Invasion

Invasion Description

1st Record: Sczeczin/Poland/Sczeczin Lagoon (1928, Grabowski et al. 2005). Genetic studies indicate that Polish populations are derived from those breeding in the Elbe River and other North Sea tributaries (Czerniejewski et al. 2012).

Geographic Extent

Sczeczin/Poland/Sczeczin Lagoon (1928, Grabowski et al. 2005); Germany-Sweden-Poland/Western Baltic; Wroclaw (Breslau)/Poland/Oder-Odra River (1934, Herborg et al. 2003)