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Natural History Of The Lamprey - Online Papers

Natural History Of The Lamprey

Lamprey is a common name for about forty species of jawless, eel-like fishes. They are very smooth skinned and scaleless. Some can grow up to three feet in length, usually only in the oceans. All lampreys are dull colored, ranging from light-tan to molted-brown or bluish-black. Scientist consider the lamprey to be one of the least developed vertebrates. The lamprey has no bony skeleton. It only has a backbone like notochord that is made of cartilage. The lamprey only has fins at the top of it. On each side of the body is a row of seven respiratory openings through which the lamprey breathes.
Adult forms of lampreys live on the blood of fishes and can sometimes cause serious ...

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and subartic regions throughout the world, except for Southern Africa. The sea lamprey is a marine species. They are native to the Atlantic Coast of North America and Europe. In many areas it has adapted to a life cycle spent entirely in freshwater. The sea lamprey invaded Lake Erie in the 1920’s, where its warm water was good for reproduction. They migrated to Lake Huron in 1939 and then to Lake Michigan. Within a few years, the lamprey had severely damaged the valuable trout fish in these lakes. They were competing with the fishing industry for the available trout. After invading Lake Superior, the lamprey became a serious threat to the fishing industry there. As a result, in September of 1954, the United States and Canada signed an agreement for joint action against the lamprey. The most effective method of control was the electromechanical weir. This was where adult lamprey would get electrocuted as they swam upstream to go spawn. They also used selective chemicals ...

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Natural History Of The Lamprey. (2008, March 19). Retrieved November 23, 2024, from http://www.essayworld.com/essays/Natural-History-Of-The-Lamprey/80805

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PAPER DETAILS

Added: 3/19/2008 11:18:02 PM
Category: Science & Nature
Type: Free Paper
Words: 1160
Pages: 5

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