Risso's Dolphin
Size comparison against an average human
Conservation status
Data deficient (IUCN)
Scientific classification
Kingdom: Animalia Phylum: Chordata Class: Mammalia Subclass: Eutheria Order: Cetacea Suborder: Odontoceti Family: Delphinidae Genus: Grampus Species: G. griseus
Binomial name
Grampus griseus (G. Cuvier, 1812)
Risso's Dolphin range

The Risso's Dolphin (Grampus griseus) is the only species of dolphin in the genus Grampus. from http://nmml. ... Image File history File links This is a lossless scalable vector image. ... The conservation status of a species is an indicator of the likelihood of that species continuing to survive either in the present day or the future. ... The IUCN Red List of Threatened Species (also known as the IUCN Red List and Red Data List), created in 1963, is the worlds most comprehensive inventory of the global conservation status of plant and animal species and can be found here. ... Scientific classification or biological classification is a method by which biologists group and categorize species of organisms. ... For other uses, see Animal (disambiguation). ... Typical Classes Subphylum Urochordata - Tunicates Ascidiacea Thaliacea Larvacea Subphylum Cephalochordata - Lancelets Subphylum Myxini - Hagfishes Subphylum Vertebrata - Vertebrates Petromyzontida - Lampreys Placodermi (extinct) Chondrichthyes - Cartilaginous fishes Acanthodii (extinct) Actinopterygii - Ray-finned fishes Actinistia - Coelacanths Dipnoi - Lungfishes Amphibia - Amphibians Reptilia - Reptiles Aves - Birds Mammalia - Mammals Chordates (phylum Chordata) include the vertebrates, together with... Subclasses & Infraclasses Subclass †Allotheria* Subclass Prototheria Subclass Theria Infraclass †Trituberculata Infraclass Metatheria Infraclass Eutheria Mammals (class Mammalia) are warm-blooded, vertebrate animals characterized by the production of milk in female mammary glands and by the presence of: hair, three middle ear bones used in hearing, and a neocortex region in... Orders[1] Magnorder Xenarthra: Cingulata (Armadillos) Pilosa (Sloths, True Anteaters) Magnorder Epitheria: Superorder Afrotheria: Afrosoricida (Tenrecs, etc. ... Suborders Mysticeti Odontoceti Archaeoceti (extinct) (see text for families) The order Cetacea (IPA: , L. cetus, whale) includes whales, dolphins and porpoises. ... Families See text The toothed whales (systematic name Odontoceti) form a suborder of the cetaceans. ... Genera See text Oceanic dolphins are the members of the Delphinidae family of cetaceans. ... This article does not cite any references or sources. ... Georges Cuvier Baron Georges Léopold Chrétien Frédéric Dagobert Cuvier (August 23, 1769–May 13, 1832) was a French naturalist and zoologist. ... For the overture by Tchaikovsky, see 1812 Overture; For the wars, see War of 1812 (USA - United Kingdom) or Patriotic War of 1812 (France - Russia) For the Siberia Airlines plane crashed over the Black Sea on October 4, 2001, see Siberia Airlines Flight 1812 1812 was a leap year starting... Download high resolution version (1357x628, 39 KB) , (C) User:Pcb21, 2004, User:Vardion 2003. ... The hierarchy of scientific classification. ... Genera See article below. ... For other uses, see Genus (disambiguation). ...

Taxonomy

Risso's Dolphin was first described by Cuvier in 1812. The species' common name is for Mr. Risso who described a specimen to Cuvier on which Cuvier made his first description. Another common name for Risso's Dolphin is the Grampus (also the species genus) - although as a common name was historically used to describe the Orca. The etymology of the word grampus is unclear. It may be an aglomeration of the Latin grandis piscis or French grand poisson both meaning big fish. The specific name griseus refers to the mottled (almost scarred) grey colour of the dolphin's body. Georges Cuvier Baron Georges Léopold Chrétien Frédéric Dagobert Cuvier (August 23, 1769–May 13, 1832) was a French naturalist and zoologist. ... Binomial name Orcinus orca Linnaeus, 1758 Orca range (in blue) The Orca or Killer Whale (Orcinus orca) is the largest species of the oceanic dolphin family (Delphinidae). ... Latin is an ancient Indo-European language originally spoken in Latium, the region immediately surrounding Rome. ...

