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Environment & Climate Change

Taking aim at the fish-eating sea lamprey

Sea lamprey
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Beginning on Sept. 9, the U.S. Fish and Wildlife Service will start to apply lamprey-killing pesticides into the Muskegon River.

The sea lamprey is a blood-sucking eel-like invasive species living in the Great Lakes. The fish is native to the north Atlantic ocean and got into the Great Lakes around 1920. The numbers proliferated since then.

Michael Twohey is a fish biologist with the U.S. Fish & Wildlife Service. He says that the lamprey is devastating to the native fish population.

“They are very efficient fish-eating machines. Each one consumes about 40 pounds of lake trout in its lifetime," says Twohey.

That's why the sea lamprey killing is planned for the Muskegon River system, using a chemical called TFM. Twohey says it's remarkably benign to most other creatures. The chemical will kill the sea lamprey larvae and largely leave everything else intact.

"We just can't have a sustainable fishery without sea lamprey control programs," says Twohey.

*Listen to the interview with Michael Twohey above. 

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