Invasion
Invasion Description
1st Record: Berkeley Marina /CA/San Francisco Bay (1973, Cohen and Carlton 1995)
Geographic Extent
Twin Sisters/CA/San Pablo Bay (1983, Josselyn and West 1985, infrequent, 37.988333, -122.441111); Berkeley Marina /CA/San Francisco Bay (1973, Cohen and Carlton 1995); Golden Gate Bridge, San Francisco/CA/Golden Gate (1984, Silva 1979, Danek 1984, cited by Cohen and Carlton 1996); San Francisco Yacht Harbor/CA/San Francisco Bay (1984, Silva 1979, Danek 1984, cited by Cohen and Carlton 1996); Tiburon/CA/San Francisco Bay (1983, Josselyn and West 1985); ; Alameda/CA/San Francisco Bay (1984, Silva 1979, Danek 1984, cited by Cohen and Carlton 1996); Sausalito/CA/San Francisco Bay (1984, Silva 1979, Danek 1984, cited by Cohen and Carlton 1996) ; Pier 39, San Francisco/CA/San Francisco Bay (2004, Cohen et al. 2005); Presidio Yacht Club, San Francisco/CA/Golden Gate (2004, Cohen et al. 2005); Fruitvale Bridge, Alameda/CA/Oakland estuary 2004, Cohen et al. 2005);
Vectors
| Level | Vector |
|---|---|
| Alternate | Ballast Water |
| Alternate | Hull Fouling |
| Alternate | Natural Dispersal |
Regional Impacts
| Ecological Impact | Habitat Change | |
| In field cage experiments, juvenile Chinook Salmon (Oncorhynchus tshawystcha) were reared in several habitats, bare sand, Eelgrass (Zostera marina, Sargassum muticum and mixed Eelgrass-Sargassum. Growth was best in the mixed habitat, suggesting that habitat variety is important (Hughes et al. 2020). | ||