterizations for wind sea and swell dissipation [Ardhuin, F., Rogers, E., Babanin, A., Filipot, J.-F., Magne, R., Roland, A., van der Westhuysen, A., Queffeulou, P., Lefevre, J.-M., Aouf, L., Collard, F., 2010. Semi-empirical dissipation source functions for wind-wave models: Part I. Definition, calibration and validation. J. Phys. Oceanogr. 40 (9), 1917-1941]. Results from this hindcast include traditional wave parameters, like the significant wave height and mean periods, and we particularly consider the accuracy of the results for phenomenal sea states, with significant heights above 14 m. Using unbiased winds, there is no evidence...
Tipo: Text
Palavras-chave: Waves; Hindcast; Air-sea fluxes; Stokes drift; Mean square slope; Seismic noise.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00155/26582/25477.pdf

DCE Milieu Marin. Surveillance et évaluation de l’état des masses d’eau littorales au titre de la Directive Cadre sur l’Eau
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fari, Chloe; Treguier, Cathy; Duval, Magali.
Ce document (poster/plaquette) présente la mise en place du réseau de contrôle de surveillance pour l'évaluation de l'état des masses d'eau littorales au titre de la Directive Cadre sur l'Eau à La Réunion et à Mayotte.
Tipo: Text
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00684/79629/82352.pdf

Influence of riverine input on the growth of Glycymeris glycymeris in the Bay of Brest, North-West France
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Featherstone, Amy M.; Butler, Paul G.; Peharda, Melita; Chauvaud, Laurent; Thebault, Julien.
A crossdated, replicated, chronology of 114 years (1901-2014) was developed from internal growth increments in the shells of Glycymeris glycymeris samples collected monthly from the Bay of Brest, France. Bivalve sampling was undertaken between 2014 and 2015 using a dredge. In total 401 live specimens and 243 articulated paired valves from dead specimens were collected, of which 38 individuals were used to build the chronology. Chronology strength, assessed as the Expressed Population Signal, was above 0.7 throughout, falling below the generally accepted threshold of 0.85 before 1975 because of reduced sample depth. Significant positive correlations were identified between the shell growth and the annual averages of rainfall (1975-2008; r = 0.34) and inflow...
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00420/53103/61588.pdf

A new genus of soft coral (Cnidaria, Octocorallia) from the Republic of Congo (Pointe-Noire Region)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Van Ofwegen, Leen P.; Aurelle, Didier; Sartoretto, Stephane.
A new genus of soft coral from the Republic of Congo is described, Complexum gen. n. Nine West African octocoral species previously described in the genus Alcyonium by Tixier-Durivault (1955) are referred to this new genus, and a new species is described and figured, C. pusillum sp. n. The new species is characterized by having encrusting growth form and abundant spiny clubs in the surface of the polyparium. It colonizes shallow calcareous rocky banks (5 to 20 m depth) existing in coastal water of the region of Pointe-Noire. Based on molecular phylogeny this new genus is well separated from Alcyonium species.
Tipo: Text
Palavras-chave: Coelenterata; Cnidaria; Octocorallia; Alcyonacea; Alcyoniidea; Alcyonium; Complexum; Republic of Congo; New genus; New species.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00248/35931/34444.pdf

Determining the age of tropical tunas in the Indian Ocean from otolith microstructures
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sardenne, Fany; Dortel, Emmanuelle; Le Croizier, Gael; Million, Julien; Labonne, Maylis; Leroy, Bruno; Bodin, Nathalie; Chassot, Emmanuel.
The Indian Ocean Tuna Tagging Program (IOTTP) provided a unique opportunity to assess the viability of estimating the age of tropical tunas from the micro-structural features of otoliths. Here, we analyzed the length measurements and micro-increment counts collected for 506 sagittal otoliths, of which 343 were chemically marked with oxytetracycline, for bigeye (Thunnus obesus), skipjack (Katsuwonus pelamis), and yellowfin tuna (Thunnus albacares). Our results show that the otoliths of tropical tunas grow more slowly than the rest of the body. Our findings confirm that both yellowfin and juvenile bigeye deposit daily increments in their otoliths, though ages are underestimated for large bigeye (&gt;100 cm) when derived from micro-increment counts. Our...
Tipo: Text
Palavras-chave: Daily age; Micro-increment; Mark-recapture; Oxytetracycline; Thunnus.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00254/36511/35082.pdf

Control factors of Holocene sedimentary infilling in a semi-closed tidal estuarine-like system: the bay of Brest (France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gregoire, Gwendoline; Le Roy, Pascal; Ehrhold, Axel; Jouet, Gwenael; Garlan, Thierry.
This study details the sedimentary infilling of an original tidal-dominated estuary system during the final stage of the last marine transgression. The Bay of Brest is confined and connects the rivers Elorn and Aulne, to the sea of Iroise by a narrow strait encasing a well preserved paleo-channel. The compilation of high- and very-high-resolution bathymetric and seismic data, constrained by sediments datations, allows us to classify the paleo-morphology of the bay into three stepped domains: the paleo-valley floor surrounded by fluvial terraces, the central plateau, and the shallow embayments. Taking into account the main factors controlling the infilling, including sea-level rise, substratum morphology, and hydrodynamics, the stratigraphic scheme of the...
Tipo: Text
Palavras-chave: Tide-dominated estuary; Incised-valley; Holocene infill; Seismic stratigraphy; Estuarine processes; Bay of Brest.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00358/46968/46883.pdf

Larval recruitement of Crassostrea gigas in a french Mediterranean lagoon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lagarde, Franck; Roque D'Orbcastel, Emmanuelle; Perignon, Adeline; Mortreux, Serge; Fuhrmann, Marine; Le Gall, Patrik; Leurion, Axel; Chiantella, Claude; Bec, Beatrice; Roques, Cecile; Bonnet, Delphine; Cochet, Helene; Boj, Marie; Gervasoni, Erika; Miron, Gilles; Fiandrino, Annie; Pouvreau, Stephane; Pernet, Fabrice.
We bring new items in connection with the origins of the natural recruitment variability of the Pacific oyster Crassostrea gigas in Thau lagoon. A poor relationship between " number of larvae" and "number of spat" in 2012 shows a biological lock around oysterculture areas during the metamorphosis in spite of better success of recruitment outside shellfish farming zone. A comprehensive analysis of environmental factors effects and the development of prognosis tools are planned to assist oysterfarmers in rationalization of natural oyster recruitment around Mediterranean lagoon.
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00165/27653/25822.pdf

A semiempirical model of the normalized radar cross-section of the sea surface - 1. Background model
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kudryavtsev, V; Hauser, D; Caudal, G; Chapron, Bertrand.
Multiscale composite models based on the Bragg theory are widely used to study the normalized radar cross-section (NRCS) over the sea surface. However, these models are not able to correctly reproduce the NRCS in all configurations and wind wave conditions. We have developed a physical model that takes into account, not only the Bragg mechanism, but also the non-Bragg scattering mechanism associated with wave breaking. A single model was built to explain on the same physical basis both the background behavior of the NRCS and the wave radar Modulation Transfer Function (MTF) at HH and VV polarization. The NRCS is assumed to be the sum of a Bragg part (two-scale model) and of a non-Bragg part. The description of the sea surface is based on the short wind...
Tipo: Text
Palavras-chave: Ocean surface waves; Radar cross section; Short wind waves; Wave breaking; Bragg scattering; Non Bragg scattering.
Ano: 2003
URL: https://archimer.ifremer.fr/doc/00000/10182/9580.pdf

Antibiofilm Activity of the Marine Bacterium Pseudoalteromonas sp Strain 3J6
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dheilly, Alexandra; Soum-soutera, Emmanuelle; Klein, Geraldine; Bazire, Alexis; Compere, Chantal; Haras, Dominique; Dufour, Aurelie.
Biofilm formation results in medical threats or economic losses and is therefore a major concern in a variety of domains. In two-species biofilms of marine bacteria grown under dynamic conditions, Pseudoalteromonas sp. strain 3J6 formed mixed biofilms with Bacillus sp. strain 4J6 but was largely predominant over Paracoccus sp. strain 4M6 and Vibrio sp. strain D01. The supernatant of Pseudoalteromonas sp. 3J6 liquid culture (SN3J6) was devoid of antibacterial activity against free-living Paracoccus sp. 4M6 and Vibrio sp. D01 cells, but it impaired their ability to grow as single-species biofilms and led to higher percentages of nonviable cells in 48-h biofilms. Antibiofilm molecules of SN3J6 were able to coat the glass surfaces used to grow biofilms and...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00004/11530/11317.pdf

Rapport de la campagne à la mer PELGAS2012
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Doray, Mathieu; Masse, Jacques; Huret, Martin; Doremus, Ghislain; Duhamel, Erwan.
PELGAS2012 sea cruise summary, including a multi-sensor characterisation of the marine particles in the Gironde mouth
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00127/23832/21756.pdf

Etude de l'herpès virus de l'huître - Fonds d'Aide à la Recherche et à l'Innovation - Décision d'Aide à la Recherche n° 95-07-01 - Rapport intermédiaire 1998
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Renault, Tristan.
Le Laboratoire de Génétique, Aquaculture et Pathologie (GAP) de la Station IFREMER de La Tremblade, se propose dans le présent projet d'étudier le virus de type herpès observée chez les huîtres (pouvoir pathogène, conditions d'expression de l'infection, transmission, etc ... ) et de développer des réactifs permettant de réaliser un diagnostic rapide, sensible et fiable de l'infection qu'il occasionne. Les outils de diagnostic développés sont basés sur la détection directe du virus, soit au moyen de réactifs immunologiques spécifiques des antigènes viraux, soit par des techniques de biologie moléculaire permettant de détecter l'ADN viral (hybridation de sondes nucléiques et réaction PCR). Ce projet, proposé sur une durée de trois années (1995-1998),...
Tipo: Text
Palavras-chave: Virus; Pathologie; Herpès virus; Crassostrea gigas; Pathogène; Herpesviridae.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00043/15450/12825.pdf

Evaluation of the bioeconomic sustainability of multi-species multi-fleet fisheries under a wide range of policy options using ISIS-Fish
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pelletier, Dominique; Mahevas, Stephanie; Drouineau, Hilaire; Vermard, Youen; Thebaud, Olivier; Guyader, Olivier; Poussind, Benjamin.
In order to provide reliable scientific advice and support for fisheries management, it is necessary to evaluate the biological and economic sustainability of complex fisheries, such as multi-species multi-fleet fisheries. Existing policy-screening modelling tools are not fully suitable in this purpose due to either an over-simplified description of population dynamics, or due to the lack of consideration of economic aspects. In this paper, we present a package that enables quantitative bioeconomic assessment of management scenarios. Population dynamics is described through spatially- and seasonally-explicit models. Exploitation dynamics is characterized by several fishing activities with specific spatial and seasonal features, and practiced by several...
Tipo: Text
Palavras-chave: Policy screening; Natural resource management; Fisheries dynamics; Bioeconomic model; Population dynamics; Complex systems; Simulation tool.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6782.pdf

ODEMAR Oceanic Detachment Faults at the Mid-Atlantic Ridge. Cruise Report. N/O Pourquoi pas? – ROV Victor 6000 – AUV Abyss 6000. 16 Nov - 19 Dec 2013, Mindelo (Cape Verde) - Point a Pitre (Guadeloupe)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Escartin, Javier.
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00360/47149/47112.pdf

L'oxygène en été dans l'étang de Thau. Contribution à l'étude du risque de "malaïgue". Année 1989
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tournier, H.; Audabram, D.; Landrein, S.; Deslous Paoli, J.m; Juge, Claude.
The mediterranean lagoon of Thau is subject to dystrophic crisis leading to mortalities of the shells grown there. This study shows that the risk for such a crisis is permanent during the Summer. Disappearing of oxygen, mainly tabes place in the breeding areas and near the bottom because of the concentration of shells and the abundance of biodeposit. A correlation is shown between the level of the oxygen in the water and the speed of the wind which is the main factor of balance.
Tipo: Text
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00039/15001/12335.pdf

High-resolution underway measurements of phytoplankton photosynthesis and abundance as an innovative addition to water quality monitoring programs
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Aardema, Hedy M.; Rijkeboer, Machteld; Lefebvre, Alain; Veen, Arnold; Kromkamp, Jacco C.
Marine waters can be highly heterogeneous both on a spatial and temporal scale, yet monitoring programs currently rely primarily on low-resolution methods. This potentially leads to undersampling. This study explores the potential of two high-resolution methods for monitoring phytoplankton dynamics: fast repetition rate fluorometry for information on phytoplankton photosynthesis and productivity and automated scanning flow cytometry for information on phytoplankton abundance and community composition. These methods were tested in combination with an underway Ferrybox system during four cruises on the Dutch North Sea in April, May, June, and August 2017. The high-resolution methods were able to visualize both the spatial and temporal variability of the...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00584/69635/67492.pdf

Effect of winter conditions upon phytoplankton production in North-Western parts of the Mediterranean Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Finenko, Z.
The investigations have been done with the aim of determining the effect of winter conditions upon the spatial distribution of phytoplankton in the areas featured by different convectional mixing.
Tipo: Text
Palavras-chave: MED; Western Mediterranean Geographical distribution Seasonal variations Biomass Vertical distribution Winter Phytoplankton.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-1512.pdf

La conchyliculture en Italie. Mission du 1er au 15 juin 1986. Etude Aquaculture Méditerranée
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Paquotte, Philippe.
HISTORIQUE : L'élevage des mollusques est une activité très ancienne en Italie. Les sites traditionnels de cette activité étaient la Rade de la Spezia, le Lac Fusaro près de Naples, la "Mar Piccolo" de Tarante et la Lagune de Venise (voir figure l).Il s'agissait autant d'ostréiculture (huître plate Ostrea edulis) que de mytiliculture (Mytilus galloprovincialis). Le déclin de l'ostréiculture au profit de la mytiliculture date du début du siècle et s'est accentué après la seconde guerre mondiale. En dehors de quelques opérations d'affinage ou de retrempage, on peut considérer que l'ostréiculture est une activité abandonnée en Italie et la production d'huîtres provient exclusivement de la pêche sur des bancs naturels (huître plate Ostrea edulis et huître...
Tipo: Text
Ano: 1986
URL: http://archimer.ifremer.fr/doc/00058/16950/14437.pdf

Etude des bactéries d'origine entérique dans les sédiments marins
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Mercier, Marie-laure.
Les rejets des microorganismes d'origine humaine ou animale en eau de mer constituent un problème tant sanitaire qu'économique. L'homme peut, en effet, se contaminer lors de baignades ou de consommations de coquillage. Les bactéries entériques rejetées en mer se retrouvent dans un milieu qui leur est défavorable (lumière, salinité ... ) mais où elles peuvent néanmoins survivre. Le sédiment marin protège les bactéries entériques de toutes ces agressions marines et, de ce fait, constitue un véritable réservoir naturel de bactéries entériques et de bactéries pathogènes pour l'homme comme par exemple le genre Clostridium. Pour survivre dans les sédiments, les bactéries se lient aux particules sédimentaires et peuvent ainsi accéder aux matières organiques et se...
Tipo: Text
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00444/55525/57113.pdf

Geochemical portray of the Pacific Ridge: New isotopic data and statistical techniques
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hamelin, Cedric; Dosso, Laure; Hanan, Barry B.; Moreira, Manuel; Kositsky, Andrew P.; Thomas, Marion Y.
Samples collected during the PACANTARCTIC 2 cruise fill a sampling gap from 53 degrees to 41 degrees S along the Pacific Antarctic Ridge (PAR). Analysis of Sr, Nd, Pb, Hf, and He isotope compositions of these new samples is shown together with published data from 66 degrees S to 53 degrees S and from the EPR. The recent advance in analytical mass spectrometry techniques generates a spectacular increase in the number of multidimensional isotopic data for oceanic basalts. Working with such multidimensional datasets generates a new approach for the data interpretation, preferably based on statistical analysis techniques. Principal Component Analysis (PCA) is a powerful mathematical tool to study this type of datasets. The purpose of PCA is to reduce the...
Tipo: Text
Palavras-chave: Oceanic basalts; Pacific-Antarctic Ridge; Mantle heterogeneity; Principal Component Analysis; Sr Nd Pb Hf isotopes.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00031/14197/11508.pdf

Short-scale temporal variability of physical, biological and biogeochemical processes in the NW Mediterranean Sea: an introduction
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Andersen, V.; Goutx, M.; Prieur, L.; Dolan, J. R.
In the framework of the PROOF-PECHE project (http://www.obs-vlfr.fr/proof/vt/op/ec/peche/pec.htm) a multi-disciplinary team performed experiments and collected samples during the DYNAPROC2 cruise aboard the RV Thalassa from September to October in 2004. The cruise provided data on the functioning of the pelagic food web by sampling over a month long period in the NW Mediterranean Sea at a fixed station subject to weak horizontal advection currents during a period of hydrological stability. This paper describes the background of the cruise and provides an overview of the results derived from the campaign which constitute the special section. The major objective of the cruise was to assess the relative importance and variability of the pathways of carbon in...
Tipo: Text
Palavras-chave: Spring bloom; Zooplankton community; Vertical distribution; Surface layer; Wind events; Bacterial communities; Food web; Transition; Oligotrophy; Abundance.
Ano: 2009
URL: https://archimer.ifremer.fr/doc/00092/20315/17954.pdf

A post Younger Dryas Black Sea regression identified from sequence stratigraphy correlated to core analysis and dating
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lericolais, Gilles; Guichard, F.; Morigi, C.; Minereau, Amelie; Popescu, Irina; Radan, S.
The north-western Black Sea shelf is the widest continental shelf of the Black Sea, where the Danube delta/prodelta system includes important records on the Black Sea water level fluctuations. This study integrates newly acquired high-resolution single channel seismic reflection profiles and Calypso piston cores recovered along a transect extending from the Danube delta deep into its deep sea fan. The correlated results provide information on the Late Quaternary architecture of the Danube Black Sea shelf and on the role of global glacio-eustatic fluctuations on the building of the Danube delta/prodelta. The sedimentary sequences in the Black Sea are strongly affected by water level changes. For the whole duration of Late Glacial-Holocene period, the level...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00015/12637/9635.pdf

Impact of hydrolytic degradation on mechanical properties of PET - Towards an understanding of microplastics formation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Arhant, Mael; Le Gall, Maelenn; Le Gac, Pierre Yves; Davies, Peter.
Ocean pollution by microplastics, i.e. small pieces of plastic of less than 5 mm, is one of the major concerns for the future of our planet. Secondary microplastics formation is due to fragmentation of macroplastic waste. This fragmentation can be attributed to environmental loadings such as waves, winds and tides, coupled with a change in mechanical properties of polymers induced by UV and seawater ageing. This study aims to characterize and understand changes in the mechanical behaviour of Polyethylene Terephthalate (PET) induced by hydrolysis, especially for high degradation levels. Thin films (200 microns) of PET were aged in water at temperatures from 110 °C to 80 °C for up to 150 days. Embrittlement occurs with chain scission during hydrolysis when...
Tipo: Text
Palavras-chave: Hydrolysis; Polyethylene terephthalate; Mechanical properties; Molar mass; Embrittlement; Microplastics.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00476/58794/61331.pdf

A mussel (Mytilus edulis) tissue certified reference material for the marine biotoxins azaspiracids
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mccarron, Pearse; Giddings, Sabrina D.; Reeves, Kelley L.; Hess, Philipp; Quilliam, Michael A.
Azaspiracids (AZAs) are lipophilic biotoxins produced by marine algae that can contaminate shellfish and cause human illness. The European Union (EU) regulates the level of AZAs in shellfish destined for the commercial market, with liquid chromatography-mass spectrometry (LC-MS) being used as the official reference method for regulatory analysis. Certified reference materials (CRMs) are essential tools for the development, validation, and quality control of LC-MS methods. This paper describes the work that went into the planning, preparation, characterization, and certification of CRM-AZA-Mus, a tissue matrix CRM, which was prepared as a wet homogenate from mussels (Mytilus edulis) naturally contaminated with AZAs. The homogeneity and stability of...
Tipo: Text
Palavras-chave: Azaspiracids; Seafood safety; Matrix certified reference material; Liquid chromatography-mass spectrometry; Matrix effects.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00320/43138/42761.pdf

Optimisation d'un nouveau procédé de fumage du poisson par précipitation électrostatique des particules de fumée
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Baron, Regis; Sanquer, Odile; Département Sciences et Techniques Alimentaires Marines de l'IFREMER de Nantes; UMR CNRS GEPEA; CETIM; UMR LEA Univ. Poitiers.
Cette étude porte sur l'optimisation d'un nouveau procédé de fumage en continu par précipitation électrostatique des particules de fumée. Le principe est de faire circuler Ia fumée, produite par pyrolyse de bois, entre deux électrodes. Sous des conditions électriques spécifiques, un flux ionique entre les électrodes est généré.
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00065/17626/15155.pdf

RNO. Surveillance du Milieu Marin. Travaux du Réseau National d'Observation de la qualité du milieu marin. Edition 2002
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer.
Tipo: Text
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00314/42567/41937.pdf

Penaeid reared brood stock : closing the cycle
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: AQUACOP.
Three shrimp species, Penaeus monodon, P. stylirostris (Panama and Mexican strains) and P. vannamei have matured and spawned in captivity at the Centre Océanologique du Pacifique (COP) laboratory. The shrimp, originally stocked as juveniles or postlarvae, were reared to adult size in tanks and ponds and have completed the cycle: F3 generation for P. monodon, F2 for P. stylirostris (Panama strain) and P. vannamei and F1 for P. stylirostris (Mexican strain). Maturation occurs naturally under our rearing conditions or is induced by unilateral eyestalk ablation. Details are given on mating behavior, ovarian development, number of spawnings, egg viability and maintenance of captive brood stock. Partial results so far obtained for P. monodon and P. stylirostris...
Tipo: Text
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/acte-4423.pdf

Vertical distribution of pico- and nano-sized Dapi yellow particles at Dyfamed time-series station, NW Mediterranean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tanaka, T; Rassoulzadegan, F.
We measured. abundance and surface area of pico- and nano-sized organic particles that are stained by 4'6-diamidino-2-phenylindole (Dapi), namely Dapi yellow particles. This study was done monthly from April 1999 to March 2000 from surface down to 2000 m at the French-JGOFS time-series station Dyfamed in the NW Mediterranean. Dapi yellow particles were always observed throughout the water column and the total surface area of Dapi yellow particles 0.2-10 mum ranged from 0.5 to 51.5 mm(2) l(-1). Dapi yellow particles were generally less abundant in the surface layer, greater between 70 and 500 m and decreased toward 2000 m. During the mixing period, Dapi yellow particles were homogeneous throughout the upper 200 m, suggesting that distribution of Dapi yellow...
Tipo: Text
Palavras-chave: Dapi yellow particles; Matériel organique; Détritus; Méditerranée occidentale; Dapi yellow particles; Organic materials; Detritus; Mediterranean Sea.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00322/43278/43010.pdf

Combined effects of dietary HUFA level and temperature on sea bass (Dicentrarchus labrax) larvae development
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vagner, Marie; Robin, Jean; Zambonino, Jose-luis; Person, Jeannine.
The purpose of this study was to investigate the combined effect of the incorporation of vegetable products in diet and temperature on enzymatic pathways for high unsaturated fatty acids (HUFA) desaturation in sea bass larvae. Four replicated groups were fed a low (LH; 0.8% EPA+DHA) or a high (HH; 2.2% EPA+DHA) n-3 HUFA microparticulated diet from mouth opening, six days post-hatching and were reared at 16 or 22 degrees C. The four experimental conditions (LH16, HH16, LH22 and HH22) were tested for 45 days. At the end of the experiment, body weight, total length and biomass were affected by temperature (P&lt;0.001), while biomass as well as fresh body weight was also influenced by diet (P&lt;0.05 and P&lt;0.001 respectively). This always lead to the same...
Tipo: Text
Palavras-chave: Desaturation; HUFA; Dicentrarchus labrax; Delta 6 desaturase; Aquaculture.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2673.pdf

SELEDRAG : Etude comparative de la sélectivité des dragues à coquilles Saint-Jacques Pecten maximus
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Foucher, Eric; Quinquis, Jerome; Ton, Caroline.
The SELEDRAG project was conducted in French territorial waters in May 2019. It was a short project, lead by the CNPMEM (French National Committee for Marine Fisheries), with Ifremer as scientific partner, and funded by “France Filière Pêche”. The context of the project is the French King Scallop fishery in the Eastern Channel, where 720 fishing boats are directly concerned by this species. Despite its importance, there is very little management for this species at the European level, but several binding rules for French fishermen in order to protect the stock, are not applicable to other countries. One of the French specificity is the ring size used, 92mm for all Scallop fisheries in France vs 85mm (or less) for UK fisheries. Another sharp divergence is...
Tipo: Text
Palavras-chave: Coquille Saint-Jacques; Pecten maximus; Manche Est; Baie de Seine; Sélectivité des dragues; Coquille Saint-Jacques; Pecten maximus; Manche Est; Baie de Seine; Sélectivité des dragues.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00614/72596/71590.pdf

Une machine à dégrapper, trier, laver, et ensacher les moules
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Peslerbe, R.
Depuis quelques années, le problème de la mécanisation en mytiliculture se pose.  Deux facteurs semblent avoir motivé cette évolution technique.  1°) Le coût élevé de la main d'oeuvre en regard de la nécessité d'offrir au marché des produits à prix aussi bas que possible.  2°) La nécessité de livrer à la consommation une marchandise de qualité.  Plusieurs types d'appareils destinés au dégrappage et au triage des moules ont vu le jour. Quelques uns donnèrent des résultats intéressants, mais la plupart, faute d'avoir été conçus par des "mécaniciens" ne purent rendre d'une manière satisfaisante les services qu'on en attendait.  Les appareils que nous présentons aujourd'hui sont le fruit de la collaboration d'un technicien et de professionnels. Tous les...
Tipo: Text
Ano: 1957
URL: http://archimer.ifremer.fr/doc/1957/publication-7220.pdf

Evolution de Caulerpa taxifolia devant les côtes des Alpes Maritimes et la Principauté de Monanco - Observations par vidéo-tractée (mars et octobre 1992)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Belsher, Thomas; Youenou, Gilles; Dimeet, Joel; Raillard, Jean-michel; Bertrand, Sophie; Mereau, N.
Deux campagnes océanographiques, menées à partir du N.O. "Roselys 2", au cours de l'année 1992, ont permis d'établir la cartographie de l'algue Caulerpa taxifolia pour plusieurs secteurs des côtes des Alpes Maritimes et de la Principauté de Monaco. Des survols, effectués à bord de l'hélicoptère des Douanes, ont précédé chacune de ces campagnes. L'expansion rapide de l'algue, ses capacités de fixation à grande profondeur, ainsi que d'importantes variations saisonnières ont pu ainsi être mises en évidence.
Tipo: Text
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00104/21561/19141.pdf

Stygofaunal community trends along varied rainfall conditions: Deciphering ecological niche dynamics of a shallow calcrete in Western Australia
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Saccò, Mattia; Blyth, Alison J.; Humphreys, William F.; Karasiewicz, Stephane; Meredith, Karina T.; Laini, Alex; Cooper, Steven J.b.; Bateman, Philip W.; Grice, Kliti.
Groundwaters host highly adapted fauna, known as stygofauna, which play a key role in maintaining the functional integrity of subterranean ecosystems. Stygofaunal niche studies provide insights into the ecological dynamics shaping the delicate balance between the hydrological conditions and community diversity patterns. This work aims to unravel the ecological trends of a calcrete stygofaunal community, with special focus on niche dynamics through the Outlying Mean Index analysis (OMI) and additional calculation of Within Outlying Mean Indexes (WitOMI), under three rainfall regimes. Temperature and pH changed significantly among different rainfall conditions (P &lt; .001), and together with salinity were the most influential drivers in shaping stygofaunal...
Tipo: Text
Palavras-chave: Stygofauna; Ecological niche; Groundwater; Calcrete; Rainfall; WitOMI.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00599/71110/69806.pdf

Rapport de la campagne de la "THALASSA" en manche orientale
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Heral, Maurice; Lassus, Patrick; Halguand, D.
Le navire océanographique "Thalassa" a effectué du 15 janvier au 14 février 1975 une série de prélèvements et de mesures, dans le secteur côtier compris entre le cap d'Antifer et Dunkerque.   La mission embarquée comprenait les chercheurs et techniciens de l'ISTPM, ainsi qu'un représentant d'EDF pendant la première semaine de campagne.   Ces travaux avaient pour but essentiel d'apporter des informations préliminaires à des études biologiques et écologiques destinées à évaluer l'impact de futures centrales thermiques nucléaires sur l'environnement marin de la Manche orientale et du sud de la Mer du Nord.
Tipo: Text
Ano: 1975
URL: http://archimer.ifremer.fr/doc/00046/15728/13130.pdf

Filet encerclant à Coulirous. Guadeloupe. 2018. Observation des Marées au débarquement - OBSDEB.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: IFREMER. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public. Ces indicateurs intègrent...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00492/60329/63754.pdf

Does the nutrient enrichment of the equatorial upwelling influence the size structure of phytoplankton in the Atlantic Ocean?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Herbland, Alain; Le Bouteiller, A; Raimbault, P.
A study of the size structure of chlorophyll a (Chla) covering the major part of the equatorial Atlantic Ocean from 5 degree N to 5 degree S leads to the conclusion that seasonal nutrient enrichment in the open eastern equatorial Atlantic does not drastically affect the size distribution of the primary producers: 90% of the total Chla is everywhere contained in the &lt; 20 mu m fraction on the average. In the coastal upwelling near Dakar, this percentage is less than 60%, for the same range of chla concentrations. In the equatorial region the percentage of &lt; 1 mu m Chla is the same in the deep chlorophyll maximum located at the top of the nitracline during the warm season and in the subsuperficial maximum of the upwelling.
Tipo: Text
Ano: 1987
URL: http://archimer.ifremer.fr/doc/00267/37855/35936.pdf

Strong Site Effect Revealed by a New Broadband Seismometer on the Continental Shelf Offshore Nice Airport (Southeastern France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Courboulex, Francoise; Mercerat, E. Diego; Deschamps, Anne; Migeon, Sebastien; Baques, Marion; Larroque, Christophe; Rivet, Diane; Hello, Yann.
A broadband seismological station (PRIMA) installed offshore Nice airport (southeastern France) reveals a strong amplification effect of seismic waves. PRIMA station was in operation for 2 years (9/2016 to 10/2018) on the outer shelf at a water depth of 18 m. Situated at the mouth of the Var River, this zone is unstable and prone to landslides. A catastrophic landslide and tsunami already occurred in 1979, causing 10 casualties. Given the level of seismicity of the area, it is important to infer the impact of an earthquake on this zone. We analyze the recordings of earthquakes and seismic noise at the PRIMA station by comparing them to nearby inland stations. We find that the seismic waves are strongly amplified at PRIMA at some specific frequencies (with...
Tipo: Text
Palavras-chave: Earthquakes; Site effects; Landslides; Offshore seismometer; Seismic hazard.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00659/77081/78405.pdf

Simultaneous measurement of mitochondrial respiration and ATP production in tissue homogenates and calculation of effective P/O ratios
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Salin, Karine; Villasevil, Eugenia M.; Auer, Sonya K.; Anderson, Graeme J.; Selman, Colin; Metcalfe, Neil B.; Chinopoulos, Christos.
The use of tissue homogenate has greatly aided the study of the functioning of mitochondria. However, the amount of ATP produced per oxygen molecule consumed, that is, the effective P/O ratio, has never been measured directly in tissue homogenate. Here we combine and refine existing methods previously used in permeabilized cells and isolated mitochondria to simultaneously measure mitochondrial ATP production (JATP) and oxygen consumption (JO(2)) in tissue homogenate. A major improvement over existing methods is in the control of ATPases that otherwise interfere with the ATP assay: our modified technique facilitates simultaneous measurement of the rates of uncorrected ATP synthesis and of ATP hydrolysis, thus minimizing the amount of tissue and time needed....
Tipo: Text
Palavras-chave: ATPase; Fluorescence; Magnesium green; Oxidative phosphorylation; Oxygraph.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00414/52500/53300.pdf

Le maximum saisonnier de Dynophysis cf acuminata à Antifer (Normandie, France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lassus, Patrick; Maggi, Pierre; Proniewski, F.; Truquet, Philippe; Bardouil, Michele.
Since 1987 Antifer oil tanker terminal (Normandy, France) was weIl known, as a preferential area for summer highest blooms of Dinophysis cf acuminata, a toxic dinoflagellate. Three oceanographic cruises were made in August 1989, before, in the course of and after the seasonal max. of this species. Results obtained from these cruises (hydrological parameters and phytoplankton) as weIl as from a daily survey at a reference station in Antifer harbour, corrobora te the prevailing role of coastal up flowing of Seine estuarine waters, pushed to the coast by a dominant S - SW wind, on intensity and duration of Dinophysis bloom. Such observations are in agreement with those of Summer 1987 at reference station.
Tipo: Text
Palavras-chave: Antifer; Dinophysis; Hydrologie; Phytoplancton; Antifer; Dinophysis; Hydrology; Phytoplankton.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00138/24946/23039.pdf

La morue de la mer celtique et de l'entrée de la Manche
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Letaconnoux, Robert.
Tipo: Text
Ano: 1954
URL: http://archimer.ifremer.fr/doc/00415/52623/53462.pdf

Etude sanitaire de la zone 22.02.10 – Baie de la Fresnaie Groupe III. Rapport d’étude. Département des Côtes d’Armor
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cheve, Julien; Le Noc, Sandrine.
Ce rapport final présente l’évaluation de la qualité microbiologique et chimique de la zone 22.02.10 (baie de la Fresnaie) pour le groupe III en vue de sa sectorisation. L’étude s’est déroulée entre novembre 2015 et février 2017, avec l’obtention de 48 résultats microbiologiques (dénombrement des E. coli dans 100 g de CLI) en deux points : « Fresnaie f3 - 023-P- 004 » et « Fresnaie f4 - 023-P-005 » et la recherche de molécules chimiques (Pb, Hg, Cd, par kg de chair humide), au point « Baie de la Fresnaie - 023-P-014 ». Les résultats du suivi sanitaire ont confirmé les conclusions de l’étude de dossier et des anciennes données REMI. Il existe une différence de contamination entre les secteurs Est et Ouest de la zone de production conchylicole en baie de la...
Tipo: Text
Palavras-chave: Etude sanitaire; E. coli; Contamination bactériologique des coquillages; Contaminants chimiques; Milieu marin; Qualité microbiologique et chimique des zones de production; Département 22; Côtes d’Armor; Baie de la Fresnaie; Groupe III.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00375/48586/48909.pdf

Observer les coccolithophores de l'espace
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Perrot, Laurie.
Coccoliths, in cells or detached, from coccolithophores are calcite plates with highly backscattering signal.Coccolithophore blooms are visible from space and are currently quantified by Calcite algorithm fromNASA applied to Ocean Color data. Coccoliths impact also the Suspended Particulate Matters (SPM) product from Ifremer, well established in the Northwest european continental shelf. Although these algorithms are independent, they are based on the same basic concepts, but Ifremer algorithm is more adaptable and allows to link up with other particles than coccoliths, as the resuspended matters or aggregates.Coccolithophore blooms identification over 18 years, from bay of Biscay to South Irelands has been established by a spectral method, allowing to...
Tipo: Text
Palavras-chave: Matières en suspension; Télédétection; Golfe de Gascogne; Coccolithophores; Blooms; Suspended Particulate Matters; Remote-sensing; Bay of Biscay.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00497/60914/64269.pdf

Flottille des caseyeurs, Métiers de l'hameçon. Façade Mer du Nord - Manche. 2018. Synthèse des flottilles de pêche.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d’Informations Halieutiques » (SIH) de l’Ifremer, qui constitue le réseau d’observation des ressources halieutiques et des usages associés. Ce projet s’inscrit dans la mission de service d’intérêt public de l’Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l’analyse du secteur des pêches, le SIH a en charge l’élaboration d’indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche et du grand public.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00613/72500/71462.pdf

Aquatic Eddy Correlation: Quantifying the Artificial Flux Caused by Stirring-Sensitive O2 Sensors.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Holtappels, Moritz; Noss, Christian; Hancke, Kasper; Cathalot, Cecile; Mcginnis, Daniel F.; Lorke, Andreas; Glud, Ronnie N.
In the last decade, the aquatic eddy correlation (EC) technique has proven to be a powerful approach for non-invasive measurements of oxygen fluxes across the sediment water interface. Fundamental to the EC approach is the correlation of turbulent velocity and oxygen concentration fluctuations measured with high frequencies in the same sampling volume. Oxygen concentrations are commonly measured with fast responding electrochemical microsensors. However, due to their own oxygen consumption, electrochemical microsensors are sensitive to changes of the diffusive boundary layer surrounding the probe and thus to changes in the ambient flow velocity. The so-called stirring sensitivity of microsensors constitutes an inherent correlation of flow velocity and...
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00275/38575/37100.pdf

Mise au point et modélisation de l'irradiation dans un photobioréacteur torique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hamel, Guillaume.
Dans le cadre de la formation universitaire de 3ème année à l'IUP de Chimie-Biologie de Nantes, option Génie des Procédés, ce stage de 6 mois au sein de la DRV/VP/PBA du centre IFREMER de Nantes a porté sur la mise au point d'un photobioréacteur torique de laboratoire . L'étude qui m'a été confiée a consisté: 1) A concevoir les différents périphériques du photobioréacteur. 2) A réaliser un modèle de distribution de l'irradiance au sein du photobioréacteur.
Tipo: Text
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00304/41521/40729.pdf

Rainfall chemistry: long range transport versus below cloud scavenging. A two-year study at an inland station (Opme, France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bertrand, Guillaume; Celle-jeanton, Helene; Laj, Paolo; Rangognio, Jerome; Chazot, Gilles.
The present study investigates the chemical composition of wet atmospheric precipitation samples on a daily and an intra-event timescales in Opme, an experimental meteorological station located near Clermont-Ferrand, France. The samples have been collected from November 2005 to October 2007. A total of 217 rainwater samples, integrated for 24 h, were collected and analyzed for pH, conductivity, Na+, K+, Mg2+, NH4 (+) , Ca2+, Cl-, NO (3) (-) , SO (4) (2-) , PO (4) (3-) and HCO3 (-) . The composition of the rainwater collected appeared to be controlled by the following potential sources: neutralisation process (association among calcium, ammonium with nitrate and sulphate), marine and terrestrial sources. In order to determine the role of long-range...
Tipo: Text
Palavras-chave: France; Chemistry; Air mass back trajectories; Sequential sampling; Major ions; Rainwater.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-6390.pdf

Machine Learning applied to Argo floats temperature and salinity Delayed-Mode Quality Control (Core-Argo DMQC)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Guen, Robin.
This document is the synthesis of a study to apply Machine Learning to Argo floats temperature and salinity Delayed Mode Quality Control (Core-Argo-DMQC). There already exist numerous DMQC tests. Most of the times they are specific to a particular type of problem with an Argo profile or an Argo measure. For example, there are tests to detect drifts, other tests to detect spikes, others for thermal lags and so on … To get a clean database, all the alerts generated by those tests sum up and analysts need to study the corresponding profiles. The aim of our study is to try to use Machine Learning to detect any kind of problem with Argo profiles and reduce the amount of time and work for the analysts. The model can be upgraded in many ways but it already gets...
Tipo: Text
Palavras-chave: Argo; Argo.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00632/74394/74090.pdf

Demande d'expérimentation sur la zone de dépôts et réserves de Cancale Le Hock
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gerla, Daniel; Cheve, Julien; Rollet, Claire.
Tipo: Text
Palavras-chave: Conchyliculture; Expérimentation; Cancale.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00310/42149/79486.pdf

Polymorphism at the ITS and NTS Loci of Perkinsus marinus isolated from cultivated oyster Crassostrea corteziensis in Nayarit, Mexico and Phylogentic relationship to P. marinus along the Atlantic Coast
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Escobedo-fregoso, C.; Arzul, Isabelle; Carrasco, Noelia; Gutierrez-rivera, J. N.; Llera-herrera, Raul; Vazquez-juarez, R.
Prevalence of the protozoan Perkinsus spp. in the gills of the pleasure oyster Crassostrea corteziensis from two estuaries in Nayarit, Mexico, was measured. The protozoan was identified by PCR amplification of the internal transcribed spacer (ITS) region of the rDNA of Perkinsus spp. The pathogen was found in 92% of oysters from Boca de Camichín and 77% of oysters from Pozo Chino. ITS sequences characterized from C. corteziensis showed 96–100% similarity to Perkinsus marinus. The most frequent ITS sequence, (GenBank JQ266236) had 100% identity with the ITS locus of P. marinus from New Jersey, Maryland, South Carolina, and Texas, and the second most frequent observed sequence (GenBank JQ266240) was 100% identical to ITS sequences of P. marinus from New...
Tipo: Text
Palavras-chave: Crassostrea corteziensis; Perkinsus marinus; Internal transcribed spacer; Non-internal transcribed spacer; Aquatic disease.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00137/24811/22892.pdf

Use comparative proteomics on a selected microalgae provides candidates for biofuel production.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Garnier, Matthieu; Carrier, Gregory; Rogniaux, Helene; Nicolau, Elodie; Bougaran, Gael; Saint-jean, Bruno; Cadoret, Jean-paul.
Microalgae are photosynthetic microorganisms that have an extraordinary diversity which biotechnological potential is just beginning to be explored. Microalgae in biotechnology are presently the focus of an unprecedented surge in interest and investment worldwide. Understanding microalgal lipid accumulation under nitrogen starvation is of major interest for feedstocks, food and biofuel production. Although studies have been performed in model species, to this day it is critical to understand through particular mechanisms of biotechnological species. Tisochrysis lutea is traditionally used for aquaculture feed and presents advantages for lipid production. The wild type strain and a lipid over-accumulating selected mutant were used to perform the first...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00176/28735/27203.pdf

Sediment O-2 demand, density and biomass of the benthos and phytopigments along the northwestern Adriatic coast: The extent of Po enrichment
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tahey, Tm; Duineveld, Gca; Dewilde, Pawj; Berghuis, Em; Kok, A.
Sediment oxygen demand (SOD), silicate and ammonia fluxes, benthic macro- and meiofauna and phytopigments were measured during two cruises in March 1992 and August 1993 in the northwestern Adriatic Sea. Nine, mostly shallow (&lt; 50 m) stations, on a transect stretching from the Po mouth southwards, were visited. Two major issues were addressed: (1) To what extent does the river Po affect the benthic communities along this transect ? and (2) Is there any indication of an eutrophic situation as described in earlier studies ? The spatial patterns of SOD (range +/- 100 to 1450 mu mol O-2 . m(-2). h(-1)) and benthic fauna do not provide evidence for a simple latitudinal decrease in organic enrichment from the Po to the south. However, northern stations...
Tipo: Text
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00093/20473/18143.pdf

Toward Detection of Harmful Algae Blooms by in situ Surface Plasmon Resonance Spectroscopy
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Laurent, Sebastien; Colas, Florent; Hamelin, Muriel; Crassous, Marie-pierre; Antoine, Elisabeth; Lehaitre, Michel; Compere, Chantal.
Among marine algae species, Alexandrium minutum produces a phycotoxin called paralytic shellfish poisoning (PSP) that is introduced in the food chain through the ingestion of phytoplankton by shellfishs, and later by human consumers. Thus, in situ monitoring of A. minutum proliferation in coastal seawater is of great economical importance for marine resources exploitation. Here, we propose a rapid test for the detection of A. minutum by surface plasmon resonance spectroscopy. First, whole genomic DNA is extracted from the algae. Second, a 677 bp long portion of the 28S ribosomal DNA is amplified by PCR. Third, the PCR product is detected by surface plasmon resonance spectroscopy onto a DNA functionalized gold substrate.
Tipo: Text
Palavras-chave: PCR; Algal detection; In situ; Spectroscopy; Surface plasmon resonance.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6830.pdf

Assessing the impact of different management options using ISIS-Fish*: the French Merluccius merluccius Nephrops norvegicus mixed fishery of the Bay of Biscay
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Drouineau, Hilaire; Mahevas, Stephanie; Pelletier, Dominique; Beliaeff, Benoit.
In this paper, we present an approach to compare the impact of different management options oil the dynamics of a mixed fishery. We used ISIS-Fish, a simulation tool aimed at evaluating the impact of spatial and seasonal management measures on the dynamics of mixed fisheries. The French Nephrops norvegicus (Norway lobster) Merluccius merluccius (hake) mixed fishery of the Bay of Biscay was chosen as a Study case. First, we parameterised the Population and exploitation models. We then selected several management measures, including marine protected fishermen's reaction to each measure. Then, a sensitivity analysis (MPAs) and total allowable catches (TAC), and parameterised fish sensitivity analysis was performed according to a fractional factorial...
Tipo: Text
Palavras-chave: Simulation design; Sensitivity analysis; Management measures; Spatial model; Fisheries dynamics.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1340.pdf

Note sur le reparcage des huîtres importées du Portugal en 1955
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ladouce, Rémy; Le Goff,.
Des échantillons des gryphées du Portugal ont été prélevés en Avril-Mai 1955, par les inspecteurs côtiers, au cours de chaque arrivage. Il ont été analysés au laboratoire central de l'Institut des Pêches, pour dosage du cuivre. Nous donnons ci-dessus le tableau récapitulatif des résultats de ces analyses.
Tipo: Text
Palavras-chave: Huître; Grypheae; Dosage cuivre; Croissance; Chambrage; Importation.
Ano: 1956
URL: http://archimer.ifremer.fr/doc/00004/11478/8037.pdf

Chlorophyll a might structure a community of potentially pathogenic culturable Vibrionaceae. Insights from a one-year study of water and mussels surveyed on the French Atlantic coast
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Deter, Julie; Lozach, Solen; Derrien, Annick; Veron, Antoine; Chollet, Jaufrey; Hervio-heath, Dominique.
The present study focused on the isolation of culturable bacteria from mussels and sea water to identify Vibrionaceae potentially pathogenic for humans. Three sites located on the French Atlantic coast were monitored monthly (twice each month during summer) for 1 year. Environmental parameters were surveyed (water temperature, salinity, turbidity, chlorophyll a) and bacteria were detected by culture and identified by API 20E(R) systems (BioMerieux) and PCR. A total of seven species were detected (Grimontia hollisae, Photobacterium damselae, Vibrio alginolyticus, V. cholerae, V. fluvialis, V. vulnificus and V. parahaemolyticus) and species diversity was higher at the end of summer. Surprisingly, V. cholerae non-O1/non-O139 was detected in spring. No site...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00008/11928/8636.pdf

Rearing effect of biofloc on antioxidant and antimicrobial transcriptional response in Litopenaeus stylirostris shrimp facing an experimental sub-lethal hydrogen peroxide stress
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cardona, Emilie; Saulnier, Denis; Lorgeoux, Benedicte; Chim, Liet; Gueguen, Yannick.
This study compares the antioxidant and antimicrobial transcriptional expression of blue shrimps reared according to two different systems, BioFloc Technology (BFT) and Clear sea Water (CW) and their differential responses when facing an experimental sublethal hydrogen peroxide stress. After 30 days of rearing, juvenile shrimps were exposed to H2O2 stress at a concentration of 30 ppm during 6 hours. The oxidative stress caused by H2O2 was examined in the digestive glands of the shrimp, in which antioxidant enzyme (AOE) and antimicrobial peptide (AMP) gene expression were analysed by quantitative real-time PCR. Results showed that rearing conditions did not affect the expression of genes encoding AOEs or AMPs. However, H2O2 stress induced a differential...
Tipo: Text
Palavras-chave: Biofloc; Shrimps; Antimicrobial peptides; Antioxidant enzymes.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00270/38116/36269.pdf

Accretion, Underplating, Subduction and Tectonic Evolution, Middle America Trench, Southern Mexico: Results From DSDP Leg 66
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Watkins, J S; Moore, J C; Shipley, Th; Bachman, S B; Beghtel, F W; Butt, A; Didyk, B M; Leggett, Jk; Lundberg, N; Mcmillen, Kj; Niitsuma, N; Shepherd, Le; Stephan, Jf; Stradner, H.
During Leg 66 eight sites were drilled to form a transect across the Middle America Trench off southwestern Mexico. Cores from these sites show that accretion began approximately 10 MY ago and has continued to the present. Accretion began with offscraping followed by a 2- to 4- MY episode of folding and faulting with uplift rates of 400-500 m/MY; uplift then slowed to 100-200 m/MY, and seismically resolved deformation ceased as the wedge appeared to rise evenly. Approximately 33% of the sediment flux input into the subduction zone, mainly trench sand and slump deposits, is scraped off and incorporated into the toe of the lower slope; an additional 33% is initially subducted but then peeled off to underplate the accretionary wedge; the remaining 33% is...
Tipo: Text
Ano: 1981
URL: http://archimer.ifremer.fr/doc/00245/35668/34176.pdf

Effect of age and environment on the summer mortality in cupped oyster Crassostrea gigas during the first two years
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Degremont, Lionel; Boudry, Pierre; Soletchnik, Patrick; Bedier, Edouard; Ropert, Michel; Samain, Jean-francois.
Three successive generations were produced between 2001 and 2003 to assess to what extent genetic variability exists for this trait in juvenile oysters Crassostrea gigas.  For each generation, two groups were selected for their high ("R" for resistant) and low ("S" for susceptible) survival.  Significant differences of mortality were observed during the first year in Rivière d'Auray (RA) (Brittany-France).  However, low and similar mortality were observed for both groups, with no significant difference between groups in the first and second generation in this site, where the first summer is the critical sensitive period with a clear age effect.  In Baie des Veys (BDV) (Normandie-France), where mortalities usually mainly affect adults, mortality between...
Tipo: Text
Palavras-chave: Genetic variability; Genetic; Summer mortality; Crassostrea gigas; Pacific oysters.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/acte-3442.pdf

Etude comptable et financière d'un projet d'élevage intégré de coquilles Saint-Jacques
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Normand, Ludovic; Quatreboeufs, Frédéric.
King scallop culture is a shellfish farming activity that has now reached a turning point that will determine its future. After many experimental trials, public funds are to be relayed by private funds. This transition requires a technical and economic analysis of king scallop culture. This study is a global approach to production costs through a project that involves all the players in king scallop culture. After presenting the basics of king scallop farming, we will detail the project and its forecasted ten-year budget. The financial analysis, as well as the subsequent sensitivity analysis, will help better determine the profitability of this activity and its feasibility. In our conclusion, although the study was limited in scope, we attempt to extend...
Tipo: Text
Palavras-chave: SEM.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/rapport-4214.pdf

Compréhension des différences de distribution spatiale des anchois et de leurs œufs
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Godet, Claire.
La campagne PELGAS participe à la gestion du stock d’anchois du Golfe de Gascogne, en réalisant une évaluation directe à la mer de la biomasse d’anchois. Pour déterminer la biomasse totale, des appareils acoustiques envoyant des ultra-sons dans l’eau pour détecter les bancs de poisson sont utilisés. Ensuite des pêches sont effectuées sur les zones détectées pour déterminer la composition des bancs (espèces, poids, longueurs…). En parallèle, les oeufs d’anchois sont comptés. A partir des données récoltées de 2000 à 2015, j’ai pu réaliser des cartes de distribution spatiale des anchois et de leurs oeufs, ainsi que des analyses statistiques afin de comprendre les différences de distribution entre les deux. Il s’avère que les oeufs sont plus au large que les...
Tipo: Text
Palavras-chave: Anchois; Fécondité; Répartition; Golfe de Gascogne; Oeufs.; Anchovies; Fecundity; Repartition; Bay of Biscay; Eggs.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00342/45335/44797.pdf

MaRINET2 D6.4 e-Infrastructure Pilot
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Carval, Thierry; Thijsse, Peter; Ariyo, Christopher.
The WP6 objective is to design and implement the MaRINET 2 e-infrastructure. Within WP6, two key issues are addressed: “Data preservation” and “Data sharing within a VRE” (Virtual Research Environment) leading to these objectives:  - Data preservation: a common policy compliant with international standards (RDA – Research Data Alliance) and European standards for Marine data (SeaDataNet)  - Data access and service : a Virtual Research Environment (VRE) workplace based on common national and European e-infrastructures (such as SeaDataCloud) The MaRINET 2 e-infrastructure supports these via the following actions:  - Collection and storage of MaRINET 2 experiment descriptions and results to secure their interoperability and long-term preservation  -...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00634/74608/74501.pdf

Influence of parentage upon growth in Ostrea edulis: evidence for inbreeding depression
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Naciri-graven, Y; Launey, Sophie; Lebayon, N; Gerard, Andre; Baud, Jean-pierre.
Genetic variability for growth was analysed in three populations of Ostrea edulis, selected for resistance to the protozoan parasite Bonamia ostreae. This study was undertaken first to determine the potential for selection for growth in populations that have never been selected for this character, and second to estimate heterosis versus inbreeding depression. Growth was monitored in culture for 10 months. The selected populations (namely S85-G3, S89I-G2 and S89W-G2), their crossbred population and a control population were composed of full-sib families whose parents were already genotyped using five microsatellite markers. This genotyping allowed the estimation of genetic relatedness among pairs of parents. The parents' relatedness was then correlated with...
Tipo: Text
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-2719.pdf

Le littoral de la région Nord-Pas de Calais - Apports à la mer
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chaussepied, Marcel; Arnal, Olivier; Grossel, Hubert; Delattre, Jean-marie; Wartel, Michel.
Tipo: Text
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00080/19131/16726.pdf

Fishing fleet typology, economic dependence, and species landing profiles of the French fleets in the Bay of Biscay, 2000-2006
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Daures, Fabienne; Rochet, Marie-joelle; Van Iseghem, Sylvie; Trenkel, Verena.
Thirty French fleets fishing primarily in the Bay of Biscay were defined based on techno-economic input criteria: i) 18 fishing gear or gear combinations ii) the location of fishing grounds visited during a year (&lt;12 nautical miles from coast, beyond 12 nm or both) and iii) total vessel length (&lt;20 m for trawlers and other gears &lt;24 m). The fleets were then characterised in terms of horse power, economic dependence on a list of nine dominant commercial species (sole, Nephrops, sea bass, hake, monkfish, anchovy, cuttlefish, sardine and squid) and their contribution to the landings of these species from the Bay of Biscay. Most fleets derived the majority of their income from one or two among the nine species. Species dependencies changed little...
Tipo: Text
Palavras-chave: Fishing methods; Fishing vessels; Fleet dynamics; Mixed fisheries; Catch distribution; Economy; Atlantic Ocean.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00000/11172/7530.pdf

Late summer particulate organic carbon export and twilight zone remineralisation in the Atlantic sector of the Southern Ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Planchon, F.; Cavagna, A-j.; Cardinal, Damien; Andre, L.; Dehairs, F.
As part of the GEOTRACES Bonus-GoodHope (BGH) expedition (January-March 2008) in the Atlantic sector of the Southern Ocean, particulate organic carbon (POC) export was examined from the surface to the mesopelagic twilight zone using water column distributions of total Th-234 and biogenic particulate Ba (Ba-xs). Surface POC export production was estimated from steady state and non steady state modelling of Th-234 fluxes, which were converted into POC fluxes, using the POC/Th-234 ratio of large, potentially sinking particles (&gt;53 mu m) collected via in situ pumps. Deficits in Th-234 activities were observed at all stations from the surface to the bottom of the mixed layer, yielding Th-234 export fluxes from the upper 100 m of 496 +/- 214 dpm m(-2) d(-1)...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00181/29206/27580.pdf

Constraints on the magnitude and patterns of ocean cooling at the Last Glacial Maximum
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Waelbroeck, C.; Paul, A.; Kucera, M.; Rosell-mele, A.; Weinelt, M.; Schneider, R.; Mix, A. C.; Abelmann, A.; Armand, L.; Bard, E.; Barker, S.; Barrows, T. T.; Benway, H.; Cacho, I.; Chen, M. T.; Cortijo, E.; Crosta, X.; De Vernal, A.; Dokken, T.; Duprat, J.; Elderfield, H.; Eynaud, F.; Gersonde, R.; Hayes, A.; Henry, M.; Hillaire-marcel, C.; Huang, C. C.; Jansen, E.; Juggins, S.; Kallel, N.; Kiefer, T.; Kienast, M.; Labeyrie, L.; Leclaire, H.; Londeix, L.; Mangin, S.; Matthiessen, J.; Marret, F.; Meland, M.; Morey, A. E.; Mulitza, S.; Pflaumann, U.; Pisias, N. G.; Radi, T.; Rochon, A.; Rohling, E. J.; Sbaffi, L.; Schafer-neth, C.; Solignac, S.; Spero, H.; Tachikawa, K.; Turon, J. -l.
Observation-based reconstructions of sea surface temperature from relatively stable periods in the past, such as the Last Glacial Maximum, represent an important means of constraining climate sensitivity and evaluating model simulations. The first quantitative global reconstruction of sea surface temperatures during the Last Glacial Maximum was developed by the Climate Long-Range Investigation, Mapping and Prediction (CLIMAP) project in the 1970s and 1980s. Since that time, several shortcomings of that earlier effort have become apparent. Here we present an updated synthesis of sea surface temperatures during the Last Glacial Maximum, rigorously defined as the period between 23 and 19 thousand years before present, from the Multiproxy Approach for the...
Tipo: Text
Ano: 2009
URL: https://archimer.ifremer.fr/doc/00218/32914/31395.pdf

Wind and temperature controls on Alexandrium blooms (2000-2007) in Thau lagoon (Western Mediterranean)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Laanaia, Nabil; Vaquer, Andre; Fiandrino, Annie; Genovesi, Benjamin; Pastoureaud, Annie; Cecchi, Philippe; Collos, Yves.
Since 1998, blooms of Alexandrium catenella/tamarense in the lagoon of Thau developed regularly each autumn, reaching a maximum of several millions cells per liter in 2004. By contrast, spring blooms occurred only twice (in 2000 and 2007). During these periods, sea surface temperatures (SST) and the wind patterns appear to impact the bloom occurrences much more than the apparent limiting resources such as inorganic nutrients. The analysis of SST and wind from April to June and September to November (from 2000 to 2007) indicates first that there has to be an initial wind stress in order to resuspend the cysts buried in the sediment. Blooms then occur after a period of weak winds (&lt;4 m s(-1)) and of stable SST close to 20 degrees C (+/- 2 degrees C)....
Tipo: Text
Palavras-chave: Alexandrium catenella/tamarense; Wind stress; SST; Thau lagoon; Mediterranean.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00157/26790/24936.pdf

Landing obligation in EU fisheries (STECF-13-23). 4 - 8 November 2013, Brussels
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: STECF.
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00165/27675/25868.pdf

Low Connectivity between Mediterranean Marine Protected Areas: A Biophysical Modeling Approach for the Dusky Grouper Epinephelus marginatus
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Andrello, Marco; Mouillot, David; Beuvier, Jonathan; Albouy, Camille; Thuiller, Wilfried; Manel, Stephanie.
Marine protected areas (MPAs) are major tools to protect biodiversity and sustain fisheries. For species with a sedentary adult phase and a dispersive larval phase, the effectiveness of MPA networks for population persistence depends on connectivity through larval dispersal. However, connectivity patterns between MPAs remain largely unknown at large spatial scales. Here, we used a biophysical model to evaluate connectivity between MPAs in the Mediterranean Sea, a region of extremely rich biodiversity that is currently protected by a system of approximately a hundred MPAs. The model was parameterized according to the dispersal capacity of the dusky grouper Epinephelus marginatus, an archetypal conservation-dependent species, with high economic importance...
Tipo: Text
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00391/50283/50924.pdf

Avis sur l'extension de la zone de dérogation pour la pêche au chalut dans la bande des trois milles, autorisée dans les eaux du quartier maritime de Saint Brieuc
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Talidec, Catherine.
Tipo: Text
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00214/32478/79407.pdf

Heavy metals effect on bacterial communities from coastal sediments.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Modamio, X; Mallo, S.
The effects of heavy metals on bacterial communities of sea sediments are studied. Samples were taken from a very polluted zone near Barcelona. Bacterial populations were estimated by the plate count method, using culture medium amended with heavy metals (Hg, Cd, Cr and Cu). The authors have also made a numerical taxonomy study with a hundred resistant strains, using 129 unit characters.
Tipo: Text
Palavras-chave: Microorganisms; Marine environment; Toxicity; Bacteria; Numerical taxonomy; Sediment pollution; Pollution effects; Heavy metals.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-1013.pdf

Modelling nitrogen, primary production and oxygen in a Mediterranean lagoon. Impact of oysters farming and inputs from the watershed
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chapelle, Annie; Menesguen, Alain; Deslous-paoli, Jean-marc; Souchu, Philippe; Mazouni, Nabila; Vaquer, André; Millet, Bertrand.
An ecosystem model based on nitrogen cycling and oxygen has been developed for the Thau lagoon. It takes into account the specific features of this Mediterranean lagoon, a semi-confined system with watershed inputs and oyster farming. The ecosystem model uses currents calculated by a two-dimensional hydrodynamic model and integrated into a box model. This model is compared with a year survey data and used to estimate nitrogen and oxygen fluxes between the different ecosystem compartments. The yearly simulation shows that the ecosystem behavior is driven by meteorological forcing, especially rain which causes watershed inputs. These inputs trigger microphytoplankton growth, which is responsible for new primary production. During dry periods, nitrogen is...
Tipo: Text
Palavras-chave: Oxygen; Nitrogen; Oysters; Primary production; Box model; Lagoon ecosystem.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-725.pdf

Physiological and behavioral responses of phytoplankton communities to nutrient availability in a disturbed Mediterranean coastal lagoon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Leruste, A.; Pasqualini, V.; Garrido, M.; Malet, Nathalie; De Wit, R.; Bec, Beatrice.
Short-term bioassays were conducted in Biguglia lagoon (Corsica) to study the physiological and behavioral responses of phytoplankton to N- and P-availability. Natural communities were collected in two stations representative of the two sub-basins, at three periods with contrasting environmental characteristics to address the impact of seasonal variability. These samples were separately enriched with a full N and P enrichment, and with enrichments minus N or minus P. Phytoplankton size structuration, diversity, and growth of the total phytoplankton, the micro-, nano- and ultraphytoplankton were evaluated using spectrofluorimetry, and optical microscopy. Results showed that the communities were fueled by NO3− in the wet periods (autumn and spring) and NH4+...
Tipo: Text
Palavras-chave: Growth rate; Dilution experiment; Eutrophication; Functional traits.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00481/59238/61948.pdf

Coupled physical/biogeochemical modeling including O-2-dependent processes in the Eastern Boundary Upwelling Systems: application in the Benguela
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gutknecht, E.; Dadou, Isabelle; Le Vu, B.; Cambon, Gildas; Sudre, J.; Garcon, V.; Machu, Eric; Rixen, T.; Kock, A.; Flohr, A.; Paulmier, A.; Lavik, G.
The Eastern Boundary Upwelling Systems (EBUS) contribute to one fifth of the global catches in the ocean. Often associated with Oxygen Minimum Zones (OMZs), EBUS represent key regions for the oceanic nitrogen (N) cycle. Important bioavailable N loss due to denitrification and anammox processes as well as greenhouse gas emissions (e. g, N2O) occur also in these EBUS. However, their dynamics are currently crudely represented in global models. In the climate change context, improving our capability to properly represent these areas is crucial due to anticipated changes in the winds, productivity, and oxygen content. We developed a biogeochemical model (BioEBUS) taking into account the main processes linked with EBUS and associated OMZs. We implemented this...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00152/26314/24376.pdf

Rapport de mission au Groënland et à Terre-Neuve (campagne 1929)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Beauge, L.
To begin with, it seems necessary to recall the reason why we tried to find new fishing areas in Greenland after the failure of three French trawlers in 1925, and with in mind the quasi-certainty of finding a satisfactory compensation for the lack of fishes on the Newfoundland Bank in the summer. 1927 had been the first year of shortage observed since 1922, date of the first oceanographic studies conducted by the Fisheries Office in Newfoundland. Comparing the previous hydrological results with ours, we reached the conclusion that 1927 had shown a drop in the polar flow and a major hot transgression with an inflow of real Atlantic water of more than 35 [?] on the Great Bank. We concluded that the old saying: "cold year, cod year", corresponding to the...
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1929
URL: http://archimer.ifremer.fr/doc/1929/publication-5818.pdf

Determining bluefin tuna habitat through frontal features in the Mediterranean sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Royer, Francois; Fromentin, Jean-marc; Farrugio, Henri; Gaspar, Philippe.
The distribution patterns of bluefin tuna schools observed during the STROMBOLI EU project (2000-2002) were analysed in relation to oceanographic conditions. High-resolution radiometers (AVHRR and SeaWiFS) were used on a daily basis to derive maps of environmental variability. An edge detection technique was especially applied to estimate the position of frontal features. Using a variety of geostatistical and point process techniques, we were able to show that the distribution of bluefin schools was partially driven by the occurrence of transient fronts in the Gulf of Lions. This is believed to be mainly a trophic association, since enhanced convergence and retention processes occur at fronts, possibly leading to higher prey densities (e.g. anchovies). The...
Tipo: Text
Palavras-chave: Thunnus thynnus; Aerial survey; Gulf of Lions; Sea surface temperature; Ocean colour; Fronts.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/00194/30504/28914.pdf

Interpreting Paleoenvironments, Subsidence History and Sea-Level Changes of Passive Margins From Seismic and Biostratigraphy
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hardenbol, J; Vail, Pr; Ferrer, J; Montadert, L; Blanchet, R.
Interaction between basement subsidence, eustatic sea-level changes, and varying sediment supply shapes the sediment accumulations along passive continental margins. Detailed analysis of the sediments with seismic stratigraphy and well data permits quantification of the subsidence history and reconstruction of paleoenvironments and sea-level changes through time. Geohistory analysis provides a quantitative analysis of basin subsidence using geologic time-depth diagrams to visualize the total basin subsidence. Long-term eustatic changes are a significant component of the thermo-tectonic subsidence curve. These changes can be quantified by measuring dpearture from an established set of calculated subsidence curves. Short-term, rapid changes of sea level can...
Tipo: Text
Ano: 1981
URL: http://archimer.ifremer.fr/doc/00245/35652/34161.pdf

Diagenetic Processes in Aquaculture Ponds Showing Metal Accumulation on Shrimp Gills
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lemonnier, Hugues; Royer, Florence; Caradec, Florian; Lopez, Etienne; Hubert, Clarisse; Rabiller, Emilie; Desclaux, Terence; Fernandez, Jean-michel; Andrieux-loyer, Francoise.
The gill is the organ by which many toxic metals are taken up by crustaceans. Iron is known to precipitate at its surface, a phenomenon recently observed in some tropical aquaculture ponds. The present study uses a field approach to understand better the environmental conditions and ecological processes involved in this deposit. Because shrimp are exposed to reduced products originating from organic waste accumulated in the sediment, spatial variation in pH, redox potential and concentrations of dissolved metals in pore water were investigated in these ponds. Total organic carbon, acid volatile sulfide and pyrite were also analyzed in the solid phase. Fe2+ in pore waters showed high spatial variability between ponds and within the same pond with...
Tipo: Text
Palavras-chave: Shrimp aquaculture sustainability; Iron deposits; Gills; Sediment acidification; Redox dynamic; Dynamic of metals; Pyrite.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00678/79026/81450.pdf

Field and mesocosm trials on passive sampling for the study of adsorption and desorption behaviour of lipophilic toxins with a focus on OA and DTX1
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fux, E; Marcaillou-le Baut, Claire; Mondeguer, Florence; Bire, R; Hess, Philipp.
It has been demonstrated that polymeric resins can be used as receiving phase in passive samplers designed for the detection of lipophilic marine toxins at sea and was referred to as solid phase adsorption toxin tracking (SPATT). The present study describes the uptake and desorption behaviour of the lipophilic marine toxins okadaic acid (OA) and dinophysistoxin-1 (DTX1) from Prorocentrum lima cultures by five styrene-divinylbenzene based polymeric resins Sepabeads (R) SP850, Sepabeads (R) SP825L, Amberlite (R) XAD4, Dowex (R) Optipore (R) L-493 and Diaion (R) HP-20. All resins accumulated OA and DTX1 from the P. lima culture with differences in adsorption rate and equilibrium rate. Following statistical evaluation, HP-20, SP850 and SP825L demonstrated...
Tipo: Text
Palavras-chave: Polymeric resin; Dinophysistoxin 1; Okadaic acid; SPATT; Prorocentrum lima.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4739.pdf

Etude pluridisciplinaire en écologie lagunaire (étang de Thau, France) : stratégie d'échantillonnage et organisation spatiale du phytoplancton
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Jarry, Vincent.
Une étude pluridisciplinaire sur l'écologie l'étang de Thau a permis de récolter une quantité importante d'information, à quatre périodes différentes de l'année (1986-1987), sur un réseau de 63 stations réparties selon un maillage carré de 1 km. Fort de cette information multivariée nous proposons une méthodologie pour sélectionner un sous-ensemble de station (20) permettant de reproduire la répartition spatiale d'une dizaine de variables environnementales. Après cette première réflexion sur la stratégie d'échantillonnage, nous abordons en deux étapes l'étude du phytoplancton de l'étang de Thau. En premier lieu, en comparant la répartition spatiale de pigments chlorophylliens (chlorophylle a, chlorophylle b et chlorophylle c) avec celle des communautés...
Tipo: Text
Palavras-chave: Phytoplancton; Pigments chlorophylliens; Structure des communautés; Répartition spatiale; Écologie lagunaire; Modélisation écologique; Stratégie d'échantillonnage; Analyses multivariées.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00055/16579/14081.pdf

Seguimiento a escala piloto de la ovogénesis de la lubina (Dicentrarchus labrax l.) bajo control de fotoperiodo en diferentes estaciones del año
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bouget, Jean-francois; La Gandera De, Fernando.
The pilot scale pursuit of ovogenesis in sea bass (Dicentrarchus .labrax L.) has been realized under photoperiod control in different seasons with the consequent variations in temperature. 5 lots of spawners have been kept in 12 m3 tanks: 3 in spring ascent temperature conditions with similar results; 1 in the last phase of descent temperature in autumn, and 1 with natural photoperiod and temperature conditions. In all cases the spawn was induced with LHRHa obtaining identical quantity and quality results. From comparison of results in the 5 lots can be infer that ovogenesis development is independent of temperature range but a descent thermoperiod could promote its activation in long photoperiod conditions.
Tipo: Text
Ano: 1987
URL: http://archimer.ifremer.fr/doc/00272/38276/36459.pdf

Joint use of echosounding, fishing and video techniques to assess the structure of fish aggregations around moored Fish Aggregating Devices in Martinique (Lesser Antilles)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Doray, Mathieu; Josse, E; Gervain, P; Reynal, Lionel; Chantrel, Josselin.
From April 2003 to April 2004 monthly sea surveys were conducted around 2 fish aggregating devices (FADs) moored at 2000 and 2500 m depth in Martinique (Lesser Antilles). The use of a dual frequency splitbeam echosounder combined with an underwater camera and fishing methods allowed assessment of average space and time distribution of pelagic fish aggregated beneath the FADs, as well as identification of their overall size and species composition. At daytime, 4 fish aggregations were identified at each FAD, representing 4 distinct types: i) an aggregation of small juvenile tuna (mean fork length, FL: 30 cm) observed very close to the surface in 25% of daytime periods; ii) a small surface aggregation dominated by carangids, Caranx crysos, present in 65% of...
Tipo: Text
Palavras-chave: Lesser Antilles; Tuna; Aggregative behaviour; Small scale fishery; Underwater video; Acoustics; Fish aggregating device.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3634.pdf

Relationships between oyster mortality patterns and environmental data from monitoring databases along the coasts of France
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Soletchnik, Patrick; Ropert, Michel; Mazurie, Joseph; Fleury, Pierre-gildas; Le Coz, Florence.
Oyster mortality was monitored at multiple sites along the French coastline (around 5 500 km) between 1993 and 2005. Mortality data for one- and two-year-old oysters were collected over 10–12 years in 39 oyster culture sites bordering 3 different "seas": the English Channel, Bay of Biscaye and Mediterranean. Combining these data with records from environmental monitoring databases, 11 of these sites had consistent chronological data sets including both environmental data and mortality records. Mortality in one-year-old oysters was clearly summer mortality (49% of their annual mortality) whereas mortality of two-year-olds occurred mostly in spring (51%). Analysis of variance revealed that "coastal area" was the main influence on mortality of one-year-olds...
Tipo: Text
Palavras-chave: Mortality; Environment; Crassostrea gigas; Pacific oyster.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3295.pdf

Magma plumbing system and seismicity of an active mid-ocean ridge volcano
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Schmid, Florian; Schlindwein, Vera; Koulakov, Ivan; Ploetz, Aline; Scholz, John-robert.
At mid-ocean ridges volcanism generally decreases with spreading rate but surprisingly massive volcanic centres occur at the slowest spreading ridges. These volcanoes can host unexpectedly strong earthquakes and vigorous, explosive submarine eruptions. Our understanding of the geodynamic processes forming these volcanic centres is still incomplete due to a lack of geophysical data and the difficulty to capture their rare phases of magmatic activity. We present a local earthquake tomographic image of the magma plumbing system beneath the Segment 8 volcano at the ultraslow-spreading Southwest Indian Ridge. The tomography shows a confined domain of partial melt under the volcano. We infer that from there melt is horizontally transported to a neighbouring...
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00373/48406/48611.pdf

Traitement des déchets de poisson et utilisation des sous-produits (1)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hinard, Gustave.
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1929
URL: http://archimer.ifremer.fr/doc/1929/publication-5819.pdf

Millennial-scale surface and subsurface paleothermometry from the northeast Atlantic, 55-8 ka BP
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Peck, V. L.; Hall, I. R.; Zahn, R.; Elderfield, H.
We present high-resolution records of upper ocean temperatures derived from Mg/Ca ratios of surface-dwelling Globigerina bulloides and subsurface-dwelling Neogloboquadrina pachyderma sinistral and the relative abundance of N. pachyderma sinistral for the period 55-8 ka BP from NE Atlantic sediment core MD01-2461. Millennial-scale temporal variability and longer-term trends in these records enable us to develop a detailed picture of past ocean conditions such as a weakening of thermocline intensity from marine isotope stage 3 (MIS 3) to the last glacial maximum (LGM). The correspondence of all temperature proxies and convergence of paired oxygen isotope (delta O-18) records from both planktonic species implies a breakdown in the thermocline and year-round...
Tipo: Text
Ano: 2008
URL: https://archimer.ifremer.fr/doc/00237/34797/33340.pdf

The Channel habitat atlas for marine resource management (CHARM): an aid for planning and decision-making in an area under strong anthropogenic pressure
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Martin, C. S.; Carpentier, Andre; Vaz, Sandrine; Coppin, Franck; Curet, L.; Dauvin, J. -c.; Delavenne, Juliette; Dewarumez, J. -m.; Dupuis, L.; Engelhard, G.; Ernande, Bruno; Foveau, A.; Garcia, C.; Gardel, Laure; Harrop, S.; Just, R.; Koubbi, P.; Lauria, Valentina; Meaden, G. J.; Morin, Jocelyne; Ota, Y.; Rostiaux, Emilie; Smith, R.; Spilmont, N.; Verin, Yves; Villanueva, Ching-maria; Warembourg, Caroline.
The eastern English Channel, the narrow channel of water separating northern France and southeast England is an area of intense human use of the array of resources concentrated into its relative small area. The vulnerability of living resources and their habitats brought together French and British maritime experts within a common project (called CHARM): to create an atlas of marine resource habitats in the eastern English Channel so as to provide planners and decision-makers with the necessary information to help managing the use of its living and non-living resources. This multidisciplinary and richly illustrated atlas provides abundant information on the legal framework and physical environment; benthic invertebrates, fish and their habitats; fishing...
Tipo: Text
Palavras-chave: Eastern English Channel; Dover Strait; Benthos; Fish; Habitat; Ecosystem; Marine spatial planning; Fisheries; Legislation; Trophic network; Food web; GIS; Geographic Information System.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00000/11169/7523.pdf

Variations des caractères biométriques et des constitutants biochimiques d'une population C. gigas (Thunberg) d'un parc d'élevage du bassin de Marennes - Oléron en 1974
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gras, Marie-paule; Gras, Paul.
At the beginning of its introduction, following the massive mortality rate of 1970-1971 that struck the Portuguese oyster, Crassostrea angulata (COMPS and GRAS 1973), the oyster from the Pacific, Crassostrea gigas, displayed excellent growth in addition to exceptional hardiness and resistance to mortality. But, since 1973, in most of the farming areas, there has been a slowdown in the growth of the oysters and an at times quite pronounced decrease in their quality. It was in order to better understand their adaptation to the environment and the causes of the lowering of their growth rate and their condition that a study was undertaken in 1974, in one of the largest areas of flat cultivation of the Marennes-Oléron basin, located on the east coast of the...
Tipo: Text
Palavras-chave: Marennes Oléron; Biochimie; Biométrie; Huîtres; Crassostrea gigas.
Ano: 1975
URL: http://archimer.ifremer.fr/doc/1975/acte-2988.pdf

Large-amplitude internal tides, solitary waves, and turbulence in the central Bay of Biscay
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Xie, X. H.; Cuypers, Y.; Bouruet-aubertot, P.; Ferron, Bruno; Pichon, Annick; Lourenco, A.; Cortes, Norbert.
Microstructure and fine-scale measurements collected in the central Bay of Biscay during the MOUTON experiment are analyzed to investigate the dynamics of internal waves and associated mixing. Large-amplitude internal tides (ITs) that excite internal solitary waves (ISWs) in the thermocline are observed. ITs are dominated by modes 3 and 4, while ISWs projected on mode 1 that is trapped in the thermocline. Therein, ITs generate a persistent narrow shear band, which is strongly correlated with the enhanced dissipation rate in the thermocline. This strong dissipation rate is further reinforced in the presence of ISWs. Dissipation rates during the period without ISWs largely agree with the MacKinnon-Gregg scaling proposed for internal wavefields dominated by a...
Tipo: Text
Palavras-chave: Internal tides; Solitary waves; Turbulence; Bay of Biscay.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00151/26232/24299.pdf

Caracteristiques saisonnieres de l'hydrobiologie du complexe estuariende Marennes-Oleron (France).
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Heral, Maurice; Razet, Daniel; Deslous-paoli, Jean-marc; Berthome, Jean-paul; Garnier, J.
Four seasonal compaigns providing a sampling of 15 stations each followed during half a tide cycle, i.e. 120 water samples permit the definition of the main hydrobiological features of Marennes-Oleron Bay: salinity and turbidity, phytoplanktonic biomasses, ATP concentrations. The authors suggest that a new way of adapted sampling to their objectives, will work out in the future by sampling during tidal cycles but as frequently as possible.
Tipo: Text
Palavras-chave: Seasonal variations; Salinity; ATP; Estuaries; Turbidity; Hydrobiology; Salinity; Phytoplankton; Estuaries; Biomass; Hydrobiology; Physicochemical properties; Phytoplankton; Environmental conditions; Biomass.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/1982/publication-1854.pdf

Pilot Census of marine life in the Gulf of Maine: contributions of technology
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Foote, Kg.
Recent advances in physical oceanography, sampling and observation tools, and data management methods are sufficient to enable a wide range of organisms in the Gulf of Maine to be quantified and related both to other organisms and to the physical habitat. A pilot Census of marine life in the Gulf of Maine would advance the goals of ecosystem understanding and management in a timely manner. A prerequisite is knowledge of the distribution and abundance of the organisms that inhabit, both permanently and transiently, the Gulf of Maine and adjacent waters, namely those of Georges Bank, Browns Bank, and Slope Sea, including the New England seamounts. Both systematic and synoptic investigations of a spectrum of marine life are needed to supplement current data...
Tipo: Text
Palavras-chave: Recensement de la vie marine; Golfe du Maine; Outils d'échantillonnage et d'observation; Census of marine life; Gulf of Maine; Observation and sampling tools.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00322/43304/43040.pdf

Disease problems in farmed penaeids in Italy
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Giorgetti, G.
The industrial farming of penaeid shrimps began in Italy in the early eighties with the introduction of Penaeus japonicus , that replaced Penaeus kerathurus . In Italy there are no farms for producing eggs and fry on a commercial basis, the restocking material is usually imported from abroad at the stage of post-larval 22-25. Various pathologies were found that appeared to be connected with husbandry techniques, such as overfeeding with low water exchange, overcrowding and poor water quality. Our laboratory diagnosed diseases caused by: virus: infectious pancreatic necrosis (IPN) virus was isolated on EPC-RTG2 cells from spawners without apparent mortality; bacteria: the most frequently isolated bacterium was Vibrio anguillarum , on TSA, marine agar and...
Tipo: Text
Palavras-chave: MED; Italy Penaeus japonicus Fungi Parasites Viruses Pathology Growth Fry Eggs Sea water Diseases Shrimp culture.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1451.pdf

Etude de l'influence de la température, liée à la pollution thermique, sur la survie et la biologie de quelques mollusques des substrats meubles
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bodoy, Alain.
Tipo: Text
Ano: 1976
URL: http://archimer.ifremer.fr/doc/00036/14760/12066.pdf

High pCO2 promotes coral primary production
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Biscéré, T.; Zampighi, M.; Lorrain, Anne; Jurriaans, S.; Foggo, A.; Houlbrèque, F.; Rodolfo-metalpa, R.
While research on ocean acidification (OA) impacts on coral reefs has focused on calcification, relatively little is known about effects on coral photosynthesis and respiration, despite these being among the most plastic metabolic processes corals may use to acclimatize to adverse conditions. Here, we present data collected between 2016 and 2018 at three natural CO2 seeps in Papua New Guinea where we measured the metabolic flexibility (i.e. in hospite photosynthesis and dark respiration) of 12 coral species. Despite some species-specific variability, metabolic rates as measured by net oxygen flux tended to be higher at high pCO2 (ca 1200 µatm), with increases in photosynthesis exceeding those of respiration, suggesting greater productivity of...
Tipo: Text
Palavras-chave: Ocean acidification; Coral reefs; Acclimatization; Metabolic flexibility; CO2 seeps.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00509/62051/66205.pdf

DYNAPSE - DYNamiques des efflorescences et de la toxicité des espèces phytoplanctoniques nuisibles du genre PSEudo nitzschia en région Loire Bretagne
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Belin, Catherine; Chapelle, Annie; Delmas, Daniel; Nezan, Elisabeth; Siano, Raffaele.
Les efflorescences de la diatomée Pseudo-nitzschia sont largement répandues sur les côtes Manche-Atlantique depuis une trentaine d’années (source Rephy). Depuis les années 2000 elles y sont parfois associées des événements toxiques du type ASP (Amnesic Shellfish Poisonning) qui perturbent grandement les pêcheries de coquillages et notamment celles de coquilles Saint Jacques. Les efflorescences et toxicités liées aux Pseudo-nitzschia sont des phénomènes en augmentation sur les côtes françaises mais aussi mondialement. Le genre Pseudo-nitzschia comprend plusieurs espèces très difficiles à identifier en routine or certaines sont toxiques et d’autres pas. Les facteurs environnementaux abiotiques et biotiques contrôlent à la fois la croissance des microalgues...
Tipo: Text
Palavras-chave: Algues toxiques; Pseudo nitzschia; Toxicité des coquillages; Pêcheries; Facteurs environnementaux.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00189/30035/28521.pdf

Recherches sur la reproduction des huîtres indigènes dans le Morbihan en 1929
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boury, M.
Les investigations annuelles relatives à la production du naissain dans le Morbihan furent poursuivies pendant les mois de juin, juillet et août 1928. Grâce à l'obligeance de M. LE GOUAR, Administrateur de l'Inscription Maritime à Auray, et à la collaboration de M. RAPHENNE, Chef de la Station ostréicole d'Auray, de M. THIÉBLEMONT, Président du Syndicat ostréicole du Morbihan, des observations méthodiques purent être exécutées journellement en plusieurs points des rivières d'Auray et de la Trinité (ou du Crach). Les observations portèrent sur la température et la densité de l'eau, sur la ponte des huîtres (ostrea edulis), sur la fixation et la croissance du naissain. [OCR NON CONTRÔLE]
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1929
URL: http://archimer.ifremer.fr/doc/1929/publication-5796.pdf

A Sensitivity Analysis of the Impact of Rain on Regional and Global Sea-Air Fluxes of CO2
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ashton, I. G.; Shutler, J. D.; Land, P. E.; Woolf, D. K.; Quartly, G. D.
The global oceans are considered a major sink of atmospheric carbon dioxide (CO2). Rain is known to alter the physical and chemical conditions at the sea surface, and thus influence the transfer of CO2 between the ocean and atmosphere. It can influence gas exchange through enhanced gas transfer velocity, the direct export of carbon from the atmosphere to the ocean, by altering the sea skin temperature, and through surface layer dilution. However, to date, very few studies quantifying these effects on global net sea-air fluxes exist. Here, we include terms for the enhanced gas transfer velocity and the direct export of carbon in calculations of the global net sea-air fluxes, using a 7-year time series of monthly global climate quality satellite remote...
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00383/49404/49893.pdf

Determination du profil des flores bacteriennes des zones littorales. Application a l'evaluation de l'impact des rejets
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bunetel, L; Segui, A; Guerin, J; Lerman, I; Cormier, M.
The principle of this method is to evaluate, by counts exercised upon selective media, the relative importance of the different bacteria families in the flora of the coastal waters. It is important to separate the contaminant species and the commensal species in the marine environment. Ten culture media distributed into four categories (selective, non selective, saline and non saline) were examined by numeration. Counts were transferred on a diagram allowing to plot down a profile of bacterial flora of water sampled from a given geographical area. The profiles are arranged by a classification method. The sampling points with similar or adjoining profiles were assembled and marked on the chart. In this way, the authors obtained areas representing the impact...
Tipo: Text
Palavras-chave: Bacteria; Coastal waters; Microbiological culture; Sewage disposal; Microbial contamination; Bacterial counters; Bacteria collecting devices.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-1004.pdf

Filets profonds. Guadeloupe. 2019. Observation des Marées au débarquement - OBSDEB
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public. Ces indicateurs intègrent...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00666/77793/79959.pdf

Quartier maritime Noirmoutier. 2019. Activité des navires de pêche.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d’Informations Halieutiques » (SIH) de l’Ifremer, qui constitue le réseau d’observation des ressources halieutiques et des usages associés. Ce projet s’inscrit dans la mission de service d’intérêt public de l’Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l’analyse du secteur des pêches, le SIH a en charge l’élaboration d’indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche et du grand public.
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00650/76215/77178.pdf

Etude intégrée du bassin d'Arcachon. Mise en place d'un Système d'Informations Géographiques pour la gestion administrative et le suivi environnemental
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Simon, S.
Le bassin d'Arcachon est une zone particulièrement complexe d'un point de vue aménagement où cohabitent dans la zone littorale conchyliculture, pêche, plaisance et tourisme. C'est pour cette raison que la station IFREMER d'Arcachon a reçu la mission de réaliser une "étude intégrée", compilation de l'ensemble des données scientifiques disponibles et faisant appel à un système d'information géographique.
Tipo: Text
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00037/14820/12136.pdf

Espaces à risque et information géographique. Observation et surveillance du littoral assurées par Ifremer
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Belin, Catherine.
Ce diaporama a été présenté dans le cadre du Master Cartographie des Espaces à Risque, à l'IGARUN, Nantes, le 26 septembre 2017. Après la présentation des réseaux nationaux de surveillance mis en oeuvre par Ifremer, en particulier du REPHY (Réseau d'Observation et de Surveillance du Phytopancton et de l'Hydrologie dans les Eaux Littorales), un historique des différents zonages du littoral utilisés pour agréger les données d'un point de vue géographique, est exposé : zones marines et masses d'eau DCE. Pour ce dernier, les principaux critères ayant permis de définir les masses d'eau littorales (côtières et de transition) sont décrits. Puis divers exemples de représentations graphiques et cartographiques des données acquises par le REPHY sont discutés, avec...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00449/56058/57580.pdf

L'aquaculture des Pétoncles ; état présent et perspectives
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Latrouite, D.
The aquaculture methods worked out in Japan with japanese scallop Patinopecten yessoensis may find an application for black scallop (Chlamys varia) and queen scallop (Chlamys opercularis) that live in our coastal waters. The studies carried out till now, mainly in Brest and Quiberon were especially devoted to spat collection. Material and methods similar to those used for scallop, Pecten maximus, were improved to handle several thousands of collectors. The methods offorecasting settlement periods were also improved.
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/publication-6041.pdf

