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Orca

Endangered Animal:Killer Whale - Orcinus orca
by

gracieli lisboa

on 20 April 2010

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Transcript of Orca

Endangered Animal: Killer Whale - Orcinus orca It is the largest animal of the dolphins' family, as males grow to 23 feet and weigh 7 to 10 tons, and females average 21 feet long and weigh 4 to 6 tons. Habitat
Orcas are found mainly in the Artic and Antartic and west coast of the United States and Canada, and their habitat consists of both coastal water and open ocean. Food
Orcas eat fish, birds and marine mammals, and normally work together to catch a meal, forcing fishes into one aerea, and taking turns to feed.
Threats
Orcas are the most contaminated marine animals in the world. And pollution and chemical contamination can cause them diseases and difficulty of gestation. Hunting has significantly reduced their number. Captivity
Orcas in captivity often develop pathologies and have vastly reduced life expectancies. They are constantly under stress and, therefore, may become agressive. Critics say orcas are too big and intelligent to be be suitable for captivity, as wild whales travel 100 m each day. They live 30 to 50 years in the wild. Gestation takes 13 to 16 months, and the babies are born in the autumn, weighing 400 pounds. They stay with their mothers for 2 years. Behavior
Orcas are social animals who travel in average groups of 5 to 30 whales, called pods. These pods are led by males, which means orcas establish social hierarchies. It is believed that they develop complex means of communication, and different dialects for each pod.
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