Invasion
Invasion Description
1st Record: CA/Tomales Bay (1941, Carlton 1979; Byers 1999)
Geographic Extent
CA/Tomales Bay (1941, Carlton 1979; Byers 1999)
Vectors
| Level | Vector |
|---|---|
| Probable | Oyster Accidental |
Regional Impacts
| Ecological Impact | Competition | |
| The native snail Cerithidea californica declined an average of 27% over a 3-year period in coexisting California populations (Byers 1999). In experiments, Batillaria attramentaria was superior to C. calfornica in food conversion (Byers 2000a), hypoxia tolerance (Byers 2000b), and parasitism resistance (Byers and Goldwasser 2002). | ||