Hatton Bank : Faroe Bank : Channel geophysical survey : RRS Charles Darwin Cruise CD180 : BGS Cruise 06/02
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Stewart, Ha; Hitchen, K; Tuitt, A.
This report describes the initial geological observations made during BGS Cruise 06/02 carried out from the 18th May to the 9th June 2006 as part of the ongoing Marine, Coastal and Hydrocarbons Programme. Survey operations were undertaken in UK and Faroese national waters and were planned to integrate with existing BGS regional data and to fill in knowledge gaps.
Tipo: Text
Palavras-chave: Bill Bailey's Bank; Cenozoic; Compression; Faroe Bank; Faroe Bank Channel; Hatton Bank; Hatton–Rockall Basin; Lousy Bank; Rockall Bank.
Ano: 2006
URL: https://archimer.ifremer.fr/doc/00503/61459/65222.pdf

Trophic relationships between metazooplankton communities and their plankton food sources in the Iles Eparses (Western Indian Ocean)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dupuy, Christine; Pagano, Marc; Got, Patrice; Domaizon, Isabelle; Chappuis, Alexis; Marchessaux, Guillaume; Bouvy, Marc.
Coral reef and atoll lagoons are among the most diversified marine ecosystems but also the most affected by the combined effects of climate change and human activities. The Iles Eparses (Scattered Islands) in the Western Indian Ocean have been little affected by human pressure and can be considered to be “pristine” ecosystems. Metazooplankton plays a major role in the functioning and productivity of aquatic ecosystems, and this study was undertaken: (i) to determine the spatial abundance, distribution and species composition of metazooplankton, (ii) to assess the effect of metazooplankton grazing on pico- and nanophytoplankton and (iii) to analyze the trophic positions of metazooplankton by using the stable isotope signatures of a wide variety of taxa and...
Tipo: Text
Palavras-chave: Metazooplankton; Spatial distribution; Grazing effect; Feeding ecology; Iles Eparses; Mayotte.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00317/42850/42259.pdf

Instruction administrative des dossiers de demande de creation ou de rgularisation des piscicultures en eau douce
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Heuze, Y; Huitric, G.
This paper gives a picture of French legislation on the creation or the regularization of freshwater fish breeding through the study of a file by government service.
Tipo: Text
Palavras-chave: France; Legislation; Fish culture; Freshwater aquaculture.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/1993/acte-1333.pdf

Suivi de la reproduction des mollusques d'élevage 1991
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Faury, Nicole; Ratiskol, Jacqueline.
Les conditions météorologiques semblaient cette année à priori favorables à la reproduction des moules. Cependant, le maturation des gonades a été très lente. Ainsi, les premières pontes, de faible importance, ont eu lieu début Avril. Plusieurs émissions tardives sont apparues fin Mai et se sont poursuivies jusqu'au début du mois de Juillet. Elles n'ont pas été importantes et ont conduit à une faible quantité de larves au stade fixation. Un captage "moyen" a été observé début Mai. Ensuite, la présence de quelques larves grosses n'a pas permis un recrutement suffisant. Généralement, suite à la période de reproduction les moules reconstituent rapidement leur réserve; or cette année, elles sont restées maigres jusqu'à la fin Juillet. Le fort déficit...
Tipo: Text
Palavras-chave: Reproduction; Captage; Naissain; Crassostrea gigas; Marennes Oléron; Mytilus edulis.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00072/18285/15857.pdf

Linking wind and interannual upwelling variability in a regional model of the southern Benguela - art. no. 2188
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Blanke, Bruno; Roy, Claude; Penven, Pierrick; Speich, Sabrina; Mcwilliams, James; Nelson, Greville.
We quantify the wind contribution to the development of interannual sea surface temperature (SST) anomalies along the shelf of southern Africa. We compare numerical simulations that differ only in the amount of variability kept in the ERS1/2-derived surface wind forcing. Surprisingly, most of the cold and warm episodes over the Agulhas Bank are strictly related to local fluctuations of the forcing, whereas the shelf of the west coast extending 400 km north of Cape Columbine is equally sensitive to open-sea wind fluctuations. We diagnose the respective role of mesoscale eddy activity and of low frequency and intra-monthly wind fluctuations in generating interannual SST variability. The fair degree of correlation obtained at a few locations between the model...
Tipo: Text
Palavras-chave: Numerical simulation; Wind  fluctuation; Sea surface temperature; Upwelling.
Ano: 2002
URL: https://archimer.ifremer.fr/doc/2002/publication-770.pdf

Using the ALADYM simulation model for exploring the effects of management scenarios on fish population metrics
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Spedicato, Maria Teresa; Poulard, Jean-charles; Politou, Chrissi-yianna; Radtke, Krzysztof; Lembo, Giuseppe; Petitgas, Pierre.
Simulation of fisheries systems is a widely used approach that integrates monitoring and assessment tools. We applied the ALADYM (age-length based dynamic model) simulation model to three different studies aimed at investigating correlations between pressure and population metrics, exploring the viability of different mortality levels in long-term scenarios and predicting the effects of combined management measures. Uncertainty was incorporated into the simulations following the Monte Carlo paradigm. Three stocks were used for these exercises: red mullet in the central-southern Tyrrhenian Sea and European hake in both the Bay of Biscay and the Aegean Sea. The analysis of the relationships between total mortality and indicators highlighted significant...
Tipo: Text
Palavras-chave: Simulation model; Model-based indicators; Fishery management; Reference points; Mullus barbatus; Merluccius merluccius; Mediterranean Sea; Atlantic Ocean.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00011/12226/9008.pdf

Projet Bio indication à La Réunion. Contribution au développement d’indicateurs adaptés aux platiers récifaux de La Réunion. Rapport final 2012
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Goff, Ronan; Ropert, Michel; Bajjouk, Touria; Bein, Aymeric; Cambert, Harold; Cebeillac, Alexandre; Cuet, Pascale; Delacourt, Christophe; Duval, Magali; Maurel, Laurence; Mouquet, Pascal; Nicet, Jean Benoit; Populus, Jacques; Quod, Jean-pascal; Talec, Pascal; Turquet, Jean; Vermenot, Coralie; Zubia, Mayalen.
Le présent document est le rapport final du projet "Bio-Indication à la Réunion ; contribution à la définition d’indicateurs adaptés aux platiers récifaux de la Réunion".  Ce projet comprend deux volets :  Volet 1 : définition d’indicateurs d’enrichissement en nutriments (dystrophie) adaptés aux platiers récifaux réunionnais. Une importante phase d’acquisition de données de terrain portant sur les algues, les cyanobactéries, le corail, la faune associée et les caractéristiques hydrologiques des différents secteurs retenus a été menée entre fin 2010 et fin 2011 sur une année hydrologique complète afin d’essayer de bâtir des indicateurs d’état DCE adaptés aux masses d’eau récifales de la Réunion, et plus précisément des indicateurs de dystrophie. Ce volet...
Tipo: Text
Palavras-chave: Habitats benthiques des platiers récifaux réunionnais; Indicateurs d’enrichissement en nutriments ou de dystrophie; Algues; Corail; Cartographie; Zone intertropicale; La Réunion; Océan Indien; DCE.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00209/32022/30459.pdf

Plongée à Oursins. Méditerranée (Hors Corse). 2017. Observation des Marées au débarquement - OBSDEB
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public. Ces indicateurs intègrent...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00596/70780/69014.pdf

Towards multidisciplinary indicator dashboards for coral reef fisheries management
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Clua, Eric; Beliaeff, Benoit; Chauvet, Claude; David, Gilbert; Ferraris, Jocelyne; Kronen, Mekhi; Kulbicki, Michel; Labrosse, Pierre; Letourneur, Yves; Pelletier, Dominique; Thebaud, Olivier; Leopold, Marc.
The diversity of reef ecosystems, the multiplicity of reef resource uses and the breadth of the range of the island socio-cultural contexts concerned make coral reef fisheries (CRF) management in the South Pacific a complex task. The health and state of the targeted resources depend both on ecosystem characteristics (as determined by ecological and biological factors) and on fishing pressure, whose effects are only partly known. Increasing harvests from commercial and recreational fishing increasingly overlap with traditional Subsistence activity, creating an important CRF management challenge. This paper presents a new approach to CRF assessment and monitoring by providing a set of multidisciplinary indicators. The fisheries system is assessed from three...
Tipo: Text
Palavras-chave: Dashboard; Indicators; Co management; Fishing; Coral reefs.
Ano: 2005
URL: https://archimer.ifremer.fr/doc/2005/publication-716.pdf

Water temperature control on      CO   2     flux and evaporation over a subtropical seagrass meadow revealed by atmospheric eddy covariance
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Van Dam, Bryce R.; Lopes, Christian C.; Polsenaere, Pierre; Price, René M.; Rutgersson, Anna; Fourqurean, James W.
Subtropical seagrass meadows play a major role in the coastal carbon cycle, but the nature of air–water CO2 exchanges over these ecosystems is still poorly understood. The complex physical forcing of air–water exchange in coastal waters challenges our ability to quantify bulk exchanges of CO2 and water (evaporation), emphasizing the need for direct measurements. We describe the first direct measurements of evaporation and CO2 flux over a calcifying seagrass meadow near Bob Allen Keys, Florida. Over the 78‐d study, CO2 emissions were 36% greater during the day than at night, and the site was a net CO2 source to the atmosphere of 0.27 ± 0.17 μmol m−2 s−1 (x̅ ± standard deviation). A quarter (23%) of the diurnal variability in CO2 flux was caused by the...
Tipo: Text
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00654/76656/77789.pdf

Earthquake and typhoon trigger unprecedented transient shifts in shallow hydrothermal vents biogeochemistry
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lebrato, Mario; Wang, Yiming V.; Tseng, Li-chun; Achterberg, Eric P.; Chen, Xue-gang; Molinero, Juan-carlos; Bremer, Karen; Westernstroeer, Ulrike; Soeding, Emanuel; Dahms, Hans-uwe; Kueter, Marie; Heinath, Verena; Joehnck, Janika; Konstantinou, Kostas I.; Yang, Yiing J.; Hwang, Jiang-shiou; Garbe-schoenberg, Dieter.
Shallow hydrothermal vents are of pivotal relevance for ocean biogeochemical cycles, including seawater dissolved heavy metals and trace elements as well as the carbonate system balance. The Kueishan Tao (KST) stratovolcano off Taiwan is associated with numerous hydrothermal vents emitting warm sulfur-rich fluids at so-called White Vents (WV) and Yellow Vent (YV) that impact the surrounding seawater masses and habitats. The morphological and biogeochemical consequences caused by a M5.8 earthquake and a C5 typhoon ("Nepartak") hitting KST (12th May, and 2nd-10th July, 2016) were studied within a 10-year time series (2009-2018) combining aerial drone imagery, technical diving, and hydrographic surveys. The catastrophic disturbances triggered landslides that...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00593/70518/68670.pdf

Preliminary results on automated video-imaging for the study of behavioural rhythms of tubeworms from the tempo-mini ecological module (Neptune, Canada)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Aron, M.; Cuvelier, D.; Aguzzi, J.; Costa, C.; Doya, C.; Sarrazin, Jozee; Sarradin, Pierre-marie.
The presence of behavioural rhythms has been studied in organisms of coastal areas in relation to circadian and tidal cycles, but their presence in benthic fauna inhabiting dark deep-sea regions remains largely unknown. Cabled video-observatories allow the study of these activity rhythms via the acquisition of pictures or footages over extended periods of time. In this work, we present the preliminary steps in the automation of biological data extraction for the determination of deep-sea fauna activity rhythms with TEMPO-mini (NEPTUNE; Canada). Automated analyses of tube worm behaviour were carried out with the Hough transform algorithm. Some different testing parameters were applied to the same image with siboglinid tubes. Tube openings identifications...
Tipo: Text
Palavras-chave: Cabled observatories; TEMPO-mini; NEPTUNE; Time lapse photograpHY; Automated video imaging; Tube worms rhythms.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00287/39835/38360.pdf

Holocene surface ocean conditions of the Norwegian Sea as recorded by Globigerina bulloides (Mg/Ca ratios and ä18O)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dei Tos, Luana.
During my master project I have performed stable isotopes and Mg/Ca analyses of the foraminifera Globigerina bulloides (d’Orbigny, 1826) from the core MD95-2011 located in the Vøring Plateau in the eastern Norwegian Sea (66.97 °N, 7.64 °E at 1048 m water depth). The North Atlantic represents a key area for the study of climate: here the warm Atlantic Water loses most of its heat, sinks and flow back southwards as part of the North Atlantic Deep Water. The Nordic Seas are strongly influenced by Atlantic, Arctic and Polar water. When the Atlantic water flux through the Norwegian Current is stronger, warmer conditions occur in the eastern Nordic Seas (the Norwegian Sea). The Holocene is the period that starts after the last glacial period at 11.7 ka BP and...
Tipo: Text
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00505/61713/65681.pdf

Assessment of the impact of a wastewater treatment process including Advanced Oxidation Technique on environment using chemical and biological indicators
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Caill-milly, Nathalie; De Casamajor, Marie-noelle; Pigot, Thierry; Paulin, Thomas; Bru, Noëlle; Sanchez, Florence; Marticorena, Julien; Lanceleur, Laurent; Gonzalez, Patrice; Daffe, Guillemine.
In a context of several directives for transitional and coastal waters masses (Water Framework Directive, Marine Strategy Framework Directive and Bathing Water Directive), the good ecological status of water but also conservation of marine ecosystem should be quickly achieved. The Basque coastline (SE of the Bay of Biscay) is subject to strong human pressures with a high density of population over the year, and especially during the summer with tourist activities. It generates nutrient discharge, water and sediment pollution and impacts the quality of the marine environment. Such pressure and the way to reduce its impacts are the main concerns of authorities Locally, in order to improve wastewater treatment process, an alternative technical solution is...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00279/39051/37614.pdf

A combined microsatellite multiplexing and boiling DNA extraction method for high-throughput parentage analyses in the Pacific oyster (Crassostrea gigas)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Taris, Nicolas; Baron, S; Sharbel, Tim; Sauvage, Christopher; Boudry, Pierre.
The analysis of parentage using microsatellite markers is of increasing importance, notably in aquaculture genetic research where communal rearing of mixed families can be used to reduce unwanted environmental variance. We present here an optimization of parental genotype assessment for larvae or adults of the Pacific oyster, Crassostrea gigas, using a multiplex system of three microsatellite loci. In conjunction with a simple DNA extraction protocol, this method enables high throughput analyses of parentage in C. gigas. Using this method, we successfully determined the parentage of 93% (1224 out of 1318) of the progeny in a factorial cross between 3 females and 10 males. The inability to genotype the remaining 7% was due to DNA degradation of larvae...
Tipo: Text
Palavras-chave: Oysters; Aquaculture; Parental assignment; High throughput; Larval DNA extraction; Multiplex.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-1814.pdf

Etude des flux d'absorption des nitrates et de l'ammonium par le phytoplancton dans le panache de la Seine
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: L'Helguen, S.; Le Corre, P.
Les quantités d'éléments nutritifs, en particulier d'azote, et de matière organique déversées par les fleuves dans les eaux côtières ont considérablement augmenté ces dernières années en raison d'une part d'une intensification des pratiques agricoles, d'autre part, d'une industrialisation et d'une urbanisation croissante des zones littorales. Ces apports peuvent, à une échelle locale ou à mésoéchelle, modifier de manière importante le fonctionnement des écosystèmes côtiers. Ils peuvent, en particulier, en enrichissant le milieu en azote intensifier les processus d'absorption du phytoplancton et déclencher des proliférations algales. La dégradation et la minéralisation de la matière organique ainsi produite et aussi de la matière organique directement...
Tipo: Text
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00106/21682/19261.pdf

Nutrient behavior in 2 contrasting scottish estuaries, the Forth and Tay
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Balls, Pw.
The distribution and behaviour of nutrients (nitrate, nitrite, ammonia, silicate and phosphate) have been examined over the course of a year in two major Scottish estuaries, the Forth and Tay. Maximum concentrations of nitrate and silicate in both estuaries occur in winter, when mixing is conservative. By contrast maximum phosphate, ammonia and nitrite concentrations (notably in the Forth) are observed in summer, these are related to lower oxygen concentrations both within the water column and sediments. Phosphate, ammonia and nitrite concentrations are high in the Forth relative to the Tay. Phosphate behaviour in plots for both estuaries show some common features including removal at low salinity, mid estuary inputs and simple dilution at high salinity....
Tipo: Text
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00100/21160/18779.pdf

Saisine concernant l'effort de pêche des navires espagnols dans les eaux sous souveraineté ou juridiction française du golfe du Lion et l'atteinte du rendement maximum durable sur le merlu et le rouget
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Jadaud, Angelique; Rouyer, Tristan; Mellon, Capucine; Biseau, Alain; Morandeau, Fabien; Berthou, Patrick.
Rappel de la demande (saisine 14-7383) : - sur les données et la qualification de l’état des stocks de merlu et de rouget du golfe du Lion : · Une présentation critique des données scientifiques les plus récentes actuellement disponibles sur la mortalité par pêche et la biomasse du merlu et du rouget et de leur qualité · Une présentation critique des estimations de points de référence limite qui peuvent être faites pour les stocks de merlu et de rouget : biomasse limite (Blim) et biomasse minimum de précaution (Bpa), mortalité par pêche limite (Flim) et mortalité par pêche maximale de précaution (Fpa) et qui pourraient être reprises dans un plan de gestion. - sur les mesures de gestion complémentaires envisageables pour les pêcheries démersales du golfe du...
Tipo: Text
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00255/36590/35150.pdf

Regard à travers les Vibrio pour mieux comprendre les interactions Hôtes-Bactéries-Environnement
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Travers, Marie-agnes.
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00445/55660/57327.pdf

Assessing the Potential Benefits of the Geostationary Vantage Point for Generating Daily Chlorophyll-a Maps in the Baltic Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bellacicco, Marco; Ciani, Daniele; Doxaran, David; Vellucci, Vincenzo; Antoine, David; Wang, Menghua; D'Ortenzio, Fabrizio; Marullo, Salvatore.
Currently, observations from low-Earth orbit (LEO) ocean color sensors represent one of the most used tools to study surface optical and biogeochemical properties of the ocean. LEO observations are available at daily temporal resolution, and are often combined into weekly, monthly, seasonal, and annual averages in order to obtain sufficient spatial coverage. Indeed, daily satellite maps of the main oceanic variables (e.g., surface phytoplankton chlorophyll-a) generally have many data gaps, mainly due to clouds, which can be filled using either Optimal Interpolation or the Empirical Orthogonal Functions approach. Such interpolations, however, may introduce large uncertainties in the final product. Here, our goal is to quantify the potential benefits of...
Tipo: Text
Palavras-chave: Remote sensing; Ocean color products; Geostationary sensor; Baltic Sea.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00585/69693/67578.pdf

Holocene coastal changes and infilling of the La Perroche marsh (French Atlantic coast)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Clave, B; Masse, L; Carbonel, P; Tastet, Jp.
The La Perroche marsh is a small Holocene marsh on the south-western coast of the Oleron island (Bay of Biscay, France) presently occupied by a freshwater swamp and separated from the ocean by a continuous sand dune ridge. The study of its infill shows first basal conglomeratic deposits with calcareous pebbles on a Cenomanian rough substrate. The Holocene infill since 6000 years BP begins with a very fast sedimentation of sands. Then, the sedimentation becomes finer, with lagoonal to freshwater influences recorded by ostracods. The distribution of these deposits inside the marsh is asymmetric, with a thick sandy-gravely layer in the eastern part and a succession of sands, clays and organic layers in the western part. Communication with the sea is episodic,...
Tipo: Text
Palavras-chave: Changements côtiers; Marais maritime; Holocène; Ostracodes; Sédiments; Coastal changes; Coastal salt marsh; Holocene; Ostracods; Sediments.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00322/43349/42877.pdf

Aménagement de l'aire marine marseillaise et du précontinent du Cap Couronne au Cap de l'Aigle
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Blanc, J.
Tipo: Text
Ano: 1972
URL: http://archimer.ifremer.fr/doc/00077/18788/16364.pdf

Control of the pH for marine microalgae polycultures: A key point for CO2 fixation improvement in intensive cultures
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gales, Amandine; Triplet, Sebastien; Geoffroy, Thibault; Roques, Cécile; Carre, Claire; Le Floc'H, Emilie; Lanfranchi, Mélissa; Simier, Monique; Roque D'Orbcastel, Emmanuelle; Przybyla, Cyrille; Fouilland, Eric.
Recently, CO2 recycling for the production of valuable microalgae has acquired substantial interest. Most studies investigating CO2 conversion efficiency in algal cultures were based on single species, although a stabilising effect of algal diversity on biomass production was recently highlighted. However, addition of CO2 into polyalgal cultures requires a careful control of pH; performance of CO2 conversion, growth and carbon biomass production are affected by pH differently, depending on the species of microalgae. This study investigates the efficiency of CO2 conversion by natural marine algal assemblage cultivated in open, land-based raceways (4.5 m3, 10 m2), working as high rate algal ponds (HRAP). Ponds were enriched with nitrogen and phosphate, pure...
Tipo: Text
Palavras-chave: Carbon yield; Microalgal diversity; PH; Predators.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00612/72403/71392.pdf

Méthodologie des études bactériologiques de zones conchylicoles
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Catherine, Martial.
L'évolution des conditions de contrôle de la qualité des eaux conchylicoles, a abouti, à partir de 1979, à la mise en place progressive d'une réglementation européenne relative aux conditions sanitaires des zones de production et à la mise en marché de mollusques bivalves vivants (directive du Conseil (CEE) du 15 juillet 1991).  Cette directive impose la mise en place d'un système de surveillance périodique. Le choix de la stratégie d'échantillonnage est laissé à l'initiative de l'autorité compétente de chaque Etat, en fonction des normes définies.  L'imprécision des mesures de densité bactérienne, la variabilité des contaminations dans l'espace et le temps, le degré de représentativité de l'échantillonnage montre l'étendue des difficultés rencontrées lors...
Tipo: Text
Palavras-chave: Eaux conchylicoles; Pollution; Coliformes fécaux; Normes; Stratégie d'échantillonnage; Plan de sondage; Statistique; Guide méthodologique.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00107/21809/19384.pdf

Les grandes populations d'algues brunes de la Bretagne méridionale - 1977
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Braud, Jean-paul; Perez, René.
Cette carte fait partie de la série des 21 cartes au 1/10 000e réalisées entre la pointe du Raz et le cap de Trévignon (sud de Concarneau). Elle concerne la bande côtière s'étendant de l'ouest de Lesconil à l'ouest de Loctudy, c'est-à-dire l'entrée est de la baie de Bénodet.
Tipo: Text
Ano: 1977
URL: http://archimer.ifremer.fr/doc/1977/publication-7135.pdf

Analyse des captures de merlu dans les pêcheries au chalutage de fond dans le golfe de Gascogne à partir des observations Obsmer 2011 et 2014.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Biseau, Alain; Cornou, Anne-sophie; Scavinner, Marion.
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00299/41029/40151.pdf

Etude de l'activité enzymatique pour la détection des entérobactéries en eau de mer
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Melikechi, H; Pommepuy, Monique; Caprais, Marie-paule.
Tipo: Text
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00041/15207/12535.pdf

Turbidity retrieval and monitoring of Danube Delta waters using multi-sensor optical remote sensing data: An integrated view from the delta plain lakes to the western-northwestern Black Sea coastal zone
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guttler, Fabio; Niculescu, Simona; Gohin, Francis.
Based on multi-sensor optical remote sensing techniques, more than 80 medium and high spatial resolution satellite images were used for studying the turbidity patterns of Danube Delta waters. During a selected 4-year temporal coverage (2006 to 2009), the turbidity gradients were simultaneously analyzed in the delta plain lakes and in the Black Sea western-northwestern coastal zone. Two distinct, but complementary, methodologies for retrieving turbidity were employed, one for the lakes and the other for the coastal zone. After comparing the turbidity satellite-derived turbidity products with in-situ measurements, the inter-comparability of the products was independently verified. Then, through an integrative analysis, the initial hypothesis of turbidity...
Tipo: Text
Palavras-chave: Turbidity; Satellite remote sensing; Danube Delta; Delta plain lakes; Western-northwestern Black Sea; Danube River plume; Phytoplankton; Macrophytes.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00135/24622/23607.pdf

Etude des nourriceries de la baie de Seine orientale et de l'estuaire de la Seine. Synthese des connaissances.  Identification d'une nourricerie en estuaire de Seine. Analyse de la fonctionnalite de l'estuaire comme nourricerie
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Morin, Jocelyne; Riou, Philippe; Lemoine, Michel; Le Pape, Olivier; Bessineton, Christophe; Vedieu, Christophe; Simon, Serge.
The study carried out from 1995 to 1997 within the framework of "Le Havre" harbour extension project, concerned the description of halieutic populations and the characterization of a coastal nursery in the oriental part of the Seine bay and in the Seine estuary. The main objective was to describe the specific and demographic composition of marine populations as well as their spatio-temporal distribution, and then to assess the biologic and halieutic role of this area. The study also included a research about the dietary needs of fish juveniles living in the estuary. Methodology Five series of surveys were carried out in subtidal and intertidal zones. They were realised in autumn and winter, from September 1995 to March 1997, in an area extending from the...
Tipo: Text
Palavras-chave: Marine population; Halieutic; Biology; Estuary; Seine bay; Nursery.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/rapport-1576.pdf

Low-resolution Australasian palaeoclimate records of the last 2000 years
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dixon, Bronwyn C.; Tyler, Jonathan J.; Lorrey, Andrew M.; Goodwin, Ian D.; Gergis, Joelle; Drysdale, Russell N.
Non-annually resolved palaeoclimate records in the Australasian region were compiled to facilitate investigations of decadal to centennial climate variability over the past 2000 years. A total of 675 lake and wetland, geomorphic, marine, and speleothem records were identified. The majority of records are located near population centres in southeast Australia, in New Zealand, and across the maritime continent, and there are few records from the arid regions of central and western Australia. Each record was assessed against a set of a priori criteria based on temporal resolution, record length, dating methods, and confidence in the proxy-climate relationship over the Common Era. A subset of 22 records met the criteria and were endorsed for subsequent...
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00495/60708/65347.pdf

PICABIA MD 134 - Rapport scientifique. A bord du Marion Dufresne II
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Turon, Jean-louis; Malaize, Bruno.
La Mission océanographique PICABIA MD 134 est la dernière d’un long périple entamé le 4 Mai 2003 avec la campagne PICASSO MD 132 (Paleoclimatology Isotopes Calypso pour les séries sédimentaires Océaniques) . A Brest la campagne SEDICAR (MD 133) a pris le relais avec trois étapes dans le Golfe de Gascogne : BREST –BREST (24/06- 28/06); Après une escale technique, le deuxième leg (12/07-14/07) a permis de relier Brest à Bordeaux (escale et cérémonies officielles des14 Juillet-15 Juillet). SEDICAR 3 a été réalisée entre Bordeaux et la sortie du Golfe de Gascogne.De fait, la campagne PICABIA -MD 134 (Paléoclimatology, Calypso sur la Bordure Ibérique et Africaine) a débuté officiellement le 19 Juillet à 0 :00 heure. Cette mission et les programmes français sont...
Tipo: Text
Ano: 2003
URL: https://archimer.ifremer.fr/doc/00632/74458/74276.pdf

Solutions for ecosystem-level protection of ocean systems under climate change
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Queiros, Ana M.; Huebert, Klaus B.; Keyl, Friedemann; Fernandes, Jose A.; Stolte, Willem; Maar, Marie; Kay, Susan; Jones, Miranda C.; Hamon, Katell; Hendriksen, Gerrit; Vermard, Youen; Marchal, Paul; Teal, Lorna R.; Somerfield, Paul J.; Austen, Melanie C.; Barange, Manuel; Sell, Anne F.; Allen, Icarus; Peck, Myron A.
The Paris Conference of Parties (COP21) agreement renewed momentum for action against climate change, creating the space for solutions for conservation of the ocean addressing two of its largest threats: climate change and ocean acidification (CCOA). Recent arguments that ocean policies disregard a mature conservation research field and that protected areas cannot address climate change may be oversimplistic at this time when dynamic solutions for the management of changing oceans are needed. We propose a novel approach, based on spatial meta-analysis of climate impact models, to improve the positioning of marine protected areas to limit CCOA impacts. We do this by estimating the vulnerability of ocean ecosystems to CCOA in a spatially explicit manner and...
Tipo: Text
Palavras-chave: Climate change; Conservation; COP21; Ecosystem model; Habitat; Marine spatial planning; Ocean; Ocean acidification; Species distribution; Warming.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00360/47089/48566.pdf

Ecologie ichthyologique des  fonds chalutables atlantiques (de la baie ibéro-marocaine à la Mauritanie) et de la Méditerranée occidentale
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Maurin, Claude.
In 1953, Ekman noted with surprise that the Mediterranean, the cradle of civilization and Aristotle's laboratory, was far from being the most well-known sea in Europe. This comment could also be applied to the Atlantic coasts, from the southern Iberian Peninsula to north-west Africa. A few years later, when the observations given here begin, knowledge of coastal zones had taken great strides.  However, this was not the case for the continental slope, and much less so for abyssal plains. Only a few documents report on ocean depths greater than 200 m and the fauna that live there. Many oceanographic research vessels surveyed these regions during the second half of the 19th century, but they only explored them in passing. The main zone of research for these...
Tipo: Text
Ano: 1968
URL: http://archimer.ifremer.fr/doc/1968/publication-3196.pdf

Les principaux fonds de pêche et les ports du littoral français
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Danois, Edouard; Le Gall, Jean.
Tipo: Text
Ano: 1936
URL: http://archimer.ifremer.fr/doc/00022/13318/10364.pdf

Rapport annuel 1996
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
1996 a été une année du Pacifique pour L'Atalante. Cela mérite d'être souligné, car cela suppose, de la part des équipages et des équipes scientifiques, un effort particulier. L'Atalante, qui a parcouru pendant ces douze mois plus de 56000 milles nautiques dans le Pacifique, a accompli des travaux remarquables, tant au point de vue scientifique qu'économique. La campagne PACANTARCTIC qui l'a conduite au cercle polaire Sud, et les campagnes ZONECO et ZEEPOLYF sont, à cet égard, significatives. [OCR NON CONTRÔLE]
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/1996/rapport-4926.pdf

Capacité de survie des streptocoques fécaux  en eau de mer traitée
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fauvel, Yves.
To our knowledge, no specific study has ever been carried out on these germs' survival capacity, in treated sea water. From a practical point of view, this question is of great importance. Should we, indeed, consider a type of sea water as acceptable for shellfish purification, based only on Escherichia coli disappearance?This is the reason why we conducted, in vitro, a number of experiments on the survival capacity of fecal streptococci and Escherichia coli in treated sea water.
Tipo: Text
Ano: 1967
URL: http://archimer.ifremer.fr/doc/1967/publication-3778.pdf

L'induction hormonale de la ponte à l'aide de la LH-RH chez l' ombrine, Sciaenops ocellatus. Mise en évidence des conditions optimales pour la production d'oeufs et de larves de qualité
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gardes, Lionel.
20 and 50 µg.kg·1 doses of [D Trp6] LH-RHa analogue proved to be effective in inducing and synchronising spawns in red drum, Sciaenops ocellatus, in the French West Indies tropical conditions. The study of oocyte development through steady ovarian biopsies allowed to carry out injections at different stages. The influence of female ovarian development state at stimulation time on further development is shown. Phase C of germinal vesicle migration stage was identified as an optimum for successful stimulations. An interesting potential of successive stimulations leading to good quality spawns is established and the factors of success identified. The present work shows the  nterest of combined use of multivariate analyses and one way analyse of variance for...
Tipo: Text
Palavras-chave: Induction de ponte; LH-RH analogues; Analyse mutivariée; Qualité des oeufs; Développement ovarien; Ombrine; Sciaenops ocellatus; Induced breeding; LH-RH analogues; Mutivariate analysis; Egg quakity; Ovarian development; Red drum; Sciaenops ocellatus.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00425/53672/54512.pdf

Une espèce nouvelle d'ascarophis (Nematoda, cystidicolinae) parasite de phycis blennioides (brünnich) gadidé
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Petter, Annie J.
Ascarophis collaris n. sp. from Phycis blennioides (BRUNNICH) is described. It is caracterized by a cephalic hood forming a collarette at its posterior margin.
Tipo: Text
Ano: 1970
URL: http://archimer.ifremer.fr/doc/1970/publication-3140.pdf

Novel observations underlying the fast growth of suspension-feeding shellfish in turbid environments: Mytilus edulis
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hawkins, Ajs; Smith, Rfm; Bayne, Bl; Heral, Maurice.
For the tirst time for any benthic filter-feeder, this study documents each component process of nutrient acquisition through natural tidal variations of food availabillty. The organic content of seston available during both neap and spring tides in the bay of Marennes-Oléron. France, decreased from 28 to 8 % with mcreasing seston concentration from 10 to about 90 mg total particulate mass 1(1). Throughout this tidal variation, the blue mussel Mylilus edulis L. cleared more water of particles as seston availability increased. Rejection of fillered material as pseudofaeces prior to ingestion remained a constant fraction of about 0 .93 x the mass of filtered material, so that ingestion rate showed no signs of stabilising at even the highest food...
Tipo: Text
Palavras-chave: Seston composition; Tidal variation; Mussel; Mytilus edulis; Feeding behaviour; Selection efficiency; Absorption efficiency; Net energy balance.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00040/15080/12419.pdf

Passage d'une onde interne solitaire sur un seuil d'après les modèles analytiques de Djordjevic-Redekoppe et de Kabbaj
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kabbaj, A; Zhang, Xr.
Tipo: Text
Ano: 1988
URL: http://archimer.ifremer.fr/doc/00106/21761/19335.pdf

L'ombrine subtropicale ... une espèce pour l'aquaculture de demain ...
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Soletchnik, Patrick; Goyard, Emmanuel; Thouard, Emmanuel.
L'aquaculture en Martinique commence dans les années 1970 avec le transfert technologique de l'élevage de la chevrette : Macrobrachium rosenbergii. Au début des années 1980, le CNEXO en collaboration avec une association régionale (ADAM) travaille aux Antilles à la sélection d'espèces tropicales de poissons. Cette étude s'inserre alors dans un programme international de sélection d'espèces tropicales, coordonné par le Centre Océanologique du Pacifique. En début d'année 1987, après une étude prospective d'investigation aux USA, L'IFREMER Martinique initie le programme d'étude de la mise au point technique de l'élevage de l'ombrine en conditions intensives ...
Tipo: Text
Ano: 1991
URL: https://archimer.ifremer.fr/doc/00509/62116/66309.pdf

Atmospheric storm surge modeling methodology along the French (Atlantic and English Channel) coast
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Muller, Heloise; Pineau-guillou, Lucia; Idier, Deborah; Ardhuin, Fabrice.
Storm surge modeling and forecast are the key issues for coastal risk early warning systems. As a general objective, this study aims at improving high-frequency storm surge variations modeling within the PREVIMER system (www.previmer.org), along the French Atlantic and English Channel coasts. The paper focuses on (1) sea surface drag parameterization and (2) uncertainties induced by the meteorological data quality. The modeling is based on the shallow-water version of the model for applications at regional scale (MARS), with a 2-km spatial resolution. The model computes together tide and surge, allowing properly taking into account tide-surge interactions. To select the most appropriate parameterization for the study area, a sensitivity analysis on sea...
Tipo: Text
Palavras-chave: Storm surge; MARS; Sea surface drag; Meteorological forcing.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00219/32982/31404.pdf

On the coupling of wave and three-dimensional circulation models: Choice of theoretical framework, practical implementation and adiabatic tests
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bennis, Anne-claire; Ardhuin, Fabrice; Dumas, Franck.
Many theoretical approaches and implementations have been proposed for the coupling of the three-dimensional ocean circulation with waves. The theoretical models are reviewed and it is shown that the formulation in terms of the quasi-Eulerian velocity circumvents the essential difficulty of alternative formulations for the Lagrangian mean velocity. Namely, models based on this Lagrangian velocity require an estimation of wave-induced motions to first order in the horizontal gradients of the wave field in order to estimate the vertical flux of wave pseudo-momentum. So far, only three-dimensional wave models have been able to provide these estimates, and all published theories based on the simpler Airy theory are not consistent at the leading order, because...
Tipo: Text
Palavras-chave: Wave-current coupling; Radiation stresses; MARS3D; WAVEWATCH III.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00056/16705/14198.pdf

Filets soulevés. Occitanie. 2018. Observation des Marées au débarquement - OBSDEB
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public. Ces indicateurs intègrent...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00596/70856/69089.pdf

Modélisation de la distribution d’espèces benthiques par l’utilisation d’une plateforme multi-agents
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Razafimahefa, Ntsoa Rakoto.
In a context of climate change, understanding the response of species to changes in the environment and the implications for their geographic distribution is paramount. Species distribution models (SDM), through the formulation of relationships between the organism and its environment, provide a tool to explore species response to different types of environmental stresses. This study presents the development and a first application of a mechanistic and generic SDM, using a multi-agent modelling platform: NetLogo. The model allows to simulate the spatialized population dynamic of a bentho-pelagic species, in response to environmental variations. The model developed is an individual-based (IBM) mechanistic model, which incorporates a DEB (Dynamic Energy...
Tipo: Text
Palavras-chave: Modèle de distribution d’espèce; Mytilus edulis; Dynamic Energy Budget; Connectivité; Recrutement; Compétition spatiale; Scénario de changement climatique; Species distribution model; Mytilus edulis; Dynamic Energy Budget; Connectivity; Recruitment space-limited recruitment; Climate change scenario.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00405/51631/52187.pdf

Preliminary Analysis of Chinese GF-3 SAR Quad-Polarization Measurements to Extract Winds in Each Polarization
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ren, Lin; Yang, Jingsong; Mouche, Alexis; Wang, He; Wang, Juan; Zheng, Gang; Zhang, Huaguo.
This study analyzed the noise equivalent sigma zero (NESZ) and ocean wind sensitivity for Chinese C-band Gaofen-3 (GF-3) quad-polarization synthetic aperture radar (SAR) measurements to facilitate further operational wind extraction from GF-3 data. Data from the GF-3 quad-polarization SAR and collocated winds from both NOAA/NCEP Global Forecast System (GFS) atmospheric model and National Data Buoy Center (NDBC) buoys were used in the analysis. For NESZ, the co-polarization was slightly higher compared to the cross-polarization. Regarding co-polarization and cross-polarization, NESZ was close to RadarSAT-2 and Sentinel-1 A. Wind sensitivity was analyzed by evaluating the dependence on winds in terms of normalized radar cross-sections (NRCS) and polarization...
Tipo: Text
Palavras-chave: Gaofen-3; Synthetic aperture radar; Quad-polarization; Ocean surface wind; Noise equivalent sigma zero; Geophysical model function; Polarization ratio; Polarization difference.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00420/53104/54059.pdf

Long distance particle transport to the central Ionian Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Berline, Léa; Doglioli, Andrea Michelangelo; Petrenko, Anne; Barrillon, Stéphanie; Espinasse, Boris; Le Moigne, Frederic A. C.; Simon-bot, François; Thyssen, Melilotus; Carlotti, François.
In the upper layers of the Ionian Sea, young Mediterranean Atlantic Waters (MAW) flowing eastward from the Sicily channel meet old MAW. In May 2017, during the PEACETIME cruise, fluorescence and particle content sampled at high resolution revealed unexpected heterogeneity in the central Ionian. Surface salinity measurements, together with altimetry-derived and hull-mounted ADCP currents, describe a zonal pathway of AW entering the Ionian Sea, consistent with the so-called cyclonic mode in the North Ionian Gyre. The ION-Tr transect, located ~19–20° E–~36° N turned out to be at the crossroad of three water masses, mostly coming from the west, north and from an isolated anticyclonic eddy northeast of ION-Tr. Using Lagrangian numerical simulations, we suggest...
Tipo: Text
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00677/78886/81182.pdf

Sea surface temperature variability in the central-western Mediterranean Sea during the last 2700 years: a multi-proxy and multi-record approach
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cisneros, Merce; Cacho, Isabel; Frigola, Jaime; Canals, Miquel; Masque, Pere; Martrat, Belen; Casado, Marta; Grimalt, Joan O.; Pena, Leopoldo D.; Margaritelli, Giulia; Lirer, Fabrizio.
This study presents the reconstructed evolution of sea surface conditions in the central-western Mediterranean Sea during the late Holocene (2700 years) from a set of multi-proxy records as measured on five short sediment cores from two sites north of Minorca (cores MINMC06 and HER-MC-MR3). Sea surface temperatures (SSTs) from alkenones and Globigerina bulloides Mg / Ca ratios are combined with δ18O measurements in order to reconstruct changes in the regional evaporation–precipitation (E–P) balance. We also revisit the G. bulloides Mg / Ca–SST calibration and re-adjusted it based on a set of core-top measurements from the western Mediterranean Sea. Modern regional oceanographic data indicate that Globigerina bulloides Mg / Ca is mainly controlled by...
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00333/44460/44137.pdf

Spatial variation of total CO2 and total alkalinity in the northern Indian Ocean: A novel approach for the quantification of anthropogenic CO2 in seawater
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Goyet, C; Coatanoan, Christine; Eischeid, G; Amaoka, T; Okuda, K; Healy, R; Tsunogai, S.
As part of a cooperative effort of the Joint Global Ocean Flux Study (JGOFS) and of the World Ocean Circulation Experiment (WOCE) program, we have measured total CO2 (TCO2) and total alkalinity (TA) along three sections in the northern Indian Ocean. One section through the Gulf of Aden to the Arabian Sea is parallel to the coast of Yemen. One section is across the Arabian Sea along the nominal 9N latitude and the other section is across the Bay of Bengal along the nominal 10N latitude. The measurements were performed on board RN Knorr in September-October 1995. The primary purpose of this work is to understand the penetration of anthropogenic CO2 along these ocean sections. Here, we present a novel approach to the calculation of anthropogenic CO2 in the...
Tipo: Text
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00172/28367/26655.pdf

Rapport d'Activité 1999, Laboratoire DRV-RH Lorient
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
L'importance de la pêche hauturière en Bretagne Sud explique l'accent mis par le laboratoire sur le suivi des stocks soumis à quotas du plateau continental. Cependant, l'obtention de financements régionaux dans le cadre des Contrats de Plan Etat - Région témoigne de la nécessité pour l'Ifremer de prendre en compte, grâce à sa structuration en laboratoires côtiers les problèmes halieutiques dans la bande côtière, dans la mesure des moyens disponibles.  Les laboratoires RH de Lorient et de Brest ont entrepris depuis quelques années avec l'aide de la Région Bretagne une étude des activités halieutiques dans la bande côtière. Après l'acquisition des connaissances indispensables sur les flottilles et leurs activités, ainsi que sur les ressources côtières et...
Tipo: Text
Palavras-chave: Bretagne sud; Bande côtière; SIH; Activité des flottilles; Mesures de gestion; Diagnostic sur l'état de la ressource; Avis et expertises; Recherche; Recueil et archivage.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/rapport-2573.pdf

Bulletin d'information PREVIMER - Informations et analyses des eaux côtières. Juin Juillet Août 2008 - n°3
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Equipe projet PREVIMER.
Sommaire * Les objectifs............................2 * Les moyens d’observations et de prévisions de l’état des mers côtières....................................2 * Météo et débits des fleuves...4 * Circulation et masses d’eau côtières....................................5 * Production biologique............10 * Les faits marquants................13 * Glossaire..................................13
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00242/35355/33856.pdf

Trophic interactions in the coastal ecosystem of Sri Lanka: An ECOPATH preliminary approach
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Haputhantri, S; Villanueva, Ching-maria; Moreau, J.
This study attempts to assemble and summarize existing information in order to build a general representation of the trophic interactions within the shallow coastal ecosystem of Sri Lanka. A multispecific ecosystem-based approach on trophic relationships and their possible variations was performed using ECOPATH. Thirty-nine functional groups were considered representing all trophic levels in the food web.   Time-dynamic simulation was carried out using the ECOSIM routine to evaluate the impact of the 1998 El Nino event on key functional groups. Results show that the time needed for any impacted functional group to recover to its initial abundance increased with the trophic level. Two time-series data sets derived from commercial catch and effort statistics...
Tipo: Text
Palavras-chave: Sri Lanka; Indian Ocean; Fisheries management; Feeding relationships; Trophic level; ECOSIM; ECOPATH; Trophic modelling.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-3892.pdf

Modélisation des turbidités en Bretagne sud et validation par des mesures in situ
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tessier, Caroline; Le Hir, Pierre; Dumas, Franck; Jourdin, F.
A hydrodynamic and sediment model of South Brittany is calibrated with ADCP measurements, which allow to estimate hydrodynamic forcing and concentration of suspended particulate matter. The exercise of comparison between observed and simulated concentrations reveals that turbidity is highly dependant on numerous strongly coupled sedimentary and physical processes.
Tipo: Text
Palavras-chave: Waves; ADCP; Acoustical backscattering; Modelisation; Turbidity; Vagues; ADCP; Rétrodiffusion acoustique; Modélisation; Turbidité.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-6300.pdf

Observed and projected Sea Surface Temperature seasonal changes in the Western English Channel from satellite data and CMIP5 multi-model ensemble.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: L'Heveder, Blandine; Speich, Sabrina; Ragueneau, Olivier; Gohin, Francis; Bryere, Philippe.
Seasonal Sea Surface Temperature (SST) changes in the Western English Channel have been estimated for the previous decades from high-resolution satellite data. Coastal seas, well separated from offshore waters by intense frontal structures, show colder SST by 1 to 2°C in summer. A significant warming trend is observed in the autumn season. This positive trend is stronger offshore, with an annual mean SST increase of 0.32°C/decade, but weaker in coastal waters (0.23°C/decade), where strong vertical mixing induced by tides and winds acts to reduce surface warming. The performance of an ensemble of CMIP5 climate model in simulating recent seasonal changes of SST in the region is estimated. The median of CMIP5 models reproduces very well the observed SST mean...
Tipo: Text
Palavras-chave: SST; Climate change; Western English Channel; CMIP5; Regional study.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00350/46163/45861.pdf

Département Haute-Corse. 2018. Activité des navires de pêche.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d’Informations Halieutiques » (SIH) de l’Ifremer, qui constitue le réseau d’observation des ressources halieutiques et des usages associés. Ce projet s’inscrit dans la mission de service d’intérêt public de l’Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l’analyse du secteur des pêches, le SIH a en charge l’élaboration d’indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche et du grand public.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00608/72001/70705.pdf

Tortues marines. Sous-région marine Mers celtiques. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Claro, Françoise; De Massary, Jean-christophe.
Tipo: Text
Palavras-chave: Mers celtiques; Tortues marines; Espèces; Distribution.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00328/43951/43524.pdf

First records of dusky grouper Epinephelus marginatus settlement-stage larvae in the Ligurian Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Faillettaz, Robin; Gilletta, Laurent; Petit, Franck; Francour, Patrice; Irisson, Jean-olivier.
The presence of dusky grouper Epinephelus marginatus settlement-stage larvae in the Ligurian Sea is reported. Epinephelus marginatus populations are slowly recovering along the french Mediterranean coast since the establishment of a moratorium on spearfishing in 1993 but still remain spatially restricted to marine protected areas. The occurrence of Epinephelus marginatus larvae in a region where effective settlement had not been detected for decades is a new observation supporting the species’ recovery.
Tipo: Text
Palavras-chave: Epinephelus marginatus; Epinephelidae; Settlement-stage larvae; Ligurian Sea; NW Mediterranean Sea.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00634/74622/74514.pdf

Recherche de méthodes analytiques rapides et objectives - Méthodes pour déterminer la fraîcheur du poisson dans la recherche et l'industrie
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Tipo: Text
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00058/16970/14475.pdf

Divergence genetique de quelques populations naturelles de Cepaea nemoralis et Cepaea hortensis en France
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guiller, A; Madec, L.
Electrophoretic analysis of eight polymorphic loci in 23 mixed or monospecific populations of Cepaea nemoralis and Cepaea hortensis indicates important genetic dissimilarities between Breton and Pyrenean areas. The concordance between groups of samples and various latitudinal or altitudinal zones suggests that the influence of climatic factors could be involved. Founder effects also seem to increase the differentiation in some populations; the lower genetic variability in three pyrenean samples probably submitted to frequent extinctions could illustrate this process. Nevertheless, divergences corresponding to plurispecific samples suppose the absence of interactions between the two species.
Tipo: Text
Palavras-chave: Mollusca; Cepaea hortensis; Cepaea nemoralis; Climate; Electrophoresis; Natural populations; Genetics.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/acte-1714.pdf

Étude sur le développement larvaire de Crassostrea gigas (Thunberg, 1793) en conditions contrôlées : recherche d’indices de qualité
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ben Kheder, Rym.
Dans le présent travail, nous nous proposons d’étudier cet indice par coloration spécifique des lipides et de traiter les résultats par analyse d’images. Nous tenterons de quantifier les lipides de réserve apparaissant sous forme de gouttelettes colorées dans les larves et de préciser leur évolution au cours du développement larvaire. Un indice lipidique global sera alors déterminé comme étant le rapport de la surface de l’image occupée par les lipides à la surface totale de la larve. Une relation sera recherchée entre cet indice et la totalité ou une partie des descripteurs du développement larvaire. D’autre part, et afin d’estimer la qualité des larves, le développement larvaire de Placopecten magellanicus a été étudié en relation avec l’évolution du...
Tipo: Text
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00033/14450/11750.pdf

Detection and analysis of unusual events in long-term zooplankton and nekton data sets from North Inlet Estuary, South Carolina, USA
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Allen, Dm; Edwards, D; Feller, Rj; Hutchinson, Se; Ogburnmatthews, V.
Unusual events and disturbances are important sources of variability in ecological data sets, but methods for their detection and analysis are not readily available. We have adapted widely-used quality control methods to identify and quantify unusual events in ten-year-long data sets from the relatively pristine North Inlet Estuary, South Carolina, USA.-Seasonal patterns and long-term trends were first removed from biweekly zooplankton and nekton abundance and corresponding water temperature and salinity data using nonparametic smoothing algorithms. The Shewhart Control Chart Method, a quantitative technique used for quality control in industrial manufacturing processes, was used to define four types of events according to intensity and duration....
Tipo: Text
Palavras-chave: Zooplankton; Nekton; Estuary; Long-term; Disturbance.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00093/20389/18056.pdf

Experimental study of the near-field impact of an oyster table on the flow
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kervella, Youen; Germain, Gregory; Gaurier, Benoit; Facq, Jean-valery; Cayocca, Florence; Lesueur, Patrick.
Oyster farming structures are artificial obstacles which disturb tidal flow and wave propagation. These effects can induce modifications of erosion and sedimentation patterns, turbidity changes, local silting up and can be threatening for the shellfish farming itself. The understanding of the impact of these structures in terms of hydrodynamics and sediment dynamics in the far-field, i.e. at the scale of a bay, is a very challenging task. In order to investigate the far-field impact, it is very important to understand in the first place all the changes which occur at a smaller scale, i.e. at the scale of a single table for a farm consisting of oyster tables made of metallic wire structures on which porous bags of oysters are laid. This work is carried out...
Tipo: Text
Palavras-chave: Sediment dynamics; Roughness length; Boundary layer; Particle Image Velocimetry; Laser Doppler Velocimetry; Flume; Oyster table.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/2010/publication-7389.pdf

Otolithes (faces concave et convexe) des poissons de Manche orientale
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mahe, Kelig.
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00020/13101/10113.pdf

Trace-metals in the eastern part of the north-sea .1. analyses and short-term distributions
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Baeyens, W; Gillain, G; Decadt, G; Elskens, I.
Tipo: Text
Ano: 1987
URL: http://archimer.ifremer.fr/doc/00109/22067/19709.pdf

Production d’énergie. Sous-région marine Manche - Mer du Nord. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kalaydjian, Regis.
Tipo: Text
Palavras-chave: Manche; Mer du Nord; Production d'énergie; Coûts; Réglementation; Interaction avec le milieu.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00328/43893/43466.pdf

La pêche du merlu au filet maillant sur les côtes françaises de l'Atlantique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Quero, Jean-claude.
Au cours de l'année 1966, une nouvelle technique s'est développée le long des côtes françaises de l'Atlantique : la pêche du merlu au filet maillant ou filet droit. Pendant les premiers mois, ses rendements, bien supérieurs à ceux du chalut, lui ont attiré un grand nombre d'artisans dans presque tous les ports du golfe de Gascogne. Cette évolution rapide a provoqué des réactions diverses dans le monde de la pêche, en particulier de violentes critiques de la part des tenants des techniques traditionnelles.  Les deux arguments invoqués le plus souvent étaient les suivants : le filet maillant achève l'oeuvre des arts traînants en allant capturer sur les fonds inaccessibles aux chalutiers, les derniers reproducteurs qui s'y sont réfugiés ; en cas de perte (et...
Tipo: Text
Ano: 1968
URL: http://archimer.ifremer.fr/doc/1968/publication-7279.pdf

Arsenic in marine sediments from French Mediterranean ports: Geochemical partitioning, bioavailability and ecotoxicology
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mamindy-pajany, Yannick; Hurel, Charlotte; Geret, Florence; Galgani, Francois; Battaglia-brunet, Fabienne; Marmier, Nicolas; Romeo, Michele.
This work investigates arsenic mobility, bioavailability and toxicity in marine port sediments using chemical sequential extraction and laboratory toxicity tests. Sediment samples were collected from two different Mediterranean ports, one highly polluted with arsenic and other inorganic and organic pollutants (Estaque port (EST)), and the other one, less polluted, with a low arsenic content (Saint Mandrier port (SM)). Arsenic distribution in the solid phase was studied using a sequential extraction procedure specifically developed for appraising arsenic mobility in sediments. Toxicity assessment was performed on sediment elutriates, solid phases and aqueous arsenic species as single substance using the embryotoxicity test on oyster larvae (Crassostrea...
Tipo: Text
Palavras-chave: Arsenic speciation; Chemical sequential extraction; Embryo-toxicity test; Marine sediment; Microtox toxicity test; Pollutant bioavailability.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00127/23820/22580.pdf

Palangres. Martinique. 2019. Observation des Marées au débarquement - OBSDEB
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public. Ces indicateurs intègrent...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00646/75850/76846.pdf

Disrupting data sharing for a healthier ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pendleton, Linwood H; Beyer, Hawthorne; Estradivari,; Grose, Susan O; Hoegh-guldberg, Ove; Karcher, Denis B; Kennedy, Emma; Llewellyn, Lyndon; Nys, Cecile; Shapiro, Aurélie; Jain, Rahul; Kuc, Katarzyna; Leatherland, Terry; O’hainnin, Kira; Olmedo, Guillermo; Seow, Lynette; Tarsel, Mick; Blasiak, Robert.
Ocean ecosystems are in decline, yet we also have more ocean data, and more data portals, than ever before. To make effective decisions regarding ocean management, especially in the face of global environmental change, we need to make the best use possible of these data. Yet many data are not shared, are hard to find, and cannot be effectively accessed. We identify three classes of challenges to data sharing and use: uploading, aggregating, and navigating. While tremendous advances have occurred to improve ocean data operability and transparency, the effect has been largely incremental. We propose a suite of both technical and cultural solutions to overcome these challenges including the use of natural language processing, automatic data translation,...
Tipo: Text
Palavras-chave: Combinatorial machine; Collaboration; Data aggregation; Data sharing; Data uploading; Ocean conservation.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00500/61162/64743.pdf

The Biomphalaria glabrata DNA methylation machinery displays spatial tissue expression, is differentially active in distinct snail populations and is modulated by interactions with Schistosoma mansoni
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Geyer, Kathrin K.; Niazi, Umar H.; Duval, David; Cosseau, Celine; Tomlinson, Chad; Chalmers, Iain W.; Swain, Martin T.; Cutress, David J.; Bickham-wright, Utibe; Munshi, Sabrina E.; Grunau, Christoph; Yoshino, Timothy P.; Hoffmann, Karl F.
Background The debilitating human disease schistosomiasis is caused by infection with schistosome parasites that maintain a complex lifecycle alternating between definitive (human) and intermediate (snail) hosts. While much is known about how the definitive host responds to schistosome infection, there is comparably less information available describing the snail's response to infection. Methodology/Principle findings Here, using information recently revealed by sequencing of the Biomphalaria glabrata intermediate host genome, we provide evidence that the predicted core snail DNA methylation machinery components are associated with both intra-species reproduction processes and inter-species interactions. Firstly, methyl-CpG binding domain protein...
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00389/50000/71812.pdf

Impact of 4D-variational assimilation of WOCE hydrography on the meridional circulation of the Indian Ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ferron, Bruno; Marotzke, Jochem.
World Ocean Circulation Experiment (WOCE) hydrographic sections and a sea-surface climatology are combined with a ocean general circulation model through a 4D-variational method to analyze the meridional overturning of the Indian Ocean. The regional model is run with realistic surface forcings over year 1995 for which most of WOCE Indian Ocean sections were made. The assimilation controls the initial temperature and salinity fields, surface forcings and open-boundary velocities, temperature and salinity. When no observations are assimilated, the model shows that the deep (below 1000 m) meridional overturning is weak compared to observation-based estimates. This is a common feature of general circulation models. In contrast, after the assimilation, the...
Tipo: Text
Palavras-chave: Overturn; Oceanographic surveys; Hydrographic data; Ocean circulation.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/publication-582.pdf

Captures accidentelles. Sous-région marine Méditerranée occidentale. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Morizur, Yvon; Valéry, Loïc; Claro, Françoise; Van Canneyt, Olivier.
Tipo: Text
Palavras-chave: Méditerranée; Captures accidentelles; Programmes d'observation; Mammifères marins; Tortues marines; Oiseaux.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00331/44250/43819.pdf

Rapid neodymium release to marine waters from lithogenic sediments in the Amazon estuary
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rousseau, Tristan C. C.; Sonke, Jeroen E.; Chmeleff, Jerome; Van Beek, Pieter; Souhaut, Marc; Boaventura, Geraldo; Seyler, Patrick; Jeandel, Catherine.
Rare earth element (REE) concentrations and neodymium isotopic composition (epsilon Nd) are tracers for ocean circulation and biogeochemistry. Although models suggest that REE release from lithogenic sediment in river discharge may dominate all other REE inputs to the oceans, the occurrence, mechanisms and magnitude of such a source are still debated. Here we present the first simultaneous observations of dissolved (&lt; 0.45 mu m), colloidal and particulate REE and eNd in the Amazon estuary. A sharp drop in dissolved REE in the low-salinity zone is driven by coagulation of colloidal matter. At mid-salinities, total dissolved REE levels slightly increase, while epsilon Nd values are shifted from the dissolved Nd river endmember (- 8.9) to values typical of...
Tipo: Text
Palavras-chave: Earth sciences; Biogeochemistry; Oceanography.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00298/40952/40046.pdf

Inventaire des plantes introduites en Méditerranée : origines et répercussions sur l'environnement et les activités humaines
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Verlaque, M.
This review addresses the problem of recently introduced plants in the Mediterranean in order to analyse their vectors, the dispersal processes and the possible ecological and economic consequences. Ninety-five cases (94 macroscopic algae and one seagrass) are listed and discussed. Three major routes of access into the Mediterranean are indicated: shipping, the Suez canal and aqua-culture. The recent introduction of Caulerpa taxifolia along our coasts has called attention to a new potential source: aquaria. Among the successful acclimatizations, cold-temperate Pacific and Atlantic species remain confined to the north of the Mediterranean (Gulf of Lions, Adriatic), whereas some tropical or sub-tropical plants colonize large areas. Some introduced algae...
Tipo: Text
Palavras-chave: MEDITERRANEAN; INTRODUCED SPECIES; MARINE ALGAE; SEAGRASSES; ECOLOGICAL AND ECONOMIC CONSEQUENCES.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00098/20879/18493.pdf

Cinétiques de décontamination en milieu contrôlé de moules toxiques (Diarrheic Shellfish Poison). Premiers résultats
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bardouil, Michele; Masselin, Pierre; Bohec, Madeleine.
Laboratory assays have been performed, using mussels contamined with Dinophysis, in order to assess potential depurations kinetics. Mussels samples from Seine bay, Douarnenez bay and Vilaine bay have been tested . From these assays, which are to be performed in 1989; two main results are stressed : 1) when the toxicity level is near 0,5 MU/g of hepatopancreas*, depuration is undedectable during twelve days, 2) when the toxicity level exceeds 1 MU/g,depuration is important during the first eight days. *(quarantine level used by Japanese authorities) .
Tipo: Text
Palavras-chave: Moules; DSP; Dinophysis; Décontamination; Blue mussels; DSP; Dinophysis; Depuration.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00430/54148/55479.pdf

Dossier d'observation à bord des navires de pêche
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Badts, Vincent; Peronnet, Isabelle; Tetard, Alain; Gaudou, Olivier.
Formulaire d'enregistrement des données observées à bord des navires de pêche commerciaux.
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00018/12896/9856.pdf

Etude expérimentale de la croissance des moules Mytilus edulis en Bretagne, de mars 1995 à janvier 1996
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Chanjour, Regis.
L'étude fait suite à celle menée entre avril 1994 et janvier 1995. Elle consiste à comparer la croissance d'échantillons de moules Mytilus edulis élevées dans des enceintes expérimentales appelées "pochons" (mini-poches plastiques), et disposées dans différents secteurs. Deux sites mytilicoles reconnus, Le Vivier-sur-Mer en Bretagne nord, et Pénestin en Bretagne sud, servent de témoins par rapport à la Rade de Brest qui est évaluée dans le cadre d'un programme mis en place par la Communauté Urbaine de Brest. Au terme des neuf mois d'étude (d'avril 1995 à janvier 1996), les taux de survie observés sur sites sont hétérogènes. Le Vivier-sur-Mer présente la meilleure survie (86%) à l'inverse de l'Elorn (80% de mortalité) ; la survie observée sur les autres...
Tipo: Text
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00426/53781/54676.pdf

Validation of the TOPEX rain algorithm: Comparison with ground-based radar - art. no. 4038
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mcmillan, A; Quartly, G; Srokosz, M; Tournadre, Jean.
[1] Recently developed algorithms have shown the potential recovery of rainfall information from spaceborne dual-frequency altimeters. Given the long mission achieved with TOPEX and the prospect of several other dual-frequency altimeters, we need to validate the altimetrically derived values so as to foster their integration with rain information from different sensors. Comparison with some alternative climatologies shows the bimonthly means for TOPEX to be low. Rather than apply a bulk correction we investigate individual rain events to understand the cause of TOPEX's underestimation. In this paper we compare TOPEX with near-simultaneous ground-based rain radars based at a number of locations, examining both the detection of rain and the quantitative...
Tipo: Text
Palavras-chave: Attenuation; Validation; Rain; Satellite remote sensing; TOPEX.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/publication-695.pdf

Le cervelet des poissons: variations morphologiques du paleocerebellum en relation avec le développement musculaire et l'activité motrice chez quelques Sélaciens et Téléostéens
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Quignard, Jean-pierre.
In Selacians, cerebellum is made of archicerebellar parts: auricles, cerebellar crest, and a paleocerebellar part: cerebellum's main part. In Teleosts archicerebellum is made of granular eminences, the cerebellar crest, the cerebellar valve and the paleocerebellar, cerebellum's main part. The main part of cerebellum (paleocerebellum), which is the main focus of this note, is a mass, more or less voluminous, formed by a dorsal evagination emanating from the metacoele, totally or partly filled with granular masses.
Tipo: Text
Ano: 1967
URL: http://archimer.ifremer.fr/doc/1967/publication-3864.pdf

Gill chamber and gut microbial communities of the hydrothermal shrimp Rimicaris chacei Williams and Rona 1986: A possible symbiosis
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Apremont, Vincent; Cambon-bonavita, Marie-anne; Cueff-gauchard, Valerie; Francois, David; Pradillon, Florence; Corbari, Laure; Zbinden, Magali.
Rimicaris chacei Williams and Rona 1986, formerly named as Chorocaris chacei, is a caridean shrimp living in deep-sea hydrothermal ecosystems. This shrimp is endemic to the Mid Atlantic Ridge (MAR) and lives at the periphery of aggregates of its well-known congeneric R. exoculata Williams and Rona 1986. Contrasting with the very dense and mobile clusters formed by R. exoculata, R. chacei lives in small groups of several individuals that are not very mobile. Although devoid of the characteristic hypertrophied cephalothorax of R. exoculata, which harbors the ectosymbionts, a microbial community has also been reported in the cephalothorax of R. chacei. Previous data on morphology, behavior and isotopic values indicate a diet based on a combination of feeding...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00465/57680/59880.pdf

Contribution a l'etude de l'endettement en peche artisanale. la cas de la flotte de Lorient.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Goff, Pierre-yves.
At the end of the Second World War, a process of modifications to the production framework of the small fishing business sector began. This reorganising of the sector was oriented towards capital deepening, thus bringing on a change of the weight of various production factors. In fact, while the number of ships and sailors was decreasing, the power, size and gear of the small boats were increasing. The landed amounts lagged, even if a qualitative change in intake appeared, which brought, along with rising demand, an increase in current francs of the landings' value (MEURIOT, 1987).  This technical evolution of the ships was largely helped by the effect of successive changes in the financing of production units and the effect of the positive changes of the...
Tipo: Text
Palavras-chave: SEM.
Ano: 1988
URL: http://archimer.ifremer.fr/doc/1988/rapport-2427.pdf

Impact potentiel du fer présent dans les rejets urbains sur les blooms phytoplanctoniques
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lassus, Patrick; Le Dean, Loic.
Le traitement des effluents urbains au chlorure ferrique à la station de Toulon produit au rejet des teneurs en fer excédant largement les valeurs moyennes en eau de mer. Une incidence potentielle sur le phytoplancton d'eau rouge a été envisagée, et en particulier sur Prorocentrum minimum, espèce dont les blooms sont de plus en plus fréquents sur le littoral méditerranéen. Des sels ferreux et ferriques à degré de solubilité variable en eau de mer ont été testés sur la croissance de cet organisme. Toutes les formes expérimentées améliorent considérablement la croissance par rapport à une eau de mer carencée en fer, en particulier le citrate ferrique. L'espèce étudiée semble pouvoir être considérée comme "0pportuniste" compte tenu de sa capacité à utiliser...
Tipo: Text
Ano: 1987
URL: http://archimer.ifremer.fr/doc/00132/24330/22329.pdf

Synthèse des données par filtrage de Kalman, reconstruction des champs 4D sur la zone POMME. Analyses de référence
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gaillard, Fabienne; Kermabon, Catherine; Mercier, Herle.
We present here the reference analysis of the POMME datasaet obtained with the Kalman filter
Tipo: Text
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00283/39403/37848.pdf

Typologies et composantes des flottilles du sud du Golfe de Gascogne en 1986 - de Noirmoutier à Bayonne
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Decamps, Philippe; Leaute, Jean-pierre.
This document presents an analysis of the fishing fleet operating in the Southern Bay of Biscay, based on vessel characteristics and records of fishing activities during 1986, using multivariate ordination techniques. It reveals groups of vessels having similar fishing patterns with regard to utilization of various gears, areas fished and species caught. The results have potential interest for fisheries biologists, and also for economists and regional or national managers.
Tipo: Text
Palavras-chave: Typologie; Composantes; Flottilles; Golfe de Gascogne.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00266/37734/35748.pdf

Diversity and spatial distribution of amoA-encoding archaea in the deep-sea sediments of the tropical West Pacific Continental Margin
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dang, H.; Li, J.; Zhang, X.; Li, T.; Tian, F.; Jin, W.
The ecological characteristics of the deep-sea amoA-encoding archaea (AEA) are largely unsolved. Our aim was to study the diversity, structure and distribution of the AEA community in the sediments of the tropical West Pacific Continental Margin, to develop a general view of the AEA biogeography in the deep-sea extreme environment. Archaeal amoA clone libraries were constructed. Diverse and novel amoA sequences were identified, with the Bohol Sea, Bashi Strait and Sibuyan Sea harbouring the highest and the Bicol Shelf the lowest AEA diversity. Phylogenetic and statistical analyses illustrate a heterogeneous distribution of the AEA community, probably caused by the differential distribution of the terrestrial or estuarine AEA in the various sampling sites....
Tipo: Text
Palavras-chave: Ammonia-oxidizing archaea; AmoA-encoding archaea; Biogeography; Deep-sea sediment; Extremophile; Philippine Sea; Volcanic ash; West Pacific Continental Margin.
Ano: 2009
URL: https://archimer.ifremer.fr/doc/00220/33077/31534.pdf

Open-sea observatories: a new technology to bring the pulse of the sea to human awareness
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Puillat, Ingrid; Lanteri, Nadine; Drogou, Jean-francois; Blandin, Jerome; Geli, Louis; Sarrazin, Jozee; Sarradin, Pierre-marie; Auffret, Yves; Rolin, Jean-francois; Leon, Pierre.
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00079/19036/16619.pdf

Instability of the Mediterranean Water undercurrents southwest of Portugal: effects of baroclinicity and of topography
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cherubin, Laurent; Carton, Xavier; Paillet, Jerome; Morel, Yann; Serpette, Alain.
Southwest of Portugal, in situ data show that part of the mesoscale variability of the Mediterranean Water undercurrents is triggered by topographic effects (near capes and submarine canyons), and is driven by a dominantly baroclinic instability. The vertical alignment of these undercurrents observed at sites of eddy formation is indeed favorable to baroclinic instability. This instability is materialized by the formation of filaments and of small eddies in the Portimao canyon and of meddles near Cape Saint Vincent and near the Estramadura Promontory. Hydrological data and float trajectories reveal that these eddies have a baroclinic structure. Near Portimao canyon, the variation of the potential vorticity of the undercurrents again proves their...
Tipo: Text
Palavras-chave: Eau méditerranéenne; Sous-courants; Instabilité barocline; "meddies"; Atlantique nord-est; Mediterranean Water; Undercurrents; Baroclinic instability; Meddies; NE Atlantic.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00255/36632/35219.pdf

Short-term changes in particulate fluxes measured by drifting sediment traps during end summer oligotrophic regime in the NW Mediterranean Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Marty, J. C.; Goutx, M.; Guigue, C.; Leblond, N.; Raimbault, P.
Short-term changes in the flux of particulate matter were determined in the central north western Mediterranean Sea (near DYFAMED site) using drifting sediment traps at 200 m depth in the course of the DYNAPROC 2 cruise (14 September-17 October 2004). In this period of marked water column stratification, POC fluxes varied by an order of magnitude, in the range of 0.03-0.29 mgC m(-2) h(-1) over the month and showed very rapid and high variations. Particulate carbon export represented less than 5% of integrated primary production, suggesting that phytoplankton production was essentially sustained by internal recycling of organic matter and retained within the photic zone. While PON and POP fluxes paralleled one another, the elemental ratios POC/PON and...
Tipo: Text
Palavras-chave: Planktonic community structure; Flame ionization detection; Atlantic time series; Organic carbon flux; Deep ocean; Downward fluxes; Particle flux; Vertical flux; Lipid classes; Sargasso sea.
Ano: 2009
URL: https://archimer.ifremer.fr/doc/00210/32099/30556.pdf

Nature des fonds marins. Sous-région marine Manche - Mer du Nord. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Garlan, Thierry; Marchès, Élodie.
Tipo: Text
Palavras-chave: Manche; Mer du Nord; Nature des fonds marins; Sédimentologie; Évaluation de la connaissance.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00327/43818/43392.pdf

Surveillance écologique et halieutique. Site de Gravelines. Novembre 1989 - Octobre 1990
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Delesmont, Régis; Delesmont, Edith; Grossel, Hubert; Hitier, Benoist; Le Fevre-lehoerff, Geneviève; Woehrling, Daniel; Dewarumez, Jean-marie; Menu, Dominique.
Ce rapport de travail présente les résultats obtenus pour la période de novembre 1989 à octobre 1990 devant la centrale de Gravelines et correspond au 12ème rapport de surveillance. La surveillance écologique du site consiste à observer, en liaison avec les variations naturelles et celles dues au fonctionnement de la centrale, le milieu physique et biologique. Nous nous sommes attachés à déceler les changements qui peuvent intervenir dans la qualité et la biomasse des écosystèmes.
Tipo: Text
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00005/11603/8239.pdf

La mise en place de la gestion rationnelle d'un stock exploité : l'exemple du comité local des pêches maritimes (C.L.P.M.) de Blainville sur Mer et des fonds à Homard de la Côte Ouest du Cotentin
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Reveche, C.
In 1976, the Comité Local des Pêches Maritimes of Blainville-sur-Mer decided to set up a stock management of lobsters (Homarus gammarus) in regards with the decline of the catch. The differenT steps of the program are described.  The leading role of fishermen at every step is mentionned : creation of non-fishing areas, tagging, recapture, experimental fishing, sampling, logbooks, study of natural and artificial habitats.
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/publication-6047.pdf

Bilan 2004 du réseau REPAMO - Réseau national de surveillance zoosanitaire des mollusques marins
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Garcia, Celine; Arzul, Isabelle; Chollet, Bruno; Francois, Cyrille; Goubet, Anne; Joly, Jean-pierre; Miossec, Laurence; Robert, Maeva; Cuvelier, Nicolas; Lefebvre, Alain; Le Gagneur, Eric; Ropert, Michel; Mouillard, Gilbert; Gerla, Daniel; Le Gal, Dominique; Rocher, Gregory; Langlade, Aime; Bedier, Edouard; Nourry, Max; Martin, Jean-louis; Costantini, Louis; Masson, Jean-claude; Martin, Anne-genevieve.
Created in 1986, the REPAMO network (Network of mollusc pathology), is a national zoosanitary surveillance network of shellfish health status along the French coasts. Its activities are in keeping with two European Directives, 91 /67/EEC and 95/70/EC and are a patt of the institutional tasks ofIfremer. The aims of the network are to prevent the introduction and spread of exotic pathogens and to survey the evolution of notifiable pathogens already present in France. The network focused on the survey of listed diseases (bonamiosis and marteiliosis of flat oyster) in two areas under agreement process (Banc de Granville and zone X). In 2004, no sample couId be analysed to these two areas because of the difficulty to obtain flat oysters (sparse oyster beds,...
Tipo: Text
Palavras-chave: Réseau; Surveillance; Pathologie; Mollusques; Coquillages; Etat de santé; Network; Surveillance; Pathology; Molluscs; Shellfish; Health status.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/00086/19702/17343.pdf

Rapport d'activités Sextant 2014
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Satra Le Bris, Catherine; Meillon, Julien; Quimbert, Erwann.
Sextant est l'infrastructure de données géographiques marines et littorales de l'Ifremer, dont l’objectif est de gérer, diffuser et partager un catalogue de données relevant du milieu marin. Les données géographiques présentes sur Sextant sont issues des travaux de recherche et des programmes scientifiques des laboratoires de l'Ifremer et de ses partenaires. Répondant aux normes de l'ISO et aux standards de l'OGC, Sextant est un système interopérable avec les portails de diffusion de données géographiques nationaux et internationaux. Sextant propose trois services d’accès aux données : un service de recherche, un service de visualisation et un service de téléchargement. Ce rapport présente le bilan annuel des activités de Sextant, en matière de données,...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00267/37783/35858.pdf

Estimating turbidity and total suspended matter in the Adour River plume (South Bay of Biscay) using MODIS 250-m imagery
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Petus, Caroline; Chust, Guillem; Gohin, Francis; Doxaran, David; Froidefond, Jean-marie; Sagarminaga, Yolanda.
The Basque coastal waters (South Bay of Biscay) are directly influenced by the Adour River freshwater plume. The Adour outflow leads to important variations of suspended matter concentrations and turbidity, which in turn may affect biological productivity and water quality. This study aims at both developing specific algorithms and testing the efficiency of atmospherically corrected MODIS-Aqua 250-m surface reflectance product (MYD09) to map total suspended matter concentrations and turbidity within the Adour coastal region. First, regional empirical algorithms based on in-situ data were tested to retrieve the concentration of total suspended matter and turbidity from the remote sensing reflectance. Then, the respective sensitivity of MODIS surface...
Tipo: Text
Palavras-chave: Adour River plume; Turbidity; Suspended matter; Satellite sensing; MODIS; Remote sensing reflectance.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00003/11383/8042.pdf

Mathematical model and numerical simulations of the migration and growth of Biscay Bay anchovy early larval stages
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boussouar, Ahmed; Le Bihan, Soizick; Arino, Ovide; Prouzet, Patrick.
The paper presents a mathematical model of the early larval stage, from spawn to the resorption of the yolk-sac, of the anchovy, Engraulis encrasicolus, of the Bay of Biscay. The model describes the temperature-dependent growth and drift of passive larvae by the currents and vertical turbulence. A numerical code has been built and numerous simulations, fed by both biological (egg surveys by AZTI-San Sebastian, Spain, and IFREMER, France) and physical (circulation model by IFREMER-Brest, France) data, were undertaken. Their main features are presented and discussed here, and some conclusions on the possible utilization of the results in improving estimates of anchovy stocks by the daily egg production method are drawn.
Tipo: Text
Palavras-chave: Passive stage; Numerical simulation; Migration; Growth; Anchovy; Stade passif; Simulation numérique; Migration; Croissance; Anchois.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-518.pdf

Copolarized and Cross‐Polarized SAR Measurements for High‐Resolution Description of Major Hurricane Wind Structures: Application to Irma Category 5 Hurricane
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mouche, Alexis; Chapron, Bertrand; Knaff, John; Zhao, Yili; Zhang, Biao; Combot, Clement.
C‐Band high resolution radar (SAR) is the only space‐borne instrument able to probe at very high resolution and over all ocean basins the sea surface under extreme weather conditions. When co‐analyzed with Stepped Frequency Microwave Radiometer (SFMR) wind estimates, the radar backscatter signals acquired in major Hurricanes from Sentinel‐1 and Radarsat‐2 SAR, reveal high sensitivity in the cross‐polarized channel for wind speeds up to 75 m/s. The combination of the two co‐ and cross‐ polarized channels can then be used to derive high resolution surface wind estimates. The retrieval methods and impacts of intense rainfall are discussed in the context of a Hurricane Irma (2017) case study. On September 7, 2017, Sentinel‐1 measurements intercepted Hurricane...
Tipo: Text
Palavras-chave: SAR; Copolarization and cross-polarization; High resolution; Category 5 Hurricane; Hurricane Irma.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00497/60898/64236.pdf

The use of size fractionation for determining the bacterial contribution to overall pelagic oxygen consumption rates.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Laanbroek, H; Verplanke, J.
Size fractionations in combination with precise oxygen measurements, determinations of bacterial cell numbers and chlorophyll a analyses were used in the Oosterschelde basin and Lake Grevelingen to establish the bacterial contribution to overall pelagic oxygen consumption rates. On computation, 101 and 59% of total respiration could be attributed to bacterial activity in winter in the basin and in the lake, respectively. In summer, the bacterial component of total activity was calculated to amount to 54 and 57% in the basin and in the lake, respectively. Microbial contribution to in situ overall activity may slightly be overestimated by growth of the bacteria observed during incubation of the samples in oxygen in the dark at in situ temperatures.
Tipo: Text
Palavras-chave: ANE; Netherlands Oxygen consumption Chlorophylls Bacteria collecting devices Dissolved oxygen.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-961.pdf

Slip rate estimation along the western segment of the Main Marmara Fault over the last 405–490 ka by correlating mass transport deposits
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Grall, Celine; Henry, P.; Thomas, Yannick; Westbrook, Graham; Cagatay, M. N.; Marsset, Bruno; Saritas, H.; Cifci, G.; Geli, Louis.
[1] High-resolution 3-D seismic data acquired in the Sea of Marmara on the Western High, along the northwestern branch of the North Anatolian Fault (also known as the Main Marmara Fault), shed new light on the evolution of the deformation over the last 500–600 ka. Sedimentary sequences in ponded basins are correlated with glacioeustatic cycles and transitions between marine and low sea/lake environments in the Sea of Marmara. In the 3 × 11 km2 of the 3-D seismic survey, deformation over the last 405–490 ka is localized along the main fault branch and north of it, where N130°–N140° trending normal faults and N40°–N50° folding accommodated strike-slip deformation associated with active argillokinesis. There is some evidence that deformation was more...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00169/28074/26289.pdf

Characterising the temporal variability of the spatial distribution of animals: an application to seabirds at sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Certain, Gregoire; Bellier, E; Planque, Benjamin; Bretagnolle, V.
Understanding the patterns of spatial and temporal variations in animal abundance is a fundamental question in ecology. Here, we propose a method to quantify temporal variations in animal spatial patterns and to determine the spatial scale at which such temporal variability is expressed. The methodology extends from the approach proposed by Taylor (Taylor, L. R. 1961. Aggregation, variance and the mean. Nature 189: 732-735) and relies on models of the relationship between temporal mean and variance in animal abundance. Repeated observations of the spatial distribution of populations are used to construct spatially explicit models of Taylor's power law. The resulting slope parameters of the Taylor power law provide local measures of the temporal variability...
Tipo: Text
Palavras-chave: Temporal variability; Taylor's Power Law; Spatio temporal distribution; Seabirds; Scale dependence; Bay of Biscay.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3523.pdf

Validation of Salinity Data from Surface Drifters
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Reverdin, Gilles; Morisset, S.; Boutin, Jacqueline; Martin, Nicolas; Sena-martins, M.; Gaillard, Fabienne; Blouch, P.; Rolland, J.; Font, J.; Salvador, J.; Fernandez, Pili; Stammer, D.
Salinity measurements from 119 surface drifters in 2007-12 were assessed; 80% [Surface Velocity Program with a barometer with a salinity sensor (SVP-BS)] and 75% [SVP with salinity (SVP-S)] of the salinity data were found to be usable, after editing out some spikes. Sudden salinity jumps are found in drifter salinity records that are not always associated with temperature jumps, in particular in the wet tropics. A method is proposed to decide whether and how to correct those jumps, and the uncertainty in the correction applied. Northeast of South America, in a region influenced by the Amazon plume and fresh coastal water, drifter salinity is very variable, but a comparison with data from the Soil Moisture and Ocean Salinity satellite suggests that this...
Tipo: Text
Palavras-chave: Surface observations; Surface layer; Data quality control; Buoy observations.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00190/30095/28748.pdf

Herpesviruses associated with mortalities among Pacific oyster, Crassostrea gigas, in France-Comparative study
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Renault, Tristan; Le Deuff, Rose-marie; Cochennec, Nathalie; Maffart, Patricia.
Sporadic mortalities were reported in june and july of 1992 and 1993 among batches of hatchery-reared larval Pacifie oyster, Crassastrea gigas, and at the beginning of July and in August of 1993 among five batches of 3-7 month old young spats, C. gigas. Observations with transmission electron microscope showed the presence of herpes-like virus particles in infected larvae and young spats. The viruses observed in diseased larvae and affected young spat oysters were very similar. Elevated temperature and crowding may increase susceptibility of oysters to these herpes-like virus infections.
Tipo: Text
Palavras-chave: Spat; Larvae; Crassostrea gigas; Pacific oysters; Mortality; Herpes like virus; Naissain; Larve; Crassostrea gigas; Huître japonaise; Mortalités; Herpès like virus.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/1994/publication-2898.pdf

Resolving the Ophioderma longicauda (Echinodermata: Ophiuroidea) cryptic species complex: five sisters, three of them new
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Stöhr, Sabine; Weber, Alexandra; Boissin, Emilie; Chenuil, Anne.
The conspicuous Mediterranean brittle star Ophioderma longicauda (Bruzelius, 1805) has been discovered to represent a cryptic species complex, consisting of six nuclear clusters with contrasting reproductive modes (broadcast spawners and brooders). Here, O. longicauda is re-described. It is distinguished by a dark reddish-brown colouration both dorsally and on the ventral disc, and multiple tumid dorsal arm plates. One eastern Mediterranean brooding cluster is described as O. zibrowii sp. nov., characterized by a dark olive-green colour both dorsally and on the ventral disc, and single dorsal arm plates. Another brooder is described from Tunisia as O. hybrida sp. nov., with a highly variable morphology that reflects its origin by hybridization of...
Tipo: Text
Palavras-chave: Brittle stars; New species; Morphology; Mediterranean Sea; West Africa.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00610/72236/71039.pdf

Evaluation of FluoroProbe® performance for the phytoplankton-based assessment of the ecological status of Mediterranean coastal lagoons
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Garrido, Marie; Cecchi, Philippe; Malet, Nathalie; Bec, Beatrice; Torre, Franck; Pasqualini, Vanina.
The European Water Framework Directive and several other legislations worldwide have selected phytoplankton for monitoring the ecological status of surface waters. This assessment is a complicated task in coastal lagoons due to their intrinsic variability, prompting moves to use real-time measurements. Here, we tested the ability of the submersible spectrofluorometer FluoroProbe® to accurately estimate the phytoplankton biomass and to efficiently discriminate spectral groups in Mediterranean coastal lagoons, by using sub-surface water samples (n = 107) collected at Biguglia lagoon (Corsica) in different environmental situations (salinity and trophic state) from March 2012 to December 2014. We compared the estimates of biomass and phytoplankton group...
Tipo: Text
Palavras-chave: Phytoplankton; Monitoring; Mediterranean coastal lagoons; FluoroProbe (R); HPLC.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00484/59582/62623.pdf

Approche métagénomique de la chimiosynthèse en système hydrothermal océanique profond : cas particulier des symbioses bactériennes associées à la crevette Rimicaris exoculata
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Jan, Cyrielle.
The hydrothermal shrimp Rimicaris exoculata is an endemic species of the Mid-Atlantic Ridge (MAR).This species lives in dense aggregates on the walls of active chimneys and dominates the megafauna of most of these sites. This shrimp has two distinct microbial communities whose roles remain almost unknown. One of these communities is associated with the cephalothorax and hypertrophied mouthparts.These are covered by a dense community of bacteria affiliated to chemoautotrophic epibionts associated with mineral deposits. To deepen our knowledge on the symbiotic community in the context of the thesis, a metagenomic approach was undertaken. This helped highlighting the microbial diversity present with a dominant phylum, the Proteobacteria. Two classes are...
Tipo: Text
Palavras-chave: Epibiontes; Métagénomique; Rimicaris exoculata; Symbiose; Zetaproteobacteria; Symbiosis; Epibionts; Metagenomic.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00498/60954/64357.pdf

Genetic relationship between koi herpesvirus disease resistance and production traits inferred from sibling performance in Amur mirror carp
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Zhao, Jinfeng; Prchal, Martin; Palaiokostas, Christos; Houston, Ross D.; Kause, Antti; Vandeputte, Marc; Vergnet, Alain; Bugeon, Jérôme; Bestin, Anastasia; Veselý, Tomáš; Pokorová, Dagmar; Piačková, Veronika; Pojezdal, Lubomír; Genestout, Lucie; Gela, David; Kroupová, Hana K.; Kocour, Martin.
Koi herpesvirus disease (KHVD) is currently the most serious threat to global carp farming. Prevention is a sensible strategy for tackling this disease and improved genetic resistance of carp strains is a desirable breeding goal. To study the potential for multitrait selection, the objective of the current study was to estimate the genetic correlations between KHVD resistance and production traits in Amur mirror carp. A total of 1500 fingerlings from four factorial crosses of five dams and ten sires were challenged with Koi herpesvirus (KHV). Juvenile growth-related traits were collected on the same individuals before the challenge test. Production traits were measured on siblings of the challenged population at different life stages (yearling to market...
Tipo: Text
Palavras-chave: Common carp; KHVD; Body shape traits; Slaughter yields; Heritability; Genetic correlation.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00604/71623/70066.pdf

Avis de l’Ifremer sur le projet d’arrêté préfectoral portant ouverture sanitaire temporaire de la zone à éclipse n° 62.10 en Baie de Canche / Hardelot-Le Touquet pour le groupe 2.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lefebvre, Alain; Verin, Francoise.
Avis de l’Ifremer concernant le projet d’arrêté préfectoral portant ouverture sanitaire temporaire de la zone à éclipse n°62.10 Baie de Canche / Hardelot-Le Touquet pour le groupe 2. La zone 62.10 est identifiée comme zone de production dont l’exploitation est soumise à autorisation préalable et sous conditions particulières (zone à éclipse) par arrêté préfectoral portant classement de salubrité des zones de production et de reparcage de coquillages vivants du département du Pas-de-Calais en date du 8 février 2018. Cette zone est non classée. Le suivi des zones à exploitation occasionnelle (dites à éclipses) doit suivre les règles applicables au classement et au suivi de certaines zones de production conchylicoles de l’instruction technique...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00499/61081/64538.pdf

