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Squalus nasutus

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA CHORDATA CHONDRICHTHYES SQUALIFORMES SQUALIDAE

Scientific Name: Squalus nasutus
Species Authority: Last, Marshall & White, 2007
Common Name/s:
English Western Longnose Spurdog
Synonym/s:
Squalus sp. subspecies E

Assessment Information [top]

Red List Category & Criteria: Data Deficient ver 3.1
Year Published: 2003
Date Assessed: 2003-04-30
Assessor/s: Cavanagh, R.D. & Lisney, T.J. (SSG Australia & Oceania Regional Workshop, March 2003)
Reviewer/s: Shark Specialist Group Australia & Oceania Regional Group (Shark Red List Authority)
Justification:
Little is known of the biology of this dogfish though it is likely to have the limiting life history characteristics similar to other deepwater shark species, thus will not be sufficiently fecund to withstand high levels of exploitation. It occurs on the continental slope off Western Australia with a depth range of 300 to 510 m. This area is subject to the North West Slope Trawl and Western Deepwater Trawl fisheries. Although there has been no assessment of the effect on the non-target bycatch species of these fisheries, which will likely include Squalus nasutus, 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.

Geographic Range [top]

Range Description: This species was known as Squalus sp. E in Last and Stevens (1994). Known to occur on the continental slope off Western Australia at depths of 300 to 510 m.
Countries:
Native:
Australia (Western Australia)
FAO Marine Fishing Areas:
Native:
Indian Ocean – eastern
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: There is currently no information on population or subpopulation size.
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: The biology of this dogfish is essentially unknown. It occurs at depths of 300 to 510 m, and unlike most spurdogs, which occur in schools, appears to be solitary. It reaches at least 56 cm, with males maturing at around 50 cm.
Systems: Marine

Threats [top]

Major Threat(s): The area and depth range at which this species is known to occur falls within the North West Slope Trawl and Western Deepwater Trawl fishery areas. However, fishing effort is 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.

Conservation Actions [top]

Conservation Actions: Currently there are no conservation measures in place for this species.
Citation: Cavanagh, R.D. & Lisney, T.J. (SSG Australia & Oceania Regional Workshop, March 2003) 2003. Squalus nasutus. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 24 April 2014.
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