Centroscyllium kamoharai — Details

Bareskin Dogfish learn more about names for this taxon

Overview

Comprehensive Description

Biology

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Found on the continental slope (Ref. 6871, 75154). Little is known of its biology; presumably ovoviviparous (Ref. 6871).
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Distribution

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Western Pacific: Japan and Australia (including Western Australia).
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Range Description

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Fairly broadly distributed in deep water in western Pacific. Restricted to a depth range of 500 to 1,200 m with possibly only limited exchange between subpopulations.
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Western Pacific; antitropical.
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Physical Description

Size

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Maximum size: 600 mm TL
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Max. size

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60.0 cm TL (male/unsexed; (Ref. 6871))
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Ecology

Habitat

Environment

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bathydemersal; marine; depth range 730 - 1200 m (Ref. 6871), usually 900 - 1200 m (Ref. 6871)
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Habitat and Ecology

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Habitat and Ecology
Habitat: on or near bottom on continental and insular slopes and seamounts, depth range 500 to 1,200 m. A little-known deepwater dogfish. Matures at 40 to 45 cm, maximum length 60 cm, litters of 3 to 22 pups, average 12. No seasonal reproductive cycle, no information on annual fecundity, gestation period, age at maturity or longevity. Like other deepwater dogfishes, this species likely has a very low resilience to depletion and a low intrinsic rate of population increase, hence highly vulnerable to bycatch in deepwater fisheries.

Systems
  • Marine
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Depth range based on 6 specimens in 1 taxon.
Water temperature and chemistry ranges based on 3 samples.

Environmental ranges
  Depth range (m): 920 - 1130
  Temperature range (°C): 3.882 - 5.777
  Nitrate (umol/L): 30.134 - 33.558
  Salinity (PPS): 34.432 - 34.480
  Oxygen (ml/l): 3.772 - 4.226
  Phosphate (umol/l): 1.914 - 2.023
  Silicate (umol/l): 30.075 - 50.515

Graphical representation

Depth range (m): 920 - 1130

Temperature range (°C): 3.882 - 5.777

Nitrate (umol/L): 30.134 - 33.558

Salinity (PPS): 34.432 - 34.480

Oxygen (ml/l): 3.772 - 4.226

Phosphate (umol/l): 1.914 - 2.023

Silicate (umol/l): 30.075 - 50.515
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
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Depth: 730 - 1200m.
From 730 to 1200 meters.

Habitat: bathydemersal. Found on the continental slope (Ref. 6871). Little is known of its biology; presumably ovoviviparous (Ref. 6871).
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Life History and Behavior

Life Cycle

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Distinct pairing with embrace (Ref. 205).
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Centroscyllium kamoharai

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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

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Red List Category
DD
Data Deficient

Red List Criteria

Version
3.1

Year Assessed
2003

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

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

Justification
A little-known deepwater dogfish likely to be highly vulnerable to population depletion through fisheries bycatch because of its highly K-selected biology. Fairly broad but patchy occurrence through the Western Pacific, but records are sparse and the species is not abundant in bycatch in any deepwater fishery. The lack of data on extent of occurrence, population size, or any indicator of population trend is considered to warrant a Data Deficient assessment, despite concerns that bycatch has been occurring and will continue to occur in deepwater fisheries, possibly through most of the species? range.
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Population

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Population
No information on population or subpopulation size, but apparently not abundant (records are infrequent).

Population Trend
Unknown
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Threats

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Data deficient (DD)
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Major Threats
Bycatch in deep trawl fisheries, but no data on catches and trends.
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Management

Conservation Actions

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Conservation Actions
No conservation measures are currently in place for this species.
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Relevance to Humans and Ecosystems

Benefits

Importance

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fisheries: of no interest
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Wikipedia

Bareskin dogfish

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The bareskin dogfish, Centroscyllium kamoharai, is a little-known, deepwater dogfish shark of the family Dalatiidae, so far found only in the western Pacific in Suruga Bay, Honshū, Japan.

The bareskin dogfish has no anal fin. It has grooved dorsal spines with the second larger than the first, a smaller first dorsal fin, blunt nose, large eyes, large nostrils, widely spaced and sparse denticles, and is dark in color with white-tipped fins. It is stout and grows to a maximum of 40 cm.

Little else is known about this rare shark.

References

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