Phenology and biological traits of migrating salmon (Salmo salar) sampled by trapping in the survey in the Oir river (France)

Since 1984, monitoring has been carried out to observe migration phenology and quantify the abundance of migratory salmon in the Oir basin. In the downstream part of the Oir River, a trapping system controls salmon migration by means of 2 traps, one for the descending fish and the other for the ascending fish. On this occasion, biometric characteristics are developed to characterize the population in order to feed this data set.