This operation called Migratory Edgeboards 2018 led by the association LOGRAMI aims to centralise and bank data on migratory fish in the Loire basin. This knowledge transfer should enable managers of the Loire basin’s aquatic environments to guide their actions to promote the life cycle and return of migratory fish to the Loire basin. This operation is submitted under Action 12 of the ERDF Loire Basin POI in the context of the 2018 call for projects on research, experimentation, acquisition and enhancement of knowledge on amphihalin migratory fish populations in the Loire basin. This operation helps to restore the functionality of the ecosystems in the region.