genus orcinus characteristics

On the other hand, killer whales can communicate through various sounds that other orcas in the pod recognize even though they are several kilometers away.
Other food sources are squids, sea lions, penguins, whales, and porpoises.

In the Southern Hemisphere killer whales can be seen off the coasts of Argentina, South Africa, New Zealand, and the Galapagos Islands. In general, these pods have 20 percent of mature males, 20 percent of offspring and 60 percent of females and young males. Skin Coloration. It is a huge and bulky cetacean that has a shape similar to the other dolphin species. Although it is commonly named “killer whale,” environmentalist are trying to change this name because there are two inaccuracies in it: it is not a whale, and much less a killer. William F. Perrin, Bernd Würsig, J.G.M. They live, reproduce and feed in pods of up to 40 or 50 members forming temporal superpods with more members sometimes. They have several hunting strategies depending on the type of prey and the region they inhabit. Killer whales even prey on baleen whales or dolphins. Genus: Orcinus. When orcas consume small prey, they swallow it completely, but they have to split the large ones into smaller pieces before ingesting them, which usually do it by shaking the victim violently. In the North Pacific several populations live along the Alaskan coast, in the intracoastal waterways of British Columbia and Washington, and off the coast of Baja California. Evidence suggests that O. orca is in the process of diverging into two species in the North Atlantic. Order: Cetacea The evolutionary record of the genus Orcinus is scanty. It is the largest mammal predator and feeds on a wide variety of large or small animals. Flipper length among females is 11–13 percent of body length. Killer whales were formerly referred to as grampuses, but that term is now a synonym for Risso’s dolphin. This article was most recently revised and updated by, killer whale - Children's Encyclopedia (Ages 8-11), killer whale - Student Encyclopedia (Ages 11 and up). (Orcinus Orca) INFORMATION AND CHARACTERISTICS. Orcas exhibit sexual dimorphism since males are larger than females. * But the population of some regions is in danger of extinction. Distinctive features.

Although the taxonomy of the killer whale is clear at the genus level and at the family level (Delphinidae), relationships between killer whales and other toothed whales (suborder Odontoceti) are ambiguous. They have long, slender legs with a single toe - protected by a hoof. Noun 1. genus Acipenser - type genus of the Acipenseridae: sturgeons Acipenser fish genus - any of various genus of … Its dorsal fin is also large: in males can measure up to 1.8 meters while that of females reaches between 70 and 80 centimeters and is more curved. It is the largest mammal predator and feeds on a wide variety of large or small species, warm-blooded or cold-blooded, whether dangerous or not. Killer whales are also one of the small number of species—along with human beings (Homo sapiens), short-finned pilot whales (Globicephala macrorhynchus), false killer whales (Pseudorca crassidens), belugas (Delphinapterus leucas), and narwhals (Monodon monoceros)—that experience menopause (that is, the stoppage of ovulation prior to the end of their natural lives). The dorsal area is black but changes to white from the lower jaw passing through all the ventral part up to the anus. Baird RW(1)(2), Abrams PA(3), Dill LM(1). After humans, killer whales are the most distributed mammals on the Earth.
The earliest fossil identified as a killer whale is O. citonensis from the Pliocene Epoch (5.3 million to 2.6 million years ago) in Italy.

Possible indirect interactions between transient and resident killer whales: implications for the evolution of foraging specializations in the genus Orcinus. Resident pods and transient pods have been differentiated within the populations of British Columbia and Washington. For this reason, CITES (Convention on International Trade in Endangered Species of Wild Fauna and Flora) has included the species in Appendix II of the species whose trade is controlled. Author information: (1)Behavioural Ecology Research Group, Department of Biological Sciences, Simon Fraser University, V5A 1S6, Burnaby, B.C., Canada. Orcas do not discriminate. Define genus Acipenser. Adult males tend to have dorsal fins that are triangular or that may even cant forward to varying degrees. by Dolphins-World | Apr 26, 2017 | Species |. The Latin name Orcinus translates as "belonging to Orcus". For centuries, orcas have frequently been hunted for oil and meat. Page 650.

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