Overview

Comprehensive Description

Biology

Found on the continental shelves, (Ref. 244), on or near the bottom (Ref. 30573). Attains a maximum size of 37.0 cm TL; female of 36.8 cm TL was gravid and contained eight egg cases, four in each uterus (Ref. 86593). Feeds on shrimps. Collection by deep-sea shrimp trawlers may indicate that the species could have a wider depth distribution, possibly down to 280 m (Ref. 86593). Not utilized at present (Ref. 244).
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Distribution

Range Description

Western Indian Ocean: Somalia, India (Compagno 1984).
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Western Indian Ocean: Somalia (Indian Ocean coast) and India (Arabian Sea), offshore on continental slope (Ref. 86593).
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Western Indian Ocean: Somalia and India.
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Physical Description

Size

Maximum size: 350 mm TL
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Max. size

31.5 cm TL (male/unsexed; (Ref. 86593)); 36.8 cm TL (female)
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Diagnostic Description

Description

Found on the continental shelves. Not utilized at present.
  • Anon. (1996). FishBase 96 [CD-ROM]. ICLARM: Los Baños, Philippines. 1 cd-rom pp.
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A small shark with numerous (>20) vertical stripes on the body without dark spots, snout tip knoblike but not prominently upturned. Eyes in adults 12–13 times in distance from snout to first dorsal origin. Anterior nasal flaps sub triangular. Gills dorsolaterally placed and elevated above the mouth level. First dorsal-fin origin about opposite pelvic-fin insertion. Light brown above with pale ventral side, dark brown cross bands on the body (Ref. 86593).
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
A little known catshark preferring the tropical offshore waters of the continental shelf and found on or near the bottom at depths of 54?186 m (Compagno 1984). The biology of this species is largely unknown, but size at birth is ~8 cm total length (TL), males mature at 28?35 cm TL and it reaches a maximum size of about 35 cm (Compagno 1984).

Systems
  • Marine
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Environment

demersal; marine; depth range 54 - 187 m (Ref. 58018)
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Depth range based on 3 specimens in 1 taxon.
Water temperature and chemistry ranges based on 2 samples.

Environmental ranges
  Depth range (m): 60 - 65
  Temperature range (°C): 23.296 - 23.296
  Nitrate (umol/L): 8.732 - 8.732
  Salinity (PPS): 35.456 - 35.456
  Oxygen (ml/l): 3.338 - 3.338
  Phosphate (umol/l): 0.867 - 0.867
  Silicate (umol/l): 9.298 - 9.298

Graphical representation

Depth range (m): 60 - 65
 
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Depth: 54 - 186m.
From 54 to 186 meters.

Habitat: demersal.
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Trophic Strategy

Feeds on shrimps. Collection of H. quagga from deepsea shrimp trawlers indicate that the species could have a wider depth distribution, possibly down to 280 m (Ref. 86593).
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Halaelurus quagga

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 2
Species With Barcodes: 1
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
DD
Data Deficient

Red List Criteria

Version
3.1

Year Assessed
2009

Assessor/s
Cronin, E.S.

Reviewer/s
Valenti, S.V. & Fowler, S.L. (Shark Red List Authority)

Contributor/s

Justification
The Quagga Catshark (Halaelurus quagga) is a very poorly known, small demersal catshark occurring in tropical offshore waters of the Somalian and Indian continental shelf in the western Indian Ocean. Occurs at depths of 54?186 m. The biology of this species is largely unknown, but it reaches a maximum size of about 35 cm TL. It is a potential bycatch of demersal trawl and other demersal fisheries operating within its range, but no specific details are available. Insufficient information is available to assess this species beyond Data Deficient at present. Research is required on this species' abundance, full distribution and capture in fisheries.
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Population

Population
Unknown.

Population Trend
Unknown
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Threats

Major Threats
This species is presumably taken as bycatch in demersal trawl and other demersal fisheries operating within its range, although no specific information is available. Demersal fishing pressure is very intensive off India and Somalia but little information is currently available on the elasmobranch catch (Young et al. 2006).
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Data deficient (DD)
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Management

Conservation Actions

Conservation Actions
No management or conservation efforts are currently in place. Research is required on this species? occurrence, life-history parameters, capture in fisheries and population trends.

The development and implementation of management plans (national and/or regional e.g., under the FAO International Plan of Action for the Conservation and Management of Sharks: IPOA-Sharks) are required to facilitate the conservation and management of all chondrichthyan species in the region.
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Relevance to Humans and Ecosystems

Benefits

Importance

fisheries: of no interest
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