Grampus griseus

– Data Deficient

Taxonomy

Kingdom:

ANIMALIA

Phylum:

CHORDATA

Class:

MAMMALIA

Order:

CETACEA

Family:

DELPHINIDAE

Scientific Name:

Grampus griseus

Species Authority:

(G. Cuvier, 1812)

Common Name/s:

English	—	GREY DOLPHIN, RISSO'S DOLPHIN
French	—	DAUPHIN DE RISSO, GRAMPUS
Spanish	—	DELFÍN DE RISSO, FABO CALDERÓN

Assessment Information

Red List Category & Criteria:

DD ver 2.3 (1994)

Year Assessed:

1996

Annotations:

Needs updating

Assessor/s:

Cetacean Specialist Group

Justification:

Extract from Reeves et al. (2003, p. 40): "Risso’s Dolphins are abundant in tropical and temperate latitudes throughout the world’s oceans (Kruse et al. 1999). They prey almost exclusively on squid. A recent study of habitat preferences in the northern Gulf of Mexico indicated that Risso’s Dolphins occur mainly on steep sections of the upper continental slope (Baumgartner 1997). There are an estimated 29,000 off the eastern United States (Waring et al. 2001), 2700 in the northern Gulf of Mexico (Waring et al. 2001), 16,500 off the western United States (Carretta et al. 2001), 83,000 in three areas of concentrated occurrence off Japan (Miyashita 1993), and 175,000 in the eastern tropical Pacific (Wade and Gerrodette 1993).

Risso’s Dolphins are hunted regularly in Japan, with reported catches in recent years ranging from about 250–500 (see tables of catches of small cetaceans appended to annual reports of the Sub-committee on Small Cetaceans of the IWC’s Scientific Committee, published in the annual supplement of the Journal of Cetacean Research and Management). They are also a major target of artisanal hunting, and taken often in gillnets and other fishing gear in Sri Lanka and the Philippines. Populations in these areas with large kills have not been properly assessed."

History:

1994

Insufficiently Known (Groombridge 1994)

Geographic Range

Countries:

Native:

Albania; Anguilla; Antigua and Barbuda; Argentina; Aruba; Australia; Bahamas; Bangladesh; Barbados; Belgium; Bermuda; Bosnia and Herzegovina; Brunei Darussalam; Cambodia; Canada; Cayman Islands; Chile; China; Costa Rica; Croatia; Cuba; Denmark; Dominica; Dominican Republic; Estonia; Finland; France; Germany; Greece; Grenada; Haiti; India; Indonesia; Iran, Islamic Republic of; Iraq; Ireland; Italy; Jamaica; Japan; Jordan; Kenya; Korea, Republic of; Kuwait; Lebanon; Lithuania; Malaysia; Maldives; Malta; Mexico; Montenegro; Myanmar; Namibia; Netherlands; Netherlands Antilles; New Caledonia; New Zealand; Norway; Oman; Pakistan; Palau; Papua New Guinea; Philippines; Poland; Portugal; Puerto Rico; Qatar; Russian Federation; Saint Kitts and Nevis; Saint Lucia; Saint Pierre and Miquelon; Saint Vincent and the Grenadines; Saudi Arabia; Seychelles; Singapore; Slovenia; Solomon Islands; South Africa; Spain; Sri Lanka; Sweden; Syrian Arab Republic; Taiwan, Province of China; Tanzania, United Republic of; Thailand; Timor-Leste; Trinidad and Tobago; Turkey; United Arab Emirates; United Kingdom; United States; United States Minor Outlying Islands; Viet Nam; Virgin Islands, British; Virgin Islands, U.S.; Yemen

FAO Marine Fishing Areas:

Native:

Atlantic-eastern central; Atlantic-northeast; Atlantic-northwest; Atlantic-southeast; Atlantic-southwest; Atlantic-western central; Indian Ocean-eastern; Indian Ocean-western; Pacific-eastern central; Pacific-northeast; Pacific-northwest; Pacific-southeast; Pacific-southwest; Pacific-western central

Habitat and Ecology

System:

Marine

List of Habitats:

10.1	Marine Oceanic - Epipelagic (0-200m)

Threats

List of Threats:

3.1.2	Harvesting (hunting/gathering) - Food - Sub-national/national trade (ongoing)
4.1.1.2	Accidental mortality - Bycatch - Fisheries-related - Netting (ongoing)
4.1.1.3	Accidental mortality - Bycatch - Fisheries-related - Entanglement (ongoing)

Bibliography

Bibliography:

Baumgartner, M.F. 1997. The distribution of Risso’s Dolphin (Grampus griseus) with respect to the physiography of the northern Gulf of Mexico. Marine Mammal Science 13: 614–638.

Carretta, J.V., Barlow, J., Forney, K.A., Muto, M.M. and Baker, J. 2001. U.S. Pacific marine mammal stock assessments: 2001. NOAA Technical Memorandum, NOAA-TM-NMFS-SWFSC-317.

Groombridge, B. (ed.) 1994. 1994 IUCN Red List of Threatened Animals. IUCN, Gland, Switzerland.

Kruse, S., Caldwell, D.K. and Caldwell, M.C. 1999. Risso’s dolphin Grampus griseus (G. Cuvier, 1812). In: S.H. Ridgway and R. Harrison (eds), Handbook of Marine Mammals. Volume 6: The Second Book of Dolphins and the Porpoises, pp. 183-212. Academic Press, San Diego.

Miyashita, T. 1993. Abundance of dolphin stocks in the western North Pacific taken by the Japanese drive fishery. Report of the International Whaling Commission 43: 417–437.

Reeves, R.R., Smith, B.D., Crespo, E.A. and di Sciara, G.N. (compilers) 2003. Dolphins, Whales and Porpoises: 2002-2010 Conservation Action Plan for the World's Cetaceans. IUCN/SSC Cetacean Specialist Group. IUCN, Gland, Switzerland and Cambridge, UK.

Wade, P.R. and Gerrodette, T. 1993. Estimates of cetacean abundance and distribution in the eastern tropical Pacific. Report of the International Whaling Commission 43: 477–493.

Waring, G.T., Quintal, J.M. and Swartz, S.L. (eds). 2001. U.S. Atlantic and Gulf of Mexico marine mammal stock assessments – 2001. NOAA Technical Memorandum NMFS-NE-168. 310pp.

Citation:	Cetacean Specialist Group 1996. Grampus griseus. In: IUCN 2007. 2007 IUCN Red List of Threatened Species. <www.iucnredlist.org>. Downloaded on 06 September 2008.
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