Invasion
Invasion Description
1st Record: WA/Puget Sound (Galtsoff 1932, cited by Carlton 1979; Cohen et al. 1998)
Geographic Extent
WA/Puget Sound (Galtsoff 1932, cited by Carlton 1979; Cohen et al. 1998); WA/Hood Canal, Puget Sound (1960, oyster beds, ANSP 243672, Academy of Natural Sciences of Philadelphia 2007); near Olympia/WA/Puget Sound (1962, MCZ MCZ 239571, Museum of Comparative Zoology 2007); Thurston County/WA/Mud Bay, Eld Inlet (Houart and Sirenko 2003); Shelton/WA/Oakland Inlet (Houart and Sirenko 2003)
Vectors
| Level | Vector |
|---|---|
| Probable | Oyster Accidental |
Regional Impacts
| Economic Impact | Fisheries | |
| Ocinebrellus inornatus is 'very destructive to native oysters in Puget Sound' (Galtsoff 1932). However, O. inornatus prefers small individuals of the introduced Pacific Oyster (Crassostrea gigas) to same-sized juveniles of the native O. lurida (Olympia Oyster) (Buhle and Ruesink 2009; Grason and Miner 2012a). | ||
| Ecological Impact | Predation | |
| Ocenebrellus inornatus is 'very destructive to native oysters in Puget Sound' (Galtsoff 1932). However, O. inornatus prefers small individuals of the introduced Pacific Oyster (Crassostrea gigas) to same-sized juveniles of the native O. lurida (Olympia Oyster) (Buhle and Ruesink 2009; Grason and Miner 2012a). However, O. inornatus was a more significant predator on Olympia oysters, than native rock crabs (Cancridae), and suffered little predation from the crabs (Grason and Buhle 2016). | ||
| Ecological Impact | Food/Prey | |
| The Red Rock Crab (Cancer productus) is a predator on Oyster Drills, both the Japanese O. inornatus and the Atlantic Urosalpinx cinerea, and prefers juvenile drills to adults. However, the crabs prefer juvenile C. gigas to both species of snail, and so may contribute to oyster mortality, rather than reducing it (Grason and Miner 2012a). The two introduced snails both show behavioral responses, hiding and reduced feeding, in the presence of the native crabs (Grason and Miner 2012b). | ||