Invasion
Invasion Description
1st Record: Honshu/Japan/Tokyo bay (1967, Uemori and Horikoshi 1991; Ueda 2000; Baker et al. 2007)
Geographic Extent
Honshu/Japan/Tokyo Bay (1967, Uemori and Horikoshi 1991; Ueda 2000; Baker et al. 2007); Honshu/Japan/Sagami Bay (1991, Ueda 2000; Baker et al. 2007); Japan/Inland Sea (Yoshiyasu et al. 2004, cited by Baker et al. 2007)
Vectors
| Level | Vector |
|---|---|
| Alternate | Ballast Water |
| Alternate | Hull Fouling |
| Alternate | Fisheries Intentional |
| Alternate | Fisheries Accidental (not Oyster) |
Regional Impacts
| Ecological Impact | Competition | |
| Competition between P. viridis and native benthic fauna is suspected (Chavanich et al. 2010). | ||
| Ecological Impact | Habitat Change | |
| Death and deposition of P. viridis in winter may cause hypoxic conditions (Chavanich et al. 2010). | ||
| Economic Impact | Fisheries | |
| Fouling of cultured bivalves by P. viridis is suspected to reduce their growth (Chavanich et al. 2010). | ||
| Economic Impact | Industry | |
| Perna viridis is considered to be the second most expensive fouling organism of power plants in Japanese waters, next to Mytilus galloprovincialis, causing major expenses for damage and cleaning (Iwasaki 2006). | ||