X-Linked Retinitis Pigmentosa 2 Is a Novel Maternal-Effect Gene Required for Left-Right Asymmetry in Zebrafish
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Desvignes, Thomas; Nguyen, Thaovi; Chesnel, Franck; Bouleau, Aurelien; Fauvel, Christian; Bobe, Julien.
Retinitis pigmentosa 2 (RP2) gene is responsible for up to 20% of X-linked retinitis pigmentosa, a severe heterogeneous genetic disorder resulting in progressive retinal degeneration in humans. In vertebrates, several bodies of evidence have clearly established the role of Rp2 protein in cilia genesis and/or function. Unexpectedly, some observations in zebrafish have suggested the oocyte-predominant expression of the rp2 gene, a typical feature of maternal-effect genes. In the present study, we investigate the maternal inheritance of rp2 gene products in zebrafish eggs in order to address whether rp2 could be a novel maternal-effect gene required for normal development. Although both rp2 mRNA and corresponding protein are expressed during oogenesis, rp2...
Tipo: Text
Palavras-chave: Developmental biology; Egg developmental competence; Egg quality; Fish; Fish reproduction; Maternal-effect gene; Ndpk; Nme10; Oocyte; Oocyte-specific; Ovum; Teleost; Zygote.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00280/39099/37660.pdf

Compatibility Polymorphism Based on Long-Term Host-Parasite Relationships: Cross Talking Between Biomphalaria glabrata and the Trematode Schistosoma mansoni From Endemic Areas in Brazil
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lima, Mariana G.; Montresor, Lângia C.; Pontes, Joana; Augusto, Ronaldo De C.; Silva, Jairo Pinheiro Da; Thiengo, Silvana C.
Sympatric snail populations have been kept in the laboratory since the isolation of the parasite from the field. To evaluate the influence of the intermediate host in the infectivity of S. mansoni, this allopatric strain was compared to two sympatric strains, from different geographical origins, and with different time of maintenance in the laboratory. Snail–trematode compatibility was accessed for a total of nine possible combinations (three snail populations, three schistosome strains), using different charges of parasite: 1, 5, 10, and 15 miracidia/snail. Each S. mansoni strain was characterized according to its infectivity phenotype that reflects the efficiency of their infection mechanism and all B. glabrata populations were characterized according to...
Tipo: Text
Palavras-chave: Snail-trematode; Host-parasite; Interaction; Compatible; Incompatible; Infectivity; Resistance; Schistosomiasis.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00489/60084/63419.pdf

Biodiversity of shallow-water brachiopods from New Caledonia, SW Pacific, with description of a new species
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bitner, Maria Aleksandra.
Twelve species of recent brachiopods belonging to the genera Lingula, Discradisca, Novocrania, Xenobrochus, Eucalathis, Frenulina, Argyrotheca, Campages, Thecidellina and Lacazella were identified in samples collected during shallow-water cruises around New Caledonia, southwest Pacific. Six genera, Lingula, Xenobrochus, Eucalathis, Frenulina, Campages and Thecidellina, have been already reported from the New Caledonian region, while four genera, Discradisca, Novocrania, Argyrotheca and Lacazella are the first records from this region. Additionally, Discradisca stella is the first discinid brachiopod recognized in the New Caledonia area. One new species is described, the megathyridid Argyrotheca neocaledonensis n. sp. The biogeographical affinities of the...
Tipo: Text
Palavras-chave: Recent brachiopods; Biogeography; Shallow water; New Caledonia; Southwest Pacific; Taxonomy; New species.
Ano: 2010
URL: https://archimer.ifremer.fr/doc/00466/57793/60061.pdf

Modèle non linéaire et non hydrostatique appliqué à l'étude des fronts internes dans le détroit de gibraltar
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cavanie, Alain.
In a previous article (1969), the author demonstrated, through the use of a hydrostatic model and of the Boussinesq hypothesis, the importance of some non-linear terms in the formation of inner fronts; this model provides a criterion for the easing and intensification of the slope of a simple wave according to the wave's upshore conditions. In this article, the use of a regular perturbation method enables us to free ourselves both from the long wave hypothesis and from the Boussinesq hypothesis. The theoretical model we created demonstrates the importance of non-linear terms in the formation of secondary oscillations upshore from the front. A phenomenon which was extensively observed in the eastern part of the Gibraltar straight. As the parameters of the...
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1971
URL: http://archimer.ifremer.fr/doc/1970/publication-4885.pdf

An intercomparison of Arctic ice drift products to deduce uncertainty estimates
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sumata, Hiroshi; Lavergne, Thomas; Girard-ardhuin, Fanny; Kimura, Noriaki; Tschudi, Mark A.; Kauker, Frank; Karcher, Michael; Gerdes, Rudiger.
An intercomparison of four low-resolution remotely sensed ice-drift products in the Arctic Ocean is presented. The purpose of the study is to examine the uncertainty in space and time of these different drift products. The comparison is based on monthly mean ice drifts from October 2002 to December 2006. The ice drifts were also compared with available buoy data. The result shows that the differences of the drift vectors are not spatially uniform, but are covariant with ice concentration and thickness. In high (low) ice-concentration areas, the differences are small (large), and in thick (thin) ice-thickness areas, the differences are small (large). A comparison with the drift deduced from buoys reveals that the error of the drift speed depends on the...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00203/31395/29783.pdf

The impact of the MARINET initiative on the development of Marine Renewable Energy
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Maisondieu, Christophe; Healy, Mark.
Marine Renewable Energy Conversion systems comprise wave energy and tidal stream converters as well as offshore-wind turbines for electrical generation. These technologies are currently at different stages of development but are mostly at the pre-commercial stage and require research to be undertaken at a series of scales along the path to commercialization. However each of these technologies also needs specific research infrastructures in order to conduct this research. The aim of the MARINET initiative is to coordinate research and development at all scales (small models through to prototype scales, from laboratories through to open sea tests) and to allow access for researchers and developers to infrastructures which are not available universally in...
Tipo: Text
Palavras-chave: Marine Renewable Energy; Research Infrastructures; Testing Facilities; Technology Readiness Level; Structured Development Plan.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00270/38161/36296.pdf

DNA extractions from deep subseafloor sediments: Novel cryogenic-mill-based procedure and comparison to existing protocols
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Alain, Karine; Callac, Nolwenn; Ciobanu, Maria Cristina; Reynaud, Yann; Duthoit, Frederique; Jebbar, Mohamed.
Extracting DNA from deep subsurface sediments is challenging given the complexity of sediments types, low bio-masses, resting structures (spores, cysts) frequently encountered in deep sediments, and the potential presence of enzymatic inhibitors. Promising results for cell lysis efficiency were recently obtained by use of a cryogenic mill (Lipp et al., 2008). These findings encouraged us to devise a DNA extraction protocol using this tool. Thirteen procedures involving a combination of grinding in liquid nitrogen (for various durations and beating rates) with different chemical solutions (phenol, chloroform, SDS, sarkosyl, proteinase, GTC), or with use of DNA recovery kits (MagExtractor (R)) were compared. Effective DNA extraction was evaluated in terms of...
Tipo: Text
Palavras-chave: Sediment; DNA extraction; Deep subsurface biosphere.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00056/16691/14364.pdf

Rapport sur la pêche des marins pêcheurs dans l'estuaire de l'Adour en 1993
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Prouzet, Patrick; Martinet, Jean-pierre; Cuende, François - Xavier.
Situation géographique et caractéristiques de la zone prospectée par les professionnels maritimes  La zone de pêche étudiée se trouve dans la région du Bas-Adour (cf carte de situation). Elle est limitée en aval par la "barre de l'Adour" et en amont par le "bec du Gave" (confluence de l'Adour et des Gaves réunis) et la première pêcherie des Gaves Réunis. Cela représente une distance prospectée de 33 km. Cette portion de l'Adour est soumise à l'influence de la marée compte tenu de son absence d'élévation par rapport au niveau de la mer. La limite de salure des eaux fixée par le décret du 4 juillet 1853 se situe au pont d'Urt (château de Montpellier) à 22 km de la limite transversale de la mer. Ainsi, l'aire d'étude se situe à la fois en zone maritime et en...
Tipo: Text
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00086/19698/17339.pdf

Etude expérimentale et modélisation des effets de la lumière et des sels nutritifs azotés sur la croissance d'une algue unicellulaire servant de fourrage en aquaculture intensive
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Frecon, Pierre.
INTRODUCTION For several years, intensive aquaculture has been aiming at experimentally building shortened food chain allowing commercial farming of one mollusk or fish specie. Therefore, CNEXO (IFREMER) developed several branches in its laboratories, each one starting with the growing of one or several unicellular algae which primary production was utilised to feed, either an intermediary herbivore crustacean, or directly larvae or juvenile mollusks (abalone, scallops...). A first step consisted in setting up then trivialize in vitro algal production. Now that we can benefit from routine farming, it seems interesting to move on to a second step, a more analytical one, in order to possibly optimize this type of production. The object of this DEA internship...
Tipo: Text
Palavras-chave: Nitrogenized nutritive salts; Light; Growth; Unicellular seaweed; Intensive aquiculture; Sels nutritifs azotés; Lumière; Croissance; Algue unicellulaire; Aquaculture intensive.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/rapport-1654.pdf

Inventaire des herbiers de zostères Baie de Saint-Malo / Rance Haut estuaire du Trieux
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gerla, Daniel.
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00055/16596/14101.pdf

Atlas de la faune marine invertébrée du golfe Normano-Breton. Volume 6. Espèces d'intérêt particulier
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Mao, Patrick; Godet, Laurent; Fournier, Jérôme; Desroy, Nicolas; Gentil, Franck; Thiébault, Eric; Pourinet, Laurent.
Le golfe Normano-Breton est bordé au sud par les côtes rocheuses bretonnes indentées des deux grandes baies de Saint-Brieuc et du Mont-Saint-Michel et, à l’est, par les côtes normandes, essentiellement sableuses et ponctuées d’une succession de havres entre les falaises de Carolles et le cap de la Hague. Abritant les îles Anglo-Normandes, ce golfe se caractérise par des petits fonds généralement inférieurs à 50 mètres de profondeur, un régime de marée macro à mégatidal, de forts courants et la présence de structures tourbillonnaires qui l’isolent en partie du reste de la Manche occidentale. La mosaïque de ses fonds – composés pour l’essentiel de sédiments grossiers – et de ses habitats benthiques, combinée à une riche histoire naturaliste, en font un...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00612/72374/71333.pdf

Les protides du poisson et leur valeur alimentaire
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Jacquot, Raymond; Creac'H, Paul V.
Tipo: Text
Ano: 1950
URL: http://archimer.ifremer.fr/doc/00022/13310/10358.pdf

Effects of the submesoscale on the potential vorticity budget of ocean mode waters
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Wenegrat, Jacob O.; Thomas, Leif N.; Gula, Jonathan; Mcwilliams, James C.
Non-conservative processes change the potential vorticity (PV) of the upper ocean, and later, through the subduction of surface waters into the interior, affect the general ocean circulation. Here we focus on how boundary layer turbulence, in the presence of submesoscale horizontal buoyancy gradients, generates a source of potential vorticity at the ocean surface through a balance known as the Turbulent ThermalWind. This source of PV injection at the submesoscale can be of similar magnitude to PV fluxes from the wind and surface buoyancy fluxes, and hence can lead to a net injection of PV onto outcropped isopycnals even during periods of surface buoyancy loss. The significance of these dynamics is illustrated using a high-resolution realistic model of the...
Tipo: Text
Palavras-chave: Ageostrophic circulations; Atmosphere-ocean interaction; Fronts; Ocean dynamics; Potential vorticity; Boundary layer.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00452/56347/57937.pdf

Mémoire d'alternance. Licence Professionnelle "Maintenance Portuaire et Navale". Session 2016/2017
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: L'Hostis, Mathieu.
Ce mémoire a pour objet de présenter le déroulé de l’année de formation en alternance que j’ai effectuée dans la cadre de la licence professionnelle Maintenance Portuaire et Navale (MPN) et plus particulièrement l’avance des propositions pour assurer un suivi et une maintenance adaptée aux contraintes spécifiquement liées au milieu naturel
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00396/50709/51410.pdf

Interim Report of the Working Group on Introductions and Transfers of Marine Organisms (WGITMO). 7–9 March 2018, Madeira, Portugal
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ICES.
The 44th meeting of the Working Group on Introductions and Transfers of Marine Organisms (WGITMO) was held in Caniçal, Madeira, Portugal, 7–9 March 2018. This meeting included a joint day with the Working Group on Ballast Water and Other Ship Vectors (WGBOSV). The meeting was hosted by João Canning-Clode (Portugal) and chaired by Cynthia McKenzie (Canada). The meeting was attended by 34 scientists, from 21 countries; six additional scientists participated in person, and five participated by webconference on the joint meeting day with WGBOSV. The objective of the meeting was to communicate new information and discuss several aspects of the introductions and transfers of marine organisms relevant to the six terms of reference for the working group. There was...
Tipo: Text
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00453/56434/58121.pdf

A Well-Kept Treasure at Depth: Precious Red Coral Rediscovered in Atlantic Deep Coral Gardens (SW Portugal) after 300 Years
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boavida, Joana; Paulo, Diogo; Aurelle, Didier; Arnaud-haond, Sophie; Marschal, Christian; Reed, John; Goncalves, Jorge M. S.; Serrao, Ester A.
Background The highly valuable red coral Corallium rubrum is listed in several Mediterranean Conventions for species protection and management since the 1980s. Yet, the lack of data about its Atlantic distribution has hindered its protection there. This culminated in the recent discovery of poaching activities harvesting tens of kg of coral per day from deep rocky reefs off SW Portugal. Red coral was irregularly exploited in Portugal between the 1200s and 1700s, until the fishery collapsed. Its occurrence has not been reported for the last 300 years. Results Here we provide the first description of an Atlantic red coral assemblage, recently rediscovered dwelling at 60-100 m depth in southern Portugal. We report a very slow growth rate (0.23 mm year-1),...
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00314/42498/41877.pdf

Caractérisation de l'état d'eutrophisation des trois principaux étangs corses (Biguglia, Diana et Urbino), et proposition de renforcement de leur surveillance. Rapport final
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Orsoni, Valerie; Souchu, Philippe; Sauzade, Didier.
L'étude porte sur les trois principaux étangs corses (Biguglia, Diana et Urbino), situés à la bordure de la plaine orientale. Ecosystèmes fragiles et productifs, ces étangs supportent des enjeux importants, en tant qu'habitats naturels remarquables et du fait de leur exploitation intensive par la pêche, l'aquaculture et la conchyliculture. Cette étude vise à évaluer leur état d'eutrophisation, en utilisant une méthode de diagnostic spécifique aux milieux lagunaires méditerranéens, développée par l'Ifremer pour l'Agence de l'eau Rhône Méditerranée Corse, et portant sur l'utilisation d'indicateurs caractérisant la colonne d'eau, dont le phytoplancton, le sédiment et les macrophytes. Dans l'eau, les prélèvements ont été réalisés sur une période de 12 mois en...
Tipo: Text
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00074/18534/16078.pdf

EU purse seine fishery interaction with marine turtles in the Atlantic and Indian Oceans: a 15 years analyses
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Clermont, Sandra; Chavance, Pierre; Delgado De Molina, Alicia; Murua, Hilario; Ruiz, Jon; Ciccione, Stephane; Bourjea, Jerome.
Bycatch of marine turtles, vulnerable or endangered species, is a growing issue of all fisheries, including Oceanic purse-seine fishery. The present paper seeks to assess marine turtle bycatch at a spatial and temporal level in the European purse seine fishery operating in the Atlantic and Indian Oceans. The study was based on data collected through French and Spanish observer programs from 1995 to 2011, a period where more than 230 000 fishing sets were realized by the UE fleets in both Oceans. A total of 15 913 fishing sets were observed, including 6 515 on drifting Fish Aggregate Devices (FAD) and 9 398 on Free Swimming Schools (FSC). Over the study period, 597 turtles were caught, 86% being released alive at sea. At the same time, from 2003 to 2011, 14...
Tipo: Text
Palavras-chave: European tuna fishery; Purse seine; Marine turtle; Bycatch; Atlantic and Indian Oceans.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00149/25991/24087.pdf

Methanogenic and fertilizing potential of aquaculture waste: towards freshwater farms energy self‐sufficiency in the framework of blue growth
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ndiaye, Ndeye Aida; Maiguizo-diagne, Halima; Diadhiou, Hamet Diaw; Ndiaye, Waly Ndianco; Diedhiou, Fulgence; Cournac, Laurent; Gaye, Mohamed Lamine; Fall, Saliou; Brehmer, Patrice.
he fisheries sector, particularly aquaculture, is a fundamental source of nutrition for humans, particularly in developing countries. The modern development of fish farming requires energy for production systems. This study investigates the potential of using organic wastes derived from fish fattening to produce on‐farm energy through the process of methanization. Oreochromis niloticus faeces methanogen potential was determined with (IFF) and without (UIFF) methanizer microbial inoculum. At the end of the manure methanation trials, the resulting digestates were tested as organic fertilizers for agriculture. The tests showed that inoculated fish faeces had faster biogas kinetics production compared with uninoculated fish faeces. In both cases, the produced...
Tipo: Text
Palavras-chave: Biogas; Digests; Energy recovery; Fish faeces; Methanation; Sustainable science.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00588/70033/70230.pdf

Raising procedures for discards : Sampling theory
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vigneau, Joel.
The "best" raising procedure for discards in fishery science is a method everyone talks about but nobody has ever seen it. The specific workshop on discards (Anon. 2003) proposes formulas that are too simplistic as they do not take into account the within trip variance. The literature is full of attempts and results but they are always specific to particular case studies (Stratoudakis et al, 2001, Cotter et al, 2001) or based on inconsistent hypothesis as demonstrated by Rochet and Trenkel (2005). When some generalities are finally found (Borges et al., 2005), the formulas developed do not correspond to multistage sampling because of the unavailability of essential parameters and because the aim of the study is "not to identify optimum raising procedures"....
Tipo: Text
Palavras-chave: Multistage sampling; Raising procedure; Discards.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/acte-2699.pdf

Qualité du Milieu Marin Littoral - Bulletin de la surveillance - Edition 2009 - Départements : Charente- Maritime &amp; Vendée (Sud)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer.
Le Laboratoire Environnement Ressources des Pertuis Charentais opère, sur le littoral des départements de Charente-Maritime et de Vendée (partie sud), les réseaux de surveillance nationaux1 de l'Ifremer dont une description succincte est présentée ci-dessous. Les résultats figurant dans ce bulletin sont obtenus à partir de données validées extraites de la base Ifremer Quadrige (base des données de la surveillance de l'environnement marin littoral), données recueillies jusqu’en 2008, REMI Réseau de contrôle microbiologique : REPHY Réseau de surveillance du phytoplancton et des phycotoxines, ROCCH Réseau d’observation de la contamination chimique, REMORA Réseau mollusques des ressources aquacoles, REMOULA Réseau régional de suivi de la croissance des moules
Tipo: Text
Palavras-chave: Surveillance pollution; Milieu marin; Réseau observation; Zone littorale; Phytoplancton; Metal lourd; Toxicité; Escherichia coli; Alexandrium; Dinophysis; Charente Maritime; Vendée Sud.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00041/15213/12540.pdf

Seabird acoustic communication at sea: a new perspective using bio-logging devices
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thiebault, Andrea; Pistorius, Pierre; Mullers, Ralf; Tremblay, Yann.
Most seabirds are very noisy at their breeding colonies, when aggregated in high densities. Calls are used for individual recognition and also emitted during agonistic interactions. When at sea, many seabirds aggregate over patchily distributed resources and may benefit from foraging in groups. Because these aggregations are so common, it raises the question of whether seabirds use acoustic communication when foraging at sea? We deployed video-cameras with built in microphones on 36 Cape gannets (Morus capensis) during the breeding season of 2010-2011 at Bird Island (Algoa Bay, South Africa) to study their foraging behaviour and vocal activity at sea. Group formation was derived from the camera footage. During similar to 42 h, calls were recorded on 72...
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00625/73757/74429.pdf

Relationship between individual and group learning in a marine teleost: A case study with sea bass under self-feeding conditions
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Benhaim, David; Ferrari, Sebastien; Colchen, Tatiana; Chatain, Beatrice; Begout, Marie-laure.
Fish learning and cognition are usually approached by testing single individuals in various devices such as mazes that have serious drawbacks, especially in gregarious species, including the stress induced by the test procedure. This might impair the results and lead to misinterpretation about the learning abilities of the targeted species. In order to provide an alternative to the individual-based tests, we investigated for the first time the operant conditioning of four similar groups (50 individuals per tank) of sea bass. We used two computerized self-feeder devices per tank, each coupled with individual electronic identification and that were alternately activated during varying positive appetitive reinforcement period of time (7 to 1 day). Learning...
Tipo: Text
Palavras-chave: Operant conditioning; Group conditions; Social structure; Producer-scrounger; Personality traits; Positive reinforcement.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00380/49125/49665.pdf

Le leg 82 du programme international de forages océaniques profonds (I.O.D.P.) : croûte océanique "normale" ou "anormale" sur la ride médio-Atlantique ; propriétés géochimiques
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bougault, Henri; Cande, S; Mills, W; Curtis, D; Neuser, R; Christie, D; Rideout, M; Etoubleau, Joel; Drake, N; Brannon, J; Weaver, B; Echols, D; Clark, M; Khan, Mj; Hill, I.
Tipo: Text
Ano: 1983
URL: http://archimer.ifremer.fr/doc/00311/42189/41490.pdf

Qualité du milieu marin littoral - Bulletin de la surveillance. Edition 2011. Départements du Gard, de l’Hérault, de l'Aude et des Pyrénées-Orientales
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer.
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00317/42833/42247.pdf

Submesoscale transition from geostrophic flows to internal waves in the northwestern Pacific upper ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Qiu, Bo; Nakano, Toshiya; Chen, Shuiming; Klein, Patrice.
With radar interferometry, the next-generation Surface Water and Ocean Topography satellite mission will improve the measured sea surface height resolution down to 15 km, allowing us to investigate for the first time the global upper ocean variability at the submesoscale range. Here, by analysing shipboard Acoustic Doppler Current Profiler measurements along 137 degrees E in the northwest Pacific of 2004-2016, we show that the observed upper ocean velocities are comprised of balanced geostrophic flows and unbalanced internal waves. The transition length scale, L-t, separating these two motions, is found to depend strongly on the energy level of local mesoscale eddy variability. In the eddy-abundant western boundary current region of Kuroshio, L-t can be...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00368/47935/47962.pdf

Remarques sur la pêche française en Islande (Le Gall J.)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Gall, Jean.
Sous ce même titre, M. J. HAENTJENS, Armateur, membre du Conseil d'Administration de l'Office des Pêches Maritimes, Vice-Président de la Section Grande Pêche au Comité Central des Armateurs de France, a bien voulu livrer aux lecteurs de la Revue des Travaux de l'Office des Pêches (1) son appréciation personnelle sur l'étude que nous avons eu l'occasion de publier dans cette même Revue (2) sur la Pêche en Islande.  Nous l'en remercions vivement.  Il nous paraît ensuite bien difficile, devant la haute compétence de M. HAENTJENS en matière de pêche, de chercher à réfuter ses critiques et de tenter de nous disculper des erreurs qu'il a cru devoir nous reprocher au sujet d'une question que nous n'avons suivie que de loin, mais assidûment, pendant quelques...
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1931
URL: http://archimer.ifremer.fr/doc/1931/publication-5888.pdf

Management of oyster and mussel culture
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Heral, Maurice; Drinkwaard, A.; Bohle, B.; Figueras, Antonio; Lavoie, R.; Maurer, Daniele.
The world aquaculture production (fresh and marine waters) achieved 11.1 million tonnes in 1986 (FAO, 1989). The molluscs represented 21 % of the total production. Marine aquaculture with 5.45 million tonnes reached 49% of the total production. The marine cultivated mollusc production was 2.25 million tonnes due mainly to oysters (36%), mussels (34%), clams (16%), and scallops (6%).  As the aquaculture production is clearly identified in the statistics only since 1984, the evolution of the production of oysters and mussels for the last 15 years has been analyzed with the FAO data for the total catch (fisheries and culture). By comparison of the two statistics for the same year (1986), the fisheries represented only 17% for oysters and 16% for mussels. Fig....
Tipo: Text
Palavras-chave: Culture; Mussels; Oysters; Panel report.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/1990/publication-3020.pdf

Biocénoses des fonds meubles du circalittoral. Sous-région marine Golfe de Gascogne. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Laffargue, Pascal; Baudinière, Estelle.
Tipo: Text
Palavras-chave: Golfe de Gascogne; Circalittoral; Fonds meubles; Substrats; Inventaires; Biocénoses; Espèces benthiques.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00329/44022/79135.pdf

Etude d'inventaire des sites de prolifération d'algues vertes sur le littoral breton - Etat des travaux au 31.08.1997
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Dans le cadre de la directive "nitrate" l'Agence de l'Eau a prévu de réaliser un état du développement des proliférations d'algues vertes sur l'ensemble du littoral breton. La dernière opération de ce type a été effectuée durant l'été 1994 lors d'une opération conjointe IFREMER/ CEVA. L'objectif de ce programme est d'une part, de dresser, pour l'ensemble du littoral breton, un inventaire et une cartographie des sites touchés par les proliférations algales (Ulva sp.) et d'autre part, de quantifier les biomasses algales sur les sites où le développement des algues vertes est le plus conséquent. De même, il sera possible, en comparant les données recueillies au cours de cette étude à celles obtenues lors des inventaires de même type réalisés par IFREMER en...
Tipo: Text
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00104/21480/19061.pdf

Description and phylogenetic position of     Plagiolemma distortum     sp. nov., a new raphid diatom (Bacillariophyceae) from French coastal waters
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Nezan, Elisabeth; Bilien, Gwenael; Boulben, Sylviane; Mertens, Kenneth; Chomerat, Nicolas.
A new marine raphid diatom, Plagiolemma distortum Nézan, sp. nov. is described from plankton samples from the Atlantic Ocean, south Brittany (north-western France), where it was regularly observed, but never in high abundances. Cells have an unusual and complex shape under light microscopy (LM) depending on their position and orientation. The two valves are highly vaulted and narrow in width (transapical axis). Cells contain four complexly lobed plastids and a variable number of refractive granules without particular localization. In addition, capsules containing motile cells were observed. Ultrastructural details of the frustules were investigated using scanning electron microscopy (SEM). The girdle bands are simple. Each valve possesses a sigmoid raphe...
Tipo: Text
Palavras-chave: Capsules; Habitat; Molecular phylogeny; Plastids; Raphid diatom; Video.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00441/55235/56797.pdf

Influence of environmental and anthropogenic factors on the composition, concentration and spatial distribution of microplastics: A case study of the Bay of Brest (Brittany, France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Frere, L.; Paul-pont, I.; Rinnert, Emmanuel; Petton, Sebastien; Jaffre, J; Bihannic, Isabelle; Soudant, P.; Lambert, C.; Huvet, Arnaud.
The concentration and spatial distribution of microplastics in the Bay of Brest (Brittany, France) was investigated in two surveys. Surface water and sediment were sampled at nine locations in areas characterized by contrasting anthropic pressures, riverine influences or water mixing. Microplastics were categorized by their polymer type and size class. Microplastic contamination in surface water and sediment was dominated by polyethylene fragments (PE, 53–67%) followed by polypropylene (PP, 16–30%) and polystyrene (PS, 16–17%) microparticles. The presence of buoyant microplastics (PE, PP and PS) in sediment suggests the existence of physical and/or biological processes leading to vertical transfer of lightweight microplastics in the bay. In sediment (upper...
Tipo: Text
Palavras-chave: Microplastic; Coastal ecosystem; Surface water; Sediment; Raman spectroscopy; Hydrodynamic; Dispersal particle modelling.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00379/48994/51083.pdf

Using empirical orthogonal functions derived from remote-sensing reflectance for the prediction of phytoplankton pigment concentrations
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bracher, A.; Taylor, M. H.; Taylor, B.; Dinter, T.; Roettgers, R.; Steinmetz, F.
The composition and abundance of algal pigments provide information on phytoplankton community characteristics such as photoacclimation, overall biomass and taxonomic composition. In particular, pigments play a major role in photoprotection and in the light-driven part of photosynthesis. Most phytoplankton pigments can be measured by high-performance liquid chromatography (HPLC) techniques applied to filtered water samples. This method, as well as other laboratory analyses, is time consuming and therefore limits the number of samples that can be processed in a given time. In order to receive information on phytoplankton pigment composition with a higher temporal and spatial resolution, we have developed a method to assess pigment concentrations from...
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00291/40257/39577.pdf

Biogeographical Patterns of Endolithic Infestation in an Invasive and an Indigenous Intertidal Marine Ecosystem Engineer
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ndhlovu, Aldwin; Mcquaid, Christopher D.; Nicastro, Katy; Marquet, Nathalie; Gektidis, Marcos; Monaco, Cristian; Zardi, Gerardo.
By altering the phenotypic properties of their hosts, endolithic parasites can modulate the engineering processes of marine ecosystem engineers. Here, we assessed the biogeographical patterns of species assemblages, prevalence and impact of endolithic parasitism in two mussel species that act as important ecosystem engineers in the southern African intertidal habitat, Perna perna and Mytilus galloprovincialis. We conducted large-scale surveys across three biogeographic regions along the South African coast: the subtropical east coast, dominated by the indigenous mussel, P. perna, the warm temperate south coast, where this species coexists with the invasive Mediterranean mussel, M. galloprovincialis, and the cool temperate west coast dominated by M....
Tipo: Text
Palavras-chave: Biogeographical region; Mytilus galloprovincialis; Perna perna; Rocky shores; Parasite.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00605/71689/70129.pdf

External controls on turbidite sedimentation on the glacially-influenced Armorican margin (Bay of Biscay, western European margin)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Toucanne, Samuel; Zaragosi, Sebastien; Bourillet, Jean-francois; Dennielou, Bernard; Jorry, Stephan; Jouet, Gwenael; Cremer, Michel.
Sequence stratigraphic models predict increased sediment delivery to deep-water areas during sea-level lowstand. The Armorican margin (Bay of Biscay, western European margin) is an interesting area to test this hypothesis because the margin has a wide continental shelf, still partly flooded during sea-level lowstand, and the Armorican turbidite system has experienced fluctuating sediment fluxes since the last glacial period. The stratigraphic response of the Armorican turbidite system to sea-level oscillations and climate changes was assessed for the last 35,000 years through the study of the Guilcher, Crozon and Audierne levees. Millenial-timescale resolution chronostratigraphy allowed us to reconstruct the sediment accumulation and turbidite frequency,...
Tipo: Text
Palavras-chave: Armorican margin; Bay of Biscay; Turbidite systems; Turbidity currents; Levee growth; External forcing; Deglaciation; Source-to-sink.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00070/18147/15708.pdf

Analyse des captures des flottilles opérant dans l’Ouest de l’Ecosse
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dube, Benoit; Demaneche, Sebastien; Biseau, Alain.
L’étude présentée est une analyse des informations recueillies dans le cadre du programme Obsmer en zone Ouest-Ecosse (Division CIEM Via et partie communautaire de la division Vb) au cours de l’année 2011. Quatre métiers pratiqués dans cette zone ont été analysés : 1. Chalutage à espèces profondes en Ouest Ecosse 2. Chalutage à espèces démersales (non profondes) en Ouest Ecosse 3. Fileyage à espèces démersales en Ouest Ecosse 4. Palangres à espèces démersales en Ouest Ecosse Un focus est réalisé sur le cabillaud (proportion dans la capture totale, taux de rejet…) avec une analyse, lorsque cela est possible, des causes ayant amené les rejets (taille légale, quotas…)
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00110/22168/19821.pdf

Registre isotòpic d'alquenones i lípids terrestres en sediment marí: una reconstrucció paleoclimàtica a l'oceà Índic
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ferrer Castillo, Montserrat.
Report for the scientific sojourn at the Institute of mineralogy and geochemistry of the University of Lausanne, Swiss, from 2007 to 2009. During the last decade, the scientific community has recognized the importance of the tropical regions in the dynamic processes that control the global climate change. These regions are considered probable triggers of the changes observed at higher latitudes. On the other hand, since the marine sediments located in tropical oceans are not under the direct influence of continental ice sheets formed during glacial periods, they provide a continuous record of the climatic variations in the Earth. However, it is not well understood what is the specific role of tropical regions for the climate changes at submillennial scale...
Tipo: Text
Ano: 2009
URL: https://archimer.ifremer.fr/doc/00503/61462/65225.pdf

Eddy stirring in the Southern Ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Garabato, A. C. Naveira; Ferrari, R.; Polzin, K. L.
There is an ongoing debate concerning the distribution of eddy stirring across the Antarctic Circumpolar Current (ACC) and the nature of its controlling processes. The problem is addressed here by estimating the isentropic eddy diffusivity kappa from a collection of hydrographic and altimetric observations, analyzed in a mixing length theoretical framework. It is shown that, typically, kappa is suppressed by an order of magnitude in the upper kilometer of the ACC frontal jets relative to their surroundings, primarily as a result of a local reduction of the mixing length. This observation is reproduced by a quasi-geostrophic theory of eddy stirring across a broad barotropic jet based on the scaling law derived by Ferrari and Nikurashin (2010). The theory...
Tipo: Text
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00227/33813/32489.pdf

Multiparametric investigation of North Sea particulate matter. Preliminary results in the Skagerrak
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boust, D; Dupont, J P; Bienvenu, P; Ezat, U; Lafite, R; Leboulanger, T; Vinchon, C; Albarede, F.
During the Tramanor cruise, in July 1988, seawater and particle samples were collected along a vertical profile (530 m depth) located in the Skagerrak, a crossing-area for different water-masses and particle pools. A sampling strategy was developed to ensure the homogeneity of the different sets of subsamples subjected to analysis by closely-coupled complementary techniques: turbidimetry, granulometry, scanning electron microscope (SEM) observations, Tracor analyses, particulate organic carbon and nitrogen measurements, and neutron activation analysis (NAA). The Baltic outflow is found in the topmost 20 m water-column (salinity approximately equals 23.5; temperature approximately equals 18 degree C) overlying North Sea waters (salinity approximately equals...
Tipo: Text
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00268/37875/35956.pdf

Reduced flow models from a stochastic Navier-Stokes representation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Resseguier, Valentin; Memin, Etienne; Chapron, Bertrand.
In large-scale Fluids Dynamics systems, the velocity lives in a broad range of scales. To be able to simulate its large-scale component, the flow can be de- composed into a finite variation process, which represents a smooth large-scale velocity component, and a martingale part, associated to the highly oscillating small-scale velocities. Within this general framework, a stochastic representation of the Navier-Stokes equations can be derived, based on physical conservation laws. In this equation, a diffusive sub-grid tensor appears naturally and gener- alizes classical sub-grid tensors. Here, a dimensionally reduced large-scale simulation is performed. A Galerkin projection of our Navier-Stokes equation is done on a Proper Orthogonal De- composition basis....
Tipo: Text
Palavras-chave: Stochastic calculus; Uid dynamics; Large eddy simulation; Proper Orthogonal Decomposition; Reduced order model; Uncertainty quantification.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00320/43080/42607.pdf

Reliance of deep-sea benthic macrofauna on ice-derived organic matter highlighted by multiple trophic markers during spring in Baffin Bay, Canadian Arctic
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Yunda-guarin, Gustavo; Brown, Thomas A.; Michel, Loic; Saint-béat, Blanche; Amiraux, Rémi; Nozais, Christian; Archambault, Philippe.
Benthic organisms depend primarily on seasonal pulses of organic matter from primary producers. In the Arctic, declines in sea ice due to warming climate could lead to changes in this food supply with as yet unknown effects on benthic trophic dynamics. Benthic consumer diets and food web structure were studied in a seasonally ice-covered region of Baffin Bay during spring 2016 at stations ranging in depth from 199 to 2,111 m. We used a novel combination of highly branched isoprenoid (HBI) lipid biomarkers and stable isotope ratios (δ13C, δ15N) to better understand the relationship between the availability of carbon sources in spring on the seafloor and their assimilation and transfer within the benthic food web. Organic carbon from sea ice (sympagic carbon...
Tipo: Text
Palavras-chave: Benthic food webs; Trophic markers; Sea-ice algae; Climate change; HBIs; Stable isotopes; Baffin Bay; Arctic Ocean.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00665/77749/79870.pdf

In vitro study on sperm competition in common carp (Cyprinus carpio L.)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kaspar, Vojtech; Hulak, Martin; Kohlmann, Klaus; Vandeputte, Marc; Rodina, Marek; Gela, David; Linhart, Otomar.
Sperm competition occurs when sperm from different males compete for fertilization. The aim of this in vitro fertilization study was to compare the competitive success of five males using heterosperm with an equal number of sperm from each male and four different sperm/egg ratios (5,000, 10,000, 20,000 and 100,000 spermatozoa per egg) in order to better understand variations of competitive fertilization. The roles of sperm motility and velocity were studied. Fertilization and hatching rates of the 5 males studied, with 100,000 spermatozoa per egg, were between 23.7-94.8% and 23.7-92.2%, respectively. Sperm velocity and percentage of motile sperm ranged from 85.0 to 137.6 mu m s(-1) and 2.0 to 93.5% at 15 see post sperm activation, respectively. The...
Tipo: Text
Palavras-chave: Paternity assignment; Artificial reproduction; Aquaculture.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-6551.pdf

Nitrogen cycling in the Southern Ocean Kerguelen Plateau area: evidence for significant surface nitrification from nitrate isotopic compositions
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dehairs, F.; Fripiat, F.; Cavagna, A. -j.; Trull, T.w.; Fernandez, C.; Davies, D.; Roukaerts, A.; Fonseca Batista, D.; Planchon, F.; Elskens, M.
This paper presents whole water column data for nitrate N, O isotopic composition for the Kerguelen Plateau area and the basin extending east of Heard Island, aiming at understanding the N-cycling in this naturally iron fertilized area that is characterized by large re-current phytoplankton blooms. The KEOPS 2 expedition (October-November 2011) took place in spring season and complements knowledge gathered during an earlier summer expedition to the same area (KEOPS 1, February-March 2005). As noted by others a remarkable condition of the system is the moderate consumption of nitrate over the season (nitrate remains &gt;20 mu M) while silicic acid becomes depleted, suggesting significant recycling of nitrogen. Nitrate isotopic signatures in the upper water...
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00260/37085/35584.pdf

Les heterospionidae (annélides polychète sédentaires) de méditerranée occidentale
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Laubier, Lucien; Picard, Chantal; Ramos, Jeanete.
From two series of specimens of the genus Heterospio (Polychaetous Annelids, sedentaria) collected in the western Mediterranean,  the authors describe two new species : the first one (H. mediterranena sp. n.) lives in bathyal muds, the second one ( H . reducta sp. n.) inhabits the abyssal plain.  The two new species are compared with the two (or three) other species previously known. These samples corroborate the recent discovery of a single specimen of this rare genus in the Mediterranean. [NOT CONTROLLED OCR]
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1973
URL: http://archimer.ifremer.fr/doc/1973/publication-5121.pdf

La mytiliculture en Baie de l'Aiguillon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Audouin, Jacques.
Plusieurs auteurs, en particulier Faideau, Bluteau, Lambert, Dubreuil, etc... ont déjà donné de nombreux détails sur la mytiliculture et sur les bouchots à moules de la Baie de l'Aiguillon. Afin que cette note donne une vue d'ensemble sur la mytiliculture, nous avons été amenés à reprendre et à résumer les données exposées par eux. Nous avons, en outre, ajouté certains détails de la technique employée par les boucholeurs. Nous nous sommes efforcés d'apprécier l'évolution qui s'est manifestée depuis une trentaine d'années. Cette étude comprend deux parties principales : Origine et forme des bouchot - Mode d'exploitation.
Tipo: Text
Palavras-chave: Mytiliculture; Baie Aiguillon; Histoire; Bouchot; Croissance; Moule.
Ano: 1954
URL: http://archimer.ifremer.fr/doc/00003/11464/8024.pdf

Mise à jour des données sur les organismes responsables d'eaux colorées - Extension au microplancton produisant des toxines - Tome 2
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lassus, Patrick.
Cet inventaire a été étendu à tous les organismes responsables ou associés à des eaux colorées ainsi qu'à ceux produisant une toxine (neuro- ou ichthyotoxine) dangereuse pour l'homme ou la faune marine
Tipo: Text
Ano: 1982
URL: http://archimer.ifremer.fr/doc/00045/15647/13050.pdf

Introduction to the Special Issue “Seafloor backscatter data from swath mapping echosounders: from technological development to novel applications”
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lamarche, Geoffroy; Lurton, Xavier.
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00435/54621/56084.pdf

Can individual feed conversion ratio at commercial size be predicted from juvenile performance in individually reared Nile tilapia Oreochromis niloticus?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rodde, Charles; Chatain, Beatrice; Vandeputte, Marc; Quoc Trinh, Trong; Benzie, John A.h.; De Verdal, Hugues.
Feed conversion ratio (FCR), the ratio between feed intake and body weight gain, is of major interest for improving aquaculture sustainability through reduced feed costs and environmental impacts. Demonstrating whether FCR measured in juvenile fish is an accurate predictor of their performance during the whole rearing period is critical to developing genetic improvement programs for this trait. This is especially true for estimates obtained in individually reared fish, for which this has high implications regarding the size of the necessary rearing structures. We obtained individual FCR from 30 male Nile tilapia Oreochromis niloticus from the GIFT strain individually reared in a recirculating system, from 36 to 260 g mean weight. They were fed twice a day...
Tipo: Text
Palavras-chave: Feed efficiency; GIFT tilapia; Individual rearing; Selective breeding.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00630/74175/73757.pdf

Provenance of North Atlantic ice-rafted debris during the last deglaciation-A new application of U-Pb rutile and zircon geochronology
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Small, David; Parrish, Randall R.; Austin, William E. N.; Cawood, Peter A.; Rinterknecht, Vincent.
Understanding the provenance of ice-rafted debris (IRD) provides a means to link the behavior of individual ice sheets to proxy records of climate change. Here we present a new approach to determining IRD provenance using U-Pb geochronology of detrital minerals rutile and zircon. We characterize potential source regions from Scotland using detrital rutile from modern fluvial systems, and demonstrate that their unimodal rutile U-Pb ages reflect the timing of the last amphibolite facies metamorphism of the source rocks, imparting a distinctive source signature. Contrasts between these spectra and the bimodal IRD (ca. 470 Ma and ca. 1800-2000 Ma) rutile age signatures rule out Scotland as the sole source and suggest a Laurentian contribution; IRD zircon ages...
Tipo: Text
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00181/29197/27590.pdf

Channel-levee evolution in combined contour current-turbidity current flows from flume-tank experiments
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Miramontes, Elda; Eggenhuisen, Joris T.; Silva Jacinto, Ricardo; Poneti, Giovanni; Pohl, Florian; Normandeau, Alexandre; Campbell, D. Calvin; Hernandez-molina, F. Javier.
Turbidity currents and contour currents are common sedimentary and oceanographic processes in deep-marine settings that affect continental margins worldwide. Their simultaneous interaction can form asymmetric and unidirectionally migrating channels, which can lead to opposite interpretations of paleocontour current direction: channels migrating against the contour current or in the direction of the contour current. In this study, we performed three-dimensional flume-tank experiments of the synchronous interaction between contour currents and turbidity currents to understand the effect of these combined currents on channel architecture and evolution. Our results show that contour currents with a velocity of 10-19 cm s(-1) can substantially deflect the...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00624/73602/73028.pdf

Mass production of juveniles of freshwater prawn Macrobrachium rosenbergii in french Polynesia : predevelopment phase results
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: AQUACOP.
Since 1973, a new method for mass production of Macrobrachium rosenbergii post-larvae has been set up in french Polynesia in CNEXO-COP centre in collaboration with Territorial Fisheries Service. The larvae are reared in clear water daily renewed, without phytoplankton and at hight density. 90 post-larvae per liter are obtained within six weeks on a diet of Artemia nauplii and inert particles. Since 1976, a pilot hatchery is working and ten pilot scale productions gave 4.6 million juveniles. The technology is described and the production costs discussed. [NOT CONTROLLED OCR]
Tipo: Text
Ano: 1980
URL: http://archimer.ifremer.fr/doc/1980/rapport-4442.pdf

"Summer Syndrome" in Litopenaeus stylirostris in New Caledonia: Pathology and epidemiology of the etiological agent, Vibrio nigripulchritudo
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Goarant, Cyrille; Ansquer, Dominique; Herlin, Jose; Domalain, David; Imbert, Frederic; De Decker, Sophie.
The Summer Syndrome is a new shrimp disease that has been affecting a shrimp growout farm in New Caledonia since end of 1997. It was recognized to be caused by a systemic vibriosis due to Vibrio nigripulchritudo. This new disease turned out almost immediately enzootic in the shrimp farm involved and has affected all its crops ever since. Since the year 2000, V. nigripulchritudo strains have been found in several shrimp farms, although Summer Syndrome is still limited to one particular area, affecting, since 2003, two adjoining farms. As part of a multidisciplinary research program, a high-frequency survey was carried out during the summer 2002-2003 in two shrimp farms: one affected farm and another one in which pathogenic strains could be isolated but...
Tipo: Text
Palavras-chave: Epidemiology; Vibrio; Diseases and their control; Shrimp.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1110.pdf

Contribution à la validation et à l'optimisation de la technique de PCR pour la détection de Bonamia ostreae chez l'huître plate : Ostrea edulis
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Touzeau, Damien.
L'ostréiculture représente une part économique régionale et française importante avec une production d'environ 117 106 Tonnes de coquillages par an (FAO, 2003). Cependant le développement de cette activité peut être limité par des mortalités, parfois massives, dues à des maladies infectieuses. L'huître plate Ostrea edulis a subi deux maladies majeures : la Marteiliose due à Marteilia refringens et la Bonamiose due à Bonamia ostreae. Ces maladies à déclaration obligatoires ont fait chuter la production de 20 000 tonnes dans les années 70 à 2 098 Tonnes aujourd'hui. Suite à ces mortalités, différents programmes de recherche ont été lancés par Ifremer pour tenter de préserver voire de relancer la culture de l'huître plate. Un de ces programmes concerne la...
Tipo: Text
Palavras-chave: Huître plate; Ostrea edulis; Parasite; Bonamia ostreae; Technique PCR; ARN 18 S; Diagnostic.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/00034/14478/11777.pdf

Evaluation de la qualité des zones de production conchylicole - Département des LANDES - Edition 2013
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Barbier, Claire; Auby, Isabelle.
Après un rappel des objectifs, du fonctionnement et de la méthode d’interprétation des résultats du réseau de contrôle microbiologique REMI et du réseau de surveillance chimique ROCCH, ce rapport inclut un bilan national et décrit le programme annuel du département des Landes. Il présente l’ensemble des résultats obtenus, en particulier l’estimation de la qualité microbiologique et chimique des zones de production de coquillages classées pour la période 2010-2012. La qualité a pu être estimée pour la zone de production conchylicole. Suivant les seuils microbiologiques du règlement (CE) n° 854/2004, la zone suivie sur le Lac d’Hossegor est estimé de qualité B pour le groupe 3. L’étude des tendances met en évidence une augmentation de la contamination...
Tipo: Text
Palavras-chave: REMI; E. coli; Contamination bactériologique des coquillages; ROCCH; Contaminants chimiques; Milieu marin; Classement sanitaire des zones de production; Département des Landes.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00151/26270/24354.pdf

A single clonal lineage of transmissible cancer identified in two marine mussel species in South America and Europe
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Yonemitsu, Marisa A; Giersch, Rachael M; Polo-prieto, Maria; Hammel, Maurine; Simon, Alexis; Cremonte, Florencia; Avilés, Fernando T; Merino-véliz, Nicolás; Burioli, Erika Av; Muttray, Annette F; Sherry, James; Reinisch, Carol; Baldwin, Susan A; Goff, Stephen P; Houssin, Maryline; Arriagada, Gloria; Vázquez, Nuria; Bierne, Nicolas; Metzger, Michael J.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00590/70255/68304.pdf

Deep sea sedimentary analogs for the Vostok ice core
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mortyn, Pg; Charles, Cd; Ninnemann, Us; Ludwig, K; Hodell, Da.
Many applications of the Vostok ice core depend critically on the ability to make stratigraphic ties to marine records in the adjacent Southern Ocean. Here we present oxygen isotopic records from high accumulation rate sites in the South Atlantic sector of the Southern Ocean, collected for the purpose of complementing the recently extended deltaD record from the Vostok ice core. The combination of several planktonic foraminiferal delta(18)O records from northern subantarctic piston cores demonstrates that all of the millennial-scale oscillations expressed in the Vostok ice core over the last 60 ky are also present in marine records. The observations also support the assumption that the millennial-scale oscillations common to both marine and ice archives...
Tipo: Text
Palavras-chave: Paleoclimatology; Paleoceanography; Meteorology and atmospheric dynamics : paleoclimatology.
Ano: 2003
URL: https://archimer.ifremer.fr/doc/00226/33707/32126.pdf

La pisciculture en eaux salées
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gobin, A.
La pisciculture est l'industrie qui a pour but d'exploiter les eaux par la production, l'élevage ou l'engraissement des Poissons, Crustacés, Mollusques, Annélides ou Zoophytes alimentaires ou simplement utiles. Elle opère, soit dans les eaux douces, soit dans celles plus ou moins salées, les seules dont nous ayons à nous occuper ici. Elle comprend logiquement deux études fondamentales : Celle des milieux, c'est-à-dire de l'eau, au point de vue de sa constitution physique et chimique; Puis celle des êtres que nous voulons y faire vivre et y multiplier, la physiologie de leurs fonctions, leurs moeurs, leur régime, etc.
Tipo: Text
Ano: 1891
URL: http://archimer.ifremer.fr/doc/00032/14304/11583.pdf

Processing of high-frequency multibeam echo sounder data for seafloor characterization
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hellequin, Laurent; Boucher, Jean; Lurton, Xavier.
Processing simultaneous bathymetry and backscatter data, multibeam echosounders (MBESs) show promising abilities for remote seafloor characterization. High-frequency MBESs provide a good horizontal resolution, making it possible to distinguish fine details at. the water-seafloor interface. However, in order to accurately measure the seafloor influence on the backscattered energy,the recorded sonar data must first be processed and cleared of various artifacts. generated by the sonar system itself. Such a preprocessing correction procedure along with the assessment of its validity limits is presented here and applied to a 95-kHz MBES (Simrad EM1000) data set. Beam pattern effects, uneven array sensitivities, and inaccurate normalization of the ensonified...
Tipo: Text
Palavras-chave: Seafloor classification; Multibeam echo sounder MBES; K distribution; Backscatter model.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/publication-708.pdf

Use of low density polyethylene membranes for assessment of genotoxicity of PAHs in the Seine River
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vincent-hubert, Francoise; Uher, Emmanuelle; Di Giorgio, Carole; Michel, Cecile; De Meo, Michel; Gourlay-france, Catherine.
The genotoxicity of river water dissolved contaminants is usually estimated after grab sampling of river water. Water contamination can now be obtained with passive samplers that allow a time-integrated sampling of contaminants. Since it was verified that low density polyethylene membranes (LDPE) accumulate labile hydrophobic compounds, their use was proposed as a passive sampler. This study was designed to test the applicability of passive sampling for combined chemical and genotoxicity measurements. The LDPE extracts were tested with the umu test (TA1535/pSK1002 ± S9) and the Ames assay (TA98, TA100 and YG1041 ± S9). We describe here this new protocol and its application in two field studies on four sites of the Seine River. Field LDPE extracts were...
Tipo: Text
Palavras-chave: Genotoxicity; River water; Passive samplers; PAHs; Ames assay; Umu test.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00371/48225/48402.pdf

Nouvelle carte bathymétrique au 1/100000 du banc de Gorringe (SW Portugal)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Beuzart, Paul; Le Lann, Alain; Monti, Serge; Auzende, Jean-marie.
A recent survey made with Seabeam allows us to present a bathymetric map (scale 1/100 000) of Gorringe Bank (SW Portugal). [NOT CONTROLLED OCR]
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/publication-5399.pdf

Complement dependent cytotoxicity activity of therapeutic antibody fragments is acquired by immunogenic glycan coupling
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Courtois, Anthony; Gac Breton, Stephanie; Berthou, Christian; Guezennec, Jean; Bordron, Anne; Boisset, Claire.
Oligosaccharides are implicated in the development of the immune response notably in complement activation. Anti-tumoural immunotherapy by monoclonal antibodies (mAbs) offers some advantages to chemotherapy including cell targeting but some of them are inefficient to generate cytotoxicity dependent complement (CDC) known to be important in the antibody's efficacy. The aim of this study is to give a CDC activity of mAb by linkage of a complement activating oligosaccharide to this antibody via a hetero-bifunctional linker allowing control of the conjugation reaction. We worked on non Hodgkin Burkitt's lymphoma as cancer source, Fab fragments of rituximab devoid of complement activity as mAb and the trisaccharide Gal alpha(1 -&gt; 3)Gal beta(1 -&gt; 4)GlcNAc...
Tipo: Text
Palavras-chave: Complement system Gal alpha(1 -&gt; 3)Gal epitope immunogenic oligosaccharide immunotherapy non-Hodgkin lymphoma xenoantigen.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00125/23599/21423.pdf

A Global Mitigation Hierarchy for Nature Conservation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Arlidge, William N. S.; Bull, Joseph W.; Addison, Prue F. E.; Burgass, Michael J.; Gianuca, Dimas; Gorham, Taylor M.; Jacob, Celine; Shumway, Nicole; Sinclair, Samuel P.; Watson, James E. M.; Wilcox, Chris; Milner-gulland, E. J.
Efforts to conserve biodiversity comprise a patchwork of international goals, national-level plans, and local interventions that, overall, are failing. We discuss the potential utility of applying the mitigation hierarchy, widely used during economic development activities, to all negative human impacts on biodiversity. Evaluating all biodiversity losses and gains through the mitigation hierarchy could help prioritize consideration of conservation goals and drive the empirical evaluation of conservation investments through the explicit consideration of counterfactual trends and ecosystem dynamics across scales. We explore the challenges in using this framework to achieve global conservation goals, including operationalization and monitoring and compliance,...
Tipo: Text
Palavras-chave: Adequacy; Biodiversity; Development; No net loss; Sustainability.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00442/55323/56831.pdf

Influence des communautés microbiennes sédimentaires sur la répartition faunistique dans les sites hydrothermaux et les zones d'émissions de fluides froids du bassin de Guaymas par Perrine Cruaud
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cruaud, Perrine.
Au niveau des fonds océaniques, souvent considérés comme des déserts aux conditions de vie extrêmes, des oasis luxuriants de vie existent pourtant. Les sources hydrothermales et les suintements froids, principalement localisés au niveau des dorsales océaniques et des marges continentales, vont permettre le développement de communautés microbiennes et animales très particulières. Le Bassin de Guaymas, situé dans le Golfe de Californie (Mexique) présente la particularité de regrouper à la fois une zone de sources hydrothermales et une zone de suintements froids, situées à une soixantaine de kilomètres l’une de l’autre, et toutes deux recouvertes par une épaisse couche sédimentaire. Ces deux zones sont également colonisées par des étendues de bivalves, des...
Tipo: Text
Palavras-chave: Bassin de Guaymas; Suintements froids; Sources hydrothermales; Communautés microbiennes sédimentaires; Colonisateurs de surface; Pyroséquençage; Q-PCR; FISH.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00407/51843/52452.pdf

Localized subduction of anthropogenic carbon dioxide in the Southern Hemisphere oceans
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sallee, Jean-baptiste; Matear, Richard J.; Rintoul, Stephen R.; Lenton, Andrew.
The oceans slow the rate of climate change by absorbing about 25% of anthropogenic carbon dioxide emissions annually. The Southern Ocean makes a substantial contribution to this oceanic carbon sink: more than 40% of the anthropogenic carbon dioxide in the ocean has entered south of 40° S. The rate-limiting step in the oceanic sequestration of anthropogenic carbon dioxide is the transfer of carbon across the base of the surface mixed layer into the ocean interior, a process known as subduction. However, the physical mechanisms responsible for the subduction of anthropogenic carbon dioxide are poorly understood. Here we use observationally based estimates of subduction and anthropogenic carbon concentrations in the Southern Ocean to determine the mechanisms...
Tipo: Text
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00140/25129/82433.pdf

Turbidity current activity along the flanks of a volcanic edifice: The mafate volcaniclastic complex, La Réunion Island, Indian Ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mazuel, Aude; Sisavath, Emmanuelle; Babonneau, Nathalie; Jorry, Stephan; Bachelery, Patrick; Delacourt, Christophe.
Recent marine geophysical surveys reveal the existence of well-developed volcaniclastic deep-sea fans around La Réunion Island, Indian Ocean. The Mafate turbidite complex, located in the northwestern part of the island, is a large sedimentary system formed by two coalescent-like volcaniclastic deep-sea fans: the Mafate fan and the Saint-Denis fan. They are both connected to terrestrial rivers supplying sediment produced by erosion on the island, particularly during austral summer cyclonic floods. Through the integration of marine geophysical data (including bathymetry, backscatter multibeam sounder images, TOBI side-scan sonar images and seismic reflection profiles) and piston cores, a submarine morpho-sedimentary map of the surface architecture of the...
Tipo: Text
Palavras-chave: Deep-sea fan; Turbidite; Volcaniclastic; Land-to-sea transfer; La Reunion Island; Late Quaternary.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00312/42273/41597.pdf

Etude écologique Englesqueville - complément d'avant-projet
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
La présente étude demandée au CNEXO par EDF, concerne le site d'Englesqueville, en Basse-Normandie, en tant que site possible pour l'éventuelle construction d'une centrale nucléaire.  Ce rapport vient compléter l'Etude Ecologique d'Avant-Projet réalise en février 1976 par le CNEXO/COB et le laboratoire de Zoologie de l'Université de Caen et qui portait sur le domaine benthique.  Le présent dossier prenant en compte les résultats d'une dizaine de campagnes à la mer, réalisées entre février et septembre 1979, étudie essentiellement le domaine pélagique. Ont été successivement abordes :  - La géographie du site, - Les caractères physico-chimiques de la masse d'eau, - Le phytoplancton et la production primaire, - Le zooplancton et la production secondaire.  En...
Tipo: Text
Ano: 1980
URL: http://archimer.ifremer.fr/doc/00005/11650/8309.pdf

Organisation, sclerotisation et composition minerale des sclerites d''une espece d'isopode marin et de quatre especes d'isopodes terrestres oniscoides
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ansenne, A; Compere, P; Goffinet, G.
The mineralized tergite cuticle of four terrestrial isopods (Oniscoidea) (Ligia oceanica, Oniscus asellus, Porcellio scaber and Armadillidium vulgare ) and of the marine isopod Sphaeroma serratum shows a general organization comparable to the fundamental plan of the decapod sclerite cuticle. Moreover, as in decapods, the procuticular layers are not tanned and mineralization rates, from 60 to 80% of the total cuticular dry weight, are of the same importance. However, the chitin protein microfibril distribution according to a homogeneous system in the mineralized procuticular proximal layer in all isopod species so far studied does not allow any comparison of this layer with the non-mineralized membranous layer.
Tipo: Text
Palavras-chave: Sphaeroma serratum; Armadillidium vulgare; Porcellio scaber; Oniscus asellus; Ligia oceanica; Isopoda; Malacostraca; Comparative studies; Mineralization.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/acte-1374.pdf

Lipid requirements of the scallop Pecten maximus (L.) during larval and post-larval development in relation to addition of Rhodomonas sauna in diet
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gagne, Renee; Tremblay, Rejean; Pernet, Fabrice; Miner, Philippe; Samain, Jean-francois; Olivier, Frederic.
The main objective of this study was to evaluate the effect of the addition of Rhodomonas salina in the diet of Pecten maximus on growth, survival and metamorphosis success in relation to biochemical content. Food quality is an essential factor in the success of larval, post-larval and juvenile development. A diet rich in polyunsaturated fatty acids present an advantage for growth, survival and metamorphosis success. Larvae and post-larvae fed with the diet containing R. sauna showed a higher accumulation of arachidonic acid (20:4n-6) and generally a lower concentration of docosahexaenoic acid (22:6n-3). Addition of R. sauna in diet was related with higher level of eicosapentaenoic acid (20:5n-3) in larval stages, but lower level in post-larvae. Addition...
Tipo: Text
Palavras-chave: Nutrition; Biochemical characteristics; Fatty acids; Sterol profiles.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00019/13045/10205.pdf

Gonad transcriptome analysis of pearl oyster Pinctada margaritifera: identification of potential sex differentiation and sex determining genes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Teaniniuraitemoana, Vaihiti; Huvet, Arnaud; Levy, Peva; Klopp, Christophe; Lhuillier, Emeline; Gaertner-mazouni, Nabila; Gueguen, Yannick; Le Moullac, Gilles.
Background  Black pearl farming is based on culture of the blacklip pearl oyster Pinctada margaritifera (Mollusca, lophotrochozoa), a protandrous hermaphrodite species. At first maturation, all individuals are males. The female sex appears progressively from two years old, which represents a limitation for broodstock conditioning for aquaculture production. In marine mollusks displaying hermaphroditic features, data on sexual determinism and differentiation, including the molecular sex determining cascade, are scarce. To increase genomic resources and identify the molecular mechanisms whereby gene expression may act in the sexual dimorphism of P. margaritifera, we performed gonad transcriptome analysis.  Results  The gonad transcriptome of P. margaritifera...
Tipo: Text
Palavras-chave: Pinctada margaritifera; Gametogenesis; Transcriptome; Differential expression; Sex determinism.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00201/31194/29593.pdf

A multiproxy study of past environmental changes in the Sea of Okhotsk during the last 1.5 Ma
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lattaud, Julie; Lo, Li; Zeeden, Christian; Liu, Ya-jun; Song, Sheng-rong; Van Der Meer, Marcel T.j.; Sinninghe Damsté, Jaap S.; Schouten, Stefan.
Long-chain diols have been detected in a wide range of environments and have been used to reconstruct past environmental changes, however only a few long-term records exist to date. Here we reconstructed past environmental changes in the central Sea of Okhotsk over the last 1.5 million years, covering the Mid-Pleistocene Transition (MPT). Sea surface temperatures (SST) reconstructed using the Long-Chain Diol Index (LDI) reflects glacial/interglacial changes. However, when compared with other organic paleothermometers (Uk’37 and TEXL86) the LDI-SST is lower during interglacials and similar or higher during glacials, possibly suggesting a shift of diol production season during interglacials. The LDI-SST does not change in periodicity around the MPT as...
Tipo: Text
Palavras-chave: Sea of Okhotsk; Mid-Pleistocene Transition; LDI; TEX86; U-37(K)'; Biogenic opal; Long-chain diols.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00489/60060/63342.pdf

Modifications à l'installation du power-block et de ses accessoires à bord du "Roselys"
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kurc, Georges; Laurent, T.
Un power-block permet depuis trois ans à l'ISTPM de procéder à des essais de pêche au filet tournant, en dépit du personnel réduit (cinq hommes d'équipage et un océanographe) embarqué à bord du "Roselys".
Tipo: Text
Ano: 1963
URL: http://archimer.ifremer.fr/doc/1963/publication-7050.pdf

Small scale fisheries in Europe: A comparative analysis based on a selection of case studies
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guyader, Olivier; Berthou, Patrick; Koutsikopoulos, C; Alban, Frederique; Demaneche, Sebastien; Gaspar, M.b.; Eschbaum, R; Fahy, E; Tully, O; Reynal, Lionel; Curtil, Olivier; Frangoudes, Katia; Maynou, Francesc.
Small-scale fisheries have traditionally received less research effort than large-scale fisheries and are generally under-studied in Europe. In spite of their comparatively low volume of catches and economic importance, small-scale fisheries are socially important and an integral part of the European coastal zone. Considering the high heterogeneity of situations and the paucity of quantitative data, we used an analytical methodology based on the comparative method. We carried out an analysis of small-scale fisheries (SSFs) in Europe based on a selection of nine case studies. Our objective was to obtain a comprehensive description of small-scale fleets covering different areas/fisheries/species, encompassing the diversity and specific conditions under which...
Tipo: Text
Palavras-chave: Small-scale fisheries; Common fisheries policy; Fleet; Indicators; Fishing rights.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00118/22934/20757.pdf

Anchovy population expansion in the North Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Petitgas, Pierre; Alheit, Juergen; Peck, Myron A.; Raab, Kristina; Irigoien, Xabier; Huret, Martin; Van Der Kooij, Jeroen; Pohlmann, Thomas; Wagner, Carola; Zarraonaindia, Iratxe; Dickey-collas, Mark.
The abundance and spatial occupation of European anchovy Engraulis encrasicolus have increased in the North Sea since the mid-1990s. We use a cross-disciplinary approach combining genetics, transport modelling, survey time series analyses and physical oceanographic modelling to investigate 3 hypotheses on the reasons for this change. Evidence from connectivity studies suggests that the population of North Sea anchovy is separate from that in the Bay of Biscay. The recruitment pulses observed in survey data fit a life cycle which includes spawning in early summer and larval development in late summer. This also supports the concept of population expansion originating from local remnant population(s). In terms of growth physiology, suitable thermal windows...
Tipo: Text
Palavras-chave: Climate variability; Small pelagic fish; Regime shift; Temperature; Anchovy; North Sea.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00060/17140/14638.pdf

Etude experimentale preliminaire sur les echanges gazeux chez Pinna nobilis
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vicente, N; Riva, A; Butler, A.
Breathing exchanges of Pinna nobilis L. are studied in situ and in the laboratory with two methods. First method consist in introducing samples of Pinna under a 40l plexiglass bell equipped with haps. The bell is positionned by diving. The consumption of oxygen is observed with water samples and the oxygen concentration is measured with an electronic oxymeter. Experiments which are carried out during nycthemeral cycles are reproduced in the laboratory with the same type of bell. A second method carry into effect an apparatus more sophisticated, who put into circulation a current of water in an airtight thermostated cellule, where a specimen of young Pinna is introduced. This sample is gradually adaptated to the conditions of the medium. Breathing...
Tipo: Text
Palavras-chave: Pinna nobilis; Bivalvia; Temperature; Metabolism; Oxygen consumption; Experimental research; Breathing mixtures; Marine molluscs.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/acte-1761.pdf

Cold seeps along the main Marmara Fault in the Sea of Marmara (Turkey)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Zitter, T; Henry, P; Aloisi, G; Delaygue, G; Cagatay, M; De Lepinay, B; Al Samir, M; Fornacciari, F; Tesmer, M; Pekdeger, A; Wallmann, K; Lericolais, Gilles.
The main Marmara Fault exhibits numerous sites of fluid venting, observed during previous cruises and in particular with R.O.V. VICTOR during the MARMARASCARPS cruise (2002). Long CALYPSO cores were recovered near active vents and at reference sites during the MARMARA-VT cruise (2004), together with echosounder sub-bottom profiles (frequency of 3.5kHz). We compiled R.O.V. video observations from MARMARASCARPS cruise and show that all known seeps occur in relationship with strike-slip faults, providing pathways for fluid migration. Among the main active sites, a distinction is made between gas seeps and water seeps. At gas seeps, bubble emissions at the seafloor or disturbed echofacies on sounder profiles demonstrate the presence of free methane gas at a...
Tipo: Text
Palavras-chave: High permeability pathways; Fault scarp; Seafloor observations; Cold seeps; Sea of Marmara.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4065.pdf

La pêche récréative au bar sur les façades atlantique, manche et mer du nord. Résultats de l'enquête 2009-2011
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Levrel, Harold; Rocklin, Delphine; Drogou, Mickael; Veron, Gerard.
Bien gérer les activités humaines et les ressources naturelles côtières nécessite de connaître de manière précise les interactions entre elles. A l'heure actuelle, la pêche professionnelle est relativement bien suivie, mais ce n'est pas le cas de la pêche récréative. En effet, cette activité est difficile à caractériser et à renseigner car elle renvoie le plus souvent à des pratiques nomades, dispersées et très hétérogènes, pour lesquelles les informations sont rares .
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00285/39592/38084.pdf

Purification and characterization of infectious myonecrosis virus of penaeid shrimp
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Poulos, Bonnie; Tang, K; Pantoja, C; Bonami, Jean-robert; Lightner, D.
The causative agent of myonecrosis affecting cultured Penaeus vannamei in Brazil was demonstrated to be a virus after purification of the agent from infected shrimp tissues. Purified viral particles were injected into specific pathogen-free P. vannamei, resulting in a disease that displayed the same characteristics as those found in the original shrimp used for purification. The virus was named infectious myonecrosis virus (IMNV). The viral particles were icosahedral in shape and 40 nm in diameter, with a buoyant density of 1(.)366 g ml(-1) in caesium chloride. The genome consisted of a single, double-stranded (dsRNA) molecule of 7560 bp. Sequencing of the viral genome revealed two non-overlapping open reading frames (ORFs). The 5' ORF (ORF 1, nt 136-4953)...
Tipo: Text
Palavras-chave: Purification; Myonecrosis; Virus; Shrimp; Penaeid.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1504.pdf

Examining the Impact of Surface Currents on Satellite Scatterometer and Altimeter Ocean Winds
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Plagge, Amanda M.; Vandemark, Douglas; Chapron, Bertrand.
A 5-yr dataset collected over two surface current and meteorological moorings allows rigorous evaluation of questions surrounding wave current interaction and the scatterometer. Results demonstrate that scatterometer winds represent winds relative to the moving sea surface, affirming previous observational efforts that inferred the phenomenon using climatological approaches over larger time and space scales in equatorial and western boundary currents. Comparisons of wind residuals between Ku-band Quick Scatterometer (QuikSCAT) and buoy measurements show nearly one-to-one correlations with ocean surface velocity for 5-, 12.5-, and 25-km resolution wind speed products, especially under conditions of moderate wind speed and near-neutral atmospheric stability....
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00118/22896/20703.pdf

Statistique des pêches maritimes - Année 1950
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Tipo: Text
Ano: 1953
URL: http://archimer.ifremer.fr/doc/00163/27385/25614.pdf

Olfactory imprinting and homing in salmon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hasler, A.
The olfactory hypothesis of the salmonids' "homing" assumes that the juvenile is conditioned to recognize a specific scent of its native river during the smolt stage and that it uses this characteristic to locate its river for upstream migration. We tested this hypothesis and exposed, in artificial conditions, some farmed coho salmon, rainbow trout and fario trout, aged 18 months, to a chemical (morpholine or alcoolphenetyl) introduced in the natural production environment (mixed with the scents of the native river), in order to determine if they will be responsive to this product to locate their initial production environment during upstream migration.
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/publication-6053.pdf

Etude biologique dans le cadre du programme "Golfe de GIENS"
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Maggi, Pierre; Gruet, Yves.
Cette étude a été conduite lors de deux campagnes de prélèvements : - du 7 au 20 Avril 1975, avec le concours du bateau RECTEUR DUBUISSON. - du 28 Juillet au 10 Août 1975 ; nous avons utilisé une embarcation pneumatique ZODIAC MARK III mise à notre disposition. Notre travail a été mené selon deux axes complémentaires : - l'étude de la vitalité de l'herbier à Posidonies (posidonia oceanica) en divers points du Golfe de Giens. - l'étude de la faune des sédiments benthiques, dans les cinq zones envisagées comme lieux de rejets possibles des effluents urbains des agglomérations riveraines du Golfe de Giens.
Tipo: Text
Ano: 1975
URL: http://archimer.ifremer.fr/doc/00045/15619/13022.pdf

N.O. Jean CHARCOT. Campagne Polymede I. 10 mai- 3 juillet 1970
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cnexo.
La campagne POLYMEDE I a été organisée par le Département Scientifique du Centre Océanologique de Bretagne et s'est déroulée essentiellement dans le bassin occidental de la Méditerranée, en mer d'Alboran et au sud du golfe de Gascogne. Ce volume contient les données recueillies durant cet te campagne à bord du navire océanographique "Jean Charcot" entre le 10 mai et le 3 juillet 1970. Afin de simplifier l'exploitation des données présentées, chacun des trajets a reçu un indicatif alphanumérique différent : Toulon-Alger (10 mai - 27 mai 1970):CH 10 Alger-Marseille (28 mai - 7 juin 1910):CH 11 Marseille-Brest (15 juin - 3 juillet 1970):CH 12
Tipo: Text
Ano: 1970
URL: https://archimer.ifremer.fr/doc/00423/53436/54332.pdf

Ascophyllum nodosum (L.) Le Jolis as a bioindicator of radioactivity in the Irish Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bourne, G S; Assinder, D J.
The response of Ascophyllum nodosum to a sudden increase in radioactivity analogous to a nuclear incident is examined in the field. super(137)Cs, super(241)Am and super(239+240)Pu showed net accumulation with exposure time, unlike natural super(228)Th, which was used as a control. Caesium had the highest accumulation rate followed by americium and finally plutonium. Younger plant sections were found to accumulate all the radionuclides significantly faster than older plant sections. Americium and plutonium were accumulated significantly faster in frond tissue than in vesicle tissue. No significant difference could be identified for caesium. These results and their implications for future monitoring surveys and modes of uptake are discussed.
Tipo: Text
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00268/37878/35959.pdf

Bacterial-viral interactions in the sea surface microlayer of a black carbon-dominated tropical coastal ecosystem (Halong Bay, Vietnam)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ram, Pradeep A. S.; Mari, X.; Brune, J.; Torreton, J. P.; Chu, V. T.; Raimbault, P.; Niggemann, J.; Sime-ngando, T.
Increasing human activity has raised concerns about the impact of deposition of anthropogenic combustion aerosols (i.e., black carbon; BC) on marine processes. The sea surface microlayer (SML) is a key gate for the introduction of atmospheric BC into the ocean; however, relatively little is known of the effects of BC on bacteria-virus interactions, which can strongly influence microbially mediated processes. To study the impact of BC on bacteria-virus interactions, field investigations involving collection from the SML and underlying water were carried out in Halong Bay (Vietnam). Most inorganic nutrient concentrations, as well as dissolved organic carbon, were modestly but significantly higher (p = 0.02-0.05) in the SML than in underlying water. The...
Tipo: Text
Palavras-chave: Black carbon; Virus-bacteria interaction; Viral lysis; Lysogeny; Sea surface microlayer; Tropical coastal ocean.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00427/53848/75163.pdf

Décongélation du poisson dans une enceinte à air chaud pulsé (Thirode)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Han Ching, Lucay; Becel, Philippe; Cornet, Josiane.
Le laboratoire atesté le prototype de décongélation Thirode utilisant l'air chaud pulsé humidifié, afin d'évaluer les performances thermiques et l'incidence sur la qualité du poisson. Les essais réalisés nous ont permis de traiter les produits de petite taille et les plaques congelées dans des temps très satisfaisants sans nuire à la qualité du poisson (ambiance humide à +20°C et grande vitesse de ventilation). En outre, nous avons constaté que la prolifération bactérienne est généralement nulle et ne s'observe que pour la décongélation des gros thons.
Tipo: Text
Ano: 1979
URL: http://archimer.ifremer.fr/doc/00119/23017/20848.pdf

Calibration of CTD oxygen data collected in the Coral Sea during the 2012 BIFURCATION Cruise
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Saout Grit, Carole; Ganachaud, Alexandre; Maes, Christophe; Finot, L; Jamet, L; Baurand, Francois; Grelet, Jacques.
An updated procedure for a CTD-oxygen calibration along with new data processing was applied to recent hydrographic cruise data in the Coral Sea during the Cruise “BIFURCATION” in September 2012. After a brief introduction with the scientific context (section 1), we describe the contents and acquisition models of hydrological and chemical data that are used for the calibration (section 2), the post-cruise calibration method (section 3) and the calibration results (section 4).
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00272/38321/36562.pdf

Economie et droit des ressources naturelles renouvelables de la mer - aspects théoriques et application à la zone côtière de la manche occidentale française - tome 1 - etude economique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bailly, Denis; Boncoeur, Jean; Guyader, Olivier; Le Floc'H, Pascal.
Le premier tome de ce rapport est consacré aux aspects économiques du problème de l'aménagement des usages des ressources et écosystèmes marins et littoraux. Il comporte deux parties : • La première offre une grille de lecture économique du problème étudié par le programme AMURE. • La seconde présente les résultats d'une enquête menée en mai-juin 1996 sur le littoral de la zone-atelier du programme.
Tipo: Text
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00082/19300/16894.pdf

Variation spatio-temporelle de la température et de la salinité. Sous-région marine Golfe de Gascogne. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vandermeirsch, Frederic.
Tipo: Text
Palavras-chave: Golfe de Gascogne; Masse d'eau; Température; Salinité; Variation spatio-temporelle; Processus hydrologiques.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00329/44002/43574.pdf

Campagne de surveillance DCE 2015 en Méditerranée française. Districts « RHONE ET COTIERS MEDITERRANEENS » ET « CORSE »
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Witkowski, Fanny; Andral, Bruno; Derolez, Valerie; Tomasino, Corinne.
Sur la façade méditerranéenne, l'Ifremer a assuré en 2015 une partie logistique de la quatrième campagne du contrôle de surveillance DCE et la coordination de la caractérisation de plusieurs éléments de qualité. Les résultats de la quatrième campagne de contrôles de surveillance DCE permettent de caractériser la qualité de 45 masses d’eau littorales suivies en 2015. Dans le district « Rhône et côtiers méditerranéens » (volet 1), 3 des 18 masses d’eau côtières (MEC) sont déclassées pour la chimie au regard des résultats acquis dans la matière vivante, tandis que l'ensemble des MEC suivies pour le phytoplancton affichent un bon état. Dans les masses d’eau de transition (MET), la chimie matière vivante déclasse 7 MET, le suivi dans l'eau (échantillonneurs...
Tipo: Text
Palavras-chave: Surveillance; Phytoplancton; Macrophytes; Substances prioritaires; Bioaccumulation; État biologique; État chimique; Eaux côtières; Eaux de transition.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00394/50583/51272.pdf

Avis de l'Ifremer sur le Dossier environnemental de renouvellement de concession Perle de Binic
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Mao, Patrick; Cheve, Julien; Garcia, Celine; Rollet, Claire.
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00641/75298/75778.pdf

Les déterminants de la trajectoire économique d'une pêcherie complexe : cas de la pêche française dans le golfe de Gascogne
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Steinmetz, Fabien.
The average trophic level of the landings of the species landed by the french fleets in the Bay of Biscay is dropping since 30 years, according to the worldwide range observations of Daniel Pauly. The effects of the ecosystemic, institutional and economic factors of this drop are studied with two complementary approaches, a time series analysis and the interpretation of the phenomenons thanks to a bio-economic model. The major factors which could interact with the exploitation from 1973 to nowadays have been analysed. The short term study of the productions and the productivity of tree large trawler fleets from south brittany showed that they adapted according to their specificities to the constraints enforced by the stocks or the prices. At the larger...
Tipo: Text
Palavras-chave: Economie des ressources naturelles renouvelables; Modélisation bioéconomique; Théorie du producteur et du consommateur; Approche éco-systémique; Théorie des indices; Analyse de données; Chaîne trophique; Pêche fraîche française; Golfe de Gascogne.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00032/14278/11560.pdf

Observations ichtyologiques effectuées en 1980
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Quero, J.c.; Decamps, P.; Duron, M.; Fonteneau, J.
The authors give the distinctive characters of Lamna nasus, Isurus oxyrinchus and Carcharodon carcharias. They give data on the catch of Raja 1nicroocellata and its range in the Bay of Biscay, Raniceps raninus off Southwestern Oleron island, Zenopsis conchifer in the Bay of Biscay and off Southwestern Ireland, Cepola macrophthalma from Pertuis Charentais and a blue-fin tunny of about 400 kg.
Tipo: Text
Ano: 1981
URL: http://archimer.ifremer.fr/doc/00413/52444/53227.pdf

Seasonal budgets of organic matter in the Ubatuba shelf system, SE Brazil. I. Planktonic and benthic components
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rocha, Gra; Rossi-wongtschowski, Cldb; Pires-vanin, Ams; Jarre-teichmann, A.
Planktonic and benthic productivity and consumption were estimated to assess the availability of food to higher trophic-level consumers in the Ubatuba ecosystem on the SE coast of Brazil. The study area included waters from 10 to 100 m deep and covered 3800 km(2). The trophic compartments of the system were established on ecologically or taxonomically related species, considering their relative abundance and similarity of diets and habits. The compartments are phytoplankton, zooplankton, salps, bacterioplankton, cnidaria, polyplacophora, mollusca, carnivorous benthos, detritivorous polychaetes, other detritivorous benthos, penaeidea-caridea, brachyura, and echinodermata. Biomass, production, and consumption were estimated in summer and winter. Plankton...
Tipo: Text
Palavras-chave: Biomasse; Production; Consommation; Subtropical; Atlantique Ouest; Biomass; Production; Consumption; Subtropical; Western Atlantic.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00321/43241/42970.pdf

Etude sur la périodicité de l'échantillonnage biologique du vivaneau (Lutjanus purpureus) en Guyane
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lampert, Luis.
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00158/26937/25076.pdf

Qualité du Milieu Marin Littoral. Bulletin de la surveillance 2019. Départements du Nord, du Pas‐de‐Calais et de la Somme
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lefebvre, Alain; Devreker, David; Blondel, Camille; Cordier, Remy; Duquesne, Vincent; Hebert, Pascale; Verin, Francoise; Lebon, Fabien.
Ce document constitue une synthèse régionale des principaux résultats acquis par le Laboratoire Environnement et Ressources du centre Ifremer de Boulogne‐sur‐Mer (LER‐BL). Ces résultats concernent les réseaux mis en oeuvre à l’échelle nationale : le REMI (microbiologie), le REPHY (phytoplancton &amp; phycotoxines) et le ROCCH (contaminants chimiques). Les particularités environnementales régionales peuvent mener au déploiement d’autres réseaux ou d’autres études dont les résultats font l’objet d’une valorisation spécifique. C’est le cas des réseaux SRN, IGA et MAREL Carnot sur notre littoral (voir §4. Conditions environnementales). L’amélioration des connaissances passe également par la mise en oeuvre d’études et de recherches dont les objectifs et les...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00641/75279/75591.pdf

On denoising satellite altimeter measurements for high-resolution geophysical signal analysis
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Quilfen, Yves; Chapron, Bertrand.
Satellite radar altimeter observations are key to advanced studies in ocean dynamics, particularly those focusing on mesoscale processes. To resolve scales below about 100 km, because altimeter measurements are often characterized by a low signal-to-noise ratio (SNR), low-pass filtering or least-squares curve fitting is generally applied to smooth the data before analysis. Here, we present an alternative method. It is based on Empirical Mode Decomposition (EMD) developed to analyze non-stationary and non-linear processes, which adaptively projects a signal on a basis of empirical AM/FM functions called Intrinsic Modulation Functions (IMFs). Applied to a Gaussian noise signal, the EMD provides a set of IMFs with a predictable distribution of noise energy...
Tipo: Text
Palavras-chave: Altimeter Measurement Noise; Empirical Mode Decomposition; Mesoscale Variability.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00604/71627/70073.pdf

Les contraintes et les perspectives de développement de l'élevage de la coquille Saint-Jacques en France
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fleury, Pierre-gildas; Paquotte, Philippe.
L'élevage des Pectinidés (famille des pétoncles et coquilles Saint-Jacques) a connu dans le monde quelques développements spectaculaires : Japon, Chine, Nouvelle-Zélande, Tasmanie (Dao, 1997). En France, des efforts importants en matière de recherche et développement ont été portés sur cet élevage : 2 contrats de plan Etat-région Bretagne (Dao et al. 1994), le contrat de baie Rade de Brest (Dao et al. 1996) et une action concertée européenne (Fleury et al. 1997). Mais la production reste encore marginale (100-150 t /an).
Tipo: Text
Ano: 1997
URL: http://archimer.ifremer.fr/doc/1997/acte-7305.pdf

Qualité du Milieu Marin Littoral. Bulletin de la surveillance 2015. Départements du Nord, du Pas-de-Calais et de la Somme
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer.
Tipo: Text
Palavras-chave: MAREL Carnot; REMI; REPHY; ROCCH; DCE.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00343/45419/44933.pdf

A comparison of surface eddy kinetic energy and Reynolds stresses in the Gulf Stream and the Kuroshio Current systems from merged TOPEX/Poseidon and ERS-1/2 altimetric data
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ducet, N; Le Traon, Pierre-yves.
Analyses of surface eddy kinetic energy (EYE) inferred from 5 years of merged TOPEX/Poseidon and ERS-1/2 altimetric data are presented in the Gulf Stream (GS) and the Kuroshio (KS) Current systems, focusing on anisotropy and EKE seasonal, interannual, and long-term variations, as well as Reynolds stresses. For both GS and KS a descriptive analysis of the EKE field shows that it is anisotropic along the path of the currents and assesses the close relationship between the spatial distribution of EKE high levels and bottom topography. A striking ocean feature is found in the GS, shaped as a zonal "double-blade" structure in the EKE field, centered at 37 degrees N, 71.5 degrees W, that likely corresponds to a regular and permanent lateral displacement of the...
Tipo: Text
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00084/19476/17095.pdf

Permanent features of the circulation in the Catalan Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Font, J; Salat, J; Tintore, J.
Through the analysis of hydrographic data collected during 16 cruises (1975-1985), we identify and describe the seasonal characteristics and the permanent features of the circulation in the Catalan Sea (north-western Mediterranean). Two fronts follow the continental shelf break on the peninsular and Balearic sides, separating the central dense waters from the surrounding lighter waters of Atlantic and continental origins. One is mainly produced by strong salinity gradients (Catalan front) and the other by temperature gradients (Balearic front). Two currents are associated with these fronts: the southwest Catalan current and the northeast Balearic current. Strong vertical mesoscale motions have been observed on several occasions in the weakly stratified...
Tipo: Text
Ano: 1988
URL: http://archimer.ifremer.fr/doc/00267/37808/35889.pdf

Synthèse des études écologique et halieutique du site de Flamanville de 1983 à 1991
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Angely, C; Bordet, F.
Située sur la côte ouest du Cotentin, la centrale de Flamanville comporte deux tranches de puissance électrique nette nominale de 1300 MWe environ, mises en service en décembre 1986 pour la tranche 1 et en mars 1987 pour la tranche 2. Depuis 1976, de nombreuses études écologiques et halieutiques ont été réalisées pour connaitre le milieu marin au voisinage du site de Flamanville, et surveiller l'évolution de la flore et de la faune aquatiques après la mise en service de la centrale.
Tipo: Text
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00005/11659/8318.pdf

Long-term disruption of growth, reproduction, and behavior after embryonic exposure of zebrafish to PAH-spiked sediment
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vignet, Caroline; Devier, Marie-hélène; Le Menach, Karyn; Lyphout, Laura; Potier, Jeremy; Cachot, Jerome; Budzinski, Helene; Begout, Marie-laure; Cousin, Xavier.
A natural sediment spiked with three individual polycyclic aromatic hydrocarbons (PAHs; pyrene, phenanthrene and benzo[a]pyrene) was used to expose zebrafish embryos and larvae during 4 days. The total PAH concentration was 4.4 μg g−1 which is in the range found in sediment from contaminated areas. Quantification of metabolites in the larvae after exposure confirmed the actual contamination of the larvae and indicated an active metabolism especially for pyrene and benzo[a]pyrene. After a transfer in a clean medium, the larvae were reared to adulthood and evaluated for survival, growth, reproduction, and behavior. Measured endpoints revealed a late disruption of growth (appearing at 5 months) and a trend toward a lower reproductive ability. Adults of...
Tipo: Text
Palavras-chave: Danio rerio; Polycyclic aromatic hydrocarbon; Lifecycle; Anxiety-like behavior; Offspring.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00188/29909/28497.pdf

Is the distribution of Prochlorococcus and Synechococcus ecotypes in the Mediterranean Sea affected by global warming?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mella-flores, D.; Mazard, S.; Humily, F.; Partensky, F.; Mahe, F.; Bariat, L.; Courties, C.; Marie, D.; Ras, J.; Mauriac, R.; Jeanthon, C.; Bendif, El Mahdi; Ostrowski, M.; Scanlan, D. J.; Garczarek, L.
Biological communities populating the Mediterranean Sea, which is situated at the northern boundary of the subtropics, are often claimed to be particularly affected by global warming. This is indicated, for instance, by the introduction of (sub) tropical species of fish or invertebrates that can displace local species. This raises the question of whether microbial communities are similarly affected, especially in the Levantine basin where sea surface temperatures have significantly risen over the last 25 years (0.50 +/- 0.11 degrees C in average per decade, P &lt; 0.01). In this paper, the genetic diversity of the two most abundant members of the phytoplankton community, the picocyanobacteria Prochlorococcus and Synechococcus, was examined during two...
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00133/24402/22413.pdf

Contribution to the ICES Report on Ocean Climate : North Atlantic Ocean in 2017
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kolodziejczyk, Nicolas; Reverdin, Gilles; Desbruyeres, Damien.
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00481/59296/61988.pdf

