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Primary production and depth drive different trophic structure and functioning of fish assemblages in French marine ecosystems ArchiMer
Cresson, Pierre; Chouvelon, Tiphaine; Bustamante, Paco; Bănaru, Daniela; Baudrier, Jerome; Le Loch, Francois; Mauffret, Aourell; Mialet, Benoit; Spitz, Jérome; Wessel, Nathalie; Briand, Marine; Denamiel, Margaux; Doray, Mathieu; Guillou, Gaël; Jadaud, Angelique; Lazard, Coline; Noûs, Camille; Prieur, Solène; Rouquette, Manuel; Saraux, Claire; Serre, Sandrine; Timmerman, Charles-andre; Verin, Yves; Harmelin-vivien, Mireille.
Investigating the drivers of fish assemblage trophic structure is a critical question, in order to better understand ecosystem functioning, predict the effects of perturbations and implement integrated management of exploited marine ecosystems. Ecosystemic surveys enabled the determination of the trophic structure of the fish assemblages in three French marine ecosystems, namely the Eastern English Channel, the Bay of Biscay and the Gulf of Lions, through the simultaneous collection of qualitative (stable isotopes and energy content) and quantitative (biomass) data. In the Bay of Biscay and in the Gulf of Lions, pelagic primary production supported at least 80% of the fish biomass production, and explained the dominance of pelagic species, but with...
Tipo: Text Palavras-chave: Fish community; Trophodynamics; Food webs; Benthic-pelagic coupling.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00629/74120/73562.pdf
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Alimentation du maquereau en Manche ArchiMer
Cresson, Pierre; Timmerman, Charles-andre; Cordier, Remy; Couvreur, Clemence; Denamiel, Margaux; Engler, Alexandra; Lebon, Fabien; Lepretre, Marie-anais; Marchal, Paul.
This document summaries major information about the diet of mackerel Scomber scombrus in the English Channel, collected during the VARITROPH project. Mackerel consume quite exclusively copepods, with low effect of size on both diet and trophic level.
Tipo: Text
Ano: 2021 URL: https://archimer.ifremer.fr/doc/00675/78716/80902.pdf
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Alimentation de la sole et de la plie en Manche ArchiMer
Cresson, Pierre; Timmerman, Charles-andre; Couvreur, Clemence; Denamiel, Margaux; Lepretre, Marie-anais; Marchal, Paul.
This document summaries major results about the diet of sole Solea solea and plaice Pleuronectes platessa in the English Channel, collected in the framework of the VARITROPH project. Both species have a similar diet, based on crustaceans, but plaice exhibit a larger diversity of secundary species (bivalves, annelids and echinoderms) than sole (annelids only). Diversity of the preys for plaice is explained by differences between size classes. Diet of small individuals is less diverse than the diet of large individuals. Trophic similarity between sole and plaice is also exhibited when comparing ontogenic changes of trophic levels, that are pretty similar for both species, and consistent with a diet based on small invertebrates.
Tipo: Text
Ano: 2021 URL: https://archimer.ifremer.fr/doc/00675/78718/80904.pdf
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Alimentation du merlan en Manche ArchiMer
Cresson, Pierre; Timmerman, Charles-andre; Denamiel, Margaux; Millet, Lucie; Marchal, Paul.
This document summaries the major findings about the diet of whiting Merlangius merlangus in the English Channel, in the framework of the VARITROPH project. Whiting diet is based on several main preys, with an ontogenic variation. Individuals lower than 30 cm mostly fed on crustaceans, while diet of larger individuals is based on cephalopods and fishes. As a result, trophic level show 2 phases, one increasing at the early life stages, and a constant trophic level for individuals larger than 30 cm.
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Ano: 2021 URL: https://archimer.ifremer.fr/doc/00675/78717/80903.pdf
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Seasonal and ontogenetic variation of whiting diet in the Eastern English Channel and the Southern North Sea ArchiMer
Timmerman, Charles-andre; Marchal, Paul; Denamiel, Margaux; Couvreur, Clemence; Cresson, Pierre.
An accurate description of trophic interactions is crucial to understand ecosystem functioning and sustainably manage marine ecosystems exploitation. Carbon and nitrogen stable isotopes were coupled with stomach content analyses to investigate whiting (Merlangius merlangus, Linnaeus, 1758) feeding behavior in the Eastern English Channel and Southern North Sea. Whiting juveniles and adults were sampled in autumn and winter to investigate both ontogenetic and seasonal changes. In addition, queen scallops (Aequipecten opercularis) samples were collected along with fish to be used as isotopic benthic baseline. Results indicated an ontogenetic diet change from crustaceans to fish and cephalopods. In autumn, δ15N values generally increased with fish size while...
Tipo: Text
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00651/76359/77350.pdf
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