Overview
Comprehensive Description
Biology
Biology little-known. Oviparous. Utilized for oil, human consumption and fishmeal or fish cakes.
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Compagno, L.J.V. 1984 FAO species catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 2 - Carcharhiniformes. FAO Fish. Synop. 125(4/2):251-655. (Ref. 244)
http://www.fishbase.org/references/FBRefSummary.php?id=244&speccode=857
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Distribution
Range Description
The holotype was recorded from Choshi, Japan (Nakaya 1975). The species is distributed from Fukushima to Chiba Prefecture, northern Japan (Nakaya unpub. data). Records south of this (from southern Japan and southern Japanese Islands) are now considered incorrect and have resulted from misidentification with other species (Nakaya unpublished data).
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Northwest Pacific: off Chiba Prefecture, Honshu, Japan. Collected from the East China Sea (Ref. 559).
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Compagno, L.J.V. 1984 FAO species catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 2 - Carcharhiniformes. FAO Fish. Synop. 125(4/2):251-655. (Ref. 244)
http://www.fishbase.org/references/FBRefSummary.php?id=244&speccode=857
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FishBase
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Physical Description
Size
Max. size
71.0 cm TL (male/unsexed; (Ref. 244)); 63 cm TL (female)
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Compagno, L.J.V. 1984 FAO species catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 2 - Carcharhiniformes. FAO Fish. Synop. 125(4/2):251-655. (Ref. 244)
http://www.fishbase.org/references/FBRefSummary.php?id=244&speccode=857
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Ecology
Habitat
Habitat and Ecology
Habitat and Ecology
Systems
The Japanese Catshark is reported from depths of 600 to 800 m. Males begin to mature at 51 cm TL and females begin to mature at 55 cm TL. All males are mature at 62 cm TL and all females at 57 cm TL. Reproduction is single oviparous species, with one egg case peroviduct (Nakaya 1975 unpublished data).
Systems
- Marine
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Depth range based on 1 specimen in 1 taxon.
Environmental ranges
Depth range (m): 150.5 - 150.5
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
Environmental ranges
Depth range (m): 150.5 - 150.5
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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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)
http://www.fishbase.org/references/FBRefSummary.php?id=205&speccode=1256
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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
Nakaya, K. & McCormack, C.
Reviewer/s
Valenti, S.V., Stevens, J., Fowler, S.L. & SSG Asia Northwest Pacific Red List Workshop participants (Shark Red List Authority)
Contributor/s
Justification
The Japanese Catshark (Apristurus japonicus) is distributed from Fukushima to Chiba Prefecture on the Pacific coast of northern Japan, at depths of 600–800 m. The species has a limited range and very little is known of its biology. The Japanese Catshark is taken as bycatch by bottom trawl and gillnet fisheries but no data are available on catches or population trends. It cannot be assessed beyond Data Deficient due to a lack of information; however its limited range and potentially vulnerable life-history characteristics are of concern. It is possible that declines have already occurred and this species may qualify for a threatened category in the future. Bycatch levels should be quantified and this assessment should be revisited in the near term.
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Trends
Population
Population
Population Trend
Apparently rare. No information is available on population size or abundance.
Population Trend
Unknown
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IUCN
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Threats
Threats
Major Threats
This species is taken as bycatch in bottom trawl and gillnet fisheries operating within its range, but no data are available on catch levels or population trends. Given the species’ limited range and potential biological vulnerability, any bycatch may be of concern.
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Data deficient (DD)
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IUCN 2006 2006 IUCN red list of threatened species. www.iucnredlist.org. Downloaded July 2006.
http://www.fishbase.org/references/FBRefSummary.php?id=57073
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FishBase
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Management
Conservation Actions
Conservation Actions
No management or conservation efforts are currently in place. Like many deeper water species more information on biology, ecology and importance in fisheries are required to further assess status and any future conservation needs. Where taken, catches require monitoring, particularly as deepwater fisheries expand worldwide.
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.
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: minor commercial
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Coppola, S.R., W. Fischer, L. Garibaldi, N. Scialabba and K.E. Carpenter 1994 SPECIESDAB: Global species database for fishery purposes. User's manual. FAO Computerized Information Series (Fisheries). No. 9. Rome, FAO. 103 p. (Ref. 171)
http://www.fishbase.org/references/FBRefSummary.php?id=171&speccode=2534
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FishBase
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Wikipedia
Japanese catshark
The Japanese catshark, Apristurus japonicus, is a cat shark of the family Scyliorhinidae found in the northwest Pacific from off Chiba Prefecture, Honshū, Japan between latitudes 36° N and 34° N. Its length is up to 71 cm, and it can be found at depths of up to 2,000 m.
References
- Froese, Rainer, and Daniel Pauly, eds. (2006). "Apristurus japonicus" in FishBase. July 2006 version.
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