Length is typically 10 feet (3 m), although animals have been recorded up to 12.5 feet (3.8 m). Like most dolphins, males are typically slightly larger than females. Weight averages about 650 pounds (300 kg), and large individuals may weigh up to 1100 pounds (500 kg).^[1]

Population and distribution

It is found worldwide in temperate and tropical waters, usually in deep waters rather than close to land. As well as the tropical parts of the Indian, Pacific and Atlantic Oceans, Rissos are also found in the Mediterranean and Red Seas, though are absent from the Black Sea. Their preferred environment is just off the continental shelf on steep banks (with water depths varying from 400-1000m) with water temperature at least 10° C and preferably in excess of 15° C. The Pacific Ocean (from the Latin name Mare Pacificum, peaceful sea, bestowed upon it by the Portuguese explorer Ferdinand Magellan) is the largest of the Earths oceanic subdivisions. ... Composite satellite image of the Mediterranean Sea. ... Location of the Red Sea The Red Sea is an inlet of the Indian Ocean between Africa and Asia. ... For other uses, see Black Sea (disambiguation). ...  Sediment  Rock  Mantle  The global continental shelf, highlighted in cyan The continental shelf is the extended perimeter of each continent, which is covered during interglacial periods such as the current epoch by relatively shallow seas (known as shelf seas) and gulfs. ...

The population around the continental shelf of the United States has been recorded to be in excess of 60,000. In the Pacific a census recorded 175,000 individuals in eastern tropical waters and 85,000 in the west. No global estimate of population exists.

Human interaction

Risso's Dolphins generally do not approach boats. A notable exception was an individual named Pelorus Jack who accompanied boats in Admiralty Bay in New Zealand's Marlborough Sound for more than 20 years. Whaling of this species has never been particularly widespread though operations off Sri Lanka may be significantly damaging the local population.^{[citation needed]} Globally the species is recognised as abundant and safe. Pelorus Jack (?-1912?) was a Rissos dolphin famous for following steamers in Cook Strait, New Zealand. ... A map of King George Island Admiralty Bay (62°10′ S 058°25′ W) is an irregular bay, 8 km wide at its entrance between Demay Point and Martins Head, indenting the southern coast of King George Island for 16 km in the South Shetland Islands. ... The crew of the oceanographic research vessel Princesse Alice, of Albert Grimaldi (later Prince Albert I of Monaco) pose while flensing a catch. ...

Risso's have been taken into capitivity successfully in the United States and Japan, though with nowhere near the regularity of Bottlenose Dolphins or Orca. Hybrid Risso's-Bottlenose Dolphins have been bred in captivity. Binomial name Montagu, 1821 Bottlenose Dolphin range (in blue) The Bottlenose Dolphin is the most common and well-known dolphin, recent molecular studies showing it is in fact two species, Common Bottlenose Dolphin (Tursiops truncatus), and Indo-Pacific Bottlenose Dolphin (). It inhabits warm and temperate seas worldwide and may be... Binomial name Orcinus orca Linnaeus, 1758 Orca range (in blue) The Orca or Killer Whale (Orcinus orca) is the largest species of the oceanic dolphin family (Delphinidae). ... // This article is about a biological term. ...

References

• Cetacean Specialist Group (1996). Grampus griseus. 2006 IUCN Red List of Threatened Species. IUCN 2006. Retrieved on 10 May 2006. Database entry includes justification for why this species is listed as data deficient
• National Audubon Society Guide to Marine Mammals of the World ISBN 0-375-41141-0
• Encyclopedia of Marine Mammals ISBN 0-12-551340-2
• Whales, Dolphins and Porpoises, Mark Carwardine, ISBN 0-7513-2781-6
• Grampus griseus (TSN 180457). Integrated Taxonomic Information System.
• Risso's Dolphin Photograph, Jens Kuhfs Photography

1. ^ American Cetacean Society Fact Sheet - Risso's Dolphin

The IUCN Red List of Threatened Species (also known as the IUCN Red List and Red Data List), created in 1963, is the worlds most comprehensive inventory of the global conservation status of plant and animal species and can be found here. ... The World Conservation Union or International Union for the Conservation of Nature and Natural Resources (IUCN) is an international organization dedicated to natural resource conservation. ... The Integrated Taxonomic Information System (ITIS) is a partnership designed to provide consistent and reliable information on the taxonomy of biological species. ...