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Technical and physical challenges to achieve a regional simulation at multi-decadal scales: Applications to the Bay of Biscay. ArchiMer
Theetten, Sebastien; Vandermeirsch, Frederic; Assassi, Charefeddine; Charria, Guillaume.
Tipo: Text
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00195/30652/29120.pdf
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Large-scale genetic patchiness among NE Atlantic populations of the brittle star Ophiothrix fragilis ArchiMer
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 (< 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
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Analysis of shell colour determinism in the Manila clam Ruditapes philippinarum ArchiMer
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
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Routes of Agulhas rings in the southeastern Cape Basin ArchiMer
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
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Filets à Poissons plats. Occitanie. 2017. Observation des Marées au débarquement - OBSDEB ArchiMer
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
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Fat deposition and flesh quality in seawater reared, triploid brown trout (Salmo trutta) as affected by dietary fat levels and starvation ArchiMer
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...
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
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Abrupt response of chemical weathering to Late Quaternary hydroclimate changes in northeast Africa ArchiMer
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
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Filets à Céphalopodes. Méditerranée (Hors Corse). 2018. Observation des Marées au débarquement - OBSDEB ArchiMer
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
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Recherches sur les réactions écophysiologiques d'agarophytes des côtes françaises ArchiMer
Andriamampandry, A.; Asensi, A.; Delepine, R.; Dion, P..
Tipo: Text
Ano: 1979 URL: http://archimer.ifremer.fr/doc/00306/41692/40901.pdf
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Vibriosis in sea bass ArchiMer
Breuil, Gilles.
Tipo: Text
Ano: 1991 URL: http://archimer.ifremer.fr/doc/00271/38240/36423.pdf
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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 ArchiMer
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
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Synthèse des Pêcheries 2002 - Flotte mer du Nord-Manche-Atlantique ArchiMer
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
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Expédition antarctique française (1903-1905) commandée par le Dr Jean Charcot. Echinodermes ArchiMer
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
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Populations ichtyologiques de petits pélagiques. Sous-région marine Méditerranée occidentale. Evaluation initiale DCSMM. ArchiMer
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
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A bio-economic analysis of long term changes in the production of French fishing fleets operating in the Bay of Biscay ArchiMer
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
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VALDORA 2018. Etude de la perte de poids au jeûne sur deux classes de poids de dorades sauvages, Sparus aurata, maintenues en vivier ArchiMer
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
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Bilan des phénomènes d'eaux colorées recensés pour l'année 1980 ArchiMer
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
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Circulation and mixing in greater cook strait, new-zealand ArchiMer
Bowman, Mj; Kibblewhite, Ac; Murtagh, Ra; Chiswell, Sm; Sanderson, Bg.
Tipo: Text
Ano: 1983 URL: http://archimer.ifremer.fr/doc/00120/23125/20972.pdf
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Observing the Local Emergence of the Southern Ocean Residual-Mean Circulation ArchiMer
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
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Quelques possibilités d'uilisation des sardines de grande taille ArchiMer
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
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