Invasion
Invasion Description
1st record: CA/San Francisco Bay (1946, Smith 1946, cited by Carlton 1979)
Geographic Extent
CA/Bodega Harbor (1949, Carlton 1979; Standing et al. 1976, cited by Carlton 1979); CA/Estero Americano (1977, Carlton 1979); CA/Tomales Bay (1954, Burch 1955, cited by Carlton 1979); CA/Bolinas Lagoon (Reiswig 1966, cited by Carlton 1979); CA/San Francisco Bay (1946, Smith 1946, cited by Carlton 1979); CA/San Pablo Bay to South San Francisco Bay (Cohen and Carlton 1995); China Camp/CA/San Pablo Bay (2005, Robinson et al. 2011); CA/Suisun Bay (Hopkins 1986); Sherman Island/CA/Sacramento San Joaquin Delta (Hopkins 1986); Brisbane/CA/Brisbane Lagoon, South San Francisco Bay (2004, Cohen et al. 2005); Fruitvale Bridge/Alameda/CA/Oakland Estuary (2004, Cohen et al. 2005); San Mateo Bridge Pylon/CA/South San Francisco Bay (2004, Cohen and Chapman 2005); CA/Elkhorn Slough (1949, Shaw 1950, cited by Carlton 1979); Highway I Bridge, Moss Landing/CA/Elkhorn Slough (Wasson 2001); CA/Morro Bay (1953, Carlton 1979, stocked, failed)
Vectors
| Level | Vector |
|---|---|
| Probable | Oyster Accidental |
Regional Impacts
| Economic Impact | Fisheries | |
| San Francisco Bay supports dense populations of Ruditapes philippinarum, which have attracted recreational clammers. However, water quality issues have limited harvests (California Department of Fish and Game 2001). In Tomales Bay, they are cultured as 'Manila Clams' in several shellfish farms, according to local websites. | ||
| Ecological Impact | Food/Prey | |
| Ruditapes philippinarum is a common food item for moon snails, sturgeon, gulls, shorebirds, ducks, and raccoons (Cohen and Carlton 1995). | ||