Great Lakes Fishery Commission.
The Great Lakes Fishery Commission today reported that populations of the invasive, parasitic sea lamprey remain at near-historic lows, below targets, in Lakes Michigan and Ontario, and above target, but holding steady, in Lakes Huron, Superior and Erie. Sea lamprey populations in Lake Huron are close to target levels and have been holding steady for the past five years. Abundances in Lakes Superior and Erie remain above target but have also decreased significantly since the near-record highs observed in 2017. Sea lampreys are the worst of the alien species to invade the Great Lakes. Before control, sea lampreys destroyed many times the human fish catch. Today, sea lamprey control is the foundation of the $7 billion Great Lakes fishery. The Commission and its partners are encouraged by the overall decrease in abundance of sea lampreys throughout the Great Lakes basin during 2019, but caution that environmental conditions, such as a prolonged spring and high precipitation events, contributed to the decrease.
Distribution / Maps / Survey Status
The section below contains highly relevant resources for this species, organized by source. Or, to display all related content view all resources for Sea Lamprey.
Council or Task Force
Ontario's Invading Species Awareness Program (Canada).
State and Local Government
New York Department of Environmental Conservation.
Ohio Department of Natural Resources.
Minnesota Department of Natural Resources.
Wisconsin Department of Natural Resources.
Pennsylvania State University. Pennsylvania Sea Grant.
See also: Aquatic Invasive Species: Resources for additional species information
Michigan State University. Extension.
See also: Sea Lamprey Control in the Great Lakes