MIBowhunter
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Manistique River Treated with Chemical to Kill Lamprey
Marquette, Mich. — U.S. Fish and Wildlife Service technicians and biologists recently treated the upper tributaries of the Manistique River in Schoolcraft County to kill larval-stage sea lampreys.
Sea lampreys, in their larval stage, live in the bottom sediments of Great Lakes tributaries.
The chemical used in the treatments, TFM, is applied under a state permit and meets Michigan’s water quality criteria, the Forest Service said.
Lamprey larvae hatch from eggs laid by adults in gravel nests and drift to silty bottom areas, where they burrow and live for several years. During that stage of life, they are vulnerable to TFM treatments.
Failure to eliminate larvae in streams allows the lamprey to transform into parasitic adults, which travel to the Great Lakes and kill fish, including lake trout.
Tributaries are treated every three to five years to try to eliminate sea lamprey populations.
Marquette, Mich. — U.S. Fish and Wildlife Service technicians and biologists recently treated the upper tributaries of the Manistique River in Schoolcraft County to kill larval-stage sea lampreys.
Sea lampreys, in their larval stage, live in the bottom sediments of Great Lakes tributaries.
The chemical used in the treatments, TFM, is applied under a state permit and meets Michigan’s water quality criteria, the Forest Service said.
Lamprey larvae hatch from eggs laid by adults in gravel nests and drift to silty bottom areas, where they burrow and live for several years. During that stage of life, they are vulnerable to TFM treatments.
Failure to eliminate larvae in streams allows the lamprey to transform into parasitic adults, which travel to the Great Lakes and kill fish, including lake trout.
Tributaries are treated every three to five years to try to eliminate sea lamprey populations.
