Archive Institutionnelle de l'Ifremer

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Cuif Jean-Pierre, Burghammer Manfred, Chamard Virginie, Dauphin Yannicke, Godard Pierre, Le Moullac Gilles, Nehrke Gernot, Perez-Huerta Alberto
Consistently classified among the references for calcite simple prisms, the microstructural units that form the outer layer of the Pinctada margaritifera have been investigated through a series of morphological, crystallographical and biochemical characterizations. It is often said that the polygonal transverse shape of the prisms result from the competition for space between adjacent crystals. In contrast to this classical scheme the Pinctada prisms appear to be composed of four successive [...]
2014-12.   Minerals
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 [...]
2014-11.   Plos One
Gimenez Olivier, Buckland Stephen T., Morgan Byron J. T., Bez Nicolas, Bertrand Sophie, Choquet Rémi, Dray Stephane, Etienne Marie-Pierre, Fewster Rachel, Gosselin Frédéric, Merigot Bastien, Monestiez Pascal, Morales Juan M., Mortier Frédéric, Munoz François, Ovaskainen Otso, Pavoine Sandrine, Pradel Roger, Schurr Frank M., Thomas Len, Thuiller Wilfried, Trenkel Verena, De Valpine Perry, Rexstad Eric
The desire to predict the consequences of global environmental change has been the driver towards more realistic models embracing the variability and uncertainties inherent in ecology. Statistical ecology has gelled over the past decade as a discipline that moves away from describing patterns towards modelling the ecological processes that generate these patterns. Following the fourth International Statistical Ecology Conference (1–4 July 2014) in Montpellier, France, we analyse current trends [...]
2014-12-24.   Biology Letters
Wang He, Zhu Jianhua, Yang Jingsong
Nowadays, spaceborne Synthetic Aperture Radar (SAR) has become a powerful tool for providing significant wave height (SWH). Traditionally, validation of SAR derived SWH has been carried out against buoy measurements or model outputs, which only yield an inter-comparison, but not an "absolute" validation. In this study, the triple collocation error model has been introduced in the validation of Envisat ASAR derived SWH products. SWH retrievals from ASAR wave mode using ESA's algorithm are [...]
2014-12.   Remote Sensing
Nicolle Jean Pierre, Knockaert Camille
1983-07.   Rapport
Hauser D., Caudal G., Guimbard Sebastien, Mouche Alexis
Radar observations of the sea surface at C-Band and small incidence angles are used to investigate some properties of the surface slope probability density function (pdf). The method is based on the analysis of the variation of the radar cross-section with incidence angle, assuming a backscattering process following the Geometrical Optics theory. First, we assess the limit of this model in our experimental configuration by using simulations of radar cross-sections with a more accurate [...]
2008-02.   Journal Of Geophysical Research Oceans
Ce document, onzième édition d’une série lancée en 2000, est une restitution globale des données collectées sur les flottilles françaises en 2013 sur l’année de référence 2012, dans le cadre du Système d’Informations Halieutiques (SIH) de l’Ifremer, et en particulier au travers de son réseau d’observateurs. Cette synthèse 2012 réactualise la Synthèse des flottilles de pêche 2011, éditée par l’Ifremer en 2013. Cette restitution a pour ambition de présenter, de manière synthétique, l’activité de [...]
2014-12.   Rapport scientifique
Ce rapport a comme objectif principal de préciser les connaissances sur les relations existantes entre les apports terrigènes quantitatifs et qualitatifs des fleuves (Lay, Sèvre niortaise, Charente, Seudre, Loire, Gironde) et la conchyliculture (ostréiculture et mytiliculture) dans les Pertuis Charentais. Si la quantité d’eau douce, représentée par la variable salinité, semble avoir un impact faible sur la conchyliculture, sa qualité, déterminée par les substances particulaires et dissoutes [...]
2015-01.   Rapport de contrat
To implement an ecosystem approach to fisheries management, there is a need to characterize the total pressure exerted by fisheries at the community level. French onboard observer data were used to derive catch metrics and compare fishing distribution across community components between two sites in the Southern Bay of Biscay. Sample-based rarefaction curves were used to standardize metrics across different active and passive gears, and correct for sample size differences. Six metrics for [...]
2015-04.   Fisheries Research
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