en fr Transferability of fish habitat models: the new 5m7 approach applied to the mediterranean barbel Barbus Meridionalis Transférabilité des modèles habitat-poisson : la nouvelle approche 5M7 appliquée au Barbeau MéridionaReportar como inadecuado




en fr Transferability of fish habitat models: the new 5m7 approach applied to the mediterranean barbel Barbus Meridionalis Transférabilité des modèles habitat-poisson : la nouvelle approche 5M7 appliquée au Barbeau Méridiona - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

1 UR RECOVER - Risques, Ecosystèmes, Vulnérabilité, Environnement, Résilience

Abstract : The Mediterranean barbel, Barbus meridionalis Risso, 1827, is currently classified as a near threatened species by the IUCN. For the purpose of instream habitat management and in order to determine the environmental flows requirements of this species, we recently developed univariate Category Three preferences curves Bovee et al 1 for use within the Instream Flow Incremental Methodology IFIM. In two Mediterranean rivers of southern France, a total of 883 Mediterranean barbel BAM was collected at 406 electrofishing units, and measurements of local substrate and hydraulic features were performed. The 5M7 model was used to build the river-specific trajectories of the Mediterranean barbel in the depth, mean velocity, total fish length space, hereafter D,V,TL. This model was then improved with the inclusion of a new system of species-environment equations. This revealed that the river-specific trajectories can be predicted by applying preferences curves related to the mean total length of each life stages to the river specific hydrosignatures. Results also indicated that the preferences curves of another barbel BAF species, Barbus barbus Linnaeus, 1758, were compatible with the Mediterranean barbel trajectories. This new approach represents a valuable tool to assess the transferability of preference curves and in a general way to assess the efficiency of fish habitat models.

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Keywords : fish habitats modelling

Mots-clés : POISSON HABITAT MODELISATION BARBUS MERIDIONALIS BARBUS BARBUS





Autor: Y. Le Coarer - O. Prost - B. Testi -

Fuente: https://hal.archives-ouvertes.fr/



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