Aulohalaelurus kanakorum — Details

Kanakorum Catshark learn more about names for this taxon

Overview

Comprehensive Description

Biology

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A rare inshore catshark found on coral reefs (Ref. 11146).
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Distribution

Range Description

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The holotype (and only known specimen) was collected from the coral bottom in the pass of an islet on the external coral reef of a south-western New Caledonian lagoon. There are also underwater photographs of two specimens. The fish fauna of New Caledonia has been well surveyed, suggesting that this species is rare. It is, however, presumably present at similar depths and in similar habitat elsewhere around the island.

New Caledonia has approximately 8,000 km² of coral reef habitat surrounding a lagoon of 24,000 km². Much of this habitat is significantly shallower than the type locality, implying that the total extent of occurrence of this species around the island will be less than 20,000 km², even if the species is very widespread (which appears not to be the case).
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Western Central Pacific: known from a single specimen collected off southwestern New Caledonia.
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Physical Description

Morphology

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Dorsal spines (total): 0; Dorsal soft rays (total): 0; Analspines: 0; Analsoft rays: 0
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Size

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Maximum size: 790 mm TL
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Max. size

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79.0 cm TL (male/unsexed; (Ref. 11146))
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Ecology

Habitat

Habitat and Ecology

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Habitat and Ecology
Inshore on an external coral reef at a depth of 49 m. Catsharks are generally weak swimmers and do not migrate large distances. They mostly feed on invertebrates and small fishes.

Systems
  • Marine
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Depth range based on 2 specimens in 1 taxon.
Water temperature and chemistry ranges based on 1 sample.

Environmental ranges
  Depth range (m): 49 - 49
  Temperature range (°C): 26.331 - 26.331
  Nitrate (umol/L): 0.079 - 0.079
  Salinity (PPS): 35.145 - 35.145
  Oxygen (ml/l): 4.764 - 4.764
  Phosphate (umol/l): 0.189 - 0.189
  Silicate (umol/l): 1.100 - 1.100
 
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Depth: 0 - 49m.
Recorded at 49 meters.

Habitat: reef-associated.
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Environment

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reef-associated; marine; depth range ? - 49 m (Ref. 11146)
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Conservation

Conservation Status

IUCN Red List Assessment

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Red List Category
VU
Vulnerable

Red List Criteria
B1ab(iii)

Version
3.1

Year Assessed
2003

Assessor/s
Fowler, S.L. & Lisney, T.J. (SSG Australia & Oceania Regional Workshop, March 2003)

Reviewer/s
Stevens, J., Seret, B., Fowler, S. & Musick, J.A. (Shark Red List Authority)

Justification
This species is known from only one specimen and two photographs within an area that is well surveyed for its fish fauna. It is very likely a New Caledonian endemic and uncommon within its range. It is presumed, like similar taxa, to be a benthic species and a weak swimmer, restricted to a narrow depth band of moderately deep external coral reef habitat, hence having a small extent of occurrence. This restricted range and fragile nature of the coral reef habitat makes the species vulnerable to depletion through bycatch in mixed species fisheries and to habitat deterioration and loss as a result of run off from mining operations and coral reef bleaching.
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Population

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Population Trend
Unknown
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Threats

Threats

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Major Threats
This small (79 cm), attractively patterned catshark is likely to be taken as bycatch in mixed-species, artisanal fisheries and to be susceptible to habitat deterioration and loss. New Caledonian coral reefs are in generally good condition, but large areas (particularly in the east) are affected by run-off arising from nickel mining operations and resultant deforestation, erosion and water pollution. The problem is exacerbated by destruction of mangroves. The incidence of coral reef bleaching is also rising in the region (ReefBase).
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Vulnerable (VU) (B1ab(iii))
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Management

Conservation Actions

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Conservation Actions
There are currently no conservation measures in place for this species.
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Wikipedia

New Caledonia catshark

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The New Caledonia catshark, Aulohalaelurus kanakorum, is a catshark of the family Scyliorhinidae in the order Carcharhiniformes, known only from one specimen collected near southwestern New Caledonia in the western central Pacific Ocean. The holotype measured 79 cm.

The New Caledonia catshark is a rare and vulnerable inshore catshark found around coral reefs.

See also

References


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