1st Record: Coasters Harbor Island, Newport/RI/East Passage, Narragansett Bay (2000, MIT Sea Grant 2003-2007). Didemnum vexillum was present at 9 of 43 sites in 2005, but only 5 of 32 sites. Occurrences were correlated with salinity, and the species did not persist where surface salinitiesdropped bleow 20 PSU (Auker 2019).
South Pier, Prudence Island/RI/Narragansett Bay (2005, Auker and Oviatt 2008; Absent 2015, Auker 2019); Fort Wetherill, Jamestown/RI/East Passage, Narragansett Bay (2005, Auker and Oviatt 2008; Auker 2019); Jamestown Boatyard, Jamestown/RI/Narragansett Bay (Ruiz et al., unpublished data); New England Boatworks, Jamestown/RI/Narragansett Bay (Ruiz et al., unpublished data); Coasters Harbor Island, Newport/RI/East Passage, Narragansett Bay (2000, MIT Sea Grant 2003-2007) ; Fort Adams State Park/Newport/RI/Narragansett Bay (2010, Massachusetts Office of Coastal Zone Management 2013); URI Dock, Graduate School of Oceanography (2002, USGS Woods Hole Science Center 2003-2007; Auker and Oviatt 2008), ; 41 deg 29.3 min N lat, 71 deg 25.5 min W lo), Beavertail Point, Jamestown/RI/Narragansett Bay (2005, USGS Woods Hole Science Center 2007).
|In Narragansett Bay, Didemnum dominated plates in the fall, and overgrew recruits of the Blue Mussel (Mytilus edulis) (Auker and Oviatt 2008).|
ReferencesAuker, Linda A.; Oviatt, Candace A. (2008) Factors influencing the recruitment and abundance of Didemnum in Narragansett Bay, Rhode Island., ICES Journal of Marine Science 65: 765-769
Auker, Linda A.; Oviatt, Candace A. (2007) Observations on the colonization of the invasive tunicate Didemnum sp., Rhode Island Naturalist 14(1): 1-2
Bullard, S. G. and 15 authors. (2007) The colonial ascidian Didemnum sp. A: Current distribution, basic biology and potential threat to marine communities of the northeast and west coasts of North America., Journal of Experimental Marine Biology and Ecology 342: 99-108
Massachusetts Office of Coastal Zone Management (2013) Rapid assessment survey of marine species at New England floating docks and rocky shores, Massachusetts Office of Coastal Zone Management, Boston MA. Pp. <missing location>
2003-2008 Introduced and cryptogenic species of the North Atlantic. http://massbay.mit.edu/exoticspecies/exoticmaps/introduced.html
2004-2011 Marine invasive species: <i>Didemnum vexillum</i>, a colonial tunicate; ascidian; sea squirt.. Web Page: http://woodshole1.er.usgs.gov/project-pages/stellwagen/didemnum/pdf_index.htm