North Atlantic Western Boundary Currents Are Intense Dissolved Organic Carbon Streams
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fontela, Marcos; Pérez, Fiz F; Mercier, Herle; Lherminier, Pascale.
In the North Atlantic, there are two main western boundary currents related to the Atlantic Meridional Overturning Circulation (AMOC): the Gulf Stream flowing northward and the Deep Western Boundary Current (DWBC) flowing southward. Here we analyze data from the OVIDE section (GO-SHIP A25 Portugal-Greenland 40–60°N) that crosses the DWBC and the northward extension of the Gulf Stream, the North Atlantic Current. We show that North Atlantic western boundary currents play a key role in the transport of dissolved organic matter, specifically dissolved organic carbon (DOC). Revisited transports and budgets of DOC with new available data identify the eastern Subpolar North Atlantic (eSPNA) as an important source of locally produced organic matter for the North...
Tipo: Text
Palavras-chave: Dissolved organic carbon; North Atlantic; Carbon budget; Carbon dioxide; Biogeochemistry; Atlantic Meridional Overturning Circulation.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00661/77268/78702.pdf

CGFS 2016 - Survey Report
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Travers-trolet, Morgane; Coppin, Franck.
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00358/46944/46850.pdf

Analyse historique de la production conchylicole du Bassin de Marennes-Oléron et essai d'estimation empirique du potentiel conchylicole
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Heral, Maurice; Deslous-paoli, Jean-marc.
The analysis of the official statistics of commercialised production of oysters (.Crassostrea angutata and Crassostrea gigas ) is achieved from 1866 to 1984 in term of their numbers and weights for the bay of Marennes-Oleron. The number of sanitary labels, multiplied by the mean weight of a crate can also give out the commercialised production   provided it is increased by the bias and decreased by the exterior production of the bay . Thus the production of Portuguese oysters is only 45 000 tons from 1948 to 1957 with a  maximum of 52, 000 tons for respectively 70 000 tons and 280 000 tons for the statistics . AIso, after the epizooties of Crassostrea angulata the production, fell down to 25 000 tons in 1971 according to the number of sanitary labels...
Tipo: Text
Palavras-chave: Crassostrea gigas; Production conchylicole; Analyse statistique.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/0985/acte-2958.pdf

Acoustic observations in the Bay of Biscay: Schooling, vertical distribution, species assemblages and behaviour
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Masse, Jacques.
Eight acoustic surveys were carried our in the Bay of Biscay, during 1989-94, to study the distribution and abundance of anchovy (Engraulis encrasicolus, L.) in that area. Acoustic data were stored using the INES/MOVIES acquisition and processing system. Species-specific distribution patterns were confirmed through complementary sampling with a mid-water trawl. This paper summarises the combination of technical procedures used for acoustic assessments, and the results of acoustic surveys in the Bay of Biscay that pertain to the dynamics of this stock. Information is presented on the distribution and abundance of anchovy and co-occuring species, and on the movement patterns detected within the pelagic fish community, in relation to environmental conditions....
Tipo: Text
Palavras-chave: Acoustic; Anchovy; Engraulis encrasicolus; Schooling; Pelagic; Behaviour; Bay of Biscay.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00191/30265/28719.pdf

Detecting hydrological landscapes over the Bay of Biscay continental shelf in spring
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Planque, Benjamin; Lazure, Pascal; Jegou, Anne-marie.
A complex set of hydrodynamical structures co-exist over the Bay of Biscay continental shelf. These structures, which can spread over a limited spatial range (10s of km) and last for periods ranging from days to months, influence the rates and nature of biological production. They need to be accurately described before the mechanisms linking hydrodynamics to production can be unraveled. Such description generally requires not only 3D observations of hydrological fields (temperature, salinity, density), but also a description of how these fields vary with time. This is hardly achievable with current means of field observation but can be mimicked by hydrodynamic model simulations. Using simulations from a 3D hydrodynamic model, we developed a methodology...
Tipo: Text
Palavras-chave: Bay of Biscay; Hydrology; Hydrodynamic model; Spring; Typology.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/00000/10933/7575.pdf

Réseau de Suivi Lagunaire du Languedoc-Roussillon. Bilan des résultats 2004
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer.
Ce rapport présente le bilan des résultats des actions programmées dans le cadre du Réseau de Suivi Lagunaire en 2004 : • Les diagnostics de l’eau et du phytoplancton ont été réalisés sur les 23 lagunes du Languedoc-Roussillon suivis dans le cadre du réseau, et le Canal du Rhône à Sète, • Le deuxième cycle de diagnostics complets s’est poursuivi avec la lagune de Salses-Leucate, dont le dernier diagnostic complet remontait à 1999. L’étang de la Marette et le Rhône de St Roman, ajoutés en 2003 aux lagunes du réseau, ont également fait l’objet d’un diagnostic complet, • Comme les années précédentes sont restitués les résultats des autres réseaux de surveillance opérés par l’Ifremer (REMI, REPHY, RNO, REMORA, REPAMO). Cette année, un point particulier est...
Tipo: Text
Ano: 2005
URL: http://archimer.ifremer.fr/doc/00274/38558/37080.pdf

Analyse de la pecherie de petoncle noir et de coquille Saint-Jacques de la rade de Brest
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Merrien, A.
For the fourth consecutive year, the fishing returns of the shelly season of the roads of Brest are analyzed. For the black Scallop, principal species currently exploited, the goal is to know the evolution of the fisheries. For the shell St Jacques, season 86-87 saw a light improvement of the captures due to a good recruitment during summer 84. In the first chapter the general conditions of the unfolding of the countryside are treated, in the following are analyzed the captures of black scallop then of shell St Jacques. In appendix the data of effort and production of the other species during the season appear.
Tipo: Text
Palavras-chave: Split of Brest; Capture; Scallop; Black scallop; Fishing.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/rapport-1537.pdf

Les activités  du bateau pilote de pêche Donibane
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Percier, Albert.
La pêche à la sardine ne représente qu'une faible part de la pêche française; elle est cependant d'une grande importance sur le plan économique et social. Pratiquée pendant quelques mois de l'année par de petites unités de type artisanal montées par des équipages de 5 à 15 hommes elle est la principale source de revenus de nombreux marins les autres activités: petit chalutage côtier dragage des coquillages casiers, palangres, ne constituant pour eux qu'un complément. D'autre part. on ne doit pas oublier qu'elle approvisionne les usines de conserves du littoral lesquelles emploient une main-d'oeuvre nombreuse essentiellement recrutée dans le milieu des pêcheurs,   La pêche à la sardine, comme beaucoup d'autres activités artisanales est très irrégulière en...
Tipo: Text
Ano: 1959
URL: http://archimer.ifremer.fr/doc/1959/publication-4488.pdf

La famille des Haploniscide (Isopodes, Asellotes) : discussion systématique et phylogénique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chardy, Pierre.
Systematic of the Haploniscidae family is cleared by two approaches : phenetic relationships between species through a multiple criteria analysis and phylogenetic attempt based on a few number of characters of which the evolutive meaning is discussed. Choice and coding of characters, taxonomic distance and mathematical methods are commented. Phenetic classification is expressed by two complementary techniques : ordination (Analysis of Correspondences, CORDIER, 1966) and hierarchy (cluster analysis of Roux, 1968). The resulting scheme provides a picture of the morphological affinities between the 5 genus and the 73 species of this family ; divisions inside genus Haploniscus are defined. A phylogenetic hypothesis, deduced by the minimum steps methods for...
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1977
URL: http://archimer.ifremer.fr/doc/1977/publication-5009.pdf

Occurrence of venlafaxine residues and its metabolites in marine mussels at trace levels: development of analytical method and a monitoring program
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bueno, M. J. Martinez; Boillot, C.; Munaron, Dominique; Fenet, H.; Casellas, C.; Gomez, E.
Coastal areas are subject to growing pressures and impacts due to increasing of the human activities. Lipophilic organic contaminants, such as polycyclic aromatic hydrocarbons (PAHs) or polychlorinated biphenyls (PCBs), have been monitored for decades within biomonitoring programs. However, until now, little information on the detection of called “emerging contaminants” as hydrophilic organic compounds, in the marine environment and no data on its metabolites or transformation products in marine organisms is available. In this way, a sensitive analytical methodology for identification and confirmation of venlafaxine residues (VEN) and five of its main metabolites in the marine mussels Mytilus galloprovincialis was validated. The sample preparation...
Tipo: Text
Palavras-chave: Antidepressant; Emerging contaminants; Transformation products; Marine organisms; Orbitrap; QuEChERS.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00168/27877/26123.pdf

Sedimentary archives of climate and sea-level changes during the Holocene in the Rhone prodelta (NW Mediterranean Sea)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fanget, Anne-sophie; Bassetti, Maria-angela; Fontanier, Christophe; Tudryn, Alina; Berne, Serge.
A 7.38 m-long sediment core was collected from the eastern part of the Rhone prodelta (NW Mediterranean) at 67 m water depth. A multi-proxy study (sedimentary facies, benthic foraminifera and ostracods, clay mineralogy, and major elements from XRF) provides a multi-decadal to century-scale record of climate and sea-level changes during the Holocene. The early Holocene is marked by alternative silt and clay layers interpreted as distal tempestites deposited in a context of rising sea level. This interval contains shallow infra-littoral benthic meiofauna (e.g. Pontocythere elongata, Elphidium spp., Quinqueloculina lata) and formed between ca. 20 and 50 m water depth. The middle Holocene (ca. 8.3 to 4.5 ka cal. BP), is characterized, at the core site, by a...
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00345/45591/45203.pdf

Impact of ocean-atmosphere current feedback on the ocean mesoscale activity: regional variations, and sensitivity to model resolution
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Jullien, Swen; Masson, Sébastien; Oerder, Véra; Samson, Guillaume; Colas, François; Renault, Lionel.
Ocean mesoscale eddies are characterized by rotating-like and meandering currents that imprint the low-level atmosphere. Such a current feedback (CFB) has been shown to induce a sink of energy from the ocean to the atmosphere, and consequently to damp the eddy kinetic energy (EKE), with an apparent regional disparity. In a context of increasing model resolution, the importance of this feedback, and its dependence on oceanic and atmospheric models resolution arise. Using a hierarchy of quasi-global coupled models with spatial resolutions varying from ¼° to 1/12°, the present study shows that the CFB induces a negative wind work at scales ranging from 100 to 1000 km, and a subsequent damping of the mesoscale activity by ∼30% on average, independently of the...
Tipo: Text
Palavras-chave: Currents; Feedback; Mesoscale processes; Air-sea interaction; Coupled models; Mesoscale models.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00601/71329/69759.pdf

Maladies des coquillages. Maladies infectieuses : réalités, recommandations, prévention. Fiche pratique n°9
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ravoux, Georges; Joly, Jean-pierre; Piquion, Jean-claude.
Intended for shellfish farming professionals, this series of fact sheets provides practical information to help improve knowledge and farming practices, thereby making their business more efficient. Not meant to be exhaustive, these fact sheets address the key points on a specific topic to facilitate access to further information.
Tipo: Text
Ano: 1993
URL: http://archimer.ifremer.fr/doc/1993/rapport-4338.pdf

Voluntary feed intake and discrimination of diets containing a novel fluoroquinolone in self-fed rainbow trout
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boujard, Thierry; Le Gouvello, Raphaela.
The objective of the study was to evaluate the capacity of rainbow trout to discriminate diets containing micro-granulated or powdered novel fluoroquinolone in comparison with a positive (containing sulfamerazine sodium) and a negative control (placebo). In a first trial, groups of trout had access to a self-feeder containing the placebo feed for 10 days, and then to one of the four feeds during another period of 10 days. Fish reduced their voluntary feed intake (VFI) by more than 50 % when they had access to the positive control, and by more than 20 % when they had access to feed containing micro-granulated premix. There was no significant decrease in VFI when the fish had access to feed containing powdered premix, but in this latter case, an increase in...
Tipo: Text
Palavras-chave: Truite arc-en-ciel; Distributeurs à la demande; Appétit; Acceptabilité; Antibiotiques; Oncorhynchus mykiss; Rainbow trout; Self-feeding; Voluntary feed intake; Antibiotics.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00335/44651/57341.pdf

Euro-Argo ERIC Activity Report 2014-2018
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Euro-Argo ERIC.
The Euro-Argo European Research Infrastructure Consortium (ERIC) provides in situ ocean observations to a range of user communities, with an interest in the ocean’s state and its evolution. Euro-Argo ERIC aims at maintaining one quarter of the international Argo network, one of the most important components of the Global Ocean Observing System (GOOS). Since 2014, the Euro-Argo ERIC Members joined their effort to get a better grasp of climate change, but also to support operational coeanography and to serve marine ecosystem health. This report summarizes the last five years main achievements and tells the story of the ERIC first steps.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00601/71339/70632.pdf

Reproduction de l'huître creuse dans le Bassin d'Arcachon Année 2007
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Maurer, Daniele; Auby, Isabelle; Vignon, Alan; Tournaire, Marie-pierre; Rumebe, Myriam; Neaud-masson, Nadine; Cantin, Christian; Flora, Salvo; Debort, Henriette; Navarro, Romuald; Simonnet, Bastien.
Each summer, the IFREMER laboratory of Arcachon monitors, in the scope of an agreement with the regional conchological section of Arcachon (SRC), the reproduction of flat oysters in the Arcachon Bay.  This monitoring aims to provide oyster farmers with information necessary to the spat collecting: - dates and amount of spawn, - larval development speed, - presence of the most evolved stages in the habitat (close to fixation).  Reproduction is monitored from mid-June to mid-September, with plankton being sampled four times a week on different representative sites. Oyster larvae at different stages are counted.  At the end of the reproduction period (September-October), larval recruitment on collectors is estimated via the counting of the spats collected on...
Tipo: Text
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/rapport-3471.pdf

Programmes de surveillance DCSMM 1er cycle « Espèces commerciales » et « Poissons-céphalopodes (SP3-SP5) » : analyse des liens avec les politiques européennes, les accords internationaux et autres Etats-membres.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Baudrier, Jerome.
Les programmes de surveillance adoptés en juin 2015 (PdS DCSMM 1er cycle) constituent le quatrième élément des plans d’actions pour le milieu marin (article 11 de la Directive 2008/56/CE dite « DCSMM »). Leur objectif est de collecter des données en vue de l’évaluation permanente de l’état écologique des eaux marines, de la mise à jour périodique des objectifs environnementaux et de l’évaluation de l’efficacité des mesures. L’Ifremer assure la coordination thématique des PdS « Espèces commerciales » et « Poissons-céphalopodes (SP3-SP5) ». Cette note dresse une analyse de ces programmes au regard des autres politiques européennes, des accords internationaux et suivis conjoints ou coordonnés avec des Etats-membres voisins.
Tipo: Text
Palavras-chave: DCSMM; Programme de surveillance; Data Collection Framework.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00511/62243/66446.pdf

Marine litter, future prospects for research
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Galgani, Francois.
As far back as 1870, i.e., about 150 years ago, Jules Verne described the accumulation of debris in the convergence zone of the North Atlantic Ocean in his famous novel entitled “Twenty Thousand Leagues under the Sea.” Many scientific reports have addressed this topic since and our main concern today is the ever increasing volume of marine litter invading the oceans in various and complex ways. One of the current main challenges is assessing the final destination of this litter. To date, its adverse effects on marine life have only occasionally been investigated and many questions remain unanswered. In addition to efforts to monitor and reduce litter, recent literature has underlined the scientific community's focus on specific issues such as (i) the...
Tipo: Text
Palavras-chave: Marine litter; Microplastics; Marine debris; Trophic chains; Chemicals; Rafting.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00358/46933/46837.pdf

Epimeria of the Southern Ocean with notes on their relatives (Crustacea, Amphipoda, Eusiroidea)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: D'Udekem D'Acoz, Cedric; Verheye, Marie L.
The present monograph includes general systematic considerations on the family Epimeriidae, a revision of the genus Epimeria Costa in Hope, 1851 in the Southern Ocean, and a shorter account on putatively related eusiroid taxa occurring in Antarctic and sub-Antarctic seas. The former epimeriid genera Actinacanthus Stebbing, 1888 and Paramphithoe Bruzelius, 1859 are transferred to other families, respectively to the Acanthonotozomellidae Coleman &amp; J.L. Barnard, 1991 and the herein re-established Paramphithoidae G.O. Sars, 1883, so that only Epimeria and Uschakoviella Gurjanova, 1955 are retained within the Epimeriidae Boeck, 1871. The genera Apherusa Walker, 1891 and Halirages Boeck, 1891, which are phylogenetically close to Paramphithoe, are also...
Tipo: Text
Palavras-chave: Alexandrella; Amphipoda; Epimeria; Eusiroidea; Senticaudata; Southern Ocean.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00406/51743/52328.pdf

Problems and perspectives of the pearl oyster aquaculture in French Polynesia.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cabral, P.
The first attempt to obtain artificial pearls from the black-lip pearl oyster Pinctada margaritifera in French Polynesia dates back to 1963. The pearl oyster culture has grown quickly especially since the eighties. This industry is now the first exportation in value of French Polynesia. 19 atolls of the Tuamotus island have at this time one or more farms and this activity has more and more attractiveness. The rise of this industry has consequently a lot of socio-ecomic repercussions on these atolls. However, as a young industry, the technics and the development are not always controlled and a lot of problems appeared these last years.
Tipo: Text
Palavras-chave: French Polynesia; Pinctada margaritifera; Trade; Economic analysis; Harvesting; Hatcheries; Spat; Lagoons; Mortality; Oyster culture; Pearl oysters.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1494.pdf

French National Report on Argo -­ 2013. Present status and future plans
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Maze, Guillaume; Cabanes, Cecile; Coatanoan, Christine; D'Ortenzio, Fabrizio; Lebreton, Nathanaele; Le Reste, Serge; Le Traon, Pierre-yves; Mamaca, Emina; Pouliquen, Sylvie; Thierry-theetten, Virginie.
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00180/29100/27514.pdf

A multiple corer for taking virtually undisturbed samples from shelf, bathyal and abyssal sediments
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Barnett, Pro; Watson, J; Connelly, D.
Tipo: Text
Ano: 1984
URL: http://archimer.ifremer.fr/doc/00113/22438/20125.pdf

On the experimental study of the flow around a fishing net
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pichot, Geraldine; Germain, Gregory; Priour, Daniel.
Selectivity of fishing gears like trawls is obviously conditioned by the fish behaviour but also by the net and the flow. As well, flow may affect fish behaviour. With the aim of a better understanding of the flow in presence of a net and a catch, we suggest, through the experimental study below, to determine and to analyze the flow over a rigid cod-end in two configurations: with a closed and an open net entrance. Trials took place in a free surface flume tank and the flow characteristics were determined from velocity measurements obtained by laser velocimetry (inside, outside and through the meshes of the stiff cod-end). The experimental device, the measures and their analyzes are given here.
Tipo: Text
Palavras-chave: Turbulence; Laser velocimetry; Fluid structure interactions; Experimental study; Hydrodynamics; Fluid mechanics.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-4701.pdf

Taxonomic Re-Investigation and Geochemical Characterization of Reid’s (1974) Species of     Spiniferites     from Holotype and Topotype Material
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gurdebeke, Pieter R.; Mertens, Kenneth; Bogus, Kara; Marret, Fabienne; Chomerat, Nicolas; Vrielinck, Henk; Louwye, Stephen.
The genus Spiniferites currently encompasses 142 dinoflagellate cyst species. Some Spiniferites species are difficult to identify because of an incomplete or doubtful description, and/or substandard iconography. This study re-describes and re-illustrates the Spiniferites holotypes first described by Reid in 1974 Reid PC. 1974. Gonyaulacacean dinoflagellate cysts from the British Isles. Nova Hedwigia. 25:579–637. [Google Scholar]. It also discusses topotype material from surface sediments recovered from British estuaries, and attempts to provide further constraints on the classification of species in this genus using the geochemical characterization of their cyst walls. Reid described four new Spiniferites species: Spiniferites belerius, Spiniferites...
Tipo: Text
Palavras-chave: Dinoflagellate cyst; Redescription; Taxonomy; Geochemistry; Cyst wall composition; FTIR; Dinosporin.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00471/58306/60847.pdf

The Douro estuary (Portugal): a mesotidal salt wedge
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vieira, Mario Ec; Bordalo, Adriano A.
The Douro River drains a large part of the Iberian Peninsula before it flows into the Atlantic Ocean in northern Portugal. Although heavily dammed throughout its course, the Douro forms a mesotidal estuary in the last 22 km. Na data had ever been collected in this estuary prior to 1994. An analysis of salinity data measured once a month in 1994 and current data obtained in the fall of 1994 revealed a salt wedge estuary highly dependent on river discharge: strong vertical salinity stratification under conditions of low runoff, whereas during high river flows the whole estuary became a river. The tide in the fall of 1994 was very close to a standing wave throughout the estuary; the tidal range, as high as 2.8 m at spring tides, was not powerful enough to...
Tipo: Text
Palavras-chave: Circulation estuariene; Coin salé; Modèle en boı̂te; Temps de residence; Douro; Estuarine circulation; Salt wedge; Box model; Residence time; Douro River.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00323/43382/42829.pdf

A Feedback Mechanism to Control Apoptosis Occurs in the Digestive Gland of the Oyster Crassostrea gigas Exposed to the Paralytic Shellfish Toxins Producer Alexandrium catenella
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rolland, Jean-luc; Medhioub, Walid; Vergnes, Agnes; Abi-khalil, Celina; Savar, Veronique; Abadie, Eric; Masseret, Estelle; Amzil, Zouher; Laabir, Mohamed.
To better understand the effect of Paralytic Shellfish Toxins (PSTs) accumulation in the digestive gland of the Pacific oyster, Crassostrea gigas, we experimentally exposed individual oysters for 48 h to a PSTs producer, the dinoflagellate Alexandrium catenella. In comparison to the effect of the non-toxic Alexandrium tamarense, on the eight apoptotic related genes tested, Bax and BI.1 were significantly upregulated in oysters exposed 48 h to A. catenella. Among the five detoxification related genes tested, the expression of cytochrome P450 (CYP1A) was shown to be correlated with toxin concentration in the digestive gland of oysters exposed to the toxic dinoflagellate. Beside this, we observed a significant increase in ROS production, a decrease in...
Tipo: Text
Palavras-chave: Shellfish; Toxin; Biomarker; Expression; Phytoplankton.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00225/33606/32003.pdf

Demande d’avis / Extension de la station d'épuration de SAINT-QUAY-PORTRIEUX. Dossier d'autorisation environnementale
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cheve, Julien; Rollet, Claire.
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00453/56469/79454.pdf

A unique in vivo experimental approach reveals metabolic adaptation of the probiotic Propionibacterium freudenreichii to the colon environment
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Saraoui, Taous; Parayre, Sandrine; Guernec, Gregory; Loux, Valentin; Montfort, Jerome; Le Cam, Aurelie; Boudry, Gaelle; Jan, G; Falentin, Helene.
Background  Propionibacterium freudenreichii is a food grade bacterium consumed both in cheeses and in probiotic preparations. Its promising probiotic potential, relying largely on the active release of beneficial metabolites within the gut as well as the expression of key surface proteins involved in immunomodulation, deserves to be explored more deeply. Adaptation to the colon environment is requisite for the active release of propionibacterial beneficial metabolites and constitutes a bottleneck for metabolic activity in vivo. Mechanisms allowing P. freudenreichii to adapt to digestive stresses have been only studied in vitro so far. Our aim was therefore to study P. freudenreichii metabolic adaptation to intra-colonic conditions in situ. Results  We...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00171/28205/26433.pdf

Distribution des biotopes principaux des fonds marins. Sous-région marine Golfe de Gascogne. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Populus, Jacques.
Tipo: Text
Palavras-chave: Golfe de Gascogne; Biotopes; Fonds marins; Habitats physiques; Distribution.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00329/44012/43584.pdf

Observations sur la production du naissain dans le bassin d'Arcachon en 1935
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Borde, F.
Effectuées suivant une méthode maintenant bien établie, nos observations sur la production du naissain ont commencé au mois de mai. La température de l'eau augmente régulièrement depuis le début du mois et atteint la moyenne de 17° au 15 : mais elle fléchit très sensiblement ensuite et ne dépasse guère 15° jusqu'à la fin du mois. Cette température est inférieure à celle de l'année dernière et jusqu'à ce moment, les pêches de plancton n'ont montré la présence d'aucune larve, plate ou portugaise. [OCR NON CONTRÔLE]
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1936
URL: http://archimer.ifremer.fr/doc/1936/publication-5735.pdf

Flottille des Chalutiers non exclusifs. Façade Atlantique. 2019. Synthèse des flottilles de pêche.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d’Informations Halieutiques » (SIH) de l’Ifremer, qui constitue le réseau d’observation des ressources halieutiques et des usages associés. Ce projet s’inscrit dans la mission de service d’intérêt public de l’Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l’analyse du secteur des pêches, le SIH a en charge l’élaboration d’indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche et du grand public.
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00649/76127/77090.pdf

The Renchen L5-6 chondrite breccia - The first confirmed meteorite fall from Baden-Wurttemberg (Germany)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bischoff, Addi; Barrat, Jean-alix; Berndt, Jasper; Borovicka, Jiri; Burkhardt, Christoph; Busemann, Henner; Hakenmueller, Janina; Heinlein, Dieter; Hertzog, Jasmine; Kaiser, Jozef; Maden, Colin; Meier, Matthias M. M.; Morino, Precillia; Pack, Andreas; Patzek, Markus; Reitze, Maximilian P.; Rufenacht, Miriam; Schmitt-kopplin, Philippe; Schonbachler, Maria; Spurny, Pavel; Weber, Iris; Wimmer, Karl; Zikmund, Tomas.
On July 10, 2018 at 21:29 UT extended areas of South-Western Germany were illuminated by a very bright bolide. This fireball was recorded by instruments of the European Fireball Network (EN). The records enabled complex and precise description of this event including the prediction of the impact area. So far six meteorites totaling about 1.23 kg have been found in the predicted location for a given mass during dedicated searches. The first piece of about 12 g was recovered on July 24 close to the village of Renchen (Baden-Wurttemberg) followed by the largest fragment of 955 g on July 31 about five km north-west of Renchen. Renchen is a moderately-shocked (S4) breccia consisting of abundant highly recrystallized rock fragments as well as impact melt rock...
Tipo: Text
Palavras-chave: Ordinary chondrite; Chondrite breccia; L chondrite; Meteorite fall.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00637/74895/75971.pdf

Populations ichtyologiques de grands pélagiques. Sous-région marine Manche - Mer du Nord. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fromentin, Jean-marc; Bonhommeau, Sylvain.
Tipo: Text
Palavras-chave: Manche; Mer du Nord; Grands poissons pélagiques; Biocénose; Exploitation; Etat des stocks.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00327/43844/43418.pdf

Stable isotope analysis position of intertidal of food source and trophic nematodes and copepods
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rzeznik Orignac, J; Boucher, G; Fichet, Denis; Richard, P.
Four dominant nematode species and various copepods from an intertidal mudflat in Marennes-Oleron Bay were analyzed for delta C-13 and delta N-15 ratios together with their potential food source, the microphytobenthos. It was shown that microphytobenthic C is passed to nematodes either by grazing or predation on herbivorous meiofauna by other nematodes. Diatoms of different sizes exhibited different C-13 content, which can be reflected in herbivorous meiofauna, such as the nematodes Daptonema oxycerca and Metachromadora remanei and the bulk of copepods, indicating they can select different sizes of diatoms. Results confirm the need to analyze meiofauna feeding habits at the species or genera level since the delta N-15 and delta C-13 signatures differed...
Tipo: Text
Palavras-chave: Stable isotopes; Marennes Oleron; Mudflat; Food web; Benthic diatoms; Microphytobenthos; Meiofauna; Copepods; Nematodes.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4292.pdf

An Alternative View of the Microseismicity along the Western Main Marmara Fault
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Batsi, Evangelia; Lomax, Anthony; Tary, Jean-baptiste; Klingelhoefer, Frauke; Riboulot, Vincent; Murphy, Shane; Monna, Stephen; Ozel, Nurcan Meral; Kalafat, Dogan; Saritas, Hakan; Cifci, Gunay; Cagatay, Namik; Gasperini, Luca; Geli, Louis.
A detailed study, based on ocean‐bottom seismometers (OBSs) recordings from two recording periods (3.5 months in 2011 and 2 months in 2014) and on a high‐resolution, 3D velocity model, is presented here, which provides an alternative view of the microseismicity along the submerged section of the North Anatolian fault (NAF) within the western Sea of Marmara (SoM). The nonlinear probabilistic software packages of NonLinLoc and NLDiffLoc were used for locating earthquakes. Only earthquakes that comply with the following location criteria (e.g., representing 20% of the total amount of events) were considered for analysis: (1) number of stations≥5; (2) number of phases≥6, including both P and S; (3) root mean square (rms) location error≤0.5  s; and...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00453/56416/58103.pdf

Report of the Workshop on Age Reading of Dab (WKARDAB)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
The Planning Group on Commercial Catch, Discards and Biological Sampling (PGCCDBS) meeting, in 2008, identified dab (Limanda limanda) as a species requiring an exchange and ageing workshop to evaluate and improve the age interpretation based on whole otoliths. The Workshop can build on the results of the otolith ex-change organized in 2009 and will be the first ageing workshop for dab. One otolith set were included in the workshop: whole otoliths from 160 fish of the North Sea recovered during all seasons (January, April, July and November) of 2008 (40 fish per Quarter). Only digital images (Reflected and Transmitted light) are used. 6 countries (Germany, Belgium, Denmark, Netherlands, Irish Republic, France and UK England), including 12 readers, were...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00049/16017/13478.pdf

In Vivo RNA Interference of a Gonad-Specific Transforming Growth Factor-beta in the Pacific Oyster Crassostrea gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Huvet, Arnaud; Fleury, Elodie; Corporeau, Charlotte; Quillien, Virgile; Daniel, Jean-yves; Riviere, Guillaume; Boudry, Pierre; Fabioux, Caroline.
We investigated the role of oyster gonadal TGF beta (og-TGF beta) in the reproduction of Crassostrea gigas, using an in vivo RNA interference approach. We designed double-stranded RNA targeting og-TGF beta, which is specifically expressed in the somatic cells surrounding germ cells in the gonad of both male and female oysters. In vivo injection of this og-TGF beta dsRNA into the gonad led to knock-down phenotypes for both sexes, with significant reduction (77.52% relative to controls) of the gonad area, lowered reproductive effort and germ cell under-proliferation. Interestingly, half of the injected females halted their vitellogenesis, since we were only able to observe pre-vitellogenic oocytes. In addition, apoptotic germ cells and haemocytes infiltrated...
Tipo: Text
Palavras-chave: Marine bivalve; Crassostrea gigas; Reproduction; RNA interference; Transforming growth factor-beta.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00087/19794/17486.pdf

EUREC4A
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Stevens, Bjorn; Bony, Sandrine; Farrell, David; Ament, Felix; Blyth, Alan M.; Fairall, Christopher W.; Karstensen, Johannes; Quinn, Patricia K.; Speich, Sabrina; Acquistapace, Claudia; Aemisegger, Franziska; Albright, Anna Lea; Bellenger, Hugo; Bodenschatz, Eberhard; Caesar, Kathy-ann; Chewitt-lucas, Rebecca; De Boer, Gijs; Delanoë, Julien; Denby, Leif Christopher; Ewald, Florian; Fildier, Benjamin; Forde, Marvin; George, Geet; Gross, Silke; Hagen, Martin; Hausold, Andrea; Heywood, Karen J.; Hirsch, Lutz; Jacob, Marek; Jansen, Friedhelm; Kinne, Stefan; Klocke, Daniel; Kölling, Tobias; Konow, Heike; Lothon, Marie; Mohr, Wiebke; Naumann, Ann Kristin; Nuijens, Louise; Olivier, Léa; Pincus, Robert; Pöhlker, Mira L.; Reverdin, Gilles; Roberts, Gregory; Schnitt, Sabrina; Schulz, Hauke; Siebesma, Pier; Stephan, Caroline; Sullivan, Peter P; Touzé-peiffer, Ludovic; Vial, Jessica; Vogel, Raphaela; Zuidema, Paquita; Alexander, Nicola; Alves, Lyndon; Arixi, Sophian; Asmath, Hamish; Bagheri, Gholamhossein; Baier, Katharina; Bailey, Adriana; Baranowski, Dariusz B.; Baron, Aurelie; Barrau, Sébastien; Barrett, Paul Alan; Batier, Frédéric; Behrendt, Andreas; Bendinger, Arne; Beucher, Florent; Bigorre, Sebastien; Blades, Edmund; Blossey, P; Bock, Olivier; Boeing, Steven J; Bosser, Pierre; Bourras, Denis; Bouruet-aubertot, Pascale; Bower, Keith; Branellec, Pierre; Branger, Hubert; Brennek, Michal; Brewer, Alan; Brilouet, Pierre Etienne; Brügmann, Björn; Buehler, Stefan Alexander; Burke, Elmo; Burton, Ralph; Calmer, Radiance; Canonici, Jean-christophe; Carton, Xavier; Cato, Gregory; Charles, Jude Andre; Chazette, Patrick; Chen, Yanxu; Chilinski, Michal T; Choularton, Tom; Chuang, Patrick Y.; Clarke, Shamal; Coe, Hugh; Cornet, Cas; Coutris, Pierre; Couvreux, Fleur; Crewell, Susanne; Cronin, Timothy Wallace; Cui, Zhiqiang; Cuypers, Yannis; Daley, Alton; Damerell, Gillian Mary; Dauhut, Thibaut; Deneke, Hartwig M; Desbios, Jean-philippe; Dörner, Steffen; Donner, Sebastian; Douet, Vincent; Drushka, Kyla; Dütsch, Marina; Ehrlich, André; Emanual, Kerry; Emmanouilidis, Alexandros; Etienne, Jean-claude; Etienne-leblanc, Sheryl; Faure, Ghislain; Feingold, Graham; Ferrero, Luca; Fix, Andreas; Flamant, Cyrille; Flatau, Piotr J.; Foltz, Gregory R.; Forster, Linda; Furtuna, Iulian; Gadian, Alan; Galewsky, Joseph; Gallagher, Martin; Gallimore, Peter; Gaston, Cassandra J.; Gentemann, Chelle; Geyskens, Nicolas; Giez, Andreas; Gollop, John; Gouirand, Isabelle; Gourbeyre, Christophe; De Graaf, Dörte; De Groot, Geiske E.; Grosz, Robert; Güttler, Johannes; Gutleben, Manuel; Hall, Kashawn; Harris, George; Helfer, Kevin Christopher; Henze, Dean; Herbert, Calvert; Holanda, Bruna; Ibanez-landeta, Antonio; Intrieri, Janet M.; Iyer, Suneil; Julien, Fabrice; Kalesse, Heike; Kazil, Jan; Kellman, Alexander; Kidane, Abiel T.; Kirchner, Ulrike; Klingebiel, Marcus; Körner, Mareike; Kremper, Leslie Ann; Kretzschmar, Jan; Krüger, Ovid; Kumala, Wojciech; Kurz, Armin; L'Hégaret, Pierre; Labaste, Matthieu; Lachlan-cope, Tom A.; Laing, Arlene; Landschützer, Peter; Lang, Theresa; Lange Vega, Diego; Lange, Ingo; Laplace, Clément; Lavik, Gaute; Laxenaire, Rémi; Le Bihan, Caroline; Leandro, Mason; Lefèvre, Nathalie; Lena, Marius; Leschow, Donald; Li, Qiang; Lloyd, Gary; Los, Sebastian; Losi, Niccolò; Lovell, Oscar; Luneau, Christopher; Makuch, Przemyslaw; Malinowski, Szymon P; Manta, Gaston; Marinou, Eleni; Marsden, Nicholas; Masson, Sebastien; Maury, Nicolas; Mayer, Bernhard; Mayers-als, Margarette; Mazel, Christophe; Mcgeary, Wayne; Mcwilliams, James C.; Mech, Mario; Mehlmann, Melina; Meroni, Agostino Niyonkuru; Mieslinger, Theresa; Minikin, Andreas; Minnett, Peter; Möller, Gregor; Morfa Avalos, Yanmichel; Muller, Caroline; Musat, Ionela; Napoli, Anna; Neuberger, Almuth; Noisel, Christophe; Noone, David C; Nordsiek, Freja; Nowak, Jakub L; Oswald, Lothar; Parker, Douglas J.; Peck, Carolyn; Person, Roland; Philippi, Miriam; Plueddemann, Albert J.; Pöhlker, Christopher; Pörtge, Veronika; Pöschl, Ulrich; Pologne, Lawrence; Posyniak, Michal; Prange, Marc; Quiñones Meléndez, Estefanía; Radtke, Jule; Ramage, Karim; Reimann, Jens; Renault, Lionel; Reus, Klaus; Reyes, Ashford; Ribbe, Joachim; Ringel, Maximilian; Ritschel, Markus; Rocha, Cesar Barbedo; Rochetin, Nicolas; Röttenbacher, Johannes; Rollo, Callum; Royer, Haley; Sadoulet, Pauline; Saffin, Leo; Sandiford, Sanola; Sandu, Irina; Schäfer, Michael; Schemann, Vera; Schirmacher, Imke; Schlenczek, Oliver; Schmidt, Jerome; Schröder, Marcel; Schwarzenboeck, Alfons; Sealy, Andrea; Senff, Christoph J; Serikov, Ilya; Shohan, Samkeyat; Siddle, Elizabeth; Smirnov, Alexander; Späth, Florian; Spooner, Branden; Stolla, M. Katharina; Szkólka, Wojciech; De Szoeke, Simon P.; Tarot, Stephane; Tetoni, Eleni; Thompson, Elizabeth J; Thomson, Jim; Tomassini, Lorenzo; Totems, Julien; Ubele, Alma Anna; Villiger, Leonie; Von Arx, Jan; Wagner, Thomas; Walther, Andi; Webber, Benjamin G. M.; Wendisch, Manfred; Whitehall, Shanice; Wiltshire, Anton; Wing, Allison A.; Wirth, Martin; Wiskandt, Jonathan; Wolf, Kevin; Worbes, Ludwig; Wright, Ethan; Wulfmeyer, Volker; Young, Shanea; Zhang, Cong; Zhang, Dongxiao; Ziemen, Florian; Zinner, Tobias; Zöger, Martin.
The science guiding the \EURECA campaign and its measurements are presented. \EURECA comprised roughly five weeks of measurements in the downstream winter trades of the North Atlantic — eastward and south-eastward of Barbados. Through its ability to characterize processes operating across a wide range of scales, \EURECA marked a turning point in our ability to observationally study factors influencing clouds in the trades, how they will respond to warming, and their link to other components of the earth system, such as upper-ocean processes or, or the life-cycle of particulate matter. This characterization was made possible by thousands (2500) of sondes distributed to measure circulations on meso (200 km) and larger (500 km) scales, roughly four hundred...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00662/77410/79070.pdf

Programme de recherche sur les produits phytosanitaires en zones littorales et estuaires
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tronczynski, Jacek.
This report represents sorne thoughts and the bibliographical review focused on an appraisal of the geochemical fate in freshwater and marin environments of principal pesticides used on French littoral. The sources and routes of entry, concentrations, distribution between non-living compartments and main degradation processes of these xenobiotic substances in the aquatic environment are presented.
Tipo: Text
Palavras-chave: Produits phytosanitaires; Pollution; Environnement aquatique; Littoral.; Pesticides; Pollut~on; Aquatic environment; Littoral.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00132/24302/22300.pdf

Les sites favorables à l'aquaculture sur les côtes bretonnes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fiquet, André.
This inventory of sites favourable for aquaculture on the coasts of Brittany involves the joint goal of the French National Centre for the Exploitation of the Oceans (CNEXO) and the Brittany Region that aims to reserve certain sites to install the structures necessary for aquaculture. The CNEXO continues its efforts, initiated several years ago, to promote aquaculture on French coasts. The Brittany prefecture was the first to request this type of study and wishes to integrate aquaculture as part of coastal spatial planning. The Aquitaine prefecture has since then also requested a similar study that is now in progress. Aquaculture in France is now in a transition period between an experimental phase and the industrial-scale implementation phase. A certain...
Tipo: Text
Ano: 1972
URL: http://archimer.ifremer.fr/doc/1972/rapport-4111.pdf

Utilisation des chaînes alimentaires naturelles et du recyclage des eaux usées dans la production à grande échelle de juvéniles pour l'aquaculture
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Barbabé, G.
The production of Juveniles, key of aquaculture, needs for the alimen­tation of the larvae, to dispose plankton preys, which cannot be supplied by rea­ring. The collections realised with adapted implements, have led to very po­sitive results In both types of media, situated in the surroundings of Séte : mar shes and oxydation ponds (used for waste water purifying). The most abundant plankton in these two kinds of media are uni-cellular algae, Rotlfera, Copepoda, Daphne (oxydation pont) and Aetemia (marshes). These populations constitute a complete alimentation sequence without an equivalent for the necessities of larvae and juveniles. Our qualitative collections (from 0,2 to 20 kg/h) plankton, dependent on the species) have allowed to rear, without any...
Tipo: Text
Palavras-chave: Collecte zooplancton; Aquaculture; Eaux usées; Zooplankton collection; Aquaculture; Waste waters.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/00305/41663/40872.pdf

Combined effects of temperature, irradiance and pH on   Teleaulax amphioxeia   (Cryptophyceae) physiology and feeding ratio for its predator   Mesodinium rubrum   (Ciliophora)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gaillard, Sylvain; Charrier, Aurelie; Malo, Florent; Carpentier, Liliane; Bougaran, Gael; Hégaret, Helene; Réveillon, Damien; Hess, Philipp; Séchet, Veronique.
The cryptophyte Teleaulax amphioxeia is a source of plastids for the ciliate Mesodinium rubrum and both organisms are members of the trophic chain of several species of Dinophysis. It is important to better understand the ecology of organisms at the first trophic levels before assessing the impact of principal factors of global change on Dinophysis spp. Therefore, combined effects of temperature, irradiance and pH on growth rate, photosynthetic activity and pigment content of a temperate strain of T. amphioxeia were studied using a full factorial design (central composite design 23*) in 17 individually controlled bioreactors. The derived model predicted an optimal growth rate of T. amphioxeia at a light intensity of 400 µmol photons · m‐2 · s‐1, more...
Tipo: Text
Palavras-chave: Dinophysis; Ecophysiology; Full factorial design; Global change; Mesodinium rubrum; Teleaulax amphioxeia.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00609/72155/70910.pdf

Dégradation bactérienne du pétrole brut dans des sédiments marins littoraux de la Bretagne nord
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fusey, P.; Oudot, J.
The weathering of petroleum was monitored by high temperature high resolution gas-liquid chromatography in northern Brittany seashore sediments, either contaminated by the Amoco Cadiz oil or experimentally polluted. Most aliphatic and aromatic hydrocarbons were relatively rapidly degraded, but some compounds like isoprenoids (pristane and phytane), triterpanes and alkylated phenanthrenes and dibenzothiophenes appeared to be more recalci­trant. In high energy sites (Roscoff beach), cleaning of the sediments was achieved between 12 and 18 months, whereas the Abers muddy sediments contained after two years bacterially neosynthesised very long chain n-alkanes (&gt;n-C50). Interaction between physical leaching and biodegradation was responsible for sediments...
Tipo: Text
Palavras-chave: Hydrocarbures; Biodégradation; Sédiments marins; Chromatographie en phase gazeuse.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/00306/41753/40964.pdf

National policy objectives and local management results: the economic, social and environmental performances of the shellfish farming institutions in the Mont-Saint-Michel Bay
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mongruel, Remi; Perez, Jose.
This paper examines the discrepancies between national policy objectives for the development of shellfish farming in France and the results of this policy at the local level. National legislation is claimed to favour a ‘people-oriented’ policy and the sustainable use of marine coastal resources. In practice, stakeholders implement this policy under local institutional arrangements. A case study in the Mont-Saint-Michel Bay compares the economic, social and environmental performances of both mussel and oyster industries. Local management arrangements have avoided overexploitation. Conversely, performances in terms of rent distribution, job retention and contribution to public budgets are inconsistent with national objectives. This suggests that the...
Tipo: Text
Palavras-chave: Aquaculture (shellfish-farming); Co-management; Institutional economics; Policy and decision making; Property rights (and institutional arrangements); Social change (in coastal areas).
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00023/13461/15743.pdf

Capteurs infrarouges de polluants aquatiques : synthèse, optimisation et qualification
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Baillieul, Marion.
The development of middle-infrared (MIR) sensors for organic pollutants monitoring in the aquatic environment is currently a challenge of great importance. The mid-infrared sensor based on evanescent wave spectroscopy is a promising analytical tool for simultaneous detection and quantification of a variety of pollutants such as hydrocarbon compounds. Chalcogenide glasses are particularly well adapted for sensing applications due to their wide domain of transparence (up to 10-16 µm depending on their composition). The aims of this study are to synthetize chalcogenide thin films for developing mid-infrared optical integrated platforms and perform their functionalization with polymers in order to increase the sensor sensitivity. Among (GeSe2)100-x(Sb2Se3)x...
Tipo: Text
Palavras-chave: Capteur optique; Moyen infrarouge; Verres de chalcogénures; ATR; BTEX; SEIRA; Optical sensing; Mid-infrared; Chalcogenide glasses; ATR; BTEX; SEIRA.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00499/61020/64422.pdf

Trophic relationships in a deep Mediterranean cold-water coral bank (Santa Maria di Leuca, Ionian Sea)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Carlier, A.; Le Guilloux, E.; Olu, Karine; Sarrazin, Jozee; Mastrototaro, F.; Taviani, M.; Clavier, J.
Cold-water corals (CWC) are frequently reported from deep sites with locally accelerated currents that enhance seabed food particle supply. Moreover, zooplankton likely account for ecologically important prey items, but their contribution to CWC diet remains unquantified. We investigated the benthic food web structure of the recently discovered Santa Maria di Leuca (SML) CWC province (300 to 1100 m depth) located in the oligotrophic northern Ionian Sea. We analyzed stable isotopes (delta C-13 and delta N-15) of the main consumers (including ubiquitous CWC species) exhibiting different feeding strategies, zooplankton, suspended particulate organic matter (POM) and sedimented organic matter (SOM). Zooplankton and POM were collected 3 m above the coral...
Tipo: Text
Palavras-chave: Particulate organic matter; Zooplankton; Stable isotopes; Food web; Mediterranean Sea; Benthic community; Cold water corals.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-7450.pdf

Sixteen years of social and ecological dynamics reveal challenges and opportunities for adaptive management in sustaining the commons
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cinner, J. E.; Lau, J. D.; Bauman, A. G.; Feary, D. A.; Januchowski-hartley, F. A.; Rojas, C. A.; Barnes, M. L.; Bergseth, B. J.; Shum, E.; Lahari, R.; Ben, J.; Graham, N. A. J.
Efforts to confront the challenges of environmental change and uncertainty include attempts to adaptively manage social-ecological systems. However, critical questions remain about whether adaptive management can lead to sustainable outcomes for both ecosystems and society. Here, we make a contribution to these efforts by presenting a 16-y analysis of ecological outcomes and perceived livelihood impacts from adaptive coral reef management in Papua New Guinea. The adaptive management system we studied was a customary rotational fisheries closure system (akin to fallow agriculture), which helped to increase the biomass of reef fish and make fish less wary (more catchable) relative to openly fished areas. However, over time the amount of fish in openly fished...
Tipo: Text
Palavras-chave: Social-ecological system; Adaptive management; Coral reef; Customary management; Fisheries.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00602/71396/69846.pdf

Biogeochemical sensor performance in the SOCCOM profiling float array
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Johnson, Kenneth S.; Plant, Joshua N.; Coletti, Luke J.; Jannasch, Hans W.; Sakamoto, Carole M.; Riser, Stephen C.; Swift, Dana D.; Williams, Nancy L.; Boss, Emmanuel; Haentjens, Nils; Talley, Lynne D.; Sarmiento, Jorge L.
The Southern Ocean Carbon and Climate Observations and Modeling (SOCCOM) program has begun deploying a large array of biogeochemical sensors on profiling floats in the Southern Ocean. As of February 2016, 86 floats have been deployed. Here the focus is on 56 floats with quality-controlled and adjusted data that have been in the water at least 6 months. The floats carry oxygen, nitrate, pH, chlorophyll fluorescence, and optical backscatter sensors. The raw data generated by these sensors can suffer from inaccurate initial calibrations and from sensor drift over time. Procedures to correct the data are defined. The initial accuracy of the adjusted concentrations is assessed by comparing the corrected data to laboratory measurements made on samples collected...
Tipo: Text
Palavras-chave: Profiling floats; Oxygen sensors; PH sensors; Nitrate sensors; Bio-optical sensors; Southern Ocean.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00662/77398/78993.pdf

Petrology of the East Pacific Rise crust and upper mantle exposed in Hess deep (Eastern Equatorial Pacific)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hekinian, Roger; Bideau, Daniel; Francheteau, Jean; Cheminee, Jean-louis; Armijo, Rolando; Lonsdale, Peter; Blum, Norbert.
The Hess Deep, a rifted oval-shaped depression located east of the Galapagos Triple Junction at the tip of the Cocos-Nazca ridge (about 101-degrees-W, 2-degrees-N), was explored in 1988 during 21 submersible dives. A total of 11 dives were devoted to the exploration of the E-W trending Intrarift ridge (15 km in length, 3000-5400 m in depth) north of the Hess Deep depression. The Intrarift ridge represents, an outcrop of recent (1 m.y.) crustal and subcrustal material created at the axis of the East Pacific Rise (EPR), and emplaced during the lithospheric extention responsible for the westward propagation of the Cocos-Nazca rift (Francheteau et al., 1990). The lithospheric block has undergone cataclastic deformation and was dislocated by tectonic activity...
Tipo: Text
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00193/30391/29225.pdf

Approche empirique de la pecherie d'espadon (Xiphias gladius) dans l'ocean Indien et modelisation des deplacements des poissons dans le paysage oceanique tropical
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guyomard, David.
Long-line fishing has been growing on the island of La Réunion since the beginning of the 1990s. The target species is the swordfish (Xiphias gladius), fished mainly in the tropical waters surrounding the island between longitudes 45 degree E and 60 degree E, and latitudes 17 degree S and 27 degree S. From 1998 to 2000, a finalised research programme enabled the collection of precise data concerning the lines' positions and the parameters of the fishing efforts: 3,602 nettings were thus informed by the catches (in numbers of individuals caught) and 12 descriptive variables of the effort. In parallel with this collection effort, satellite maps that described the ocean's landscape of this region of the Indian Ocean exploited by La Réunion's fisheries were...
Tipo: Text
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/these-2592.pdf

Evaluation of the landing obligation joint recommendations (STECF-17-08)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Scientific, Technical and Economic Committee for Fisheries (STECF).
Commission Decision of 25 February 2016 setting up a Scientific, Technical and Economic Committee for Fisheries, C(2016) 1084, OJ C 74, 26.2.2016, p. 4–10. The Commission may consult the group on any matter relating to marine and fisheries biology, fishing gear technology, fisheries economics, fisheries governance, ecosystem effects of fisheries, aquaculture or similar disciplines. This report contains reviews of joint recommendations from Member States regional groups for the implementation of the landing obligation in 2018
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00416/52699/53569.pdf

Cardiac Molecular-Acclimation Mechanisms in Response to Swimming-Induced Exercise in Atlantic Salmon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Castro, Vicente; Grisdale-helland, Barbara; Helland, Stale J.; Torgersen, Jacob; Kristensen, Torstein; Claireaux, Guy; Farrell, Anthony P.; Takle, Harald.
Cardiac muscle is a principal target organ for exercise-induced acclimation mechanisms in fish and mammals, given that sustained aerobic exercise training improves cardiac output. Yet, the molecular mechanisms underlying such cardiac acclimation have been scarcely investigated in teleosts. Consequently, we studied mechanisms related to cardiac growth, contractility, vascularization, energy metabolism and myokine production in Atlantic salmon pre-smolts resulting from 10 weeks exercise-training at three different swimming intensities: 0.32 (control), 0.65 (medium intensity) and 1.31 (high intensity) body lengths s(-1). Cardiac responses were characterized using growth, immunofluorescence and qPCR analysis of a large number of target genes encoding proteins...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00127/23825/21745.pdf

Estimation de l'âge du hareng et du sprat au sud mer du Nord
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mahe, Kelig.
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00020/13107/10105.pdf

La dynamique à sousmésoéchelle sur le plateau continental du Golfe de Gascogne
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Yelerci, Ozge.
This thesis explores the submesoscale dynamics in the Bay of Biscay continental shelf. In the first part, submesoscale features over the shelf are identified using remotely sensed high resolution sea surface temperature (SST) images by MODIS. Front detection is achieved through singularity exponents, a novel method of calculating irregularities on the SST fields, and an index for the frontal activity is generated. Results are complemented with 2.5 km horizontal resolution numerical simulations. Three main types of fronts are presented: i) tidal mixing fronts along the coast and most significantly in the Ushant region; ii) shelf break front related to internal tidal wave activity; iii) fresh water fronts along the edge of the river plumes in winter. In the...
Tipo: Text
Palavras-chave: Dynamique à sousmésoéchelle; Modèle numérique océanique a haute résolution; Golfe de gascogne; Exposants de singularité; Données satellites de température de surface de la mer; Submesoscale dynamics; Fronts; Bay of Biscay.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00497/60910/64259.pdf

Etude de l'extrusion
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Baron, Regis.
Ce rapport fait suite au stage effectué au sein du laboratoire «Génie Alimentaire», de l'Institut Français de Recherche pour l'Exploitation de la MER. Ce stage fait partie du cycle de préparation à la Maîtrise de Sciences et Techniques en Systèmes Automatiques Industriels. Il s'est déroulé du 25 Février au 17 Mai 1991.Ce rapport porte sur l'étude du procédé d'extrusion.
Tipo: Text
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00137/24870/22958.pdf

Risk calculations for conformity assessment in practice
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Allard, Alexandre; Fischer, Nicolas; Smith, Ian; Harris, Peter; Pendrill, Leslie.
In 2012, the Joint Committee for Guides in Metrology (JCGM) published novel guidance on the consideration of measurement uncertainty for decision-making in conformity assessment (JCGM 106:2012). The two situations of making a wrong decision are considered: the risk of accepting a non-conforming item, denoted as the customer risk, and the risk of rejecting a conforming item, denoted as the producer risk. In 2017, the revision of ISO 17025 obliged calibration and testing laboratories to “document the decision rule employed, taking into account the level of risk (such as false accept and false reject and statistical assumptions) associated with the decision rule employed, and apply the decision rule” in the context of the decision made about the conformity of...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00693/80494/83681.pdf

Télédétection des pollutions par hydrocarbures de l'"AMOCO CADIZ"
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Berne, Serge; Brossier, R.; Fontanel, A.; D'Ozouville, Laurent; Serriere, J.; Wadsworth, A.
At first, the chronology of remote sensing flights organized by CNEXO, IFP and IGN is summarized. Secondly, examples of the most commonly observed phenomena along the coastline are presented. An interpretation of the various data collected is given for the area of Roscoff, taken as a model. This interpretation is extended to draw a serie of maps of sea and coastline pollution for several days between March 18 to May 26, 1978. The maps for the 18th and 21st of March are enclosed.
Tipo: Text
Palavras-chave: Télédétection; Marée noire; Cartographie; Remote sensing; Oil spill; Cartography.
Ano: 1978
URL: http://archimer.ifremer.fr/doc/00306/41716/40927.pdf

La dynamique des pêches côtières du pays bigouden
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Charuau, Anatole.
In the beginning, the coastal fleet of the Bigouden region fished by trawling and was completely focused on exploiting lobster and hake. It is a traditional business that expanded between the last war and the 70s, reaching its peak between 1975 and 1980.  The best image to give an idea of this fleet is that of a "bucket waterwheel" endlessly discharging its catch in the four ports of the Guilvinec district. Where there is a seafaring business in Guilvinec, Loctudy and Saint-Guénolé, there is a complementarity that is expressed in two ways: - coastal fishing constitutes a very noticeable and regular supplement to production, since sales happen daily and only bad winter weather causes a relative decrease in the supplement. - coastal fishing gives a...
Tipo: Text
Palavras-chave: France; Brittany; Data; Fishing zone; Fleet; Trawling; Commercial species; Costal fisheries; Finistere; Bretagne; Atlantique Nord Est; Golfe de Gascogne; Merluccius; Lophius; Pisces; Nephrops Norvegicus; Zone peche; Exploitation; Flottille; Chalut; Donnee; Espece commerciale; Peche cotiere.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/rapport-2202.pdf

Sennes coulissantes à Divers poissons. Méditerranée (Hors Corse). 2018. Observation des Marées au débarquement - OBSDEB
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public. Ces indicateurs intègrent...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00596/70810/69044.pdf

Starch supplementation modulates amylase enzymatic properties and amylase B mRNA level in the digestive gland of the Pacific oyster Crassostrea gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Huvet, Arnaud; Jeffroy, Fanny; Daniel, Jean-yves; Quere, Claudie; Le Souchu, Pierrick; Van Wormhoudt, A.; Boudry, Pierre; Moal, Jeanne; Samain, Jean-francois.
In the oyster Crassostrea gigas consumption-related traits, amylase properties and growth were found to be linked through genotypes that differed for polymorphism in the two amylase genes AMYA and AMYB. Modulation of AMYA mRNA level had already been observed in response to food availability, whereas the functional role of AMYB was still unknown. To improve knowledge about the regulation of amylase expression in C. gigas and the respective roles of the two genes, we made an assay of amylase expression at mRNA and enzymatic levels in the digestive gland of oysters that had received dietary supplements of starch. After 18 days, a significant increase of translatable mRNA for AMYB was observed, with a correlated increase in Michaelis-Menten constant Km values...
Tipo: Text
Palavras-chave: Alpha-amylase; Crassostrea gigas; Digestive enzyme; Michaelis-Menten constant; Regulation.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00087/19869/17521.pdf

Mercury content in commercial pelagic fish and its risk assessment in the Western Indian Ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kojadinovic, Jessica; Potier, M; Le Corre, M; Cosson, R; Bustamante, Paco.
As top predators of pelagic food webs, large fish naturally bioaccumulate mercury (Hg). Determining Hg burdens in commercialized fish is essential considering the concern about effects of contaminants on human health and the legal thresholds that are therefore set for local consumption and/or exportation. Total Hg levels were measured in the muscular tissue of 183 fish of five commercially important species from the tropical zone of the Western Indian Ocean. All individuals were measured and sexed in order to study the impregnation of Hg with size and sex within each species. Values of Hg found in this part of the Indian Ocean were comparable to Hg in muscular tissue of the same species studied in other areas. The highest Hg levels were noted in Swordfish...
Tipo: Text
Palavras-chave: Health standards; Mozambique channel; Reunion Island; Pelagic fish; Impregnation levels; Mercury.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1862.pdf

Compétition internationale et politiques nationales dans les transports maritimes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Shuo, M.
The evolution of technology and labor costs in maritime countries results, throughout the international competition, in a transfer of shipping from developed countries to some newly industrialized countries, although the protectionism and the international cooperation can modify, liule or more, this tranfer. [0 make the maximum profit from shipping industry for the national economy, a new maritime policy is supposed to be worked out in line with such an evolution, so as to decide when and how the government should be involved. That policy ought to have three stages concerning successively the preparation, the development and the retreat of shipping industry. A merchant fleet is often considered to be a constitutive element of national sovereignty....
Tipo: Text
Palavras-chave: SEM.
Ano: 1988
URL: http://archimer.ifremer.fr/doc/1988/rapport-4304.pdf

Intensified summer monsoon and the urbanization of Indus Civilization in northwest India
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dixit, Yama; Hodell, David A.; Giesche, Alena; Tandon, Sampat K.; Gazquez, Fernando; Saini, Hari S.; Skinner, Luke C.; Mujtaba, Syed A. I.; Pawar, Vikas; Singh, Ravindra N.; Petrie, Cameron A.
Today the desert margins of northwest India are dry and unable to support large populations, but were densely occupied by the populations of the Indus Civilization during the middle to late Holocene. The hydroclimatic conditions under which Indus urbanization took place, which was marked by a period of expanded settlement into the Thar Desert margins, remains poorly understood. We measured the isotopic values (delta O-18 and delta D) of gypsum hydration water in paleolake Karsandi sediments in northern Rajasthan to infer past changes in lake hydrology, which is sensitive to changing amounts of precipitation and evaporation. Our record reveals that relatively wet conditions prevailed at the northern edge of Rajasthan from similar to 5.1 +/- 0.2 ka BP,...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00434/54589/55970.pdf

Dawson tephra, a widespread 29‐ka marker bed, in a marine core from Patton Seamount off the Alaska Peninsula and its potential marine–terrestrial correlation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Aoki, Kaori.
A tephra layer with normal grading in the sub‐bottom depth interval 119–122 cm in marine core SO202‐27‐6 was collected on Patton Seamount in the northeast North Pacific Ocean. Based on the geochemistry of volcanic glass shards determined by a wavelength dispersive electron probe micro‐analyser and an X‐ray fluorescence analyser, this layer is correlated to the Dawson tephra, a widespread late Pleistocene time marker tephra in Alaska and the Yukon. The age of the Dawson tephra in the core is 29.03 ± 0.178 ka (1 sigma) based on a published age model. The Dawson tephra is revealed to have been deposited in the transition from marine isotope stage 3 to 2, i.e. the last stage of Heinrich Stadial 3 derived from the ice‐rafted debris signal. According to the...
Tipo: Text
Palavras-chave: Dawson tephra; Heinrich Stadial; Late Pleistocene; Marine sediment; MIS3; 2.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00598/71056/69371.pdf

Automate programme de distribution de granules secs, effet de la fragmentation de rations journalières sur le bar (dicentrarchus labrax)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Alliot, A.; Febvre, A.; Marquet, R.; Metailler, R.; Pastoureaud, A.
The experimental study of marine animal nutrition raises a number of technical issues, especially that of food distribution, when it is supplied in the form of pellets with a low water content. Hand feeding has different disadvantages. Farmers have indeed to supply an increasing number (for experimental purposes) of batches, several times per day and at regular intervals, with various types of food of well-defined quantities. Thus, many hours are dedicated each day to feeding. Moreover, the large number of interventions implied influences the fishes' behaviour.
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1973
URL: http://archimer.ifremer.fr/doc/1973/publication-5997.pdf

Aménagement des marais atlantiques : nécessité d'une gestion de l'espace littoral
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bodoy, Alain; Dardignac, Marie-josée; Manaud, Francois; Masson, Daniel; Mauvais, Jean-louis; Thomas, Gerard.
Tipo: Text
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00040/15126/12463.pdf

Fonctionnement hydrodynamique de la lagune de Biguglia. Partie 1 : Mise en place de la modélisation numérique 3D
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dufresne, Christiane; Malet, Nathalie; Coudray, Sylvain; Fiandrino, Annie.
Le projet Interreg Retralags vise une gestion durable du patrimoine des lagunes, des lacs et des étangs et est développée afin de protéger et de valoriser le patrimoine écosystémique. Cette gestion intégrée s’appuie notamment sur des modèles de gestion des zones humides, qui permettent d’une part d’améliorer notre compréhension de leur fonctionnement et d’autre part, de tester des hypothèses par la simulation de scénarii. Les deux actions IFREMER sont : - La mise en place du modèle hydrodynamique de la lagune de Biguglia, développement d’indicateur hydrologiques opérationnels et test de scenarii hydrologiques et climatiques - La mise en place du modèle écosystémique sur la lagune de Biguglia, développement d’indicateur écologiques opérationnels et test de...
Tipo: Text
Palavras-chave: Modèle hydrodynamique; MARS3D; Lagune; Biguglia.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00433/54453/55824.pdf

A simplified model for the baroclinic and barotropic ocean response to moving tropical cyclones: 2. Model and Simulations
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kudryavtsev, Vladimir; Monzikova, Anna; Combot, Clement; Chapron, Bertrand; Reul, Nicolas.
A simplified analytical model is developed to describe the baroclinic and barotropic ocean response to moving Tropical cyclones (TC) and their associated pycnocline erosions. The model builds on classical mixed layer (ML) models and linear models of ocean response to transient events. As suggested, disturbances of the upper ocean stratification caused by the ML development shall not strongly impact the dynamics of baroclinic modes. Accordingly, the baroclinic response can be estimated using the pre‐storm ocean stratification condition. To the contrary, the ML is strongly coupled with these interior motions, through the TC‐induced upwelling response which affects the entrainment velocity. The ML temperature is then strongly dependent on the local...
Tipo: Text
Palavras-chave: Tropical cyclones; Simplified mode of ocean response; Simulation of satellite observations.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00491/60251/63652.pdf

Impact of open sea deep convection on sediment remobilization in the western Mediterranean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Martin, Jacobo; Miquel, Juan-carlos; Khripounoff, Alexis.
The northwestern Mediterranean is known to be a privileged area of deep water formation via dense shelf water cascading and offshore convection. The impact of the former in the sedimentary dynamics of the deep basin has been highlighted in recent years, while open sea convection has been solely studied from a hydrological perspective. Particle fluxes and hydrodynamics were monitored at the DYFAMED site (Ligurian Sea, western Mediterranean) at 200, 1000 m and near the seafloor (2350 m depth) during winter 2005-2006. From February to April 2006, and in coincidence with an unusual episode of deep water formation, a notable intensification of currents was observed in the entire water column and near-bottom particle flux increased up to two orders of magnitude....
Tipo: Text
Palavras-chave: Water formation.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00011/12235/9016.pdf

Evidence of package trading in a mature multi-species ITQ market
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Innes, James; Thebaud, Olivier; Norman-lopez, Ana; Little, L. Richard; Kung, John.
In multi-species fisheries managed under ITQs, the existence of joint production may lead to complex catch-quota balancing issues. Previous modelling and experimental research suggest that, in such fisheries, some fishers may benefit from the ability to trade packages of fishing quotas, rather than fulfil their quota needs by simultaneously bidding on separate single-species quota markets. This note presents evidence of naturally occurring package trades in a real fishery. Based on this evidence, we suggest that further empirical and modelling research is required on the potential and limitations of package quota trading in mixed fisheries managed with ITQs.
Tipo: Text
Palavras-chave: ITQs; Mixed fisheries; Package trading; Joint production; Great Barrier Reef.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00173/28470/32144.pdf

Caractéristique structurales et géophysiques de la dorsale Médio-Atlantique de 10° à 50° N
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Douaran, Sylvie.
Cette étude concerne certaines caractéristiques des provinces axiales de la dorsale Médio-Atlantique de 10 à 50° N. Je traite des méthodes de collecte des données structurales et géophysiques en mer.
Tipo: Text
Ano: 1979
URL: http://archimer.ifremer.fr/doc/00034/14546/11809.pdf

SEDICAR MD 133 - Rapport scientifique à bord du Marion Dufresne II
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bourillet, Jean-françois; Turon, Jean-louis.
La campagne SEDICAR (SEDIment CARottage) à bord du navire océanographique Marion Dufresne s’est déroulée dans le golfe de Gascogne. Le navire et ses équipements scientifiques associés étaient mis à disposition par l’IPEV. Au cours des trois parties, le navire a relié Brest à Brest (24-28 juin 03), Brest à Bordeaux (12-14 juillet 03) et Bordeaux à Las Palmas (14 au 24 juillet 03). Pour la première partie, l’équipe scientifique SEDICAR a bénéficié du soutien de l’équipe partielle de la mission précédente PICASSO ; pour la troisième partie, elle est venue renforcer l’équipe de la mission PICABIA. Les travaux de la campagne SEDICAR se sont terminés le 19 juillet 2003 à la sortie du golfe de Gascogne. Les responsables scientifiques étaient Jean-François...
Tipo: Text
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00257/36807/35435.pdf

Résultats de la Surveillance de la Qualité du Milieu Marin Littoral. Département : Finistère. Edition 1999
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: IFREMER, laboratoire côtier de Concarneau.
Dans le cadre du Système national d'Information sur l'Eau, mis en place par le Ministère de l'Ecologie et du Développement Durable, l’Institut national de recherche marine (Ifremer) opère de façon coordonnée à l'échelle du littoral français trois programmes nationaux de surveillance : le réseau de contrôle microbiologique (REMI), le réseau de surveillance du phytoplancton et des phycotoxines (REPHY), le Réseau d'Observation de la Contamination Chimique (RNO). Le suivi des phycotoxines dans les coquillages réalisé par le REPHY est sous maîtrise d'ouvrage du Ministère de l'Agriculture et de la Pêche. Sous l’impulsion de la Directive européenne Cadre sur l'Eau (DCE), le réseau de surveillance benthique (REBENT) est en voie d’extension nationale.
Tipo: Text
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00316/42689/42066.pdf

Overturning in the Subpolar North Atlantic Program: a new international ocean observing system
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lozier, M. Susan; Bacon, Sheldon; Bower, Amy S.; Cunningham, Stuart A.; De Jong, M. Femke; De Steur, Laura; Deyoung, Brad; Fischer, Juergen; Gary, Stefan F.; Greenan, Blair J. W.; Heimbach, Patrick; Holliday, Naomi P.; Houpert, Loic; Inall, Mark E.; Johns, William E.; Johnson, Helen L.; Karstensen, Johannes; Li, Feili; Lin, Xiaopei; Mackay, Neill; Marshall, David P.; Mercier, Herle; Myers, Paul G.; Pickart, Robert S.; Pillar, Helen R.; Straneo, Fiammetta; Thierry, Virginie; Weller, Robert A.; Williams, Richard G.; Wilson, Chris; Yang, Jiayan; Zhao, Jian; Zika, Jan D.
A new ocean observing system has been launched in the North Atlantic in order to understand the linkage between the meridional overturning circulation and deep water formation.  For decades oceanographers have understood the Atlantic Meridional Overturning Circulation (AMOC) to be primarily driven by changes in the production of deep water formation in the subpolar and subarctic North Atlantic. Indeed, current IPCC projections of an AMOC slowdown in the 21st century based on climate models are attributed to the inhibition of deep convection in the North Atlantic. However, observational evidence for this linkage has been elusive: there has been no clear demonstration of AMOC variability in response to changes in deep water formation. The motivation for...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00358/46881/46764.pdf

Report of the Horse Mackerel, Mediterranean Horse Mackerel and Blue Jack Mackerel (Trachurus trachurus, T. mediterreaneus and T. picturatus) Otolith Exchange 2015
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mahe, Kelig; Jurado, A; Garcia Guerreiro, A; Massaro, A; Dueñas, C; Lopez, E; Mullins, E; Lanteri, L; Ferreira, Mj; Elleboode, Romain; Mannini, A; Antolinez, A; Delfs, G; Casciaro, L; O'Cuaig, M; Torres, P; Dijkman, A; Bellamy, Elise; Eriksen, K; Carbonara, P.
The ICES Planning Group on Commercial Catch, Discards and Biological Sampling (PGCCDBS) identified the need of the Horse Mackerel, Mediterranean Horse Mackerel and Blue Jack Mackerel (Trachurus trachurus, T. mediterreaneus and T. picturatus) otolith exchange to take place in 2015. It was the forth exchange. The IFREMER institute and the COISPA Tecnologia &amp; Ricerca, Italy, coordinated this exchange. A total of 550 fish was sampled from the Atlantic Ocean (Eastern Channel, Celtic Sea, Bay of Biscay, Azores,  Portuguese waters and Tenerife) and the Mediterranean Sea (Alboran Sea,  South Adriatic Sea and Ligurian Sea). 19 readers from 8 countries (France, Germany, Spain, Ireland, Italy, Portugal, Netherlands and Norway) participated to this exchange. Among...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00274/38499/36971.pdf

Cahier des charges. Catalogue des dispositifs des lieux et accès aux données marines
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Judeau, Glenn; Huguet, Antoine.
Ce document formalise et organise les besoins autour de la création d’un produit permettant la visualisation des lieux de surveillance en particulier des dispositifs de collecte des programmes de surveillance de la DCSMM mais aussi de l’ensemble des dispositifs répertoriés. Ce produit permettra non seulement la visualisation des lieux de surveillance de plusieurs dispositifs à la fois, mais aussi l’accès aux métadonnées associées. A plus long terme, il permettra de décrire de façon la plus exhaustive possible les données récoltées par les dispositifs et de pouvoir les télécharger.
Tipo: Text
Palavras-chave: Directive Cadre Stratégie Milieu Marin 2008/56/CE; Lieux de surveillance; Dispositifs de collecte; Programme de surveillance; Exigences fonctionnelles; Cahier des charges; Marine Strategy Framework Directive (2008/56/CE); Monitoring locations; Monitoring programmes; Functional needs; Specifications.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00664/77559/79535.pdf

Gametogenetic cycle and reproductive effort assessed by two methods in 3 age classes of Pacific oysters, Crassostrea gigas, reared in Normandy
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Royer, J; Seguineau, Catherine; Park, K; Pouvreau, Stephane; Choi, K; Costil, K.
Two methods were used to estimate the reproductive output of female Pacific oysters reared in Normandy: histology with image analysis and ELISA (Enzyme-Linked lmmunoSorbent Assay) which allowed the quantification of egg protein. Condition indices, gonad area and gametogenetic stages of the oysters were determined in the entire population (males and females) between May and October 2005. All investigations were performed in 3 age classes: oysters in their first, second or third years (corresponding to spat, half-grown and market-sized oysters, respectively). Both quantitative histology and ELISA provided similar results in terms of reproductive effort (illustrated by the gonado-somatic index, GSI) except during the GSI drop, corresponding to spawning, which...
Tipo: Text
Palavras-chave: Reproductive effort; Image analysis; Gametogenetic cycle; ELISA; Crassostrea gigas; Condition index.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4305.pdf

Global marine primary production constrains fisheries catches
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chassot, Emmanuel; Bonhommeau, Sylvain; Dulvy, Nicholas K.; Melin, Frederic; Watson, Reg; Gascuel, Didier; Le Pape, Olivier.
Primary production must constrain the amount of fish and invertebrates available to expanding fisheries; however the degree of limitation has only been demonstrated at regional scales to date. Here we show that phytoplanktonic primary production, estimated from an ocean-colour satellite (SeaWiFS), is related to global fisheries catches at the scale of Large Marine Ecosystems, while accounting for temperature and ecological factors such as ecosystem size and type, species richness, animal body size, and the degree and nature of fisheries exploitation. Indeed we show that global fisheries catches since 1950 have been increasingly constrained by the amount of primary production. The primary production appropriated by current global fisheries is 17-112% higher...
Tipo: Text
Palavras-chave: Bottom-up; Large Marine Ecosystem; Quantile regression; Sustainable fishing.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00002/11294/7836.pdf

Validity of Escherichia coli, enterovirus, and F-specific RNA bacteriophages as indicators of viral shellfish contamination
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Miossec, Laurence; Le Guyader, Soizick; Pelletier, Dominique; Haugarreau, Larissa; Caprais, Marie-paule; Pommepuy, Monique.
The sanitary classification of harvesting areas for bivalve mollusks in France is based on the level of Escherichia Coli contamination detected in shellfish meat, as defined in EC Directive 91/492 EEC. However, outbreaks of gastroenteritis or hepatitis after consumption of shellfish meeting current bacteriological standards suggest that E. coli is a poor indicator of viral contamination. The purpose of this study was to assess the adequacy of enterovirus and F-specific RNA bacteriophages as new indicators of human enteric viruses. Shellfish were sampled over a 37-mo period to characterize microbial contamination in two coastal areas subjected to different sewage contamination inputs. Contamination by E. coli, F-specific RNA bacteriophages (F+ RNA) and...
Tipo: Text
Palavras-chave: Indicator; Escherichia coli; F specific RNA bacteriophages; Enteric viruses; Viral contamination; Shellfish.
Ano: 2001
URL: https://archimer.ifremer.fr/doc/00000/10006/7794.pdf

JERICO-NEXT. Review of monitoring of environmental threats and pressures in Europe
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Painting, Suzanne; Collingridge, Kate; Durand, Dominique; Grémare, Antoine; Bernard, Guillaume; Puillat Felix, Ingrid.
The objectives of JERICO-NEXT are to address the challenge of observing the complexity and high variability of coastal areas at Pan-European level, within the context of the EU Water Framework Directive and Marine Strategy Framework Directive, and operational marine services. The JERICO-NEXT project aims to extend the EU network of coastal observations developed in FP7-JERICO by adding new innovative infrastructures while integrating biogeochemical and biological observations. An important target of JERICO-NEXT is to provide the research community with continuous and more valuable coastal data coupling physical and biological information. The ultimate objectives are to maximise the value and impact of the JERICO research infrastructure (JERICO-RI) and...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00382/49335/49720.pdf

Approches culturales et moléculaires des assemblages microbiens associés aux polychètes hydrothermaux de la famille Alvinellidae
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Alain, Karine.
Cultural and molecular approaches were used to analyse the microbial assemblages associated to the deep-sea hydrothermal vent polychaete worms of the family Alvinellidae. In a first part of the work, the populations associated to three alvinellid species from the Juan de Fuca Ridge (Paralvinella palmiformis, Paralvinella pandorae and Paralvinella sulfincola) were identified by phylogenetic analyses. A wide microbial diversity was detected, like a great number of new sequences or of sequences belonging to species previously unidentified at deep-sea hydrothermal vents. All the libraries were found to be dominated by sequences affiliated to the epsilon-Proteobacteria.  In other respects, fermentative micro-organisms belonging to the Thermococcales, the...
Tipo: Text
Palavras-chave: Paralvinella; Alvinella; 16S rRNA; Thermophile; Hydrothermal vent; Paralvinella; Alvinella; ARNr 16S; Thermophile; Source hydrothermale.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2005/these-332.pdf

Damping of climate-scale oceanic variability by mesoscale eddy turbulence
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sévellec, Florian; Naveira Garabato, A. C.; Huck, Thierry.
The impact of mesoscale eddy turbulence on long-term, climatic variability in the ocean's buoyancy structure is investigated using observations from a mooring deployed in the Drake Passage, Southern Ocean. By applying the Temporal-Residual-Mean framework and characterizing the variance contributors and the buoyancy variance budget, we identify the main source and sink of long-term buoyancy variance. Long-term buoyancy variance amplitude is set by long-term vertical velocity fluctuations acting on the steady stratification. This baro-clinic buoyancy flux is also the main source of the variance, indicative of the effect of large-scale baroclinic instability. This source is balanced by a sink of long-term buoyancy variance associated with the vertical...
Tipo: Text
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00658/77057/78356.pdf

Dérangement de la faune. Sous-région marine Manche - Mer du Nord. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Paillet, Jerome.
Tipo: Text
Palavras-chave: Manche; Mer du Nord; Dérangement; Faune marine; Oiseaux marins; Mammifères marins; Espèces aquatiques marines.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00327/43858/79165.pdf

Developmental origin of a major difference in sensory patterning between zebrafish and bluefin tuna
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ghysen, Alain; Dambly-chaudiere, Christine; Coves, Denis; De La Gandara, Fernando; Ortega, Aurelio.
The posterior lateral line system (PLL) of teleost fish comprises a number of mechanosensory organs arranged in defined patterns on the body surface. Embryonic patterns are largely conserved among teleosts, yet adult patterns are highly diverse. Although changes in pattern modify the perceptual abilities of the system, their developmental origin remains unknown. Here we compare the processes that underlie the formation of the juvenile PLL pattern in Thunnus thynnus, the bluefin tuna, to the processes that were elucidated in Danio rerio, the zebrafish. In both cases, the embryonic PLL comprises five neuromasts regularly spaced along the horizontal myoseptum, but the juvenile PLL comprises four roughly parallel anteroposterior lines in zebrafish, whereas it...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00077/18777/16357.pdf

Integrating spatial indicators in the surveillance of exploited marine ecosystems
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rufino, Marta; Bez, Nicolas; Brind'Amour, Anik.
Spatial indicators are used to quantify the state of species and ecosystem status, that is the impacts of climate and anthropogenic changes, as well as to comprehend species ecology. These metrics are thus, determinant to the stakeholder’s decisions on the conservation measures to be implemented. A detailed review of the literature (55 papers) showed that 18 spatial indicators were commonly used in marine ecology. Those indicators were than characterized and studied in detail, based on its application to empirical data (a time series of 35 marine species spatial distributions, sampled either with a random stratified survey or a regular transects surveys). The results suggest that the indicators can be grouped into three classes, that summarize the way the...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00469/58087/60490.pdf

Observation en bassin du chalut pélagique a recouvrement de ventre
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Meillat, Marc.
Following a mission made by J.P. George on board trawls testing tunny fishing by using a pelagic "boeuf" trawl in September 1987 (because these tests were very promising), IFREMER became interested in designing a trawl more adapted to this type of fishing, known as surface fishing, it was therefore decided to create a mock-up to scale of the trawl that folds down from the bottom.
Tipo: Text
Palavras-chave: Fishing technology; Pelagic trawl; Flume tank; Technologie des peches; Chalut pelagique; Bassin d'essai.
Ano: 1988
URL: http://archimer.ifremer.fr/doc/1988/rapport-2747.pdf

Contamination accidentelle par le cadmium d'un mollusque Ruditapes decussatus - bioaccumulation et toxicité (Cl 50,96 H)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Henry, M; Huang, W; Cornet, C; Belluau, M; Durbec, Jp.
Tipo: Text
Ano: 1984
URL: http://archimer.ifremer.fr/doc/00131/24215/22208.pdf

Actions of sex steroids on kisspeptin expression and other reproduction-related genes in the brain of the teleost fish European sea bass
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Alvarado, M. V.; Servili, Arianna; Moles, G.; Gueguen, M.m.; Carrillo, M.; Kah, O.; Felip, A.
Kisspeptins are well known as mediators of the coordinated communication between the brain-pituitary axis and the gonads in many vertebrates. To test the hypothesis that gonadal steroids regulate kiss1 and kiss2 mRNA expression in European sea bass (a teleost fish), we examined the brains of gonad-intact (control) and castrated animals, as well as castrated males (GDX) and ovariectomized females (OVX) that received testosterone (T) and estradiol (E2) replacement, respectively, during recrudescence. In GDX males, low expression of kiss1 mRNA is observed by in situ hybridization in the caudal hypothalamus (CH) and the mediobasal hypothalamus (MBH), although hypothalamic changes in kiss1 mRNA levels were not statistically different among the groups, as...
Tipo: Text
Palavras-chave: Kiss1/kiss2; Gnrh-1/gonadotropin; Feedback action; Sex steroid; Hypothalamus; Perciform.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00359/47009/46969.pdf

High Resolution Micro Earthquake Characterization, Deliverable D8_2, EU MARSITE PROJECT (New Directions in Seismic Hazard Assessment through Focused Earth Observation in the Marmara Supersite)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gürbüz, Cemil; Isik, Sezim Ezgi; Geli, Louis; Cros, Estelle.
A study was carried out within Work Package 8 (WP8) of MARSITE in order to improve the characterization of the near-fault micro-seismicity within the Sea of Marmara. Velocity models were thus developed by KOERI and Ifremer respectively, following two different approaches:  - KOERI developed a 3D velocity model for the whole Marmara Region (within latitudes 39.5°N - 42.5°N and longitudes 26.0°E - 30.5°E), including land and seabottom stations, with grid spacing of 9 km x 9 km x 3 km.  - Ifremer developed an opposite, but complementary approach, strictly based on seabottom stations, for the Western Sea of Marmara (40°43’N - 40°54’N - 27°30’E - 28°15’E). A high resolution velocity model with a 750 m x 750 m x 400 m grid spacing was built, using multibeam...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00278/38915/37455.pdf

Surveillance écologique et halieutique du site électronucléaire de Flamanville. Année 2005
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dreves, Luc; Le Gac-abernot, Chantal; Brylinski, Jean-michel; Vincent, Dorothee; Gaffet, Jean-dominique; Lampert, Luis; Martin, Jocelyne; Schlaich, Ivan.
Monitoring n°23 of the Flamanville nuclear power plant takes into account studies conducted between March and September 2005. Impacts on hydrology, microbiology, phytoplankton, zooplankton, fisheries, intertidal phytobenthos and zoobenthos are reported. This power plant has been in operation for twenteen years.
Tipo: Text
Palavras-chave: Centrale nucléaire; Flamanville; Surveillance; Benthos; Halieutique; Pelagos; Flamanville; Monitoring; Nuclear power plant; Benthos; Fisheries; Pelagos.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00005/11657/8316.pdf

Résultats de la campagne de flexo-électro-carottage en Méditerranée Nord-occidentale (3 avril - 27 mai 1970)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pautot, Guy.
Tipo: Text
Ano: 1972
URL: https://archimer.ifremer.fr/doc/00310/42135/41448.pdf

Le gastéropode prédateur Rapana venosa : point sur les connaissances et expérimentations au laboratoire
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Joly, Jean-pierre; Bouget, Jean-francois; Hirata, Toshio.
L’implantation récente de Rapana venosa, gastéropode prédateur originaire d’Extrême Orient, en plusieurs points du globe (USA, France, Uruguay, Argentine) et son impact sur les populations de bivalves autochtones justifient un certains nombre de recherches engagées par les pays concernés. Le présent rapport compile les dernières informations scientifiques disponibles sur la biologie de R. venosa. Par ailleurs, l’opportunité d’obtenir des pontes en milieu naturel et en captivité en 2001 a permis de faire des observations sur la maturation des larves. Il apparaît que dans les conditions de températures régnant en Baie de Quiberon en été (18 à 22°C), les larves de Rapana venosa sont capables d’éclore. L’impossibilité, dans cette expérimentation, d’amener ces...
Tipo: Text
Palavras-chave: Rapana venosa; Biologie; Larve; Eclosion; Rapana venosa; Biology; Larva; Hatching.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00016/12699/9620.pdf

Seasonal and inter-annual variability of bacterioplankton biomass at station Kerfix, off Kerguelen Islands, Antarctica
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Delille, D.
Between January 1992 and March 1995, the research project Kerfix undertook the first regular non-coastal multiyear acquisition of parameters related to the carbon cycle in the Southern Ocean at a time series station located at 50degrees40'S-68degrees25'E, 110 km southwest of the Kerguelen Islands. I present here a general overview of the bacteriological data collected during this survey. Bacterioplankton biomass at Kerfix station was always significantly lower than in the direct vicinity of the Kerguelen Islands. Bacterial abundance decreased from surface to deepest layers (from 10(6) cells ml(-1) in surface layer to 5.0 x 10(4) cells ml(-1) at 1500 m). In contrast, mean cell volume (0.1 mum(3)) and proportion of free-living bacteria (80%) were relatively...
Tipo: Text
Palavras-chave: Océan Antarctique; Biomasse bactérienne; Distribution verticale; Variations saisonnières; Variabilité interannuelle; Antarctic ocean; Bacterial biomass; Vertical distribution; Seasonal changes; Interannual variability.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00321/43268/42999.pdf

Structure and variability of shelf sea fronts as observed by an undulating ctd system
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Allen, Claire; Simpson, Jh; Carson, Rm.
Tipo: Text
Ano: 1980
URL: http://archimer.ifremer.fr/doc/00122/23295/21122.pdf

Pratiques culturales et mortalités d'huîtres creuses Crassostrea gigas en baie de Quiberon, en 2001-2002. Bilan des enquêtes, plongées et prélèvements sur 18 semis en 2001-2002
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mazurie, Joseph; Langlade, Aime; Fleury, Pierre-gildas; Bouget, Jean-francois; Claude, Serge; Foucart, Marie; Bedier, Edouard.
This study is the second part of a former report rapport Ifremer DRV/RST/RA/LCB/2002-08 dealing with rearing methods, growth and mortality performances, and problems encountered by the oyster farmers from Quiberon Bay (2800 ha of leases) : the first report relied on a survey achieved in july 200l, about 18 oyster farmers, and 2 diving campaigns (july and october 2001) on 2 years old oyster batches from the same farmers. Il is now completed by a last campaign of diving in october 2002, on 7 parcels out of the 18, still bearing the initial oysters. The analysed enterprises vary in particular by the location and depth of their concession inside the bay, but also by their rearing scheme : a majority favours seedings with 18 month old oysters or more, according...
Tipo: Text
Palavras-chave: Huître creuse; Crassastrea gigas; Baie de Quiberon; Croissance; Mortalité; Pratiques culturales; Rentabilité économique; Cupped oyster; Crassostrea gigas; Mortality; Rearing practices; Profitability; Bay of Quiberon; .growlh.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00102/21322/18944.pdf

Faune française de l'Atlantique. Myxines et lamproies (craniata : Myxini et Petromyzontidae)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Quero, Jean-claude; Spitz, Jerôme; Vayne, Jean-jacques.
The fauna of hagfish and lampreys fish from the French Atlantic is given.
Tipo: Text
Palavras-chave: Lampetra marinus; Lampetra fluviatilis; Myxine glutinosa; French Atlantic; Lampreys; Hagfish; Lampetra marinus; Lampetra fluviatilis; Myxine glutinosa; Atlantique français; Lamproies; Myxines.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6603.pdf

