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INVASIVES DESTROYING GREAT LAKES FOOD CHAIN

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Biologists sorting fish. The populations of smaller fish that game fish eat have collapsed in Lake Huron. (Photo courtesy of MI DNR)

Although zebra mussels have been affecting the ecology of the Great Lakes since they were first found in 1988, researchers are continuously surprised at how much damage they've caused. Now, biologists are wondering if zebra mussels and the more recently arrived quagga mussels are to blame for a collapse of the fishery in one of North America's largest lakes. Lester Graham reports the researchers are also wondering if this collapse is a preview of what will happen to all of the Great Lakes:

Great Lakes Sport Fishing Council's invasive species page

EPA report on the Great Lakes food web

The Alpena Fisheries Research Station

Producer: Lester Graham
Release Date: November 13, 2006
Running Time: 4:21

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