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Underwater cannon may help protect Great Lakes
In battle against invasive fish, scientists turn to new weapon, a noisy underwater cannon
By The Associated Press

TRAVERSE CITY, Mich. (AP) ' Scientists want to know if an underwater cannon can protect valuable Great Lakes fish from a greedy predator.

The round goby (GOH'-bee) is an exotic species that hangs around spawning beds, gobbling up eggs of native varieties such as lake trout and whitefish that are important to the fishing industry.

Biologists plan to use a seismic gun to chase gobies from several Lake Michigan reefs that are popular spawning areas. The experiment is to begin next fall.



Researchers hope the shell-shocked gobies will stay away long enough for native fish eggs to hatch and escape.

It's part of the increasingly sophisticated war against invasive animals and plants that cost the nation's economy billions of dollars each year. The Great Lakes in particular are besieged by at least 185 aquatic invaders.


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