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Registros recuperados: 9
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A dynamic and mechanistic model of PCB bioaccumulation in the European hake (Merluccius merluccius) ArchiMer
Bodiguel, Xavier; Maury, Olivier; Mellon-duval, Capucine; Roupsard, Francois; Le Guellec, Anne-marie; Loizeau, Veronique.
Bioaccumulation is difficult to document because responses differ among chemical compounds, with environmental conditions, and physiological processes characteristic of each species. We use a mechanistic model, based on the Dynamic Energy Budget (DEB) theory, to take into account this complexity and study factors impacting accumulation of organic pollutants in fish through ontogeny. The bioaccumulation model proposed is a comprehensive approach that relates evolution of hake PCB contamination to physiological information about the fish, such as diet, metabolism, reserve and reproduction status. The species studied is the European hake (Merluccius merluccius, L. 1758). The model is applied to study the total concentration and the lipid normalised...
Tipo: Text Palavras-chave: Dynamic Energy Budget (DEB) Bioaccumulation model; Bioenergetic Polychlorinated biphenyls (PCB) Demersal fish Merluccius merluccius.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6789.pdf
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Are hake otolith macrostructures randomly deposited? Insights from an unsupervised statistical and quantitative approach applied to Mediterranean hake otoliths ArchiMer
Courbin, Nicolas; Fablet, Ronan; Mellon-duval, Capucine; De Pontual, Helene.
Individual fish age data are crucial to fish stock assessment, so their accuracy and precision are vital. The acquisition of age data most often relies on interpreting fish otoliths, a complex task in which expert subjectivity increases with the complexity of the structural patterns of the otoliths. The question arises for certain fish species (e.g. hake, Merluccius merluccius) whether the deposition of otolith macrostructures is meaningful for age estimation. A quantitative method based on the evaluation of otolith similarity in terms of structural patterns is presented to investigate this issue. It relies on the determination of a typology of otolith macrostructures from an unsupervised statistical analysis of the distributions of their characteristics....
Tipo: Text Palavras-chave: Quality control; Otolith; Merluccius merluccius; Growth; Age estimation method; Age.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-2678.pdf
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Comparison of C and N stable isotope ratios between surface particulate organic matter and microphytoplankton in the Gulf of Lions (NW Mediterranean) ArchiMer
Harmelin Vivien, M; Loizeau, Veronique; Mellon-duval, Capucine; Beker, B; Arlhac, D; Bodiguel, Xavier; Ferraton, Franck; Hermand, R; Philippon, Xavier; Salen Picard, C.
Carbon and nitrogen stable isotope ratios of particulate organic matter (POM) in surface water and 63-200 mu m-sized microphytoplankton collected at the fluorescence maximum were studied in four sites in the Gulf of Lions (NW Mediterranean), a marine area influenced by the Rhone River inputs, in May and November 2004. Some environmental (temperature, salinity) and biological (POM, Chlorophyll a and phaeopigments contents, phytoplankton biomass and composition) parameters were also analysed. Significantly different C and N isotopic signatures between surface water POM and microphytoplankton were recorded in all sites and seasons. Surface water POM presented systematically lower delta C-13 (similar to 4.2 parts per thousand) and higher delta N-15 (similar to...
Tipo: Text Palavras-chave: Seasonal variation; PON/Chl a; C/N ratio; Stable isotopes; Fluorescence maximum; Phytoplankton composition; Particulate organic matter.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-5919.pdf
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Difference of mercury bioaccumulation in red mullets from the north-western Mediterranean and Black seas ArchiMer
Harmelin-vivien, M.; Cossa, Daniel; Crochet, Sylvette; Banaru, D.; Letourneur, Y.; Mellon-duval, Capucine.
The relationships between total mercury (Hg) concentration and stable nitrogen isotope ratio (delta N-15) were evaluated in Mullus barbatus barbatus and M. surmuletus from the Mediterranean Sea and M. barbatus ponticus from the Black Sea. Mercury concentration in fish muscle was six times higher in the two Mediterranean species than in the Black Sea one for similar sized animals. A positive correlation between Hg concentration and delta N-15 occurred in all species. Increase in Hg concentration with delta N-15 was high and similar in the two Mediterranean fishes and much lower in the Black Sea species. Since this was neither related to trophic level difference between species nor to methylmercury (MeHg) concentration differences between the north-western...
Tipo: Text Palavras-chave: Black Sea; Mediterranean; Mullidae; Methylmercury; Trophic level; N 15.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6647.pdf
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Growth of European hake (Merluccius merluccius) in the Gulf of Lions based on conventional tagging ArchiMer
Mellon-duval, Capucine; De Pontual, Helene; Metral, Luisa; Quemener, Loic.
