Васильевский остров
Fish catchment decreased 10 times between 1989 and 2005. Apart from pollution, another reason for that is hydraulic and engineering works. For example, construction of new ports in Ust-Luga and Vysotsk and on Vasilyevsky Island adversely affected the spawning of fish. Extraction of sand and gravel in the Neva Bay for the land reclamation destroy spawning sites of European smelt.