J.
Aquat.
Plant Manage.
37: 34-36 Vertebrates Removed by Mechanical Weed Harvesting in Lake Keesus, Wisconsin TRAVIS L.
BOOMS INTRODUCTION Mechanical weed harvesting has been used to control nuisance vegetation in Lake Keesus since 1979.
Fish, turtles,and amphibians often become entangled in the vegetation and are incidentally removed from the lake while harvesting weeds.
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Mechanical harvesting removed 2 to 8% of the standing crop of juvenile fish in harvested areas in Saratoga Lake,New York (Mikol 1985) and 32% of the fish population in harvested areas in Orange Lake, Florida, representing an estimated replacement value of $6,000 per ha (Haller et al.
1980).
Engel (1990) found mechanical harvesting removed 21,000 to 31,000 fish per year from Lake Halverson, Wisconsin, representing 25% of the fry in the lake.
Little other current information has been published concerning aquatic vertebrate removal by mechanical weed harvesting in Wisconsin.
http://www.apms.org/japm/vol37/v37p34.pdf