Invasion
Invasion Description
1st Record: OR/Umpqua Bay (cultured 1948+, Woelke 1955, cited by Carlton 1979)
Geographic Extent
OR/Umpqua Bay (cultured 1948+, Woelke 1955, cited by Carlton 1979, culture continues in Winchester Bay (a subestuary) Oregon Department of State Lands 2011, http://www.oregon.gov/DSL/SSNERR/docs/EFS/EFS34aquaculture.pdf?ga=t)
Vectors
| Level | Vector |
|---|---|
| Probable | Fisheries Accidental (not Oyster) |
Regional Impacts
| Economic Impact | Fisheries | |
| Culture of M. gigas continues in Winchester Bay (a subestuary) to the present day (Oregon Department of State Lands 2011, http://www.oregon.gov/DSL/SSNERR/docs/EFS/EFS34aquaculture.pdf?ga=t) | ||
| Ecological Impact | Parasite/Predator Vector | |
| Parasite-Predator vector- The introduction of M. gigas has been a possible/probable vector for a number of oyster foulers or predators in Umpqua Bay including the bryozoan Schizoporella japonica, and the tunicates Botrylloides violaceus, Didemnum vexillum and Styela clava (Carlton 1979; Cohen and Carlton 1995; USGS Nonindigenous Aquatic Species Program 2010). | ||