Overview

Comprehensive Description

Biology

Oviparous (Ref. 50449).
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Distribution

Range Description

In the Northeast Atlantic, this species occurs from northern Bay of Biscay and Porcupine Seabight to Lousy Bank (49 31.9N to 60 49.7N).The depth range is1,0141,800m.

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Eastern North Atlantic.
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Northeast Atlantic.
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Physical Description

Diagnostic Description

Body slender and cylindrical. Dermal denticles from dorsolateral side of body small and erect.
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Type Information

Paratype for Apristurus aphyodes Nakaya & Stehmann
Catalog Number: USNM 347837
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Year Collected: 1981
Locality: Hebridean Terrace, Scotland, United Kingdom, Atlantic
Depth (m): 1500 to 1500
Vessel: Walther Herwig
  • Paratype: Nakaya, K. & Stehmann, M. 1998. Archive of Fishery and Marine Research. 46 (1): 79, figs 1-4.
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology

This species is known from 30 specimens taken from the Northeast Atlantic slope at depths of 1,0141,800 m. It occurs on or near the bottom over upper to mid continental and insular slopes where the bottom temperature is 3.79.6C and salinity is 35.134.9 ppm.

This catshark is relatively small and sluggish. The maximum reported size for the species is 54 cm total length (TL). Males and females are adolescent at 40 cm and 46 cm TL, and mature at 47 cm and 50 cm TL, respectively. It is an egg-laying species, but nothing else is known about reproduction (Nakaya and Stehmann 1998, Ebert and Stehmann 2013).


Systems
  • Marine
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Depth range based on 11 specimens in 1 taxon.
Water temperature and chemistry ranges based on 8 samples.

Environmental ranges
  Depth range (m): 1019 - 1745
  Temperature range (°C): 3.756 - 6.617
  Nitrate (umol/L): 15.688 - 18.903
  Salinity (PPS): 34.928 - 35.180
  Oxygen (ml/l): 5.541 - 6.273
  Phosphate (umol/l): 1.072 - 1.224
  Silicate (umol/l): 9.210 - 13.127

Graphical representation

Depth range (m): 1019 - 1745

Temperature range (°C): 3.756 - 6.617

Nitrate (umol/L): 15.688 - 18.903

Salinity (PPS): 34.928 - 35.180

Oxygen (ml/l): 5.541 - 6.273

Phosphate (umol/l): 1.072 - 1.224

Silicate (umol/l): 9.210 - 13.127
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
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Environment

bathypelagic; marine; depth range 1014 - 1800 m (Ref. 31787)
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Depth range based on 11 specimens in 1 taxon.
Water temperature and chemistry ranges based on 8 samples.

Environmental ranges
  Depth range (m): 1019 - 1745
  Temperature range (°C): 3.756 - 6.617
  Nitrate (umol/L): 15.688 - 18.903
  Salinity (PPS): 34.928 - 35.180
  Oxygen (ml/l): 5.541 - 6.273
  Phosphate (umol/l): 1.072 - 1.224
  Silicate (umol/l): 9.210 - 13.127

Graphical representation

Depth range (m): 1019 - 1745

Temperature range (°C): 3.756 - 6.617

Nitrate (umol/L): 15.688 - 18.903

Salinity (PPS): 34.928 - 35.180

Oxygen (ml/l): 5.541 - 6.273

Phosphate (umol/l): 1.072 - 1.224

Silicate (umol/l): 9.210 - 13.127
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Life History and Behavior

Life Cycle

Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449).
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2015

Assessor/s
Walls, R.

Reviewer/s
Kemp, J.R. & Duffy, C.A.J.

Contributor/s
Huveneers, C.

Justification

White Ghost Catshark (Apristurus aphyodes) is a deepwater catshark known only from a limited number of specimens taken from upper to mid continental and insular slopes in the Northeast Atlantic at depths of 1,0141,800 m. Most of this species range is outside the reach of deepwater fisheries. Its limited interaction with deepwater fisheries suggests that overexploitation risk is low; therefore it is assessed as Least Concern in European waters.


History
  • 2004
    Data Deficient (DD)
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Population

Population

The population trend is unknown for this species. The zero Total Allowable Catch (TAC) and zero bycatch measures in place for certain deepwater sharks in European Commission (EC) waters may impede the collection of catch and landings data because of potential increased discarding (ICES 2013).


Population Trend
Unknown
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Threats

Major Threats

Apristurus species are sometimes caught in large numbers since deepwater trawl fishing began along the Northeast Atlantic continental slopes in the 1990s (Ebert and Stehmann 2013). If these deepwater fisheries expand into this species depth range, bycatch should be monitored. At present there are no signs of deepwater fishery expansion in European waters.

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Data deficient (DD)
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Management

Conservation Actions

Conservation Actions

Based on advice from the International Council for the Exploration of the Sea to end fishing for deepwater sharks, the European Union Fisheries Council established a TAC (total annual catch) covering this species in 2007 (CEC 2012). This TAC was gradually reduced until 2010 when it was set at zero. Since 2012, there has also been a zero bycatch limit (ICES 2007). The harvesting trends of the species should be monitored.

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Wikipedia

White ghost catshark

The white ghost catshark, Apristurus aphyodes, is a shark of the family Scyliorhinidae found in deep water in the northeast Atlantic between latitudes 57°N and 58°N. A deep-water catshark known from the eastern North Atlantic from depths of 1,014 to 1,800 m, it is known from only a limited number of specimens. It reaches a maximum of 54 cm total length, but little known of its biology. Insufficient information is available to assess the species' status, so it is to be considered Data Deficient.

See also[edit]

References[edit]

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