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How does shape affect predator- prey interactions in fish? Implications for marine food web structure and dynamics ArchiMer
Cachera, Marie; Villanueva, Ching-maria; Ernande, Bruno; Baheux, Mickael; Rouquette, Manuel; Chambord, Sophie; Lefebvre, Sebastien.
Each species pertains to a given functional niche, depending on its relationships with others species and its interactions with the abiotic environment. Understanding inter-specific interactions is critical to know and predict ecosystems' structure, functioning and dynamics, but also their response to anthropogenic impacts. Predator-prey relationship is one of the main biotic interactions as it both determines the survival of the prey and the predator and is the keystone of food webs. Unraveling the determinants of predator-prey relationships or, in other terms, the reason why a given predator catches a given prey is therefore of primary importance. Fishes are characterized by a remarkable diversity of shapes which can be associated by their feeding and...
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Ano: 2011 URL: http://archimer.ifremer.fr/doc/00161/27215/25414.pdf
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La forme du poisson: Permet-elle de déduire les guildes trophiques ArchiMer
Chambord, Sophie; Villanueva, Ching-maria; Ernande, Bruno; Lefebvre, Sebastien.
Les réseaux trophiques engendrent tous les transferts d’énergies et de matières au sein d’un écosystème, ce qui expliquent l’intérêt de leur compréhension. Ces réseaux dépendent essentiellement des relations proies-prédateurs, il est donc important de connaître les processus les déterminants. La morphométrie peut être un processus déterminants les relations proies-prédateurs. Ces travaux ont permis d’identifier les relations entre les caractéristiques morphologiques des individus et leur régime alimentaire chez deux espèces relativement contrastée en termes de guilde trophique, à savoir Pleuronectes platessa (plie, Linné 1758) et Dicentrarchus labrax (bar commun, Linné 1758).
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Ano: 2011 URL: http://archimer.ifremer.fr/doc/00143/25417/23568.pdf
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Can fish morphology determine its diet? ArchiMer
Chambord, Sophie; Villanueva, Ching-maria; Ernande, Bruno; Lefebvre, Sébastien.
Biodiversity is a concept that covers a lot of issues that can elucidate diversity-related functional roles to understand ecological ecosystem functioning. Biodiversity can shape ecosystem structure and functioning especially if we focus on predator-prey interactions. Moreover, the mechanisms governing prey-predator relationships will shape the emergent food web structure just as individuals’ characteristics determine the emergent demographic structure of a population. We determined the trophic ecology of fish species in the eastern English Channel by combining gut-content and geomorphometric analyses. We inferred the mechanisms of resource utilisation by Atlantic seabass and plaice by coupling measured geomorphometric determinants of prey-predator...
Tipo: Text Palavras-chave: Biodiversity; Predator-prey interaction; Eastern English Channel Stomach content analysis Geomorphometry Fish.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00143/25416/23567.pdf
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