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| Registros recuperados: 26.605 | |
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| Princz, D; Menesguen, A; Glemarec, M. |
| The temporal evolution of the Amphiura filiformis community of two stations in the Bay of Concarneau was followed during a period of ten years (1970-1979). A concomitance has been found between the demographic fluctuations of the community and the effects of climatic and hydrodynamic factors occurring in the bay throughout the observation period. At the end of the decade a decline of the Amphiura filiformis population and some qualitative changes in the community are observed. |
| Tipo: Text |
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| Ano: 1983 |
URL: http://archimer.ifremer.fr/doc/00247/35799/34312.pdf |
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| Christie, H. |
| Natural variations were found to be governed by key species which structured the community. Of more than 60 species found, ca 10 were important in terms of abundance. Very few species exhibited stable abundance, and the community was dominated by annual cycles in populations mainly provided by seasonal settlement followed by predation and grazing, notably by Asterias rubens . Exclusion of this species lead to dramatic structral changes on artificial panels. Variation in abundance was analyzed using harmonic series plots. Models were produced for the most important species, and gave acceptable predictions when tested against the following year's data. Cyclic patterns appear annually, but suggestions long term trends were found to slightly alter this annual... |
| Tipo: Text |
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| Ano: 1983 |
URL: http://archimer.ifremer.fr/doc/00247/35792/34305.pdf |
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| Bompard, Guillaume; Rabeharivelo, Gabriel; Frank, Marie; Cau, Julien; Delsert, Claude; Morin, Nathalie. |
| Ran is an essential GTPase that controls nucleocytoplasmic transport, mitosis, and nuclear envelope formation. These functions are regulated by interaction of Ran with different partners, and by formation of a Ran-GTP gradient emanating from chromatin. Here, we identify a novel level of Ran regulation. We show that Ran is a substrate for p21-activated kinase 4 (PAK4) and that its phosphorylation on serine-135 increases during mitosis. The endogenous phosphorylated Ran and active PAK4 dynamically associate with different components of the microtubule spindle during mitotic progression. A GDP-ound Ran phosphomimetic mutant cannot undergo RCC1-mediated GDP/GTP exchange and cannot induce microtubule asters in mitotic Xenopus egg extracts. Conversely,... |
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| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00014/12502/9353.pdf |
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| Henckel, Laura; Meynard, Christine N.; Devictor, Vincent; Mouquet, Nicolas; Bretagnolle, Vincent. |
| The relative contribution of ecological processes in shaping metacommunity dynamics in heavily managed landscapes is still unclear. Here we used two complementary approaches to disentangle the role of environment and spatial effect in farmland bird community assembly in an intensive agro-ecosystem. We hypothesized that the interaction between habitat patches and dispersal should play a major role in such unstable and unpredictable environments. First, we used a metacommunity patterns analysis to characterize species co-occurrences and identify the main drivers of community assembly; secondly, variation partitioning was used to disentangle environmental and geographical factors (such as dispersal limitation) on community structure and composition. We used... |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00485/59656/62690.pdf |
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| Joubin, L.. |
| La collection de Brachiopodes qui m'a été remise pour en faire l'étude ne comprend qu'un petit nombre d'échantillons. Ce qui caractérise l'ensemble de ces animaux c'est leur petite taille ; beaucoup d'entre eux, il est vrai, sont des jeunes et par conséquent n'ont pas atteint leur dimension définitive ; mais d'autres sont adultes, contiennent des glandes génitales développées, et sont arrivés, ou à peu près, à leur taille complète. Si ce caractère est réellement propre aux Brachiopodes de l'Antarctique, s' il n'est pas dû simplement à l'insu ffisance des documents qu'il m'a été possible d'examiner, il est d'un grand intérêt, car à lui seul il suffit pour séparer nettement la faune des Brachiopodes Antarctiques de celle des Brachiopodes Magellaniques qui,... |
