Federal service plans lamprey treatment in northern WisconsinU.S. Fish and Wildlife Service personnel will apply lampricides to the Cranberry, Iron and Middle rivers in Douglas, Bayfield and Iron counties to kill sea lamprey larvae burrowed in the stream bottom.
U.S. Fish and Wildlife Service personnel will apply lampricides to the Cranberry, Iron and Middle rivers in Douglas, Bayfield and Iron counties to kill sea lamprey larvae burrowed in the stream bottom.
Applications will be conducted on or about July 16-25 in accordance with state permits.
Application will be complete in about six days and dates may changed based upon local weather or stream conditions near the time of treatment.
Sea lamprey larvae live in certain Great Lakes tributaries and transform to parasitic adults that migrate to the Great Lakes and kill fish. Failure to kill the larvae in streams would result in significant damage to the Great Lakes fishery. Infested tributaries must be treated every three to five years with lampricides to control sea lamprey populations.
The U.S. Environmental Protection Agency and Health Canada Pest Management Regulatory Agency have reviewed human health and environmental safety data for lampricides, and in 2003, concluded lampricides (Lampricid and Bayluscide) pose no unreasonable risk to the general population and the environment when applied at concentrations necessary to control larval sea lamprey. However, as with any pesticide, the public is advised to use discretion and minimize unnecessary exposure.
Lampricides are selectively toxic to sea lampreys, but a few fish, insect and broadleaf plants are sensitive. Persons confining bait fish or other organisms in stream water are advised to use an alternate water source because lampricides may cause mortality among aquatic organisms stressed by crowding and handling. Agricultural irrigation must be suspended for 24 hours, during and following treatment.