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| Registros recuperados: 26.605 | |
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| Ubertini, Martin; Lefebvre, Sebastien; Gangnery, Aline; Grangere, Karine; Le Gendre, Romain; Orvain, Francis. |
| The high degree of physical factors in intertidal estuarine ecosystem increases material processing between benthic and pelagic compartments. In these ecosystems, microphytobenthos resuspension is a major phenomenon since its contribution to higher trophic levels can be highly significant. Understanding the sediment and associated microphytobenthos resuspension and its fate in the water column is indispensable for measuring the food available to benthic and pelagic food webs. To identify and hierarchize the physical/biological factors potentially involved in MPB resuspension, the entire intertidal area and surrounding water column of an estuarine ecosystem, the Bay des Veys, was sampled during ebb tide. A wide range of physical parameters (hydrodynamic... |
| Tipo: Text |
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| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00090/20126/17775.pdf |
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| Baque, M.; Dobrijevic, M.; Le Postollec, A.; Moreau, T.; Faye, C.; Vigier, F.; Incerti, S.; Coussot, G.; Caron, J.; Vandenabeele Trambouze, Odile. |
| Several instruments based on immunoassay techniques have been proposed for life-detection experiments in the framework of planetary exploration but few experiments have been conducted so far to test the resistance of antibodies against cosmic ray particles. We present several irradiation experiments carried out on both grafted and free antibodies for different types of incident particles (protons, neutrons, electrons and C-12) at different energies (between 9 MeV and 50 MeV) and different fluences. No loss of antibodies activity was detected for the whole set of experiments except when considering protons with energy between 20 and 30 MeV (on free and grafted antibodies) and fluences much greater than expected for a typical planetary mission to Mars for... |
| Tipo: Text |
Palavras-chave: Astrobiology; Biochip; Cosmic rays; Search for extraterrestrial life. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00366/47678/47809.pdf |
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| Meuriot, Eric; Maucorps, A. |
| Fishing regulations in waters under the responsibility of the EEC mainly concern three techniques of site development: - catch quotas by species and by area (TAC, a word adapted from the English Total Allowable Catch); - the definition of the technical characteristics of the fishing devices used (meshing, type of trawl,...); - setting a minimum commercial size for each species. The regulations of meshing and other constraints relating to the technical characteristics of the fishing devices aim to modify the composition of the catches by age class. The TACs are a technique for controlling the level of exploitation of the stocks. Controlling the fishing effort that they generate is carried out indirectly in the short or mid term. For many years now,... |
| Tipo: Text |
Palavras-chave: SEM. |
| Ano: 1986 |
URL: http://archimer.ifremer.fr/doc/1986/rapport-2509.pdf |
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| Boutron, Olivier; Bertrand, Olivier; Fiandrino, Annie; Hoehener, Patrick; Sandoz, Alain; Cherain, Yves; Coulet, Eric; Chauvelon, Philippe. |
| The spatiotemporal structure of wind-driven circulation patterns and associated water exchanges can drive important bio-hydrodynamic interactions in shallow lagoons. The Vaccares lagoon system is a complex shallow hydrosystem located in the central part of the Rhone Delta (France). It is internationally recognized as part of a biosphere reserve within the framework of UNESCO's Man and Biosphere Programme, and as a RAMSAR site. Due to its frequent occurrence in this area, and considering the shallowness of the Vaccares lagoon system, wind is assumed to play a major role in the hydrodynamic and biological processes. In this study, a hydrodynamic model was developed to investigate the structure of wind-driven circulations in the Vaccares lagoon system, to... |
| Tipo: Text |
Palavras-chave: Coastal lagoon; Mathematical model; Hydrodynamics; Calibration; Validation; Wind-driven circulation. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00303/41382/40558.pdf |
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| Judas, Antoine. |
| Dans le cadre du programme d'études pluridisciplinaire du contrat de baie mis en œuvre par la Communauté Urbaine de Brest, un travail d'observation intégrant certains paramètres biologiques (Indices Gonadique et de Réplétion), écotoxicologiques (fécondation et développement larvaire) et génétiques a été mené au laboratoire d'écologie benthique de l'Université des Sciences de Brest et au laboratoire d'écotoxicologie de l'IFREMER - Brest sur les oursins de l'espèce Sphaerechinus granularis de la rade en tant qu'indicateurs biologiques de pollution. Le site de l'archipel des Glénan (Finistère-Sud) a été choisi à titre de référence. Il ressort de l'étude que la station placée dans le goulet, en communication directe avec la mer d'Iroise, présente des résultats... |
| Tipo: Text |
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| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/00040/15137/12476.pdf |