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| Ano: 1901 |
URL: http://archimer.ifremer.fr/doc/1901/publication-7359.pdf |
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| Janquin, Marie-andree; Degros, N; Delesmont, Régis; Delattre, J.m.; Lepercq, E.; Grossel, Hubert; Le Fevre-lehoerff, Geneviève; Derrien, A.; Dewarumez, Jean-marie; Prygiel, M.; Menu, D.. |
| Le présent rapport de travail présente les résultats obtenus pour la période novembre 1983 - octobre 1984 devant la centrale de Gravelines. La surveillance écologique du site consiste à observer le pélagos et le benthos, en liaison avec les variations naturelles et celles dues au fonctionnement de la centrale du milieu physique et chimique, et à déceler d'éventuels changements dans la qualité et la biomasse des écosystèmes. Les résultats concernent les domaines d'études suivants - météorologie, - hydrologie, - microbiologie, - phytoplancton, - zooplancton, - benthos intertidal et subtidal. |
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| Ano: 1985 |
URL: http://archimer.ifremer.fr/doc/00005/11580/8205.pdf |
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| Okayasu, Sana; Schoolenberg, Machteld; Alkemade, Rob; Den Belder, Eefje; Pereira, Henrique; Lundquist, Carolyn; Cheung, William; Rondinini, Carlo; Halouani, Ghassen; Hyejin, Kim; Miller, Brian; Hirsch, Tim; Abbasov, Rovshan; Arneth, Almut; Diaw, Mariteuw Chimè; Eddy, Tyler; Harfoot, Michael; Hasegawa, Tomoko; Hickler, Thomas; Hill, Samantha; Humpenöder, Florian; Johnson, Justin; Kok, Marcel; Leadley, Paul; Leclere, David; Navarro, Laetitia; Ohashi, Haruka; Peterson, Garry; Schipper, Aafke; Shin, Yunne-jai; Stehfest, Elke; Visconti, Piero; Van Vuuren, Detlef. |
| A three-day workshop on ‘Global Modelling of Biodiversity and Ecosystem Services’, was held in the Hague, Netherlands, from 24th to 26th June 2019. The workshop, attended by 35 modelling and scenario-building experts, was organised on behalf of the former IPBES1expert group on scenarios and models of the first IPBES work programme by its interim technical support unit, and hosted by the PBL Netherlands Environmental Assessment Agency. The workshop drew on the ‘nature futures’ participatory scenario-building exercise initiated by the IPBES expert group on scenarios and models, and other biodiversity modelling initiatives such as the ISIMIP project2 working on adding biodiversity to the Shared Socioeconomic Pathways (SSPs) scenarios framework, the 'bending... |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00663/77481/79211.pdf |
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| Dosdat, Antoine; Metailler, Robert; Desbruyeres, Elisabeth; Huelvan, Christine. |
| Brown trout and rainbow trout (average weight 100 g) were reared in fresh water at 12 degrees C under the same conditions before transferring brown trout to sea water, in order to compare phosphorus utilisation in both species. Apparent phosphorus availability, orthophosphate excretion and phosphorus accretion in the fish were directly determined. Thus, actual phosphorus mass balance was built. Rainbow trout raised in fresh water had a higher phosphorus retention coefficient (maximum 50 %) than brown trout reared in fresh water (maximum 45 %). Transferring brown trout to sea water induced a reduction in phosphorus retention (maximum 39 %), Orthophosphate excretion, ranging 7-20 mg phosphorus per kg wet weight per day, represented 10-20 % of ingested... |
| Tipo: Text |
Palavras-chave: Oncorhynchus mykiss; Salmo trutta; Excrétion; Digestibilité; Phosphore; Oncorhynchus mykiss; Salmo trutta; Excretion; Digestibility; Phosphorus intake. |
| Ano: 1998 |
URL: https://archimer.ifremer.fr/doc/1998/publication-876.pdf |
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| Arnaud, Christophe; Fillon, Alain. |
