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Registros recuperados: 26.605 | |
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Reveillon, Damien; Abadie, Eric; Sechet, Veronique; Brient, Luc; Savar, Veronique; Bardouil, Michele; Hess, Philipp; Amzil, Zouher. |
beta-N-methylamino-L-alanine (BMAA) is a neurotoxic non-protein amino acid suggested to be involved in neurodegenerative diseases. It was reported to be produced by cyanobacteria, but also found in edible aquatic organisms, thus raising concern of a widespread human exposure. However, the chemical analysis of BMAA and its isomers are controversial, mainly due to the lack of selectivity of the analytical methods. Using factorial design, we have optimized the chromatographic separation of underivatized analogues by a hydrophilic interaction chromatography coupled to tandem mass spectrometry (HILIC-MS/MS) method. A combination of an effective solid phase extraction (SPE) clean-up, appropriate chromatographic resolution and the use of specific mass spectral... |
Tipo: Text |
Palavras-chave: Cyanotoxins; BMAA; DAB; AEG; HILIC-MS/MS; Cyanobacteria; Bivalve mollusks; French Mediterranean. |
Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00245/35579/34112.pdf |
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Avedik, F.. |
Based on all available seismic refraction data, the seismic structure of the Western Approaches to the English Channel and the South Armorican continental shelf has been established. The correlation of seismic velocities showed a three-fold structure, related to geological layers as follows: 1. High-velocity, deep sequence (4.4-6.6km/sec): metamorphic basement and Lower to Middle Palaeozoic. 2. Intermediate sequence (3.6-4.3km/sec): Permo-Triassic (and Jurassic?) and possibly also Lower Cretaceous on the margin of the Western Approaches. 3. Upper sequence (1.9-3.6km/sec): Cretaceous and Cenozoic sediments. An acoustic unconformity appears to be present between the Upper sequence and the High velocity and Intermediate sequences. Different geomorphology... |
Tipo: Text |
Palavras-chave: Histoire Ifremer. |
Ano: 1975 |
URL: http://archimer.ifremer.fr/doc/1975/publication-5465.pdf |
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Boye, M.; Wake, B. D.; Lopez Garcia, P.; Bown, J.; Baker, A. R.; Achterberg, E. P.. |
Comprehensive synoptic datasets (surface water down to 4000 m) of dissolved cadmium (Cd), copper (Cu), manganese (Mn), lead (Pb) and silver (Ag) are presented along a section between 34A degrees S and 57A degrees S in the southeastern Atlantic Ocean and the Southern Ocean to the south off South Africa. The vertical distributions of Cu and Ag display nutrient-like profiles similar to silicic acid, and of Cd similar to phosphate. The distribution of Mn shows a subsurface maximum in the oxygen minimum zone, whereas Pb concentrations are rather invariable with depth. Dry deposition of aerosols is thought to be an important source of Pb to surface waters close to South Africa, and dry deposition and snowfall may have been significant sources of Cu and Mn at the... |
Tipo: Text |
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Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00139/25061/23170.pdf |
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Mercier, Herle. |
L'océan est mis en mouvement par deux moteurs: l'action du vent et les flux de chaleur à l'interface air-mer. Les études consacrées à la compréhension de la réponse de l'océan au forçage du vent, le premier moteur, ont été ces dernières décennies, avec succès, au centre des préoccupations des océanographes, Aux moyennes latitudes, les modèles numériques forcés par le vent reproduisent les courants de frontière Ouest tels que le Gulf Stream et, si la résolution spatiale est suffisante, les instabilités génèrent des structures tourbillonnaires qui sont semblables à celles observées dans l'océan réel et qui, bien que d'échelle spatiale plus petite, sont l'analogue des dépressions atmosphériques. C'est la prise de conscience que, dans l'océan, les transferts... |
Tipo: Text |
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Ano: 1993 |
URL: http://archimer.ifremer.fr/doc/1993/publication-7454.pdf |
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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 |
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Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00685/79748/82524.pdf |
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Gadaud, Véronique. |
L'ostréiculture, depuis une dizaine d'années, subit de graves crises dues à des épizooties successives. La première, causée par Marteilia refringens (1969 à 1975), n'a pas atteint les centres vitaux de l 'ostréiculture . La deuxième, due à Bonamia ostreae, mise en évidence en juin 1979 à l'Ile Tudy, touche presque tous les centres ostréicoles bretons (captage, élevage, affinage) , réduisant considérablement la production (- de 3 000 t en 1981) . Dans le cadre de l'étude de cette maladie, nous avons réalisé des essais d' infestations.Les trois techniques de contamination employées sont : la méthode de juxtaposition (proximiy method) , la méthode des broyats ( feeding method) et l'intervention d'un hôte intermédiaire. Pour cela, nous avons réparti des... |
