Invasion
Invasion Description
1st record: Victoria/Hobson's Bay, Port Phillip Bay (Holmes 1982, cited by Keough and Ross 1999)
Geographic Extent
Victoria/Hobson's Bay, Port Phillip Bay (Holmes 1982, cited by Keough and Ross 1999); Queenscliff/Victoria/Bass Strait (Keough and Ross 1999); Mornington/Victoria/ Port Phillip Bay (2001, Mackie et al. 2006); Williamstown/Victoria/Port Phillip Bay (2001, Mackie et al. 2006); St. Kilda/Victoria/Port Phillip Bay (2001, Mackie et al. 2006); Victoria/Corio Bay (Keough and Ross 1999); Mersey Yacht Club, Devonport/Tasmania/Bass Strait (2001, Mackie et al. 2006)
Vectors
| Level | Vector |
|---|---|
| Probable | Hull Fouling |
Regional Impacts
| Ecological Impact | Competition | |
| In Port Phillip bay, W. subtorquata, arriving in 1976, quickly replaced W. arcuata at most locations (Keough and Ross 1999). Heavy recruitment of W. subtorquata can affect subsequent community development. However, impacts varied by site and season (Sams and Keough 2012). | ||