Dipturus campbelli
– Near Threatened
Taxonomy
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Kingdom:
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ANIMALIA
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Phylum:
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CHORDATA
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Class:
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CHONDRICHTHYES
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Order:
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RAJIFORMES
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Family:
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RAJIDAE
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Scientific Name:
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Dipturus campbelli
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Species Authority:
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(Wallace, 1967)
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Common Name/s:
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Taxonomic Notes:
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Recently incorrectly synonymised with D. pullopunctata (Smith 1964) by Hulley (1988), this species is distinct (Compagno et al. 1989).
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Assessment Information
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Red List Category & Criteria:
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NT ver 3.1 (2001)
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Year Assessed:
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2004
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Assessor/s:
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Smale, M.J. (SSG Subequatorial Africa Regional Workshop, September 2003)
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Evaluator/s:
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Cavanagh, R.D., Kyne, P.M. & Fowler, S.L. (Shark Red List Authority)
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Justification:
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Despite recent research surveys within the known area of occurrence of this endemic species, it appears to have a very limited and patchy distribution off the east coast of South Africa (Durban) and Mozambique (Barra Falsa). Although no data is available on trends in catches of this species, it is thought to be vulnerable to trawl fisheries occurring in the area. This together with its limited distribution and possible small population warrants enough concern to list this endemic skate as Near Threatened. Further studies are needed on biology, status and threats.
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Geographic Range
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Range Description:
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The limited range off two areas off Durban and Barra Falsa.
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Countries:
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Native:
Mozambique; South Africa (KwaZulu-Natal)
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FAO Marine Fishing Areas:
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Native:
Indian Ocean-western
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Population
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Population:
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The limited range may suggest a small, possibly fragmented population.
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Population Trend:
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Habitat and Ecology
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Habitat and Ecology:
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A poorly known skate of the shelf and upper slope at depths of 137 to 403 m.
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System:
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Marine
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List of Habitats:
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| 10.1 | Marine Oceanic - Epipelagic (0-200m) |
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Threats
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Threats:
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Trawling and longline fishing
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List of Threats:
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| 4.1.1.1 | Accidental mortality - Bycatch - Fisheries-related - Hooking (ongoing) |
| 4.1.1.2 | Accidental mortality - Bycatch - Fisheries-related - Netting (ongoing) |
| 4.1.1.3 | Accidental mortality - Bycatch - Fisheries-related - Entanglement (ongoing) |
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Conservation Actions
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Conservation Actions:
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No conservation measures are in place for this species. Further studies are needed on biology, status and threats.
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List of Conservation Actions:
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| 2.3 | Communication and Education - Capacity-building/Training (in place, needed) |
| 3.2 | Research actions - Population numbers and range (needed) |
| 3.3 | Research actions - Biology and Ecology (needed) |
| 3.6 | Research actions - Uses and harvest levels (needed) |
| 3.9 | Research actions - Trends/Monitoring (needed) |
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Bibliography
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Bibliography:
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Compagno, L.J.V., Ebert, D.A. and Smale, M.J. 1989. Guide to the sharks and rays of Southern Africa. Struik, Cape Town. 160 pp. Hulley, P.A. 1988. Family No. 25 Rajidae. In: Smiths’ Sea Fishes 1st edition. Southern Book Publishers, Johannesburg. Shark Specialist Group. For more information, see the Specialist Group website. Wallace, J.H. 1967. The batoid fishes of the east coast of southern Africa. Part III: Skates and elecric rays. Oceanographc Research Institute Investatory Report No. 17. 62 pp.
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