By KEVIN DUFFY
Capital News Service
LANSING — For the first time, researchers have combined the smell of death with the lure of sex to better target a parasitic invader that has feasted on Great Lakes fish for decades. Their target is the sea lamprey, an invasive species that uses its toothy sucker-like mouth to feast on Great Lakes trout, salmon, sturgeon, walleye and whitefish. Before lamprey were managed, they cost the Great Lakes 110 million fish annually. The cost of control is about $20 million a year, saving about 100 million fish annually, said Marc Gaden of the Great Lakes Fishery Commission, the agency responsible for managing the sea lamprey. Control today is primarily with a selective pesticide that’s dumped into rivers and streams to kill them.