|Scientific Name:||Centroscyllium nigrum Garman, 1899|
Centroscyllium ruscosum Gilbert, 1905
|Red List Category & Criteria:||Data Deficient ver 3.1|
|Reviewer(s):||Kyne, P.M., Ebert, D.A., Cavanagh, R.D. & Fowler, S.L. (Shark Red List Authority)|
A poorly known deepwater shark from the Central and Eastern Pacific in depths of 250 to 1,250 m. Taxonomic resolution is required as specimens from southern Chile to the Strait of Magellan may represent a separate species. Associated with both soft sand and mud bottoms, but may also feed off the bottom. Little known of its biology. Grows to about 50 cm total length (TL), and is aplacental viviparous with litters of at least seven. This species is captured in small numbers as bycatch in the Chilean deep sea shrimp fishery, and in sablefish traps in California, where it is not utilized. In Californian waters they do not appear to occur in large concentrations, as do other members of the genus (such as C. fabricii) in the Atlantic Ocean (D. Ebert, pers. comm). Bycatch numbers need to be monitored; however, at present there is insufficient information available to access the species beyond Data Deficient.
|Range Description:||Central Pacific: Hawaiian Islands; Eastern Pacific: southern California (USA), Panama, Cocos Islands, Columbia, Ecuador, Chile (northern, central and southern) to Straits of Magellan, Galapagos Islands (Compagno in prep. a). Specimens from southern Chile to the Strait of Magellan may represent a separate species and taxonomic resolution is required (D. Ebert, pers. comm.).
Taken only sporadically in Californian waters (D. Ebert, pers. comm).
Native:Chile; Cocos (Keeling) Islands; Colombia; Ecuador (Galápagos); Panama; United States (California, Hawaiian Is.)
|FAO Marine Fishing Areas:|
Pacific – eastern central; Pacific – southeast
|Range Map:||Click here to open the map viewer and explore range.|
|Current Population Trend:||Unknown|
|Habitat and Ecology:||Little is known of this deepwater dogfish, which has been recorded from the continental and insular slopes at depths of 400 to 1,143 m (Compagno, in prep. a), although recorded off Chile as shallow as 300 m and off California in depths of 250 to 1,250 m (D. Ebert, pers. comm.). Biology is poorly known. Maximum size 50 cm total length (TL). Size at birth 11 to 13 cm TL. Neonates have an internal yolk sac for nourishment (Ebert 2003). Males adult at 35 to 43 cm TL (Compagno, in prep. a). Females become adult at 43 cm TL (Ebert 2003). Aplacental viviparous with a litter size of at least seven young. |
Associated with benthic soft mud and sand habitats, but may also feed off the bottom (Compagno, in prep. a). The species feeds on deepwater shrimps, cephalopods, and small mesopelagic bony fishes (Ebert 2003). Based on the presence of mesopelagic prey items this species may migrate into the water column to feed (Ebert 2003).
|Major Threat(s):||Sporadic bycatch in the Chilean deep sea shrimp (Heterocarpus reedi) fishery off Northern and Central Chile (from 25º07'41" to 34º18'43"S and 259-500 m) in small numbers although more abundantly than Centroscyllium granulatum (González 2001, Acuña and Villaroel 2002). Incidentally captured in sablefish traps in California, but it is not utilized (Compagno in preparation a).|
Acuña, E. and Villaroel, J.C. 2002. Bycatch of sharks and rays in the deep sea crustacean fishery off the Chilean coast. Shark News 14: 16-18.
Compagno, L.J.V. 1984. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 1. Hexanchiformes to Lamniformes. FAO Fish. Synop., (125) Vol. 4(1).
Compagno, L.J.V. In prep. a. Sharks of the World. An annotated and illustrated catalogue of the shark species known to date. Volume 1. (Hexanchiformes, Squaliformes, Squatiniformes and Pristiophoriformes). FAO Species Catalogue for Fisheries Purposes No. 1, Vol.1. FAO, Rome.
Ebert, D.A. 2003. Sharks, Rays and Chimaeras of California. University of California Press, Berkeley.
González, J.L. 2001. Fauna íctica concurrente en la pesquería del camarón nailon, Heterocarpus reedi Bahamonde, 1955, entre la II y VIII Regiones (25º01' S y 36º04' S). Tesis para optar al Título de Biólogo Marino, Universidad Católica del Norte ? Sede Coquimbo.
IUCN. 2004. 2004 IUCN Red List of Threatened Species. Available at: www.iucnredlist.org. (Accessed: 23 November 2004).
IUCN SSC Shark Specialist Group. Specialist Group website. Available at: http://www.iucnssg.org/.
|Citation:||Acuña, E. 2004. Centroscyllium nigrum. The IUCN Red List of Threatened Species 2004: e.T44514A10909588.Downloaded on 22 September 2018.|
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