The community based monitoring work has also led to the identification of "lost" Atlantic salmon spawning areas, that are now subjects of a major restoration project (Mustonen, 2018a). The Lake is part of the larger Saimaa Lake system. Endangered lake salmon and freshwater seal inhabit the lake. Puruvesi is also home to one of the most traditional fishing communities in northern Europe, who practice the winter seiners of Puruvesi (Mustonen, 2014).