Tipo: Text |
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Ano: 1981 |
URL: http://archimer.ifremer.fr/doc/00450/56191/57747.pdf |
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Holme, Na. |
The most noticeable changes in benthos have been in the degree of penetration of species from the Celtic Sea into the western Channel. There may also have been an indirect effect on beds of Ophiothrix fragilis off Plymouth through fluctuations in populations of Luidia ciliaris , which preys on Ophiothrix . Other fluctuations in the benthos relating to sea temperature, exceptionally cold winters, immigrant species, dinoflagellate blooms, and oil pollution incidents have mainly affected the eastern Channel or inshore waters in the west, leaving offshores areas of the western Channel largely unaffected. There is now growing evidence of harmful effects of heavy fishing gear on the offshore benthos in parts of the western Channel. |
Tipo: Text |
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Ano: 1983 |
URL: http://archimer.ifremer.fr/doc/00247/35785/34298.pdf |
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Le Berre, Yves. |
La composition des conserves de "Poisson au naturel" se définit d'elle-même : du poisson varié capturé par les chalutiers, préparé et mis en boîtes pour être accompagné d'une sauce "au naturel" constituée par un jus légèrement salé, facultativement additionné d'un peu de vinaigre et de produits aromatiques naturels. Plus récentes et de moindre renom que les fabrications traditionnelles de sardine et de thon, ces conserves n'en ont pas moins acquis un développement important et leur place sur le marché peut désormais être considérée comme solidement assise. Le tableau 1 donne un aperçu des tonnages de poisson intervenant dans ces fabrications. |
Tipo: Text |
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Ano: 1965 |
URL: http://archimer.ifremer.fr/doc/1965/publication-7234.pdf |
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Camoin, G; Cabioch, G; Eisenhauer, A; Braga, J; Hamelin, B; Lericolais, Gilles. |
In situ microbialites occurring in reef rocks dredged between 80 and 130 in water depth on the modern fore-reef slopes of Tahiti and the Marquesas islands yield ages ranging from 17,100 2900 to 4410 2250 years BP, suggesting that they played a prominent role during the last deglacial sea level rise. Microbialites developed in both shallow and deep water depositional environments where they characterize various zones of the reef tracts (reef crests, upper reef slopes, deep fore-reef slopes), reflecting contrasting scenarios of microbialite development involving ''reefal microbialites'' in shallow-water settings and ''slope microbialites'' that formed in environments deeper than 1020 in and extending down to more than 100 m. Reefal microbialites... |
Tipo: Text |
Palavras-chave: Sea level changes; Nutrients; French polynesia; Holocene; Last deglaciation; Microbialites; Coral reefs. |
Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-4204.pdf |
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Olagnon, Michel; Becq, Françoise; Charriez, Patrick. |
To design offshore structures, to prepare operations at sea and unusual transportations on marine routes, to assess safety levels with respect to marine climate, one needs practical data describing the wave, wind and current conditions that may occur. This essential information is unfortunately very seldom readily available exactly for the geographical area of interest. Where to look for it, how to evaluate and choose amongst what one may find, how to get aware of its adequation and drawbacks for the projected use, whom to call for help, as many questions to which this report is expected to bring some answers. Engineers in charge of coastal or offshore projects, logistics managers implied in sea transportations, underwriters, planners for shore equipments... |
Tipo: Text |
Palavras-chave: Offshore engineering; Water waves; Ocean currents; Meteorological data. |
Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/1992/rapport-988.pdf |
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Bouilly, Karine; Leitao, Alexandra; Mccombie, Helen; Chaves, R.; Guedes Pinto, H; Boudry, Pierre; Lapegue, Sylvie. |
In the Pacific oyster, Crassostrea gigas hypodiploid aneuploid cells with 2n=19, 18 or 17 chromosomes have regularly been reported. There is a negative correlation between somatic aneuploidy and growth rate in oysters (Leitão et al., 2001a) as well as evidence for a genetic basis (Leitão et al., 2001b). Furthermore, non-random chromosome loss has been demonstrated in aneuploid karyotypes of C. gigas using the G-banding technique (Leitão et al., 2001c). This poster summarises different studies used to investigate the effects of the herbicide atrazine on the level of aneuploidy in this species |
Tipo: Text |
Palavras-chave: Genetic; Aneuploidy; Toxicology; Impact; Atrazine; Crassostrea gigas; Pacific oysters. |
Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/2004/acte-3489.pdf |
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Fichaut, Michele; Balopoulos, Efstathios; Dooley, Harry; Garcia-fernandez, Maria; Iona, Athanasia; Jourdan, Didier; Baudet, Laurent; Maillard, Catherine. |
