Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Chondrichthyes Orectolobiformes Brachaeluridae

Scientific Name: Brachaelurus colcloughi
Species Authority: Ogilby, 1908
Common Name(s):
English Colclough's Shark, Bluegrey Carpetshark, Bluegray Carpetshark
Heteroscyllium colcloughi (Ogilby, 1908)

Assessment Information [top]

Red List Category & Criteria: Vulnerable C2a(ii) ver 3.1
Year Published: 2009
Date Assessed: 2005-10-01
Assessor(s): Compagno, L.J.V., Last, P. & Stevens, J.
Reviewer(s): Musick, J.A. & Fowler, S.L. (Shark Red List Authority)
This assessment is based on the information published in the 2005 shark status survey (Fowler et al. 2005).

The Bluegrey Carpetshark (Heteroscyllium colcloughi) is a rare to uncommon species, endemic to the east coast of Australia and with a poorly known biology. Fewer than 20 specimens of this small, attractive but poorly known shark are recorded, mostly from inshore waters of Moreton Bay, Queensland. This shark seems to be rare as far as is known, despite coverage of available habitat. As presently known it has an extremely limited geographic and bathymetric range off Queensland and occurs in waters that are heavily utilised by people and which are subjected to intensive fisheries.
Previously published Red List assessments:
2000 Vulnerable (VU)

Geographic Range [top]

Range Description: Inshore on the continental shelf in shallow water (5 m), of the east Coast of Australia, western South Pacific. Most records are from Moreton Bay near Brisbane, Queensland, with a few records from southern Queensland between Gladstone and Coolangatta, and in north-eastern Queensland off York Peninsula and the Great Barrier Reef (Last and Stevens 1994, Compagno 2001). No subpopulation details; possibly only one population exists.
Countries occurrence:
Australia (New South Wales, Queensland)
FAO Marine Fishing Areas:
Pacific – western central
Lower depth limit (metres): 5
Range Map: Click here to open the map viewer and explore range.

Population [top]

Current Population Trend: Unknown
Additional data:
Population severely fragmented: No

Habitat and Ecology [top]

Habitat and Ecology: An ovoviviparous species, with 6-8 pups per litter. Term foetuses are 174-186 mm; size at birth is probably 17-18 cm. Maximum size is at least 75.5 cm. Pregnant females have been recorded at 65.8-75.5cm and males are adolescent at about 48.2-51.6 cm. Age at maturity, average reproductive age and longevity are all unknown (Compagno 2001). The behavioural ecology of this shark needs to be investigated. Studies should include underwater census and tagging.
Systems: Marine

Use and Trade [top]

Use and Trade: Caught as limited inshore bycatch of fisheries and exploited at low levels for the marine aquarium trade.

Threats [top]

Major Threat(s): Bluegrey Carpetsharks are caught as limited inshore bycatch of fisheries and exploited at low levels for the marine aquarium trade. No information is available on trends in numbers or range, but they are not found in quantity at any locality despite reasonable survey coverage. Habitat degradation could become a problem as human usage of coastal waters increases, since it has a restricted distribution to areas heavily utilized by humans.

Conservation Actions [top]

Conservation Actions: Only limited areas of its habitat are protected on the Great Barrier Reef, and the species is not directly protected.

Citation: Compagno, L.J.V., Last, P. & Stevens, J. 2009. Brachaelurus colcloughi. The IUCN Red List of Threatened Species 2009: e.T39335A10203671. . Downloaded on 09 October 2015.
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