Fish biologists say successful anti pollution efforts in some Canadian streamsmay have had the unwanted effect of increasing the population of invasive sea lamprey’s. The number of Lamprey that prey on valuable game fish like Lake trout have doubled in the western part of Lake Superior this year. Gil Halsted reports…
Stay informed on the latest news
Sign up for WPR’s email newsletter.
Wisconsin Public Radio, © Copyright 2025, Board of Regents of the University of Wisconsin System and Wisconsin Educational Communications Board.