Individual movements, home ranges and habitat use by native rheophilic cyprinids and non-­native catfish in a large regulated river - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Fisheries Management and Ecology Année : 2018

Individual movements, home ranges and habitat use by native rheophilic cyprinids and non-­native catfish in a large regulated river

Déplacements individuels, home range et utilisation de l'habitat de cyprinidés rhéophiles (endémiques) et du silure (exotique) dans un fleuve régulé

Hervé Capra
M. Ovidio
  • Fonction : Auteur

Résumé

The mobility patterns of two native species, the barbel, Barbus barbus (L.) and the chub Squalius cephalus (L.) and of one non-native fish species, the catfish Silurus glanis (L.) were assessed on a 35.5-km reach of the Upper Rhône River, a strong flowing river with notable thermal regime alterations. An active acoustic tracking technique adapted to large rivers allowed (1) the identification of longitudinal home ranges, movements and preferred habitat at large scale; and (2) the analysis of the influence of discharge and water temperature on the movement patterns of the fish. The active fish-tracking system recorded 1572 fish localisations over seven months on a weekly basis for 80% of the tagged fish (37 barbel, 23 chub and 13 catfish). Compared with the catfish, barbel and chub showed wider longitudinal home ranges, more movements > 1 km and higher inter-individual variability. The catfish preferred artificially heated habitats with less morphological diversity. The three species were more often localised in river sections with high density of woody debris. The results suggest that habitat degradation is more damaging for cyprinids, while the catfish seemed less, if not unimpacted, in large modified rivers.
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Dates et versions

hal-02024347 , version 1 (19-02-2019)

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Hervé Capra, H. Pella, M. Ovidio. Individual movements, home ranges and habitat use by native rheophilic cyprinids and non-­native catfish in a large regulated river. Fisheries Management and Ecology, 2018, 25 (2), pp.136-149. ⟨10.1111/fme.12272⟩. ⟨hal-02024347⟩
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