A large compressed air system was used to artifically circulate Corbett Lake to prevent winter kill of rainbow trout. After 2 autumns of operation this line- release system was replaced with a much smaller compressor using a different means (point-release) of releasing air in the lake. The smaller system was tested in 3 different configurations and compared with the original unit.
Total oxygen content was greatly increased when the point-release circulator was operated without a 2 ft. diameter vertical pipe. Without the pipe the point-release system circulated the entire lake as well as did the line-release unit, was easier to install and less costly to operate.
Halsey, T. G., Galbraith, D. M.. 1971. Evaluation of Two Artificial Circulation Systems Used to Prevent Trout Winter-kill in Small Lakes. British Columbia Fish and Wildlife Branch. Fisheries Management Publication. 16
Topic: Fish and Fish Habitats
Keywords: British Columbia, winter kill, artificial circulation, methodology, evaluation, Corbett Lake, oxygen release, rainbow
Scientific Name: Oncorhynchus mykiss
English Name: Rainbow Trout
Other Identifier: FMP16
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