Centroscymnus owstoni

• Overview
• Common Names
• Description
• Taxonomy
• Similar Species
• More Info
• Further Reading
• Notes

Overview

Family : Sleeper sharks ; Found on upper continental slopes , on or near the bottom [1]. Feeds on fish and cephalopods [2]. Flesh is high in mercury[2]. Utilized as fishmeal and source of squalene (liver oil )[2].

Common Names

Click on the language to view common names.

Description

Family Dalatiidae

Distribution: Antarctic to Arctic , Northern and Southern Hemisperes, coastal and oceanic . Includes four subfamilies (Etmopterinae, Somniosinae, Oxynotinae, and Dalatiinae). Except in Etmopterinae , most members without spines in dorsal fin; luminous organs present (except in Somniosus pacificus), appearing as black dots mainly on ventral surface. Etmopterinae has grooved spines in both dorsal fins, caudal fin with subterminal notch . Oxynotinae has very high, and compressed body, triangular in cross section ; dorsal fins very high, each with a spine[3]. The subfamilies are sometimes separated as independent families by various authors : Oxynotidae[1]; Somniosidae (dorsal fins without spines, first dorsal fin originating in front of pelvic fins but much closer to pectoral fins) and Etmopteridae (dorsal fin with spines, teeth with prominent central cusp flanked by one or two smaller cusplets )[4] . Dalatiidae has dorsal fins without spines, first dorsal fin originating in front of pelvic fins but much closer to pelvic fins[4].The family Dalatiidae belongs to the Class Elasmobranchii (sharks and rays ) and the Order Squaliformes. It contains 18 genera and 49 species. It may be found in Marine environments and is primarily Marine. Members of this family are not used in the aquarium trade. Reproductively, most members of this family are bearers. The main mode of swimming of adult fish in this family is subcarangiform. Etymology of this family name : Greek, dalos, -ou = torch

Habitat

Typically found in water with a depth of 0 to -4,898 meters (0 to -16,070 feet).[5]

Ecology: Marine , demersal , on the upper and middle continental slope , 250 to 1,500 m , usually 500 to 1,500 m.

Life history is not well known, but a typical deepwater shark , sometimes occurring in schools segregated by size and sex. Feed on fishes and squids .

Born 25 to 30 cm. Mature 70 to 79 cm (males), 82 to 105 (females). Maximum 120 cm. Some incomplete information on reproduction is presented by Yano and Tanaka (1987, 1988) and Daley et al. (2002), but the gestation period and reproductive cycle are not well known.


List of Habitats :10.1Marine Oceanic - Epipelagic (0-200m)

Taxonomy

Unambiguous Synonyms

1. Centroscymnus owstonii Garman, 1906

Notes

Name Status: Accepted Name . Latest taxonomic scrutiny: Group expert : Compagno L.J.V., Data last modified by FishBase 27-Oct-2000

Similar Species

Members of the genus Centroscymnus

There are approximately 14 species in this genus:

C. coelepis · C. coelepsis · C. coelolepis (Portuguese Dogfish) · C. coelolepsis · C. crepidater (Longnose Velvet Dogfish) · C. crepidator · C. cryptacanthus (Shortnose Velvet Dogfish) · C. fabricii · C. fuscus · C. macracanthus (Largespine Velvet Dogfish) · C. coelolepis · C. owstoni (Owston´s Dogfish) · C. owstonii · C. plunketi (Waites Deepsea Dogfish)

More Info

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• Search using Specialized Databases: GenBank | Medline | Scirus | CISTI/CAL | Agricola Periodicals | Agricola Books