Impact of tides and sea-level on deep-sea Arctic methane emissions
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sultan, Nabil; Plaza-faverola, Andreia; Vadakkepuliyambatta, Sunil; Buenz, Stefan; Knies, Jochen.
Sub-sea Arctic methane and gas hydrate reservoirs are expected to be severely impacted by ocean temperature increase and sea-level rise. Our understanding of the gas emission phenomenon in the Arctic is however partial, especially in deep environments where the access is difficult and hydro-acoustic surveys are sporadic. Here, we report on the first continuous pore-pressure and temperature measurements over 4 days in shallow sediments along the west-Svalbard margin. Our data from sites where gas emissions have not been previously identified in hydro-acoustic profiles show that tides significantly affect the intensity and periodicity of gas emissions. These observations imply that the quantification of present-day gas emissions in the Arctic may be...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00654/76564/77690.pdf

Siboga Expeditie 1899-1900. Volume 2. Description of the ship and appliances used for scientific exploration
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tydeman, G. F.
H. M. twin-screw Gun-boat "Siboga", of the Dutch East India Military Marine Service was built in 1897 by the Netherland Ship-building Company at Amsterdam. The vessel is of steel, has twin screws, bilge-keels, steam-capstan, steam-steering-gear, electric light and search-light, two triple-expansion engines, two cylindrical boilers fitted with forced draught and one auxiliary boiler. (...) After the launch in 1898, and while the building was being completed the ship was ordered to join the deep-sea expedition in the East-Indian Archipelago conducted by Prof. Dr. MAX WEBER. It was therefore equipped with appliances and machinery necessary for this purpose. This work was executed at the Government dockyard in Amsterdam under the supervision of Professor WEBER...
Tipo: Text
Ano: 1913
URL: http://archimer.ifremer.fr/doc/1913/publication-4583.pdf

REPAMO. Bulletin de Surveillance. Janvier-Décembre 2020
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Canier, Lydie; Garcia, Celine; Lupo, Coralie.
Le réseau REPAMO (REseau de PAthologie des MOllusques) est le réseau de surveillance de l’état de santé des coquillages du littoral français mis en œuvre par l’Ifremer pour le compte du ministère chargé de l’agriculture. L’objectif du réseau est de  détecter précocement les infections dues à des organismes pathogènes émergents et/ou exotiques affectant les mollusques marins sauvages et d’élevage. La surveillance de la santé des coquillages, sauvages et d’élevage, est mise en œuvre au travers d’une approche d’épidémiosurveillance événementielle s’appuyant sur la déclaration obligatoire des hausses de mortalité de mollusques par les conchyliculteurs/pêcheurs auprès des Directions Départementales des Territoires et de la Mer (DDTM). Dès lors que les...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00667/77876/80023.pdf

Involvement of Mitochondrial Activity and OXPHOS in ATP Synthesis During the Motility Phase of Spermatozoa in the Pacific Oyster, Crassostrea gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boulais, Myrina; Soudant, Philippe; Le Goic, Nelly; Quere, Claudie; Boudry, Pierre; Suquet, Marc.
In the Pacific oyster, spermatozoa are characterized by a remarkably long movement phase (i.e., over 24 h) sustained by a capacity to maintain intracellular ATP level. To gain information on oxidative phosphorylation (OXPHOS) functionality during the motility phase of Pacific oyster spermatozoa, we studied 1) changes in spermatozoal mitochondrial activity, that is, mitochondrial membrane potential (MMP), and intracellular ATP content in relation to motion parameters and 2) the involvement of OXPHOS for spermatozoal movement using carbonyl cyanide m-chlorophenyl hydrazone (CCCP). The percentage of motile spermatozoa decreased over a 24 h movement period. MMP increased steadily during the first 9 h of the movement phase and was subsequently maintained at a...
Tipo: Text
Palavras-chave: Crassostrea gigas; Intracellular ATP content; Mitochondrial membrane potential; Oxidative phosphorylation; Sperm motility.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00303/41376/40666.pdf

Compte-Rendu de campagne. ROeCAILLE Leg 1
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Jacquet, Matthias.
Campagnes en mer (2 legs) à bord du N/O Côtes de la Manche, dans le Golfe de Gascogne (Bretagne), dans le cadre du projet CPER ROEC.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00594/70598/68788.pdf

Le carbone organique biodégradable dans les eaux traitées des stations d’épuration du bassin de la Seine
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tusseau-vuillemin, Marie-helene; Le Réveillé, Guillaume.
Tipo: Text
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00069/17990/15524.pdf

Intervention de quelques facteurs dans l'évolution de la biomasse des claires de Marennes-Oléron
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Zanette, Yvon.
Cette note présente les premiers résultats d'une étude plus complète des claires de Marennes-Oléron. Nous nous sommes efforcés de mettre en relation quelques paramètres physico-chimiques (température, salinité, oxygène dissous, N-NO3, N-NO2, N-HH4, SI-Si O3) et les biomasses phytoplanctoniques et microphytobenthiques exprimées par la chlorophylle a active. Le suivi a été effectué sur un cycle d'utilisation normal de deux claires : l'une (B) semée à la densité traditionnelle de 4 huîtres par m2 (Crassostrea gigas) ; l'autre (A) sans huître servant de témoin.
Tipo: Text
Palavras-chave: Claires ostréicoles; Marais; Charente-Maritime; Marennes Oléron; Biomasse; Paramètres physico-chimiques; Crassostrea gigas.
Ano: 1980
URL: http://archimer.ifremer.fr/doc/00037/14866/12190.pdf

Quartier maritime Saint-Malo. 2019. Activité des navires de pêche.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d’Informations Halieutiques » (SIH) de l’Ifremer, qui constitue le réseau d’observation des ressources halieutiques et des usages associés. Ce projet s’inscrit dans la mission de service d’intérêt public de l’Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l’analyse du secteur des pêches, le SIH a en charge l’élaboration d’indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche et du grand public.
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00650/76218/77181.pdf

Report of the Workshop on Age Reading of North Sea Cod (WKARNSC) 5-7 August 2008 Hirsthals, Denmark
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
The overall result of the workshop exercises is that there are significant variations in North Sea cod age estimates between readers. Both low precision, and relative biases between readers were found and overestimation of fish ages seems to be the problem. The image analysis exercise clarified that the lack of agreement can be referred to the perception of the first age structure (O1) and the very widespread appearance of some age structures resulting in several translucent bands within one year (split rings). Exploring the application of image analysis, the group agreed that applying such tools in the routine age estimation of North Sea cod may prove very valuable. It gives the opportunity to use metrics to rule out doubt when defining the age structures...
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00063/17428/14934.pdf

Volcanics from the Sierra Leone Rise
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hekinian, Roger; Bonte, P.; Dupley, P.l.; Blanc, P.l.; Jehano, C.; Labeyrie, L.; Dupleyssis, J.c.
THE Sierra Leone Rise, located in the east equatorial Atlantic, forms a discontinuous chain of seamounts as shallow as 2 km extending with a general NE-SW trend from near the Sierra Leone Coast of Africa, to the St Paul fracture zone near the Mid-Atlantic Ridge (Fig. 1). The origin of this feature has remained a topic of discussion. Sheridan et al.  have hypothesised that the Sierra Leone Rise is a volcanic structure formed at the beginning of the opening of the Atlantic in the early Cretaceous period. [NOT CONTROLLED OCR]
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/publication-5259.pdf

Fluids and processes at the seismically active fault zone in the Sea of Marmara
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ruffine, Livio; Cagatay, M. Namik; Geli, Louis.
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00463/57473/59866.pdf

Etude préliminaire de l'impact des huîtres Crassostrea gigas (Thunberg) en élevage sur la biomasse des microorganismes des claires de Marennes-Oléron
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Zanette, Yvan; Garnier, Jacqueline.
The evolution of microbial biomass based on chlorophyll a, pheopigments, proteins, particulate carbon and nitrogen, ATP and total viable aerobic bacterias measurements, is studied on three oyster ponds in relation with different densities of reared oysters Crassostrea gigas (Thunberg). Chlorophyll a important amounts characteristics of theses middles (13 to 100µg.1(1) are in part consumed when the density of oysters is important, comparatively ATP increase to 30µg.1(1). With important values of (ATP/carbon) 10(3) ratios, upper than 10, we could think that the development of large silicified phytoplanktonic species should be favoured by oysters particularly the diatom Navicula ostrearia (Bory)
Tipo: Text
Palavras-chave: Navicula ostrearia; Marennes Oleron; Phytoplanctonic biomass; Microbial biomass; Oysters; Crassostrea gigas; Navicula ostrearia; Marennes Oléron; Claire; Biomasse microbienne; Biomasse phytoplanctonique; Huîtres; Crassostrea gigas.
Ano: 1981
URL: http://archimer.ifremer.fr/doc/1981/acte-2936.pdf

Nature et fonctionnement des atolls des Tuamotu (Polynésie Française)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rougerie, F.
The 77 atolls of the Tuamotu Archipelago (French Polynesia) constitute bio-geomorphological singularities in the oligotrophic oceanic field of the South Pacific. These open-ocean atoll reefs are locally overlaid by sandy islets (motu) and encompass lagoons with hydrological properties that are different from oceanic water, according to their degree of enclosure. Lagoonal waters may be more or less saline and eutrophic than oceanic water. In eutrophic lagoons, corals are replaced by macro-algae and cyanobacterial mats. At the archipelago scale, invariance in the geomorphologic patterns of the atoll reefs, despite diffences in age (1 to 50 million years) and in size (2 to 1600 km(2)) underline functional similarities which appear to be independent of surface...
Tipo: Text
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00097/20857/18475.pdf

Assessing aquaculture sustainability: a comparative methodology
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lazard, Jerome; Rey-valette, Helene; Aubin, Joel; Mathe, Syndhia; Chia, Eduardo; Caruso, Domenico; Mikolasek, Olivier; Blancheton, Jean Paul; Legendre, Marc; Rene, Francois; Levang, Patrice; Slembrouck, Jacques; Morissens, Pierre; Clements, Olivier.
Little work dealing with the evaluation of aquaculture system sustainability has so far been undertaken on a global and comparative basis. Moreover, such work is mostly based on very unbalanced approaches in terms of the dimensions of sustainable development that are taken into account. The approach adopted in this article is designed to encompass all the dimensions of sustainability including the institutional one (governance). The taking into account of this latter, in particular, together with the role played by aquaculture in sustainability at the territorial level gives the approach its original and innovative nature. The process of establishing the checklist of sustainability indicators in aquaculture relies on a hierarchical nesting approach which...
Tipo: Text
Palavras-chave: Aquaculture; Indicators; Co-construction; Sustainability.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00245/35598/34151.pdf

MIMOC: A global monthly isopycnal upper-ocean climatology with mixed layers
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Schmidtko, Sunke; Johnson, Gregory C.; Lyman, John M.
A monthly, isopycnal/mixed-layer ocean climatology (MIMOC), global from 0 to 1950dbar, is compared with other monthly ocean climatologies. All available quality-controlled profiles of temperature (T) and salinity (S) versus pressure (P) collected by conductivity-temperature-depth (CTD) instruments from the Argo Program, Ice-Tethered Profilers, and archived in the World Ocean Database are used. MIMOC provides maps of mixed layer properties (conservative temperature, , absolute salinity, SA, and maximum P) as well as maps of interior ocean properties (, SA, and P) to 1950dbar on isopycnal surfaces. A third product merges the two onto a pressure grid spanning the upper 1950dbar, adding more familiar potential temperature () and practical salinity (S) maps....
Tipo: Text
Palavras-chave: Climatology; Global; Temperature; Salinity; Mapping; Objective mapping.
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00383/49447/49930.pdf

Changements climatiques dans la mer de Barents : interactions glace-océan, formation et variabilité de la masse d'eau
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Barton, Benjamin I.
Winter sea ice has declined in the Barents Sea and there is growing evidence that the low sea ice here coincides with cold, winter surface air temperature in Europe and Asia. Atlantic Water (AW) transported into the Barents Sea is warming and its temperature variability is correlated with variability in sea ice extent. As AW extends into the Barents Sea it is modified into a cooler, fresher water mass called BarentsSea Water (BSW). There are limited observations of BSW despite its importance in the Arctic Ocean system, leading to the question, how does the seasonal sea ice impact ocean stratification and mean flow?First, satellite observations are used to find the Polar Front, a water mass boundary between BSW and fresher Arctic Water to the north. The sea...
Tipo: Text
Palavras-chave: Barents Sea Water; Front polaire; Banquise; Satellite; Modélisation; Model; Barents Sea Water; Polar front; Sea ice; Satellite.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00692/80424/83560.pdf

Compréhension des mécanismes d'adhésion des biofilms en milieu marin en vue de la conception de nouveaux moyens de prévention
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rubio, Celine.
Biofilm formation on surfaces immersed in sea water induces equipment damages. Recently, studies focused on the environmental impact of antifouling paints have shown that some active chemical compounds are harmful to the aquatic environment. Hence, it appears fundamental to study physico-chemical interactions existing between marine bacteria and various substrata to conceive new ecological products or antifouling processes.  First, we model an artificial primary organic film, formed by the adsorption of BSA and polysaccharide, as close as the one formed in natural seawater. This organic film is heterogeneous (only 42% of the surface is covered) and organic adsorption occurs in a multi-layer scheme, molecules bounded each others by calcium and magnesium...
Tipo: Text
Palavras-chave: Sea water; Marine bacteria; Physico chemical characterisation; MATS; XPS; IRAS; Adsorption; Bacterial adhesion; Biofim; Eau de mer; Bactéries marines; Caractérisation physicochimique; MATS; XPS; IRRAS; Adsorption; Adhésion bactérienne; Biofilm.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/these-222.pdf

P53 et cancer
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cachot, Jerome.
A la fin des années 70 une protéine était coprécipitée avec l'antigène T du virus simien 40 dans des cellules transformées par ce virus (Lane &amp; Crawford, 1979, Linzer &amp; levine, 1979). Cette protéine a été baptisée p53 en raison de son poids moléculaire de 53 kDa déterminé sur gel SDS-polyacrylamide. Le gène p53 n'a été découvert que quelques années plus tard dans des cellules transformées de souris (Oren &amp; levine, 1983). Il fut tout d'abord assimilé à un oncogène (Jenkins &amp; Sturzbecher, 1984a) avant d'être classé, en 1989, parmi les gènes suppresseur de tumeur (Hinds et al., 1989, Finlay et al., 1989). Il suscite depuis un intérêt croissant de la part de la communauté scientifique internationale. Le nombre de publications scientifiques a...
Tipo: Text
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00132/24351/22350.pdf

Laurentide Ice Sheet meltwater and abrupt climate change during the last glaciation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hill, Hw; Flower, Bp; Quinn, Tm; Hollander, Dj; Guilderson, Tp.
A leading hypothesis to explain abrupt climate change during the last glacial cycle calls on fluctuations in the margin of the North American Laurentide Ice Sheet ( LIS), which may have routed fresh water between the Gulf of Mexico (GOM) and the North Atlantic, affecting North Atlantic Deep Water variability and regional climate. Paired measurements of delta O-18 and Mg/Ca of foraminiferal calcite from GOM sediments reveal five episodes of LIS meltwater input from 28 to 45 thousand years ago (ka) that do not match the millennial-scale Dansgaard-Oeschger warmings recorded in Greenland ice. We suggest that summer melting of the LIS may occur during Antarctic warming and likely contributed to sea level variability during marine isotope stage 3.
Tipo: Text
Palavras-chave: Laurentide Ice Sheet; Meltwater; Marine isotope stage 3; Gulf of Mexico.
Ano: 2006
URL: https://archimer.ifremer.fr/doc/00235/34587/33071.pdf

Karyotypic diversification in Mytilus mussels (Bivalvia: Mytilidae) inferred from chromosomal mapping of rRNA and histone gene clusters
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Perez Garcia, Maria Concepcion; Moran, Paloma; Pasantes, Juan J.
Background: Mussels of the genus Mytilus present morphologically similar karyotypes that are presumably conserved. The absence of chromosome painting probes in bivalves makes difficult verifying this hypothesis. In this context, we comparatively mapped ribosomal RNA and histone gene families on the chromosomes of Mytilus edulis, M. galloprovincialis, M. trossulus and M. californianus by fluorescent in situ hybridization (FISH). Results: Major rRNA, core and linker histone gene clusters mapped to different chromosome pairs in the four taxa. In contrast, minor rRNA gene clusters showed a different behavior. In all Mytilus two of the 5S rDNA clusters mapped to the same chromosome pair and one of them showed overlapping signals with those corresponding to one...
Tipo: Text
Palavras-chave: Mytilus; Chromosome; Fluorescent in situ hybridization; Histone genes; Ribosomal RNA genes; Fibre-FISH.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00204/31500/29906.pdf

Sea surface salinity estimates from spaceborne L-band radiometers: An overview of the first decade of observation (2010–2019)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Reul, Nicolas; Grodsky, S.a.; Arias, M.; Boutin, J.; Catany, R.; Chapron, Bertrand; D'Amico, F; Dinnat, E.; Donlon, C.; Fore, A.; Fournier, Severine; Guimbard, Sebastien; Hasson, A.; Kolodziejczyk, Nicolas; Lagerloef, G.; Lee, T.; Le Vine, D.m.; Lindstrom, E.; Maes, Christophe; Mecklenburg, S.; Meissner, T.; Olmedo, E.; Sabia, R.; Tenerelli, Joseph; Thouvenin-masson, C.; Turiel, A.; Vergely, J.l.; Vinogradova, N.; Wentz, F.; Yueh, S.
Operated since the end of 2009, the European Space Agency (ESA) Soil Moisture and Ocean Salinity (SMOS) satellite mission is the first orbiting radiometer that collects regular and global observations from space of two Essential Climate Variables of the Global Climate Observing System: Sea Surface Salinity (SSS) and Soil Moisture. The National Aeronautics and Space Administration (NASA) Aquarius mission, with the primary objective to provide global SSS measurements from space operated from mid-2011 to mid-2015. NASA's Soil Moisture Active-Passive (SMAP) mission, primarily dedicated to soil moisture measurements, but also monitoring SSS, has been operating since early 2015. The primary sensors onboard these three missions are passive microwave radiometers...
Tipo: Text
Palavras-chave: Sea surface salinity; Ocean microwave remote sensing; Radiometer; L-band; SMOS; Aquarius/SAC-D; SMAP.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00615/72750/71894.pdf

delta O-18 water isotope in the iLOVECLIM model (version 1.0) - Part 2: Evaluation of model results against observed delta O-18 in water samples
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Roche, D. M.; Caley, T.
The (H2O)-O-18 stable isotope was previously introduced in the three coupled components of the earth system model iLOVECLIM: atmosphere, ocean and vegetation. The results of a long (5000 yr) pre-industrial equilibrium simulation are presented and evaluated against measurement of (H2O)-O-18 abundance in present-day water for the atmospheric and oceanic components. For the atmosphere, it is found that the model reproduces the observed spatial distribution and relationships to climate variables with some merit, though limitations following our approach are highlighted. Indeed, we obtain the main gradients with a robust representation of the Rayleigh distillation but caveats appear in Antarctica and around the Mediterranean region due to model limitation. For...
Tipo: Text
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00383/49448/49926.pdf

Relationship between the occurrence of filamentous bacteria on Bathymodiolus azoricus shell and the physiological and toxicological status of the vent mussel
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Martins, I.; Colaco, A.; Santos, Raphael; Lesongeur, Francoise; Godfroy, Anne; Sarradin, Pierre-marie; Cosson, R. P.
The edifice walls of the Eiffel Tower hydrothermal vent site (Mid-Atlantic Ridge, Lucky Strike vent field) are populated with dense communities of dual symbioses harboring vent mussel Bathymodiolus azoricus, some of which are covered by white filamentous mats belonging to sulfur-oxidizing bacteria. Mussels were collected in both the presence and absence of the filamentous bacteria. A sample of the filamentous bacteria was collected and water measurements of temperature, CH4 and H2S were recorded at the collection area. The whole soft tissues were analyzed for total lipid, carbohydrate and total protein. Metallothioneins and metals (Cu, Fe and Zn) levels were determined in the major organs. The results showed no significant physiological and toxicological...
Tipo: Text
Palavras-chave: Vent mussel; Metals; Metallothioneins; Filamentous bacteria; Eiffel Tower; Biomarkers.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6821.pdf

First record of Erythrocles monodi (Emmelichthyidae) in the North-eastern Atlantic
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: De Casamajor, Marie-noelle; Dewez, A; Quero, Jean-claude.
Première capture d'Erythrocles monodi (Poll &amp; Cadenat, 1954) dans l'Atlantique nord-est. Les conditions de captures aux abords du Gouf de Capbreton et les caractéristiques biométriques de ce spécimen sont présentées.
Tipo: Text
Palavras-chave: First record; France; ANE; Erythrocles monodi; Emmelichthyidae.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-603.pdf

Première campagne maladies, anomalies et parasites de poissons d'intérêts commerciaux (M.A.P.P.I.C. 81) 13 octobre au 3 novembre 1981
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Tipo: Text
Ano: 1981
URL: http://archimer.ifremer.fr/doc/00045/15642/13045.pdf

Abyssal hill characterization at the ultraslow spreading Southwest Indian Ridge
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sloan, Heather; Sauter, Daniel; Goff, John A.; Cannat, Mathilde.
The morphology of the flanks of the Southwest Indian Ridge holds a record of seafloor formation and abyssal hill generation at an ultraslow spreading rate. Statistical analysis of compiled bathymetry and gravity data from the flanks of the Southwest Indian Ridge from 54 degrees E to 67 degrees E provides estimates of abyssal hill morphologic character and inferred crustal thickness. The extent of the compiled data encompasses a spreading rate change from slow to ultraslow at similar to 24 Ma, a significant inferred variation in sub-axis mantle temperature, and a patchwork of volcanic and non-volcanic seafloor, making the Southwest Indian Ridge an ideal and unique location to characterize abyssal hills generated by ultraslow spreading and to examine the...
Tipo: Text
Palavras-chave: Southwest Indian Ridge; Abyssal hills; Seafloor morphology.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00266/37682/36757.pdf

Argo data status &amp; data access
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Carval, Thierry.
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/acte-6150.pdf

Fluctuations in the ecosystem of the Western Channel: A summary of studies in progress
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Southward, A J.
There have been long-term fluctuations in plankton, fish, and benthos off Plymouth during the past 60 years. The changes form a biological cycle, involving the whole ecosystem, related to recent variations in climate to the northern hemisphere.
Tipo: Text
Ano: 1983
URL: http://archimer.ifremer.fr/doc/00247/35801/34314.pdf

Diagnostic quantitatif de Perkinsus atlanticus (Apicomplexa, Perkinsea) chez les palourdes Ruditapes decussatus et Ruditapes philippinarum
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Almeida, Manuela.
Le protozoaire parasite Perkinsus atlanticus (Azevedo, 1989) est une des causes des chutes de production de palourdes Ruditapes decussatus et R. philippinarum cultivées au Portugal, en Espagne et en Italie. Des modèles d'infection de Perkinsus ont été réalisés, par reproduction expérimentale de la maladie, pour étudier le rôle de la densité des palourdes, de la température et de la salinité sur le déroulement de la Perkinsiose. L'objectif de ce travail a été de développer une technique de diagnostic quantitative pour optimiser l'évaluation de l'intensité d'infection et détecter de faibles infections des palourdes par P. atlanticus. Le principe de cette technique consiste à cultiver tous les tissus de la palourde en milieu thioglycolate, suivi d'une lyse à...
Tipo: Text
Palavras-chave: Pathologie; Protozoaire; Parasite; Perkinsus atlanticus; Bivalvia; Ruditapes decussatus; Ruditapes philippinarum; Diagnostic.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00033/14416/11710.pdf

Internal ice-sheet variability as source for the multi-century and millennial-scale iceberg events during the Holocene? A model study
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bugelmayer-blaschek, Marianne; Roche, Didier M.; Renssen, Hans; Andrews, John T.
The climate of the Holocene, the current interglacial covering the past 11,700 years, has been relatively stable compared to previous periods. Nevertheless, repeating occurrence of rapid natural climate changes that challenged human society are seen in proxy reconstructions. Ocean sediment cores for example display prominent peaks of enhanced ice rafted debris (IRD) during the Holocene with a multidecadal to millennial scale periodicity. Different mechanisms were proposed that caused these enhanced IRD events, for example variations in the incoming total solar irradiance (TSI), volcanic eruptions and the combination of internal climate variability and external forcings. We investigate the probable mechanisms causing the occurrence of IRD-events over the...
Tipo: Text
Palavras-chave: Greenland ice sheet; Holocene; Bond events; Icebergs; Climate modeling.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00421/53253/54711.pdf

Understanding the mechanisms involved in the high sensitivity of Pecten maximus larvae to aeration
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pauletto, Marianna; Di Camillo, Barbara; Miner, Philippe; Huvet, Arnaud; Quillien, Virgile; Milan, Massimo; Ferraresso, Serena; Pegolo, Sara; Patarnello, Tomaso; Bargelloni, Luca.
Among reared bivalves, some “novel species”, such as the great scallop, Pecten maximus, have experienced more difficulty with routine reproduction due to their high sensitivity to biological, chemical, and physical stress during stages of early development. Working with high larval densities requires the use of aeration systems to provide optimal larval suspension and feed distribution. The high susceptibility of the great scallop to aeration in small-volume systems may impose an important limitation in hatchery-based practices. The present study aimed to investigate the processes impacted by aeration in P. maximus veliger larvae exposed to continuous aeration in small-volume tanks (10 L). Aeration appeared as major stressor that was responsible for early...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00453/56420/58327.pdf

Validation of otolith δ18O values as effective natural tags for shelf-scale geolocation of migrating fish
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Darnaude, Audrey M.; Hunter, Ewan.
The oxygen isotopic ratio of fish otoliths is increasingly used as a 'natural tag' to assess provenance in migratory species, with the assumption that variations in delta O-18 values closely reflect individual ambient experience of temperature and/or salinity. We employed archival tag data and otoliths collected from a shelf-scale study of the spatial dynamics of North Sea plaice Pleuronectes platessa L., to examine the limits of otolith delta O-18-based geolocation of fish during their annual migrations. Detailed intra-annual otolith delta O-18 measurements for 1997-1999 from individuals of 3 distinct sub-stocks with different spawning locations were compared with delta O-18 values predicted at the monthly, seasonal and annual scales, using predicted...
Tipo: Text
Palavras-chave: Fish migration; Oxygen; Stable isotopes; Natural tag; Site fidelity; Plaice; Pleuronectes platessa.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00626/73782/75084.pdf

Lignes de traîne à Grands pélagiques. La Réunion. 2019. Observation des Marées au débarquement - OBSDEB
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public. Ces indicateurs intègrent...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00646/75859/76855.pdf

Dynamique des sédiments fins et mixtes des zones intertidales de la baie de Marennes-Oléron
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kervella, Stephane.
This thesis aims at increasing the general knowledge on sediment dynamics of intertidal flats in the Marennes-Oléron Bay, according to physical, biological and anthropogenic factors.  The conducted research is compound of three complementary studies: (1) a study of sediment behaviour through applied rheophysics on intertidal superficial sediments; (2) a hydro-sedimentary study based on identification of the forcing action (physical, biological or anthropogenic) on the intertidal flat stability over several time scales (from the event to several months); (3) a specific application of the model SiAM-2DH to the Marennes-Oléron Bay.  The surface sediments shows a mechanical behaviour that mainly depends on the fine fraction for a composition that contains up...
Tipo: Text
Palavras-chave: Rhéophysique; Seuil d’écoulement; Sédiments cohésifs et mixtes; Sédimentation; Érosion; Hydrodynamique; Vasière; Zone intertidale; Conchyliculture; ALTUS; SiAM-2DH; Baie de Marennes-Oléron; Rhéophysics; Shear strenght; Cohesive and mixed sediment; Sédimentation; Erosion; Hydrodynamics; Mudflat; Intertidal area; Oyster; ALTUS; SiAM-2DH; Marennes-Oléron Bay.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00004/11534/8117.pdf

Report of the Working Group on Report on Assessment of New MoU Species (WGNEW).18 - 22 March 2013, ICES HQ, Copenhagen, Denmark
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ICES.
The ICES Working Group on Assessment of New MoU Species met at ICES Head-quarters in Copenhagen, Denmark, during 18–22 March 2012. There were 9 partici-pants from 7 countries. The main task of WGNEW is to provide information on the new species and stocks of the MoU between ICES and the EC: Each year, different stocks are being dealt with, including but not limited to sea bass, striped red mullet, red gurnard, tub gurnard, grey gurnard, turbot, brill, dab, flounder, lemon sole, witch flounder, pollack and John dory. For most stocks, this information includes total international landings and research vessel survey data that are indicative of abundance trends. The International Bottom Trawl Survey (IBTS) was used often along other internationally coordinated...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00166/27694/25887.pdf

Les pêcheries françaises de Méditerranée. Synthèse des connaissances
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Campillo, Albert.
This document presents information about the bottom nature and hydrodynamic features of the coast off French Mediterranean sea. The economic importance of fisheries concerning divers areas and different aspects of the fleet dynamics are also tachled. The background of this study is the knowledge of the principal marine species exploited in the area (60 species of fish, 5 of shellfish, 8 of mollusca, one of echinoderma and one of Octocorallia). The species index includes biological information and exploitation date. A reference list is proposed for each species.
Tipo: Text
Palavras-chave: SEM; Aménagement; Exploitation; Distribution; Abondance relative; Biologie; Flottille; Economie; Management; Exploitation; Distribution; Abundance; Biology relative; Fleet; Economy.
Ano: 1993
URL: https://archimer.ifremer.fr/doc/00393/50468/51203.pdf

Operational oceanography in France : the Coriolis project
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Coatanoan, Christine; Carval, Thierry; Petit De La Villeon, Loic; Autret, Emmanuelle; Gouriou, Yves; Gourmelen, Loic.
An operational oceanographic system is being developed in France to monitor and forecast ocean behavior. It is composed of three projects: - Sea-surface observation using satellite sensors, - ln situ measurements from ships, moored or drifting autonomous systems, - Assimilation of in-situ and satellite data in an ocean circulation modal.  Coriolis contributes to the in situ part of this system,with the objective of developing continuous,automatic,and permanent observation networks. The data collected will enable water properties to be mapped, such as temperature, and ocean circulation. (NOT CONTROLLED OCR]
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/acte-4691.pdf

Reduced El Nino-Southern Oscillation during the Last Glacial Maximum
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ford, Heather L.; Ravelo, A. Christina; Polissar, Pratigya J.
El Nino-Southern Oscillation (ENSO) is a major source of global interannual variability, but its response to climate change is uncertain. Paleoclimate records from the Last Glacial Maximum (LGM) provide insight into ENSO behavior when global boundary conditions (ice sheet extent, atmospheric partial pressure of CO2) were different from those today. In this work, we reconstruct LGM temperature variability at equatorial Pacific sites using measurements of individual planktonic foraminifera shells. A deep equatorial thermocline altered the dynamics in the eastern equatorial cold tongue, resulting in reduced ENSO variability during the LGM compared to the Late Holocene. These results suggest that ENSO was not tied directly to the east-west temperature...
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00352/46282/45966.pdf

Evaluation scientifique des résultats des campagnes océanographiques françaises sur une période de 11 ans (1994-2004). Analyse bibliométrique des résultats scientifiques des campagnes océanographiques françaises sur la période 1994-2004. Rapport provisoire
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Comité Stratégique et Technique de la Flotte (CSTF).
Pour alimenter les réflexions et les recommandations du Comité Stratégique et Technique de la Flotte sur la question de l’impact scientifique des campagnes océanographiques françaises, une évaluation des résultats scientifiques des campagnes à la mer, s’appuyant sur les outils de la bibliométrie a été réalisée pour la période 1994-2004 (11 ans). L’étude a consisté en une analyse statistique de la quantité d’articles produits à l’issue des campagnes et de leur taux de citations. Tous les navires de la flotte océanographique française ont été considérés (Alis, Astrolabe, Atalante, Marion Dufresne, Nadir, Noroit, Suroit et Thalassa). Ont été aussi analysées les productions scientifiques des chercheurs français embarqués sur des navires étrangers. L’étude...
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00202/31309/29714.pdf

Niveau de ploïdie des naissains d'huître creuse captés dans les pertuis charentais, le bassin d'Arcahon et la baie de Bourgneuf. Réseau Biovigilance, campagne 2012
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Benabdelmouna, Abdellah; Maurouard, Elise; D'Amico, Florence; Seugnet, Jean-luc; Grizon, James.
Comme pour les années précédentes, le réseau biovigilance a réalisé en 2012 la caractérisation du niveau de ploïdie de naissains captés en 2011. En plus des deux principaux bassins de captage que sont Marennes Oléron et Arcachon, un bassin additionnel (baie de Bourgneuf) a été prospecté grâce à l’analyse de naissains sauvages captés en 2011 au niveau du site de la bernerie en Retz. Les échantillons des naissains sauvages issus du captage naturel ont été prélevés sur plusieurs sites de chaque bassin pour un total analysé de 1340 animaux. En tenant compte de l’échantillonnage, les résultats de suivi de ploïdie sont interprétés comme une absence d’animaux polyploïdes, triploïdes ou tétraploïdes, captés dans les trois bassins prospectés. Cependant, comme les...
Tipo: Text
Palavras-chave: Ploïdie; Huîtres creuses; Crassostrea gigas; Captage naissain; Pertuis Charentais; Bassin d'Arcachon; Baie de Bourgneuf.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00176/28730/27197.pdf

Lipid and lipid carbon stable isotope composition of the hydrothermal vent shrimp Mirocaris fortunata: evidence for nutritional dependence on photosynthetically fixed carbon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pond, David W; Segonzac, Michel; Bell, Michael V; Dixon, David R; Fallick, Anthony E; Sargent, John R.
Mirocaris fortunata were sampled from the Lucky Strike hydrothermal vent area (Eiffel Tower site) on the mid-Atlantic ridge during the French DIVA 2 cruise (June 1994). Small adults (17 to 22 mm total length), although morphologically identical, could be divided into 2 categories on the basis of pigmentation, lipid composition and C-13/C-12 stable isotope ratios of fatty acids. Highly pigmented small adults (8.6 to 9.2 mu g carotenoid shrimp(-1)) contained higher levels of total lipid than similar-sized individuals containing lower levels of pigment (0.9 to 2.9 mu g carotenoid shrimp(-1)). Lipid class analysis indicated that wax esters comprised 62.5% of total lipid in the former group. These pigmented shrimp also contained high proportions of...
Tipo: Text
Palavras-chave: Mirocaris fortunata; Lipid; Stable isotope; Hedge betting.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00337/44783/44491.pdf

Variabilité de la circulation de surface et intermédiaire aux moyennes latitudes de l'Atlantique Nord : réponse aux variations lentes et rapides du climat lors du dernier cycle glaciaire-interglaciaire
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boelaert, An.
La carotte de glace du Groenland (GRIP) a récemment révélée des variations rapides de la température atmosphérique des régions Nordiques de l'Atlantique Nord lors de la dernière période glaciaire [Dansgaard et al., 1993]. Ces variations rapides, les cycles de Dansgaard-Oeschger, sont caractérisés par un refroidissement progressif pendant quelques centaines d'années et un réchauffement rapide de l'ordre de 5°C en quelques dizaines d'années seulement.
Tipo: Text
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00034/14527/11827.pdf

Influence of periphyton substrates and rearing density on Liza aurata growth and production in marine nursery ponds
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Richard, Marion; Maurice, Julien-thomas; Anginot, Aurore; Paticat, Francois; Verdegem, M. C. J.; Hussenot, Jerome.
The main objectives of this investigation were to test the effects of (i) the presence of periphyton substrates, (ii) rearing density and (iii) supplemental feeding with dry feed on the growth and production of golden mullet (Liza aurata) juveniles. Twenty-six 1 m(2)-cages were installed in a French marine pond from April till June 2008. Mullets were stocked in cages with or without substrate at a density of 0, 20,40 or 60 individuals per cage. Each treatment was carried out in triplicate. In addition, 20 fish were put in three tanks and fed ad libitum with dry feed. The results showed that (i) although mullets were seen to graze on periphyton substrates, their presence did not affect,mullet growth and production. In future studies, meshed substrates could...
Tipo: Text
Palavras-chave: Periphyton; Mullet; Extensive aquaculture; Artificial substrate; Marine pond.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00029/14067/11614.pdf

Recherche d'une gestion au rendement maximal durable des ressources halieutiques exploitées par les navires français. Impact sur les productions et les rendements d'une gestion au RMD
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Biseau, Alain.
Après un rappel de la définition du RMD et des enjeux pour les ressources et leur exploitation, et une rapide synthèse de la situation actuelle, des scénarios 'vers le RMD' sont testés pour une certain nombre de stocks. Pour chacun les impacts en termes de biomasse et débarquements sont estimés. Outre différentes modalités de réduction de la mortalité par pêche, ces scénarios explorent les effets de changement des modalités d'exploitation (diagramme d'exploitation). Les exemples de simulations présentées montrent que les enjeux peuvent varier selon les stocks, en fonction de leur situation actuelle et de leur dynamique (biologie). Néanmoins, de ces situations contrastées, il est permis de tirer quelques enseignements : Les gains de production consécutifs à...
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00060/17150/14643.pdf

Etude de l'impact des engins de pêche trainants en zone cotière. Cas particulier du chalutage en Baie de Saint-Brieuc (Manche Ouest)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hamon, Dominique; Berthou, Patrick; Fifas, Spyros.
Tipo: Text
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00392/50359/51060.pdf

Ennemis et maladies des huîtres
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Nedelec, Claude.
Une huître d'un an produit environ 100.000 larves; une de 2 ans près de 250.000 larves; une de 3 ans entre 700.000 et 800.000 et une huître de plus de 3 ans : un million en moyenne. Le nombre de larves libérées chaque année par un seul banc d'huîtres se chiffre ainsi par milliards (R. Ph. Dollfus). Mais beaucoup, parmi ces jeunes larves nageuses, sont la proie d'animaux planctoniques; un grand nombre d'entre elles sont entraînées au large, sont tuées et ne se fixent pas.
Tipo: Text
Palavras-chave: Huîtres; Bivalvia; Maladies; Remède; Ennemis.
Ano: 1953
URL: http://archimer.ifremer.fr/doc/00003/11471/8030.pdf

Declining maerl vitality and habitat complexity across a dredging gradient: Insights from in situ sediment profile imagery (SPI)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bernard, Guillaume; Romero-ramirez, Alicia; Tauran, Adeline; Pantalos, Michael; Deflandre, Bruno; Grall, Jacques; Gremare, Antoine.
Maerl beds form complex biogenic benthic habitats, characterized by high productivity as well as diverse biological communities. Disturbances associated with extraction and/or fishing activities using mobile bottom-contacting gears such as clam-dredges induce the most severe and long-term effects on these fragile habitats. We here investigated the effects of dredge-fishing on maerl in the bay of Brest (France). We quantified maerl beds structure and vitality across a fine scale quantified dredging intensity gradient through the acquisition of in-situ images of beds cross-section using Sediment Profile Imaging system (SPI). Declines in the proxies of maerl vitality and habitat complexity were measured across the gradient, and were associated with...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00677/78861/81162.pdf

Données sur la biologie de Ruditapes philippinarum et Ruditapes decussatus en élevage sur la côte morbihannaise
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: De Kergariou, Gabriel; Latrouite, Daniel; Perodou, D.; Claude, Serge.
Des essais d'élevage de palourdes en milieu ouvert ont été réalisés sur le littoral morbihannais en 1979 et 1980. R. philippinarum atteint une taille commercialisable au bout de 18 mois à 2 ans suivant le site et la densité au semis. Les taux de survie observés sont supérieurs à 50% pour les essais réalisés en 1979, mais inférieurs pour ceux effectués en 1980. Une mortalité quasi totale de R. decussatus a été observée après 6 mois d'élevage, et la croissance des individus survivants est nettement moins rapide que pour l'espèce précédente. Les résultats montrent que R. philippinarum est mieux adaptée, et ils permettent de proposer un protocole d'élevage pour le secteur considéré.
Tipo: Text
Palavras-chave: Palourdes; Biologie; Ruditapes philippinarum; Ruditapes decussatus; Elevage; Morbihan.
Ano: 1981
URL: http://archimer.ifremer.fr/doc/00021/13258/10305.pdf

Bibliothèque La Pérouse : rapport d'activité 2010
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Henriet, Ottilia.
Pour la bibliothèque La Pérouse, l’année 2010 a confirmé les mutations profondes qui bouleversent les bibliothèques et centres de documentation depuis plusieurs années.  Le formidable progrès que représente l’accès à la documentation en ligne a modifié les comportements des chercheurs et des étudiants, contraignant les bibliothèques et centres de documentation à s’adapter.  En 2010, la BLP s’est donc attachée à : - Enrayer la désertification de notre site, pourtant si agréable et confortable, en proposant de nouveaux usages sur place, plus ouverts et plus conviviaux, - Tenir compte des nouveaux comportements en proposant de nouveaux services dédiés à chacun de nos publics, s’appuyant sur une enquête de besoins et sur une analyse de type marketing, -...
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00034/14567/11869.pdf

World Ocean Circulation Experiment - Argo Global Hydrographic Climatology
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gouretski, Viktor.
The paper describes the new gridded World Ocean Circulation Experiment-Argo Global Hydrographic Climatology (WAGHC). The climatology has a 1/4 degrees spatial resolution resolving the annual cycle of temperature and salinity on a monthly basis. Two versions of the climatology were produced and differ with respect to whether the spatial interpolation was performed on isobaric or isopycnal surfaces, respectively. The WAGHC climatology is based on the quality controlled temperature and salinity profiles obtained before January 2016, and the average climatological year is in the range from 2008 to 2012. To avoid biases due to the significant step-like decrease of the data below 2 km, the profile extrapolation procedure is implemented. We compare the WAGHC...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00675/78680/80880.pdf

Inventaire préliminaire des formations de posidonies dans le golfe d'Aigues-Mortes (Méditerranée nord-occidentale)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bodoy, Alain; Nicolas, Frédéric; Vaulot, Dominique.
Tipo: Text
Ano: 1982
URL: http://archimer.ifremer.fr/doc/00040/15114/12450.pdf

On the use of sea-level gauge data for satellite altimetry validation - a review
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Leprovost, C.
The altimetric sea-level data base supplied by the satellite Geosat has permitted numerous studies in the field of ocean science, some of which have addressed, through comparisons with island gauge observations, the question of the quality of the sea level products inferred from die Geosat dataset. The aim of this paper is to provide an overview of these recent studies, illustrating the usefulness of in situ sea level gauge measurements for satellite altimetry validation, to present briefly the status of the present worldwide sea level network, and to provide some guidelines on what must be done in the near future to improve this network further. It is shown that some of the discrepancies between altimeter products and tide gauge records are due to...
Tipo: Text
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00101/21238/18853.pdf

Delayed mode quality control of Ovide Argo Data. Float WMO 6900406
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lagadec, Catherine; Thierry, Virginie; Cabanes, Cecile.
This report presents the delayed mode analysis of an Argo float. Real time quality control flags are checked and interesting profiles are plotted.  The OW method (objective analysis) is used to detect a conductivity sensor drift and correct it, if any.
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00311/42199/41514.pdf

Dynamics of North Atlantic Deep Water masses during the Holocene
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hoogakker, Babette A. A.; Chapman, Mark R.; Mccave, I. Nick; Hillaire-marcel, Claude; Ellison, Christopher R. W.; Hall, Ian R.; Telford, Richard J.
High resolution flow speed reconstructions of two core sites located on Gardar Drift in the northeast Atlantic Basin and Orphan Knoll in the northwest Atlantic Basin reveal a long-term decrease in flow speed of Northeast Atlantic Deep Water (NEADW) after 6,500 years. Benthic foraminiferal oxygen isotopes of sites currently bathed in NEADW show a 0.2 parts per thousand depletion after 6,500 years, shortly after the start of the development of a carbon isotope gradient between NEADW and Norwegian Sea Deep Water. We consider these changes in near-bottom flow vigor and benthic foraminiferal isotope records to mark a significant reorganization of the Holocene deep ocean circulation, and attribute the changes to a weakening of NEADW flow during the mid to late...
Tipo: Text
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00227/33787/32562.pdf

Le partage de l'eau entre les différents utilisateurs : l'exemple des Pertuis Charentais
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Prou, Jean.
Managing the water resource finds a special dimension on the coastal strip. This resource is not shared between the different users according to the classical schemes of catchment areas, linking quality and quantity. The measure of a river water flow turns into currents in the marine field and the freshwater volumes turn into salinity units illustrating the fresh water / salt water mix. As a consequence, in a participative management approach as recommended by the GIZC (Integrated Management of the Coastal Zone) procedures, it seems fundamental that the actors from the terrestrial and marine worlds and their interfaces share their perceptions in order to improve the quality of the management scenarios. This shared perception of the catchment area and...
Tipo: Text
Palavras-chave: Charente Maritime; Pertuis charentais; Gestion eau; Conchyliculture.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/acte-3516.pdf

Variations spatio-temporelles de l'infestation des huitres creuses, Crassostrea Gigas, par les vers du genre Polydora (Annelides Polychetes), dans le cadre du reseau Ifremer/REMORA.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Duault, Céline; Gillet, Patrick.
The worms Polydora. damage the oysters, Crassostrea gigas, by foraging the shell, training the formation of galleries and chambers with mud. The IFREMER'S REMORA network which has in charge to survey the oysters Crassostrea gigas in France, has showed an increase of the infestation of oysters since 1993 (first year of the network). The study had for goal first to estimate the spatial and temporal variations of the infestation of the oysters in 1999, by using two methods: the infestation index, the number of worms by individual and a quality index, the Polydora Index (IP varies from 0 to 1) which is based on 5 classes of the oysters quality (from 0 to 4) in relation to the aspect of the valves
Tipo: Text
Palavras-chave: REMORA network; Infestation; Crassostrea gigas; Polydora sp.; Réseau REMORA; Infestation; Crassostrea gigas; Polydora sp.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-2447.pdf

GIS in support to data analysis for enhanced sustainability of shrimp farming in the Mekong Delta, Vietnam
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Populus, Jacques; Nutpramoon, Raweewan; Martin, Jean-louis; Raux, Pascal; Auda, Yves; Son, Hoang.
Over the last twenty years, extensive shrimp aquaculture has dramatically expanded in the coastal fringe of the Mekong Delta. This occurred primarily at the expense of the mangrove, already severely affected by the Vietnam war. More recently, paddy land has been reclaimed for shrimp aquaculture, a higher currency earner. However, production collapses have frequently occurred and the overall yield has remained far below the expectations for traditional farming. A number of parameters enter into play in the success of this activity, summarized in two questions: i) is the Mekong deltaïc environment - under high continental pressure - suitable to shrimp farming, ii) if not, is it possible to adapt the low technicity of rural poor farmers to reach economic...
Tipo: Text
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00172/28322/26600.pdf

Le REBENT-II Bretagne. Surveillance du Benthos du littoral breton
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Derrien-courtel, Sandrine; Ar Gall, Erwan; Broudin, C; Decaris, Fx; Derrien, R; Houbin, C; Le Duff, M; Le Gal, A; Maguer, M; Perrier, Lucile; Thiebaut, E.
Ce « Rapport final » dresse le bilan des données REBENT acquises en 2017.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00677/78909/81261.pdf

Rapport sur l'utilisation du sondeur multifaisceaux ME70 lors des campagnes Pelgas08 et Class08
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Doray, Mathieu; Petitgas, Pierre; Masse, Jacques; Trenkel, Verena.
Report on Simrad ME70 multibeam echosounder operations during Pelgas08 and Class08 sea surveys. First observations of small pelagic fish 3D aggregative structures
Tipo: Text
Palavras-chave: Pelagic ecosystem; Bay of Biscay; 3D fisheries acoustics; Multibeam echosounder; Écosystème pélagique; Golfe de Gascogne; Acoustique halieutique 3D; Sondeur multifaisceaux.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/rapport-6314.pdf

Valorisation de matières premières marines de faible valeur ajoutée : application aux co-produits de thon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Nguyen, Thi-my-huong.
The main objective of this study is the valorisation of by-products coming from processed tuna (Thunnus albacares). Therefore, enzymatic hydrolysis was selected, using an industrial large spectrum protease (Protamex). In a first phase, hydrolyses of these by-products (heads, tails, viscera) were carried out for long periods of time (12h) in order to establish the kinetics of the proteolysis of those different by-products and to obtain the approximate composition of the different resulting fractions and to determine the conditions which would allow the  valorisation of these  fractions.  In a second phase the valorisation in animal nutrition (shrimp culture) and in human nutrition (fish sauce) of the fractions coming from the hydrolysis of the head of tunas...
Tipo: Text
Palavras-chave: Feed; Food; Lipids; Peptids; Protamex; Proteolysis; By products; Thuna; Alimentation; Lipides; Peptides; Protamex; Protéolyse; Co produits; Thon.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/these-6918.pdf

Nonseismic Signals in the Ocean: Indicators of Deep Sea and Seafloor Processes on Ocean‐Bottom Seismometer Data
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Batsi, Evangelia; Tsang‐hin‐sun, Eve; Klingelhoefer, Frauke; Bayrakci, Gaye; Chang, Emmy T.y.; Lin, Jing‐yi; Dellong, David; Monteil, Clément; Géli, Louis.
Ocean bottom seismometers (OBS) commonly record short duration events (SDEs), that could be described by all of these characteristics: (i) duration &lt; 1 s, (ii) one single‐wave train with no identified P‐ nor S‐wave arrivals and (iii) a dominant frequency usually between 4 Hz and 30 Hz. In many areas, SDEs have been associated with gas or fluid‐related processes near cold seeps or hydrothermal vents, although fish bumps, instrumental or current‐generated noise have been proposed as possible sources. In order to address some remaining issues, this study presents results from in situ and laboratory experiments combined with observations from 2 contrasting areas, the Sea of Marmara (Turkey) and the Chilean subduction zone. The in situ experiment was...
Tipo: Text
Palavras-chave: Marine seismology; Gas and fluid migration; Sea of Marmara; Chilean subduction.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00507/61895/65983.pdf

Synthèse des connaissances sur les impacts des câbles électriques sous-marins: Phases de travaux et d'exploitation. Etude du compartiment benthique et des ressources halieutiques
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Carlier, Antoine; Vogel, Camille; Alemany, Juliette.
Cette synthèse bibliographique, financée par RTE, traite de l’impact potentiel des câbles électriques sous-marins sur différentes composantes des écosystèmes marins côtiers susceptibles d’accueillir des projets de liaisons électriques en mer. Elle constitue une actualisation d’un précédent état de l’art réalisé sur la même problématique par l’Ifremer en 2011, déjà à la demande de RTE. Ce rapport traite successivement des différents types de perturbations que peut engendrer un projet de câble sous-marin, pendant les phases de travaux (pose, maintenance) et d’exploitation, en distinguant ce qui relève des changements des paramètres physico-chimiques du milieu (ce que l’on désigne ici par effets) de ce qui relève des changements de la biodiversité et des...
Tipo: Text
Palavras-chave: Câbles sous-marins; Impacts; Travaux; Exploitation; Écosystèmes côtiers; Habitats benthiques; Ressources halieutiques; Bruit; Température; Champs électromagnétiques; Effet récif; Effet réserve; Impact cumulés.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00508/61975/66078.pdf

Levantine intermediate water hydrodynamic and bottom water ventilation in the northern Tyrrhenian Sea over the past 56,000 years: New insights from benthic foraminifera and ostracods
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Minto'O, Charlie Morelle Angue; Bassetti, Maria-angela; Morigi, Caterina; Ducassou, Emmanuelle; Toucanne, Samuel; Jouet, Gwenael; Mulder, Thierry.
Foraminifera and ostracods have been quantitatively studied in core MD01-2472, from the upper continental slope (at water depth of 501 m), to evaluate their relationship with bottom water condition variability and decipher the control of the Levantine Intermediate Water (LIW) current on benthic faunas. The occurrence of reworked ostracod species (originating from the continental shelf) and, the presence of shallow water Elphidium/Ammonia benthic foraminifera are used to estimate the degree of along-slope transport at the core site. This has revealed two intervals of along-slope transport also associated with coarse-grained contourite deposits, deposited during the YD and HS2 episodes. Planktonic-benthic foraminiferal and ostracod assemblages reflect...
Tipo: Text
Palavras-chave: Ostracods; Foraminifera; LIW; Corsica margin.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00245/35648/34208.pdf

Recueil des campagnes océanographiques françaises 2001
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer.
Ce recueil présente les résumés des campagnes océanographiques civiles qui se sont déroulées en 2001 sur les navires français ou en coopération sur d’autres navires. Les navires océanographiques français civils sont gérés par les organismes suivants : * CNRS/INSU (Centre National de la Recherche Scientifique / Institut National des Sciences de l’Univers) * IFREMER (Institut Français de Recherche pour l’Exploitation de la Mer) * IPEV (Institut Polaire Français – Paul Emile Victor) * IRD (Institut de Recherche et Développement, anciennement ORSTOM) Les résumés de campagnes sont publiés annuellement dans ce recueil depuis l’année 1977, et archivés dans la base SISMER « Campagnes Océanographiques Françaises ». L’inventaire complet des campagnes...
Tipo: Text
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00432/54369/55699.pdf

Estimation and propagation of uncertainties associated with paleomagnetic directions
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Heslop, David; Roberts, Andrew P.
Principal component analysis (PCA) is a well-established technique in paleomagnetism and provides a means to estimate magnetic remanence directions from univectorial segments of stepwise demagnetization data. Derived directions constrain past geomagnetic field behavior and form the foundation of chronological and tectonic reconstructions. PCA of isolated remanence segments relies on estimates of the segment mean and covariance matrix, which can carry large uncertainties given the relatively small number of demagnetization data points used to characterize individual specimens. Traditional PCA does not, however, lend itself to quantification of these uncertainties, and inferences drawn from paleomagnetic reconstructions suffer from an inability to propagate...
Tipo: Text
Palavras-chave: Paleomagnetism; Directional uncertainty; Principal component analysis.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00421/53255/54707.pdf

Protein sources in feed for farmed fish
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Medale, Francoise; Kaushik, Sadasivam.
Fish require diets containing 30 to 55% of crude protein and an amino acid supply precisely adapted to meeting the needs for optimal growth. Fish meal is an ideal protein source for aquafeed because it has a high protein level (65% to 72%) with an ideal proportion of all ten indispensable amino acids that meet the requirements of all fish species. However, finding alternatives to fish meal has become an absolute necessity in order to reduce the reliance of aquaculture on marine ingredients. Animal by-product meals (meat meal, bone meal, blood meal, poultry by-product meal, hydrolysed feather meal) are used as alternative protein sources in aquafeed in extra-European countries. Since the use of animal protein in aquafeed is forbidden in Europe (except non...
Tipo: Text
Palavras-chave: Plant proteins; Fish meal; Fish feeding; Antinutritionnal factors; Amino acids.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6556.pdf

La capacité biotique des bassins ostréicoles
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Heral, Maurice; Bacher, Cedric; Deslous-paoli, Jean-marc.
Maurice Héral has been studying, since 1976 at the IFREMER Station of La Tremblade (France), the trophic networks of shellfish-farming ecosystems and, especially, the variability of available food, energy assessment, the ecophysiology of the Japanese oyster; he has set up a comprehensive model of shellfish farming production. He has been managing the Shellfish Farming Ecosystems Laboratory (LEC) since 1980. A specialist of digital models, Cédric Bacher has been working at the LEC since 1985. He invented a strategy of sampling farmed molluscs' biomass and a preliminary, analytic trophic model that combines physical and biological systems. Jean-Marc Deslous-Paoli has been a member of the same laboratory since 1979, where his work focuses on monitoring...
Tipo: Text
Palavras-chave: Modèle analytique; Modélisation; Modéle global; Production; Capacité trophique; Biomasse; Climatologie; Captage naissain; Bassin Marennes Oléron.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/publication-3011.pdf

The presence of metallothionein-like proteins in the liver of 2 species of flatfish - limanda-limanda and microstomus kitt
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Duquesne, S; Richard, A.
Two species of flatfish, Limanda Limanda (dab) and Microstomus kitt (lemon-dab) were injected intraperitoneally with Cd to determine the nature of the metal-binding proteins induced in their livers. The supernatants were analysed by gel filtration chromatography and the levels of metal and sulfhydryl groups, as well as the spectral behaviour of the low molecular weight proteins, provided evidence that the hepatic metal-binding proteins induced in the two flatfish belong to the family of metallothionein-like proteins.
Tipo: Text
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00097/20865/18483.pdf

Argo data management report 2014. Coriolis DAC &amp; GDAC
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Carval, Thierry; Coatanoan, Christine; Cabanes, Cecile.
This report covers the activity of Coriolis data centre for a one year period from October 1st 2013 to September 30th 2014.
Tipo: Text
Palavras-chave: Argo; Argo.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00221/33248/31724.pdf

Les tendances du marché français de la salmoniculture
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bailly, Denis.
Trout and salmon market is one of the major markets for fish in France. The domestic  production covers the demand for trout and it is very stable (30.000 tons) after a rapid expansion during the early eighties. With the rapid expansion of the world production, the price for salmon has been steadily decreasing since 1986. The French market for salmon depends completely on imports. The quantity imported increases more rapidly than the drop of the price. Salmon import is the main cause for the deficit of the trade of seaproducts in France. Salmon production is not likely to expand significantly during the coming years. The troutproduction sector seems to be at the point where the commercial benefits (quality control, trade scale economies, promotion...) may...
Tipo: Text
Palavras-chave: SEM.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/publication-4234.pdf

Parametrization of physical phenomena in a mud transport numerical model
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: De Nadaillac, Guy.
The choice of erosion, deposition and settling velocity empirical formula as well as consolidation algorithm is difficult. Through a one-dimensional and a "point" models, these formulations are studied. When tidally forced, results appear to be very sensitive to the involved coefficients. Simple models are then useful to get a comprehensive idea of the effects of the mathematical schematizationos : in a more complicated mud transport numerical model.
Tipo: Text
Ano: 1985
URL: http://archimer.ifremer.fr/doc/00080/19148/16743.pdf

Using aerobic exercise to evaluate sub-lethal tolerance of acute warming in fishes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Blasco, Felipe R.; Esbaugh, Andrew J.; Killen, Shaun S.; Rantin, Francisco Tadeu; Taylor, Edwin W.; Mckenzie, David.
We investigated whether fatigue from sustained aerobic swimming provides a sub-lethal endpoint to define tolerance of acute warming in fishes, as an alternative to loss of equilibrium (LOE) during a critical thermal maximum (CTmax) protocol. Two species were studied, Nile tilapia (Oreochromis niloticus) and pacu (Piaractus mesopotamicus). Each fish underwent an incremental swim test to determine gait transition speed (U-GT), where it first engaged the unsteady anaerobic swimming mode that preceded fatigue. After suitable recovery, each fish was exercised at 85% of their own U-GT and warmed 1 degrees C every 30 min, to identify the temperature at which they fatigued, denoted as CTswim. Fish were also submitted to a standard CTmax, warming at the same rate...
Tipo: Text
Palavras-chave: CTmax; Oreochromis niloticus; Piaractus mesopotamicus.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00640/75188/75324.pdf

Voyages en Scandinavie, en Laponie, au Spitzberg et aux Feröe, pendant les années 1838, 1839, 1840 sur la corvette la Recherche. Vol. 2, part. 2
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lottin, V.
Les observations que nous publions ici ont été faites avec une boussole d'intensité horizontale (n°1 de Gambey), établie sur un pied conforme au modèle adopté au Dépôt des cartes de la marine.
Tipo: Text
Palavras-chave: Histoire; Campagne; Laponie; Spitzberg; Féröe; Scandinavie; Magnétisme.
Ano: 1842
URL: http://archimer.ifremer.fr/doc/00002/11357/7930.pdf

Radiolarian distribution in east equatorial pacific plankton
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boltovskoy, D; Jankilevich, Ss.
Tipo: Text
Ano: 1985
URL: http://archimer.ifremer.fr/doc/00112/22296/19971.pdf

The Effects of Feed Restriction and Isolated or Group Rearing on the Measurement of Individual Feed Intake and Estimation of Feed Conversion Ratio in Juvenile Nile Tilapia (Oreochromis niloticus) for Selective Breeding Purposes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rodde, Charles; Vandeputte, Marc; Quoc Trinh, Trong; Douchet, Vincent; Canonne, Marc; Benzie, John A. H.; De Verdal, Hugues.
Accurately measuring the phenotype at the individual level is critical to the success of selective breeding programs. Feed efficiency is a key sustainability trait and is typically approached through feed conversion ratio (FCR). This requires measurements of body weight gain (BWG) and feed intake (FI), the latter being technically challenging in fish. We assessed two of the principal methods for measuring feed intake in fish over consecutive days: (1) group rearing 10 fish per group and video recording the meals and (2) rearing fish individually on a restricted ration. Juvenile Nile tilapia (Oreochromis niloticus) from the Genetically Improved Farmed Tilapia (GIFT) strain and the Cirad strain were entered into the study (128 GIFT and 109 Cirad). The GIFT...
Tipo: Text
Palavras-chave: Feed efficiency; Individual rearing; Group rearing; Fish; Video analyses; Feed intake.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00677/78924/81292.pdf

Avis de l'Ifremer sur la pertinence d'une augmentation du nombre d'autorisations annuelles de pêche au filet sur le littoral girondin en 2015
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Caill-milly, Nathalie; Morandeau, Gilles; Oger-jeanneret, Helene.
demande d'avis de l’Ifremer sur la pertinence d’une augmentation du nombre d’autorisations annuelles de pêche au filet sur le littoral girondin, à hauteur de 16, pour l’année 2015, pour atteindre 266 au total.
Tipo: Text
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00250/36099/79267.pdf

Rain-derived particles and CDOM distribution along the East Coast of New Caledonia
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dupouy, Cecile; Wattelez, Guillaume; Lefevre, Jerome; Juillot, Farid; Andreoli, Remi; Lille, Didier; Murakami, Hiroshi; Roettgers, Rudiger; Frouin, Robert.
Shortly after strong rains or tropical storms, chlorophyll-a concentration (Chla), turbidity, and colored dissolved organic matter (CDOM) in the lagoon of New Caledonia may be tripled. This effect is visible as far as 50 km offshore. The Eastern Coast of New Caledonia is more impacted than the Western Coast because of its geomorphological structure. Higher frequency and intensity of the rains, and the dominance of highly erosive lateritic formations resulted from deep weathering of ultramafic rocks. At the deeper parts of the lagoon (&gt; 20 m), increases of Chla, turbidity, and CDOM absorption can be detected by satellite imagery with their plumes extending off shore as a result of wind-driven circulation in the lagoon. Such -increases agree with the...
Tipo: Text
Palavras-chave: Minerals; Phytoplankton; CDOM; FDOM; Ocean color; Reflectance; New Caledonia; Tropical Pacific Ocean; Lagoons.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00481/59308/62064.pdf

Etude d'un système de filtration de l'eau de mer pour l'alimentation des bassins conchylicoles insubmersibles durant des efflorescences toxiques. Rapport de fin de contrat : Cas d'une efflorescence à Alexandrium minutum et à Dinophysis spp
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mondeguer, Florence; Marcaillou-le Baut, Claire.
Le littoral français est touché tous les ans par des proliférations d'algues toxiques dont l'ampleur géographique et la durée sont très variables selon les genres/espèces et les années. Par exemple, à partir du mois de mai, voire fin avril certaines années, les côtes sud de la Bretagne et celles des Pays de la Loire sont touchées par des proliférations de Dinophysis spp, genre responsable des intoxications diarrhéiques et cause la plus fréquente des fermetures de zones conchylicoles. Depuis 1988, la côte nord de la Bretagne est exposée à des efflorescences à Alexandrium minutum, producteur de toxines paralysantes. Ces fermetures répétées s'accompagnent d'une diminution, voire d'une cessation d'activité pour les établissements d'expédition car...
Tipo: Text
Ano: 2005
URL: http://archimer.ifremer.fr/doc/00154/26512/24630.pdf

Contamination de l'environnement littoral par les rotavirus du groupe A
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dubois, Eric; Le Guyader, Francoise; Kopecka, Helena; Miossec, Laurence; Pommepuy, Monique.
Tipo: Text
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00116/22699/20439.pdf

Report of the Working Group for Celtic Seas Ecoregion (WGCSE) 8–17 May 2013 Copenhagen, Denmark
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ICES.
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00166/27682/25875.pdf

Different particle sources in a bivalve species of a coastal lagoon: evidence from stable isotopes, fatty acids, and compound-specific stable isotopes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mathieu-resuge, Margaux; Schaal, Gauthier; Kraffe, Edouard; Corvaisier, Rudolph; Lebeau, Oanez; Lluch-cota, Salvador E.; Salgado García, Rosa L.; Kainz, Martin J.; Le Grand, Fabienne.
The trophic fate of various food sources is of central interest for ecologists, yet not well understood in coastal lagoon food webs. In this field study, fatty acids (FA), stable isotopes (SI), and compound-specific isotopic analysis (CSIA) on FA were used to investigate how diets from oceanic and local sources are retained in a bivalve species (Spondylus crassisquama; Lamarck 1819) along a transect in the Ojo de Liebre lagoon (BCS, Mexico). Results from SI and FA indicated the contribution of oceanic diatoms at the entrance of the lagoon, through 15N enrichment, and higher proportions of 16:1n-7 and 20:5n-3 in digestive glands. In the inner bay, higher abundance of 18-carbon FA (18:1n-9, 18:3n-3, 18:4n-3) suggested a higher contribution of...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00501/61306/64914.pdf

Aspects of the geochemistry of dissolved and particulate Cd, Cu, Ni, Co, and Pb in the Dover Strait
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: James, Rh; Statham, Pj; Morley, Nh; Burton, Jd.
Water column samples have been collected at six stations across the Dover Strait within the framework of the FluxManche programme every month for fifteen months and analyzed for particulate and dissolved trace metals. Important seasonal variations in trace metal distributions have been identified. Dissolved Cu and Ni exhibit similar behaviour in the Strait; while seasonal variation in their distribution may be determined by changes in freshwater input, additional processes including biological uptake and regeneration and benthic input probably perturb water column inventories. Consistently with the suggestion of other authors, Co and Mn in both the dissolved and particulate phase exhibit some degree of covariance; substantial increases in the concentration...
Tipo: Text
Palavras-chave: FLUXMANCHE; TRACE METALS; GEOCHEMISTRY; SHELF SEAS; TEMPORAL VARIATION.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00100/21077/18702.pdf

A cost-effectiveness analysis of alternative survey methods used for the monitoring of marine recreational fishing in France
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bellanger, Manuel; Levrel, Harold.
The growth of marine recreational activities raises the issues of the current lack of knowledge on these activities and the information required to assess their potential impacts. Indeed, the monitoring of unrecorded activities is a great challenge, especially when basic information, such as the size of the population practicing the different activities, is unknown. In this paper, the experience of the monitoring of marine recreational fishing was used to carry out a diagnosis study to assess the cost-effectiveness of survey methods used in France between 2004 and 2012. Costs of alternative surveys were balanced with data quality, and particular attention was paid to potential biases. Results showed that the involvement of citizens through diary surveys...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00366/47769/47855.pdf

Etude écophysiologique du développement des jeunes stades de Sargassum muticum (Yendo) Fensholt, et analyse de quelques paramètres de la population naturelle du platier de Pleubian
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dion, Patrick.
INTRODUCTION - Originaire du Japon, l'algue phéophycée S. muticum est apparue vers 1975 en Normandie, après avoir été introduite accidentellement quelques années plus tôt en Grande-Bretagne. Cette espèce n'a cessé, depuis, de proliférer le long des côtes françaises. Son implantation actuelle en Bretagne est localement favorisée par l'existence de retenues d'eau et de chenaux qui parsèment les grands espaces découvrant de la zone de balancement des marées. Pour ce qui des données biologiques existantes concernant cette algue, des étapes de sa progression géographique, des nuisances occasionnées et des moyens de lutte inventoriés, on se reportera aux documents de synthèse émanant du groupe "Sargasse" animé par IFREMER (cf. BELSHER 1983, BELSHER 1986). Les...
Tipo: Text
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00077/18789/16366.pdf

Maternally Inherited npm2 mRNA Is Crucial for Egg Developmental Competence in Zebrafish
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bouleau, Aurelien; Desvignes, Thomas; Traverso, Juan Martin; Nguyen, Thaovi; Chesnel, Franck; Fauvel, Christian; Bobe, Julien.
The molecular mechanisms underlying and determining egg developmental competence remain poorly understood in vertebrates. Nucleoplasmin (Npm2) is one of the few known maternal effect genes in mammals, but this maternal effect has never been demonstrated in nonmammalian species. A link between developmental competence and the abundance of npm2 maternal mRNA in the egg was previously established using a teleost fish model for egg quality. The importance of maternal npm2 mRNA for egg developmental competence remains unknown in any vertebrate species. In the present study, we aimed to characterize the contribution of npm2 maternal mRNA to early developmental success in zebrafish using a knockdown strategy. We report here the oocyte- specific expression of npm2...
Tipo: Text
Palavras-chave: Egg quality; Fish; Maternal effect gene; Maternal-to-zygotic transition; Nucleoplasmin; Oocyte developmental competence; Teleost; Zygotic genome activation.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00211/32234/30685.pdf

MEMENTO – Bancarisation SI Quadrige. Aide à la rédaction de textes réglementaires et des pièces contractuelles de marchés
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Duval, Magali; Durand, Gaetane; Gauthier, Emilie; Lamoureux, Alice; Huguet, Antoine.
Ce mémento est une aide à la rédaction de textes réglementaires et des pièces contractuelles de marchés. Il présente de manière simplifiée les éléments à prendre en considération pour la rédaction des paragraphes liés à la bancarisation des données dans le SI Quadrige et ses applications. Il est destiné aux organismes en charge de la rédaction des documents pré-cités (DEAL, Agence de l'Eau, Office de l'Eau, ….).
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00483/59421/62226.pdf

Qualité du Milieu Marin Littoral. Bulletin de la surveillance 2016. Département du Finistère
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer/ODE/LITTORAL/LERBO/17‐005/Laboratoire Environnement Ressources de Concarneau.
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00388/49888/50449.pdf

Microstructure and tensile properties of carbon-epoxy laminates produced by automated fibre placement: Influence of a caul plate on the effects of gap and overlap embedded defects
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lan, Marine; Cartie, Denis; Davies, Peter; Baley, Christophe.
Automated fibre placement (AFP) enables the trajectory of unidirectional composite tape to be optimized, but laying down complex shapes with this technology can result in the introduction of defects. The aim of this experimental study is to investigate the influence of gaps and overlaps on the microstructure and tensile properties of carbon-epoxy laminates. First, a comparison between a hand-layup and AFP layup, draped and cured under the same conditions, shows equivalent microstructures and tensile properties. This provides the reference values for the study. Then, gap and overlap embedded defects (more or less severe) are introduced during manufacturing, on two cross-ply layups [(0°/(90°)5/0°] and [(90°/0°)2/90°]. Autoclave cure without a caul plate...
Tipo: Text
Palavras-chave: Carbon fibre; Defects; Mechanical properties; Automated fibre placement (AR).
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00275/38609/37138.pdf

Ressources démersales du talus insulaire de la Martinique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guillou, Alain.
A series of experimental fishing stations by means of bottom trarnmelnets have been conducted on the slopeof Martinique between 100 and 300 mn depth from november 1986 to march 1988, as part of a program entitled «Antillean Fisheries study» of the Pôle de Recherche Oceanologique et Halieutique Caraïbe». The species composition of the catches and the length frequencies of the potential commercial species, with a detailed analysis of their yields according to the depth and to the geographie localization are given. The whole average yield reaches 20 to 25 kg, two thirds of sharks, for 100 rn trarnmelnet set during approximately twenty hours. Furthennore, the main technical, commercial and human problems which are necessarily to be integrated and elucidated...
Tipo: Text
Palavras-chave: Pêcherie artisanale; Martinique; Evaluation; Ressources; Filet; Trémail; Talus; Analyse capture; Rendements.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00455/56655/58397.pdf

Evolution de la relation hétérozygotie-croissance et du déficit en hétérozygotes dans une population synthétique d'Ostrea edulis
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Clerc, Frédéric.
Ce stage prend place au début d'une étude sur des populations synthétiques de larves d'Ostrea edulis. La constitution d'une population de larves à partir du croisement d'une cinquantaine d'individus parentaux, puis l'échantillonage, à différents stades, d'une fraction représentative de cette population (200 larves à chaque fois) pour des mesures individuelles et une analyse microsatellite de chaque larve comporte un grand nombre d'intérêts: 1) Le suivi du déficit en hétérozygotes dans la population, en relation avec les points précédents, apportera des éléments pour la compréhension des données génétiques observées en populations naturelles. 2) Le suivi dans le temps de la relation hétérozygotie-croissance au sein d'une même population (à l'aide des...
Tipo: Text
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00411/52210/52934.pdf

Constitution of broodstock, maturation, spawning and hatching systems for Penaeid shrimps int the Centre Océanologique du Pacifique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: AQUACOP.
The Centre National pour l'Exploitation des Océans (CNEXO) has developed a tropical aquaculture program. For this, the CNEXO reckons on the Centre Océanologique du Pacifique (COP) , located in TAHITI (French Polynesia), and the Station d'Aquaculture de St-Vincent, located in NEW CALEDONIA. The tropical area seems to be highly propicious to the development of Penaeid shrimp farming, due to the high temperature which allows full production throughout the year. [NOT CONTROLLED OCR]
Tipo: Text
Ano: 1982
URL: http://archimer.ifremer.fr/doc/1982/rapport-4451.pdf

Large to submesoscale surface circulation and its implications on biogeochemical/biological horizontal distributions during the OUTPACE cruise (SouthWest Pacific)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rousselet, Louise; De Verneil, Alain; Doglioli, Andrea M.; Petrenko, Anne A.; Duhamel, Solange; Maes, Christophe; Blanke, Bruno.
The patterns of the large-scale, meso- and submesoscale surface circulation on biogeochemical and biological distributions are examined in the Western Tropical South Pacific (WTSP) in the context of the OUTPACE cruise (Feb–April 2015). Multi-disciplinary original in situ observations were achieved along a zonal transect through the WTSP and their analysis was coupled with satellite data. The use of Lagrangian diagnostics allows for the identification of water mass pathways, mesoscale structures, and submesoscale features such as fronts. In particular, we confirmed the existence of a global wind-driven southward circulation of surface waters in the entire WTSP, using a new high-resolution altimetry-derived product, validated by in situ drifters, that...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00420/53119/54071.pdf

Resource Assessment for Cornwall, Isles of Scilly and PNMI. Task 1.2 of WP3 from the MERiFIC Project.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Smith, Helen; Maisondieu, Christophe; Van Nieuwkoop, Joana; Boufferouk, Abdessalem.
This report provides an overview of resource assessment techniques for marine energy developments and the requirements at different stages of project development. It then details the studies that have been completed in Cornwall and the Isles of Scilly (Section 3) and Finistère and PNMI (Section 4). These studies combine shorter-term in situ measurements, using a range of measurement technologies, and numerical modelling to provide long-term and geographically diverse records.
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00203/31442/29839.pdf

Evidence for a sacrificial response to predation in the reproductive strategy of the comatulid crinoid Antedon bifida from the English Channel
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Nichols, D.
A population of the North-East Atlantic feather star Antedon bifida (Pennant) from a site in strong currents off South Devon, U.K., maintains a high level of maturity throughout its annual cycle, yet spawns only at a precise period of the year. Most individuals lose a proportion (mean: 17 %) of their pinnules from predation by the corkwing wrasse, Crenilabrus melops. An account of some aspects of predation of the crinoid by the fish is given. It is suggested that the crinoid maintains the maturity of its reproductive tissues at an unusually high level throughout the year so that the predator will take the pinnules, including the energy-rich gonads, in preference to the more vulnerable calyx. It is also suggested that a stress-response may be involved in...
Tipo: Text
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00094/20482/18152.pdf

Seasonal-variations in conservative and nonconservative mixing of nitrogen-compounds in a west european macrotidal estuary
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Treguer, Paul; Queguiner, B.
Tipo: Text
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00106/21734/19307.pdf

A comparative analysis of Alexandrium catenella/tamarense blooms in Annaba Bay (Algeria) and Thau lagoon (France); phosphorus limitation as a trigger
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hadjadji, Imene; Frehi, Hocine; Ayada, Lembarek; Abadie, Eric; Collos, Yves.
Environmental conditions ultimately leading to blooms of the toxic dinoflagellate Alexandrium catenella/tamarense were investigated at two Mediterranean sites (Annaba Bay, Algeria and Thau lagoon, France). Three years were examined in details: 1992 (a pre-Alexandrium period), 2002 (a year with the first bloom in Annaba) and 2010 (a year with a major bloom in Annaba). Most conditions were similar, but ammonium concentrations were much higher in Annaba (up to 100 μM) than in Thau (up to 10 μM). First records of A. catenella/tamarense were in 1995 for Thau and 2002 for Annaba, and coincided with soluble reactive phosphorus (SRP) decreasing below a concentration of about 1 μM. No other environmental variable could be related to those blooms. Thus, it is likely...
Tipo: Text
Palavras-chave: Alexandrium catenella/tamarense; Blooms; Algeria; France; Mediterranean.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00174/28574/26995.pdf

In situ localization and tissue distribution of ostreid herpesvirus 1 proteins in infected Pacific oyster, Crassostrea gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Martenot, Claire; Segarra, Amelie; Baillon, Laury; Faury, Nicole; Houssin, Maryline; Renault, Tristan.
Immunohistochemistry (IHC) assays were conducted on paraffin sections from experimentally infected spat and unchallenged spat produced in hatchery to determine the tissue distribution of three viral proteins within the Pacific oyster, Crassostrea gigas. Polyclonal antibodies were produced from recombinant proteins corresponding to two putative membrane proteins and one putative apoptosis inhibitor encoded by ORF 25, 72, and 87, respectively. Results were then compared to those obtained by in situ hybridization performed on the same individuals, and showed a substantial agreement according to Landis and Koch numeric scale. Positive signals were mainly observed in connective tissue of gills, mantle, adductor muscle, heart, digestive gland, labial palps, and...
Tipo: Text
Palavras-chave: OsHV-1; Viral proteins; Crassostrea gigas.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00326/43697/43124.pdf

Etat des principaux stocks de poissons démersaux et de langoustine exploités par la France en 1992 dans le Nord-Est Atlantique.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mellon, Capucine; Charuau, Anatole; Tetard, Alain.
Fisheries are managed by stocks. A stock is defined by species and geographical area. Their management is international including all the countries which have a fishing activity in each geographical area. The International Council for Exploration of the Sea (ICES) is an international structure which undertakes to organize working groups each year. The groups are made up of scientists from different countries. Those experts are put in charge of assessing the most important stocks. The main results of these assessments are described in that report. The most important French and international landings of demersal fishes and nephrops in North-Eastern Atlantic are presented in the introduction of the report. The species are cod, whiting, saithe, haddock, sole,...
Tipo: Text
Palavras-chave: Atlantique Nord-Est; Gestion des stocks; Espèces démersales exploitées; Poissons démersaux; Langoustine; Distribution géographique; Nord-East Atlantic; Stock assessment; Exploited demersal species; Demersal fishes; Nephrops; Geographical distribution.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00110/22145/19785.pdf

Locations and mechanisms of ocean ventilation in the high-latitude North Atlantic in an eddy-permitting ocean model
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Macgilchrist, Graeme A.; Johnson, Helen L.; Marshall, David P.; Lique, Camille; Thomas, Matthew; Jackson, Laura C.; Wood, Richard A.
A substantial fraction of the deep ocean is ventilated in the high-latitude North Atlantic. Consequently, the region plays a crucial role in transient climate change through the uptake of carbon dioxide and heat. However, owing to the Lagrangian nature of the process, many aspects of deep Atlantic Ocean ventilation and its representation in climate simulations remain obscure. We investigate the nature of ventilation in the high latitude North Atlantic in an eddy-permitting numerical ocean circulation model using a comprehensive set of Lagrangian trajectory experiments. Backwards-in-time trajectories from a model-defined ‘North Atlantic DeepWater’ (NADW) reveal the locations of subduction from the surface mixed layer at high spatial resolution. The major...
Tipo: Text
Palavras-chave: North Atlantic Ocean; Atmosphere-ocean interaction; Lagrangian circulation/transport; Ocean circulation; Boundary currents; Diapycnal mixing.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00646/75833/76825.pdf

The Verge of Curling: Numerical and Experimental Comparison of Spinnaker Aerodynamics.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Augier, Benoit; Paillard, Benoît; Sacher, Matthieu; Leroux, Jean-baptiste; Aubin, Nicolas.
The “verge of curling” recommendation is one of the common advice that sailors follow for efficient sailing downwind with a spinnaker. Wind tunnel experiments on spinnaker models conducted by [Aubin et al., 2017] in the Twisted Flow Wind Tunnel of the Yacht Research Unit of the University of Auckland have shown that curling can be related to better performance at Apparent Wind Angle ≥ 100°. In the present article, we will focus on the aerodynamic performance jump observed at Apparent Wind Angle AWA = 100°, where the drive force increases up to 15% when the sail starts to flap. Thanks to four triggered HD cameras and coded targets stuck on the sail, three flying shapes of the spinnaker are reconstructed by photogrammetry for different sheet lengths from...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00663/77521/79318.pdf

CNEXO - Rapport annuel 1976
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
En 1976, conformément à l'évolution générale du droit de la mer d'une part, et d'autre part à la résolution du Conseil réuni à la Have le 3 novembre 1976 qui constata l'accord des 9 États membres de la Communauté Economique Européenne pour créer à partir du 1er Janvier 1977 une zone de pêche communautaire de 200 milles au large des côtes de la mer du Nord et de l'Atlantique, la France s'est donnée les moyens législatifs de créer une zone économique de 200 milles au large de ses côtes. [OCR NON CONTRÔLE]
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1976
URL: http://archimer.ifremer.fr/doc/1976/rapport-4820.PDF

Spatial comparison of total vs. active bacterial populations by coupling genetic fingerprinting and clone library analyses in the NW Mediterranean Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rodriguez-blanco, Arturo; Ghiglione, Jean-francois; Catala, Philippe; Casamayor, Emilio O.; Lebaron, Philippe.
Spatial distributions of both total (i.e. 16S rDNA-based fingerprints) and active (i.e. 16S rRNA-based fingerprints) bacterial populations, together with total bacterial activity measured by (3)H-leucine incorporation, were studied along a 98 km transect in the NW Mediterranean Sea. Capillary electrophoresis-single strand conformation polymorphism (CE-SSCP) fingerprinting was coupled to a clone library, allowing CE-SSCP peaks identification and the monitoring of the spatial variation of bacterial phylotypes. Up to 80% of the community peaks matched those obtained from clone library sequences, accounting for 86.7% of the total fingerprinting area. A good agreement was found between the relative abundance of Prochlorococcus in the CE-SSCP fingerprints and...
Tipo: Text
Palavras-chave: CE-SSCP fingerprinting; 16S rRNA; Spatial distribution; Bacterial diversity and activity Prochlorococcus; SAR11; Gammaproteobacteria.
Ano: 2009
URL: https://archimer.ifremer.fr/doc/00243/35433/33965.pdf

Effets de l'exploitation par la pêche sur la dynamique de diversité des peuplements de poissons démersaux : analyse comparée du rôle des interactions entre espèces dans le golfe de Gascogne et dans le golfe du Lion
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Blanchard, Fabian.
This work deals with the fishing effects on the diversity dynamics of demersal fish communities, focusing on the biotic interactions. Multispecies indices are used in order to characterize the demersal fish community dynamics of the Bay of Biscay and of the Gulf of Lions. These are the diversity indices, the temporal variability of the total biomass and of the slope of the number size spectra and the slope of the species-area curves (spatial segregation). The yearly bottom trawl surveys EVHOE, CHALIST and MEDITS, carried out in these two areas since 1983 by IFREMER for the stocks assessment provide the data. The differences between areas are related to a fishing index (mean value of the annual landings of demersal fish per surface area). Other areas are...
Tipo: Text
Palavras-chave: Gulf of Lions; Bay of Biscay; Medits; Chalist; Evhoe; Fishing effect; Diversity; Demersal fish; Golfe du Lion; Golge de Gascogne; Medits; Chalist; Evhoe; Descripteurs; Diversité des peuplements; Poissons démersaux.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/these-6670.pdf

Possibilities to prevent Crassostrea gigas oyster summer mortality in France
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Samain, Jean-francois; Ropert, Michel; Bedier, Edouard; Soletchnik, Patrick; Mazurie, Joseph; Le Coz, Florence; Blin, Jean-louis; Mille, Dominique; Pajot, Régis; Haffray, Patrick; Bacher, Cedric; Grangere, Karine; Grangere, Karine; Pouvreau, Stephane; Bourles, Yves; Gohin, Francis; Woerther, Patrice; Boudry, Pierre.
Summer mortality has been reported in the Pacific oyster, Crassostrea gigas, for many years in Japan, US and Europe. It affects both adults and juveniles and the causes of this phenomenon are complex. Environmental, physiological or pathological putative causes were studied all over the world. Recently, the MOREST project ((MORtalitEStivale) a multidisciplinary project (2001-2005) focused on his problem led to a better understanding of this phenomenon in France. The results showed in these geographical conditions, the main interactions between the oysters, their environment and certain pathogens.
Tipo: Text
Palavras-chave: Interaction model; Environmental parameters; Summer mortality; Crassostrea gigas; Pacific oyster.
Ano: 2006
URL: https://archimer.ifremer.fr/doc/2006/acte-3476.pdf

Interim Report of the Working Group on the Effects of Extraction of Marine Sediments on the Marine Ecosystem (WGEXT). 16-19 April 2018 Copenhagen, Denmark
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ICES.
The Working Group on the Effects of Extraction of Marine Sediments on the Marine Eco-system (WGEXT) met in Copenhagen, Denmark, 16–19 April 2018. Twelve participants from ten ICES member countries attended the meeting. Contributions were provided by correspondence from three countries whose representative were not able to attend. The objective of WGEXT is to provide a summary of data on marine sediment extraction (ToR A1), marine resource and habitat mapping, changes to the legal regime, and re-search projects relevant to the assessment of environmental effects (ToR A2). The data on marine sediment extraction will be reported annually. Data reports (ToR A1) were discussed from 14 (out of 20) member countries. Although not all the member countries provided...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00479/59089/61727.pdf

Synthèse des réponses du groupe d’experts sur le modèle de données du référentiel portuaire du SIMM
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rabevolo, Clemence.
De mars à mai 2020, l’équipe du SAR a sollicité plusieurs acteurs, sélectionnés pour leur expertise sur la thématique des données portuaires, afin de collecter leurs avis sur le contenu du référentiel portuaire du SIMM. Les échanges ont été menés par mail, téléphone et visio-conférence. Le présent document synthétise les réponses reçues, tout en gardant en perspective les moyens humains et techniques du SAR, afin de proposer un projet de modèle de données faisant consensus.
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00685/79748/82524.pdf

Carbonate system properties and anthropogenic carbon inventory in the Algerian Basin during SOMBA cruise (2014): Acidification estimate
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Keraghel, Mehdia Asma; Louanchi, Ferial; Zerrouki, Mohamed; Kaci, Malik Ait; Aït-ameur, Nadira; Labaste, Matthieu; Legoff, Hervé; Taillandier, Vincent; Harid, Romaissa; Mortier, Laurent.
Recent studies have provided a better understanding of carbonate system parameters and their spatial and temporal variability in several areas of the Mediterranean Sea. This study uses a new dataset that covered the entire Algerian Basin during the summer of 2014 (SOMBA cruise) to describe the distribution of carbonate system parameters. The findings show that almost the entire basin was a source of CO2 to the atmosphere during the studied period. Besides the well-known TrOCA (Tracer combining Oxygen, Carbon and total Alkalinity) approach, the study proposes new parametrization for the standard back calculation method to assess the anthropogenic carbon concentration. The results of both approaches yield similar distributions and concentration ranges...
Tipo: Text
Palavras-chave: Algerian Basin; Carbonate system; Anthropogenic carbon inventory; Acidification; Mesoscale activity.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00615/72729/71829.pdf

Trend analysis of indicators: a comparison of recent changes in the status of marine ecosystems around the world
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Blanchard, Julia L.; Coll, Marta; Trenkel, Verena; Vergnon, Remi; Yemane, Dawit; Jouffre, Didier; Link, Jason S.; Shin, Yunne-jai.
Time-series of ecological and exploitation indicators collected from 19 ecosystems were analysed to investigate whether there have been temporal trends in the status of fish communities. Using linear and non-linear statistical methods, trends are reported for six indicators (mean length of fish in the community, mean lifespan, proportion of predatory fish, total biomass of surveyed species, mean trophic level of landings, and inverse fishing pressure), and the redundancy of these indicators across ecosystems is evaluated. The expected direction of change for an ecosystem that is increasingly impacted by fishing is a decline in all indicators. A mixture of negative and positive directions of change is recorded, both within and among all ecosystems...
Tipo: Text
Palavras-chave: Community; Ecological indicators; Ecosystem-based fisheries management; Ecosystem effects of fishing; Natural resource management.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00002/11373/8166.pdf