| Le littoral charentais-maritime présente, dans sa partie nord entre l'estuaire de la Charente et la limite nord du département (île de Ré comprise), plusieurs sites intéressant l'ostréiculture pour le captage de juvéniles, dont le centre réputé de Fouras. Pour aider la profession, et selon son souhait, une assistance est fournie par l'IFREMER qui recherche les périodes d'émission de larves d'huîtres creuses afin d'informer les ostréiculteurs des époques les plus propices au captage. Contractualisé pour la première fois en 1996, puis en 1997, entre la SRC RE-CENTRE-QUEST et l'IFREMER, ce travail a été effectué à nouveau en 1998, par le laboratoire côtier DEL de La Rochelle et par la SRC, suite au renouvellement de ce contrat. La nouveauté de cette année est... |
| Tipo: Text |
Palavras-chave: Reproduction; Naissain; Huître creuse; Crassostrea gigas; Fouras; Charente-Maritime. |
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/00074/18492/16035.pdf |
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| Marchand, Philippe. |
| Position du problème : Il s'agit de confiner des poissons, par exemple à des fins aquacoles, dans un certain volume. Comment sectoriser des aires d'élevage dans un plan d'eau? La solution la plus simple est le filet mais son utilisation pose un certain nombre de problèmes: entretien et durée de vie. |
| Tipo: Text |
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| Ano: 1973 |
URL: http://archimer.ifremer.fr/doc/00151/26195/24214.pdf |
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| Le Moine Bauer, Sven; Sjøberg, Andreas Gilje; L'Haridon, Stephane; Stokke, Runar; Roalkvam, Irene; Steen, Ida Helene; Dahle, Håkon. |
| A bacterial strain, designated BAR1T, was isolated from a microbial mat growing on the surface of a barite chimney at the Loki’s Castle Vent Field, at a depth of 2216 m. Cells of strain BAR1T were rod-shaped, Gram-reaction-negative and grew on marine broth 2216 at 10–37 °C (optimum 27–35 °C), pH 5.5–8.0 (optimum pH 6.5–7.5) and 0.5–5.0 % NaCl (optimum 2 %). The DNA G+C content was 57.38 mol%. The membrane-associated major ubiquinone was Q-10, the fatty acid profile was dominated by C18 : 1ω7c (91 %), and the polar lipids detected were phosphatidylcholine, phosphatidylglycerol, phosphatidylethanolamine, one unidentified aminolipid, one unidentified lipid... |
| Tipo: Text |
Palavras-chave: Roseobacter; Alphaproteobacteria; Piezophilic; Isolate; Deep-sea; Hydrothermal vent. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00482/59323/62117.pdf |
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| Marcaillou Le Baut, C; Bardouil, Michele; Bocquene, Gilles; Le Dean, Loic; Truquet, Philippe. |
| This work is the preliminary synthesis of some toxicological tests conducted on three pesticides. This recapitulation would not have been possible without the contribution of our trainees, Misses V. Perles and H. Le Boulicot and MM. M. Falchier and G. Gaty who contributed largely to this study, supervised by the laboratory staff. The obtained results cannot be considered as definitive. The urge to answer the needs did not leave us enough time to fine tune and/or complete the results; for example we still have not determined the lethal dose for 50% of the individuals. [...] |
| Tipo: Text |
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| Ano: 1983 |
URL: https://archimer.ifremer.fr/doc/1983/rapport-4575.pdf |
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| Blanc, Frederique; Le Traon, Pierre-yves. |
| This report discusses whether, by the year 1995, altimeter mean surfaces such as those generated by Geosat, ERS-1 [35 days] and Topex-Poseidon will be accurate enough for extracting the variable ocean signal. The mean oceanic signal is estimated from altimetry using an inverse method. Because of the large number of altimeter measurements, the original one-step method is transformed to a two-step method, the iterative inverse method. The space-time distribution of the altimeter data is only needed to calculate the formal error on the altimeter mean surface. Using a year of satellite altimeter measurements, the mean rms errors are 10 cm for Geosat, 8 cm for ERS- 1 and 13 cm for Topex-Poseidon. The along-track minima are respectively 8, 7 and |
| Tipo: Text |
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| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/00078/18968/17953.pdf |
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| Registros recuperados: 26.605 | |
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