Invasion
Invasion Description
CA/Drakes Estero (commercial culture, 1932 to present, several spawnings observed, 1949-1952, Carlton 1979, Conte 1996)
Geographic Extent
CA/Drakes Estero (commercial culture, 1932 to present, several spawnings observed, 1949-1952, Carlton 1979, Conte 1996)
Vectors
| Level | Vector |
|---|---|
| Probable | Oyster Intentional |
Regional Impacts
| Economic Impact | Fisheries | |
| Commercial culture of M. gigas began in Drakes Estero in 1932 and continues to the present. Oyster culture here was intially dependent on seed imported from Japan, but now uses seed produced in US hatcheries (Barrett 1963, Conte 1996). Drakes Estero is one of the two most important oyster-growing sites in California About 90% of production occurred in Drakes Estero and Humboldt Bays (Conte 1996). | ||
| Ecological Impact | Parasite/Predator Vector | |
| None | ||