Beavers have the reputation as the engineers of the animal kingdom by building dams across rivers to create deep, still bodies of water. North American and European freshwater ecologists examined the impact of these activities on valuable fish populations.
The reintroduction of the Eurasian beaver (Castor fiber) represents a major success story for European conservation, but concern exists over their impact on the production of Atlantic salmon (Salmo salar) and sea trout (Salmo trutta). These two species of fish are an important economic, recreational and ecological resource, with a single salmon and a single sea trout estimated at EUR 4 273 and EUR 593, respectively including capital asset values.
Further information: Impact of beavers on salmon and trout