Modelling larval dispersal and settlement of the reef-building polychaete Sabellaria alveolata: Role of hydroclimatic processes on the sustainability of biogenic reefs
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ayata, Sakina-dorothee; Ellien, Celine; Dumas, Franck; Dubois, Stanislas; Thiebaut, Eric.
The honeycomb worm Sabellaria alveolata forms biogenic reefs which constitute diversity hotspots on tidal flats. The largest known reefs in Europe, located in the Bay of Mont-Saint-Michel (English Channel), are suffering increasing anthropogenic disturbances which raise the question of their sustainability. As the ability to recover depends partly on the recolonization of damaged reefs by larval supply, evaluating larval dispersal and the connectivity between distant reefs is a major challenge for their conservation. In the present study, we used a 3D biophysical model to simulate larval dispersal under realistic hydroclimatic conditions and estimate larval retention and exchanges among the two reefs of different sizes within the bay. The model takes into...
Tipo: Text
Palavras-chave: Bay of Mont Saint Michel; English Channel; Modelling; Larval settlement; Larval transport; Connectivity; Biogenic reefs; Sabellaria alveolata.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6841.pdf

Very High Resolution 3D seismic: a new imaging tool for sub-bottom profiling
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Marsset, Tania; Marsset, Bruno; Thomas, Yannick; Didailler, Stephane.
This note presents the first results of the development of a 3D Very High Resolution seismic method. Particular attention was paid to the design of an operational system to be in agreement with the expected goals in term of acquisition and processing. A set of three examples, collected in various geological environments, is presented.
Tipo: Text
Palavras-chave: Imagery; 3D; VHR; Seismic; Imagerie; 3D; THR; Sismique.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/publication-495.pdf

Ecophysiologie de l'huître creuse Crassostrea gigas (Thunberg) en milieu naturel. Rôle des populations d'une lagune méditerranéenne dans les transferts des matières particulaire et dissoute.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Outin, Virginie.
L'écophysiologie de l'huître creuse C. gigas cultivée dans le bassin de Thau a été étudiée en tenant compte des sources nutritives particulaire et dissoute pendant les principales phases du cycle biologique. Conçu pour cette étude dans les conditions naturelles, le dispositif expérimental en circuit ouvert à flux constant permet les mesures simultanées des différents paramètres. Les huîtres ont des activités plus faibles dans leur environnement que dans les expériences en milieu artificiel. L'intensité de leurs activités augmente avec la température et la matière organique particulaire disponible, elle diminue avec le poids des huîtres et varie en fonction de l'état physiologique. La matière particulaire est insuffisante, et pour répondre à leurs besoins,...
Tipo: Text
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00089/20004/17665.pdf

Filets à Rougets. Occitanie. 2018. Observation des Marées au débarquement - OBSDEB
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public. Ces indicateurs intègrent...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00596/70855/69088.pdf

Demande d’expertise sur la qualité microbiologique des coques de la zone 2956.08.100
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boulben, Sylviane; Le Bec, Claude.
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00623/73518/79623.pdf

Resource partitioning within a tropical seabird community: new information from stable isotopes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cherel, Y; Le Corre, M; Jaquemet, S; Menard, Frederic; Richard, Pierre; Weimerskirch, H.
Characteristics of the tropical oceanic environment (low productivity, little seasonality) and poor diversity of tropical seabird foraging methods and prey relative to temperate and polar species suggest that tropical seabirds overall encompass a narrow range of isotopic niches, with large overlaps among species. To test this hypothesis, we examined the stable carbon (delta C-13) and nitrogen (delta N-15) isotopic composition of blood and feathers of 5 seabird species from Europa Island, Mozambique Channel. While differences were small, blood delta C-13 and delta N-15 values characterized 5 distinct and non-overlapping trophic niches during the breeding period. Seabirds used 2 distinct foraging areas (delta C-13), one used by sooty tern Sterna fuscata and...
Tipo: Text
Palavras-chave: Trophic segregation; Tuna; Sooty tern; Pelagic ecosystem; Frigatebird; Booby.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4675.pdf

L'utilisation de modèles écologiques dans la lutte contre l'eutrophisation des eaux côtières françaises
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Menesguen, Alain.
Increasing anthropogenic nitrogen and phosphorus loadings in some coastal areas have induced during the last twenty years excessive production of algal material, either phytoplanktonic or macrophytic. This so-called eutrophication phenomenon alters the usual structure of ecosystem and can lead to massive kills caused by anoxia in some extreme cases, when almost all the dissolved oxygen in bottom waters has been consumed by organic matter decomposition. Just behind the semi-enclosed lagoons, the most sensible areas are the dilution plumes of main rivers. In the case of French coasts, mediterranean lagoons have been eutrophicated for a long time, whereas the coastal areas of the Bay of Biscay and English Channel have been partially preserved by the strong...
Tipo: Text
Palavras-chave: Ecological models; Hydrodynamical models; Residence time; Limiting factor; Phytoplankton blooms; Green tides; Coastal eutrophication; Modèles écologiques; Modèles hydrodynamiques; Temps de résidence; Elément limitant; Eau colorée; Marée verte; Eutrophisation côtière.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/rapport-144.pdf

Salty anomalies forced by Tehuantepec and Papagayo gap winds: Aquarius observations
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Grodsky, Semyon A.; Carton, James A.; Bentamy, Abderrahim.
In the presence of stable near-surface haline stratification, intermittent cold sea surface temperature (SST, upwelling) events produced by gap winds off the Central American Pacific coast should be accompanied by uplifts of saltier water. We illustrate that Aquarius satellite sea surface salinity (SSS) captures these high SSS events. In boreal winter when the intense gap winds are frequent, two tongues of anomalously salty water develop off the Gulfs of Tehuantepec and Papagayo. During that season the average SSS in the meridionally oriented Tehuantepec tongue is about 0.4 psu saltier than the background SSS. The zonally elongated Papagayo tongue stands out even more strongly, being 1-2 psu saltier than SSS in the neighbouring Panama Bight. The spatial...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00211/32184/30751.pdf

Note on vertical distribution of plutonium and americium in the mediterranean sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fukai, R; Holm, E; Ballestra, S.
Tipo: Text
Ano: 1979
URL: http://archimer.ifremer.fr/doc/00122/23323/21146.pdf

Seasonal to hour variation scales in abundance and production of total and particle-attached bacteria in the open NW Mediterranean Sea (0-1000 m)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mevel, G.; Vernet, M.; Goutx, M.; Ghiglione, J. F.
We present the vertical and temporal dynamics of total vs. particle-attached bacterial abundance and activity over a 5 week period under summer to autumn transition in NW Mediterranean Sea. At a weekly time scale, total bacterial biomass and production in the euphotic layers was significantly correlated with phytoplanktonic biomass. At an hourly time scale, total bacterial biomass responded very rapidly to chlorophyll a fluctuations, suggesting a tight coupling between phytoplankton and bacteria for resource partitioning during the summer-autumn transition. In contrast, no influence of diel changes on bacterial parameters was detected. Episodic events such as coastal water intrusions had a significant positive effect on total bacterial abundance and...
Tipo: Text
Palavras-chave: Nucleic acid content; Free living bacteria; Top down control; Flow cytometry; Atlantic ocean; Water column; Spring bloom; Bottom up; North sea; Biogeochemical signifiance.
Ano: 2008
URL: https://archimer.ifremer.fr/doc/00208/31973/30408.pdf

Dynamics of benthic metabolism, O2, and pCO2 in a temperate seagrass meadow
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Berg, Peter; Delgard, Marie Lise; Polsenaere, Pierre; Mcglathery, Karen J.; Doney, Scott C.; Berger, Amelie C.
Seagrass meadows play an important role in “blue carbon” sequestration and storage, but their dynamic metabolism is not fully understood. In a dense Zostera marina meadow, we measured benthic O2 fluxes by aquatic eddy covariance, water column concentrations of O2, and partial pressures of CO2 (pCO2) over 21 full days during peak growing season in April and June. Seagrass metabolism, derived from the O2 flux, varied markedly between the 2 months as biomass accumulated and water temperature increased from 16°C to 28°C, triggering a twofold increase in respiration and a trophic shift of the seagrass meadow from being a carbon sink to a carbon source. Seagrass metabolism was the major driver of diurnal fluctuations in water column O2 concentration and pCO2,...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00504/61565/65490.pdf

Daily variations of the saccular endolymph and plasma compositions in the turbot Psetta maxima: relationship with the diurnal rhythm in otolith formation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Edeyer, Anaick; De Pontual, Helene; Payan, P; Troadec, Herve; Severe, Armelle; Mayer-gostan, N.
We studied the circadian variations of the ionic composition ([Na+], [K+], [Cl-]), total CO2 ([tot CO2]), and protein concentration ([protein]) in the plasma and endolymph in the distal and proximal sides of the sacculus in the turbot Psetta maxima. Daily variations in total plasma calcium ([tot Ga]) were also recorded. Significant diurnal fluctuations occurred in most parameters and the spatial heterogeneity of the endolymph composition was maintained throughout a 24 h period. The main parameters implicated in otolith calcification, endolymph [tot CO2] and endolymph [protein], fluctuated diurnally, [tot CO2] was highest and [protein] lowest at night; the relative concentrations were reversed during the day. The inverse, alternating relationship of maximal...
Tipo: Text
Palavras-chave: Daily cycle; Endolymph; Otolith; Chemical composition; Teleost.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00000/10572/7603.pdf

Investigation of anthropogenic and natural organic inputs in estuarine sediments using hydrocarbon markers (nah, lab, pah)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bouloubassi, I; Saliot, A.
Surface sediments were collected in the Rhone delta, NW Mediterranean, at two seasons and analyzed for composition of non-aromatic hydrocarbons (NAH), long-chain linear alkylbenzenes (LAB) and polycyclic aromatic hydrocarbons (PAH) by GC and GC/MS following fractionation by normal phase HPLC. Concentrations varied from 21.2 to 166.7 mu/g for NAH, from 2097.9 to 9324.2 ng/g for total PAH and from 342.5 to 2713.0 ng/g for LAB. These levels are comparable to those reported for other coastal areas worldwide in the vicinity of important urban and industrial activities. Detailed analysis permitted identification of several contributions to the bulk sedimentary hydrocarbon mixture from fossil fuel related sources, pyrolytic processes, domestic wastes as well as...
Tipo: Text
Palavras-chave: ANTHROPOGENIC NATURAL INPUTS; ESTUARY; HYDROCARBONS; MEDITERRANEAN; SEDIMENTS.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00099/21043/18669.pdf

Neotectonics of the Owen Fracture Zone (NW Indian Ocean): Structural evolution of an oceanic strike-slip plate boundary
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rodriguez, M.; Fournier, M.; Chamot-rooke, Nicolas; Huchon, P.; Bourget, Julien; Sorbier, M.; Zaragosi, S.; Rabaute, A.
The Owen Fracture Zone is a 800 km-long fault system that accommodates the dextral strike-slip motion between India and Arabia plates. Because of slow pelagic sedimentation rates that preserve the seafloor expression of the fault since the Early Pliocene, the fault is clearly observed on bathymetric data. It is made up of a series of fault segments separated by releasing and restraining bends, including a major pull-apart basin at latitude 20 degrees N. Some distal turbiditic channels from the Indus deep-sea fan overlap the fault system and are disturbed by its activity, thus providing landmarks to date successive stages of fault activity and structural evolution of the Owen Fracture Zone from Pliocene to Present. We determine the durability of relay...
Tipo: Text
Palavras-chave: Indian Ocean; Owen Fracture Zone; Pull-apart; Transform fault.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00133/24426/22435.pdf

The penultimate deglaciation: protocol for PMIP4 transient numerical simulations between 140 and 127 ka
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Menviel, Laurie; Capron, Emilie; Govin, Aline; Dutton, Andrea; Tarasov, Lev; Abe-ouchi, Ayako; Drysdale, Russell; Gibbard, Philip; Gregoire, Lauren; He, Feng; Ivanovic, Ruza; Kageyama, Masa; Kawamura, Kenji; Landais, Amaelle; Otto-bliesner, Bette L.; Oyabu, Ikumi; Tzedakis, Polychronis; Wolff, Eric; Zhang, Xu.
The penultimate deglaciation (~ 138–128 thousand years before present, hereafter ka) is the transition from the penultimate glacial maximum to the Last Interglacial (LIG, ~ 129–116 ka). The LIG stands out as one of the warmest interglacials of the last 800 ka, with high-latitude temperature warmer than today and global sea level likely higher by at least 6 meters. The LIG therefore receives ever-growing attention, in particular to identify mechanisms and feedbacks responsible for such regional warmth that is comparable to that expected before 2100. Considering the transient nature of the Earth system, the LIG climate and ice-sheets evolution were certainly influenced by the changes occurring during the penultimate deglaciation. It is thus important to...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00491/60241/63638.pdf

Qualité du Milieu Marin Littoral 2017. Bulletin de la surveillance 2017. Laboratoire Environnement Ressources du Morbihan/Pays de Loire. Départements de la Loire-Atlantique et de Vendée nord
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cochennec-laureau, Nathalie; Bizzozero, Lucie; Bonneau, Francoise; Collin, Karine; Fortune, Mireille; Le Merrer, Yoann; Pierre-duplessix, Olivier; Schapira, Mathilde; Schmitt, Anne; Souchu, Philippe.
Suivi hydrologique L’année 2017 s’est caractérisée par des températures élevées et un déficit en précipitation sur le bassin versant de la Loire, ce qui la classe parmi les années sèches exceptionnelles avec les années 2003, 2011 et 2015. Les débits de la Loire ont été largement déficitaires. L’ensoleillement soutenu en début d’année et en automne a été toutefois plus faible sur les mois de juillet et septembre. Suivi microbiologique Parmi les 41 stations de surveillance, 9 ont présenté une bonne qualité microbiologique, 31 une qualité moyenne, et une seule station est de mauvaise qualité. Comparativement à l'année 2016, le nombre de stations présentant une tendance à l'amélioration est en augmentation : 4 stations présentent une tendance à l'amélioration...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00461/57312/59406.pdf

Filets à Crustacés. Méditerranée (Hors Corse). 2017. Observation des Marées au débarquement - OBSDEB
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public. Ces indicateurs intègrent...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00596/70764/68996.pdf

The oceanic sink for anthropogenic CO2 from 1994 to 2007
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gruber, Nicolas; Clement, Dominic; Carter, Brendan R.; Feely, Richard A.; Van Heuven, Steven; Hoppema, Mario; Ishii, Masao; Key, Robert M.; Kozyr, Alex; Lauvset, Siv K.; Lo Monaco, Claire; Mathis, Jeremy T.; Murata, Akihiko; Olsen, Are; Perez, Fiz F.; Sabine, Christopher L.; Tanhua, Toste; Wanninkhof, Rik.
We quantify the oceanic sink for anthropogenic carbon dioxide (CO2) over the period 1994 to 2007 by using observations from the global repeat hydrography program and contrasting them to observations from the 1990s. Using a linear regression-based method, we find a global increase in the anthropogenic CO2 inventory of 34 +/- 4 petagrams of carbon (Pg C) between 1994 and 2007. This is equivalent to an average uptake rate of 2.6 +/- 0.3 Pg C year-1 and represents 31 +/- 4% of the global anthropogenic CO2 emissions over this period. Although this global ocean sink estimate is consistent with the expectation of the ocean uptake having increased in proportion to the rise in atmospheric CO2, substantial regional differences in storage rate are found, likely owing...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00675/78673/80896.pdf

A flow-through rearing system for ecophysiological studies of Pacific oyster Crassostrea gigas larvae
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rico Villa, Benjamin; Woerther, Patrice; Mingant, Christian; Le Piver, David; Pouvreau, Stephane; Hamon, Michel; Robert, Rene.
While literature is relatively abundant on adult shellfish, ecophysiological studies at the larval stage are scarce because of both technical difficulties and inadequate methodology. A tool dedicated to provide basic information for larval ecophysiology was accordingly developed. Two steps were followed: first a flow-through method of Crassostrea gigas larval culture was perfected during a set of experiments in which rearing systems and larval density were assessed. Then a continuous hydrobiological data recorder was adapted with modifications to comply with our experimental aim. SILO (Système d'Instrumentation des Larves en flux Ouvert) allowed the successive acquisition of hydrobiological parameters in ten 150 l larval tanks in which larvae were reared...
Tipo: Text
Palavras-chave: Temperature; Ecophysiology; Bivalve larvae; Crassostrea gigas; Flow through.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4167.pdf

Report of the Benchmark Workshop on Pelagic Stocks (WKPELA 2018). 12–16 February 2018 ICES HQ, Copenhagen, Denmark
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ICES.
Tipo: Text
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00444/55562/57167.pdf

Report of the Working Group on the Assessment of Southern Shelf Stocks of Hake, Monk and Megrim (WGHMM). 10 - 16 May 2013. ICES Headquarters, Copenhagen
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ICES.
The ICES Working Group on the Assessment of Southern Shelf Stocks of Hake, Monk and Megrim (WGHMM) met in ICES Headquarters during May 10-16 2013. There were 24 stocks in its remit distributed from ICES Divisions IIIa to IXa though mostly distributed in Sub Areas VII, VIII and IX. There were 17 participants (of whom 2 participated part time and 2 by correspondence). The group was tasked with carrying out stock assessments and catch forecasts and providing a first draft of the ICES advice for 2013 for 11 stocks. Several stocks, nine functional units for Nephrops and some of the new stocks from last year’s WG were listed as “biennial 2nd year”. For those stocks, catch and abundance indices information was updated. In addition, three new stocks were also...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00165/27664/25840.pdf

Effects of light and nitrogen availability on photosynthetic efficiency and fatty acid content of three original benthic diatom strains
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cointet, Eva; Wielgosz-collin, Gaëtane; Bougaran, Gael; Rabesaotra, Vony; Gonçalves, Olivier; Méléder, Vona.
Microalgal biotechnology has gained considerable importance in recent decades. Applications range from simple biomass production for food and animal feed to valuable products for fuel, pharmaceuticals, health, biomolecules and materials relevant to nanotechnology. There are few reports of the exploration of wider microalgae biodiversity in the literature on high value microalgal compounds, however, because it is believed that there is little to be gained in terms of biomass productivity by examining new strains. Still, without diversity, innovation in biotechnology applications is currently limited. Using microalgal diversity is a very promising way to match species and processes for a specific biotechnological application. In this context, three benthic...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00591/70269/68328.pdf

Are food web structures well represented in isotopic spaces?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Jabot, Franck; Giraldo, Carolina; Lefebvre, Sebastien; Dubois, Stanislas.
Isotopic analyses are increasingly used to assess the structure of food webs and a series of isotopic functional indices have been proposed in the last decade to characterize this structure. These indices are based on the foundational assumption that proximity in the isotopic space informs on trophic similarity between species. While it has been recognized for long that this simplifying assumption should be used with caution, no formal evaluation of its domain of validity has been performed to date. We here simulate a large number (15,000) of food webs with varying characteristics to assess i) whether isotopic distance is a good proxy of trophic dissimilarity; ii) whether isotopic functional indices are good proxies of trophic functional properties; and...
Tipo: Text
Palavras-chave: Connectance; Isotopic functional indices; Niche model; Omnivory; Virtual ecology.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00385/49596/50110.pdf

Analyse de dispositifs technologiques permettant de diminuer les captures de cabillaud par des chalutiers ciblant les espèces démersales
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Larnaud, Pascal.
Ce travail vise à identifier des dispositifs techniques ayant fait l’objet de tests et permettant de diminuer les captures de cabillaud par des chalutiers ciblant les espèces démersales, en fonction des données bibliographiques ou de résultats d’études. Il repose essentiellement sur la constitution du tableau joint en annexe. Les études sur la « Raised Fishing Line » (Krag et al., 2010; McHugh et al., 2019, 2017) sont intégrées dans le tableau mais ne sont pas analysées ici puisqu’elles font l’objet d’une analyse détaillée séparée. Ce tableau synthétise en particulier les informations disponibles sur les performances des dispositifs identifiés sur la réduction des captures de cabillaud, de merlan, et sur les captures d’espèces commerciales suivantes :...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00614/72584/71563.pdf

Examen des prises accessoires de la pêcherie de crevettes peneides du plateau continental de la Guyane française
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lemoine, Michel; Vendeville, Philippe; Ladurelle, Christophe.
At this moment, the quasi-totality of the catches of the 95 licensed or French trawlers fishing on the shelf of French Guyana is thrown overboard, except for shrimps. This waste, which has been going on for 20 years in French Guyana, is the consequence a very specific production system which has just been the focus of a study by some French scientists who assessed it and tried to provide some solutions. It appears that the use of these neglected resources can be made at three different levels: 1) by making the boats keep the totality of the species they already partially keep, 2) by making them keep a series of complementary species which can be sold directly as raw fish products, 3) by collecting the leftovers for the making of sub-products or flour.
Tipo: Text
Ano: 1982
URL: http://archimer.ifremer.fr/doc/1982/publication-6699.pdf

Lagrangian water mass tracing from pseudo-Argo, model-derived salinity, tracer and velocity data: An application to Antarctic Intermediate Water in the South Atlantic Ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Blanke, Bruno; Speich, Sabrina; Rusciano, Emanuela.
We use the tracer and velocity fields of a climatological ocean model to investigate the ability of Argo-like data to estimate accurately water mass movements and transformations, in the style of analyses commonly applied to the output of ocean general circulation model. To this end, we introduce an algorithm for the reconstruction of a fully non-divergent three-dimensional velocity field from the simple knowledge of the model vertical density profiles and 1000-m horizontal velocity components. The validation of the technique consists in comparing the resulting pathways for Antarctic Intermediate Water in the South Atlantic Ocean to equivalent reference results based on the full model information available for velocity and tracers. We show that the...
Tipo: Text
Palavras-chave: Ocean circulation; Conservation equations; Mathematical models; Density field; Subsurface drifters; Intermediate water masses.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00238/34910/33597.pdf

Seasonal dynamics of sea surface salinity off Panama: The Far Eastern Pacific fresh pool
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Alory, Gael; Maes, Christophe; Delcroix, Thierry; Reul, Nicolas; Illig, Serena.
The freshest surface waters in the tropical Pacific are found at its eastern boundary. Using in situ observations, we depict the quasi-permanent presence of a far eastern Pacific fresh pool with Sea Surface Salinity (SSS) lower than 33, which is confined between Panama's west coast and 85W in December and extends westward to 95W in April. Strong SSS fronts are found at the outer edge of this fresh pool. We investigate the seasonal dynamics of the fresh pool using complementary satellite wind, rain, sea level and in situ oceanic current data at the surface, along with hydrographic profiles. The fresh pool appears off Panama due to the strong summer rains associated with the northward migration of the ITCZ over Central America in June. During the second half...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00072/18311/16581.pdf

Marine turtle interaction with purse-seine fishery in the Atlantic and Indian oceans: Lessons for management
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bourjea, Jerome; Clermont, Sandra; Delgado, Alicia; Murua, Hilario; Ruiz, Jon; Ciccione, Stephane; Chavance, Pierre.
Bycatch of endangered marine turtles is a growing issue for the management of all fisheries, including the oceanic purse-seine fishery. The aim of this study was to assess the spatial and temporal variation in bycatch rates of these species in the entire European purse-seine fishery operating in the Atlantic and Indian oceans. The study was based on data collected through observer programs from 1995 to 2011. During that period, a total of 15 913 fishing sets were observed, including 6 515 on Drifting Fish Aggregating Devices (DFADs) and 9 398 on free swimming schools, representing a global coverage of 10.3% and 5.1% of the total fishing activity in the Atlantic and Indian Ocean, respectively. Moreover, from 2003 to 2011, 14 124 specific observations were...
Tipo: Text
Palavras-chave: Bycatch; Marine turtle; Fishery impacts; Fishery management; Atlantic Ocean; Indian Ocean.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00206/31760/30632.pdf

Response of sedimentary processes to cyanobacteria loading
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Zilius, Mindaugas; De Wit, Rutger; Bartoli, Marco.
Sedimentation of pelagic cyanobacteria in dystrophic freshwater and oligohaline lagoons results in large inputs of labile organic matter (OM) to the benthos. We used an experimental approach to study the short-term impact of such phenomena on the benthic microbial community metabolism and on the nitrogen (N) fluxes across the sediment-water interface. We hypothesized an increase of respiratory activity, including N loss via denitrification and its recycling to the water column. Our results show that the incorporation within sediments of the settled bloom increases benthic bacterial activities. This is coupled to large DON and NH4+ effluxes, and to a comparatively smaller increase of N-2 production, while no significant effects were detected for the benthic...
Tipo: Text
Palavras-chave: Cyanobacteria; Organic matter; Sediments; Benthic metabolism; DON; Denitrification.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00354/46504/74457.pdf

Estimation du Niveau d'Exploitation du Stock de Soles du Golfe de Gascogne en 1980.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guillou, Alain; Labastie, Jacques; Decamps, Philippe.
An assessment of the sommon sole stock in the Bay of Biscay is presented, based on Jones's cohort analysis method on length composition data (1974) according to a computer program set up by De Verdelhan (1980). The results show that for the present fishing pattern, Fmax is overpassed and that a reduction of fishing effort would be necessary to come back to it. Furthermore, an increase in mesh-size of trawlers without modifying the shrimp fishery would lead to only small long-term benefits (15% maximum): the effect of shrimp trawling on the whole sole fishery appears to be very important.
Tipo: Text
Palavras-chave: Solea solea Length weight relationships Size distribution Fishing effort Catch statistics; Stock assessment Fishery management.
Ano: 1980
URL: http://archimer.ifremer.fr/doc/1980/publication-1908.pdf

Global Interior Eddy Available Potential Energy Diagnosed from Argo Floats
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Roullet, Guillaume; Capet, Xavier; Maze, Guillaume.
By combining all Argo profiles for the period 2002 to present, a cumulative density function is constructed on a 3D grid of the global ocean. This function quantifies the statistics of isopycnals: time-averaged density, root- mean square (rms) of isopycnal displacement, and Eddy Available Potential Energy (EAPE). EAPE is the analogue of the eddy kinetic energy, but for the potential energy reservoir. Because it is essentially tied to the spatial struc- ture and magnitude of mesoscale activity, EAPE is an important quantity that should be useful to evaluate eddy resolving/permitting model turbu- lence and circulation. Among other striking features are the turbulent be- havior of Pacific and southern Atlantic Tsuchiya jets and subsurface EAPE maxima in some...
Tipo: Text
Palavras-chave: Argo floats; Eddy available potential energy; Interior turbulence.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00175/28579/26966.pdf

Nutriments et biomasse microalgale de l'interface eau-glace au large de Kuujjuarapik, Baie d'Hudson, Arctique Canadien
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Maestrini, S; Rochet, M; Legendre, L; Demers, S.
Nutrient analyses were done in melted ice, frazil and sea water of the upper part of the water column, where as major constitutive elements of micro-algae were analysed. Measurements of nutrient uptake were carried out with frazil algae incubated at -1.5 degree C in a field incubator. Differential-enrichment bioassays and mean N/P ratio (5.9) demonstrated that actual growth of the cultures was nutrient-limited. Nitrogen governed the algal yield when illumination and grazing allowed the microalgae to grow. It concluded that the epontic dynamics is not only controlled from above, by the seasonal (climatic) changes in light intensity as generally assumed, but also from below, by the short-term (hydrodynamic) events of vertical mixing that replenish the...
Tipo: Text
Palavras-chave: Nutritive value; Growth; Food absorption; Algae; Ice water interface; Biomass; Nutrients (mineral).
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-1533.pdf

Towards Comprehensive Observing and Modeling Systems for Monitoring and Predicting Regional to Coastal Sea Level
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ponte, Rui M.; Carson, Mark; Cirano, Mauro; Domingues, Catia M.; Jevrejeva, Svetlana; Marcos, Marta; Mitchum, Gary; Van De Wal, R. S. W.; Woodworth, Philip L.; Ablain, Michaël; Ardhuin, Fabrice; Ballu, Valérie; Becker, Mélanie; Benveniste, Jérôme; Birol, Florence; Bradshaw, Elizabeth; Cazenave, Anny; De Mey-frémaux, P.; Durand, Fabien; Ezer, Tal; Fu, Lee-lueng; Fukumori, Ichiro; Gordon, Kathy; Gravelle, Médéric; Griffies, Stephen M.; Han, Weiqing; Hibbert, Angela; Hughes, Chris W.; Idier, Déborah; Kourafalou, Villy H.; Little, Christopher M.; Matthews, Andrew; Melet, Angélique; Merrifield, Mark; Meyssignac, Benoit; Minobe, Shoshiro; Penduff, Thierry; Picot, Nicolas; Piecuch, Christopher; Ray, Richard D.; Rickards, Lesley; Santamaría-gómez, Alvaro; Stammer, Detlef; Staneva, Joanna; Testut, Laurent; Thompson, Keith; Thompson, Philip; Vignudelli, Stefano; Williams, Joanne; Williams, Simon D. P.; Wöppelmann, Guy; Zanna, Laure; Zhang, Xuebin.
A major challenge for managing impacts and implementing effective mitigation measures and adaptation strategies for coastal zones affected by future sea level (SL) rise is our limited capacity to predict SL change at the coast on relevant spatial and temporal scales. Predicting coastal SL requires the ability to monitor and simulate a multitude of physical processes affecting SL, from local effects of wind waves and river runoff to remote influences of the large-scale ocean circulation on the coast. Here we assess our current understanding of the causes of coastal SL variability on monthly to multi-decadal timescales, including geodetic, oceanographic and atmospheric aspects of the problem, and review available observing systems informing on coastal SL. We...
Tipo: Text
Palavras-chave: Coastal sea level; Sea-level trends; Coastal ocean modeling; Coastal impacts; Coastal adaptation; Observational gaps; Integrated observing system.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00508/61958/66049.pdf

REMANTAS - Raman Exalté pour Milieux Aquatiques : une Nouvelle Technologie d’Analyse sur Site - ECOTECH 2011
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rinnert, Emmanuel; Berho, Catherine; Le Floch, Stephane; Vergnole, Sébastien; Lamy De La Chapelle, Marc; Toury, Timothée.
Le projet REMANTAS propose de développer un capteur pour rendre possible l’analyse de contaminants sur sites terrestres, côtiers ou maritimes. Les polluants ciblés, HAP, COV, BTEX, sont inscrits à la liste de la DCE ou font partie des substances candidates et/ou font partie des 100 substances les plus transportées par voie maritime. Ces trois familles de contaminants permettent de montrer l’adaptabilité du capteur en vue d’élargir le champ d’application de la technique d’analyse sur site. Les limites de détection visées sont du même ordre de grandeur que celles des techniques de référence.
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00101/21218/18833.pdf

Comparative genomics of closely related Thermococcus isolates, a genus of hyperthermophilic Archaea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Courtine, Damien.
The immense genomic diversity of microorganisms allows them to live everywhere, even in extreme environments such as deep hydrothermal vents. Scattered over the seabed, these are a good model for studying the biogeography and genomes diversification. A comparative genomics approach has been used on closely related isolates, of the genus Thermococcus. This work aimed at identifying mechanisms that have a role in the diversification of these genomes, and also to identify genes involved in this differentiation. For this purpose, two groups of about 20 isolates with different geographical origins were selected and sequenced.The geographical isolation resulting from colonization of new hydrothermal systems is likely to be a diversification and speciation factor...
Tipo: Text
Palavras-chave: Génomique comparative; Thermococcus; Diversification; Génome; Hyperthermophile; Comparative!genomics; Thermococcus; Diversification; Genome; Hyperthermophile.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00609/72141/70893.pdf

L'utilisation de sandwichs a materiaux composites
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Remen, W.
This paper is an overview of what has been done in the area of FRP-sandwich in the maritime industry over the last 15 years. The advantages of building in FRP-sandwich will be discussed with regards to past production methods and applications into other markets. Since the late sixties the development and use of light and strong construction materials and new construction methods has increased. The use of Fibre Reinforced Plastic (FRP)-sandwich has successfully been introduced to a variety of areas. Barracuda Technologies has over the years tried to fullfil customers' demands by developing new and better foam cores and adhesives and new improved production methods. The result of this is that we now supply Divinycell, a sandwich core, and Divilette, an...
Tipo: Text
Palavras-chave: Hovercraft; Ship technology; Composite materials; Navires anti mines; Embarcations commerciales rapides; Sandwich FRP Divinycell.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-1075.pdf

Evaluation 2020 du stock de vivaneau rouge en Guyane Française
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tagliarolo, Morgana.
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00678/78969/81372.pdf

Determination of diet in Manila clams by spatial analysis of stable isotopes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dang, C.; Sauriau, Pierre-guy; Savoye, N.; Caill-milly, Nathalie; Martinez, P.; Millaret, C.; Haure, Joel; De Montaudouin, X.
Spatial changes in the dietary regime of Ruditapes philippinarum from intertidal sediments of Arcachon Bay were depicted by analyzing stable isotope ratios in both its adductor muscles and potential trophic sources. Manila clams were collected from 50 sites in May to June 2006. Dietary reconstruction was based on the IsoSource mixing model, considering trophic enrichments of 3.5%. for carbon and 3.0%. for nitrogen, which were determined experimentally. delta C-13 and delta N-15 values, respectively, averaged -28.2 and 5.2 parts per thousand for riverine particulate organic matter (POM), -20.6 and 4.7 parts per thousand for inner bay phytoplankton, -21.0 and 5.6%. for outer bay phytoplankton, -16.8 and 4.8 parts per thousand. for microphytobenthos, -18.4...
Tipo: Text
Palavras-chave: SW France; Arcachon Bay; Spatial variability; Mixing model; Trophic sources; C and N stable isotopes; Muscle; Ruditapes philippinarum.
Ano: 2009
URL: https://archimer.ifremer.fr/doc/2009/publication-6886.pdf

La pêche à Terre-Neuve en 1929 (rapport de mission)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Beauge, L.
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1930
URL: http://archimer.ifremer.fr/doc/1930/publication-5848.pdf

Lexique d’écologie, d’environnement et d’aménagement du littoral
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cabane, Francois.
Différentes Administrations, nationales et internationales, ainsi qu’un grand nombre d’auteurs agissant en leur nom propre pour expliciter le contenu de leurs publication, ont créé des Glossaires. Sans vouloir faire une somme de tous ces savoirs, qui aurait débouché sur un document trop gros et vite inutilisable, j’ai voulu rassembler ici l’essentiel de ces savoirs, en gardant pour motif constant l’esprit de l’ « Aménagement du Littoral ».
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00026/13721/10827.pdf

CIGESMED for divers: Establishing a citizen science initiative for the mapping and monitoring of coralligenous assemblages in the Mediterranean Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gerovasileiou, Vasilis; Dailianis, Thanos; Panteri, Emmanouela; Michalakis, Nikitas; Gatti, Giulia; Sini, Maria; Dimitriadis, Charalampos; Issaris, Yiannis; Salomidi, Maria; Filiopoulou, Irene; Dogan, Alper; D'Avray, Laure Thierry De Ville; David, Romain; Cinar, Melih Ertan; Koutsoubas, Drosos; Feral, Jean-pierre; Arvanitidis, Christos.
Background  Over the last decade, inventorying and monitoring of marine biodiversity has significantly benefited from the active engagement of volunteers. Although several Citizen Science projects concern tropical reef ecosystems worldwide, none of the existing initiatives has yet specifically focused on their Mediterranean equivalents. Mediterranean coralline reefs, known as “coralligenous”, are bioherms primarily built by calcifying rhodophytes on hard substrates under dim-light conditions; they are considered hotspots of biodiversity and are extremely popular among divers due to their complex structure, conspicuous biological wealth and high aesthetic value. Nevertheless, data on their distribution, structure and conservation status is lacking for...
Tipo: Text
Palavras-chave: Coralligenous assemblages; Coralligenous outcrops; Coralline reefs; Bioherms; Biodiversity hotspot; Monitoring; Citizen science; SCUBA diving; Mediterranean Sea.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00375/48596/48945.pdf

Planck 2018 results: XII. Galactic astrophysics using polarized dust emission
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Aghanim, N.; Akrami, Y.; Alves, Mir; Ashdown, M.; Aumont, J.; Baccigalupi, C.; Ballardini, M.; Banday, A. J.; Barreiro, R. B.; Bartolo, N.; Basak, S.; Benabed, K.; Bernard, J. -p.; Bersanelli, M.; Bielewicz, P.; Bock, J. J.; Bond, J. R.; Borrill, J.; Bouchet, F. R.; Boulanger, F.; Bracco, A.; Bucher, M.; Burigana, C.; Calabrese, E.; Cardoso, J. -f.; Carron, J.; Chary, R. -r.; Chiang, H. C.; Colombo, L. P. L.; Combet, C.; Crill, B. P.; Cuttaia, F.; De Bernardis, P.; De Zotti, G.; Delabrouille, J.; Delouis, Jean Marc; Di Valentino, E.; Dickinson, C.; Diego, J. M.; Dore, O.; Douspis, M.; Ducout, A.; Dupac, X.; Efstathiou, G.; Elsner, F.; Ensslin, T. A.; Eriksen, H. K.; Falgarone, E.; Fantaye, Y.; Fernandez-cobos, R.; Ferriere, K.; Finelli, F.; Forastieri, F.; Frailis, M.; Fraisse, A. A.; Franceschi, E.; Frolov, A.; Galeotta, S.; Galli, S.; Ganga, K.; Genova-santos, R. T.; Gerbino, M.; Ghosh, T.; Gonzalez-nuevo, J.; Gorski, K. M.; Gratton, S.; Green, G.; Gruppuso, A.; Gudmundsson, J. E.; Guillet, V.; Handley, W.; Hansen, F. K.; Helou, G.; Herranz, D.; Hivon, E.; Huang, Z.; Jaffe, A. H.; Jones, W. C.; Keihanen, E.; Keskitalo, R.; Kiiveri, K.; Kim, J.; Krachmalnicoff, N.; Kunz, M.; Kurki-suonio, H.; Lagache, G.; Lamarre, J. -m.; Lasenby, A.; Lattanzi, M.; Lawrence, C. R.; Le Jeune, M.; Levrier, F.; Liguori, M.; Lilje, P. B.; Lindholm, V.; Lopez-caniego, M.; Lubin, Pm; Ma, Y. -z.; Macias-perez, J. F.; Maggio, G.; Maino, D.; Mandolesi, N.; Mangilli, A.; Marcos-caballero, A.; Maris, M.; Martin, Pg; Martinez-gonzalez, E.; Matarrese, S.; Mauri, N.; Mcewen, J. D.; Melchiorri, A.; Mennella, A.; Migliaccio, M.; Miville-deschenes, M. -a.; Molinari, D.; Moneti, A.; Montier, L.; Morgante, G.; Moss, A.; Natoli, P.; Pagano, L.; Paoletti, D.; Patanchon, G.; Perrotta, F.; Pettorino, V.; Piacentini, F.; Polastri, L.; Polenta, G.; Puget, J. -l.; Rachen, J. P.; Reinecke, M.; Remazeilles, M.; Renzi, A.; Ristorcelli, I.; Rocha, G.; Rosset, C.; Roudier, G.; Rubino-martin, J. A.; Ruiz-granados, B.; Salvati, L.; Sandri, M.; Savelainen, M.; Scott, D.; Sirignano, C.; Sunyaev, R.; Suur-uski, A. -s.; Tauber, J. A.; Tavagnacco, D.; Tenti, M.; Toffolatti, L.; Tomasi, M.; Trombetti, T.; Valiviita, J.; Vansyngel, F.; Van Tent, B.; Vielva, P.; Villa, F.; Vittorio, N.; Wandelt, B. D.; Wehus, I. K.; Zacchei, A.; Zonca, A.
Observations of the submillimetre emission from Galactic dust, in both total intensity I and polarization, have received tremendous interest thanks to the Planck full-sky maps. In this paper we make use of such full-sky maps of dust polarized emission produced from the third public release of Planck data. As the basis for expanding on astrophysical studies of the polarized thermal emission from Galactic dust, we present full-sky maps of the dust polarization fraction p, polarization angle psi, and dispersion function of polarization angles ?. The joint distribution (one-point statistics) of p and N-H confirms that the mean and maximum polarization fractions decrease with increasing N-H. The uncertainty on the maximum observed polarization fraction, (max) =...
Tipo: Text
Palavras-chave: Polarization; Magnetic fields; Turbulence; Dust; Extinction; Local insterstellar matter; Submillimeter: ISM.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00654/76632/77786.pdf

Estimation de la biomasse de stocks de poissons par acoustique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Doray, Mathieu; Petitgas, Pierre; Masse, Jacques.
Estimer la biomasse d'un stock de poissons par acoustique nécessite de combiner des données de nature diverse collectées le long du parcours d'échantillonnage (Woillez et al., 2009). Il s'agit essentiellement de combiner trois champs de données spatialisées : une carte de densités acoustiques attribuées aux poissons, une carte de proportions d'espèces et une carte de longueurs moyennes.
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00003/11447/7997.pdf

Predicting Geographic Ranges of Marine Animal Populations Using Stable Isotopes: A Case Study of Great Hammerhead Sharks in Eastern Australia
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Raoult, Vincent; Trueman, Clive N; Kingsbury, Kelsey M; Gillanders, Bronwyn M; Broadhurst, Matt K; Williamson, Jane E; Nagelkerken, Ivan; Booth, David J; Peddemors, Victor; Couturier, Lydie Ir; Gaston, Troy F.
Determining the geographic range of widely dispersed or migratory marine organisms is notoriously difficult, often requiring considerable costs and typically extensive tagging or exploration programs. While these approaches are accurate and can reveal important information on the species, they are usually conducted on only a small number of individuals and can take years to produce relevant results, so alternative approaches may be preferable. The presence of latitudinal gradients in stable carbon isotope compositions of marine phytoplankton offers a means to quickly determine likely geographic population ranges of species that rely on productivity from these resources. Across sufficiently large spatial and temporal scales, the stable carbon isotopes of...
Tipo: Text
Palavras-chave: Habitat range population distributions; Movement; Species distribution model; Sharks; Manta rays; Stable isotopes; Tracking; Isoscape.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00662/77363/78935.pdf

Structure of an early oceanic rift in the northern red-sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guennoc, P; Pautot, G; Leqentrec, Mf; Coutelle, A.
Tipo: Text
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00131/24235/22228.pdf

Sand bodies and sand transport paths at the English Channel-North Sea border: Morphology, hydrodynamics and radioactive tracing
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Beck, C; Clabaut, P; Dewez, S; Vicaire, O; Chamley, H; Augris, C; Hoslin, R; Caillot, A.
Surficial sediments and detailed submarine morphology of the southern Strait of Dover have been mapped using different complementary techniques: side-scan sonar survey, bottom sediment sampling, and bathymetry. The geometry and regional pattern of sand bodies - sand waves, megaripples, sand ribbons, etc. - as well as current-meter data and eight radioactive tracing experiments in different settings, are presented and analyzed. The mean regional net sand transport is 0.2 m super(3)/linear metre/day. The strong tidal currents of the region studied are considered as the main factor responsible for sand transport, while the swell plays an important but local role in maintaining particulate matter in suspension.
Tipo: Text
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00268/37887/35968.pdf

Global functional diversity of freshwater fish is concentrated in the Neotropics while functional vulnerability is widespread
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Toussaint, A.; Charpin, N.; Brosse, S.; Villeger, S.
Worldwide biodiversity assessments have mainly focused on species richness but little is known about the diversity of species roles, i.e. functional diversity, while this is a key facet to understanding the consequences of global changes on the ecosystem services to human societies. Here, we report the world pattern of functional diversity of freshwater fish using a database encompassing morphological characteristics of more than 9,000 species. The Neotropical realm hosts more than 75% of global functional diversity while other realms each host less than 25%. This discrepancy is mediated by high functional uniqueness in some diversified Neotropical fish orders. Surprisingly, functional diversity patterns were weakly related to functional vulnerability. In...
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00324/43503/74440.pdf

Les mesures techniques en usage de part et d'autre du détroit du Pas-de-Calais. Leurs implications pour les flotilles de pêche artisanale française
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Delpech, Jean-paul.
Les pêcheurs artisans de la région Nord / Pas-de-Calais travaillent souvent dans des secteurs de pêche situés de part et d'autre du détroit du Pas-de-Calais. La limite administrative entre ces deux secteurs, mer du Nord et Manche orientale, sépare deux unités de gestion au sens réglementaire du terme, avec notamment des mesures techniques différentes concernant le maillage minimum autorisé pour la pêche au chalut de fond.  Ces régimes différents sont perçus comme une contrainte supplémentaire par ces pêcheurs qui, bien que bénéficiant de ce qu'il est convenu d'appeler la " dérogation merlan", rencontrent encore des difficultés d'exploitation.  Ayant fait part de leurs problèmes à la Direction des Pêches Maritimes et des Cultures Marines, celle-ci a de...
Tipo: Text
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00074/18513/16054.pdf

Salmon Ranching in Iceland
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Isaksson, A.
Over the last thirty years, the catches of Atlantic salmon in Iceland gradually increased to reach 80 000 fishes in 1978. This increase is due to the possibility for the fishes to grow, to repopulation but also to the total prohibition of sea fishing, thus favouring the development of "sea-ranching". The "sea-ranching" projects conducted since 1963 have enabled return rates of 4-5 % with records of 10-15 %. [...]
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/publication-6051.pdf

Oceanic carbon and water masses during the Mystery Interval: A model-data comparison study
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Huiskamp, W. N.; Meissner, K. J.
The 'Mystery Interval' (17.5-14.5 ka BP) is characterized by a large decline in atmospheric Delta C-14 synchronous with an increase in atmospheric CO2. The most widely accepted hypothesis to explain these observed shifts involves the existence of an isolated 'old' ocean carbon reservoir that was subsequently ventilated. Here we use the UVic Earth System Climate Model to locate a potential carbon rich and Delta C-14 depleted water mass under 17.5 ka BP boundary conditions. We then investigate two mechanisms for the potential ventilation of such a reservoir, namely the weakening of the North Atlantic Meridional Overturning due to iceberg calving and latitudinal shifts in Southern Hemisphere Westerlies (SHW) due to southern hemispheric warming. We find that...
Tipo: Text
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00265/37602/36904.pdf

Comment on “Sedimentation Controls on Methane‐Hydrate Dynamics Across Glacial/Interglacial Stages: An Example From International Ocean Discovery Program Site U1517, Hikurangi Margin”
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sultan, Nabil.
In the IODP 372A proposal, working hypotheses used with respect to actively deforming gas hydrate‐bearing landslides were based on an initial calculation considering gas hydrate to occur in fresh water. This initial inaccuracy leads to predict the base of methane hydrate stability zone (MHSZ) to be at around 162 meters below the seafloor (mbsf) at site U1517 while it is expected to be between 85 and 128 mbsf. It is most interesting that important negative chloride anomalies were measured well below the theoretical MHSZ without direct evidence of the presence of gas hydrate. These anomalies are usually a strong indication of gas hydrate occurrence. This initial inaccurate hypothesis provides the opportunity to evaluate the effectiveness of the indirect...
Tipo: Text
Palavras-chave: Hikurangi; Hydrate; IODP; Salinity.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00628/74043/73389.pdf

Guide pour le suivi de la qualité du milieu marin en Nouvelle-Calédonie
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Beliaeff, Benoit; Bouvet, Guenole; Fernandez, Jean-michel; Laugier, Thierry; David, Carine.
This guide is intended to facilitate the implementation of specifications for marine environmental monitoring in New Caledonia. It is intended for public or private environmental actors. He provides a set of information on marine monitoring: summary of environmental regulations and the practical implications, definitions of terms, proposed general approach for the establishment of a monitoring, sampling strategy elements, method to develop reference frames, recommendations for the management and exploitation of data collected. The guide also provides lists of suggested environmental parameters to monitor for different pressures and general state of the environment, as well as, a set of methodology sheets for parameters and (when available) the reference...
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00050/16163/13647.pdf

Identification biogéographique des principaux stocks exploités en Manche, relations avec ceux des régions voisines
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bennet, D; Casey, J; Dare, P; Dawson, W; Flatman, S; Hulme, T; Macer, C; Millner, R; Pickett, G; Vince, M; Lorance, Pascal; Souplet, A; Giret, M; Morin, Jocelyne; Berthou, A; Latrouite, Daniel; Morizur, Yvon; Bossy, S; Ozanne, S.
At present, the majority of fisheries are monitored and regulated in areas which are delineated by arbitrary ICES boundaries which do not necessarily have logical or consistent relationships with biological processes or fish movements. The biogeographical identification of Channel stocks is, therefore, an important step towards developing a rational strategy for the management of their fisheries. This synthesis is based on the wide available knowledge which has not been yet entirely exploited with the purpose of stock identification, for 25 commercially important species in the Channel. In addition, principal technics for stock identification are reviewed likewise environmental characteristics of the Channel, which represent fundamental components in...
Tipo: Text
Palavras-chave: Environnement physico chimique; Méthodes d'identification; Migrations; Zones de ponte; Distribution géographique; Espèces exploitées; Identité de stock; Manche; Physical environment; Identification methods; Migrations; Spawning areas; Geographical distribution; Exploited species; Stock identification; Channel.
Ano: 1993
URL: https://archimer.ifremer.fr/doc/1993/rapport-719.pdf

Natural Degradation and Biodegradation of Poly(3-Hydroxybutyrate-co-3-Hydroxyvalerate) in Liquid and Solid Marine Environments
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Deroine, Morgan; Cesar, Guy; Le Duigou, Antoine; Davies, Peter; Bruzaud, Stephane.
In this study, natural degradation and biodegradation of poly(3-hydroxybuyrate-co-3-hydroxyvalerate) (PHBV) films were followed in different marine environments. First of all, ageing of PHBV films was investigated in natural seawater for 180 days and degradation was followed by means of weight loss measurements, scanning electron microscopy (SEM), differential scanning calorimetry and steric exclusion chromatography. In a second part, biodegradation tests were performed on PHBV powder, by following carbon dioxide (CO2) release(,) to highlight the PHBV bioassimilation of marine microorganisms. Three different marine environments were considered for biodegradation tests: a solid inoculum with foreshore sand, a solid-liquid inoculum with sand and seawater and...
Tipo: Text
Palavras-chave: PHBV; Natural ageing; Degradation; Biodegradation; Seawater.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00296/40735/42020.pdf

Measuring individual feed efficiency and its correlations with performance traits in Nile tilapia, Oreochromis niloticus
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: De Verdal, Hugues; Mekkawy, Wagdy; Lind, Curtis E.; Vandeputte, Marc; Chatain, Beatrice; Benzie, John A. H.
Estimating individual feed intake of fish held in groups has long been a challenge precluding precise knowledge of the individual variation of feed efficiency (FE) in fish. In this study, counts of the number of feed pellets (1.63 mg on average) eaten by individual tilapia (Oreochromis niloticus) held in 8 mixed sex groups of 15 fish were measured from video recordings made over a period of 10 days where fish were fed twice daily to achieve compensatory growth after 10 days of fasting. The initial body weight of the fish was 9.77 ± 2.03 g. Accumulated measures of feed intake (FI) over 11 meals were found to achieve 95% repeatability and a high accuracy of estimation of FI. During the FI measurement period, the average fish growth was 12.0 ± 3.6 g, feed...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00357/46832/46707.pdf

Real-time Temperature and Salinity Quality Control based on minimum/maximum estimates from the known local variability
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gourrion, Jerome; Paugam, Caroline; Fachero, Vincent; Szekely, Tanguy; Briand, Dominique; Coatanoan, Christine.
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00485/59641/62666.pdf

Production and consumption of B group vitamins in situ.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kurata, A.
The changes in concentration of thiamine, biotin and vitamin B sub(12) in water of the soaked bottles for 6 h in situ in the north basin of Lake Biwa were examined successively over 30 hours. The concentrations of the vitamins changed comparatively during 6 h. soaking in situ. Generally, the concentrations of thiamine, biotin and vitamin B sub(12) were in high levels in the morning and in low levels in evening both in the soaked bottles and in the surrounding water. The fluctuation ranges in concentration of vitamins in a 5 m deep layer were greater than those in thermocline. From the data obtained with the soaked bottles in situ, it was supposed that the decrease of vitamins in concentration during the daytime surpass consumption of vitamins by...
Tipo: Text
Palavras-chave: Phytoplankton; Microorganisms; Bacteria; Metabolism; Biological production; Vitamin B; Fresh water.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-958.pdf

Effet des hautes pressions sur les indicateurs de maturation de la viande et d'altération du muscle de poisson
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cheret, Romuald.
This study deals with the influence of the high pressure process on the ageing of meat and the degradation of the fish muscle. The aim is to characterize the effect of the high pressure treatment on the protease activities responsible for degradation for the sea bass muscle (Dicentrarchus labrax  L.) and bovine muscle (Biceps femoris), but also on the texture, the colour and the microstructure. The samples were pressurized between 0 and 500 MPa during 5 minutes, and were stored at 4°C. The different proteasic systems involved in the post-mortem degradation of the muscle (mainly cathepsins and calpains) were quantified after the high pressure treatment and during the post-mortem storage. The results shown that the sensitivity of the proteases depended on...
Tipo: Text
Palavras-chave: Enzymes; Muscular proteins; Bovine muscle; Fish muscle; Proteases; High pressure; Protéines musculaires; Enzymes; Viande bovine; Muscle de poisson; Protéases; Hautes pressions.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/these-553.pdf

La pêcherie de crevettes tropicales de Guyane française. Problème des captures accessoires : estimation et implications
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vendeville, Philippe.
La flottille crevettière qui exploite les stocks de Pénéidés du plateau continental de Guyane Française comptait en 1981 81 chalutiers, en majorité de nationalité étrangére, et avait débarqué l'équivallent de 5700 tonnes de crevettes entières pour l'année entière. Lors des opérations de pêche, d'autres organismes marins sont capturés en même temps que les crevettes par les chaluts. En majorité ce sont des poissons osseux. Trois campagnes de pêche expérimentale effectuées en 1981 ont permis d'estimer au moyen d'une technique d'échantillonnage stratifié, la biomasse accessible au chalut à crevettes.  Il apparait que dans la zone du plateau continental exploitée par la flottille, les crevettes ne representent guère qu'entre 1/30 et 1/20 ème de la biomasse...
Tipo: Text
Ano: 1984
URL: http://archimer.ifremer.fr/doc/00137/24796/22873.pdf

Mer de Corail
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Loubersac, Lionel.
This text, published in the work “101 words to understand Australia”, describes the geography of the Coral Sea and develops the specific marine characteristics of the biodiversity and geodiversity of this semi-closed sea Considering its history, this text calls back the various migrations which authorized the installation of man in Australia and in the archipelagoes that border this sea, the main European explorations of the XVII, XVIII and XIXth centuries as well as the fact that it was the theater of a series of major air-sea battles between USA and Japan during the Second World War. A conclusion summarizes the stakes carried out by this region of the world, in particular the conservation and development of marine resources, and the fact that it...
Tipo: Text
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00439/55095/56538.pdf

Optimisation des panneaux Jumper - Rapport final
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vincent, Benoit; Vacherot, Jean-philippe; Dagorn, Michel; Leroy, Yvon; Gamblin, Caroline.
Le projet Jumper a été déposé en réponse à l’appel d’offre de France Filière Pêche (FFP) de mai 2012. Il se base sur une proposition de l’ANOP et de l’UAPF. Le projet est porté par le CNPMEM en partenariat avec l’Ifremer, les établissements Morgère et l’IMP. Il a été labellisé par le Pôle Mer Bretagne Atlantique fin 2012. Le calendrier prévisionnel prévoyait que les travaux soient réalisés du 1er janvier 2013 au 30 juin 2014. Un avenant a permis de les poursuivre jusqu’à fin 2014 et d’organiser la restitution début 2015. L’objectif du projet était d’optimiser un panneau de chalut, préalablement mis au point, appelé « Jumper » moins impactant sur les fonds marins et permettant des économies d’énergie. Cette optimisation concernait la facilitation de...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00292/40290/38723.pdf

Données sur la situation de la maladie de l'huître plate, Ostrea edulis L.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Grizel, Henri; Tige, Gilbert; Rabouin, Marie-agnès.
Throughout the years 1974-1975, the flat oyster (Ostrea edulis Linné) disease has gradually spread to most of the French oyster culture centres and caused very important losses in farmed oysters and natural deposits. This note analyses the current evolution of the epizooty; to do so, we differentiate three types of flat oyster culture centres: Centres affected in the past by the epizooty and where the traditional flat oyster culture has become uncertain. It has been replaced by the culture of Crassostrea gigas and by the finishing, for 7 to 8 months, of flat oysters aged 3 or 4 years old which remained of good quality. Centres recently touched by the epizooty where the culture of flat oysters (18 months and 2 years old) from unharmed spat is still possible...
Tipo: Text
Palavras-chave: Marteilia refringens; Pathologie; Ostrea edulis; Huître.
Ano: 1976
URL: http://archimer.ifremer.fr/doc/1976/acte-5928.PDF

Lagune de Salses - Leucate. I - Analyse bibliographique.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ladagnous, Helene; Le Bec, Claude.
Subjected to multiple modifications which are responsible for important disruption in the functionning of the lagoon ecosystem during the last decenies, this lagoon is one of the most important sites for the region economy. The aim of this study is to propose a knowledges synthesis utilizable for a future fitting and management water plan. In fact, many studies realized during the last years are obsolete or uncompleted to explain the present state. Hydrogeololical studies, the most important, are not completed to understand the karst-lagoon relations. The wind-driven flow in the closed bassin, must be considered to explain biogeochemical process and the sewage discharges dispersal in the lagoon. Numerical models, with new physicochemical data, appear to be...
Tipo: Text
Palavras-chave: Lagune; Méditerranée; Leucate; Salses; Géographie; Climatologie; Géologie; Hydrologie; Physico-chimie; Biologie; Pollution; Socio-économie; Règlementation; Lagoon; Mediterranean; Leucate; Salses; Geography; Climatology; Geology; Hydrology; Physico-chemistry; Biology; Pollution; Socio-economy; Legislation.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00073/18422/15963.pdf

Coûts liés aux micropolluants. Sous-région marine Manche - mer du Nord. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Perez, Jose; Jacob, Céline.
Tipo: Text
Palavras-chave: Manche; Mer du Nord; Micropolluants; Dégradation milieu marin; Coûts; Suivi; Actions positives.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00328/43912/43485.pdf

Résultats de la Surveillance de la Qualité du Milieu Marin Littoral. Départements : Loire-Atlantique et Vendée. Edition 1999
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: IFREMER, laboratoire côtier de Nantes.
Tipo: Text
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00319/42971/42476.pdf

Origin of fine-scale wind stress curl structures in the Benguela and Canary upwelling systems
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Desbiolles, Fabien; Blanke, Bruno; Bentamy, Abderrahim; Grima, Nicolas.
Numerous studies have shown the primary importance of wind stress curl in coastal upwelling dynamics. The main goal of this new analysis is to describe the QuikSCAT surface wind stress curl at various scales in the Benguela and Canary upwelling systems. The dominant spatial pattern is characterized by cyclonic curl near continental boundaries and anticyclonic curl offshore, in association with equatorward alongshore (upwelling favorable) wind stress. At a smaller scale, we demonstrate the sensitivity of the QuikSCAT wind stress curl to coastal processes related to sea surface temperature (SST) mesoscale fluctuations by presenting a linear relationship between the curl and crosswind SST gradients. Despite the spatial and temporal sensitivity of the...
Tipo: Text
Palavras-chave: Wind stress; Upwelling; SST-wind interactions.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00233/34412/32820.pdf

Note sur les stocks de merlans du sud de la Mer du Nord et de la Mer d'Irlande en 1964
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lamolet, J.
Tipo: Text
Ano: 1965
URL: http://archimer.ifremer.fr/doc/1965/publication-7253.pdf

Impacts de l’extraction sélective d’espèces sur les populations, les communautés et les réseaux trophiques. Sous-région marine Méditerranée occidentale. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Trenkel, Verena.
Tipo: Text
Palavras-chave: Méditerranée; Extraction sélective; Espèces; Impacts; Populations; Communautés; Réseau trophique.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00331/44251/43820.pdf

Behavior of Li and its isotopes during serpentinization of oceanic peridotites
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Decitre, S; Deloule, E; Reisberg, L; James, R; Agrinier, P; Mevel, C.
[1] Analyses of Li and Li isotopes in serpentinized peridotites have been performed using Thermo-Ionisation Mass Spectrometry (TIMS) and Secondary Ion Mass Spectrometry (SIMS) techniques on samples collected from the southwest Indian Ridge (SWIR). In the bulk samples, Li concentrations range from 0.6 to 8.2 ppm, while whole rock delta(6)Li values range from -2.9 to -14parts per thousand. In situ analyses display a greater range in both Li concentration (0.1-19.5 ppm) and Li isotopic composition ( -27 to +19parts per thousand), with the serpentinized portions having higher Li concentrations than the associated relict phases. These variations may reflect changes in Li partitioning and isotopic fractionation between serpentine and fluid with temperature and...
Tipo: Text
Palavras-chave: Lithium; Isotopes; Geochemical cycle; Oceanic crust; Serpentinization.
Ano: 2002
URL: https://archimer.ifremer.fr/doc/00223/33403/31860.pdf

Cartographie des herbiers : actualisation de l'inventaire. Région Bretagne. Edition 2005
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dion, P.
Les herbiers de Zostères ont fait l’objet de premiers relevés sur les côtes bretonnes à l’occasion d’inventaires récents effectués à partir de données de terrain et/ou photo interprétées (Hily et al., 1999, Leveque, 2004, Alloncle, 2005). L’objet du présent travail est de compléter de manière exhaustive l’inventaire des herbiers de Zostera noltii sur l’ensemble de la côte nord et sur quelques secteurs riches de la côte sud, tout en les cartographiant plus précisément
Tipo: Text
Ano: 2006
URL: https://archimer.ifremer.fr/doc/00679/79140/81644.pdf

Etude des peuplements de deux marais des Olonnes en vue d'une caractérisation écologique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Auby, Isabelle; Prunier, Dominique.
In 1982-83, two fishponds situated in the North of Sables d'Olonne were the object of monitoring of the physico-chemical parameters and of the populations of macrophytes (seaweeds and phanerogams) and invertebrate macrofauna. This report presents the obtained results and considerations on the functioning of these systems.
Tipo: Text
Ano: 1983
URL: http://archimer.ifremer.fr/doc/00075/18662/16211.pdf

Rapport annuel 2002
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
La richesse des activités et des résultats de l'Ifremer s'est confirmée en 2002. Ce rapport d'activité décrit de nombreux résultats : des résultats scientifiques comme la faible variabilité génétique des crevettes de la filière néo-calédonienne ou la découverte d'assemblages écosystémiques originaux associés aux sorties d'hydrocarbures dans le golfe de Guinée, des résultats technologiques avec le succès de la diffusion du logiciel de simulation numérique des engins de pêche (DynamiT) ou le transfert opérationnel de l'outil de cartographie sismique à trois dimensions. Il montre également des résultats dans le domaine de la gestion de données avec la production d'un cédérom regroupant les données de 108 campagnes océanographiques en Méditerranée, ou avec la...
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/rapport-4829.PDF

Evaluation of the global oceanic isoprene source and its impacts on marine organic carbon aerosol
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Arnold, S. R.; Spracklen, D. V.; Williams, J.; Yassaa, N.; Sciare, J.; Bonsang, B.; Gros, V.; Peeken, I.; Lewis, A. C.; Alvain, S.; Moulin, C.
We have combined the first satellite maps of the global distribution of phytoplankton functional type and new measurements of phytoplankton-specific isoprene productivities, with available remote marine isoprene observations and a global model, to evaluate our understanding of the marine isoprene source and its impacts on organic aerosol abundances. Using satellite products to scale up data on phytoplankton-specific isoprene productivity to the global oceans, we infer a mean "bottom-up" oceanic isoprene emission of 0.31 +/- 0.08 (1 sigma) Tg/yr. By minimising the mean bias between the model and isoprene observations in the marine atmosphere remote from the continents, we produce a "top-down" oceanic isoprene source estimate of 1.9 Tg/yr. We suggest our...
Tipo: Text
Ano: 2009
URL: https://archimer.ifremer.fr/doc/00218/32915/31411.pdf

Response of North-Atlantic Ocean circulation to atmospheric weather regimes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Barrier, Nicolas; Cassou, Christophe; Deshayes, Julie; Treguier, Anne-marie.
A new framework is proposed for investigating the atmospheric forcing of North-Atlantic ocean circulation. Instead of using classical modes of variability, such as the North-Atlantic Oscillation (NAO) or the East-Atlantic Pattern, we here use the weather regimes paradigm. Using this framework we avoid problems associated with the assumptions of orthogonality and symmetry that are particular to modal analysis and known to be unsuitable for the NAO.  Using ocean-only historical and sensitivity experiments, we investigate the impacts of the four winter weather regimes on horizontal and overturning circulations. Our results suggest that the Atlantic Ridge (AR), NAO− and NAO+ regimes induce a fast (monthly to interannual timescales) adjustment of the gyres via...
Tipo: Text
Palavras-chave: Circulation; Dynamics; Meridional overturning circulation; Atm; Ocean Structure; Phenomena; Gyres; North Atlantic Oscillation; Wind; Physical Meteorology and Climatology; Climate classification; Regimes; Models and modeling; Ocean models.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00161/27258/25467.pdf

Tortues marines. Sous-région marine Golfe de Gascogne. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Claro, Françoise; De Massary, Jean-christophe.
Tipo: Text
Palavras-chave: Golfe de Gascogne; Tortues marines; Espèces; Distribution.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00329/44031/43603.pdf

Filets à Dorades. Occitanie. 2018. Observation des Marées au débarquement - OBSDEB
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public. Ces indicateurs intègrent...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00596/70849/69082.pdf

Apport à la connaissance de la paléohydrologie de l'Atlantique nord-oriental pendant le Quaternaire terminal
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Alvinerie, J; Caralp, M; Latouche, C; Moyes, J; Vigneaux, M.
Tipo: Text
Ano: 1978
URL: http://archimer.ifremer.fr/doc/00123/23411/21238.pdf

Modelling benthic invasion by the colonial gastropod Crepidula fornicata and its competition with the bivalve Pecten maximus . 1. A new 0D model for population dynamics of colony-forming species
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Menesguen, Alain; Gregoris, Thomas.
The north-American marine gastropod Crepidula fornicata (Linné 1758), commonly called slipper limpet, has been introduced accidentally in Great Britain, along with American oysters (Crassostrea virginica) at the end of the 19th century. Its spreading, enhanced by oyster transport and international shipping, turned into invasion of a lot of benthic grounds along the North-European coasts. When local conditions are favorable to larval confinement and adult growth, the invasion by very dense populations may deeply change initially sandy or muddy benthic communities into similar “slipper limpet communities”. Competition for space eliminates several species of native infauna, and hampers the survival of some epibenthic bivalves such as the scallop Pecten...
Tipo: Text
Palavras-chave: Crepidula fornicata; Invasive species; Benthic gastropod; Colony model; Matching matrix; Pecten maximus; Competition; Population dynamics; Limit cycle.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00415/52601/53491.pdf

Mortalités d'huîtres japonaises sur le Banc de Ronce Les Bains : rapport provisoire au 4/8/88
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bodoy, Alain; Garnier, Jacqueline; Geairon, Philippe; Chagot, Dominique; Grizel, Henri; Comps, Michel; Razet, Daniel.
Depuis le mois de juin 1988, les ostréiculteurs ont fait part de la présence de mortalités importantes sur le banc de Ronce (bassin de Marennes-Oléron), d'abord auprès de l'Ifremer et des Affaires Maritimes, puis des pouvoirs publics. Ces problèmes ont été évoqués lors d'une réunion en Préfecture de Charente-Maritime, le 4 juillet 1988. Il s'est alors avéré nécessaire de réaliser un constat de la situation notamment sur le banc de Ronce, et de faire le point sur les causes pouvant être à l'origine de la situation sur les mortalités survenues dans cette zone. Cette décision a été confirmée le 12 juillet, lors d'une réunion à la Sous-Préfecture de Rochefort. Le présent rapport présente les résultats scientifiques actuellement disponibles, ainsi que les...
Tipo: Text
Palavras-chave: Mortalité; Météorolgie; Paramètres hydrologiques; Physiologie; Croissance; Bivalvia; Crassostrea gigas; Bassin de Marennes Oléron.
Ano: 1988
URL: http://archimer.ifremer.fr/doc/00086/19765/17406.pdf

Surface currents and upwelling in Kerguelen Plateau regions
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Zhou, M.; Zhu, Y.; D'Ovidio, F.; Park, Y.-h.; Durand, I.; Kestenare, E.; Sanial, V.; Van-beek, P.; Queguiner, B.; Carlotti, F.; Blain, S.
Mean currents, horizontal diffusivity and upwelling on the Kerguelen Plateau and the deep basin east of the Kerguelen Islands were studied using 48 World Ocean Circulation Experiment (WOCE) Standard Surface Velocity Program (SVP) drifters deployed during the 2011 austral spring KEOPS II (KErguelen Ocean Plateau compared Study II) cruise. These drifter data were analyzed based on autocovariances for temporal scales, least-squares fitted streamfunctions for estimating mesoscale mean currents, wind stress fields and Ekman pumping, and Taylor's single particle diffusivity for estimating horizontal dispersion of surface waters. The results have revealed the shelfbreak current on the southern and eastern shelf slopes of the Kerguelen Islands, transport of...
Tipo: Text
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00295/40621/39568.pdf

Ranges of moisture-source temperature estimated from Antarctic ice cores stable isotope records over glacial-interglacial cycles
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Uemura, R.; Masson-delmotte, V.; Jouzel, J.; Landais, A.; Motoyama, H.; Stenni, B.
A single isotope ratio (delta D or delta O-18) of water is widely used as an air-temperature proxy in Antarctic ice core records. These isotope ratios, however, do not solely depend on air-temperature but also on the extent of distillation of heavy isotopes out of atmospheric water vapor from an oceanic moisture source to a precipitation site. The temperature changes at the oceanic moisture source (delta T-source) and at the precipitation site (delta T-site) can be retrieved by using deuterium-excess (d) data. A new d record from Dome Fuji, Antarctica spanning the past 360 000 yr is presented and compared with records from Vostok and EPICA Dome C ice cores. In previous studies, to retrieve delta T-source and delta T-site information, different linear...
Tipo: Text
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00139/25062/23172.pdf

Population structure of Patella vulgata L. during succession on rocky shores in Southwest England
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hawkins, S J; Southward, A J; Barrett, R L.
Large concrete blocks have been placed on the exposed south side of Plymouth Break-water in most years since 1954. Examination of blocks of known age provides series of observations on community succession. Initial growth of green algae and then Fucus is followed by large numbers of fast-growing newly-settled Patella vulgata . The Patella graze down the algae, allowing subsequent build-up of a permanent population of barnacles. Inter-age class competition, together with the effects of the barnacles, promote re-structuring of the Patella population. There are a series of fluctuations which subside in amplitude as the community reaches maturity. The time-scale, however, is much longer (15-20 years) than anticipated from small experiments.
Tipo: Text
Ano: 1983
URL: http://archimer.ifremer.fr/doc/00247/35781/34294.pdf

Ecological data for western Indian Ocean tuna
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bodin, Nathalie; Chassot, Emmanuel; Sardenne, Fany; Zudaire, Iker; Grande, Maitane; Dhurmeea, Zahirah; Murua, Hilario; Barde, Julien.
Tipo: Text
Palavras-chave: Energetics; Fatty acids; Lipids; Morphometrics; Multi-tissues; Proteins; Stable isotopes; Trophic ecology; Tropical marine ecosystems; Tuna fisheries.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00626/73787/75067.pdf

Le vivaneau rouge (Lutjanus purpureus) dans la ZEE de Guyane française. Bilan des connaissances sur la biologie de l'espèce. Analyse de quelques aspects de la pêcherie vénézuélienne
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rivot, Etienne.
Tipo: Text
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00085/19655/17285.pdf

Etude de la qualité microbiologique et chimique des zones de production n°11.21 et 11.12 Sud Zone n°11.21 « Bande Littorale de Port La Nouvelle à la Franqui » et n°11.12 S « Etang de Bages Sigean Sud »
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Serais, Ophelie.
Trois points de suivi de tellines ont été échantillonnés de manière irrégulière entre juillet 2006 et décembre 2008, dans le cadre de l’étude de la zone n°11.21 « Bande littorale de Port la Nouvelle à la Franqui », avec le concours du Comité Local des Pêches de Port Vendres et la Prud’homie de Bages-Port la Nouvelle pour la réalisation des prélèvements. Le traitement des données acquises, permet d’estimer en B la qualité microbiologique de la zone n°11.21 pour le groupe 2 selon le règlement (CE) n°854/2004. Les résultats des analyses chimiques sont compatibles avec cette estimation en B de la qualité. Les résultats ne mettent pas en évidence de différence statistiquement significative entre les niveaux de contamination mesurés au niveau des trois points de...
Tipo: Text
Palavras-chave: Etude de zone; N°11.12 Sud et n°11.21; Qualité microbiologique estimée; E.coli; Coquillages fouisseurs.
Ano: 2009
URL: https://archimer.ifremer.fr/doc/00514/62606/66966.pdf

Statistique des pêches maritimes - Année 1883
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Tipo: Text
Ano: 1884
URL: http://archimer.ifremer.fr/doc/00162/27322/25551.pdf

Riverine supply to the eastern Mediterranean during last interglacial sapropel S5 formation: A basin-wide perspective
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Wu, Jiawang; Filippidi, Amalia; Davies, Gareth R.; De Lange, Gert J.
Organic-rich sapropel sediments were repeatedly deposited in the eastern Mediterranean Sea (EMS), in response to insolation-driven freshwater forcing. However, the exact freshwater sources and causal associated paleoclimate-related processes remain unresolved. Sapropel S5, formed during the insolation maximum of the last interglacial, is one of the most intensely developed sapropels of the Late-Quaternary. Here, detrital sediments of sapropel S5 obtained from 8 cores, together with 13 EMS surface samples, are analyzed for major elements, rare earth elements, and Sr and Nd isotopes. This permits a basin-wide investigation of the source and distribution of river-borne material to the EMS for sapropel S5, and its comparison to the present-day and the Holocene...
Tipo: Text
Palavras-chave: Sapropel S5; Eastern Mediterranean Sea; Provenance; Radiogenic isotopes; Major elements; Rare earth elements.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00435/54623/56024.pdf

Marine resources of the economic zone of New Caledonia
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Auzende, Jean-marie; Grandperrin, René; Bouniot, Emmanuel; Henin, Christian; Lafoy, Yves; De Forges, Bertrand; Van De Beuque, Sabrina; Virly, Sabrina.
The ZoNeCo programme, devoted to the evaluation of living and non-living marine resources within the Economic Zone of New Caledonia, illustrates clearly the Marine Benthic Habitats concept. It exhibits the study of the physical environment and disciplines such as geology and physical oceanography. The results acquired in these fields are used as bases to study the presence and the distribution of living species within a given habitat. The knowledge of all the parameters relative to each discipline is a useful guide for the evaluation and the sustainable management of living and nonliving resources.
Tipo: Text
Palavras-chave: Ressources marines; Habitat; Nouvelle Calédonie; Ressources Sud Ouest Pacifique; Marine resources; Habitat; New Caledonia; Southwest Pacific.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/publication-832.pdf

Analyse du déclin de la pêche artisanale à St Pierre et Miquelon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Eynaud, P.
Studying the reasons behind the decline in small-scale fisheries at Saint Pierre and Miquelon (SPM) requires assessing this decline. Between 1950 and 1985, the number of vessels utilised in small-scale fisheries dropped by a factor of seven and the mean age of fishers increased by 13 years. Individual catches have nevertheless remained stable and have even increased slightly since 1963. Can it be deduced that the crisis in small-scale fisheries is only due to a problem of fish stocks and the adjustment of the number of fishers to stock availability? Must the causes of decline be sought in the development of industrial fisheries? In the increase in costs? Or in market studies? By placing SPM in its geographical and historical context, these questions take...
Tipo: Text
Palavras-chave: SEM.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/rapport-4088.pdf

Southwest Pacific Ocean response to a warming world: Using Mg/Ca, Zn/Ca, and Mn/Ca in foraminifera to track surface ocean water masses during the last deglaciation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Marr, Julene P.; Carter, Lionel; Bostock, Helen C.; Bolton, Annette; Smith, Euan.
In situ measurements of Mg/Ca, Zn/Ca, Mn/Ca, and Ba/Ca in Globigerinoides bulloides and Globigerina ruber from southwest Pacific core top sites and plankton tow are reported and their potential as paleoproxies is explored. The modern samples cover 20 degrees of latitude from 34 degrees S to 54 degrees S, 7-19 degrees C water temperature, and variable influence of subantarctic (SAW) and subtropical (STW) surface waters. Trace element signatures recorded in core top and plankton tow planktic foraminifera are examined in the context of the chemistry and nutrient profiles of their modern water masses. Our observations suggest that Zn/Ca and Mn/Ca may have the potential to trace SAW and STW. Intraspecies and interspecies offsets identified by in situ...
Tipo: Text
Palavras-chave: Mg; Ca; Mn; Ca; Ba; Ca; Zn; Ca; Southwest Pacific Ocean; Globigerina bulloides; Globigerinoides ruber; Surface ocean; Stratification; Temperature; Nutrient.
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00264/37528/35765.pdf

Rbiative timing of precipitation and ocean circui In changes in the western equatorial Atlantic over the last 45 kyr
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Waelbroeck, Claire; Pichat, Sylvain; Bohm, Evelyn; Lougheed, Bryan C.; Faranda, Davide; Vrac, Mathieu; Missiaen, Lise; Vazquez Riveiros, Natalia; Burckel, Pierre; Lippold, Joerg; Arz, Helge W.; Dokken, Trond; Thil, Francois; Dapoigny, Arnaud.
Thanks to its optimal location on the northern Brazilian margin, core MD09-3257 records both ocean circulation and atmospheric changes. The latter occur locally in the form of increased rainfall on the adjacent continent during the cold intervals recorded in Greenland ice and northern North Atlantic sediment cores (i.e., Greenland stadials). These rainfall events are recorded in MD09-3257 as peaks in ln(Ti / Ca). New sedimentary Pa / Th data indicate that mid-depth western equatorial water mass transport decreased during all of the Greenland stadials of the last 40 kyr. Using cross-wavelet transforms and spectrogram analysis, we assess the relative phase between the MD09-3257 sedimentary Pa / Th and ln(Ti/Ca) signals. We show that decreased water mass...
Tipo: Text
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00460/57126/59040.pdf

Energy transfer in the Congo deep-sea fan: from terrestrially-derived organic matter to chemosynthetic food webs
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pruski, A. M.; Decker, Carole; Stetten, E.; Vetion, G.; Martinez, P.; Charlier, K.; Senyarich, C.; Olu, Karine.
Large amounts of recent terrestrial organic matter (OM) from the African continent are delivered to the abyssal plain by turbidity currents and accumulate in the Congo deep-sea fan. In the recent lobe complex, large clusters of vesicomyid bivalves are found all along the active channel in areas of reduced sediment. These soft-sediment communities resemble those fuelled by chemoautotrophy in cold-seep settings. The aim of this study was to elucidate feeding strategies in these macrofaunal assemblages as part of a greater effort to understand the link between the inputs of terrestrially-derived OM and the chemosynthetic habitats. The biochemical composition of the sedimentary OM was first analysed in order to evaluate how nutritious the available particulate...
Tipo: Text
Palavras-chave: Congo deep-sea fan; Food webs; Vesicomyid bivalves; Chemoautotrophy; Isotopic signatures; Fatty acid biomarkers.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00385/49686/50216.pdf

Data products for fish stocks and ecosystem assessment:the PELGAS survey example
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Doray, Mathieu; Petitgas, Pierre; Romagnan, Jean-baptiste; Huret, Martin; Duhamel, Erwan; Dupuy, Christine; Spitz, Jérôme; Berger, Laurent; Dorémus, Ghislain; Bourriau, Paul; Grellier, Patrick; Massé, Jacques; Sanchez, Florence.
The initial objective of the PELGAS integrated survey was to assess the biomass of small pelagic fish in the Bay of Biscay in spring. Sampling has been extended to study the spatial structure and dynamics of the pelagic ecosystem in springtime. The PELGAS survey has produced since 2000 long-term time-series of spatially-explicit data and indices, describing the main pelagic ecosystem components: hydrology, phytoplankton, mesozooplankton, fish and megafauna. In addition to small pelagic fish biomass estimates used for fish stock assessment, the survey now delivers two types of ecosystem products: standard gridded maps of ecosystem parameters, and a time series dataset of indicators of the Bay of Biscay pelagic ecosystem state. The evolution of the PELGAS...
Tipo: Text
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00457/56844/58693.pdf

Mosaic community dynamics on Juan de Fuca Ridge sulphide edifices: substratum, temperature and implications for trophic structure
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sarrazin, Jozee; Levesque, Christian; Juniper, S; Tivey, Margaret.
Introduction : Ecological studies at hydrothermal vents often emphasize the importance of spatio-temporal heterogeneity in organism distribution within individual sites (Sarrazin et al., 1997) but the relative roles of environmental conditions, biological interactions and/or random processes in structuring hydrothermal communities remain poorly understood (Sarrazin &amp; Juniper, 1999). A model of community succession developed by Sarrazin et al. (1997, 1999) proposed that a series of faunal assemblages form a mosaic community that colonizes hydrothermal edifices of the northeast Pacific vents. This paper further develops the succession model by incorporating new observations. At the core of the model is the recognition of distinct faunal assemblages that...
Tipo: Text
Palavras-chave: Model; Environmental conditions; North east Pacific; North east Pacific; Hydrothermal vent.
Ano: 2002
URL: https://archimer.ifremer.fr/doc/2002/publication-893.pdf

Eléments d'étude dynamique de la circulation océanique. Leur application à la distribution hydrologique de Terre-Neuve en septembre 1934
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Beauge, L.
Jadis Buchanan avait posé en principe que la cause initiale de la circulation océanique est la chaleur solaire et que le régime des vents n'intervient que comme cause secondaire. Le vent lui-même est causé par les variations de la chaleur solaire qui agit différemment sur des masses d'air contiguës de nature différente au point de vue température et hygrométrie, en provoquant des dilatations différentes et par suite des modifications d'équilibre. Il semble qu'aujourd'hui il y ait une tendance chez certains océanographes à attribuer au régime des vents la cause la plus importante des mouvements océaniques et il est certain que dans les régions qui présentent une grande homogénéité quant à la nature des eaux qu'on y rencontre, le vent agit en effet comme...
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1936
URL: http://archimer.ifremer.fr/doc/1936/publication-5740.pdf

Caractéristiques des petites pêches côtières et estuariennes de la côte atlantique du sud de l'Europe - Rapport final - France - Sud golfe de Gascogne
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Leaute, Jean-pierre; Caill-milly, Nathalie.
Tipo: Text
Palavras-chave: Côtes atlantiques de l'Europe; Golfe de Gascogne; Côtes portugaises; Typologie; Enquêtes socio-économiques; Flottilles de pêche côtière et estuarienne; Indicateurs économiques; European Atlantic coasts; Bay of Biscay harbours; Portuguese coasts; Fishing typology; Socio-economic inquiries; Coastal and estuarian fishing fleet; Economics factors.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00327/43813/43387.pdf

Data Harmonization Report. AtlantOS project
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Koop-jakobsen,; Waldmann,; Huber,; Harscoat, Valerie; Pouliquen, Sylvie.
AtlantOS WP7 is dedicated to improve harmonization of data management procedures, and thereby improve the quality, interoperability and discoverability of data resources in AtlantOS. To improve harmonization, AtlantOS WP7 works on multiple levels;  a) WP7 has identified selected areas, where significant improvements of interoperability can be obtained. This has resulted in the formulation of a common agreement stating a set of specific minimum standards, which shall ensure cross platform coherence. This includes minimum standards for use of identifiers for platforms and institutions, metadata including vocabularies, quality control and dissemination means. Furthermore, guidelines regarding DOI assignment, catalogue techniques and vocabulary use in AtlantOS...
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00360/47090/47013.pdf

Résultats de la Surveillance de la Qualité du Milieu Marin Littoral. Département : Finistère. Edition 2003
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer, laboratoire côtier de Concarneau.
Dans le cadre du Système national d'Information sur l'Eau, mis en place par le Ministère de l'Ecologie et du Développement Durable, l’Institut national de recherche marine (Ifremer) opère de façon coordonnée à l'échelle du littoral français trois programmes nationaux de surveillance : le réseau de contrôle microbiologique (REMI), le réseau de surveillance du phytoplancton et des phycotoxines (REPHY), le Réseau d'Observation de la Contamination Chimique (RNO). Le suivi des phycotoxines dans les coquillages réalisé par le REPHY est sous maîtrise d'ouvrage du Ministère de l'Agriculture et de la Pêche. Sous l’impulsion de la Directive européenne Cadre sur l'Eau (DCE), le réseau de surveillance benthique (REBENT) est en voie d’extension nationale.
Tipo: Text
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00316/42707/42083.pdf

Combined effects of temperature-salinity on larval survival of the Eastern oyster Crassostrea virginica in the Maryland portion of the Chesapeak Bay (USA)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Goulletquer, Philippe; Heral, Maurice; Prou, Jean.
Oyster landings in the Maryland portion of the Chesapeake Bay have declined by more than 50fold since the early part of the century, despite intensive management efforts. The annual shell repletion program is the most critical programmatic element to effect recovery of the ailing Eastern oyster Crassotrea virginica stock and fishery. The overall efficacy of shell repletion management depends primarily on the success of spat settlement on the planted shell, and furthermore on their survival rate. The Operations Research techniques and mathematical programming developed by Rothschild et al. (1991) attempt to maximize spat recruitment to the oyster stock subject to a series of operational constraints. Allocation and timing of shell deployment are the most...
Tipo: Text
Palavras-chave: Larval; Settlement; USA; Chesapeake Bay; Crassotrea virginica; Oysters.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/1994/publication-3074.pdf

Campagne RNOSED 1998 - Analyse de la contamination des sédiments du littoral Nord / Pas-de-Calais / Picardie
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Desombre, Julie; Lefebvre, Alain; Bucas, Karenn.
The National Network of Observation (RNO) of the IFREMER is a monitoring network of the quality of the marine environment. This report is interested in the results of series of measurement from the RNO sediment of 1998 and relates to the analysis of the contamination of the coastal sediments from the Belgian coastal zone to Fécamp. Measurements relate to heavy metals and the organic compounds the such Polyaromatic Hydrocarbons (HAP), Polychlorobiphényles (PCB) and pesticides (DDT, Lindane). A statistical processing is carried out starting from the standardized metal contents and of the organic rough contents in order to highlight possible regroupings of intake points per level of pollution. The origins of the contamination given thanks to an inventory of...
Tipo: Text
Palavras-chave: Sédiment; RNO; Normalisation; Contaminants; Apports anthropiques; Sediment; RNO; Standardization; Contaminants; Anthropic fluxes.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/00167/27821/26014.pdf

Suivi « hydrologie » et « phytoplancton » des masses d'eau du bassin hydrographique Adour-Garonne en 2006-2011
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Auby, Isabelle; D'Amico, Florence; Neaud-masson, Nadine; Rumebe, Myriam; Barbier, Claire; Duval, Magali; Tournaire, Marie-pierre; Trut, Gilles; Plus, Martin; Maurer, Daniele; Ryckaert, Mireille; Derrien, Annick; Margat, Sylvie; Schmitt, Anne; Charpentier, Gabriel; Seugnet, Jean-luc; Grizon, James; Geairon, Philippe; Guilpain, Patrice; Thomas, Gerard; Guesdon, Stephane; Llevot, Gerard; Beaugrand, Philippe; Carrere, Christian; Michel, Valerie; Petrau, Christian; Bariou, Jean; Landier, Pascal; Debinski, Olivier; Le Mao, André; Miguel, Valérie.
Ce rapport rend compte des résultats acquis entre 2006 et 2011 sur les paramètres hydrologiques et le phytoplancton, dans le cadre des réseaux REPHY et ARCHYD (pour les points du Bassin d’Arcachon), et celui du contrôle de surveillance des masses d'eau du district Adour-Garonne qui ne faisaient pas l’objet de suivi avant la mise en œuvre de la DCE. Ce document contient des résultats concernant les éléments de qualité physico-chimique (oxygène dissous pour les deux types de masses d’eau, température et transparence pour les masses d’eau côtières exclusivement) selon des méthodes présentées dans trois documents (Daniel, 2009 a et b ; Daniel et Soudant, 2011), qui sont rapportées dans une annexe de ce rapport. Sont également inclues dans ce document les...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00111/22193/19862.pdf

