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Downstream migration of recently transformed sea lampreys before and after treatment of a Lake Michigan tributary with a lampricide

January 1, 1972

After the Pere Marquette River was treated with a lampricide in May 1964, the number of recently transformed sea lampreys (Petromyzon marinus) collected in the water-intake structure of a chemical plant near the mouth of the stream dropped 99.5%, from 13,913 (average for 1962-63 and 1963-64) to 76 (average for the next four migration seasons). Average length of the lampreys caught increased markedly after the treatment. In five of the six migration seasons, the catch of downstream migrants was higher in the fall than in the spring.

Publication Year 1972
Title Downstream migration of recently transformed sea lampreys before and after treatment of a Lake Michigan tributary with a lampricide
Authors John W. Hodges
Publication Type Article
Publication Subtype Journal Article
Series Title Journal of the Fisheries Research Board of Canada
Index ID 1000187
Record Source USGS Publications Warehouse
USGS Organization Great Lakes Science Center
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