(Mann, et al., 2000; Matthews, 1978). It is thus proposed that the acrobatic locomotion of cetaceans, combined with their limited ability to isolate the head from body movements, results in substantially increased rotations perceived by their semicircular canal system compared with terrestrial mammals of similar body size. Academic Press, 2009. They also eat penguins, seals, octopuses and sea turtles. Figure 3. Killer Whale Predation on Sea Otters Linking Oceanic and Nearshore Ecosystems. Orcas exhibit sexual dimorphism since males are larger than females. Life expectancy: females on average 50 years, maximum 80-90 years (record 103 years); males average 29 years old, maximum 50-60 years old (record 59 years). Individuals in pods swim within 100 meters of each other and coordinate their activities. In captivity, killer whales live shorter – usually up to 25 years, a few lived to 30 years, and a few 40 years. Whales. (Chadwick, 2001; Murata, et al., 2004; Estes, et al., 1998; Heyning and Dahlheim, 1988; Mann, et al., 2000), Killer whales are hunted and used for a number of things. Orcinus orca is found living in all oceans of the world. Orcas, or killer whales, are the largest of the dolphins and one of the world's most powerful predators. Orcinus orca is found living in all oceans of the world. When a killer whale calf is born into a pod, it relies on its mother for nutrition and support. 2. Estes, J., M. Tinker, T. Williams, D. Doak. The process by which an animal locates itself with respect to other animals and objects by emitting sound waves and sensing the pattern of the reflected sound waves. They have several hunting strategies depending on the type of prey and the region they inhabit. Overfishing is directly linked to human activities, and in Estes et al. helpers provide assistance in raising young that are not their own. * But the population of some regions is in danger of extinction. having body symmetry such that the animal can be divided in one plane into two mirror-image halves. Information and translations of GENUS ORCINUS in the most comprehensive dictionary definitions resource on the web. Killer whales are host to some endoparasites and ectoparasites. Help us improve the site by taking our survey. They have a characteristic black and white coloration, which makes them difficult to confuse with other species. This could cause the polar bear to contest the role of the top predator of the Arctic and also pose a potential threat to it, since the bears have to stay in the water for a long time if the ice surface disappears. Species of Diphyllobothrium reported from humans. They often hunt in groups – then they can successfully attack the whales, trying to tear out their … tongue.

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