|Scientific Name:||Typhlonarke aysoni|
|Species Authority:||(Hamilton, 1902)|
Astrape aysoni Hamilton,1902
|Red List Category & Criteria:||Data Deficient ver 3.1|
|Assessor(s):||Duffy, C. (SSG Australia & Oceania Regional Workshop, March 2003)|
|Reviewer(s):||Cavanagh, R.D. & Kyne, P.M. (Shark Red List Authority)|
Typhlonarke aysoni is a poorly known electric ray, endemic to New Zealand. It is apparently rare, however, its distribution and status is uncertain due to confusion with the similar T. tarakea. T. aysoni is potentially vulnerable to fisheries activity since its known distribution coincides with major trawl fishery grounds, but insufficient information is available to assess the species beyond Data Deficient at this time.
|Range Description:||Uncertain due to confusion with T. tarakea. Blind electric rays have been recorded off east coast North Island south of East Cape, South Island, Stewart Island, Chatham Rise (Mernoo Bank and Chatham Islands) and Snares Shelf to 49°S.|
|FAO Marine Fishing Areas:|
Pacific – southwest
|Range Map:||Click here to open the map viewer and explore range.|
|Current Population Trend:||Unknown|
|Habitat and Ecology:||Largely unknown. Blind electric rays of both species (T. aysoni and T. tarakea) have been trawled from 46 to 800 m, but are most common between 300-400 m. The flabby disc and rudimentary tail suggest blind electric rays are very poor swimmers and they probably push themselves along the bottom with their well- developed pelvic appendages. Diet includes polychaete worms. Reproduction is probably ovoviviparous. Litter size is up to 11. Size at birth is 9 to 10 cm. Maximum size 38 cm total length.|
|Major Threat(s):||Bottom trawling.|
|Conservation Actions:||There are currently no conservation measures in place for this species.|
Anderson, O.F., Bagley, N.W., Hurst, R.J., Francis, M.P., Clark, M.R. and McMillan, P.J. 1998. Atlas of New Zealand fish and squid distributions from research bottom trawls. NIWA Technical Report 42. NIWA, Wellington. 303 pp.
Garrick, J.A.F. 1951. The blind electric rays of the genus Typhlonarke (Torpedinidae). Zoology Publications from Victoria University College. No. 15.
IUCN. 2003. 2003 IUCN Red List of Threatened Species. www.iucnredlist.org. Downloaded on 18 November 2003.
IUCN SSC Shark Specialist Group. Specialist Group website. Available at: http://www.iucnssg.org/.
|Citation:||Duffy, C. (SSG Australia & Oceania Regional Workshop, March 2003). 2003. Typhlonarke aysoni. The IUCN Red List of Threatened Species 2003: e.T41867A10564854.Downloaded on 18 August 2017.|