Development of Thermally-Enhanced Walleye Aquaculture
1988-07-01
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Development of Thermally-Enhanced Walleye Aquaculture
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1988-07-01
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University of Minnesota Duluth
Type
Technical Report
Abstract
The culture of walleye in Minnesota can be enhanced by the
use of heated waters. Wild-caught walleye fingerlings were
maintained in the Aquaculture Research Facility at Minnesota
Power's Clay-Boswell Plant. These fingerlings were subsequently
induced to feed on a pelleted dry feed and to grow, increasing
their size 8.8 times. Fingerling mortality within the facility
after conversion to dry diet was minimal. Feed conversion (food
fed to body weight increase) ranged from 2.2 to 3.2 over the
project's duration.
Growth predictions from walleye bioenergetics models,
developed for each of the strains in the Aquaculture Research
Facility, were extremely close to actual growth in the facility
(within 2%). Because of the short duration of the project, it is
too early to assess the walleye model's ability to predict
mortality and food conversion efficiency. However, initial
inspection suggests that it may predict walleye mortality (after
fish have switched to dry diet) quite well, but does not predict
food conversion well at this point. The walleye bioenergetics
model appears to provide a means of detecting growth differences
in different strains of walleye, which could be extremely
valuable in choosing faster growing strains for future culture.
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A Final Report to Minnesota Power
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Natural Resources Research Institute, Center for Water and the Environment, University of Minnesota Duluth, 5013 Miller Trunk Hwy, Duluth, MN 55811
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McDonald, Michael E. (1988). Development of Thermally-Enhanced Walleye Aquaculture. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/189137.
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