Invasion
Invasion Description
1st record: Loring/AK/Behm Canal (Inside Passage) (1903, USNM 5633. U.S. National Museum of Natural History 2003; Lambert 2003); Stuart Island/British Columbia/Queen Charlotte Strait (1937, Lambert 2003).
The Alaska and British Columbia records are museum specimens which have been identified as C. savignyi. These records may represent a cryptogenic northern population. However, specimens collected from marinas in Puget Sound appear to be recent invaders (Lambert 2003).
Geographic Extent
Loring/AK/Belum Canal (Inside Passage) (1903, USNM 5633. U.S. National Museum of Natural History 2003; Lambert 2003); Stuart Island/British Columbia/Queen Charlotte Strait (1937, Lambert 2003); Calvert Island//British Columbia/Hakai Passage (2017, Lambert 2019, 51.6º N, 128.1º E,); Des Moines Marina/WA/Puget Sound (1998, Lambert 2003); Edmonds /WA/Puget Sound (1999; Cordell et al. 2012); Tacoma Yacht Club/WA/Puget Sound (1998, Lambert 2003); Brownsville Yacht Club/WA/Puget Sound (1998, Lambert 2003); Tacoma Yacht Club/WA/Puget Sound (2001, Lambert 2003); Elliott Bay Marina, Seattle/WA/Elliott Bay (2004, Center for Aquatic Resource Studies 2008; Cordell et al. 2012); Tahuya and Union, Sund Rock's North Wall, Jorsted Creek Pinnacle, West Wall of Pulali Point, East Wall, Pulali Point/WA/Hood Canal (2005, Pacific NW Scuba, http://www.pnwscuba.com/critterwatchers/ciona.htm; Center for Aquatic Resource Studies 2008); Port Orchard Marina, in Port Orchard/WA/Sinclair Inlet [Puget Sound] (2006, USGS Nonindigenous Aquatic Species Program 2008); Winslow Marina in Winslow, Bainbridge Island/WA/Eagle Harbor [Puget Sound] (2006, USGS Nonindigenous Aquatic Species Program 2008); San Juan Island/WA/Puget Sound (2008, USGS Nonindigenous Aquatic Species Program 2008); Lagoon Point/WA/Puget Sound (2010, Cordell et al. 2012)
Vectors
| Level | Vector |
|---|---|
| Probable | Hull Fouling |
Regional Impacts
References
Cohen, Andrew; and 16 authors. (1998) <missing title>, Washington State Department of Natural Resources, Olympia, Washington. Pp. 1-37Cordell, Jeffery R.; Levy, Claire; Toft, Jason D. (2012) Ecological implications of invasive tunicates associated with artificial structures in Puget Sound, Washington, USA, Biological Invasions 15(6): 1303-1318
Lambert, Gretchen (2003) New records of ascidians from the NE Pacific: a new species of Tridemnum, range extension and description of Aplidiopsis pannosum (Ritter, 1899), including its larva, and several non-indigenous species., Zoosystema 24(4): 665-675
Pool, Thomas K.; Luis, Sean; Olden, Julian D. (2013) Assessing lethal dissolved oxygen tolerance for invasive tunicate Ciona savignyi in Puget Sound, Northwest Science 87(2): 106-113
2002-2021 Invertebrate zoology collections database. http://collections.nmnh.si.edu/search/iz/
2003-2015 Nonindigenous Aquatic Species Database. Gainesville, FL. http://nas.er.usgs.gov