Rapport sur l'activité du laboratoire de La Tremblade - Année 1968
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Trochon, Pierre.
Rapport sur l'activité du Laboratoire ISTPM (Institut Scientifique et Technique des Pêches Maritimes) de La Tremblade - Année 1968
Tipo: Text
Palavras-chave: Rapport activité; Conchyliculture; Hydrologie; Mortalité; Météorologie; Reproduction; Claire ostréicole; Crassostrea angulata; Ostrea edulis; Mytilus edulis; Marennes Oléron.
Ano: 1968
URL: http://archimer.ifremer.fr/doc/00069/18050/15592.pdf

Contamination chimique des sédiments des lagunes méditerranéennes françaises - Bilan de la Campagne ROCCHSED 2017
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Grouhel, Anne; Chiffoleau, Jean-francois; Crochet, Sylvette; Ouisse, Vincent; Galgani, Francois; Munaron, Dominique.
le Réseau d’Observation de la Contamination Chimique (ROCCH) évalue la qualité chimique du milieu marin à partir des concentrations en contaminants mesurées dans la chair de mollusques et dans le compartiment superficiel fin des sédiments prélevés sur les fonds. La campagne ROCCHSED2017 est la 4ème campagne d’échantillonnage dans les lagunes méditerranéennes françaises. Elle a permis la mesure de concentrations en éléments traces métalliques et en contaminants organiques (sur la base des listes des réglementations en vigueur) dans les sédiments de 13 lagunes.
Tipo: Text
Palavras-chave: Sédiment; Contaminant chimique; ROCCH; Azote; Phosphore.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00467/57885/60184.pdf

Deuxième contribution a l'étude de la sédimentation dans le golfe de Gascogne
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Berthois, Leopold; Le Calvez, Yolande.
Après avoir exposé en détail les caractères des sédiments dragués et carottés, nous allons résumer les données acquises puis nous tenterons d'en faire la synthèse dans les conclusions.   Les faits suivants ont été établis:   1° Les dragages sur les pentes du talus du plateau continental ont fourni des galets dont la lithologie est très monotone. Les principaux composants sont le quartz, les quartzites et plus rarement les roches cristallophylliennes. Les roches éruptives sont toujours très rares ou sont totalement absentes dans plusieurs stations.   Les dragages des stations 343 et 369 ont fourni des graviers en nombre important (quartz et quartzites).  Il est à noter que les terrasses de la Garonne présentent la même monotomie lithologique (HAUG, 1920)....
Tipo: Text
Ano: 1959
URL: http://archimer.ifremer.fr/doc/1959/publication-4499.pdf

Seasonal variations of downward particle fluxes in front of a reef pass (Moorea Island, French Polynesia)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Schrimm, M; Heussner, S; Buscail, R.
Downward particle fluxes off the Taotoi Pass, a typical Polynesian lagoon pass, have been measured over an annual cycle by means of an array of three mooring lines deployed at 40 m depth on the external sandy plain seawards of the Tiahura reef. Each line was equipped with two hand-operated sediment traps located 1.5 and 10 m above the bottom. During the 1-year survey, the traps were deployed for seven periods of 2-3 weeks. One line equipped with an automated trap was further deployed at 400 m depth on the deep fore-reef slope to collect deep settling particles over two consecutive 6-month periods. For all periods investigated, fluxes on the external plain were highest in front of the pass, and decreased by half on either side (up- and downstream with...
Tipo: Text
Palavras-chave: Flux particulaire; Exportation de carbone; Récif corallien; Carbone organique; Carbonate; Particle flux; Carbon export; Coral reefs; Organic carbon; Carbonate.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00322/43320/42934.pdf

First Evidence of Palytoxin and 42-Hydroxy-palytoxin in the Marine Cyanobacterium Trichodesmium
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kerbrat, Anne Sophie; Amzil, Zouher; Pawlowiez, Ralph; Golubic, Stjepko; Sibat, Manoella; Darius, Helene Taiana; Chinain, Mireille; Laurent, Dominique.
Marine pelagic diazotrophic cyanobacteria of the genus Trichodesmium (Oscillatoriales) are widespread throughout the tropics and subtropics, and are particularly common in the waters of New Caledonia. Blooms of Trichodesmium are suspected to be a potential source of toxins in the ciguatera food chain and were previously reported to contain several types of paralyzing toxins. The toxicity of water-soluble extracts of Trichodesmium spp. were analyzed by mouse bioassay and Neuroblastoma assay and their toxic compounds characterized using liquid chromatography coupled with tandem mass spectrometry techniques. Here, we report the first identification of palytoxin and one of its derivatives, 42-hydroxy-palytoxin, in field samples of Trichodesmium collected in...
Tipo: Text
Palavras-chave: Cyanobacteria; Trichodesmium; Palytoxin; 42-hydroxy-palytoxin; Clupeotoxism.
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00040/15143/12576.pdf

Topographie dynamique et courants généraux dans le bassin occidental de la méditerranée au nord du 42e parallèle (supplément a l'étude hydrologique de septembre-octobre 1958)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Allain, Charles.
The main circulation patterns described in the hydrological study of the sector in the Mediterranean Sea north of the 42nd parallel (Furnestin and Allain, 1962) were confirmed with data on the direction of general currents and their intensity.This study supplements the current dynamics study conducted during the summer of 1957 in the western part of the Mediterranean Sea (Allain, 1960) and provides data for comparing summer and fall current regimes, particularly in the Gulf of Lion.We used standard methods for dynamic calculations, which are described in a 1960 publication. We will directly discuss the vertical sections of current velocities on the 42nd parallel where observations were carried out down to the near-bottom, then we will examine the dynamic...
Tipo: Text
Ano: 1963
URL: http://archimer.ifremer.fr/doc/1963/publication-4114.pdf

Influence of Rossby waves on primary production from a coupled physical-biogeochemical model in the North Atlantic Ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Charria, Guillaume; Dadou, Isabelle; Cipollini, Paolo; Drevillon, Marie; Garcon, Veronique.
Rossby waves appear to have a clear signature on surface chlorophyll concentrations which can be explained by a combination of vertical and horizontal mechanisms. In this study, we investigate the role of the different physical processes in the north Atlantic to explain the surface chlorophyll signatures and the consequences on primary production, using a 3-D coupled physical/biogeochemical model for the year 1998.
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00058/16965/14457.pdf

Les ressources marines de la presqu'île de Guérande
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Soudan, France; Brienne, Henri; Maggi, Pierre; Ravoux, Georges; Vincent,.
La presqu'île qui s’étend entre les embouchures de la Loire et de la Vilaine, tire une bonne partie de ses ressources de la mer. Aux activités anciennes de pêche et de préparation du sel, sont venus s'ajouter au siècle dernier, la conchyliculture, l'industrie de la conserve de poisson, puis le tourisme balnéaire.  Le tourisme trouve là un cadre de choix avec une côte variée où se succèdent des plages renommées comme La Baule, Pornichet, Batz et Le Croisic, des falaises rocheuses, des plages plus modestes ou équipées, et des ports de plaisance. La part du tourisme augmente dans l'économie de la région. Néanmoins, les activités traditionnelles de pêche gardent un intérêt certain à la fois pour diversifier les sources de revenus de la région, fournir à la...
Tipo: Text
Ano: 1970
URL: http://archimer.ifremer.fr/doc/00126/23740/21611.pdf

Phytoplancton des zones myticoles de la baie de Vilaine et intoxication par les coquillages.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Andresen Leitao, Maria Da Paz; Lassus, Patrick; Maggi, Pierre; Le Baut, Claire; Chauvin, Jacky; Truouet, Philippe.
Following 1978 and 1981 human poisoning by mussels in Vilaine Bay (France) a survey of potentially toxic dinoflagellates was conducted in that area in 1982. At the same time paralytic shellfish poison (PSP) analyses were made, the authors studied the dinoflagellates encountered in the intestinal guts of mussels from January to August 1982. Results failed to demonstrate an occurrence of PSP producing species, either by toxicological analysis or dinoflagellate persistency in the mussel guts.
Tipo: Text
Palavras-chave: Mytilus edulis; Bivalvia; Marine mollusks; Stomach content; Toxicity; Phytoplankton; Biological poisons; Mussel culture.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/1982/publication-1853.pdf

Heinrich events: hydrological impact
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cortijo, E; Duplessy, Jc; Labeyrie, L; Duprat, J; Paillard, D.
The hydrological impact of the massive iceberg discharges during Heinrich events has been quantified for Heinrich 4 about 37 kyr ago. This event took place in a context of relatively stable orbital forcing and global ice volume. In this article, we propose to quantify the hydrological impact of the Heinrich event 1 which occurred at about 16 kyr BP. This time period is particularly interesting because orbital forcing was strong and it marks the onset of the last deglaciation. The results obtained here show that Heinrich event 1 has a larger isotopic amplitude than Heinrich event 4 when considering the cores located near the melting source. Concerning surface circulation, the northward progression of the North Atlantic Drift is affected only by Heinrich...
Tipo: Text
Palavras-chave: Variabilité climatique rapide; Dernière période glaciaire; Composition isotopique de l’eau; Événements de Heinrich; Rapid climatic variability; Lust glacial periods; Sea water isotopic composition; Heinrich events.
Ano: 2005
URL: https://archimer.ifremer.fr/doc/00232/34322/32714.pdf

Réseau de surveillance du phytoplancton (REPHY). Observations sur le bassin d'Arcachon de 1991 à 1994
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Masson-neaud, Nadine.
A part from the human health protection, the REPHY monitoring produced an important microplanktonic algae database. After a first investigation of the data from 1987 to 1990 at the site Teychan in Arcachon bay (MASSON, 94), it was interesting to continue. Other data processing is used in this second report. So, ail the series from 1987 to 1994 has been analysed. The eight years data revealed : - Microplanktonic algae were quantitatively poor compared to the other areas monitored along the who1e French coast. The lowest abundances were measured from June 1992 to the end of 1994; - Species which preferred this area according to Sanders' index were Chaetoceros spp., Asterionella glacialis, Leptocylindrus danicus, Skeletonema costatum and Thalassionema...
Tipo: Text
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00119/23065/20903.pdf

Characterization of a gonad-specific transforming growth factor-β superfamily member differentially expressed during the reproductive cycle of the oyster Crassostrea gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fleury, Elodie; Fabioux, Caroline; Lelong, Christophe; Favrel, Pascal; Huvet, Arnaud.
To study the complex and non identified host causes of summer mortality in C. gigas, divergent selection criteria based upon summer survival have been applied to produce resistant (R) and susceptible (S) oysterfamilies(Samain et al., 2007). A previous analysis by suppression-subtractive hybridization has characterized 46 differentially-expressedcDNAsbetween R and S families(Huvet et al., 2004). The present study reports the screening, using nylon array, of the 46 oyster SSHcDNAsfrom R and S selected families. Among the few differentially expressed genes characterized between R and S samples, one encodes a Transforming-Growth-Factor-β-related (TGFβ) protein. Members of the TGFβsuperfamily are critical growth factors regulating a variety ofimportant...
Tipo: Text
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00083/19425/17036.pdf

Phosphorus forms related to sediment grain size and geochemical characteristics in French coastal areas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Andrieux-loyer, Françoise; Aminot, Alain.
Phosphorus forms with respect to sediment characteristics, such as grain-size, and major chemical elements, were studied in French coastal marine areas (the Bay of Seine and the Loire and Gironde Estuaries).In the three areas, Fe/Al-bound phosphate (Fe/Al-P) and exchangeable phosphate (exch-P) were significantly related to the proportion of fine fraction (&lt; 63 mum). The special association of these forms with fine particles, as well as the relationships between exch-P, Fe/Al-P and Fe showed that adsorption processes on Fe oxides had taken place. However, for similar Fe concentrations, Bay of Seine sediments showed Fe/Al-P concentrations which were four to five times higher than those found in the Loire and Gironde Estuaries. This was attributed to...
Tipo: Text
Palavras-chave: Coastal areas; Major elements; Phosphorus forms; Grain size; Sediments.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-469.pdf

Congélation des produits marins à l'aide du dichlorodifluorométhane
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Crepey, J. R.
Les conditions de la congélation, en particulier le passage de 0°C à -10°C influent sur la qualité des produits traités. Il est reconnu qu'une congélation trop lente provoque des effets indésirables alors qu'une plus grande rapidité peut préserver la texture des tissus.  La vitesse de congélation est d'autant plus grande que les échanges thermiques entre le produit à congeler et le médium réfrigérant sont meilleurs. En principe le résultat optimum est obtenu lorsque le transfert de chaleur s'effectue avec changement d'état du fluide utilisé.  Le R.12, dont la température d'ébullition est relativement élevée(- 30° C) à pression normale, possède une chaleur latente de vaporisation (40 k cal/kg) voisine de celle de l'azote liquide (47 k cal/kg). Il permet la...
Tipo: Text
Ano: 1976
URL: http://archimer.ifremer.fr/doc/00126/23713/21568.pdf

Département Alpes-Maritimes. 2018. Activité des navires de pêche.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d’Informations Halieutiques » (SIH) de l’Ifremer, qui constitue le réseau d’observation des ressources halieutiques et des usages associés. Ce projet s’inscrit dans la mission de service d’intérêt public de l’Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l’analyse du secteur des pêches, le SIH a en charge l’élaboration d’indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche et du grand public.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00608/71998/70702.pdf

Amélioration du protocole de PCR quantitative pour la détection de l'OsHV1 chez l'huître creuse, Crassostrea gigas, dans le cadre du projet TRIPLOFIMER et suivi d'individus lors du phénomène de mortalité estivale dans le cadre du projet AQUAFIRST
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Riou, Antoine.
Depuis 1991, des épisodes de mortalités massives touchent les élevages ostréicoles français, notamment pour l'espèce Crassostrea gigas. Un des facteurs responsables de ces événements est le virus de l'Herpès de l'huître : Oyster Herpesvirus type 1 ou OsHV-1. Les travaux réalisés au cours de ce stage ont contribué dans un premier temps à l'amélioration du protocole d'analyse basé sur l'utilisation d'un appareil de Polymerase Chain Reaction (PCR) en temps résel, puis aux analyses et au suivi de la charge virale par cette technique, d'individus entrant dans le cadre des projets - TRIPLOMER et AQUAFIRST-UE. Cette approche permettra par la suite de réaliser des diganostics fiables de la maladie tout en précisant le nombre de copies ADN (Acide...
Tipo: Text
Palavras-chave: Protocole; Herpes vrus; PCR quantitative; Huîtres creuses; Crassostrea gigas; Diagnostic.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00033/14459/11761.pdf

Rapport de la campagne SOLPER 1 (26 août – 2 septembre 2005)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Leaute, Jean-pierre.
To estimate the size and abundance distribution of juvenile sole (Solea solea) of nurseries in the Pertuis charentais (France) in 2005, a small beam trawl of 2 m wide and 8 mm stretched mesh was used over a hundred sampling points. The other fish catches have also been recorded.
Tipo: Text
Palavras-chave: Pertuis charentais; Chalut à perche; Nourricerie; Sole commune; Solea solea; Juvéniles; Taille; Abondance; Pertuis charentais (France); Beam trawl; Nursery; Juvenile sole; Solea solea; Length; Abundance.
Ano: 2006

West Pacific climate and circulation over the last 160 kyr: A palaeontological and geochemical multiproxy reconstruction within the inflow path of the Indonesian Throughflow
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bolliet, Timothé Geoffroy.
Understanding the Earth´s present day climate and predicting its future evolution require investigation of high resolution sedimentary archives providing critical information of past oceanic and atmospheric variability. This study is based on two continuous marine sedimentary successions (Cores MD06-3067 and MD06-3075), recovered close to Mindanao Island (Philippines). The Indo-Pacific region represents a major source of heat and moisture, which are redistributed to the high latitudes by atmospheric and oceanic circulations; thus this region is a major actor in regulating global climate. The two cores investigated in this work are located within the inflow path of the Indonesian Throughflow. This ocean current provides a critical link within the...
Tipo: Text
Palavras-chave: West Pacific; Paleoclimate; Circulation; Indonesian Throughflow.
Ano: 2010
URL: https://archimer.ifremer.fr/doc/00495/60658/64155.pdf

REPAMO 2001. Bulletins de la surveillance. Juin et juillet 2001
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thebault, Anne.
Ce document compile l’ensemble des bulletins de la surveillance de la santé des mollusques marins émis au cours de l’année 2001 par le réseau REPAMO. Ces bulletins, édités à fréquence mensuelle ou en fonction du nombre d’événements, relatent les événements de mortalité notifiés au réseau ainsi que les résultats des analyses effectuées lors des prélèvements d’animaux réalisés sur les lieux des mortalités. Les bulletins sont diffusés aux instances professionnelles concernées (CRC, CNC, CDPMEM, CNPMEM, centres techniques), à la DGAL, à la DPMA, aux laboratoires d’analyses, à Ifremer ainsi que sur le site internet du REPAMO. Ils ont pour objectif de tenir les destinataires informés des épisodes de mortalités anormales de mollusques marins rencontrés sur le...
Tipo: Text
Palavras-chave: REPAMO; Surveillance zoosanitaire; Mollusques marins; Mortalités.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00480/59163/61941.pdf

Mapping of Adaptive Traits Enabled by a High-Density Linkage Map for Lake Trout
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Smith, Seth R.; Amish, Stephen J.; Bernatchez, Louis; Le Luyer, Jeremy; Wilson, Chris; Boeberitz, Olivia; Luikart, Gordon; Scribner, Kim T.
Understanding the genomic basis of adaptative intraspecific phenotypic variation is a central goal in conservation genetics and evolutionary biology. Lake trout (Salvelinus namaycush) are an excellent species for addressing the genetic basis for adaptive variation because they express a striking degree of ecophenotypic variation across their range; however, necessary genomic resources are lacking. Here we utilize recently-developed analytical methods and sequencing technologies to (1) construct a high-density linkage and centromere map for lake trout, (2) identify loci underlying variation in traits that differentiate lake trout ecophenotypes and populations, (3) determine the location of the lake trout sex determination locus, and (4) identify chromosomal...
Tipo: Text
Palavras-chave: Linkage map; Salvelinus; QTL; RAD; Genomics; Lake trout.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00634/74659/74565.pdf

Comparison between three-dimensional linear and nonlinear tsunami generation models
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kervella, Youen; Dutykh, Denys; Dias, Frédéric.
The modeling of tsunami generation is an essential phase in understanding tsunamis. For tsunamis generated by underwater earthquakes, it involves the modeling of the sea bottom motion as well as the resulting motion of the water above. A comparison between various models for three-dimensional water motion, ranging from linear theory to fully nonlinear theory, is performed. It is found that for most events the linear theory is sufficient. However, in some cases, more-sophisticated theories are needed. Moreover, it is shown that the passive approach in which the seafloor deformation is simply translated to the ocean surface is not always equivalent to the active approach in which the bottom motion is taken into account, even if the deformation is supposed to...
Tipo: Text
Palavras-chave: Nonlinear shallow water equations; Potential flow; Water waves; Boundary element method; Finite volume method; Tsunami generation.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2620.pdf

Etude comparative des harengs immatures de la baie du Mont Saint-Michel et de la baie de Seine et du sud de la mer du nord (bancs des Flandres)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ancellin, Jacques.
In this work, we compared some observations on some green herrings from the south of the North Sea and the English Channel. The comparison between their size, age and growth enabled us to define some of the main characters defining the herring populations cruising these areas.
Tipo: Text
Ano: 1953
URL: http://archimer.ifremer.fr/doc/1953/publication-6741.pdf

Rhabdovirus matrix protein structures reveal a novel mode of self-association.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Graham, Stephen C.; Assenberg, René; Delmas, Olivier; Verma, Anil; Gholami, Alireza; Talbi, Chiraz; Owens, Raymond J.; Stuart, David I.; Grimes, Jonathan M.; Bourhy, Hervé.
The matrix (M) proteins of rhabdoviruses are multifunctional proteins essential for virus maturation and budding that also regulate the expression of viral and host proteins. We have solved the structures of M from the vesicular stomatitis virus serotype New Jersey (genus: Vesiculovirus) and from Lagos bat virus (genus: Lyssavirus), revealing that both share a common fold despite sharing no identifiable sequence homology. Strikingly, in both structures a stretch of residues from the otherwise-disordered N terminus of a crystallographically adjacent molecule is observed binding to a hydrophobic cavity on the surface of the protein, thereby forming non-covalent linear polymers of M in the crystals. While the overall topology of the interaction is conserved...
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00139/24995/23093.pdf

Differentiating Lithogenic Supplies, Water Mass Transport, and Biological Processes On and Off the Kerguelen Plateau Using Rare Earth Element Concentrations and Neodymium Isotopic Compositions
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Grenier, Melanie; Garcia-solsona, Ester; Lemaitre, Nolwenn; Trull, Thomas W.; Bouvier, Vincent; Nonnotte, Philippe; Van Beek, Pieter; Souhaut, Marc; Lacan, Francois; Jeandel, Catherine.
Distributions of dissolved rare earth element (REE) concentrations and neodymium isotopic compositions (expressed as epsilon(Nd)) of seawater over and off the Kerguelen Plateau in the Southern Ocean are presented. The sampling took place during the austral spring bloom in October-November 2011 (KEOPS2 project, GEOTRACES process study) and aimed to further the investigations of the KEOPS1 austral summer study in terms of sources and transport of lithogenic material, and to investigate the impact of local biogeochemical cycles on the REE distributions. The REE signature of the coastal eastern Kerguelen Islands waters was characterized by negative europium anomalies (Eu/Eu*) and negative epsilon(Nd) in filtered samples. By contrast, the unfiltered sample...
Tipo: Text
Palavras-chave: Southern Ocean; Kerguelen Islands; Rare earth elements; Fractionation; Anomalies; Lithogenic; Biologic; GEOTRACES.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00616/72764/72274.pdf

Etude de la concentration bactérienne par le bouchon vaseux dans l'estuaire de la Loire
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ottmann, F.; Barbaroux,; Boutelier,; Lavaux,; Nikodic,; Quere, J; Bertrand,; Frenel,.
Des travaux antérieurs communs avaient laissé présumer une association étroite entre les bactéries et les MES dans l'Estuaire, qui devait se traduire par une très importante concentration de bactéries dans le Bouchon Vaseux. Cette étude détaillée fut l'objet du contrat CNEXO 77/1741 réalisé d'avril à octobre 1978, afin de saisir les diverses conditions hydrologiques de crue et étiage. On a montré d'abord les variations saisonnières du Bouchon Vaseux se déplaçant progressivement de St Nazaire à Nantes, en augmentant d'importance et de concentration. La flore bactérienne a été étudiée en surface, et au fond, avec l'accent sur la flore fécale, où de nombreux sérotypes furent étudiés pour les Salmonelles (très dangereuses). Ensuite on a montré l'existence...
Tipo: Text
Ano: 1979
URL: http://archimer.ifremer.fr/doc/00132/24324/22323.pdf

Quartier maritime Les Sables-d'Olonne. 2018. Activité des navires de pêche.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d’Informations Halieutiques » (SIH) de l’Ifremer, qui constitue le réseau d’observation des ressources halieutiques et des usages associés. Ce projet s’inscrit dans la mission de service d’intérêt public de l’Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l’analyse du secteur des pêches, le SIH a en charge l’élaboration d’indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche et du grand public.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00608/72032/70736.pdf

Lexique des structures histologiques des ovaires et de l'ovogenèse de la plie, Pleuronectes platessa (Linné, 1758)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kellner, Kristell; Sauger, Carine.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00501/61234/64811.pdf

Crepidula fornicata L. (Gastéropode, Calyptraeidae) dans le bassin de Marennes-Oléron : composition et valeur énergétique des individus et des pontes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Deslous-paoli, Jean-marc; Heral, Maurice.
In the bay of Marennes-Oléron, the shell represents 60% and the dry flesh from 3 to 8.5% of the total weight of Crepidula fornicata. Seasonal changes in the biochemical composition of the dry flesh show two periods of spawning for the females and a single period of reproduction for the males, and that the main component of the energy reserve is glycogen. The mean energy value of Crepidula fornicata varies between 15.1 and 19.3 joules/mg of ash-free dry weight of flesh (average 17.7) and this value is higher in the males than the females, during aIl the periods of reproduction. The females lay, as early as their third year, about 56 egg capsules at each spawning, containing a total of Il 725 eggs with an energy value of 22.4 joules/mg ash free dry weight.
Tipo: Text
Palavras-chave: Crepidula Jornicata; Composition biochimique; Valeur énergétique; Marennes-Oléron; Crepidula Jornicata; Biochemical composition; Energy value; Marennes-Oléron.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/publication-2964.pdf

Distribution growth temperatures, and gram reactions of psychrophilic sediment bacteria from tropical and subtropical regions of West-Africa.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ruger, H.
In depths &gt; 1,000 m viable counts of sediment bacteria from the continental slope off West-Africa were significantly higher after incubation of agar plates at 2 degree C than at 20 degree C. At a depth of 1,500 m in 17 degree N, for example, 438,000 cells/ml of wet sediment were found after incubation at 2 degree C, but at 20 degree C the counts were only 54,000 cells/ml. In the deep-sea of the eastern tropical Atlantic bacterial counts were low, between 70 and 14,000 cells/ml of wet sediment, and bout the same for both incubation temperatures. However, different types of bacteria were isolated, depending upon the incubation temperature applied. Most of the bacteria isolated from 20 degree C agar plates were Gram-positive and mesophilic. In contrast,...
Tipo: Text
Palavras-chave: ASW; Tropical Atlantic Bacteria Abyssal zone Pelagic sediments Deep water.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-949.pdf

Glacial-interglacial circulation changes inferred from Pa-231/Th-230 sedimentary record in the North Atlantic region
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gherardi, Jeanne Marie; Labeyrie, L.; Nave, S.; Francois, R.; Mcmanus, J. F.; Cortijo, E.
Studies from the subtropical western and eastern Atlantic Ocean, using the Pa-231/Th-230 ratio as a kinematic proxy for deep water circulation, provided compelling evidence for a strong link between climate and the rate of meridional overturning circulation (MOC) over the last deglaciation. In this study, we present a compilation of existing and new sedimentary Pa-231/Th-230 records from North Atlantic cores between 1710 and 4550 m water depth. Comparing sedimentary Pa-231/Th-230 from different depths provides new insights into the evolution of the geometry and rate of deep water formation in the North Atlantic during the last 20,000 years. The Pa-231/Th-230 ratio measured in upper Holocene sediments indicates slow water renewal above similar to 2500 m and...
Tipo: Text
Palavras-chave: MOC; North Atlantic; Deglaciation; 231Pa/230Th.
Ano: 2009
URL: https://archimer.ifremer.fr/doc/00233/34468/32855.pdf

Etude de la décontamination de moules toxiques (toxines diarrhéiques) en laboratoire et en milieu naturel
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Marcaillou-le Baut, Claire; Bardin, B.; Bardouil, Michele; Bohec, Madeleine; Le Dean, Loic; Masselin, Pierre; Truquet, Philippe.
Two studies of depuration, one in laboratory conditions and the other one in an oyster's pond were performed using 2 sets of contaminated mussels with diarrhetic toxins at a high and a low level (3 and 1 M.U.). Depuration kinetics were followed both by the adult mouse test and okadaïc acid analysis. Results are - in the pond, high toxic mussels need about 20 days to become eatable (toxicity level : 0.5 M.U.g-1 digestive glands), -this time decreases when the initial toxicity is low but it increases when mussels are underfed, - a good correlation is observed between the total toxicity and okadaïc acid concentration.
Tipo: Text
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00075/18595/16148.pdf

Trace element levels in foetus-mother pairs of short-beaked common dolphins (Delphinus delphis) stranded along the French coasts
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lahaye, V; Bustamante, Paco; Dabin, W; Churlaud, C; Caurant, Florence.
Tissues of foetus-mother pairs of common dolphins (Delphinus delphis) stranded along the French coasts (Bay of Biscay and English Channel) were analysed for their Cd, Cu, Hg, Se and Zn contents. In the kidneys, foetal Cd levels were extremely low, and strong relationships between Cu and Zn suggested the involvement of metallothioneins since early foetal life. The results also indicated a limited maternal transfer of Hg during pregnancy since levels in the tissues of foetuses were below 1 mu g g(-1) w.wt. However, hepatic Hg levels in foetuses increased with body length, and were also proportionate to maternal hepatic, renal and muscular Hg levels. Lastly, affinities between Hg and Se in tissues would participate in Hg neutralisation in both mothers-through...
Tipo: Text
Palavras-chave: North eastern Atlantic; Pregnancy; Selenium; Mercury; Marine mammals.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3691.pdf

Suspended sediments in a macrotidal estuary: comparison and use of different sensors
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lunven, Michel; Gentien, Patrick.
Measurements made using an in situ particle-sizer (PSA) were compared to those of an optical backscatter sensor (OBS) in a macrotidal estuary. Both estimate the total volume of particles. After comparison with dry weight of suspended matter sampled in the study area, the different measurements were converted into dry weight. In three different kinetic energy regimes, times series were coherent for most of the observations. Discrepancies of suspended sediment concentrations estimated by both sensors appeared under specific hydrodynamic conditions: they were related to occurrences of definite particle populations. Overestimations and underestimations of measurements by the instruments depend on the optical principles of the sensors (backscatter and...
Tipo: Text
Palavras-chave: Particle size; Suspended particulate matter; Aggregates; Taille de particule; Matières en suspension; Agrégats.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-521.pdf

Collaborative research: Development of a manual on elasmobranch handling and release best practices in tropical tuna purse-seine fisheries
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Poisson, Francois; Seret, Bernard; Vernet, Anne-lise; Goujon, Michel; Dagorn, Laurent.
The reduction of by-catch mortality is an objective of the ecosystem approach to fisheries and a request made by consumers. Elasmobranchs, an important component of the French tropical tuna purse seine fishery by-catch, are currently thrown back into the sea. Fishers interact with various types of elasmobranchs that range widely in size, weight and shape, and could pose various degrees of danger to the crew. A diversity of discarding practices within the fleet were reported, some practices were considered suitable, others needed to be adapted and improved and others simply had to be banned. The majority of the crews were likely to improve their handling practices if they were presented with practical suggestions that were quick and easy. Combining...
Tipo: Text
Palavras-chave: By-catch; Tropical purse-seiner; Sharks; Handling/release practices; Mitigation; Fish welfare.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00159/27008/28367.pdf

Exopolysaccharide biosynthesis and biodegradation by a marine hydrothermal Alteromonas sp. strain
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lelchat, Florian; Cozien, Joelle; Le Costaouec, Tinaig; Brandily, Christophe; Schmitt, Sophie; Baudoux, Anne-claire; Colliec-jouault, Sylvia; Boisset, Claire.
Alteromonas macleodii subsp. fijiensis biovar deepsane is a deep-sea ecotype exopolysaccharide-producing bacteria isolated from the polychaete annelid Alvinella pompejana. The high molecular weight biopolymer HYD657 produced by this strain, is the first marine exopolysaccharide (EPS) to be commercialized for cosmetic use. Depolymerization methods are necessary to elucidate the complete structure of this EPS and to generate potentially bioactive oligosaccharides. Enzymatic methods are useful for elucidating polysaccharide structure because they specifically cleave glycosidic bonds and do not require harsh chemical conditions. The HYD657 EPS is structurally complex and no commercially available enzymes are able to effectively degrade it. Here, we present the...
Tipo: Text
Palavras-chave: Marine Alteromonas macleodii sp strain; Bacterial exopolysaccharides; Microbial extracellular enzymes; Endogenous enzymatic degradation.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00240/35129/33893.pdf

Modern, Preindustrial, and Past (Last 25 ka) Carbon Isotopic (δ13C) Variability in the Surface Waters of the Southwest Pacific
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Maxson, Charles; Bostock, Helen; Mackintosh, Andrew; Mikaloff‐fletcher, Sara; Mccave, Nick; Neil, Helen.
Carbon stable isotopes (δ13C) in modern sea water samples and planktic foraminifera Globigerina bulloides from core top and down core sediments are used to estimate the distribution of δ13C of dissolved inorganic carbon (DIC) in the surface waters of the southwest Pacific in the modern, pre‐industrial (PI) and over the last 25 kyr. The predicted δ13C distribution in the modern (δ13CDIC), PI (δ13CPI) and late Holocene (from planktic foraminifera Globigerina bulloides (temperature corrected ‐ δ13CG.bulloidesTC) from core tops) display a broad peak at the Subtropical Front (STF) and subantarctic surface waters (SASW) due to the combination of high biological productivity and thermodynamic air‐sea gas exchange of CO2 in this region. The estimated δ13CPI values...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00488/59919/63103.pdf

The French sardine fishery
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Duhamel, Erwan.
This approach of the French sardine fishery shows mainly that pelagic trawlers are targeting less and less sardine, year after year. In an assessment approach, it would be necessary to define an estimation of fishing effort, but it will be very difficult. We are able to compt the number of fishing days, but not the time of fishing (or number of shoots for example for purse seiners) or time of searching schools. So, accessibility and catchability could be certainly more accurate than the fishing effort for assesment purposes.
Tipo: Text
Palavras-chave: Pelagic trawl; Purse seine; French fishery; Sardine; Survey; ICES; PELGAS; Chalut pélagique; Bolinche; French fishery; Sardine; Surveycampagne océanographqie; CIEM; PELGAS.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/acte-2292.pdf

Les pêches maritimes en pays Bigouden. Matériaux pour une contribution à l'histoire socio-économique des pêches
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vauclare, C.
Nous avons donc entrepris cette recherche comme une interrogation sur ces fameuses "conditions" du développement dans le secteur des pêches maritimes. Notre idée était alors d'essayer de saisir de façon diachronique l'évolution des forces de production, du mode de production et des rapports sociaux qui les ont accompagnés. Vaste projet. Mais nous avons plus modestement rappelé, dans l'élaboration de ce projet, que l'historien était tributaire de ses sources. En l'absence d'un certain nombre d'entre elles, nous nous sommes donc trouvé face a des impasses. Peut-être nous devons-nous de rappeler ici que, si nous n'avions pas préalablement travaillé sur la même période, mais a l'échelle de l'ensemble du littoral, il nous aurait été difficile de nous fixer une...
Tipo: Text
Palavras-chave: SEM.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/rapport-4137.pdf

Recommandations pour une approche écosystémique des aires d’implantation d’énergies marines renouvelables. Cas d’étude du parc éolien offshore de Courseulles-sur-mer
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Araignous, Emma; Beaugrand, Gregory; Ben Rais Lasram, Frida; Bourdaud, Pierre; Champagnat, Juliette; Dauvin, Jean-claude; Grangeré, Karine; Halouani, Ghassen; Haraldsson, Matilda; Hattab, Tarek; Le Loch, Francois; Leroy, Boris; Lejart, Morgane; Niquil, Nathalie; Nogues, Quintin; Pagot, J.-p.; Raoux, Aurore; Safi, Georges; Villanueva, Ching-maria.
Les études d’impact environnemental menées en amont des projets éoliens offshores considèrent chaque compartiment de manière individuelle, et non pas l’écosystème dans son ensemble. La compréhension des liens trophiques et l’appréhension de l’écosystème de manière holistique est pourtant un enjeu important rapporté par les politiques publiques telles que la Directive Cadre Stratégie pour le Milieu Marin (Directive 2008/56/EC). Le projet collaboratif TROPHIK (ANR-10-IEED-0006-12) pose les bases d’une approche écosystémique des Energies Marines Renouvelables (EMR) destinée à permettre une démarche holistique et intégrée avant installation de parcs éoliens en mer. Cette approche s’appuie sur un cas d’étude français, le site du futur parc éolien au large de...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00511/62273/66478.pdf

Demande de deuxième prolongation de l’ouverture du gisement naturel d’huîtres creuses à éclipse au sein de la zone 44.09 Estuaire Loire
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Piquet, Jean-come; Schmitt, Anne; Cochennec-laureau, Nathalie.
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00467/57845/79477.pdf

Assessment of the ecological status of Mediterranean French coastal waters as required by the Water Framework Directive using the Posidonia oceanica Rapid Easy Index: PREI
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gobert, Sylvie; Sartoretto, Stephane; Rico-raimondino, Valerie; Andral, Bruno; Chery, Aurelia; Lejeune, Pierre; Boissery, Pierre.
This paper describes the PREI (Posidonia oceanica Rapid Easy Index), a method used to assess the ecological status of seawater along Mediterranean French coasts. The PREI was drawn up according to the requirements of the Water Framework Directive (WFD 2000/60/EC) and was tested on 24 and 18 stations in PACA (Provence-Alpes-Cotes d'Azur) and Corsica, respectively. The PREI is based on five metrics: shoot density, shoot leaf surface area, E/L ratio (epiphytic biomass/leaf biomass), depth of lower limit, and type of this lower limit. The 42 studied stations were classified in the first four levels of status: high, good, moderate and poor. The PREI values ranged between 0.280 and 0.847; this classification is in accordance with our field knowledge and with our...
Tipo: Text
Palavras-chave: Water Frame Directive; Ecological Quality Ratio; Coastal water; Mediterranean Sea; Posidonia oceanica; Seagrass.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6949.pdf

Contamination des milieux aquatiques par les substances pharmaceutiques et cosmétiques - Etat des lieux et perspectives
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Collette-bregand, Maude; James, Alice; Munshy, Catherine; Bocquene, Gilles.
This document reports a survey of the aquatic contamination by cosmetics and medicinal products for human and veterinary uses. The contamination of the continental, estuary and coastal waters by these substances gives rise to questions on environmental risk assessment and management. Among the pharmaceutical classes involved, substances such as anti-inflammatory drugs, steroid hormones, antibiotics and hypolipemiants are of particular concern. Present regulations do not take into account the medical effluents in the environment. A significant part of these substances is not destroyed in water treatment plants whereas veterinary substances are directly spread in the environment. Some molecules occur in particularly high concentrations as shown for...
Tipo: Text
Palavras-chave: Médicaments; Produits pharmaceutiques; Vétérinaires; Cosmétiques; Émergents; Évaluation du risque environnemental; Risque chimique; Milieu marin; Pharmaceuticals; Ecotoxicity; Environmental risk assessment; Prioritization methods; Endocrine disruptors; Sewage; Sea water.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00066/17773/15295.pdf

Etude sur les possibilités de développement de la myticulture et de l'ostréiculture en Gaspésie et dans l'archipel des Iles de la Madeleine - Province du QUEBEC (Canada)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Trochon, M. P.
Tipo: Text
Ano: 1975
URL: http://archimer.ifremer.fr/doc/00045/15614/13018.pdf

Compte rendu de mission à Taïwan - Symposium Franco-Taïwanais sur la Biodiversité Marine, la pêche et l'aquaculture durables - Kaohsiung, 5-9 Juin 2006
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thouard, Emmanuel.
Une coopération scientifique de haut niveau existe depuis de nombreuses années entre l'Ifremer et de équipes de Taiwan. Les opérations correspondantes se sont limitées exclusivement, ces dernières années, au domaine des géosciences (Equipe de J. C. Sibuet). L'Ifremer a été approché officiellement, courant 2004, par les responsables scientifiques de la Représentation de Taipei à Paris afin d'évaluer les possibilités d'étendre cette coopération scientifique à d'autres domaines. Ces contacts se sont traduits par la signature, le 16 novembre 2005, au Siège de l'Ifremer, d'un accord-cadre de coopération scientifique entre l'Ifremer et le Conseil National des Sciences de Taiwan (National Science Council). Le NSC est la principale agence de financement de la...
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00305/41646/40855.pdf

Glorieuses 2009. Mission pluridisciplinaire Tortues / Aires Marines Protegees. Rapport de mission du 23 mai au 5 juin 2009. Mission Ifremer/Kelonia/Cnrs/Arvam/Aamp
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bourjea, Jerome; Benhamou, Simon; Mouquet, Pascal; Quod, Jean-pascal.
Les objectifs de la missions étaient les suivants:  Composante 1 « Tortue » : cette composante est divisée en deux volets : (i) Etude des Processus de navigation des tortues vertes dans le sud ouest de l'océan Indien. Sur la base de 12 tortues déplacées à 100 milles de leur plage de ponte, en direction du sud ouest, afin de disposer d'un point de lâcher éloigné des principales îles de la région (Comores, Mayotte, Madagascar, Seychelles), les processus de navigation et d’orientation en fonction du champs magnétique terrestre et des courants seront étudiées grâce à des balises Argos. Cette composante est très semblable au travail qui a été menée lors de la mission Glorieuses 2008. (ii) Importance des îles du Sud Ouest de l’océan Indien en tant qu’habitat de...
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00244/35517/34022.pdf

Note préliminaire sur l'anchois (Engraulis encrassicholus L.) du golfe de Gascogne.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Furnestln, Jean.
In his work about Clupeidae and Egraulidae, FAGE (1920) describes the European anchovy's main characters and differentiates two races: a Mediterranean race and an Atlantic one, with different biological and morphological characters. He also divides the Atlantic race into a northern group (North Sea) and a southern group (Bay of Biscay) "looking biologically similar, but distinguishing from each other through the constitution of their backbone". F. DE BUEN (1931) summarizes the works of the authors who have studied the European anchovy. Putting forward some statistics about fisheries in the Cantabrian Sea, he writes that, in the Bay of Biscay, anchovy is fished all year long, but the larger catches are from April to May, during the breeding period. ARNÉ...
Tipo: Text
Ano: 1943
URL: http://archimer.ifremer.fr/doc/1943/publication-3389.pdf

Etude de la diversité métabolique des micro-organismes des sources hydrothermales
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Byrne, Nathalie.
Since the discovery of oceanic hydrothermal vents, microbial diversity of this extreme environment was studied using both cultivation and molecular approaches. In this study the microbial diversity of active chimney from both TAG and Lucky Strike sites (Mid Atlantic Ridge) was investigated using both molecular survey and continuous enrichment culture in a bioreactor. To reproduce as close as possible environmental conditions the cultures were performed in oligotrophic conditions, in the presence of hydrogen and carbondioxide in the gas sweeping mix or using in situ sampled fluid/sea water mix as culture medium. The effect of environmental changes such as temperature and the absence or presence of sulphur was also investigated. Archaeal and Bacterial...
Tipo: Text
Palavras-chave: Culture; Molecular diversity; Metabolism; Hydrothermal vents; Microorganisms; Microbiology; Culture; Diversité moléculaire; Métabolisme; Sources hydrothermales; Micro organismes; Microbiologie.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/these-7295.pdf

Dragues à main de rivage à Tellines. Méditerranée (Hors Corse). 2018. Observation des Marées au débarquement - OBSDEB
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public. Ces indicateurs intègrent...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00596/70789/69023.pdf

Bio-economic management strategy evaluation of deepwater stocks using the FLBEIA model
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Garcia, Dorleta; Urtizberea, Agurtzane; Diez, Guzman; Gil, Juan; Marchal, Paul.
Deepwater fish are characterized by long lifespans, late maturity and low productivity. This implies slow recovery from low biomass levels and it is, therefore, important to manage these stocks correctly to avoid overfishing. However, these stocks are generally data poor, which it makes difficult to apply quantitative assessment models on which to base their management. The management strategy evaluation (MSE) approach consists in evaluating the performance of management strategies by simulation before their implementation. In the evaluation, the main sources of uncertainty in a fishery system and its management process should be taken into account in order to find robust management strategies. Thus, the MSE approach is relevant to the management of...
Tipo: Text
Palavras-chave: Bio-economic modelling; Deep-sea fisheries; Harvest control rules; Management strategy evaluation; Norway; Bay of Biscay; Gibraltar; Atlantic Ocean.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00176/28760/27231.pdf

Simulation of long equatorial waves in the pacific-ocean in relation with sea-level oscillations and zonal mean currents
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Brossier, F; Monier, L; Delecluse, P.
Wave-Like oscillations over a period of 30 days, with a wavelength of 1 000 to 1 200 km, have been observed in the Pacific Ocean between 2 degrees N and 4 degrees N. Eddies with the same time-space scale are present in the sea-level oscillations observed by satellites. A numerical modelling of these long equatorial waves is presented in this paper. Fluctuations of currents and density around given mean fields are computed by a cyclic perturbation model. The oceanic response has to fit given sea-level oscillations. Three sea-level data sets have been considered : one is deduced from Geosat altimetric measurements; the other two are analytically constructed, with random time-dependence. Three mean circulations have also been studied : no mean flow, and mean...
Tipo: Text
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00099/21031/18657.pdf

Response of the Mediterranean mean sea level to atmospheric pressure forcing
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Traon, Pierre-yves; Gauzelin, P.
The response of the Mediterranean mean sea level to atmospheric pressure forcing is analyzed using 3 years of TOPEX/POSEIDON data. Coherence analysis between mean sea level and atmospheric pressure shows a significant departure from a standard inverse barometer effect at frequencies higher than 30 days(-1). At high frequencies the phase difference between sea level and pressure is about 100 degrees, while it should be 180 degrees for a perfect inverse barometer response. This result is in agreement with previous findings and confirms the role of the Straits of Gibraltar and Sicily in limiting the water exchange (and thus the response to atmospheric pressure forcing) at high frequencies. The response of the Mediterranean mean sea level is then investigated...
Tipo: Text
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00079/19024/16607.pdf

Intégrité des habitats benthiques du plateau continental face aux perturbations physiques naturelles et aux arts trainants : quelles méthodes d'observations ? Comment suivre le retour vers un bon état écologique ?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Jac, Cyrielle.
In 2008, the European Union drew up the Marine Strategy Framework Directive (MSFD) with the aim of achieving Good Environmental Status of marine waters. By linking the changes observed to the pressures experienced, this directive is defined as a tool designed to better control environmental degradation factors and to assess their implications. Several descriptors are defined within the framework of MSFD, in particular descriptors 1 relating to the biological diversity of the seabed and 6 relating to the integrity of the seabed (i.e. the quality of its structures and functions). As dragging (trawling and dredging) is the main source of disturbance of continental shelf seabed, it is essential to study its impact. However, its effects depend on several...
Tipo: Text
Palavras-chave: Mégafaune benthique; Méthode d'échantillonnage; Impact de la pêche; Sensibilité; Facteurs environnementaux; Bon état écologique; Benthic megafauna; Sampling methods; Fishing impact; Sensitivity; Natural drivers; Good environmental status.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00679/79149/81655.pdf

Les modèles bio-économiques en halieutique : démarches et limites
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gilly, Bernard.
The bio-economic models in fishing : approaches and limits Bio-economic modelling technics for jisheries have been developed from the late jïfties. They are currently based on neo-classic economic therory. Their use has led to strong theoretical development in the Jield ofjsheries management, but they are utterly lacking qf pratical sense because the basic assumptions are not sujjïciently close to the reality. The main types of models are presented (statie and dynamic. determinist and random, simulation and optimisation) and their bounds are discussed.
Tipo: Text
Palavras-chave: Management; Models; Bio economy; Fisheries; SEM; Aménagement; Modéles; Bio économie; Pêcheries.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/publication-2517.pdf

Role of RadA and DNA Polymerases in Recombination-Associated DNA Synthesis in Hyperthermophilic Archaea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hogrel, Gaelle; Lu, Yang; Alexandre, Nicolas; Bossé, Audrey; Dulermo, Remi; Ishino, Sonoko; Ishino, Yoshizumi; Flament, Didier.
Among the three domains of life, the process of homologous recombination (HR) plays a central role in the repair of double-strand DNA breaks and the restart of stalled replication forks. Curiously, main protein actors involved in the HR process appear to be essential for hyperthermophilic Archaea raising interesting questions about the role of HR in replication and repair strategies of those Archaea living in extreme conditions. One key actor of this process is the recombinase RadA, which allows the homologous strand search and provides a DNA substrate required for following DNA synthesis and restoring genetic information. DNA polymerase operation after the strand exchange step is unclear in Archaea. Working with Pyrococcus abyssi proteins, here we show...
Tipo: Text
Palavras-chave: Homologous recombination; Archaea; DNA polymerase; Recombinase; DNA repair.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00641/75274/75539.pdf

Ultrasonic depolymerization of an exopolysaccharide produced by a bacterium isolated from a deep-sea hydrothermal vent polychaete annelid
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Petit, Anne-celine; Noiret, Nicolas; Guezennec, Jean; Gondrexon, N; Colliec-jouault, Sylvia.
Low frequency ultrasound was used to depolymerize a high-molecular-weight exopolysaccharide (EPS) produced by a deep-sea hydrothermal bacterium Alteromonas macleodii subsp. fijiensis biovar deepsane. The influence of several parameters was examined including the duration of ultrasonic irradiation, EPS concentration. reaction temperature and volume of the sonicated solution. With the aim of optimizing the depolyrnerization, the native EPS was simultaneously treated with hydrogen peroxide and ultrasound. This study identified the sonication conditions that produce low-molecular-weight derivatives from the native EPS (&gt;10(6) Da) with good reproducibility. (C) 2006 Elsevier B.V. All rights reserved.
Tipo: Text
Palavras-chave: Exopolysaccharide; Depolymerization; Ultrasound.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2123.pdf

Données préliminaires sur les résultats biologiques de la campagne Polymède I.Dragages profonds
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chardy, Pierre; Laubier, Lucien; Reyss, Daniel; Sibuet, Myriam.
Le problème de l'existence d'une véritable faune abyssale en Méditerranée est depuis longtemps posé et n'est pas encore résolu. On admet généralement qu'en raison de la structure homothermique des eaux profondes méditerranéennes, la plaine abyssale est peuplée par des espèces bathyales eurybathiques sténothermes chaudes, Mais, comme le souligne PÉRÈS [1967, p. 467] l'extrême pauvreté des grandes profondeurs méditerranéennes et le nombre très limité de prélèvements faits à ce jour ne permettent guère de donner une réponse satisfaisante à cette question. [OCR NON CONTRÔLE]
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1973
URL: http://archimer.ifremer.fr/doc/1973/publication-5023.pdf

Lignes à main. Guadeloupe. 2018. Observation des Marées au débarquement - OBSDEB.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: IFREMER. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public. Ces indicateurs intègrent...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00492/60335/63760.pdf

Interactions of surface and deep anticyclonic eddies in the Bay of Biscay
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Carton, Xavier; Le Cann, Bernard; Serpette, Alain; Dubert, Jesus.
In 1990, satellite observations revealed that an anticyclonic surface eddy (a SWODDY, for Slope Water Oceanic eDDY) followed a cycloidal trajectory north of the Iberian coast in the Bay of Biscay. To understand the mechanisms underlying such a trajectory, we study the evolution of an idealized surface eddy in a two-layer flat-bottom quasi-geostrophic model. The effect of several processes is studied, notably the presence of deep anticyclonic vorticity. This deep vorticity may result either from the tilting of the swoddy itself, or from the presence of an anticyclonic eddy of different origins, such as a meddy (Mediterranean Water EDDY). We also study the influence of a zonal coast south of the swoddy, via the "mirror effect". Firstly, a point-vortex model...
Tipo: Text
Palavras-chave: Bay of Biscay; Anticyclonic eddies; Swoddy; Meddy; Point vortex dynamics; Trajectory; Quasi-geostrophic model; In-situ observations.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00125/23589/21478.pdf

Triggering mechanisms of slope instability processes and sediment failures on continental margins: a geotechnical approach
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sultan, Nabil; Cochonat, Pierre; Canals, M; Cattaneo, Antonio; Dennielou, Bernard; Haflidason, H; Laberg, J; Long, D; Mienert, J; Trincardi, F; Urgeles, R; Vorren, T; Wilson, C.
The Costa target areas exhibit the variability of slope instabilities needed to improve our understanding of sediment physical and mechanical properties in areas prone to sliding. That is why in this project, we have analysed the different slope failures events from different parts of the Costa target areas, which reflect diverse triggering mechanisms. The aim of the first part of this study was to identify the geotechnical response of the sediment to different external mechanisms (earthquake, rapid sedimentation and gas hydrate melting). We have focused on the relation between external mechanisms and the consequence change in the in-situ stress state and the physical, mechanical, and elastic properties of the sediment. In the second part of the paper, the...
Tipo: Text
Palavras-chave: Slope instability; Sensitivity; Sedimentation; Hydrate; Earthquake.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-700.pdf

Lake Bourget regional erosion patterns reconstruction reveals Holocene NW European Alps soil evolution and paleohydrology
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Arnaud, Fabien; Revillon, Sidonie; Debret, Maxime; Revel, Marie; Chapron, Emmanuel; Jacob, Jeremy; Giguet-covex, Charline; Poulenard, Jerome; Magny, Michel.
Two well-dated ca Holocene-long sedimentary sequences from deepest parts of Lake Bourget provide new insights onto the evolution of erosion patterns at a regional scale in NW European Alps. The combination of high resolution geochemistry - XRF core scanning, calibrated by 150 punctual measurements - and isotope geochemistry (epsilon Nd) of the terrigenous fraction permitted the reconstruction not only of the intensity, but also the type (physical erosion vs. chemical weathering) and the location (Prealpine massifs vs. High Crystalline massifs) of dominant erosion processes. Those data point the persistency of weak erosion fluxes from 9600 to 5500 cal. BP due both to a dry climate and the growing sheltering effect of soils that rapidly progressed between...
Tipo: Text
Palavras-chave: Holocene; Alps; Erosion; Soil dynamics; Paleohydrology.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00106/21723/20064.pdf

A bioeconomic analysis of the impact of decommissioning programs: Application to a limited-entry french scallop fishery
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guyader, Olivier; Daures, Fabienne; Fifas, Spyros.
The objective of this paper is to assess the benefits and costs of decommissioning policies aimed at reducing fleet capacity through premiums offered by the public authority to fishermen to scrap their vessels. A case study, the limited entry scallop fishery of the Saint Brieuc Bay, France, is used to con- sider the problem of excess capacity and to model the bioeconomic consequences of disinvestment behavior. Special attention is paid to the assessment of fishermen's willingness to leave the fishery and to the implementation of public policy in terms of budget level and premiums offered to the fishermen. Spreadsheet simulations show that the impact of decommissioning programs is positive in terms of net surplus, even in the case of increasing technical...
Tipo: Text
Palavras-chave: Fishing capacity; Decommissioning programs; Premium; Willingness to leave; Bioeconomic model; Cost-benefit analysis.
Ano: 2004
URL: https://archimer.ifremer.fr/doc/00243/35449/33977.pdf

Sample collection protocol for the extraction of female gonads in the megrim (Lepidorhombus spp.) for maturity staging through histology
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sauger, Carine; Quinquis, Jerome; Dubroca, Laurent; Parrad, Sophie; Kellner, Kristell; Heude-berthelin, Clothilde.
This protocol was established during project MATO (MATurité Objective des poissons par l’histologie quantitative) for the evaluation of sexual maturity of exploited stock species, as well as to harmonize the sampling process of gonad extraction before the mounting between slide and slip of the gonad sections. This document follows the work of different workshops that aimed to improve the compilation of data on sexual maturity. The WKMATCH (WorKshop for MATurity staging CHairs, 2012) defined a universal evaluation grid for sexual maturity staging of different species. During this workshop, two main recommendations were made, underlining the need to improve and complete the knowledge on sexual maturity, as well as to harmonize the practices used to determine...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00595/70724/69144.pdf

Suitable habitats of fish species in the Barents Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Husson, Berengere; Certain, Gregoire; Filin, Anatoly; Planque, Benjamin.
Many marine species are shifting their distribution poleward in response to climate change. The Barents Sea, as a doorstep to the fast-warming Arctic, is experiencing large scale changes in its environment and its communities. This paper aims at understanding what environmental predictors limit fish species habitats in the Barents Sea and discuss their possible evolution in response to the warming of the Arctic. Species distribution models usually aim at predicting the probability of presence or the average abundance of a species, conditional on environmental drivers. A complementary approach is to determine suitable habitats by modelling the upper limit of a species’ response to environmental factors. Using quantile regressions, we model the upper limit...
Tipo: Text
Palavras-chave: Quantile regression; Habitat suitability models; Climate change; Species distribution; Species shifts; Environmental drivers.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00605/71682/70120.pdf

Effets climatiques sur les écosystèmes marins. Exemple du recrutement des Crustacés Cirripèdes sur la côte ouest du Cotentin
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dreves, Luc.
A nuclear power plant is set up at Flamanville (Channel; West coast of the Cotentin). For monitoring studies, one species (or a group of species) has been chosen in each major unit for a reference population dynamics study. Hard bottoms are covered by several species of barnacles. These species present different temperature affinities, and have reached here an equilibrium stage. The recruitment period of Balanus balanoides, the main species, has been determined. A relationship is established between the wintry temperature and the numerical importance of its spring recruitment.
Tipo: Text
Palavras-chave: Centrale nucléaire; Flamanville; Surveillance; Crustacés cirripèdes; Balanus balanoides; Recrutement; Flamanville; Monitoring; Nuclear power plant; Balanus balanoides; Barnacles; Recruitment.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00396/50759/51472.pdf

Assessment of biochemical methods to detect enzymatic depolymerization of polysaccharides
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rigouin, Coraline; Delbarre Ladrat, Christine; Sinquin, Corinne; Colliec-jouault, Sylvia; Dion, M.
To find biocatalyst allowing depolymerization of new polysaccharides, one needs to get a sensitive and well adapted method to a screening program. This led us to compare biochemical methods of detection of the depolymerization. Currently used methods such as reducing sugars assays, double bond monitoring or molecular weight determination were tested to follow the kinetic of depolymerization with different enzyme / polysaccharide couples. The range of concentrations of assorted enzymes allowed us to identify the most sensitive and appropriate method to detect polysaccharide degradation. Reducing sugars assays are quantitative, sensitive and almost usable with all kind of polysaccharide but some compounds may interfere with them. When polysaccharide is...
Tipo: Text
Palavras-chave: Detection; Enzyme; Depolymerization; Carbohydrate.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2008/publication-4723.pdf

Pollutant effects on Pacific oyster, Crassostrea gigas (Thunberg), hemocytes: Screening of 23 molecules using flow cytometry
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gagnaire, Beatrice; Thomas Guyon, H; Burgeot, Thierry; Renault, Tristan.
The shellfish industry is an important economic activity in France, occurring mostly in estuarine zones subject to pollution due to anthropogenic activities. The harmful effects of pollutants on species inhabiting these estuarine zones are not well known. Among marine species, bivalve mollusks---particularly Pacific oyster, Crassostrea gigas-may serve a model of interest. The species is sedentary and filter-feeding, which favors bioaccumulation of pollutants in their tissues. Oysters may be suitable for studies on disturbance by pollutants of physiological activities, among which defense mechanisms are poorly documented in bivalves. In this study, effects of pollutants on hemocyte functions were monitored in Pacific oyster, C. gigas. Hemocytes were exposed...
Tipo: Text
Palavras-chave: Toxicity; Pesticides; PCBs; PAHs; Crassostrea gigas; Pacific oyster; Hemocytes; Flow cytometry; Cellular activities.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1695.pdf

Culture-Facilitated Comparative Genomics of the Facultative Symbiont Hamiltonella defensa
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chevignon, Germain; Boyd, Bret M.; Brandt, Jayce W.; Oliver, Kerry M.; Strand, Michael R.
Many insects host facultative, bacterial symbionts that confer conditional fitness benefits to their hosts. Hamiltonella defensa is a common facultative symbiont of aphids that provides protection against parasitoid wasps. Protection levels vary among strains of H. defensa that are also differentially infected by bacteriophages named APSEs. However, little is known about trait variation among strains because only one isolate has been fully sequenced. Generating complete genomes for facultative symbionts is hindered by relatively large genome sizes but low abundances in hosts like aphids that are very small. Here, we took advantage of methods for culturing H. defensa outside of aphids to generate complete genomes and transcriptome data for four strains of...
Tipo: Text
Palavras-chave: Insect; Aphid; Bacteria; Comparative genomics; Parasitoid; Defense.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00635/74665/74590.pdf

Are growth and density quantitative indicators of essential fish habitat quality? An application to the common sole Solea solea nursery grounds
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gilliers, Camille; Le Pape, Olivier; Desaunay, Yves; Morin, Jocelyne; Guerault, Daniel; Amara, Rachid.
Bio-indicators were measured on juvenile fish to assess the quality of eight coastal and estuarine nursery grounds in the Eastern English Channel and in the Bay of Biscay during 3 years. Growth (size and otolith daily increment width), body condition (morphometric index) and abundance of juvenile common soles were analysed together with xenobiotic concentrations (heavy metals and organic contaminants).   Condition indices displayed important variations and did not allow relevant estimation of environmental quality. On the contrary, growth and density indicators showed good steadiness above years but varied among sites. In spite of difficulties of interpreting these indicators on such a meso-scale approach, analyses highlighted the estuaries of Seine and...
Tipo: Text
Palavras-chave: Flatfish juvenile; Essential fish habitat quality; Quantitative bio indicators.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2016.pdf

Campagne IPHIS - IMAGES Ill / MD 106 du 23-05-97 au 28-06-97
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Beaufort, Luc; Chen, Min-te; Chivas, Allan; Manighetti, Barbara.
Tipo: Text
Ano: 1997
URL: https://archimer.ifremer.fr/doc/00629/74140/73668.pdf

Études méthodologiques développées à l'échelle nationale. Livrable 1 – Confiance et précision pour l'indicateur M-AMBI
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Brun, Mélanie.
The index used by France to assess the quality of coastal water bodies of the Water Framework Directive (WFD), for the Channel-Atlantic coast and for the quality element "soft substratum benthic invertebrates" is the M-AMBI. In their work, Sigovini et al. (2013) compare several methods of calculating M-AMBI and alternative indices with the values of M-AMBI. Their results show strong correlations between the values of the M-AMBI and those of the proposed alternatives. In a first step, the present work aims to compare M-AMBI values, obtained during the application of the assessment procedure of the quality of coastal water bodies for the Channel-Atlantic coast on the 2007 and 2010 data, with the values obtained for various alternative calculations and...
Tipo: Text
Palavras-chave: M-AMBI; Richesse; Indice de Shannon-Weaver; AMBI; Analyse factorielle; Directive Cadre sur l’Eau; Contrôles de surveillance 2007 et 2010; Standardisation; Bootstrap; Invertébrés benthiques; Manche-Atlantique; M-AMBI; Richness; Shannon-Weaver index; AMBI; Factor analysis; Water Framework Directive; Monitoring 2007 and 2010; Standardization; Bootstrap; Benthic invertebrates; Channel-Atlantic coast.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00333/44394/44025.pdf

Angiospermes des côtes françaises Manche-Atlantique. Propositions pour un indicateur DCE et premières estimations de la qualité
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Auby, Isabelle; Oger-jeanneret, Helene; Sauriau, Pierre-guy; Hily, Christian; Barille, Laurent.
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00032/14358/11646.pdf

Revised chronology for late Pleistocene Mono Lake sediments based on paleointensity correlation to the global reference curve
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Zimmerman, Susan H.; Hemming, Sidney R.; Kent, Dennis V.; Searle, Stephanie Y.
Lakes are highly sensitive recorders of climate processes, but are extremely difficult to correlate precisely to ice-core and marine records, especially in the absence of reliable radiocarbon dates. Relative paleointensity (RPI) of Earth's magnetic field is an independent method of correlating high-resolution climate records, and can be applied to both marine and terrestrial sediments, as well as (inversely) correlated to the cosmogenic nuclide records preserved in ice cores. Here we present the correlation of an RPI record from Mono Lake, California to GLOPIS, the Global PaleoIntensity Stack, which increases the age estimation of the basal Mono Lake sediments by &gt; 20000 yr (20 kyr), from similar to 40 ka (kyr before present) to 67 ka. The Mono Lake...
Tipo: Text
Palavras-chave: Paleointensity; GLOPIS; Argon; Great Basin; Mono Lake excursion; Laschamp.
Ano: 2006
URL: https://archimer.ifremer.fr/doc/00234/34500/33454.pdf

Mathematical methods in oceanography. Deterministic and stochastic aspects - MATHOCEAN
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Durbec, Jp.
Tipo: Text
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00322/43336/42891.pdf

Surveillance du milieu marin et protection sanitaire des coquillages (Acte)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Renault, Tristan.
Les mollusques sont à la base d'une activité économique importante au sein de l'Union Européenne, la France étant un des premiers pays producteurs. La conchyliculture doit répondre aujourd'hui aux attentes de la société en termes de sécurité alimentaire. Des réglementations ont ainsi été établies, tao! au niveau des étapes primaires de pêche, d'élevage ou de récolte des mollusques, que lors de la transformation et de la commercialisation. Au cours des étapes de production et de récolte, une contamination des coquillages (toxines algales, agents infectieux ou polluants) peut survenir du fait, notamment, des conditions environnementales auxquelles sont confrontés les animaux. Des réseaux de surveillance ont ainsi été développés afin de détecter la présence...
Tipo: Text
Palavras-chave: Polluants; Contamination microbiologique; Algues toxiques; Coquillages; Milieu marin; Réseaux; Surveillance.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/acte-6933.pdf

Description mathématique de la croissance de Lesueurigobius friesii (Teleostei, Gobiidae). Essai de synthèse
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gros, Philippe.
A population of the burrowing goby Lesueurigobius friesii was studied from 1974 to 1979, at a sampling station located on a Nephrops ground in the northem Bay of Biscay, off the south coast ofBrittany; samples were collected close to a muddy bottom, at depths ranging from 80 to 100 m. Data on demographie structures were obtained by two independent exercises: examination of oto1iths and the analysis of length-frequency distributions. The fish attains a standard length of at !east 71 mm and an age of 6 years. Most growth takes place during the first three years of !ife, and proceeds very slowly thereafter. The state of gonad development was assessed qualitatively by visual inspection of the body cavity of females; spawning occurs in spring, and by July 61 of...
Tipo: Text
Palavras-chave: Croissance; Modèle de Von Bertalanffy; Comparaison de courbes de croissance; Téléostéens; Golfe de Gascogne; Growth; Von Bertalanffy's model; Comparison of growth curves; Teleostei; Bay of Biscay.
Ano: 1980
URL: http://archimer.ifremer.fr/doc/00122/23302/21129.pdf

SKIM, a Candidate Satellite Mission Exploring Global Ocean Currents and Waves
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ardhuin, Fabrice; Brandt, Peter; Gaultier, Lucile; Donlon, Craig; Battaglia, Alessandro; Boy, François; Casal, Tania; Chapron, Bertrand; Collard, Fabrice; Cravatte, Sophie; Delouis, Jean Marc; De Witte, Erik; Dibarboure, Gerald; Engen, Geir; Johnsen, Harald; Lique, Camille; Lopez-dekker, Paco; Maes, Christophe; Martin, Adrien; Marié, Louis; Menemenlis, Dimitris; Nouguier, Frederic; Peureux, Charles; Rampal, Pierre; Ressler, Gerhard; Rio, Marie-helene; Rommen, Bjorn; Shutler, Jamie D.; Suess, Martin; Tsamados, Michel; Ubelmann, Clement; Van Sebille, Erik; Van Den Oever, Martin; Stammer, Detlef.
The Sea surface KInematics Multiscale monitoring (SKIM) satellite mission is designed to explore ocean surface current and waves. This includes tropical currents, notably the poorly known patterns of divergence and their impact on the ocean heat budget, and monitoring of the emerging Arctic up to 82.5°N. SKIM will also make unprecedented direct measurements of strong currents, from boundary currents to the Antarctic circumpolar current, and their interaction with ocean waves with expected impacts on air-sea fluxes and extreme waves. For the first time, SKIM will directly measure the ocean surface current vector from space. The main instrument on SKIM is a Ka-band conically scanning, multi-beam Doppler radar altimeter/wave scatterometer that includes a...
Tipo: Text
Palavras-chave: Ocean current; Tropics; Arctic; Doppler; Altimetry; Sea state; Remote sensing; Ocean waves.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00498/60964/64372.pdf

Phenomenal sea states and swell from a North Atlantic Storm in February 2011: a comprehensive analysis
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hanafin, Jennifer; Quilfen, Yves; Ardhuin, Fabrice; Sienkiewicz, Joseph; Queffeulou, Pierre; Obrebski, Mathias; Chapron, Bertrand; Reul, Nicolas; Collard, Fabrice; Corman, David; De Azevedo, Eduardo B.; Vandemark, Doug; Stutzmann, Eleonore.
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00094/20538/18197.pdf

Direct assessment of small pelagic fish by the PELGAS10 acoustic survey
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Masse, Jacques; Duhamel, Erwan.
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00025/13640/10722.pdf

Species-Specific Antioxidant Power and Bioactive Properties of the Extracts Obtained from Wild Mediterranean Calendula Spp. (Asteraceae)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Messina, Concetta Maria; Troia, Angelo; Arena, Rosaria; Manuguerra, Simona; Ioannou, Theodora; Curcuraci, Eleonora; Renda, Giuseppe; Hellio, Claire; Santulli, Andrea.
n this study we focused on four taxa of the genus Calendula (C. maritima, C. suffruticosa subsp. fulgida, C. arvensis, and the hybrid between the first two ones), collected in Mediterranean area (Sicily). Six extracts for each species were obtained using solvents with increasing polarity (hexane, ethanol 80%, acetone 70%, and water) and through extraction by supercritical fluids (SFE). It has been observed that the solvent with the highest extraction efficiency was ethanol 80% for all species. However, SFE extracts showed high antioxidant activity comparable to the ethanol 80% extract (polyphenol, DPPH, and reducing power method). These findings were confirmed by in vitro analysis (MTT assay) where it was observed that the tested concentration (24 µg/mL),...
Tipo: Text
Palavras-chave: Calendula species; Marigold; Supercritical fluid extraction; Bioactivity; Antioxidants; Polyphenols.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00591/70336/68389.pdf

Dynamique des populations marines exploitées. Tome 1. Concepts et modèles
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Laurec, Alain; Le Guen, Jean-claude.
This book constitutes the first of a series of three volumes, the purpose of which is to cover the principal methods used in fish population dynamics. It is devoted to the definition of the main concepts, ami the presentation of the usual mathematical models. The second volume will deal with the fitting of the models, and the estimation of parameters. The third will be devoted to sampling problems. These volumes will be recollections of communications presented during ad hoc seminars, hold in Brest (GSG/COB) in 1980 and 1981. The first part deals with the basic concepts related to the two components whose relationship is being described by the population dynamics, namely the fish stock, to its relations with biological populations, and to the partition of...
Tipo: Text
Palavras-chave: Pêche; Conservation de la ressource; Modèle mathématique; Dynamique des populations; Gestion de stock; Resource conservation; Mathematical models; Fishery resources; Stock assessment; Population dynamics.
Ano: 1981
URL: https://archimer.ifremer.fr/doc/1981/rapport-1126.pdf

Detection and distribution of ostreid herpesvirus 1 in experimentally infected Pacific oyster spat
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Segarra, Amelie; Baillon, Laury; Faury, Nicole; Tourbiez, Delphine; Renault, Tristan.
High mortality rates are reported in spat and larvae of Pacific oyster Crassostrea gigas and associated with ostreid herpesvirus 1 (OsHV-1) detection in France. Although the viral infection has been experimentally reproduced in oyster larvae and spat, little knowledge is currently available concerning the viral entry and its distribution in organs and tissues. This study compares OsHV-1 DNA and RNA detection and localization in experimentally infected oysters using two virus doses: a low dose that did not induce any mortality and a high dose inducing high mortality. Real time PCR demonstrated significant differences in terms of viral DNA amounts between the two virus doses. RNA transcripts were detected in oysters receiving the highest dose of viral...
Tipo: Text
Palavras-chave: Crassostrea gigas; In situ hybridization; Ostreid herpesvirus 1; Viral DNA; Viral RNA.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00300/41099/40272.pdf

Evaluation et caractérisation de la matière en suspension dans la colonne d'eau, après filtration différentielle, au cours d'un cycle mortes eaux - vives eaux (bassin de Marennes-Oléron: Chapus mai-juin 1993)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Jamoneau, Christophe.
Mon stage s'est déroulé du 19 avril 1993 au 25 juin 1993 au sein de l'Unité de Recherche des Ecosystèmes Aquacoles (laboratoire U .R.EA.) de la station IFREMER basée à La Tremblade. Premier bassin ostréicole français, Marennes-Oléron est un écosystème complexe dont la compréhension nécessite la mise en place d'études multidisciplinaires intégrées. Ainsi, au cours de ces 10 semaines de stage, j'ai étudié la colonne d'eau (évaluation et caractérisation de la matière en suspension) sur le site du Chapus. Etant arrivé une semaine avant le début de la manipulation, j'ai eu l'opportunité de participer à la totalité de l'expérience ainsi qu'à l'interprétation d'une partie des résultats. La première semaine fut consacrée à la mise en place du protocole et à la...
Tipo: Text
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00411/52253/52984.pdf

Do FADs influence the geographical distribution of dolphinfish (Coryphaena hippurus)?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Taquet, Marc; Reynal, Lionel; Laurans, Martial.
For most fisheries, increasing the local production of pelagic fish is the main objective of Fish Aggregating Devices (fads). This does not rule out the existence of a larger-scale impact, especially on the migratory behaviour of fish. The analysis of data collected during 25 experimental fishing surveys around Martinique between 1995 and 1997 has led to the hypothesis that fads influence the migratory behaviour of young dolphinfish. Unlike recent studies of dolphinfish migration in the Caribbean, which tend to show an annual migration pattern with a seasonal passage through the French West Indies, the experimental fishing surveys done over more than a year on a monthly basis on a single cohort, show that the migratory pattern of part of the regional stock...
Tipo: Text
Palavras-chave: Attracting techniques; Geographical distribution; Migrations; Migratory species; Pelagic fisheries; Tuna fisheries; Coryphaena hippurus.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00042/15321/12635.pdf

Filets à Rougets. Provence-Alpes-Côte d'Azur. 2018. Observation des Marées au débarquement - OBSDEB
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer. Système d'Informations Halieutiques.
Ce document est réalisé dans le cadre du projet « Système d'Informations Halieutiques » (SIH) de l'Ifremer, qui constitue le réseau d'observation des ressources halieutiques et des usages associés. Ce projet s'inscrit dans la mission de service d'intérêt public de l'Ifremer consistant à « connaître, évaluer et mettre en valeur les ressources des océans et permettre leur exploitation durable ». Outre la collecte des données pertinentes permettant l'analyse du secteur des pêches, le SIH a en charge l'élaboration d'indicateurs sur les flottilles de pêche et leur restitution sous forme de synthèses aux différents acteurs de la filière pêche (depuis la recherche jusqu'aux professionnels et gestionnaires) et du grand public. Ces indicateurs intègrent...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00597/70899/69132.pdf

Projet d'elevage du loup en mer : etude technico-economique du pregrossissement et du grossissement
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tanguy, Renan; Le Grel, Laurent.
After 12 years of a difficult start, the sea bass (Dicentrarchus labrax) breeding projects are multiplying. Faced with the constraints presented by the sites used in the past, farming at sea seems to offer conditions more conducive to the growth and survival of the animals. The zootechnical data from the farm makes it possible to link the rate of growth and the thermal profile of the site. Risks and uncertainties still weigh heavily on aquafarming projects, but solutions such as insurance are helping to improve their economic feasibility. The economic and financial analysis comes up with good overall profitability of the project, even if the duration of the breeding cycle and the necessity to ensure a progressive increase in operating capacity make the...
Tipo: Text
Palavras-chave: Grossissement; Prégrossissement; Loup; Aquaculture; SEM.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/rapport-2417.pdf

Bilan provisoire des expériences de grossissement en palourdes (V. semidecussata) dans l'étang de Kermoor
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Flassch, Jean-pierre; Robin, J.
Ce rapport fait état d'un bilan provisoire des expériences de grossissement de palourdes, V. semidecussata, réalisées à l'Ide Tudy en 1977.
Tipo: Text
Palavras-chave: Elevage palourde; V. semidecussata; Grossissement; Ile Tudy.
Ano: 1978
URL: http://archimer.ifremer.fr/doc/00165/27642/25790.pdf

Impact of essential fatty acid deficiency and temperature on tissues' fatty acid composition of European sea bass (Dicentrarchus labrax)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Skalli, Ali; Robin, Jean; Le Bayon, Nicolas; Le Delliou, Herve; Person, Jeannine.
The effects of essential fatty acid deficiency and temperature on the fatty acid profiles of polar lipids (PL) and neutral lipids (NL) from various tissues (muscle, liver, gills, eyes and brain) of European sea bass juveniles were compared in a two factorial design. Fish (60 g) were held for 84 days at 22 or 29 C (upper limit for growth) and fed either at a lower or a higher level than n-3 HUFA minimal requirement for growth (0.4% and 2.2% n-3 HUFA dry matter for diets LD and HD, respectively). Essential fatty acid deficiency had a major influence on fatty acids in NL fraction of all tissues, a more moderate influence on PL of muscle, liver and gills, while a low and very low diet influence was observed on eyes and brain PL fatty acid content,...
Tipo: Text
Palavras-chave: Tissue fatty acid composition; Temperature; N 3 HUFA; European sea bass.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1688.pdf

Chemicals sorbed to environmental microplastics are toxic to early life stages of aquatic organisms
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cormier, Bettie; Gambardella, Chiara; Tato, Tania; Perdriat, Quentin; Costa, Elisa; Veclin, Cloé; Le Bihanic, Florane; Grassl, Bruno; Dubocq, Florian; Kärrman, Anna; Van Arkel, Kim; Lemoine, Soazig; Lagarde, Fabienne; Morin, Benedicte; Garaventa, Francesca; Faimali, Marco; Cousin, Xavier; Bégout, Marie-laure; Beiras, Ricardo; Cachot, Jerome.
Microplastics are ubiquitous in aquatic ecosystems, but little information is currently available on the dangers and risks to living organisms. In order to assess the ecotoxicity of environmental microplastics (MPs), samples were collected from the beaches of two islands in the Guadeloupe archipelago, Petit-Bourg (PB) located on the main island of Guadeloupe and Marie-Galante (MG) on the second island of the archipelago. These samples have a similar polymer composition with mainly polyethylene (PE) and polypropylene (PP). However, these two samples are very dissimilar with regard to their contamination profile and their toxicity. MPs from MG contain more lead, cadmium and organochlorine compounds while those from PB have higher levels of copper, zinc and...
Tipo: Text
Palavras-chave: Environmental microplastics; Leachates; Early life stages; Aquatic organisms; Toxicity.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00661/77276/78711.pdf

Réseau Hydrologique Littoral Normand (RHLN) - Suivi 2009
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Nedelec, Florence; Lejolivet, Aurore; Riou, Philippe.
Le Réseau Hydrologique Littoral Normand (RHLN) pérenne a été approuvé en 2007 par ses partenaires, avec le triple objectif (1) de maintenir le suivi de la qualité des masses d’eau et évaluer leur niveau d’eutrophisation en réponse aux réglementations (Directive Nitrate, OSPAR, DCE), (2) de poursuivre la réflexion sur la définition des indicateurs DCE, puis (3) de développer les connaissances et de fournir des données à la modélisation. Ce rapport réalise la synthèse des résultats obtenus en 2009, deuxième année de la mise en oeuvre du RHLN pérenne. L’analyse des cycles hydrologiques observés au sein des différentes masses d’eau normandes en 2009 a permis de mettre en évidence le caractère plus « sec » du point de vue météorologique par rapport à l’année...
Tipo: Text
Palavras-chave: Ecosystème côtier; Hydrologie; Normandie; Baie de Seine; Eutrophisation; DCE; Phytoplancton; Réseau hydrologique; RHLN.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00051/16178/13663.pdf

Multimission empirical ocean tide modeling for shallow waters and polar seas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cheng, Yongcun; Andersen, Ole Baltazar.
A new global ocean tide model named DTU10 (developed at Technical University of Denmark) representing all major diurnal and semidiurnal tidal constituents is proposed based on an empirical correction to the global tide model FES2004 (Finite Element Solutions), with residual tides determined using the response method. The improvements are achieved by introducing 4 years of TOPEX-Jason 1 interleaved mission into existing 18 years (1993-2010) of primary joint TOPEX, Jason 1, and Jason 2 mission time series. Hereby the spatial distribution of observations are doubled and satellite altimetry should be able to recover twice the spatial variations of the tidal signal which is particularly important in shallow waters where the spatial scale of the tidal signal is...
Tipo: Text
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00489/60026/63289.pdf

Le chalutage au large des côtes nord-ouest africaines - Résultats des campagnes de la "Thalassa"
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Maurin, Cl; Bonnet, Marc.
Pendant l'année 1962, du 6 novembre au 12 décembre, la "Thalassa" effectuait une mission de prospection et d'étude des fonds le long des côtes du Rio de Oro et de Mauritanie ; 63 opérations de pêche étaient réalisées à cette occasion. Etant donné l'intense effort déployé dans cette région au cours de ces cinq dernières années par les navires d'un grand nombre de nations, il était particulièrement utile de vérifier l'exactitude des données recueillies sur le rendement à cette époque. Il convenait également de compléter ces données par de nouvelles observations. Dans ce but le navire de recherches de l'Institut des Pêches effectuait 42 autres chalutages du 29 mars au 18 avril 1968 en étendant sa zone d'action jusqu'à la fosse de Cayar, près du cap Vert, au...
Tipo: Text
Ano: 1969
URL: http://archimer.ifremer.fr/doc/1969/publication-7287.pdf

Premiers bilans de production organique et de calcification d'un récif-barrière de la Polynésie Française
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sournia, A; Delesalle, B; Ricard, M.
Tipo: Text
Ano: 1981
URL: http://archimer.ifremer.fr/doc/00121/23250/21081.pdf

Suivi de la population de homards et des espèces associées d’intérêt halieutique dans l’archipel de Chausey et détermination du rôle du cantonnement
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Schlaich, Ivan.
La ressource en crustacés, notamment le homard, espèce emblématique parmi toutes, qui trouve dans les cavités des zones rocheuses des habitats favorables, est importante dans l’Ouest Cotentin.   Afin de protéger cette ressource, des cantonnements à crustacés ont été mis en place dès les années 60 à l’initiative des professionnels de la mer. Ces outils fournissent des refuges à de nombreuses espèces exploitées ou non qui peuvent y trouver des habitats non impactés par la pêche. En général, à l'intérieur de ces zones, l’abondance des populations et la taille des individus augmentent, renforçant ainsi leur potentiel reproducteur. A partir d’un moment, cette concentration d’individus dans une zone réduite entraîne des mouvements d'individus et de dispersion...
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00363/47377/47372.pdf

Surveillance écologique et halieutique. Site de Gravelines. Novembre 1987 - Octobre 1988
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Delesmont, E; Delesmont, Régis; Delattre, J.m.; Grossel, Hubert; Le Fevre-lehoerff, Geneviève; Woehrling, Daniel; Martin, Jocelyne; Tetard, Alain; Dewarumez, Jean-marie; Menu, D.
Pendant la période Novembre 1987 - Octobre 1988, l'échauffement de l'eau dans le canal de rejet est équivalent à la période précédente (+ 8°C à + 8.5°C): Le taux de recyclage de l'eau calculé par rapport au bromoforme est de 4.3 %. Le bromoforme présente une valeur moyenne de 14 llg/1. La concentration moyenne annuelle de vibrions est 100 fois plus élevée au rejet qu'à la prise d'eau. La destruction de la biomasse chlorophyllienne due au transit est voisine de 50 % et celle de la biomasse zooplanctonique exprimée en carbone est d'environ 40 %. En 1988, les conditions météorologiques ont été favorables à la prolifération des Phaeocystis puis des noctiluques dans un milieu très eutrophisé. L'évolution des niveaux supérieurs de l'estran se confirme cette...
Tipo: Text
Palavras-chave: Gravelines; Centrale nucléaire; Ecologie; Milieu marin; Gravelines; Nuclear power plant; Ecology; Marine environnent.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00005/11601/8237.pdf

Projecting changes in the distribution and productivity of living marine resources: A critical review of the suite of modeling approaches used in the large European project VECTORS
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Peck, Myron A.; Arvanitidis, Christos; Butenschon, Momme; Canu, Donata Melaku; Chatzinikolaou, Eva; Cucco, Andrea; Domenici, Paolo; Fernandes, Jose A.; Gasche, Loic; Huebert, Klaus B.; Hufnagl, Marc; Jones, Miranda C.; Kempf, Alexander; Keyl, Friedemann; Maar, Marie; Mahevas, Stephanie; Marchal, Paul; Nicolas, Delphine; Pinnegar, John K.; Rivot, Etienne; Rochette, Sebastien; Sell, Anne F.; Sinerchia, Matteo; Solidoro, Cosimo; Somerfield, Paul J.; Teal, Lorna R.; Travers-trolet, Morgane; Van De Wolfshaar, Karen E.
We review and compare four broad categories of spatially-explicit modelling approaches currently used to understand and project changes in the distribution and productivity of living marine resources including: 1) statistical species distribution models, 2) physiology-based, biophysical models of single life stages or the whole life cycle of species, 3) food web models, and 4) end-to-end models. Single pressures are rare and, in the future, models must be able to examine multiple factors affecting living marine resources such as interactions between: i) climate-driven changes in temperature regimes and acidification, ii) reductions in water quality due to eutrophication, iii) the introduction of alien invasive species, and/or iv) (over-)exploitation by...
Tipo: Text
Palavras-chave: Distribution; Modelling; Habitat; Resources; Man-induced effects.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00337/44845/44436.pdf

Hydrodynamic characterization of the Arcachon Bay, using model-derived descriptors
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Plus, Martin; Dumas, Franck; Stanisiere, Jean-yves; Maurer, Daniele.
A numerical model (MARS-2D) was developed, with the aim of describing the hydrodynamics that prevail in Arcachon Bay. Direct model results as well as derived mixing and transport time-scales (tidal prism, local and integrated flushing times, age of water masses), were used to understand the behaviour of water masses and exchanges between the Bay and its frontiers. Particular attention was paid to the processes that drive the hydrodynamics (tides, wind and rivers), in order to understand their respective influence. The Arcachon Bay hydrodynamic system appears primarily to be highly influenced by tides; secondarily, by winds. About two third of the lagoon total volume is flushed in and out at each tidal cycle, which represent a mean tidal prism of 384...
Tipo: Text
Palavras-chave: Arcachon Bay; Tracer; Age of seawater; Flushing time; Tidal prism; Residual fluxes; Hydrodynamics.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6424.pdf

Spatiotemporal dynamics of submerged macrophyte status and watershed exploitation in a Mediterranean coastal lagoon: Understanding critical factors in ecosystem degradation and restoration
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pasqualini, Vanina; Derolez, Valerie; Garrido, Marie; Orsoni, Valerie; Baldi, Yoann; Etourneau, Sabrina; Leoni, Vanina; Rebillout, Patrick; Laugier, Thierry; Souchu, Philippe; Malet, Nathalie.
Increases in the intensity of disturbances in coastal lagoons can lead to shifts in vegetation from aquatic angiosperms to macroalgal or phytoplankton communities. Such abrupt and discontinuous responses are facilitated by instability in the equilibrium controlling the trajectory of the community response. We hypothesized that the shift in macrophyte populations is reversible, and that this reversibility is dependent on changes in the pressures exerted on the watershed and lagoon functioning. Biguglia lagoon (Mediterranean Sea, Corsica) is an interesting case study for the evaluation of long-term coastal lagoon ecosystem functioning and the trajectory of submerged macrophyte responses to disturbances, to facilitate the appropriate restoration of...
Tipo: Text
Palavras-chave: Coastal lagoons; Human pressures; Long-term changes; Submerged macrophytes; Community shifts.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00372/48341/48564.pdf

Argo data management report 2018, Coriolis DAC &amp; GDAC
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Carval, Thierry; Coatanoan, Christine; Cancouet, Romain.
This report covers the activity of Coriolis data centre for a one-year period from November 1st 2017 to October 31th 2018.
Tipo: Text
Palavras-chave: Argo; Argo.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00469/58109/60529.pdf

Observations on the relationship between the Antarctic coastal diatoms Thalassiosira antarctica Comber and Porosira glacialis (Grunow) Jorgensen and sea ice concentrations during the late Quaternary
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pike, Jennifer; Crosta, Xavier; Maddison, Eleanor J.; Stickley, Catherine E.; Denis, Delphine; Barbara, Loic; Renssen, Hans.
The available ecological and palaeoecological information for two sea ice-related marine diatoms (Bacillariophyceae), Thalassiosira antarctica Comber and Porosira glacialis (Grunow) Jorgensen, suggests that these two species have similar sea surface temperature (SST), sea surface salinity (SSS) and sea ice proximity preferences. From phytoplankton observations, both are described as summer or autumn bloom species, commonly found in low SST waters associated with sea ice, although rarely within the ice. Both species form resting spores (RS) as irradiance decreases, SST falls and SSS increases in response to freezing ice in autumn. Recent work analysing late Quaternary seasonally laminated diatom ooze from coastal Antarctic sites has revealed that...
Tipo: Text
Palavras-chave: East Antarctica; Quaternary; Diatoms; Sea ice.
Ano: 2009
URL: https://archimer.ifremer.fr/doc/00220/33092/82663.pdf

