Invasion
Invasion Description
Helgsingfors/Denmark (1878, Gislen 1950)
Geographic Extent
Grebbestad/Sweden/Kattegat; Torekov/Sweden/Kattegat (1902, Gislen 1950); Varberg/Sweden/Kattegat (1935, Gislen 1950); Goteborg/Sweden/Kattegat (1929, Gislen 1950)
Vectors
| Level | Vector |
|---|---|
| Alternate | Natural Dispersal |
| Alternate | Hull Fouling |
| Alternate | Ballast Water |