The marble trout Salmo marmoratus (Cuvier 1829) is an endemic Salmonidae of the freshwater environments connected to the Adriatic basin. This fish lives in fresh and well oxygenated water, typical of the south alpine side, preferring the piedmonts parts but moving even to the mountain tumultuous parts. It is in the Red List of [...]

It is enough a gap of few meters to stop the flow of the fish in a river. Many human interventions have fragmented the watercourses with hydropower barriers and weirs in order to slow down the down flow of the water. The construction of bridges, like the Migiandone (Ornavasso) one, can create interruptions too, damaging [...]