Anadromous fish use rivers to reproduce before migrating to the sea, where they grow. Sea lamprey (Petromyzon marinus, L.) and allis shad (Alosa alosa, L.) are the most socioeconomic relevant anadromous species, commercially exploited by riverside communities for centuries. Other species like twaite shad (Alosa fallax, Lacepède 1803), Atlantic salmon (Salmo salar, L.) and trout (Salmo trutta, L.) have low commercial value, both due to their reduced population size and limited distribution. Even so, they have high conservationist importance, and they are protected by national and international regulation.

This project aims to implement a monitoring and management program directed to anadromous fisheries by establishing their population above Maximum Sustainable Yield (MSY) levels.