Rayons de la nageoire caudale d'un barbeau fluviatile

Rays of the caudal fin of a barbel, Barbus barbus. This image shows the structure of the fin, notably its segmentation. Laboratory experiments on the barbel help improve understanding of the characteristics of its life cycle, notably the crucial stages of its development. In particular, research scientists can study its growth thanks to otoliths. They can then target actions to promote the ecological restoration of this species. Indeed, the barbel is a species characteristic of several areas of the Rhône whose life cycle is affected by the numerous hydroelectric developments there.