Overview

Comprehensive Description

Biology

Oviparous (Ref. 50449).
  • Nakaya, K. and M. Stehmann 1998 A new species of deep-water catshark, Apristurus aphyodes n. sp., from the Eastern North Atlantic (Chondrichthyes: Carchariniformes: Scyliorhinidae). Arch. Fish. Mar. Res. 46(1):77-90. (Ref. 31787)
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Distribution

Range Description

The species is found in the eastern North Atlantic: Northern Bay of Biscay and Porcupine Seabight to Lousy Bank (49° 31.9’N to 60°49.7’N).
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Eastern North Atlantic.
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Northeast Atlantic.
  • Nakaya, K. and M. Stehmann 1998 A new species of deep-water catshark, Apristurus aphyodes n. sp., from the Eastern North Atlantic (Chondrichthyes: Carchariniformes: Scyliorhinidae). Arch. Fish. Mar. Res. 46(1):77-90. (Ref. 31787)
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Physical Description

Diagnostic Description

Body slender and cylindrical. Dermal denticles from dorsolateral side of body small and erect.
  • Nakaya, K. and M. Stehmann 1998 A new species of deep-water catshark, Apristurus aphyodes n. sp., from the Eastern North Atlantic (Chondrichthyes: Carchariniformes: Scyliorhinidae). Arch. Fish. Mar. Res. 46(1):77-90. (Ref. 31787)
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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
Known from 30 type specimens taken on the eastern North Atlantic slope at 1,014 to 1,800 m depth. Occurs at bottom temperatures of 3.67 to 9.57°C, and salinities of 35.13 to 34.87 ppm. Males and females are adolescent at 40 to 46 cm TL, and fully mature at 47 to 50 cm TL. Maximum reported size is 54 cm TL. Reproduction is oviparous but egg cases are unknown (Nakaya and Stehmann 1998).

Apristurus species are relatively small, sluggish sharks that live on or near the bottom over upper to mid continental and insular slopes. Diet includes crustaceans (penaeid shrimps, euphausiids), squids and small fishes. Where known, egg cases are usually thick-walled and about 5 to 6.8 cm long and 2.5 to 2.9 cm wide. The anterior end of the case has a long weak fibrous thread on each corner. The posterior end usually has two small processes, each with a long coiled tendril. As in shallow water scyliorhinids the coiled tendrils are probably used to attach the egg cases to hard substrates and/or biogenic structures as they are laid.

Systems
  • Marine
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Environment

bathypelagic; marine; depth range 1014 - 1800 m (Ref. 31787)
  • Nakaya, K. and M. Stehmann 1998 A new species of deep-water catshark, Apristurus aphyodes n. sp., from the Eastern North Atlantic (Chondrichthyes: Carchariniformes: Scyliorhinidae). Arch. Fish. Mar. Res. 46(1):77-90. (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).
  • Breder, C.M. and D.E. Rosen 1966 Modes of reproduction in fishes. T.F.H. Publications, Neptune City, New Jersey. 941 p. (Ref. 205)
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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
2004

Assessor/s
Duffy, C. & Huveneers, C.

Reviewer/s
Kyne, P.M., Cavanagh, R.D. & Fowler, S.L. (Shark Red List Authority)

Contributor/s

Justification
A deepwater catshark known from the Eastern North Atlantic from depths of 1,014 to 1,800 m. Known from only a limited number of specimens. Reaches a maximum of 54 cm total length (TL) but little known of its biology. Insufficient information is available to assess the species beyond Data Deficient.
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Population

Population
Population size and trends are not known.

Population Trend
Unknown
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Threats

Major Threats
Other species of deepwater Chondrichthyans are known to be captured as bycatch in deepwater fisheries. As these fisheries expand globally, consideration needs to be given to the fact that this species too may be captured incidentally in deepwater fisheries.
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Data deficient (DD)
  • IUCN 2006 2006 IUCN red list of threatened species. www.iucnredlist.org. Downloaded July 2006.
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Management

Conservation Actions

Conservation Actions
No conservation measures are known to be in place for this species.
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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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