Further Reading

• Bass, A.J. 1979. Records of little-known sharks from Australian waters. Proceedings of the Linnean Society N.S.W. 103(4): 247–254.
• Bulletin - United States National Museum. Washington: Smithsonian Institution Press, [etc.];1877-1971. ENG url p. 224.
• Bulletin of the Museum of Comparative Zoology at Harvard College. Cambridge, Mass.: The Museum, ENG url p. 50.
• 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. FAO Fish. Synop. No. 125, vol. 4.
• Daley, R., Stevens, J. and Graham, K. 2002. Catch analysis and productivity of the deepwater dogfish resource in southern Australia. Report by CSIRO Marine Research and NSW Fisheries to the Fisheries Research and Development Corporation. FRDC Project 1998/108.
• Davenport, S.R. and Deprez, P.P. 1989. Market opportunities for shark liver oil. Australian Fisheries 48(11): 8–10.
• Deprez, P.P., Volkman, J.K. and Davenport, S.R. 1990. Squalene content and neutral lipid composition of livers from deep-sea sharks caught in Tasmanian waters. Australian Journal of Marine and Freshwater Research 41(3): 375–387.
• Garrick, J.A.F. 1959. Studies on New Zealand elasmobranchii – part V111. Two northern hemisphere species of Centroscymnus in New Zealand waters. Transactions of the Royal Society of New Zealand 87(1&2): 75-89.
• Last, P.R. and Stevens, J.D. 1994. Sharks and Rays of Australia. CSIRO, Australia.
• Shark Specialist Group. For more information, see the Specialist Group website.
• Summers, G. 1987. Squalene – a potential shark by-product. Catch (N.Z. Ministry of Agriculture and Fisheries) 14(9): 29.
• Summers, G. 1987. Squalene – a potential shark by-product. Catch (N.Z. Ministry of Agriculture and Fisheries) 14(9): 29.
• Summers, G. and Wong, R. 1992. Cosmetic products from semi-refined shark liver oil. Infofish International 2/92: 55–58.
• Turoczy, N.J., Laurenson, L.J.B., Allinson, G., Nishikawa, M., Lambert, D., Smith, C., Cottier, J., Irvine, S. and Stagnitti, F. 2000. Observations on metal concentrations in three species of shark (Deania calcea, Centroscymnus crepidater and Centroscymnus owstoni) from southeastern Australian waters. Journal of Agricultural and Food Chemistry 48(9): 4357–4364.
• Wetherbee, B.M. 2000: Assemblage of deep-sea sharks on Chatham Rise, New Zealand. Fishery Bulletin 98: 189 – 198.
• Yano, K and Tanaka, S. 1987. Reproductive organs of deep sea sharks, Centroscymnus owstoni and C. coelolepis. Journal of the Faculty of Marine Sciences and Technology, Tokai University 25: 57–67.
• Yano, K. and Tanaka, S. 1983. Portuguese shark, Centroscymnus coelolepis from Japan, with notes on C. owstoni. Japanese Journal of Ichthyology 30(3): 208–216.
• Yano, K. and Tanaka, S. 1984. Some biological aspects of the deep sea squaloid shark Centroscymus from Suruga Bay, Japan. Bulletin of the Japanese Society of Scientific Fisheries 50(2): 249–256.

Notes

Contributors

• Bisby, F.A., Y.R. Roskov, M.A. Ruggiero, T.M. Orrell, L.E. Paglinawan, P.W. Brewer, N. Bailly, J. van Hertum, eds (2007). Species 2000 & ITIS Catalogue of Life: 2007 Annual Checklist. Species 2000: Reading, U.K.
• Brands, S.J. (comp.) 1989-2006. Systema Naturae 2000. The Taxonomicon. Universal Taxonomic Services, Amsterdam, The Netherlands. Accessed October 7, 2006.
• Compagno, Leonard J.V. (from FishBase).
• FishBase 2006.
• Global Biodiversity Information Facility. Accessed March 01, 2008. http://www.gbif.org Mediated distribution data from 4 providers.
• Ocean Biogeographic Information System. Accessed March 01, 2006. www.iobis.org
• Paul, L. 2003. Centroscymnus owstoni. In: IUCN 2006. 2006 IUCN Red List of Threatened Species. <www.iucnredlist.org>. Downloaded on 21 October 2006.
• Paul, L. (SSG Australia & Oceania Regional Workshop, March 2003) 2003. In IUCN 2008. 2008 IUCN Red List of Threatened Species. IUCNRedList.org. Downloaded July 18, 2008.

Data Sources

Accessed through GBIF Data Portal March 01, 2008:

• FishBase: FishBase DiGIR Provider - Philippine Server
• Institute of Marine and Coastal Sciences, Rutgers University: CSIRO Marine Data Warehouse (OBIS Australia)
• Institute of Marine and Coastal Sciences, Rutgers University: iziko South African Museum - Shark Collection
• Institute of Marine and Coastal Sciences, Rutgers University: SeamountsOnline (seamount biota)
• Institute of Marine and Coastal Sciences, Rutgers University: South Western Pacific Regional OBIS Data provider for the NIWA Marine Biodata Information System
• Museum national d'histoire naturelle: Ichtyologie
• OZCAM (Online Zoological Collections of Australian Museums) Provider: Online Zoological Collections of Australian Museums

Identifiers

• Biodiversity Heritage Library NamebankID: 3863147
• Catalogue of Life Accepted Name Code: Fis-29331
• Global Biodiversity Information Facility Taxonkey: 13743570
• IUCN ID: 41749
• Zipcode Zoo Species Identifier: 398008

Footnotes

1. 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 1. Hexanchiformes to Lamniformes. FAO Fish. Synop. (125, Vol. 4, Part 1), 249 p. [back]
2. Last, P.R. and J.D. Stevens (1994). Sharks and rays of Australia. CSIRO, Australia. 513 p. [back]
3. Wheeler, A. (1977). Das grosse Buch der Fische. Eugen Ulmer GmbH & Co. Stuttgart. 356 p. [back]
4. Ebert, D.A. (2003). Sharks, rays and chimaeras of California. California Natural History Guides No. 71. University of California Press, 284pp. [back]
5. Mean = -955.810 meters (-3,135.860 feet), Standard Deviation = 684.990 based on 3,778 observations. Ocean depth information for each observation from British Oceanographic Data Centre. [back]

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