Growth of European hake was estimated from the results of a conventional tagging study in the Gulf of Lions, the first tagging experiment to have been undertaken on the species in Mediterranean waters. In all, 4277 hake 15–40 cm long were tagged and released on the inshore fishing grounds during spring 2006. The overall recapture rate was 6.5% and times-at-liberty ranged from 1 to 717 d. Growth rate in hake varied with size and sex. The estimated growth parameter (von Bertalanffy k) was estimated as double previously published values based on size frequency distribution in the area. Compared with recent growth parameters derived from the tagging experiments in the Bay of Biscay, k was estimated to be slightly lower in the Gulf of Lions. With this faster...
Tipo: Text Palavras-chave: Age estimation; European hake; Growth; Mediterranean; Tagging.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00000/11134/11532.pdf
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Impact halieutique des récifs artificiels du Languedoc Roussillon ArchiMer
Mellon-duval, Capucine.
Les aménagements en récifs artificiels du Languedoc Roussillon ont été réalisés à la fin de l'année 1985. Le programme de recherche qui avait été mis en place dès 1984 se conclura fin 1988. Aux cours des trois années écoulées, ce programme a consisté à mettre au point une méthodologie d'approche de l'impact des récifs artificiels. L'équipe constituée de sept personnes dont quatre enquêteurs, a permis de réunir une quantité appréciable de données concernant les périodes pré et post-immersions. Un premier document établi en 1985 décrit les sites d'aménagement, détaille la méthodologie du suivi et établit un bilan biologique succinct basé sur un an et demi de données obtenues avant les immersions des structures (DUVAL et DUCLERC, 1985). Le présent document...
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Ano: 1987 URL: http://archimer.ifremer.fr/doc/00003/11417/7960.pdf
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Influence of sex, maturity and reproduction on PCB and p,p ' DDE concentrations and repartitions in the European hake (Merluccius merluccius, L.) from the Gulf of Lions (NW Mediterranean) ArchiMer
Bodiguel, Xavier; Loizeau, Veronique; Le Guellec, Anne-marie; Roupsard, Francois; Philippon, Xavier; Mellon-duval, Capucine.
The main objective of this work was to establish the influence of sex, maturity and reproduction on the contamination of the demersal fish Merluccius merluccius by organochlorine compounds. Polychlorinated biphenyls (PCBs) and p,p'DDE were quantified in muscle, liver and gonads of female and male hakes collected in the Gulf of Lions in 2004 and 2005. Observed levels appeared higher than the population of the Bay of Biscay and lower than the population of the Thyrrenian Sea. Contaminant fingerprints were roughly constant whatever the studied organ and the hake biological condition. Concentrations varied significantly according to the sex and maturity of hakes. Mature specimens were more contaminated than immature, and males presented higher levels than...
Tipo: Text Palavras-chave: Bioaccumulation PCBs p; P ' DDE Merluccius merluccius Demersal fish Mediterranean Sea.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00000/11129/9317.pdf
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Récifs artificiels : analyse bibliographique ArchiMer
Lefevre, Jean-robert; Mellon-duval, Capucine; Ragazzi, Monique; Duclerc, Jean.
Ce travail consiste en une analyse et un classement des textes traitant des récifs artificiels et porte sur 792 publications. Les documents consultés présentent des niveaux d'intérêt très divers, seulement un petit nombre de ces documents peut être considéré comme fondamental ; en revanche, la majorité d'entre eux n'aborde ce sujet que de façon superficielle et se limite souvent à la répétition d'ouvrages antérieurs. Toute indication quant à la valeur relative de chaque article a été volontairement évitée, de manière à laisser aux lecteurs l'entière liberté d'appréciation selon le domaine dans lequel ils se sentent concernés. Le souci de centrer ce travail sur les aménagements récifaux artificiels proprement dits a conduit à éliminer les documents ne se...
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Ano: 1984 URL: http://archimer.ifremer.fr/doc/00003/11418/7961.pdf
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Spatio-temporal variation in diet may affect condition and abundance of juvenile European hake in the Gulf of Lions (NW Mediterranean) ArchiMer
Ferraton, Franck; Harmelin Vivien, Mireille; Mellon-duval, Capucine; Souplet, Arnauld.
Variations in space and time of juvenile hake diet (5 to 19 cm total length, TL) were investigated in the Gulf of Lions (NW Mediterranean) and related to variation in C and N stable isotope ratios, condition and abundance. Crustaceans (mysids and euphausiids) dominated the diet of the smallest juvenile hake (5 to 9 cm. TL), and fishes (sardines and anchovies) of the largest juveniles (15 to 19 cm TL). The transition from a crustacean- to a fish-based diet occurred in medium-sized juveniles (10 to 14 cm TL), which preyed on both crustaceans and fishes (gobiids). These juveniles preyed on fishes when living in shallow waters (30 to 50 m), and crustaceans when located in deep waters (70 to 150 m). Although hake diet did not change over time in shallow waters...
Tipo: Text Palavras-chave: Recruitment; Relative condition factor; Nitrogen; Carbon; Stable isotopes; Stomach contents; Merluccius merluccius.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-2627.pdf
Registros recuperados: 9
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