[n = 8]
Year / Period | From | To | Established | Ecol. effects |
---|---|---|---|---|
unknown | Unknown | Ontario | established | |
1954 - 1956 | Caspian Sea | Aral Sea | established | |
1985 | Central Europe | Germany | established | unknown |
1986 | Unknown | Dnieper and Pripyat | established | no data |
1990 | Unknown | USA | established | |
2002 | Germany | Netherlands | established | unknown |
2006 | Unknown | Neva River Baltic Sea | established | |
2008 | Unknown | Poland | established |