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The Big Blue Whale An Endangered Species (Balaenoptera Musculus) By Nadia Berardelli
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The Body Descritption How Whales Live Habitat Having Babies Noises Cause of Decline Research and Recovery
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Description The blue whale is the biggest creature that has ever lived on earth. They can grow to 100 feet long and weigh 150 tons. The whales are mottled bluish-gray on their backs and sides. Female blue whales are a little bigger than the males.
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The Body n They have hundreds of baleen plates, instead of teeth in their mouth. n It has as many as 88 folds of skin in its throat. n The skin is springy and smooth.
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How The Whale Lives è Feed on krill and may consume several tons each day è Use their sense of hearing and their sense of touch to find their way around. è It is a mammal and breathes air, not water. è They can live for about 70 to 80 years
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Habitat Z Whales migrate long distances between equatorial wintering grounds and high latitude feeding areas. Z In summer they may be found across the Gulf of Alaska and in winter, off southern California Z Spend most their time along the edges of continental shelves.
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Having Babies ] Male and female whales mate in winter and then part. ] Babies are born about a year later. ] A baby whale is 23 feet long at birth. ] They drink more than 150 gallons of milk a day.
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Noises l You can hear a whale’s blow, when it comes to the water surface for air. l They communicate through a very low hum which can travel for thousands of miles through the seas.
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Causes Of Decline Y Estimated 4,900 to 6,000 blue whales inhabited the northern Pacific Ocean prior to whaling. Y Between 1910 and 1966 ~ 8,200 were killed in the North Pacific, severely reducing the population. Y The world population is estimated at 8,000 to 12,000.
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Research and Recovery Y Blue whales are protected by several U.S. and international treaties and agencies. Y Whale sightings have increased since the end of whaling. Y Despite 50 years of protection, the population has not recovered.
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Credits Information and Pictures n http://mbgnet.mobot.org/salt/whale/blue.htm n http://www.zoomwhales.com/subjects/whales/ species/bluewhale/Loudest.shtml n http://www.rorqual.com/blue.htm n http://www.acsonline.org/factpack/bluewhl.htm n http://www.earthwindow.com/blue.html
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