Smelly Traps for Lampreys

Researchers tap into a sea lamprey's sense of smell to keep these fish under control.

By Emily Sohn, 00:00 AM November 10, 2005

Sea lampreys might be nobody's best friend. The snakelike fish are parasites. They latch onto other fish and suck their blood. Sea lampreys are also invaders. About a century ago, they arrived in the Great Lakes. By the 1940s, they had nearly wiped out many populations of native fish.

Since then, the Great Lakes Fishery Commission has spent many millions of dollars on attempts to control lampreys in the Great Lakes. The fish are a hearty bunch. Now, scientists from the University of Minneso...

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