Uploaded by edenalexanderjeyaker on Jan 10, 2011
Genesis 1.21 in the bible says,"And god created great whales"
Whales are the largest creatures currently living on earth today. There are different species of whales which include the blue whale, the humpback whale, the bowhead whale , the minke whale, sperm whale, killer whale, pilot whale, and beluga whale.
Whales are large, intelligent, aquatic mammals. They breathe air through blowhole(s) into lungs (unlike fish who breathe using gills). Whales have sleek, streamlined bodies that move easily through the water. They are the only mammals, other than manatees (seacows), that live their entire lives in the water, and the only mammals that have adapted to life in the open oceans.
Like all mammals:Whales breathe air into lungs, Whales have hair (although they have a lot less than land mammals, and have almost none as adults), Whales are warm-blooded (they maintain a high body temperature), Whales have mammary glands with which they nourish their young, Whales have a four-chambered heart. The biggest whale is the blue whale, which grows to be about 94 feet (29 m) long - the height of a 9-story building. These enormous animals eat about 4 tons of tiny krill each day, obtained by filter feeding through baleen. Adult blue whales have no predators except man. Killer whales and Shortfin Pilot whales are the fastest, swimming up to 30 miles per hour (48 kph). Many whales are very acrobatic, even breaching (jumping) high out of the water and then slapping the water as they come back down. Sometimes they twirl around while breaching. Breaching may be purely for play or may be used to loosen skin parasites or have some social meaning. Many whales are very acrobatic, even breaching (jumping) high out of the water and then slapping the water as they come back down. Sometimes they twirl around while breaching. Breaching may be purely for play or may be used to loosen skin parasites or have some social meaning. Gray whales make the longest seasonal migration of any of the whales. They travel about 12,500 miles each year give birth to live young which are nourished with milk from their mothers - they don't lay eggs. Cetaceans breed seasonally, usually in warm tropical waters, and females usually have one calf every 1-3 years. The gestation times range from 9-18 months. Whale calves can swim at or soon after birth. Mother whales care for their young for an extended period of time, usually at least a year, feeding them milk and protecting them. Complex whales songs can be heard for miles under the water. The humpback's song can last for 30 minutes. The songs are thought to be used in attracting mates, to keep track of offspring, and for the toothed whales, to locate prey. . For centuries, whales have been hunted for meat and as a source of raw materials. By the middle of the 20th century, however, industrial whaling had left many species seriously endangered, leading to the end of whaling in all but a few countries. It is said that,at its peak in 1846, 736 vessels and 70,000 people were involved in the American whaling industry. More than 2 million were taken in the early 20th century, and by the middle of the century, the whale population got severely depleted. The International Whaling Commission banned commercial whaling in 1986.] The ban is not absolute.
R.M. Nowak of Johns Hopkins University estimated that humpback whales may live as long as 77 years.In 2007, a 19th century lance fragment was found in a bowhead whale off Alaska, suggesting the individual could be between 115 and 130 years old.
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