Species Regional Summary
Mytilicola orientalis
Willapa Bay ( P270 )

Invasion History Vectors Impacts References

Invasion

Invasion Description

1st Record: WA/Willapa Bay (1938, in Crassostrea gigas, Wilson 1938, cited by Carlton 1979

Geographic Extent

WA/Willapa Bay (1938, in Crassostrea gigas, Wilson 1938, cited by Carlton 1979; Chew et al. 1964a, cited by Carlton 1979); WA/Willapa Bay (1963-65, Katkansky et al. 1967, in C. gigas)

Vectors

Level Vector
Alternate Oyster Accidental
Probable Hull Fouling

Regional Impacts

Ecological ImpactParasitism
Infection with M. orientalis resulted in reduced condition factor in Olympia Oyster (Ostrea lurida) in Willapa Bay (Oldaug 1946). Reduced condition factor was also reported in infected Pacific Oysters (Crassostrea gigas) in Humboldt, Yaquina, and Willapa Bays. However, no relation was seen between infection and mortality (Chew et al. 1965; Katkansky et al. 1967).
 
Economic ImpactFisheries
Infection resulted in reduced condition factor(increased water, reduced fat) in Olympia Oyster (Ostrea lurida) in Willapa Bay (Oldaug 1946). Reduced condition factor was also reported in infected Pacific Oysters (Crassostrea gigas) in Humboldt, Yaquina, and Willapa Bays. However, no relation was seen between infection and mortality (Chew et al. 1965; Katkansky et al. 1967).
 

References

Full Reference List for Mytilicola orientalis

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