The MEDATLAS hydrological data base, has been created by a consortium of several data centers, including HNODC (Greece), IEO (Spain), EPSHOM/CMO (French navy), IFREMERJSISMER the coordinating center (France) and ICES (Denmark) as the supervisor of the quality control procedure, in the frame of the MEDATLAS project. This project is a MAST supporting initiative for ocean data and information management. Its objectives were to assemble a comprehensive data base of temperature and salinity profiles collected in the Mediterranean sea by t he scientific laboratories and the navies, to check them for quality and to revise the climatological statistics by using this updated date set. An important part of the work has been devoted to define a common protocol to... |
Tipo: Text |
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Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00251/36211/34756.pdf |
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Arnaud, Christophe; Faury, Nicole; Bouquet, Jean-paul. |
The Marennes-Oléron is a well known cupped oyster (Crassostrea gigas) and mussel (Mytilus edulis) reproduction area. Every year, a monitoring of the reproduction of these two species is carried out on behalf of the Regional Shellfish Culture Section of Marennes-Oléron. This monitoring aims to determine the periods of larval emission in order to let the professionals know about the best collection times This study presents the main results obtained in 1999 and compares them with those obtained in 1997 and 1998. The year 1999 showed good results as far as larval emission and development are concerned in both oysters and mussels. The comparison of the three consecutive years shows the disparity of larval evolutions. |
Tipo: Text |
Palavras-chave: Marennes Oléron; Captage; Larves; Mytilus edulis; Moules; Crassostrea gigas; Huîtres; Reproduction. |
Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/1999/rapport-6571.pdf |
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Tovar, Dariel. |
The interest in probiotics for aquaculture is increasing rapidly. In the present work we evaluated the potential of some yeast to induce the larvae gut maturation in sea bass larvae Dicentrarchus labrax. The production of polyamines putrescine, spermidine and spermine was quantified in ten yeast strains using high performance liquid chromatography (HPLC). Afterwards, fluorescently labelled yeast adhesion to the intestine of sea bass larvae and the spotted sand bass (Paralabrax maculatofasciatus) was evaluated by fluorescent microscopy. Two of them, CBS 8339 strain (Debaryomyces hansenii) and X2180 strain (Saccharomyces cerevisiae) produce the polyamines of our interest. The same strains showed the best adhering capabilities to the sea bass and spotted sand... |
Tipo: Text |
Palavras-chave: Ontogeny; Digestive enzymes; Fish larvae; Polyamines; Probiotics; Ontogénèse; Enzymes digestives; Larves de poisson; Polyamines; Probiotiques. |
Ano: 2002 |
URL: http://archimer.ifremer.fr/doc/2002/these-103.pdf |
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Rondelaud, D. |
The treated habitats have not been recolonized by Lymnaea truncatula . Four aquatic snail species showed an increase in their numbers: L. glabra in the stations of Haute-Vienne, L. glabra, Physa acuta, P. hypnorum and Planorbis rotundatus in the habitats of Indre. The numbers of L. glabra and P. acuta reached their maximum on the third year and decreased thereafter; those of P. hypnorum and P. rotundatus slightly increased from the fourth or the fifth years treatment. The colonization of L. truncatula habitats was incomplete and did not reach over 50% of the surface for L. glabra and P. acuta , 20% for P. hypnorum and P. rotundatus . The bivalve Pisidium casertanum did not recolonize treated habitats. There were no modifications in the numbers of... |
Tipo: Text |
Palavras-chave: Physa; Lymnaea; Mollusca; Biological control; Chemical control; Population density; Population dynamics; Freshwater molluscs. |
Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/1991/acte-1715.pdf |
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Nurnberg, D; Tiedemann, R. |
On the basis of two sedimentary records from the central Sea of Okhotsk, we reconstruct the closely coupled glacial/interglacial changes in terrigenous flux, marine productivity, and sea ice coverage over the past 1.1 Myr. The correspondance of our sedimentary records to the China loess grain size record ( China loess particle timescale, CHILOPARTS) suggests that environmental changes in both the Sea of Okhotsk area and in SE Asia were closely related via the Siberian atmospheric high-pressure cell. During full glacial times our records point to a strong Siberian High causing northerly wind directions, the extension of the sea ice cover, and a reduced Amur River discharge. Deglacial maxima of terrigenous flux were succeeded by or synchronous to... |
Tipo: Text |
Palavras-chave: Sea of Okhotsk; Paleoproductivity; Terrigenous flux; Sea ice dynamics; Stratigraphy. |
Ano: 2004 |
URL: https://archimer.ifremer.fr/doc/00228/33934/32231.pdf |
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Registros recuperados: 26.605 | |
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