Seasonal Pattern of the Biogeochemical Properties of Mangrove Sediments Receiving Shrimp Farm Effluents (New Caledonia)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Marchand, Cyril; Molnar, N.; Deborde, Jonathan; Della Patrona, Luc; Meziane, Tarik.
Coastal tropical shrimp farming may impact the adjacent ecosystems through the release of large quantities of effluents rich in nutrients. In New Caledonia, mangroves are considered as a natural biofilter to reduce impacts on the surrounding World Heritage listed lagoon. Our main objective was to understand the influence of effluent discharge on the biogeochemistry of mangrove sediments. A monitoring of the physico-chemical parameters of mangrove sediments was carried out during a whole year, including active and non active periods of the farm. The parameters studied were: i) benthic primary production (Chl-a concentrations), ii) physico-chemical parameters of sediments (redox potential, pH, salinity, TOC, TN, TS, δ13C and δ15N), iii) concentrations of...
Tipo: Text
Palavras-chave: Shrimp farming; Effluents; Mangrove; Sediment biogeochemistry; New Caledonia.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00251/36253/34801.pdf

Croissance et migrations du requin griset
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Desbrosses, Pierre.
The bluntnose sixgill shark is a shark which is easily recognizable through its six gill slits and the presence of a single dorsal fin with a posterior insertion. This shark cruises the waters of the Atlantic Ocean: to the West, it has been observed near Cuba; to the East, it cruises from the coasts of Mauritania, the Canaries and Madeira, to the Mediterranean Sea, the eastern entrance of the English Channel and more rarely in the North Sea. [...]
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1938
URL: http://archimer.ifremer.fr/doc/1938/publication-5771.pdf

On C-Band Quad-Polarized Synthetic Aperture Radar Properties of Ocean Surface Currents
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fan, Shengren; Kudryavtsev, Vladimir; Zhang, Biao; Perrie, William; Chapron, Bertrand; Mouche, Alexis.
We present new results for ocean surface current signatures in dual co- and cross-polarized synthetic aperture radar (SAR) images. C-band RADARSAT-2 quad-polarized SAR ocean scenes are decomposed into resonant Bragg scattering from regular (non-breaking) surface waves and scattering from breaking waves. Surface current signatures in dual co- and cross-polarized SAR images are confirmed to be governed by the modulations due to wave breaking. Due to their small relaxation scale, short Bragg waves are almost insensitive to surface currents. Remarkably, the contrast in sensitivity of the non-polarized contribution to dual co-polarized signals is found to largely exceed, by a factor of about 3, the contrast in sensitivity of the corresponding cross-polarized...
Tipo: Text
Palavras-chave: Quad-polarized SAR; Ocean surface current; Polarization decomposition; Bragg scattering; Breaking waves.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00588/70030/67948.pdf

Programme Coquille Saint-Jacques, filière technique de culture sur le fond. Bilan des contrats de plan 1983-1988 &amp; 1989-1993. 6. Bilan financier 1983-1993. Coût du programme pluriannuel sur les pectinides (coquille Saint Jacques)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Badia Vilato, E.; Kerael, A.; Bonnot, C.
Des actions concertées de recherche développement sur la coquille Saint-Jacques en Bretagne ont été décidées après deux années de préparation entre 1980 et 1982, sous l'égide du G.S.G. (Groupe de Support Général de Gestion des Stocks), groupe d'experts interorganismes (CNEXO, ISTPM, ORSTOM) placé sous l'autorité de la Direction des Pêches et Cultures Marines au Secrétariat d'Etat à la Mer. La Rade de Brest et la Baie de Saint Brieuc ont été choisis comme sites ateliers.
Tipo: Text
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00080/19081/16676.pdf

Two millennia of North Atlantic seasonality and implications for Norse colonies
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Patterson, William P.; Dietrich, Kristin A.; Holmden, Chris; Andrews, John T.
delta(18)O values of mollusks recovered from near-shore marine cores in northwest Iceland quantify significant variation in seasonal temperature over the period from similar to 360 B:C: to similar to A:D: 1660. Twenty-six aragonitic bivalve specimens were selected to represent intervals of climatic interest by using core sedimentological characteristics. Carbonate powder was sequentially micromilled from shell surfaces concordant with growth banding and analyzed for stable oxygen (delta(18)O) and carbon (delta(13)C) isotope values. Because delta(18)O values record subseasonal temperature variation over the lifetime of the bivalves, these data provide the first 2,000-year secular record of North Atlantic seasonality from ca. 360 cal yr B.C. to cal yr A.D....
Tipo: Text
Palavras-chave: Climate change; Stable isotopes; Vikings; Micromilling.
Ano: 2010
URL: https://archimer.ifremer.fr/doc/00231/34231/32834.pdf

Aperçu de la biodiversité marine en Guyane
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Caro, Anthony.
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00029/14009/11200.pdf

A study of autophagy in hemocytes of the Pacific oyster,   Crassostrea gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Picot, Sandy; Morga, Benjamin; Faury, Nicole; Chollet, Bruno; Dégremont, Lionel; Travers, Marie-agnes; Renault, Tristan; Arzul, Isabelle.
Macroautophagy is a mechanism that is involved in various cellular processes, including cellular homeostasis and innate immunity. This pathway has been described in organisms ranging in complexity from yeasts to mammals, and recent results indicate that it occurs in the mantle of the Pacific oyster, Crassostrea gigas. However, the autophagy pathway has never been explored in the hemocytes of C. gigas, which are the main effectors of its immune system and thus play a key role in the defence of the Pacific oyster against pathogens. To investigate autophagy in oyster hemocytes, tools currently used to monitor this mechanism in mammals, including flow cytometry, fluorescent microscopy and transmission electron microscopy, were adapted and applied to the...
Tipo: Text
Palavras-chave: Autophagosome; Autophagy; Crassostrea gigas; Flow cytometry; Fluorescence microscopy; Hemocytes; Transmission electron microscopy.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00487/59905/63087.pdf

Simulating last interglacial climate with NorESM: role of insolation and greenhouse gases in the timing of peak warmth
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Langebroek, P. M.; Nisancioglu, K. H.
The last interglacial (LIG, similar to 130-116 ka, ka = 1000 yr ago) is characterized by high-latitude warming and is therefore often considered as a possible analogue for future warming. However, in contrast to predicted future greenhouse warming, the LIG climate is largely governed by variations in insolation. Greenhouse gas (GHG) concentrations were relatively stable and similar to pre-industrial values, with the exception of the early LIG when, on average, GHGs were slightly lower. We performed six time-slice simulations with the low-resolution version of the Norwegian Earth System Model covering the LIG. In four simulations only the orbital forcing was changed. In two other simulations, representing the early LIG, additionally the GHG forcing was...
Tipo: Text
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00274/38483/36961.pdf

Utilisation et rentabilité des chaluts pélagique et semi-pélagique - Compte rendu des essais effectués par la "Thalassa" en Septembre 1963
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Nedelec, Claude.
Plusieurs types de chaluts pélagiques avaient été mis au point en 1962 au cours d'essais effectués sur la "Thalassa" (1). Malheureusement des conditions de pêche défavorables, et en particulier l'absence d'une détection intéressante au sondeur, n'avaient pas permis d'évaluer le rendement que l'on pouvait attendre de ces engins.
Tipo: Text
Ano: 1963
URL: http://archimer.ifremer.fr/doc/1963/publication-7046.pdf

Evaluation of an operational ocean model configuration at 1/12° spatial resolution for the Indonesian seas – Part 1: Ocean physics
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tranchant, Benoit; Reffray, Guillaume; Greiner, Eric; Nugroho, Dwiyoga; Koch-larrouy, Ariane; Gaspar, Philippe.
INDO12, a 1/12° regional version of the NEMO physical ocean model covering the whole Indonesian EEZ has been developed and is now running every week in the framework of the INDESO project (Infrastructure Development of Space Oceanography) implemented by the Indonesian Ministry of Marine Affairs and Fisheries. The initial hydrographic conditions as well as open boundary conditions are derived from the operational global ocean forecasting system at 1/4° operated by Mercator Ocean. Atmospheric forcing fields (3 hourly ECMWF analyses) are used to force the regional model. INDO12 is also forced by tidal currents and elevations, and by the inverse barometer effect. The turbulent mixing induced by internal tides is taken into account through a specific...
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00295/40661/39644.pdf

On the Extraction of Microseismic Ground Motion from Analog Seismograms for the Validation of Ocean-Climate Models
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lecocq, Thomas; Ardhuin, Fabrice; Collin, Fabienne; Camelbeeck, Thierry.
We report on a pilot demonstration of the usefulness of analog seismograms to improve the database of ocean storms before the 1980s by providing additional data for the quantitative validation of ocean wave modeling, in particular for extreme events. We present a method for automatic digitization of paper seismograms to extract microseismic ground‐motion periods and amplitudes. Each minute of the original paper records is scanned and vectorized. The amplitudes are calibrated based on the original metadata taken from official bulletins. The digitized time series is processed to extract power spectral densities, which are compared with modeled microseisms levels computed using a numerical ocean wave model. As a case study, we focus on one month of data...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00620/73196/72555.pdf

Seasonal variations in photosynthetic irradiance response curves of macrophytes from a Mediterranean coastal lagoon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Plus, Martin; Auby, Isabelle; Verlaque, Marc; Levavasseur, Guy.
The main photosynthesis and respiration parameters (dark respiration rate, light saturated production rate, saturation irradiance, photosynthetic efficiency) were measured on a total of 23 macrophytes of the Than lagoon (2 Phanerogams, 5 Chlorophyceae, 10 Rhodophyceae and 6 Phaeophyceae). Those measurements were performed in vitro under controlled conditions, close to the natural ones, and at several seasons. Concomitantly, measurements of pigment concentrations, carbon, phosphorous and nitrogen contents in tissues were performed. Seasonal intra-specific variability of photosynthetic parameters was found very high, enlightening an important acclimatation capacity. The highest photosynthetic capacities were found for Chlorophyceae (e.g. Monostroma obscurum...
Tipo: Text
Palavras-chave: Thau lagoon; Phaeophyceae; Rhodophyceae; Chlorophyceae; Seagrasses; Seasonal variations; Oxygen method; Macrophytes; Light response curve; Photosynthesis.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-465.pdf

Exemple d’étude d’impact du changement climatique sur la ressource halieutique, le projet CHARM
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vaz, Sandrine.
Le programme européen de coopération transfrontalière INTERREG IV a soutenu le projet de recherche CHARM (CHannel integrated Approach for marine Resource Management) avec un cofinancement par le FEDER. Ce projet franco-britannique proposait un ensemble d’instruments intégrant les connaissances scientifiques essentielles pour une gestion durable des ressources marines vivantes de la Manche.
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00308/41880/41143.pdf

Spéciation des contaminants métalliques en milieu estuarien : Intérêt de la modélisation et application au cadmium
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gonzalez, Jean-louis; Dange, Catherine; Thouvenin, Benedicte.
In estuarine environment, cadmium has a nonconservative behavior. It can be present under various species: dissolved (mineral and organic complexes), colloidal and particulate forms (adsorbed, precipitated), or integrated by various mechanisms in the organisms. This distribution is the result of processes (physical, chemical and biological) which are controlled by many factors (salinity, pH, Eh, nature and concentration of suspended matter, primary production). Geochemical modeling is a very useful approach to understand the dynamics of this type of contaminant, especially in the complex systems which are the estuaries. A speciation model was used to simulate the measurements taken (dissolved and particulate Cd) during various cruises carried out in the...
Tipo: Text
Palavras-chave: Cadmium; Estuary; Speciation; Modeling; Surface complexation; Cadmium; Estuaire; Spéciation; Modélisation; Complexation de surface.
Ano: 2001
URL: https://archimer.ifremer.fr/doc/00480/59120/61749.pdf

Human chorionic gonadotropin induces spermatogenesis and spermiation in 1-year-old European sea bass (Dicentrarchus labrax): Assessment of sperm quality
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Schiavone, R; Zilli, L; Vilella, S; Fauvel, Christian.
The aims of the present study were (a) to compare sperm quality (percentage of motile spermatozoa, motility duration, density and fertility after cryopreservation) between precocious and normally maturing male European sea bass Dicentrarchus labrax, (b) to examine the potential of human chorionic gonadotropin (hCG) to increase spermiation in precocious males and (c) to examine the potential of hCG to induce spermatogenesis and spermiation in non-precocious 1-year-old males. One hundred precocious and 100 non-precocious fish were each randomly divided in two groups each: control (precocious saline-treated and non precocious saline-treated) and treated (precocious hCG-treated and non precocious hCG-treated). Treated groups were administered weekly with 1000...
Tipo: Text
Palavras-chave: Dicentrarchus labrax; HCG; European sea bass; Spermiation; Spermatogenesis.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1815.pdf

Etude du biofilm microalgal des vasières intertidales : dynamique spatio-temporelle à micro-échelle et performances photosynthétiques
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Herlory, Olivier.
The microalgal biofilm, which is present on sediment surface, is the primary production unit on bare intertidal mudlfats. In order to improve our understanding of this primary production system, a study was undertaken at microscale to analyse the structural and functional properties of this biofilm. In the first part of this work, a detailed descriptive analysis lead to the characterisation of the spatiotemporal dynamics of the physical structure of the biofilm. It turns out that the biofilm exhibits its own dynamics at the sediment surface (as a discrete compartment in the top 200 µm), but still has a functional relationship with the total available biomass (PCB) distributed within the top 1 cm (linear relationship between the maximum size of the biofilm...
Tipo: Text
Palavras-chave: PAM Fluorometry; Scanning electron microscopy; Photosynthesis; Spatio temporal dynamic; Micro scale; Microphytobenthic biofilm; Intertidal mudflats; Fluorimétrie PAM; Microscopie électronique à balayage; Photosynthèse; Dynamique spatio temporelle; Micro échelle; Biofilm microphytobenthique; Vasière intertidal.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/these-2138.pdf

Analyse par elements finis d'un catamaran sur coussin d'air en sandwich
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hermundstad, O; Moan, T; Nordal, H.
This paper deals with the structural analysis of transverse frames and bulkheads in sandwich catamarans. Finite element analyses of a frame and a bulkhead have been carried out, and the results are compared to those obtained from a finite element model of the entire craft. The frame and the bulkhead have been analysed with five different boundary conditions. Four idealized load combinations have been applied, and it is demonstrated that transverse frame models can give quite inaccurate results. This is due to the difficulty in deciding the relevant support springs to represent the interaction between the actual frame and the other part of the structure. When designing a new type of vessel, it is recommended to carry out a global finite element analysis...
Tipo: Text
Palavras-chave: Hovercraft; Ship technology; Composite materials; Analyse par éléments finis; Structure sandwich; Catamaran à coussin d'air.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-1076.pdf

La reproduction des huîtres indigènes dans le Morbihan et le Finistère en 1937
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Herman, A.
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1938
URL: http://archimer.ifremer.fr/doc/1938/publication-6890.pdf

CNEXO - Rapport annuel d'activité 1975
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Tipo: Text
Palavras-chave: Marine geosciences; Marine culture; Oceanography; Scientific activities.
Ano: 1975
URL: http://archimer.ifremer.fr/doc/1975/rapport-1729.pdf

RNO. Surveillance du Milieu Marin. Travaux du Réseau National d'Observation de la qualité du milieu marin. Edition 2005
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer.
Tipo: Text
Ano: 2005
URL: http://archimer.ifremer.fr/doc/00314/42570/41940.pdf

Major factors controlling Holocene delta C-13(org) changes in a seasonal sea-ice environment, Adelie Land, East Antarctica
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Crosta, X; Crespin, J; Billy, I; Ther, O.
In an effort to investigate the controlling factors behind Holocene delta C-13(org) changes in East Antarctica we report high-resolution down-core records of bulk organic matter carbon isotopic ratios (delta C-13(org)), diatom census counts, total organic carbon, and biogenic silica content taken from one core recovered in the Adelie Trough. A good correspondence between the delta C-13(org) record and records of small/large and pennate/centric ratios in many of the core segments indicates that diatom species composition affected Holocene delta C-13(org) variations, possibly via diatom shape and size effects. Variations in the surface water CO2 concentration and in the isotopic composition of the source during the Holocene cannot be ruled out although they...
Tipo: Text
Ano: 2005
URL: https://archimer.ifremer.fr/doc/00230/34080/32534.pdf

Modelling species distributions using regression quantiles
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vaz, Sandrine; Martin, C; Eastwood, P; Ernande, Bruno; Carpentier, Andre; Meaden, G; Coppin, Franck.
1. Species distribution modelling is an important and well-established tool for conservation planning and resource management. Modelling techniques based on central estimates of species responses to environmental factors do not always provide ecologically meaningful estimates of species-environment relationships and are being increasingly questioned.   2. Regression quantiles (RQ) can be used to model the upper bounds of species-environment relationships and thus estimate how the environment is limiting the distribution of a species. The resulting models tend to describe potential rather than actual patterns of species distributions.   3. Model selection based on null hypothesis testing and backward elimination, followed by validation procedures, are...
Tipo: Text
Palavras-chave: Marine fish; Limiting factors; Habitat; Geographical information systems; Distribution models.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-3730.pdf

Sampling and observation of oceanic mantle and crust on gorringe bank
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Auzende, Jean-marie; Olivet, Jean-louis; Charvet, J; Le Lann, Alain; Le Pichon, Xavier; Monteiro, Jh; Nicolas, Anne; Ribeiro, A.
THE structure and nature of the uppermost oceanic mantle and crust has been, and still is, the subject of a major international research effort . Yet the direct field evidence known to us on this subject, whether obtained by drilling in the I.P.O.D. oceanic crust programme² or by submersible surveying in the Famous programme , has been either very incomplete or limited to the upper part of layer 2. As a result, the problem of the comparison between ophiolites and oceanic crust is still debated . We report here the preliminary results of an in situ geological survey in which we have sampled and observed what we believe to be an almost complete geological section starting a few kilometres below the Moho discontinuity and ending in the upper part of layer 2...
Tipo: Text
Ano: 1978
URL: http://archimer.ifremer.fr/doc/1978/publication-5230.pdf

Hareng. Statistiques biologiques et considérations sur les populations de harengs de la Manche orientale et du sud de la mer du Nord (matériel prélevé en 1945-46)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ancellin, Jacques.
Le laboratoire de Boulogne-sur-Mer, après avoir vu ses travaux interrompus pendant cinq années et subi une destruction totale au cours de la guerre, a néanmoins repris en partie son activité. Au cours de l'hiver 1945-46, nous avons poursuivi les recherches entreprises depuis 1926 sur les populations de Harengs de la Manche orientale et du Sud de la Mer du Nord, suivant la technique mise au point par M. J. LE GALL, Directeur de l'Office Scientifique et Technique des Pêches Maritimes. Nous exposons ici le résultat de nos observations qui ont surtout porté sur les pêcheries de harengs du Sud de la Mer du Nord.
Tipo: Text
Ano: 1948
URL: http://archimer.ifremer.fr/doc/00038/14963/12290.pdf

Contamination du milieu marin par les micropolluants (résultats du RNO de 1979 à 1994). 2 : Le Bassin d'Arcachon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cantin, Christian.
After a quick presentation of the observation national network of the marine environment quality (RNO), the different metallic and organic Micropollutants measured in four stations of the Bay of Arcachon are described (origin, eventual toxicity). The results of the contamination measurements in the living tissue (oysters) are presented on graphics, based on a sample every three months from 1979 ta 1994, and means are compared to those obtained during the same period on the others points of the Manche-Atlantique coast.  
Tipo: Text
Palavras-chave: Micropolluants; Bassin d'Arcachon; Huîtres; Micropollutants; Bay of Arcachon; Oysters.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00422/53309/54147.pdf

Earthquake crisis unveils the growth of an incipient continental fault system
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gràcia, Eulàlia; Grevemeyer, Ingo; Bartolomé, Rafael; Perea, Hector; Martínez-loriente, Sara; Gómez De La Peña, Laura; Villaseñor, Antonio; Klinger, Yann; Lo Iacono, Claudio; Diez, Susana; Calahorrano, Alcinoe; Camafort, Miquel; Costa, Sergio; D’acremont, Elia; Rabaute, Alain; Ranero, César R.
Large continental faults extend for thousands of kilometres to form boundaries between rigid tectonic blocks. These faults are associated with prominent topographic features and can produce large earthquakes. Here we show the first evidence of a major tectonic structure in its initial-stage, the Al-Idrissi Fault System (AIFS), in the Alboran Sea. Combining bathymetric and seismic reflection data, together with seismological analyses of the 2016 Mw 6.4 earthquake offshore Morocco – the largest event ever recorded in the area – we unveil a 3D geometry for the AIFS. We report evidence of left-lateral strike-slip displacement, characterise the fault segmentation and demonstrate that AIFS is the source of the 2016 events. The occurrence of the Mw 6.4 earthquake...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00513/62427/66705.pdf

Extreme mantle uplift and exhumation along a transpressive transform fault
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Maia, Marcia; Sichel, Susanna; Briais, Anne; Brunelli, Daniele; Ligi, Marco; Ferreira, Nicolas; Campos, Thomas; Mougel, Berengere; Brehme, Isa; Hemond, Christophe; Motoki, Akihisa; Moura, Denise; Scalabrin, Carla; Pessanha, Ivo; Alves, Eliane; Ayres, Arthur; Oliveira, Pedro.
Mantle exhumation at slow-spreading ridges is favoured by extensional tectonics through low-angle detachment faults1, 2, 3, 4, and, along transforms, by transtension due to changes in ridge/transform geometry5, 6. Less common, exhumation by compressive stresses has been proposed for the large-offset transforms of the equatorial Atlantic7, 8. Here we show, using high-resolution bathymetry, seismic and gravity data, that the northern transform fault of the St Paul system has been controlled by compressive deformation since ~10 million years ago. The long-lived transpression resulted from ridge overlap due to the propagation of the northern Mid-Atlantic Ridge segment into the transform domain, which induced the migration and segmentation of the transform...
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00345/45603/49042.pdf

Production artificielle de naissain de coquilles Saint-Jacques Pecten maximus (L.) : Analyse des facteurs affectant la croissance larvaire
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cochard, Jean-claude; Gerard, Andre.
The analysis of the Pecten maximus larval productions carried out between 1982 and 1986 in the framework of the repopulating program of the roadsted of Brest demonstrated the existence of a number of factors affecting larval growth in hatcheries: - Larval growth shows important seasonal fluctuations. It is minimal in February-March (3 to 4 µm.D-1) and maximal in June (6 to 8 µm.D-1). The growth of larvae from conditioned spawners does not differ from that of larvae from mature genitors collected in their natural habitat. Growth is favoured by an unknown factor present in sea water and held with a filtration of 0,2 µm. - The growth of the larvae cultivated in slack water in flat bottom ponds is higher than that of the larvae cultivated in bubbling water in...
Tipo: Text
Palavras-chave: Larve; Ecloserie; Croissance organisme; Coquille Saint Jacques; Pecten maximus L.; Production.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/acte-6534.pdf

Biogeochemistry of organic-rich coastal lagoon sediments
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Martens, C S.
Geochemical processes in organic-rich lagoon sediments are dominated by the influence of microbially mediated degradation of recently deposited organic matter. A detailed study of chemical distributions and transport processes in a small coastal lagoon, Cape Lookout Bight, North Carolina (USA), reveals that degradation of the metabolizable fraction of the total organic matter not only controls interstitial water chemical composition, but drives the recycling of mobile degradation and products to overlying waters and the troposphere.
Tipo: Text
Ano: 1982
URL: http://archimer.ifremer.fr/doc/00246/35704/34213.pdf

Stable isotopes in deep-sea living (stained) foraminifera from the Mozambique Channel (eastern Africa): multispecies signatures and paleoenvironmental application
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fontanier, Christophe; Sakai, Saburo; Toyofuku, Takashi; Garnier, Eline; Brandily, Christophe; Eugene, Thibaut; Deflandre, Bruno.
Oxygen and carbon isotopes (δ18O and δ13C) have been investigated in carbonate tests of deep-sea foraminifera living in the Mozambique Channel (eastern Africa) to understand how environmental constraints (e.g., organic matter, oxygenation) control the intra- and interspecific variability of isotopic signatures. 197 living individuals, including eight different species, from various microhabitats within the sediment were sorted from sediment samples gathered at two stations on the Malagasy upper slope. Results show that the δ18O values of foraminiferal taxa were not controlled by microhabitat pattern. They presented tremendous and intriguing intraspecific variability that is not explained by the classical ontogenetic effect. The δ13C values of infaunal...
Tipo: Text
Palavras-chave: Oxygen and carbon isotopes; Deep-sea foraminifera; Organic matter; Oxygenation; Microhabitat.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00357/46831/46979.pdf

Vortex multipoles in two-layer rotating shallow-water flows
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Baey, Jean-michel; Carton, Xavier.
The stability of elliptically perturbed circular vortices is investigated in a two-layer shallow-water model, with constant background rotation. The fluid is bounded above and below by rigid and flat surfaces. The linear stability analysis shows that elliptical perturbations are most unstable for moderate Burger numbers and vorticity shears. Shorter waves dominate for more sheared vortices. Shallow-water and quasigeostrophic growth rates exhibit a striking similarity, except at each end of the Burger number domain. There, cyclones (anticyclones) with finite Rossby numbers are more (less) unstable than their quasi-geostrophic counterparts. A simple model gives a first-order trend for this bias.   Nonlinear model runs with initially perturbed vortices also...
Tipo: Text
Palavras-chave: Stability analysis; Vortex; Shallow water.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/publication-645.pdf

SeaDataNet : Fifth Annual report Guidelines
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: SeaDataNet Consortium.
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00065/17637/15171.pdf

Hydrothermalisme et minéralisations sur la dorsale Est-Pacifique à 21°N
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Février, Michèle.
Des explorations en submersibles sur la dorsale du Pacifique oriental près de 21°N, ont permis de découvrir un système hydrothermal en activité. Cette activité se manifeste par l'émission dans le milieu marin de fluides chauds (370°C maximum* ) et fortement minéralisés. Ces fluides précipitent au contact de l'eau de mer et des dépôts de sulfures massifs se construisent au débouché des sources
Tipo: Text
Ano: 1981
URL: http://archimer.ifremer.fr/doc/00034/14498/11853.pdf

Utilisation du filet à plancton du type "Bongo"
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Heral, Maurice; Woehrling, Daniel; Halgand, Daniel; Lassus, Patrick.
The "Bongo" net is an American plankton net whose use is coming into general use for studies of ichthyoplankton. Its dimensions and its power of filtration make it an efficient device for researching groups with unevenly spaced micro distribution as well as rare species, especially fish eggs and larvae. It is recommended by the ICNAF (Standard Techniques for Pelagic Fish Eggs and Larvae Surveys) and will soon be recommended by the FAO. The ISTPM, for its part, has been using this net for some years in several campaigns conducted by the Thalassa, the Cryos, La Pélagia, the Roselys and the Ichthys (ISTPM 1971, 1975, ALDEBERT 1975, ARBAULT and LACROIX 1975). In 1975, we decided to use this net in some studies in coastal waters that the ISTPM is conducting in...
Tipo: Text
Palavras-chave: Traitement échantillon; Profondeur immersion; Pêche; Echantillonneur; Filet à plancton.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/acte-2991.pdf

Fichier technique des estuaires bretons - Merrien
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ,.
Le littoral Sud de la Bretagne compris entre l'Aven et la Laïta est entaillé de petites rias encaissées dont la longueur ne dépasse pas en général 500 m sauf pour trois d'entre-elles : BRIGNEAU (1 100 m), MERRIEN (1 800 m), DOELAN (1 200 m).
Tipo: Text
Ano: 1974
URL: http://archimer.ifremer.fr/doc/00081/19186/16781.pdf

Interactions entre pêcheries et tortues marines en France métropolitaine et d'Outre-mer
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Claro, F; Doin, M; Nalovic, Ma; Gambaiani, D; Bedel, S; Forin-wiart, Ma; Poisson, Francois.
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00415/52677/53539.pdf

Crepidula fornicata L. (gastéropode) dans le bassin de Marennes-Oléron : structure, dynamique et production d'une population
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Deslous-paoli, Jean-marc.
The reproduction of Crepidula fornicata occurs from the end of February to October. This reproduction determines two periods of juvenile settlement, the first early in June and the second early in October.  Because of the lack of distinct cohorts, estimation of production and population dynamics was made according to the location of individuals in the chain. This was confirmed by the agreement between the growth rings of the shells and individual location in the chain. The main chain accounted for 80 per cent of individuals, the others being isolated or in collateral chains. The curvilinear growth of Crepidula fornicata in the bay of Marennes-Oléron follows the equation Le = 81.01 (1-e (-0.400 8(t-0,01)). The average yearly production from a population of...
Tipo: Text
Palavras-chave: Production; Marennes-Oléron; Crepidula fornicata; Dynamique de population; Population dynamics; Production; Marennes-Oléron; Crepidula fornicata.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/publication-2956.pdf

Empirical Parameterization of Wave Runup and Dune Erosion during Storm Conditions on a Natural Macrotidal Beach
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Suanez, Serge; Blaise, Emmanuel; Cancouet, Romain; Floc'H, France.
An experimental study based on field measurements for runup parameterization was conducted on a high energy macrotidal beach located on North Brittany (Vougot Beach). The approach was based on morphological and hydrodynamic high frequency monitoring collected between 2008 and 2013. The aim was to quantify in-situ environmental conditions and dimensional swash parameters for the best calibration of Battjes (1971) runup formula. In addition, an empirical equation based on observed tidal water level and offshore wave height was produced to estimate extreme water levels defined as the sum of (i) astronomic tide, (ii) storm surge, and (iii) vertical wave runup. A good correlation between this empirical equation (1.01H(mo)xi(o)) and field runup measurements...
Tipo: Text
Palavras-chave: Macrotidal beach; Runup; Storm; Dune; Erosion; Extreme water level.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00639/75097/75610.pdf

What can exploratory modelling tell us about the ecobiology of European sea bass (     Dicentrarchus labrax     ): a comprehensive overview
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lopez, Romain; De Pontual, Helene; Bertignac, Michel; Mahevas, Stephanie.
European sea bass, Dicentrarchus labrax, is a highly valuable species in Europe, both for aquaculture in the Mediterranean Sea and for commercial and recreational fisheries in the North East Atlantic Ocean. Subjected to increasing fishing pressure, the wild population has recently experienced significant recruitment fluctuation as well as a northward extension of its distribution area in the North Sea. While the nature of the ecological and/or physiological processes involved remains unresolved, ontogenetic habitat shifts and adult site fidelity could increase the species’ vulnerability to climate change and overfishing. As managers look for expert information to propose management scenarios leading to sustainable exploitation, exploratory modelling...
Tipo: Text
Palavras-chave: Population dynamics; Essential habitats; Connectivity; Bioenergetic modeling; Phenotypic plasticity; Life cycle adaptation.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00341/45258/44699.pdf

Morphing Hydrofoil Model Driven by Compliant Composite Structure and Cavity Pressure
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mohammed Arab, Fatiha; Augier, Benoit; Deniset, François; Casari, Pascal; Asrolfi, Jacques-andré.
In this work a collaborative experimental study is conducted in order to assess the effect on the hydrodynamic performanceofacompliantcompositehydrofoilcontrolled by an imposed cavity pressure. It is expected that the cavity pressure together with composite structures is suitable to control the hydrodynamic forces as well as cavitation inception and development. A new concept of morphing hydrofoil is developed by the authors and tested in the cavitation tunnel at the French Naval Academy Research Institute. The experiments are based on the measurements of hydrodynamic forces and hydrofoil deformations under various conditions of cavity pressure. Effect on cavitation inception are shortly studied too. In parallel to this experiment, a 2D numerical tool is...
Tipo: Text
Palavras-chave: Smart-structure; Hydrofoil; Morphing; Compliant; Composite; Cavitation.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00601/71292/69699.pdf

Control of the repeatability of high frequency multibeam echosounder backscatter by using natural reference areas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Roche, Marc; Degrendele, Koen; Vrignaud, Christophe; Loyer, Sophie; Le Bas, Tim; Augustin, Jean-marie; Lurton, Xavier.
The increased use of backscatter measurements in time series for environmental monitoring necessitates the comparability of individual results. With the current lack of pre-calibrated multibeam echosounder systems for absolute backscatter measurement, a pragmatic solution is the use of natural reference areas for ensuring regular assessment of the backscatter measurement repeatability. This method mainly relies on the assumption of a sufficiently stable reference area regarding its backscatter signature. The aptitude of a natural area to provide a stable and uniform backscatter response must be carefully considered and demonstrated by a sufficiently long time-series of measurements. Furthermore, this approach requires a strict control of the acquisition...
Tipo: Text
Palavras-chave: Multibeam echosounder; Seafloor backscatter; Repeatability; Calibration; Reference area; Monitoring.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00422/53384/54234.pdf

Voyage du S.Y. Belgica 1897-1899. Volume 5. Les glaces. Glace de mer et banquises
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Arctowski, Henryk.
Before the cruise of the Belgica, very few studies had been carried out on the ice fields of the southern oceans. Fricker, read through the travel books of Ross, Dumont d'Urville, Wilkes and other sailors who cruised the Antarctic oceans, in search of information on sea-ice, and summed up in very few pages all the knowledge on the South Pole ice fields in 1898, at the same time, the Belgica was trapped in the ice fields.
Tipo: Text
Ano: 1908
URL: http://archimer.ifremer.fr/doc/1908/publication-4737.pdf

Directive Cadre sur l'Eau. Mise en place du contrôle de surveillance dans les masses d'eau côtières du bassin Loire-Bretagne. Bilan des actions réalisées en 2007
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Oger-jeanneret, Helene.
Le réseau de contrôle de surveillance (RCS) de la DCE a démarré en 2007 sur le littoral Loire Bretagne (du Mont Saint-Michel à La Rochelle). Il a été développé en partenariat entre l' lfremer et l'Agence de l'Eau Loire-Bretagne. Ce rapport fait le bilan des lieux de surveillance retenus et des paramètres analysés en 2007. Les résultats de la surveillance feront l'objet d'un rapport ultérieur
Tipo: Text
Palavras-chave: DCE; AELB; Ifremer; Contrôle de surveillance; Hydrologie; Phytoplancton; Macroalgues; Invertébrés benthiques.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00422/53392/54255.pdf

Regulation of nitrogen fixation from free-living organisms in soil and leaf litter of two tropical forests of the Guiana shield
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Van Langenhove, Leandro; Depaepe, Thomas; Vicca, Sara; Van Den Berge, Joke; Stahl, Clement; Courtois, Elodie; Weedon, James; Urbina, Ifigenia; Grau, Oriol; Asensio, Dolores; Peñuelas, Josep; Boeckx, Pascal; Richter, Andreas; Van Der Straeten, Dominique; Janssens, Ivan A.
Background and aims Biological fixation of atmospheric nitrogen (N2) is the main pathway for introducing N into unmanaged ecosystems. While recent estimates suggest that free-living N fixation (FLNF) accounts for the majority of N fixed in mature tropical forests, the controls governing this process are not completely understood. The aim of this study was to quantify FLNF rates and determine its drivers in two tropical pristine forests of French Guiana. Methods We used the acetylene reduction assay to measure FLNF rates at two sites, in two seasons and along three topographical positions, and used regression analyses to identify which edaphic explanatory variables, including carbon (C), nitrogen (N), phosphorus (P) and molybdenum (Mo) content, pH, water...
Tipo: Text
Palavras-chave: Free-living nitrogen fixation; Tropical forest; French Guiana; Nutrients; Phosphorus; Molybdenum.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00487/59901/63083.pdf

Drastic changes in deep-sea sediment porewater composition induced by episodic input of organic matter
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gehlen, Marion; Rabouille, Christophe; Ezat, Ullah; Guidi-guivard, Laurence D.
We report the first seasonal time-series observations of porewater composition obtained for deep-sea sediments. We observed considerable temporal variability of O-2, NO3-, and Mn2+ profiles at the French JGOFS site DYFAMED (western Mediterranean) in response to a pulsed input of organic matter. A delivery of reactive organic matter representing only 1% of the average organic C content of surface sediments (0.6% wt/wt) was required in order to fuel the observed changes in porewater composition. The perturbation resulted in dramatic changes in integrated reaction rates and sediment-water fluxes. O-2 uptake rates increased from 1.26 to 1.82 mmol m(-2) d(-1), while nitrification rates rose from 0.13 to 0.18 mmol m(-2) d(-1). These changes were paralleled by a...
Tipo: Text
Ano: 1997
URL: https://archimer.ifremer.fr/doc/00240/35110/33606.pdf

Les virus de l'estuaire de la Charente el du bassin de Marennes-Oleron. Dynamiques spatio-temporelles et  interactions avec les communautés bactériennes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Auguet, Jean-christophe.
This study is divided in two parts; one aim is to evaluate the in situ spalio-temporal dynamics of viral communities  in the Charante estuary in order to define the appropriate seasons to conduct in vitro viral enrichment experiments. These experiments, that constitute the second part of this study, were performed to assess the impact of freshwater viruses carried by the Charante River on the dynamics and composition of coastal bacterial communities. With abundance ranging from 1.4 x 107 to 208 x I07 VLPml-1. viruses are the most abundant component among plankton microorganisms in surface waters of the Charente estuary. Thre temporal dynamics of this component reflects the indirect influence of temperature through the control of bacterial abundance,...
Tipo: Text
Palavras-chave: Richesse spécifique; Composition clonale; Enrichissement vital; Infection lyrique; Structure des communautés; MET; PPGE; Dynamique temporelle; Gradient de salinité; Estuaire; Bactérioplancton; Virioplancton; Species richness; Clonal composition; Viral enrichment; Lytic infection; Community structure; Diversity; TEM; PEGE; Temporal dynamic; Gradient; Salinity; Estuary; Bacterioplankton; Virioplankton.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/these-3071.pdf

Purification de peptides apparentes a la calcitonine de saumon chez les crustaces. Resultats preliminaires
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vanwormhoudt, A.
In crustacean, immunoreactive peptides were detected with salmon-calcitonin antibodies by immunocytochemistry in its eyestalks and by radioimmunoassay in the haemolymph and the digestive tract. Two different molecules were purified: the first with their molecular weight comprised between 3-5 kDa, the second having a molecular weight of 22 kDa which could correspond to a precursor of the first one. Their characterization is on progress.
Tipo: Text
Palavras-chave: Crustacea; Biochemistry; Cytochemistry; Hormones.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/acte-1385.pdf

Fishing fleet replacement. The French policy from 1945 to 1983
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Meuriot, Eric.
(Not controled OCR )The author describes the French fishing fleet replacement policy from 1945 to 1983 and ascertains from it the objectives and constraints of public policy. While the theoretical and practical negative effects of open-access fisheries were well assessed, the French experience provides an example of the difficulties of carrying out a policy limiting access to fisheries. Domestic conflicts of interest and open competition with foreign countries failed to limit the overall fishing capacity of the French fleet. They have also led the government to focus on shortterm distributional issues rather than on long-term efficiency. It is the author's opinion that similar case studies could be useful for understanding the evolution of the fishing...
Tipo: Text
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/publication-2508.pdf

A moderate melting model for the Voring margin (Norway) based on structural observations and a thermo-kinematical modelling: Implication for the meaning of the lower crustal bodies
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gernigon, Laurent; Lucazeau, Francis; Brigaud, Frederic; Ringenbach, Jean-claude; Planke, Sverre; Le Gall, Bernard.
High P-wave velocities (7.1-7.8 km/s) lower crustal bodies (LCBs) imaged along volcanic margins are commonly interpreted as plume and break-up-related thick mafic underplating. This interpretation is partly challenged in this paper based on new seismic observations and modelling of the outer Voring Basin (Norway). An exceptional strong amplitude reflection, the T Reflection, is particularly well defined below the North Gjallar Ridge (NGR) between 7 and 8 s TWT. The T Reflection is located near the volcanic lava flows emplaced during the NE Atlantic breakup (similar to 55-54 Ma ago) and coincides with the top of the LCB, forming a mid-crustal dome. Based on structural and temporal relationships, we show that the dome clearly influences the structural...
Tipo: Text
Palavras-chave: Mantle plume; Norwegian margin; Underplating; Breakup; Modelling; Rifting; Volcanic margins.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1042.pdf

Surveillance du milieu marin et santé publique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Belin, Catherine; Miossec, Laurence; Joanny, Michel; Claisse, Didier.
La salubrité des produits livrés au consommateur est un des objectifs des programmes de surveillance de la qualité du milieu marin. Trois types de contaminants peuvent altérer la qualité des produits : les micro-organismes pathogènes, les micro-polluants chimiques et les biotoxines sécrétées par certaines espèces phytoplanctoniques. Une surveillance de la salubrité des mollusques bivalves susceptibles d'être affectés par ces trois types de contamination est assurée au plan national dans le cadre du Réseau Microbiologique (REMI), du Réseau National d'Observation de la qualité du milieu marin (RNO) et du Réseau Phytoplanctonique (REPHY).
Tipo: Text
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00017/12796/9737.pdf

Formation and preservation of greigite (Fe3S4) in sediments from the Santa Barbara Basin: Implications for paleoenvironmental changes during the past 35 ka
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Blanchet, C. L.; Thouveny, N.; Vidal, L.
Diagenetic processes are known to modify sedimentary records, but they can also reveal important paleoenvironmental changes. Here we investigate variations in sedimentary iron diagenesis and depositional environments for the last 35 ka by analyzing the rock magnetic and geochemical properties of two sediment cores collected in the Santa Barbara Basin (California). In organic-rich sediments, early diagenesis often leads to partial dissolution of detrital iron oxides and stepwise formation of authigenic pyrite (FeS2). The pyritization process takes place following several geochemical pathways, sometimes involving intermediate iron sulfide species such as greigite (Fe3S4). Sedimentary conditions in the basin appear to have recurrently favored preservation of...
Tipo: Text
Ano: 2009
URL: https://archimer.ifremer.fr/doc/00218/32936/31447.pdf

Understanding continent-ocean sediment transfer
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mulder, Thierry; Cirac, Pierre; Gaudin, Mathieu; Bourillet, Jean-francois; Trainer, J.; Normand, Alain; Weber, O.; Griboulard, R.; Jouanneau, Jean-marie; Anschutz, Pierre; Jorissen, Frans.
Submarine canyons are narrow but deep submarine valleys that extend for hundreds of meters. They represent the most impressive structures that shape the present morphology of passive continental margins. They can occur off the mouth of rivers: the Tagus, Zaire, Amazon, and Orinoco in the Atlantic; the Indus in the Indian Ocean; and the Var, Rhone, and Ebro in the Mediterranean. Some are at times disconnected from any stream mouth such as the Nazare canyon, off Portugal, despite the fact that it is close to the coast. Some were connected to a river mouth during lowstands of sea level, such as the Wilmington canyon in the northwest Atlantic, or the Blackmud canyon in the northeast Atlantic.
Tipo: Text
Ano: 2004
URL: http://archimer.ifremer.fr/doc/00071/18201/15769.pdf

The many ways of coping with pressure
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Oger, Philippe M.; Jebbar, Mohamed.
The current paper reviews strategies employed by microorganisms from the deep biosphere, especially piezophiles (from the greek piezo = to press and philo = love), to cope with high hydrostatic pressure (HHP) prevailing in these biotopes. The aim of this review is not to constitute an exhaustive report of our current knowledge on the physiology of piezophiles, as recent reviews have covered part of this subject in detail (Abe, 2007; Lauro and Bartlett, 2008; Michiels et al., 2008; Simonato et al., 2006). Rather, we illustrate here, via a few chosen examples, where we stand in our understanding of the mechanisms employed by microorganisms from the depths of our planet to cope with HHP. (C) 2010 Institut Pasteur. Published by Elsevier Masson SAS. All rights...
Tipo: Text
Palavras-chave: Adaptation and evolution; Archaea; Deep biosphere; High hydrostatic pressure; Piezophile; Stress response.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00027/13797/11043.pdf

Rapport sur l'étude de la parasitose de l'huitre plate en Bretagne - Etude sur Bonamia Ostreae (Épidémiologie, cycles, essais d'éradication)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Grizel, Henri; Tige, Gilbert; Gadeau, V.; Bachere, Evelyne.
En 1968, un nouveau parasite est mis en évidence par HERRBACB (1971) sur des huîtres plates élevées dans l'Aber Wrach. celui-ci, décrit en 1974 par GRIZEL et coll., sous le nom de Marteilia refringens, s'est propagé progressivement à de nombreux centres d'élevages bretons atteignant le département du Morbihan en 1974 (GRIZEL et coll., 1976). Les premières zones touchées ont été le golfe du Morbihan et la rivière d'Auray, puis en 1975 les rivières de St Philibert et de Crach. La période d'infestation, limitée dans le temps, a lieu durant la période estivale principalement au cours des mois de juillet et août (GRIZEL et coll., 1977). Afin d'enrayer la maladie, et suite aux connaissances acquises, des mesures prophylactiques ont été mises en place, notamment...
Tipo: Text
Ano: 1980
URL: http://archimer.ifremer.fr/doc/00045/15674/13077.pdf

Analyse des sources directes et chroniques en substances dangereuses vers le milieu aquatique. Sous-région marine Golfe de Gascogne. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bourrain, Xavier; Lebat, Éric.
Tipo: Text
Palavras-chave: Golfe de Gascogne; Substances dangereuses; Analyse; Sources; Rejets en mer; Bassins.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00329/44048/43619.pdf

Nutrient Fluxes Associated With Submarine Groundwater Discharge From Karstic Coastal Aquifers (Côte Bleue, French Mediterranean Coastline)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bejannin, Simon; Tamborski, Joseph James; Van Beek, Pieter; Souhaut, Marc; Stieglitz, Thomas; Radakovitch, Olivier; Claude, Christelle; Conan, Pascal; Pujo-pay, Mireille; Crispi, Olivier; Le Roy, Emilie; Estournel, Claude.
Determination of submarine groundwater discharge (SGD) from karstic coastal aquifers is important to constrain hydrological and biogeochemical cycles. However, SGD quantification using commonly employed geochemical methods can be difficult to constrain under the presence of large riverine inputs, and is further complicated by the determination of the karstic groundwater endmember. Here, we investigated a coastal region where groundwater discharges from a karstic aquifer system using airborne thermal infrared mapping and geochemical sampling conducted along offshore transects. We report radium data (223Ra, 224Ra, 228Ra) that we used to derive fluxes (water, nutrients) associated with terrestrial groundwater discharge and/or seawater circulation through the...
Tipo: Text
Palavras-chave: Submarine groundwater discharge; Mediterranean sea; Radium isotopes; Thermal infrared remote sensing; Nutrient fluxes; GEOTRACES.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00610/72171/70945.pdf

Qualité du Milieu Marin Littoral - Bulletin de la surveillance - Edition 2010 - Départements : Charente- Maritime &amp; Vendée (Sud)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer.
Le Laboratoire Environnement Ressources des Pertuis Charentais opère, sur le littoral des départements de Charente-Maritime et de Vendée (partie sud), les réseaux de surveillance nationaux de l'Ifremer dont une description succincte est présentée ci-dessous, ainsi que des réseaux régionaux. Les résultats figurant dans ce bulletin sont obtenus à partir de données validées extraites de la base Ifremer Quadrige (base des données de la surveillance de l'environnement marin littoral), données recueillies jusqu’en 2009 : REMI Réseau de contrôle microbiologique, REPHY Réseau de surveillance du phytoplancton et des phycotoxines, ROCCH Réseau d’observation de la contamination chimique, REMORA Réseau mollusques des ressources aquacoles, REMOULA Réseau régional de...
Tipo: Text
Palavras-chave: Surveillance pollution; Milieu marin; Réseau observation; Zone littorale; Phytoplancton; Metal lourd; Toxicité; Escherichia coli; Alexandrium; Dinophysis; Charente Maritime; Vendée Sud.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00041/15216/12541.pdf

Fractionation of fish protein hydrolysates by ultrafiltration and nanofiltration: impact on peptidic populations
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bourseau, Patrick; Vandanjon, Laurent; Jaouen, Pascal; Chaplain-derouiniot, Maryse; Masse, Anthony; Guerard, Fabienne; Chabeaud, Aurélie; Fouchereau-peron, Martine; Le Gal, Yves; Ravallec-ple, Rosenn; Berge, Jean-pascal; Picot, Laurent; Piot, Jean -marie; Batista, Ireneu; Thorkelsson, Gudjon; Delannoy, Charles; Jakobsen, Greta; Johansson, Inger.
The production by enzymatic treatment of fish protein hydrolysates (FPH) is a promising route to add value to fisheries proteinic co-products (fish frames, heads etc.). Indeed, FPH possess good nutritional properties and biological activities for food and feed uses. Pressure-driven membrane separations such as ultrafiltration (UF) and nanofiltration (NF) can be used after the hydrolysis to, increase the specific activities of the FPH. This paper discusses the impact of a two-step UF/NF process producing four different fractions on two industrial FPH with different hydrolysis degrees. Fractionation is carried out in "realistic" conditions for an industrial process, on highly concentrated FPH solutions (about 100 g of dry matter/L) at a high volume reduction...
Tipo: Text
Palavras-chave: Peptidic profile; Fractionation process; Membrane separation; Nanofiltration; Ultrafiltration; FPH; Fish protein hydrolysate.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6653.pdf

Possibilité d'une culture industrielle de l'algue rouge Eucheuma Spinosum dans le golfe de Tadjourah
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Perez, René; Braud, Jean-paul.
L'algue rouge Eucheuma spinosum (fig. 1) contient en forte proportion un produit de très haute qualité et relativement rare : le iota carraghénane. Ce composé est isolé par les usines d'extraction et utilisé, une fois purifié, dans de nombreuses branches industrielles, notamment dans l'industrie alimentaire pour la constitution de la plupart des flans, laits gélifiés, glaces, pâtisseries, etc ...
Tipo: Text
Ano: 1978
URL: http://archimer.ifremer.fr/doc/1978/publication-7148.pdf

Gas Hydrates 2 : Geoscience Issues and Potential Industrial Applications
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ruffine, Livio; Broseta, Daniel; Desmedt, Arnaud.
In recent years, interest for clathrate hydrates has increased, motivated both by their fascinating physiochemical and thermophysical properties and their industrial and practical promises in various areas of application. Following the 2017 publication of Volume 1, which focused on fundamental aspects, modeling and characterization methods, this volume gathers a series of contributions addressing the natural occurrence of clathrate hydrates in sediments on Earth, with implications for the methane cycle, geohazards and energy resources, and then a few promising industrial applications. This volume is intended for scientists, PhD students and engineers who wish to start working on clathrate hydrates and/or want to acquire general knowledge in this area. It...
Tipo: Text
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00453/56507/58855.pdf

Quelques observations sur les fonds de pêche du golfe du Lion
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pruvot, G.
La France qui possède sur la Méditerranée une ligne étendue de côtes, plus de 2.000 kilomètres, sans compter les 1'200 kilomètres de la Mer tunisienne, n'est pas favorisée au même degré ; en ce qui concerne les surfaces utilisables pour la grande pêche.
Tipo: Text
Ano: 1921
URL: http://archimer.ifremer.fr/doc/00016/12760/9697.pdf

Control Strategies for Floating Offshore Wind Turbine: Challenges and Trends
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Salic, Tom; Charpentier, Jean Frédéric; Benbouzid, Mohamed; Le Boulluec, Marc.
The offshore wind resource has huge energy potential. However, wind turbine floating structures have to withstand harsh conditions. Strong wind and wave effects combine to generate vibrations, fatigue, and heavy loads on the structure and other elements of the wind turbine. These structural problems increase maintenance requirements and risk of failure, while reducing availability and energy production. Another challenge for wind energy is to reduce production costs in order to be competitive with other alternatives. From the control point of view, the objective of lowering costs can be achieved by operating the turbine close to its optimum point of operation under partial load, guaranteeing reliability by reducing structural loads and regulating the power...
Tipo: Text
Palavras-chave: Wind energy; Floating offshore wind turbine; Control; State of art review.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00588/69991/67899.pdf

Ge and Si isotope signatures in rivers: A quantitative multi-proxy approach
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Baronas, J. Jotautas; Torres, Mark A.; West, A. Joshua; Rouxel, Olivier; Georg, Bastian; Bouchez, Julien; Gaillardet, Jerome; Hammond, Douglas E.
Solutes derived from the dissolution of silicate minerals play a key role in Earth’s climate via the carbon and other biogeochemical cycles. Silicon (Si) is a unique constituent of silicate minerals and a biologically important nutrient, so tracing its behavior in near-surface environments may provide important insights into weathering processes. However, Si released by weathering is variably incorporated into secondary mineral phases and biota, obscuring signals derived from primary weathering processes. Due to chemical similarities, Germanium (Ge) may help better understand the Si cycle and its relationship to chemical weathering. With this aim, we report new measurements of the concentration and isotopic composition of Ge for both the dissolved and...
Tipo: Text
Palavras-chave: Germanium; Silicon; Isotopes; Rivers; Weathering; Fractionation.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00460/57196/59370.pdf

Culture d'huîtres creuses en eaux profondes dans le Pertuis d'Antioche. Comparaison avec les cultures sur estran du bassin de Marennes Oléron et de Fouras et les filières d'élevage des Saumonards. Période avril 2002 - décembre 2002
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Robert, Stephane; Le Moine, Olivier; Razet, Daniel; Guilpain, Patrice; Geairon, Philippe; Arnaud, Christophe; Chollet, Bruno; Faury, Nicole; Soletchnik, Patrick; Seugnet, Jean-luc; Mille, Dominique.
Le Bassin ostréicole de Marennes-Oléron, et globalement la Charente-Maritime, sont marqués depuis les années 80 (Héral, 1986), par un net recul des rendements de production qui engendre une diminution de la rentabilité économique et un accroissement des coûts de production. La démonstration de la surcharge biologique du Bassin de Marennes-Oléron est démontrée depuis 1985. Cette situation a évolué depuis cette date, par une diminution des cheptels en élevage et par une augmentation des cheptels sauvages ce qui a abouti à des plans d'entretien et de restructuration du DPM. Cependant, la situation défavorable pour la majorité des zones charentaises en terme de « croissance - production» est annuellement confirmée, depuis 1993 au moyen des réseaux de suivi de...
Tipo: Text
Palavras-chave: Ostréiculture; Elevage en eaux profondes; Suivis expérimentaux; Biométrie; Mortalité; Bassin de Marennes Oléron; Fouras; Saumonards.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00134/24525/22559.pdf

Evaluation de la qualité des zones de production conchylicole en Normandie. Départements du Calvados, de la Manche et de la Seine-Maritime. Edition 2017
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mary, Charlotte; Lamort, Laure; Lesaulnier, Nadine.
Après un rappel des objectifs, du fonctionnement et de la méthode d’interprétation des résultats du réseau de contrôle microbiologique REMI et du réseau de surveillance chimique ROCCH, ce rapport décrit le programme annuel du département du Calvados. Il présente l’ensemble des résultats obtenus de 2014 à 2016, en particulier l’estimation de la qualité microbiologique et chimique des zones de production de coquillages classées. Ce rapport intègre également les résultats du réseau « Coquillages » de l’Agence Régionale de Santé de Basse Normandie dans le cadre de la surveillance de la qualité des zones de pêche à pieds récréative.
Tipo: Text
Palavras-chave: REMI; E. Coli; Contamination bactériologique des coquillages; ROCCH; Contaminants chimiques; Milieu marin; Classement sanitaire des zones de production; Département du Calvados; De la Manche et de la Seine Maritime.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00386/49706/50375.pdf

Sur une affection parasitaire de la glande digestive de l'huitre plate, Ostrea Edulis Linne
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Herrbach, Bernadette.
During the summer of 1968, an abnormal mortality rate struck the flat oyster, O. edulis, raised in the upstream part of the Aber Wrach, a ria of Brittany's north coast. During the autumn, the phenomenon expanded steadily and progressively reached the various sectors of the estuary up to its mouth. Losses often reached and exceeded half the stock of oysters of all ages that were held there. The molluscs that survived, whether they were left where they were or transferred to other oyster-farming areas, had a deficient look characterised by a lack of growth, paleness of the digestive gland and an often very marked weight loss. On the weakest ones, the parasite flagellate Hexamita sp. was frequently found. In January 1969, changes similar to those noticed in...
Tipo: Text
Ano: 1971
URL: http://archimer.ifremer.fr/doc/1971/publication-2388.pdf

Bivariate simulation of non stationary and non Gaussian observed processes - Application to sea state parameters
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Monbet, Valerie; Prevosto, Marc.
A method for artificially generating operational sea state histories has been developed. This is a distribution free method to simulate bivariate non stationary and non Gaussian random processes. This method is applied to the simulation of the bivariate process (H-s, T-p) of sea state parameters. The time series respects the physical constraints existing between the significant wave height and the peak period. Furthermore, we show that the persistence properties of the simulations match to those of the observations.
Tipo: Text
Palavras-chave: Bivariate simulation; Non Gaussian processes; Wave data; Non parametric simulation.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-4343.pdf

Manuel de laboratoire pour l'industrie des huiles et graisses
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Marcusson, J.
Les huiles, les graisses et les cires, qui constituent les matières premières des industries des matières grasses, existent toutes formées dans les plantes et dans les animaux. Les huiles végétales s'obtiennent à partir de graines ou de fruits écrasés, soit par expression à la presse hydraulique, soit par extraction à l'essence, à la benzine, au sulfure de carbone, etc. Les huiles animales et les cires s'obtiennent soit par fusion avec ou sans action de la vapeur, soit aussi par extraction à l'essence ou à la benzine, ou par des solutions de savon (graisse de laine).
Tipo: Text
Ano: 1929
URL: http://archimer.ifremer.fr/doc/00032/14298/11577.pdf

Report of the second Workshop on Age Reading of Red Mullet and Striped Red Mullet. 2 - 6 July 2012 Boulogne-sur-Mer, France
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: ICES.
The Planning Group on Commercial Catch, Discards and Biological Sampling (PGCCDBS) and the Planning Group of Mediterranean (PGMED) meetings in 2011 (ICES, 2011a) recommended an otoliths and scales exchange for Mullus species from Atlantic and Mediterranean sea. Workshop on Age reading red mullet (Mullus barbatus) and striped red mullet (Mullus surmuletus) (WKACM2, chair : K. Mahé, France) has been held in Boulogne sur Mer (France) from 2 to 6 July 2012. Five countries took part in this exchange (Spain, Greece, Cyprus, Italy, France, for a total of 8 partici-pants) during 2011, and 3 countries (Spain, Italy, France: 6 participants) have been involved in the workshop. Results of this exchange showed important problems between readers (Mahé et al., 2012). The...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00174/28517/26883.pdf

Community analysis of pigment patterns from 37 microalgae strains reveals new carotenoids and porphyrins characteristic of distinct strains and taxonomic groups
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Serive, Benoit; Nicolau, Elodie; Berard, Jean-baptiste; Kaas, Raymond; Pasquet, Virginie; Picot, Laurent; Cadoret, Jean-paul.
Phytoplankton, with an estimated 30 000 to 1 000 000 species clustered in 12 phyla, presents a high taxonomic and ecophysiological diversity, reflected by the complex distribution of pigments among the different algal classes. High performance liquid chromatography is the gold standard method for qualitative and quantitative analysis of phytoplankton pigments in seawater and culture samples, but only a few pigments can be used as robust chemotaxonomic markers. A major challenge is thus to identify new ones, characteristic of a strain, species, class or taxon that cannot be currently identified on the basis of its pigment signature. Using an optimized extraction process coupled to a HPLC de-replication strategy, we examined the pigment composition of 37...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00373/48416/48627.pdf

Le baliste des côtes africaines, (Balistes carolinensis). Biologie, prolifération et possibilités d'exploitation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Caveriviere, A.
Tipo: Text
Ano: 1982
URL: http://archimer.ifremer.fr/doc/00121/23197/21042.pdf

Comments on "Shallow gas off the Rhone prodelta, Gulf of Lions" by Garcia-Garcia et al. (2006) Marine Geology 234 (215-231) - Reply
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Garcia Garcia, A; Orange, D; Lorenson, T; Radakovitch, O; Tesi, T; Miserocchi, S; Berne, Serge; Friend, P; Nittrouer, C; Normand, Alain.
We really appreciate the interest and comments regarding our manuscript. We hope we address all the lingering issues in this reply. This also gives us the opportunity of publishing an update on our dataset that will complete the original manuscript (see Table 1). We have followed the author pattern in our answers: I-Gas sampling procedure, 2-Reported gas concentrations results, 3-General remarks, 4-Conclusions. (c) 2007 Elsevier B.V. All rights reserved.
Tipo: Text
Palavras-chave: Gulf of Lions; Rhone prodelta; Flood deposits; Biogenic methane; Shallow gas.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-3846.pdf

BathyMeshGridTools : CheckBMG User Manual
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Theetten, Sebastien.
The BMGTools, created by IFREMER, are a set of pre-processing tools that help you create, check and modify bathymetric grids. CheckBMG is a part of the BMGTools. Its purpose is to help you to visualise grids created with the MARS code or with other applications and to allow you to check the relevance of the interpolation. If necessary, you can modify the grid to manually correct algorithm errors. The present document is the user manual of CheckBMG.
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00028/13880/11029.pdf

A triage approach to improve the relevance of marine ecosystem services assessments
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pendleton, Linwood; Mongruel, Remi; Beaumont, Nicola; Hooper, Tara; Charles, Mahe.
Ecosystem services assessments are increasingly being used to inform marine policy and planning. These assessments involve significant time, effort, and expertise. It is important at the outset to determine which of many ecosystem services should be quantified and which measures of ecological output, economic impact, or value should be assessed. Furthermore, the literature shows that in practice such assessments are unevenly applied and rarely used effectively in decision-making processes. We develop a structured decision-making approach, called a triage, to assess what types of ecosystem services should be assessed to improve the uptake and usefulness of such information in marine planning. Two case studies, in France and the United Kingdom, provide...
Tipo: Text
Palavras-chave: Ecosystem services; Assessment; Marine planning; Marine protection.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00273/38421/36744.pdf

Surveillance Écologique et Halieutique Site de Gravelines. Novembre 2014 - Octobre 2015
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Antajan, Elvire; Lefebvre, Alain; Loots, Christophe; Rocroy, Mélanie; Ruellet, Thierry.
This is the 38th annual surveillance report concerning the nuclear power plant of Gravelines. Its very high power level results from six plant units located on the shore and is characterised by a cooling system with a coastal surface input and output. The production of electricity began in 1980 and reached maximum in 1986. Surveys concern monitoring of pelagic system (hydrology, microbiology, phytoplankton, and zooplankton), fish populations (larvae and eggs of Sole and Sprat) or crustaceans (shrimps), and benthic macrofauna (intertidal and subtidal). This survey deals with spatial and temporal approaches (i) study of the direct impact by comparison of the input and output seawater stations, (ii) study of medium and long term evolution of the area by...
Tipo: Text
Palavras-chave: Centrale nucléaire; Gravelines; Surveillance; Hydrologie; Halieutique; Plancton; Benthos; Microbiologie; Nuclear power plant; Gravelines; Network survey; Hydrology; Fisheries; Plankton; Microbiology; Benthos.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00332/44313/43879.pdf

Connecting organic to mineral: How the physiological state of an ecosystem-engineer is linked to its habitat structure
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Curd, Amelia; Pernet, Fabrice; Corporeau, Charlotte; Delisle, Lizenn; Firth, Louise B.; Nunes, Flavia; Dubois, Stanislas.
The honeycomb worm Sabellaria alveolata is capable of building extensive bioconstructions, including what are currently considered Europe’s largest biogenic reefs. The size and volume of these bioconstructions, however, vary greatly, such that not all habitats engineered by S. alveolata may be easily identified as reefs. Given that European environmental legislation protects marine habitats that are classified as “reefs”, it is important to identity a clear set of definition criteria. Furthermore, quantifiable and unequivocal criteria are also needed to evaluate the ecological (health) state of these reefs, in order to best monitor and protect them. Here we propose new terminology to describe the physical appearance of these bioconstructions and attempt to...
Tipo: Text
Palavras-chave: Biochemical indicators; Health; Ecological status; Sabellaria alveolata; Biogcnic reef; Engineer species.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00464/57608/60175.pdf

Mortalités d'huîtres creuses adultes (Crassostrea gigas) et infection à Vibrio aestuarianus - AESTU
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Travers, Marie-agnes; Degremont, Lionel; De Lorgeril, Julien; Azema, Patrick; Montagnani, Caroline; Benabdelmouna, Abdellah; Nicolas, Jean-louis; Le Roux, Frederique.
En 2012, le nombre de cas de mortalités d’huîtres creuses adultes rapportés dans le cadre du réseau Repamo, et dans lesquels la bactérie Vibrio aestuarianus a été isolée, a fortement augmenté. Afin d’apporter de premiers éléments de réponse concernant cette augmentation, les objectifs de cette étude étaient de déterminer si l’émergence/la ré-émergence de V. aestuarianus était associée (i) à l’apparition d’un génotype bactérien particulier et/ou (ii) à une sensibilité accrue de certains animaux. L’Ifremer dispose d’une collection de souches bactériennes appartenant majoritairement au genre Vibrio et qui comporte différents isolats de V. aestuarianus, collectés depuis 2001 pendant ou hors épisodes de mortalité. La comparaison de ces isolats en termes de...
Tipo: Text
Palavras-chave: Vibrio aestuarianus; Huître creuse; Crassostrea gigas; Bactérie; Ré-émergenece; Virulence; Génome; Statut immunitaire; Génétique.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00229/34037/32430.pdf

L’océan porteur d’enjeux de croissance et de défis majeurs dans l’outre-mer français du Pacifique Sud
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Loubersac, Lionel.
The text is the transcription of the oral presentation made on November 5th, 2014 in front of the National Assembly in Paris within the framework of the conference, organized by the FEDOM and the ACCIOM, entitled: " the economic and strategic stakes of South Pacific overseas French Territories: New Caledonia, French Polynesia, Wallis and Futuna : valuable lands, ocean of future ". After a presentation of the geographical context of the three communities: New Caledonia, Wallis and Futuna and French Polynesia, a first chapter develops their main advantages towards stakes in economic growth in terms of spaces, quality, biodiversity, geo-diversity, energy resources, know-how … A second chapter, after a reminder of the ambitions of the National Commission on...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00255/36615/35184.pdf

Geographic isolation and larval dispersal shape seascape genetic patterns differently according to spatial scale
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dalongeville, Alicia; Andrello, Marco; Mouillot, David; Lobreaux, Stephane; Fortin, Marie-josee; Lasram, Frida; Belmaker, Jonathan; Rocklin, Delphine; Manel, Stephanie.
Genetic variation, as a basis of evolutionary change, allows species to adapt and persist in different climates and environments. Yet, a comprehensive assessment of the drivers of genetic variation at different spatial scales is still missing in marine ecosystems. Here, we investigated the influence of environment, geographic isolation, and larval dispersal on the variation in allele frequencies, using an extensive spatial sampling (47 locations) of the striped red mullet (Mullus surmuletus) in the Mediterranean Sea. Univariate multiple regressions were used to test the influence of environment (salinity and temperature), geographic isolation, and larval dispersal on single nucleotide polymorphism (SNP) allele frequencies. We used Moran's eigenvector maps...
Tipo: Text
Palavras-chave: Connectivity; Ecological genetics; Marine fish; Mediterranean Sea; Mullus surmuletus; Seascape genetics; Single nucleotide polymorphism.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00454/56556/75079.pdf

Building of an immunosensor: How can the composition and structure of the thiol attachment layer affect the immunosensor efficiency?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Briand, Elisabeth; Salmain, Michèle; Henry, Jean-marie; Perrot, Hubert; Compere, Chantal; Pradier, Claire-marie.
Immunosensors, based on the immobilization of a model rabbit antibody on mixed self-assembled monolayers and Protein A as a linking agent on gold transducers, were elaborated and characterized at each step by modulated polarization-infrared spectroscopy (PM-IRRAS) and occasionally by atomic force microscopy (AFM) and quartz crystal microbalance (QCM). By testing two different mixed SAMs comprising 11-mercaptoundecanoic acid (MUA), together with either decanethiol (C9CH3) or mercaptohexanol (C6OH), the role of the chemical composition and structure of the antibody attachment layer upon the sensor performance was demonstrated. (c) 2006 Elsevier B.V. All rights reserved.
Tipo: Text
Palavras-chave: QCM; IRRAS; Thiol attachment; Immunosensor; Mixed SAM' s.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1988.pdf

The Effect of Crowding on Protein Stability, Rigidity, and High Pressure Sensitivity in Whole Cells
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Golub, Maksym; Martinez, Nicolas; Michoud, Gregoire; Ollivier, Jacques; Jebbar, Mohamed; Oger, Philippe; Peters, Judith.
In live cells, high concentrations up to 300–400 mg/mL, as in Eschericia coli (Ellis, R. J. Curr. Opin. Struct. Biol. 2001, 11, 114) are achieved which have effects on their proper functioning. However, in many experiments only individual parts of the cells as proteins or membranes are studied in order to get insight into these specific components and to avoid the high complexity of whole cells, neglecting by the way the influence of crowding. In the present study, we investigated cells of the order of Thermococcales, which are known to live under extreme conditions, in their intact form and after cell lysis to extract the effect of crowding on the molecular dynamics of the proteome and of water molecules. We found that some parameters characterizing the...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00454/56526/58329.pdf

Characterization of summer mortalities of C. gigas oyster in France in relation to environmental parameters
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Soletchnik, Patrick; Ropert, Michel; Bedier, Edouard; Costil, K. S.; Dubois, Brice; Degremont, Lionel; Bouget, Jean-francois; Martin, Jean-louis; Enriquez-diaz, M.; Faury, Nicole; Le Moine, Olivier; Renault, Tristan; Gagnaire, Beatrice; Huvet, Arnaud; Moal, Jeanne; Samain, Jean-francois.
Field characterization of summer mortality was performed in France in the frame of the Morest project. Natural and hatchery spat were compared between three oyster production areas in France. Regardless of the natural or hatchery origin, oysters died during the reproduction period after temperature reaches 19 degree C. Thus, in southern areas, temperature accelerated gametogenesis of small spat (10mm) as well as adults, and mortality appeared for the two age classes. In contrast, sexual maturation proceeded more slowly in northern where spat mortality was lower compared to 18 months old oysters. However, critical gametogenesis and temperature were not sufficient to induce mortalities, as observed in examples with stable environment. Alternatively sediment...
Tipo: Text
Palavras-chave: Seasonal variation; Oyster culture; Mortality causes; Hatcheries; Gametogenesis; Environmental factors; Crassostrea gigas; Oysters.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/acte-3348.pdf

Medspiration - A precursor to the GMES marine core service sea-surface Thematic Assembly Centre
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Arino, O; Donlon, R; Robinson, I; Piolle, Jean-francois; Leborgne, P.
The Global Monitoring for the Environment and Security (GMES) initiative lead by the European Commission and ESA recently opened the call to set up the 'Marine Care Service' for oceanography users. Two of the six planned 'Thematic Assembly Centres' will build on ESA's Medspiration and GlobColour projects, which covered, respectively, sea-surface temperature and ocean colour. Both are described in companion articles in this issue. The services will make full use of instruments aboard ESA's Envisat. Their successors on the Sentinel-3 satellite series will ensure operational space oceanography services for the two decades starting in 2012.
Tipo: Text
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-6181.pdf

Crustal structure of the Ionian basin and eastern Sicily margin: results from a wide-angle seismic survey.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dellong, David; Klingelhoefer, Frauke; Kopp, Heidrun; Graindorge, David; Margheriti, Lucia; Moretti, Milena; Murphy, Shane; Gutscher, Marc-andre.
In the Ionian Sea (Central Mediterranean) the slow convergence between Africa and Eurasia results in the formation of a narrow subduction zone. The nature of the crust of the subducting plate remains debated and could represent the last remnants of the Neo-Tethys ocean. The origin of the Ionian basin is also under discussion, especially concerning the rifting mechanisms as the Malta Escarpment could represent a remnant of this opening. This subduction retreat toward the south-east (motion occurring since the last 35 Ma) but is confined to the narrow Ionian Basin. A major lateral slab tear fault is required to accommodate the slab roll-back. This fault is thought to propagate along the eastern Sicily margin but its precise location remains controversial....
Tipo: Text
Palavras-chave: Ionian basin; Crustal structure; Wide-angle seismic; Geodynamic; Mediterranean; Malta Escarpment.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00427/53885/54956.pdf

Ocean/Atmosphere Interactions and Trace Metal Geochemistry in Ocean and Sea Ice Sediments.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Taylor, Meghan Anne.
During last glacial period, abrupt climate events were recorded in the Greenland ice core and North Atlantic sediment cores suggest major millennial scale variability in the northern North Atlantic, marked by a series of abrupt climate changes from 60 to 20 ka, first characterized by rapid shifts in the Greenland ice core oxygen isotope record. The use of high-resolution marine sediment cores in regions like the Pacific Ocean that are far afield from the region of climatic forcing allows us to evaluate different mechanisms for transmission of these major climate change events. The subarctic northeastern Pacific Ocean was also influenced by the growth and retreat of the smaller, western side of the North American ice sheet, the Cordilleran Ice Sheet (CIS)....
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00494/60607/64093.pdf

Antarctic icebergs distributions 1992-2014
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Tournadre, Jean; Bouhier, Nicolas; Girard-ardhuin, Fanny; Remy, F.
Basal melting of floating ice shelves and iceberg calving constitute the two almost equal paths of freshwater flux between the Antarctic ice cap and the Southern Ocean. The largest icebergs (&gt;100 km2) transport most of the ice volume but their basal melting is small compared to their breaking into smaller icebergs that constitute thus the major vector of freshwater. The archives of nine altimeters have been processed to create a database of small icebergs (&lt;8 km2) within open water containing the positions, sizes, and volumes spanning the 1992–2014 period. The intercalibrated monthly ice volumes from the different altimeters have been merged in a homogeneous 23 year climatology. The iceberg size distribution, covering the 0.1–10,000 km2 range,...
Tipo: Text
Palavras-chave: Iceberg; Altimetry; Southern Ocean.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00307/41863/41114.pdf

Coûts associés à la dégradation du milieu marin : marées noires et rejets illicites d’hydrocarbures. Sous-région marine Manche - Mer du Nord. Evaluation initiale DCSMM.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hay, Julien; Cujus, Alexia.
Tipo: Text
Palavras-chave: Manche; Mer du Nord; Marées noires; Rejets illicites; Hydrocarbures; Coût; Suivi; CSN; DCS; CROSS; POLMAR; CEDRE; Actions positives; Impacts.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00328/43914/43487.pdf

Pathologie des mollusques bivalves et protection des cheptels coquilliers
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Grizel, Henri.
Shellfish farms show a number of specificities, some of which are decisive in the triggering and spreading of infectious and non-infectious diseases. This chapter deals only with infectious diseases which are currently the major hazard in shellfish culture, due to their virulence but also to the insufficiency of available fighting means. The epidemiological analysis is essentially based on the example of French shellfish culture. But the conclusions that can be drawn are of general interest. We then tackle the therapeutic and prophylactic fighting means. This study highlights the specificities of epizooties in bivalve molluscs and the constraints raised by fighting against farm diseases in an open and fluid environment,  farming habits and the consumption...
Tipo: Text
Palavras-chave: Mesures zootechniques; Traitement maladies; Prophylaxies zoosanitaires; Diagnostic; Maladies infectieuses; Maladies; Bivalves; Mollusques; Pathologie.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/publication-6246.PDF

Report of the Saithe (Polliachius virens, L.) Otolith Exchange 2013
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mahe, Kelig; Sevin, Karine; Petursdottir, Groa; Finnbogadottir, Gudrun; Wilhelms, Ines; Beußel, Friederike; Bland, Barbara; Solbakken, Lisbet; Seim, Silje E.; Holm, Else; Mjanger, Hildegunn; Senneset, Harald; Ottesen, Merete V.; Skadal, Janicke.
The ICES Planning Group on Commercial Catch, Discards and Biological Sampling (PGCCDBS) identified the need of a Saithe (Polliachius virens) otolith exchange to take place in 2013. It was the second exchange after that’s of 2008. The IFREMER institute coordinated this exchange. A total of 295 fish was sampled from the Barent sea (ICES area : IIa, N=24), from the North Sea (ICES area : IV, N=34) and from the Western Scotland (ICES area : VIa, N=237). The length range of the fish was between 37 and 96 cm, with mean 60 cm. 13 readers from 5 countries (France, Germany, Iceland, Sweden &amp; Norway) were participated. Mean precision of age estimate for individual fish were Coefficient of Variation (CV) of 6.2% and percent agreement to modal age of 85.9. Among...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00185/29595/27962.pdf

Insight into Invertebrate Defensin Mechanism of Action OYSTER DEFENSINS INHIBIT PEPTIDOGLYCAN BIOSYNTHESIS BY BINDING TO LIPID II
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Schmitt, Paulina; Wilmes, Miriam; Pugniere, Martine; Aumelas, Andre; Bachere, Evelyne; Sahl, Hans-georg; Schneider, Tanja; Destoumieux-garzon, Delphine.
Three oyster defensin variants (Cg-Defh1, Cg-Defh2, and Cg-Defm) were produced as recombinant peptides and characterized in terms of activities and mechanism of action. In agreement with their spectrum of activity almost specifically directed against Gram-positive bacteria, oyster defensins were shown here to be specific inhibitors of a bacterial biosynthesis pathway rather than mere membrane-active agents. Indeed, at lethal concentrations, the three defensins did not compromise Staphylococcus aureus membrane integrity but inhibited the cell wall biosynthesis as indicated by the accumulation of the UDP-N-acetylmuramyl-pentapeptide cell wall precursor. In addition, a combination of antagonization assays, thin layer chromatography, and surface plasmon...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00014/12503/9369.pdf

Delayed mode quality control of Ovide Argo Data. Float WMO 5902299
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lagadec, Catherine; Thierry, Virginie.
This report presents the delayed mode analysis of an Argo float. Real time quality control flags are checked and interesting profiles are plotted.  The OW method (objective analysis) is used to detect a conductivity sensor drift and correct it, if any.
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00311/42186/41486.pdf

Termination 1 timing in radiocarbon-dated regional benthic delta O-18 stacks
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Stern, Joseph V.; Lisiecki, Lorraine E.
Benthic O-18 changes are often assumed to be globally synchronous, but studies comparing 2-9 radiocarbon-dated records over the most recent deglaciation (Termination 1) have proposed differences in the timing of benthic O-18 change between the Atlantic and Pacific, intermediate and deep, and North and South Atlantic. Because of the relatively small number of records used in these previous studies, it has remained unclear whether these differences are local or regional in scale. Here we present seven regional benthic O-18 stacks for 0-40 kyr B.P. that include 252 records with independent regional age models constrained by 852 planktonic foraminiferal C-14 dates from 61 of these cores. We find a 4000 year difference between the earliest termination onset in...
Tipo: Text
Palavras-chave: Termination 1; Regional stacks; Benthic delta O-18; Radiocarbon.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00289/40039/38763.pdf

La petite pêche en pays bigouden
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Girard, Sophie.
Ce premier rapport fournit un état de la flottille des canots en 1985 et de son évolution récente (1980-1985). Il fait la synthèse des données de base servant à décrire les entreprises de pêche (dimensions - emplois - activités). Ce travail devrait aboutir à la mise en place d'une typologie des entreprises de pêche comme outil d'analyse des coûts de production et servir de base à une étude des emplois en petite pêche. Parallèlement, il permet d'établir le bilan 1985 de la répartition des différents  métiers pratiqués par la flottille de canot, en mettant en évidence les principaux transferts d'activité survenus lors d'une période récente. Les informations contenues dans ce rapport proviennent d'une part de fichiers établis a l'échelle du Golfe de Gascogne...
Tipo: Text
Palavras-chave: SEM.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/rapport-4165.pdf

Résultats du REMI (REseau de surveillance MIcrobiologique) du Traict de Pen Bé (Loire-Atlantique) à la pointe du Payré (Vendée). Année 1994
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: IFREMER.
Le REMI est l'un des 3 réseaux de surveillance du milieu marin gérés par l'IFREMER. Il concerne la surveillance bactériologique des eaux littorales.  Historiquement, l'objectif principal de la surveillance bactériologique du milieu marin en France était la salubrité des bivalves pour la consommation humaine. En 1989, sa mission a été étendue à la surveillance de l'environnement. L'organisation actuelle du réseau répond à ces deux objectifs.  L'appréciation de la contamination bactériologique du milieu marin, et notamment des eaux conchylicoles, est basée sur la mesure des coliformes fécaux dans les coquillages. L'emploi de ces germes tests de contamination comme traceurs de pollution permet d'estimer l'importance de la "fécalisation" des eaux et donc les...
Tipo: Text
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00071/18270/15835.pdf

Tectonic and sedimentary architecture of the Karukéra spur: A record of the Lesser Antilles fore-arc deformations since the Neogene
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: De Min, L.; Lebrun, J. F.; Cornee, J. J.; Munch, P.; Leticee, J. L.; Quillevere, F.; Melinte-dobrinescu, M.; Randrianasolo, A.; Marcaillou, B; Zami, F.
The Karukéra spur is an easternmost submerged rise of the Lesser Antilles fore-arc in the Guadeloupe archipelago, culminating about 4000 m above the fore-arc basin 150 km west of the deformation front. The analysis of 3500 km 2D high-resolution multichannel seismic reflection and multibeam bathymetric data, and the study of 14 core samples, allow for the first time to reconstruct its sedimentary anatomy and tectonic evolution. Seven seismic units (Us1 to Us7) are evidenced, organized into four major depositional sequences separated by erosional surfaces. Units Us1 to Us4 thicken to the south-southeast on the spur. The sedimentary deposits rest upon a deeply eroded metamorphic basement of the Caribbean Plate as in La Désirade Island. Sequence 1 (units Us1...
Tipo: Text
Palavras-chave: Lesser Antilles; Fore-arc; Karukéra spur; Neogene; Extensional tectonics; Basal erosion.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00252/36372/34912.pdf

Planck 2018 results: IX. Constraints on primordial non-Gaussianity
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Akrami, Y.; Arroja, F.; Ashdown, M.; Aumont, J.; Baccigalupi, C.; Ballardini, M.; Banday, A. J.; Barreiro, R. B.; Bartolo, N.; Basak, S.; Benabed, K.; Bernard, J. -p.; Bersanelli, M.; Bielewicz, P.; Bond, J. R.; Borrill, J.; Bouchet, F. R.; Bucher, M.; Burigana, C.; Butler, R. C.; Calabrese, E.; Cardoso, J. -f.; Casaponsa, B.; Challinor, A.; Chiang, H. C.; Colombo, L. P. L.; Combet, C.; Crill, B. P.; Cuttaia, F.; De Bernardis, P.; De Rosa, A.; De Zotti, G.; Delabrouille, J.; Delouis, Jean Marc; Di Valentino, E.; Diego, J. M.; Dore, O.; Douspis, M.; Ducout, A.; Dupac, X.; Dusini, S.; Efstathiou, G.; Elsner, F.; Ensslin, T. A.; Eriksen, H. K.; Fantaye, Y.; Fergusson, J.; Fernandez-cobos, R.; Finelli, F.; Frailis, M.; Fraisse, A. A.; Franceschi, E.; Frolov, A.; Galeotta, S.; Galli, S.; Ganga, K.; Genova-santos, R. T.; Gerbino, M.; Gonzalez-nuevo, J.; Gorski, K. M.; Gratton, S.; Gruppuso, A.; Gudmundsson, J. E.; Hamann, J.; Handley, W.; Hansen, F. K.; Herranz, D.; Hivon, E.; Huang, Z.; Jaffe, A. H.; Jones, W. C.; Jung, G.; Keihanen, E.; Keskitalo, R.; Kiiveri, K.; Kim, J.; Krachmalnicoff, N.; Kunz, M.; Kurki-suonio, H.; Lamarre, J. -m.; Lasenby, A.; Lattanzi, M.; Lawrence, C. R.; Le Jeune, M.; Levrier, F.; Lewis, A.; Liguori, M.; Lilje, P. B.; Lindholm, V.; Lopez-caniego, M.; Ma, Y. -z.; Macias-perez, J. F.; Maggio, G.; Maino, D.; Mandolesi, N.; Marcos-caballero, A.; Maris, M.; Martin, Pg; Martinez-gonzalez, E.; Matarrese, S.; Mauri, N.; Mcewen, J. D.; Meerburg, P. D.; Meinhold, P. R.; Melchiorri, A.; Mennella, A.; Migliaccio, M.; Miville-deschenes, M. -a.; Molinari, D.; Moneti, A.; Montier, L.; Morgante, G.; Moss, A.; Munchmeyer, M.; Natoli, P.; Oppizzi, F.; Pagano, L.; Paoletti, D.; Partridge, B.; Patanchon, G.; Perrotta, F.; Pettorino, V.; Piacentini, F.; Polenta, G.; Puget, J. -l.; Rachen, J. P.; Racine, B.; Reinecke, M.; Remazeilles, M.; Renzi, A.; Rocha, G.; Rubino-martin, J. A.; Ruiz-granados, B.; Salvati, L.; Savelainen, M.; Scott, D.; Shellard, E. P. S.; Shiraishi, M.; Sirignano, C.; Sirri, G.; Smith, K.; Spencer, L. D.; Stanco, L.; Sunyaev, R.; Suur-uski, A. -s.; Tauber, J. A.; Tavagnacco, D.; Tenti, M.; Toffolatti, L.; Tomasi, M.; Trombetti, T.; Valiviita, J.; Van Tent, B.; Vielva, P.; Villa, F.; Vittorio, N.; Wandelt, B. D.; Wehus, I. K.; Zacchei, A.; Zonca, A.
We analyse the Planck full-mission cosmic microwave background (CMB) temperature and E-mode polarization maps to obtain constraints on primordial non-Gaussianity (NG). We compare estimates obtained from separable template-fitting, binned, and optimal modal bispectrum estimators, finding consistent values for the local, equilateral, and orthogonal bispectrum amplitudes. Our combined temperature and polarization analysis produces the following final results: (local)(NL) = -0.9 +/- 5.1 f NL local = - 0.9 +/- 5.1 ; f(NL)(equil) = -26 +/- 47 f NL equil = - 26 +/- 47 ; and f(NL)(ortho) = -38 +/- 24 f NL ortho = - 38 +/- 24 (68% CL, statistical). These results include low-multipole (4 &lt;= l&lt; 40) polarization data that are not included in our previous...
Tipo: Text
Palavras-chave: Cosmic background radiation; Cosmology: observations; Cosmology: theory; Early Universe; Inflation; Methods: data analysis.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00654/76635/77783.pdf

A compilation of global bio-optical in situ data for ocean-colour satellite applications - version two
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Valente, Andre; Sathyendranath, Shubha; Brotas, Vanda; Groom, Steve; Grant, Michael; Taberner, Malcolm; Antoine, David; Arnone, Robert; Balch, William M.; Barker, Kathryn; Barlow, Ray; Belanger, Simon; Berthon, Jean-francois; Besiktepe, Suikru; Borsheim, Yngve; Bracher, Astrid; Brando, Vittorio; Canuti, Elisabetta; Chavez, Francisco; Cianca, Andres; Claustre, Herve; Clementson, Lesley; Crout, Richard; Frouin, Robert; Garcia-soto, Carlos; Gibb, Stuart W.; Gould, Richard; Hooker, Stanford B.; Kahru, Mati; Kampel, Milton; Klein, Holger; Kratzer, Susanne; Kudela, Raphael; Ledesma, Jesus; Loisel, Hubert; Matrai, Patricia; Mckee, David; Mitchell, Brian G.; Moisan, Tiffany; Muller-karger, Frank; O'Dowd, Leonie; Ondrusek, Michael; Platt, Trevor; Poulton, Alex J.; Repecaud, Michel; Schroeder, Thomas; Smythe, Timothy; Smythe-wright, Denise; Sosik, Heidi M.; Twardowski, Michael; Vellucci, Vincenzo; Voss, Kenneth; Werdell, Jeremy; Wernand, Marcel; Wright, Simon; Zibordi, Giuseppe.
A global compilation of in situ data is useful to evaluate the quality of ocean-colour satellite data records. Here we describe the data compiled for the validation of the ocean-colour products from the ESA Ocean Colour Climate Change Initiative (OC-CCI). The data were acquired from several sources (including, inter alia, MOBY, BOUSSOLE, AERONET-OC, SeaBASS, NOMAD, MERMAID, AMT, ICES, HOT and GeP&amp;CO) and span the period from 1997 to 2018. Observations of the following variables were compiled: spectral remote-sensing reflectances, concentrations of chlorophyll a, spectral inherent optical properties, spectral diffuse attenuation coefficients and total suspended matter. The data were from multi-project archives acquired via open internet services or from...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00508/61937/66031.pdf