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Gilliers, Camille / Amara, Rachid / Bergeron, Jean-pierre / Le Pape, Olivier / Desaunay, Yves - 2016Coastal and estuarine ecosystems provide nursery habitat for various marine species. Habitat quality has potential effects on growth and survival of fish juveniles. As quality can not be measured directly, we have used two kind of condition indices to assess growth and nutritional status of 0-group...Contributeur (s):
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Bergeron, Jean-pierre / Koueta, Noussithe / Masse, Jacques - 2013The French part of the continental shelf of the Bay of Biscay (northeast Atlantic) is the habitat of an anchovy (Engraulis encrasicolus L.) population of scientific interest because of its economic importance and the trend towards greater interannual fluctuations in its abundance, particularly as a...Contributeur (s):
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Bergeron, Jean-pierre / Masse, Jacques - 2012The recruitment of marine fish populations is a central concern of fisheries scientists. Multiple research pathways have been explored, with emphasis of the causes of mortality affecting principally the early developmental stages of fish life. The small data set presented focuses on a feature often...Contributeur (s):
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Bergeron, Jean-pierre / Koueta, Noussithe - 2011During spring of 2005, satellite imagery revealed high sea surface chlorophyll a concentrations over the edge of a wide continental shelf in the Bay of Biscay (NE Atlantic). As a descriptor of biological productivity, mesozooplankton aspartate transcarbamylase specific activity was measured in situ...Contributeur (s):
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Bergeron, Jean-pierre / Masse, Jacques - 2011Fishermen have long observed the sudden change of shoaling behaviour of small pelagic fish following a strong wind event. The phenomenon was thereafter confirmed by fisheries scientists using acoustic tools. In this study, we report our observations made with acoustics to measure disorganization of...Contributeur (s):
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Bergeron, Jean-pierre / Delmas, Daniel / Koueta, Noussithe - 2010In the 2000 and 2001 springtime periods, mesozooplankton samples were systematically taken during research cruises devoted to the study of the distribution and abundance of small pelagic fishes in the French part of the Bay of Biscay, NE Atlantic, continental shelf. Simultaneous activities of three...Contributeur (s):
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Bergeron, Jean-pierre - 2009The study examines the spatial variations over the French continental shelf of the southern Bay of Biscay (North-East Atlantic) in the nutritional condition of anchovy (Engraulis encrasicolus L.) larvae which was estimated through their DNA/C index. The same cruise yielded quantitative estimates of...Contributeur (s):
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Bergeron, Jean-pierre / Delmas, Daniel / Koueta, Noussithe - 2009A fisheries research cruise conducted in 2000 offered a first opportunity to take simultaneous measurements of the activities of three enzymes in mesozooplankton samples collected at a regional scale over the continental shelf of the Bay of Biscay in the NE Atlantic, with the aim of characterizing...Contributeur (s):
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Gilliers, Camille / Le Pape, Olivier / Desaunay, Yves / Bergeron, Jean-pierre / Schreiber, Nathalie / Guerault, Daniel / Amara, Rachid - 2006Indicators of growth and condition were used to compare the habitat quality of nurseries of juvenile sole (Solea solea L.) in the Bay of Biscay, based on one survey in 2000. The four biological indicators are poorly correlated with each other, suggesting that no single measure may give an adequate...Contributeur (s):
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Petitgas, Pierre / Masse, Jacques / Bourriau, Paul / Beillois, Pierre / Bergeron, Jean-pierre / Delmas, Daniel / Herbland, Alain / Koueta, Noussithe / Froidefond, Jean-marie / Santos, Maria - 2006The spatial pattern in hydro-plankton and fish distributions and their relationship were analysed based on the spring 2000 fisheries acoustic survey. The importance of this survey was that it was a multi-disciplinary platform which collected an extensive set of parameters in the hydro-plankton...Contributeur (s):
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Bergeron, Jean-pierre - 2006Pyruvate kinase (PK) activity measurements are used to assess the role of carbohydrates in global feeding of mesozooplankton communities inhabiting an estuary plume. As a consequence of a remarkably low freshwater discharge rate, the sea surface layers of the area under estuarine influence showed a...Contributeur (s):
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Bergeron, Jean-pierre - 2004A major spawning ground of the European anchovy (Engraulis encrasicolus) population in the Bay of Biscay is located near the mouth of the Gironde estuary. Variations in the river discharge affect the supply of nutrients to the coastal marine area encompassing anchovy spawning grounds. Two "...Contributeur (s):
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Gilliers, Camille / Amara, Rachid / Bergeron, Jean-pierre / Le Pape, Olivier / Desaunay, Yves - 2002Coastal and estuarine ecosystems provide nursery habitat for various marine species. Habitat quality has potential effects on growth and survival of fish juveniles. As quality can not be measured directly, we have used two kind of condition indices to assess growth and nutritional status of 0-group...Contributeur (s):
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Bergeron, Jean-pierre / Herbland, Alain - 2001Estimates of carbohydrate assimilation within the mesozooplankton compartment are a fundamental concern in oceanography because they give a general expression of the biologically-regulated incorporation of metabolic fuel produced from inorganic nutrients by phytoplankton in the sea. A new tool is...Contributeur (s):
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Bergeron, Jean-pierre - 2000A new biochemical index was used to assess larval fish nutritional condition during a. survey cruise in the Bay of Biscay in early June 1993. This period corresponds to the breeding season of the European anchovy (Engraulis encrasicolus L.). The analysis of samples taken at grid points indicated a...Contributeur (s):