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Temporal genetic variation in European eel Anguilla anguilla (Linnaeus, 1748): A fine scale investigation in the Adour estuary

Abstract The genetic structure of arrival cohorts of European eels in the continental basin of Adour, France, was analysed. A regular sampling was carried out during three successive seasons of migration to ensure a representative sampling of complete recruitment in the estuary. Genetic variability within this sample was evaluated by analysis of highly polymorphic microsatellite markers. A high level of polymorphism was highlighted but a lack of genetic differentiation was observed between cohorts collected during the three successive seasonal migrations.