Invasion
Invasion Description
1st Records?: Nyanza/Nova Scotia/Bras d'Or Lakes (2006, Sephton et al. 2011); Canso/Nova Scotia/Atlantic Ocean (2006, Sephton et al. 2011); Port Bickerton East/Nova Scotia/Atlantic Ocean (2006, Sephton et al. 2011); Fox Point (south of Halifax)/Nova Scotia/Atlantic Ocean (2006, Sephton et al. 2011)
Geographic Extent
Hermitage/Newfoundland/Atlantic Ocean (2008, Callahan et al. 2010, 47.5563 -55.9259); 2012, McKenzie et al. 2016); Baine Harbour/Newfoundland/Placentia Bay (2010, Fisheries and Oceans Canada 2011); North Harbour/Newfoundland/Placentia Bay (2008, Callahan et al. 2010, 47.8590 -54.1000); Arnold's Cove/Newfoundland/Placentia Bay (2008, Callahan et al. 2010, Ma et al. 2011, Ma et al. 2017, 47.8747 -54.1682); Argentia/Newfoundland/Placentia Bay (2008, Callahan et al. 2010; Ma et al. 2011, 47.2920 -53.9904); Foxtrap/Newfoundland/Conception Bay (2011, McKenzie et al. 2016); Long Pond/Newfoundland/Conception Bay (2012, McKenzie et al. 2016); Sydney, Cape Breton Island/Nova Scotia (2007, Sephton et al. 2011; Yund et al. 2015); Louisbourg, Cape Breton Island/Nova Scotia/Atlantic Ocean (Clade A, Bock et al. 2012; Yund et al. 2015); Cape Breton Island/Nova Scotia/Bras d'Or Lakes (Locke et al. 2007); St. Peters, Cape Breton Island/Nova Scotia/Atlantic Ocean (Clade A, Bock et al. 2012); Arichat/Nova Scotia/Strait of Canso (2006, Sephton et al. 2011); Nyanza/Nova Scotia/Bras d'Or Lakes (2006, Sephton et al. 2011); Canso/Nova Scotia/Atlantic Ocean (2006, Sephton et al. 2011); Port Bickerton East/Nova Scotia/Atlantic Ocean (2006, Sephton et al. 2011); Halifax/Nova Scotia/Halifax Harbour (2008, Lacoursiere-Roussel et al. 2016); Fox Point (south of Halifax)/Nova Scotia/Atlantic Ocean (2006, Sephton et al. 2011); Lunenburg/Nova Scotia/Mahone Bay, Atlantic Ocean (Locke et al. 2007; Yund et al. 2015); Port l'Hebert/Nova Scotia/Port Herbert River (Wong and Vercaemer 2012); Shelburne/Nova Scotia/Atlantic Ocean (Yund et al. 2015; Lacoursiere-Roussel et al. 2016); Ingomar/Nova Scotia/Atlantic Ocean (Clade A Bock et al. 2012; Yund et al. 2015)
Vectors
| Level | Vector |
|---|---|
| Alternate | Hull Fouling |
| Alternate | Fisheries Accidental (not Oyster) |
Regional Impacts
| Ecological Impact | Competition | |
| The native eelgrass Zostera marina was adversely affected by fouling by Botryllus schlosseri. However, fouling by a native sponge, Halichondria panicea, produced a greater reduction of chlorophyll than Botryllus schlosseri or any of the morphs of B. violaceus (Wong and Vercaemer 2012). | ||
| Ecological Impact | Habitat Change | |
| The spread of introduced fouling organisms (B. schlosseri and B. violaceus) to eelgrass beds is considered likely to reduce the primary productivity and the extent of grass beds in Nova Scotia waters (Wong and Vercaemer 2012). | ||