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Dolphins - College Paper

Dolphins


are beautiful and intelligent craters that have attracted the attention of people for thousands of years. The animals appeared in Greek and roman mythology and it is said that the ancient Greeks considered the common dolphin sacred to the god Apollo. For centuries, sailors have regarded the presence of near ships as a sing that they will have a smooth voyage. (Grolier 1996)
are actually a coned of small-toothed whale. They are mammals in the order cetacean (cetacean is a collective term for whales, and porpoises. Like all other mammals, have lungs. The animals must surface regularly to breathe air, usually once or twice a minute. When at the surface the dolphin breathes through a ...

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dolphin species have a distinct beck where as porpoises have a more rounded shape to there head. They also have a hooked-shaped dorsal fin not fend in other specious, as will as conical teeth.
Erans explains that evolved from the Mesonychicsi, large land mammals and the earliest recognizable cetaceans lived about 50 million year ago. The earliest did not appear install the late mioceene period, Some 11 million years ago. Evans also the land animal that is new the closest to is hooted animals called Ungulates. (27)

Dolphins can be fanned in almost every sea and ocean. Each species however has its own preferred type of habitat. Some live in only cold water, others are fanned only in tropical oceans. There is also a number of dolphin species that inhabit fresh water. These dolphins belong to the river dolphin families, like the baigi and Lndus river dolphins. However the salt-water species don’t do well in fresh water, do to the fact that they have less buoyancy in fresh ...

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PAPER DETAILS
Added: 3/29/2004 09:58:18 PM
Category: Science & Nature
Type: Free Paper
Words: 505
Pages: 2

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