Invasion
Invasion Description
1st Record: CA/San Francisco Bay (1st planting 1869, Collins 1892, cited by Carlton 1979)
Geographic Extent
CA/Tomales Bay (1875, decline after 1900, holding of adult oysters continued to 1970s, Carlton 1979); CA/Drakes Estero (1949, for holding, Bonnot 1949, cited by Carlton 1979); CA/San Francisco Bay (1st planting 1869, Collins 1892, cited by Carlton 1979; numerous plantings, some settlement observed, 1870s to 1890, fishery was dependent on seed shipped from Atlantic Coast, fishery ceased by 1930s, Carlton 1979); CA/Elkhorn Slough (1st planted 1923, again in 1932, Bonnot 1935, cited by Carlton 1979); CA/Morro Bay (1938, one planting, Barrett 1963, cited by Carlton 1979)
Vectors
| Level | Vector |
|---|---|
| Probable | Oyster Intentional |
Regional Impacts
| Ecological Impact | Parasite/Predator Vector | |
| While C. virginica has not become established in central California waters, Eastern Oyster introductions have been a probable/possible vector for many fouling organisms and predators including Cliona sp. (boring sponges) and other sponges, polychaetes [Alitta (=Neanthes, Nereis), Streblospio benedicti], slippershells (Crepidula convexa, C. plana), Atlantic Oyster Drill (Urosalpinx cinerea), and tunicates (Botryllus schlosseri, Molgula manhattensis) (Carlton 1979; Cohen and Carlton 1995; Wasson et al. 2001; de Rivera et al. 2005). | ||