La distribution spatiale, la distribution des taille et l'analyse de forme des otolithes, des outils pour étudier les effets d'une crue cévenole sur les populations de gardon (Rutilus rutilus)
| Autor: | Georges Carrel, Nathalie Reynaud, Pierre Gibert, Fabien Morat, Virginie Raymond, Baptiste Testi, Pierre Favriou, Anthony Maire |
|---|---|
| Přispěvatelé: | Risques, Ecosystèmes, Vulnérabilité, Environnement, Résilience (RECOVER), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Aix Marseille Université (AMU), Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Floodplain CRUE CEVENOLE Population Fluvial Aquatic Science Spatial distribution 010603 evolutionary biology 01 natural sciences GARDON MORPHOMETRIE Flash flood medicine 14. Life underwater RHONE COURS D'EAU education OTOLITHES Ecology Evolution Behavior and Systematics Otolith geography education.field_of_study geography.geographical_feature_category Ecology Flood myth biology 010604 marine biology & hydrobiology biology.organism_classification medicine.anatomical_structure RHONE [SDE]Environmental Sciences Environmental science Rutilus CYPRINIDAE |
| Zdroj: | Ecology of Freshwater Fish Ecology of Freshwater Fish, Consejo Superior de Investigaciones Científicas, 2018, 27 (1), pp.421-432. ⟨10.1111/eff.12357⟩ Ecology of Freshwater Fish, 2018, 27 (1), pp.421-432. ⟨10.1111/eff.12357⟩ |
| ISSN: | 0906-6691 1600-0633 |
| DOI: | 10.1111/eff.12357⟩ |
| Popis: | [Departement_IRSTEA]Eaux [TR1_IRSTEA]QUASARE [ADD1_IRSTEA]Systèmes aquatiques soumis à des pressions multiples; International audience; Floods are known to be the major source of natural variability and disturbance in stream ecosystems. However, the management and channelisation of large rivers have impacted the fluvial geomorphology and disconnected the main channel and floodplains used as nurseries by many species of fish. This study examines the influence of a first autumnal flood event of the Ardèche River on the roach population, Rutilus rutilus (Linnaeus, 1758), in the Caderousse reach on the Rhône River. This influence was evaluated through an analysis of the spatial distribution for the abundance and size of juvenile roach and an analysis of otolith shape. Juvenile roach from the three sections of the reach formed well-defined local populations before and after the flood event. Juvenile roach were always more abundant in the less modified section (BPS) of the river than in the other sections (RES and TAIL). While the original primary river channel was directly impacted by the flash flood, no significant difference in otolith shape was observed before or after the flash flood. Our results suggest that this part of the reach provides refuge habitats used by fish during high flow events. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text