Anglers catching fish in zebra mussel-infested lakes may be reeling in adult walleyes with mercury content 72 percent higher and perch with 157 percent higher levels than those being caught on non-infested lakes.
In a just-released report, researchers studied 21 Minnesota lakes, 12 containing zebra mussels and nine without. The study reports that zebra mussels alter a lake’s makeup in several ways.…