|Scientific Name:||Squalus altipinnis|
|Species Authority:||Last, White & Stevens, 2007|
Squalus sp. nov. C
|Taxonomic Notes:||This species was identified as Squalus sp. C. in Last and Stevens (1994). Revision of this genus from the Indo-Australian region revealed that two species were present (the other species is S. edmundsi which has a wider range than S. altipinnis).|
|Red List Category & Criteria:||Data Deficient ver 3.1|
|Assessor(s):||White, W., Cavanagh, R.D. & Lisney, T.J.|
|Reviewer(s):||Valenti, S.V., Gibson, C.G. & Fowler, S.L. (Shark Red List Authority)|
The Western Highfin Spurdog (Squalus altipinnis) is a deepwater dogfish, only known from two specimens. This species is only known from a very restricted area on the continental slope of Western Australia near Rowley Shoals in ~300 m of water. This area is subject to the North West Slope Trawl and Western Deepwater Trawl fisheries. Like other deepwater dogfishes, this species is likely to have the limiting life history characteristics making it inherently vulnerable to population depletion. Although there has been no assessment of the effect on the non-target bycatch species of these fisheries, fishing effort is small with only a few boats in operation. The lack of data on the species biology, extent of occurrence, population size, or any indicator of population trend warrants a Data Deficient assessment at this time.
|Range Description:||Known only from off the Rowley Shoals, Western Australia.|
Native:Australia (Western Australia)
|FAO Marine Fishing Areas:||
Indian Ocean – eastern
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||Known only off the continental slope of Western Australia near Rowley Shoals at depths of ~300 m. There is currently no information on population or subpopulation size.|
|Habitat and Ecology:||The biology of this dogfish is essentially unknown. It occurs at depths of ~300 m. Known only from two type specimens.|
Possibly caught as bycatch of the North West Slope Trawl and Western Deepwater Trawl fisheries, but these fisheries are small with only a few boats in operation, and although details on bycatch are currently unavailable, given the low fishing effort, it is unlikely the impact is cause for concern for this species at the present time.
Like other deepwater squaloid sharks, this species is likely to have the limiting life history characteristics and may not be sufficiently fecund to withstand high levels of exploitation.
|Citation:||White, W., Cavanagh, R.D. & Lisney, T.J. 2009. Squalus altipinnis. The IUCN Red List of Threatened Species. Version 2015.2. <www.iucnredlist.org>. Downloaded on 31 July 2015.|
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