Smith, P.J.; Page, M.; Handley, S.J.; McVeagh, S.M.; Ekins, M. (2007). First record of the Australian ascidian Eudistoma elongatumin northern New Zealand. New Zealand Journal of Marine and Freshwater Research. 41(4): 347-355.

287216

10.1080/00288330709509924 [view]

Smith, P.J.; Page, M.; Handley, S.J.; McVeagh, S.M.; Ekins, M.

2007

41(4): 347-355

Publication

Available for editors   [request]

A colonial ascidian was first reported by marine farmers in Houhora Harbour, Northland, New Zealand in early 2005 and subsequently found on oyster racks in Parengarenga Harbour and the Bay of Islands. The Northland ascidian was identified with a combination of morphological characters and DNA cytochrome c oxidase I (COI) sequence data, as Eudistoma elongatum, a species native to Australia, where it is found from northern New South Wales to Northern Queensland, and distinguished from Eudistoma circumvallatum, the only reported species in this genus from New Zealand. Ascidian larvae are weak dispersers and long distance dispersal of E. elongatum is likely to be enhanced by vectors such as oyster barges and/or movement of cultured oysters. In its native range, E. elongatum is restricted to areas with a minimum winter sea temperature of 16°C. Assuming similar biological limitations apply in New Zealand, the spread of E. elongatum might be restricted to northern New Zealand (north of latitude 37°S)

New Zealand

Systematics, Taxonomy

Ascidiacea

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