Habitat use at multiple scales as indicator of fish sensitivity to the artificialisation of large rivers - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement
Communication Dans Un Congrès Année : 2018

Habitat use at multiple scales as indicator of fish sensitivity to the artificialisation of large rivers

Utilisation de l'habitat à plusieurs échelles comme indicateur de la sensibilité des poissons à l'artificialisation des grands cours d'eau

Hervé Capra
Hervé Pella
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Laura Plichard
Michaël Ovidio

Résumé

Habitat selection and seasonal mobility are major components of the biology of fish populations. The aim of this study is to characterise fish habitat use templates at two different spatial scales (over reaches of 2 vs. 35 km) for two native rheophilic cyprinids (Barbus barbus and Squalius cephalus) and for the non-native catfish (Silurus glanis). The study was carried out in the Upper Rhône River characterised by strong and rapid variations of flow and thermal regimes (caused by hydroelectric and nuclear power plants). Results reveal contrasted mobility patterns, habitat uses and home-range sizes between native and non-native fish species, but also a high inter-individual variability. At a local scale, fish modify their habitat selection when discharge changes in selecting "least constraining" conditions. At a larger scale they are able to travel rapidly between their favoured habitats.
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Dates et versions

hal-02608150 , version 1 (05-09-2023)

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Hervé Capra, Hervé Pella, Laura Plichard, Nicolas Lamouroux, Michaël Ovidio. Habitat use at multiple scales as indicator of fish sensitivity to the artificialisation of large rivers. ISE2018 - Ecohydraulics, Aug 2018, Tokyo, Japan. pp.4. ⟨hal-02608150⟩
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