Invasion
Invasion Description
1st Record: WA/Grays Harbor (1930, Carlton 1979)
Geographic Extent
WA/Grays Harbor (1930, Carlton 1979; Feldman 2000)
Vectors
| Level | Vector |
|---|---|
| Probable | Oyster Intentional |
Regional Impacts
| Economic Impact | Fisheries | |
| Grays Harbor is a major oyster-growing area, producing 10% of the US oyster crop, through intensively managed culture. A negative impact of this aquaculture operation is the use of the pesticide carbaryl to kill the mud shrimps Neotrypaea californiensis and Upogebia pugettensis, which interfere with oyster culture by burrowing and suspending sediment. The pesticide also kills juvenile Dungeness Crabs (Metacarcinus magister), English sole (Parophrys vetulus), and other commerical and sport fishery species, as well as raising general environmental concerns (Feldman et al. 2000). | ||