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Écologie trophique des poissons top-prédateurs - interactions entre espèces natives et introduites au sein d'écosystèmes dulçaquicoles

Abstract : The impacts of exotic species on ecosystem functions are still poorly known. Top-predatory fish, which are at the top of the food-chain are relevant models to study the impacts on freshwater ecosystems. Introductions of exotic top-predator fish can induce changes in the functioning of freshwater communities, that could be inferred by stable isotope analyses in lentic and lotic food-webs, using trophic positions and diet compositions of top-predators. Moreover, the otolith chemical signatures can discriminate freshwater fish stocks and help to reconstruction of the introduced fish life history. Our results provide new information about trophic ecology of top-predator fish, and this knowledge will be useful to design regional conservation plans.
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Submitted on : Monday, December 10, 2012 - 2:58:54 PM
Last modification on : Friday, January 8, 2021 - 10:16:03 AM
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Aurelia Martino. Écologie trophique des poissons top-prédateurs - interactions entre espèces natives et introduites au sein d'écosystèmes dulçaquicoles. Ecologie, Environnement. Université Paul Sabatier - Toulouse III, 2012. Français. ⟨tel-00763302⟩

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