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Caractérisation et modélisation des processus de bioaccumulation des PCB chez le merlu (Merluccius merluccius) du golfe du Lion ArchiMer
Bodiguel, Xavier.
Understanding bioaccumulation mechanisms of persistent organic pollutants (POPs) is a major issue for environmental risk assessment. In this work, polychlorinated biphenyls (PCBs), a model contaminant family, has been studied in the European hake (Merluccius merluccius), a high trophic level species from the Gulf of Lions. High concentrations of PCBs were measured in hake from this area compared to those encountered in the population of the Bay of Biscay. PCB biomagnification was highlighted along its food web from marine phytoplankton, suggesting a strong influence of diet on contamination levels. The role of other biological processes was also apprehended in order to understand the high variability of observed levels. Thus, growth, sex, and also the...
Tipo: Text Palavras-chave: DEB theory; Bioenergetic model; Gulf of Lions; Biomagnification; Food web; Hake; Bioaccumulation; Polychlorinated biphenyls; Organic contaminants; Théorie DEB; Modèle bioenergétique; Golfe du Lion; Bioamplification; Réseau trophique; Merlu; Bioaccumulation; Polychlorobiphényles; Contaminants organiques.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/these-6490.pdf
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Energy density of freshwater Patagonian organisms Ecología austral
Ciancio,Javier; Pascual,Miguel.
We assessed by using a bomb calorimeter the energy density of the main species of Patagonian freshwater ecosystems, including fish, crustaceans, gastropods, oligochaetes, and insects. Fish (5048-5789 Cal/g) were the most energy density group, followed by insects (5062- 5232), crustaceans (3364-3994), oligochaetes (3471) and gastropods (1143). These data consist on the first direct energy density estimations of freshwater species and are intended as a baseline information for modelling the energy fluxes in Patagonian freshwater ecosystems.
Tipo: Info:eu-repo/semantics/other Palavras-chave: Bomb calorimeter; Bioenergetic model.
Ano: 2006 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2006000100009
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Reconstructing individual food and growth histories from biogenic carbonates ArchiMer
Pecquerie, Laure; Fablet, Ronan; De Pontual, Helene; Bonhommeau, Sylvain; Alunno-bruscia, Marianne; Petitgas, Pierre; Kooijman, Sebastiaan A. L. M..
Environmental conditions experienced by aquatic organisms are archived in biogenic carbonates such as fish otoliths, bivalve shells and coral skeletons. These calcified structures present an accretionary growth and variations in optical properties - color or opacity - that are used to reconstruct time. Full and reliable exploitation of the information extracted from these structures is, however, often limited as the metabolic processes that control their growth and their optical properties are poorly understood. Here, we propose a new modeling framework that couples both the growth of a biogenic carbonate and its optical properties with the metabolism of the organism. The model relies on well-tested properties of Dynamic Energy Budget (DEB) theory. It is...
Tipo: Text Palavras-chave: Otolith; Calcification; Metabolism; Bioenergetic model; Food reconstruction; Dynamic Energy Budget theory.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00060/17082/14593.pdf
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