Projet scientifique - Influence du démantèlement des barrages sur les traits d'histoire de vie des espèces amphihalines thalassotoques: cas de l'anguille et du flet de la Sélune

This project examines the life history traits of eels and flounders—two migratory species that live in rivers and spawn in the sea—prior to the restoration of the Sélune River’s connectivity, in order to anticipate the subsequent effects of this restoration. Data: - Catches of eels and flounder (recorded at least within the framework of the Observatory, for eels) - Fat content (measured using a fat meter and chloroform extraction); - Energy content (calorimetric bomb test on muscle tissue) - Position and trophic niche - Age and growth rate - Migration and basin use profile - Prevalence and abundance of parasitic metazoans (overall and for each parasite species), diversity of parasite communities - Diversity and status of the intestinal microbiome determined Sites: 6 sites in total: Sélune (Pêcherie + Roche qui Boit), Oir, Beuvron, Sée, Couesnon, Marais de Dol - Eels: 5 sites (Sélune Pêcherie + Roche qui Boit, Oir, Beuvron, Sée) - Flounders: 4 sites (Sélune, Sée, Couesnon, and Marais de Dol)