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| Urios, Laurent; Agogue, Hélène; Lesongeur, Francoise; Stackebrandt, Erko; Lebaron, Philippe. |
| A novel aerobic, Gram-negative bacterium, named 13IX/A01/164(T), was isolated from surface waters in the coastal north-western Mediterranean Sea. Cells were motile, straight rods, 2-5 mu m long and 0-2 mu m wide, and formed orange colonies on marine agar medium. The G+C content of the genomic DNA of strain 13IX/A01/164T was 42 mol%. Phylogenetic analysis of the 16S rRNA gene sequence placed the strain in the phylum Bacteroidetes within the family Crenotrichaceae. On the basis of 16S rRNA gene sequence comparison and physiological and biochemical characteristics, this isolate represents a novel species of a new genus, for which the name Balneola vulgaris gen. nov., sp. nov. is proposed. The type strain of Balneola vulgaris... |
| Tipo: Text |
Palavras-chave: Mediterranean sea; Coastal waters; Microbiology; Physiology; Biochemistry; Gene sequence; Balneola vulgaris. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-2126.pdf |
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| Dorel, Didier; Desaunay, Yves. |
| The abundance of sole juveniles was estimated in October 1986 and 1987 for three nursery grounds which contribute to the stock of the Bay of Biscay (Bay of Vilaine : 332 km2, Pertuis Breton : 264 km2, Pertuis d'Antioche : 276 km2). Topography and sediments induce differences in sole distribution. The densities of juveniles are highest in both Pertuis, by x 6 to x 20 compared to the Vilaine. The interannual variation of the mean densities is opposite in the northern zone (x 0,66) and in both southern zone (x 2,13). The mean lengths of 0-group are different between the three sites ans between years. The contribution of a given nursery ground to the stock is not merely proportional to its surface and each of the nurseries may have its own dynamics. The final... |
| Tipo: Text |
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| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/00394/50570/51261.pdf |
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| Antona, Martine. |
| Sur un plan strictement économique, une augmentation de production équivaut à une baisse des prix et des marges, suivie d'une augmentation de la taille des entreprises. On observe donc, à long terme, des entreprises qui augmentent leur production en intensifiant leur travail, pour compenser une diminution des marges (c'est le phénomène d'accumulation) ; on assiste ensuite à une baisse des coûts de production, ce qui permet de réaugmenter les marges par unité produite (ce sont les économies d'échelle). [OCR NON CONTRÔLE] |
| Tipo: Text |
Palavras-chave: SEM. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/1992/acte-4237.pdf |
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| Anschutz, P; Blanc, G. |
| The 23,000 year old sediments of the Atlantis II Deep rest on a basaltic substratum and are overlaid by a dense and hot brine pool. The facies of the lower sequence of the West basin consists essentially of bioclastic and detrital particles (DOP facies). The primary calcite and aragonite of planktonic tests of the DOP facies have been transformed into Ca-, Mg-, Mn-, and Fe-carbonate solid solutions. Pyrite amounts to about 1-2% (wt) at the bottom of the sedimentary series, and as much as 20% (wt) in the upper part of the sequence. These high iron - and manganese - earing minerals are the product of early diagenetic processes in an environment favourable to bacterial activity, to which biogenic and detrital particles, organic matter, and iron and manganese... |
| Tipo: Text |
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| Ano: 1995 |
URL: http://archimer.ifremer.fr/doc/00097/20863/18481.pdf |
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| Faggion, Sara; Vandeputte, Marc; Vergnet, Alain; Clota, Frederic; Blanc, Marie-odile; Sanchez, Pierre; Ruelle, Francois; Allal, Francois; Wang, Hanping. |
| The European sea bass (Dicentrarchus labrax) exhibits female-biased sexual size dimorphism (SSD) early in development. New tagging techniques provide the opportunity to monitor individual sex-related growth during the post-larval and juvenile stages. We produced an experimental population through artificial fertilization and followed a rearing-temperature protocol (~16°C from hatching to 112 days post-hatching, dph; ~20°C from 117 to 358 dph) targeting a roughly balanced sex ratio. The fish were tagged with microchips between 61 and 96 dph in five tagging trials of 50 fish each; individual standard length (SL) was recorded through repeated biometric measurements performed between 83 to 110 dph via image analyses. Body weight (BW) was modelled using the... |
| Tipo: Text |
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| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00691/80288/83391.pdf |
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| L'année 1987, troisième année de fonctionnement de l'IFREMER a permis la poursuite des actions décidées lors du plan à moyen terme couvrant la période 1983-1988. La seconde étape de la vie de l'établissement, qui correspondra au plan à moyen terme couvrant la période 1989-1993, se prépare en vue de l'adaptation des divers programmes à l'ouverture du marché unique européen. Au cours de cette période (1983-1988) qui coïncide également avec la durée du IXe plan, l'IFREMER, dans les trois grands domaines d'activités qui sont les siens - ressources vivantes, ingénierie et technologie, environnement et recherches océaniques - a répondu aux objectifs fixés. [OCR NON CONTRÔLE] |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1987 |
URL: http://archimer.ifremer.fr/doc/1987/rapport-4837.PDF |
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| Montanie, Helene; Ory, Pascaline; Orvain, Francis; Delmas, Daniel; Dupuy, Christine; Hartmann, Hans J.. |
| In shallow macrotidal ecosystems with large intertidal mudflats, the sediment-water coupling plays a crucial role in structuring the pelagic microbial food web functioning, since inorganic and organic matter and microbial components (viruses and microbes) of the microphytobenthic biofilm can be suspended toward the water column. Two experimental bioassays were conducted in March and July 2008 to investigate the importance of biofilm input for the pelagic Microbial and Viral Loops. Pelagic inocula (< 0.6 μ- and < 10 μ filtrates) were diluted either with < 30 kDa-ultrafiltered seawater or with this ultrafiltrate enriched with the respective size-fractionated benthic biofilm or with < 30 kDa-benthic compounds (BC). The kinetics of heterotrophic... |
| Tipo: Text |
Palavras-chave: Mudflats; Virus; Bacteria; HNF; Coastal water. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00166/27691/25883.pdf |
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| Yassaa, Noureddine; Peeken, Ilka; Zoellner, Eckart; Bluhm, Katrin; Arnold, Steve; Spracklen, Dominick; Williams, Jonathan. |
| Laboratory incubation experiments and shipboard measurements on the Southern Atlantic Ocean have provided the first evidence for marine production of monoterpenes. Nine marine phytoplankton monocultures were investigated using a GC-MS equipped with an enantiomerically-selective column and found to emit at rates, expressed as nmol C(10)H(16) (monoterpene) g [chlorophyll a](-1) day(-1), from 0.3 nmol g [chlorophyll a](-1) day(-1) for Skeletonema costatum and Emiliania huxleyi to 225.9 nmol g [chlorophyll a](-1) day(-1) for Dunaliella tertiolecta. Nine monoterpenes were identified in the sample and not in the control, namely: (-)-/(+)-pinene, myrcene, (+)-camphene, (-)-sabinene, (+)-3-carene, (-)-pinene, (-)-limonene and p-ocimene. In addition, shipboard... |
| Tipo: Text |
Palavras-chave: Algae; Isoprene; Organic trace gases; Southern Atlantic Ocean. |
| Ano: 2008 |
URL: https://archimer.ifremer.fr/doc/00238/34896/33131.pdf |
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| Desbrosses, Pierre. |
| Their reproduction period, early stages and biology are known through previous works (cf. especially the works by L. Bianco (1), R. S. Clark (2), Ehrenbaum (3), etc.). On the contrary, their growth and longevity, their age and size when reaching their first sexual maturity, the variation of the number of their vertebrae, are, to our knowledge, not or hardly known. We aimed to fill this gap, at least partially, with this work. Concurrently, we made an inventory of the North Atlantic stock over the winter 1932-1933. |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1933 |
URL: http://archimer.ifremer.fr/doc/1933/publication-5822.pdf |
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| Catherine, Martial; Blateau, Dominique; Mazurie, Joseph; Le Bec, Claude. |
| La recrudescence du ver Polydora dans les coquilles d'huîtres creuses observée dès l'été 1988 a pour principale conséquence le développement parfois très important de formations variqueuses et des chambres à vase à l'intérieur des huîtres, ce qui est très préjudiciable à leur qualité commerciale. Le bilan de l'infestation des coquilles d'huîtres par le ver Polydora sur le littoral normand et atlantique en mai et juin 1989 montre que les secteurs ostréicoles les plus touchés se situent à proximité de la Loire et de la Vilaine. |
| Tipo: Text |
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| Ano: 1990 |
URL: http://archimer.ifremer.fr/doc/00081/19184/16779.pdf |
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| Lepinay, Alexandra; Capiaux, Hervé; Turpin, Vincent; Mondeguer, Florence; Baron, Regis; Lebeau, Thierry. |
| The marine diatom Haslea ostrearia produces a water-soluble blue-pigment named marennine of economic interest (e.g. in aquaculture for the greening of oysters). Up to date the studies devoted to ecological conditions under which this microalga develops never took into account the bacterial-H. ostrearia relationships. In this study the bacterial community was analysed by PCR-TTGE before and after H. ostrearia isolation cells recovered from 4 localities, to distinguish the relative part of the biotope and the biocenose and eventually to describe the temporal dynamic of the structure of the bacterial community. The bacterial structure of the phycosphere differed strongly from that of the bulk sediment. The similarity between bacteria recovered from the... |
| Tipo: Text |
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| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00342/45365/44861.pdf |
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| Registros recuperados: 26.605 | |
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