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Changes in the lake trout population of southern Lake Superior in relation to the fishery, the sea lamprey, and stocking, 1950-70

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Changes in the lake trout population of southern Lake Superior in relation to the fishery, the sea lamprey, and stocking, 1950-70; 1975; Organization Series; Technical Report; 28; Pycha, Richard L.; King, George R.

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Commercial catch and effort statistics for 1929-70, samples of commercial catches in 1959-62, and records of examinations of all lake trout (Salvelinus namaycush) taken commercially in inshore waters of Michigan and Wisconsin in 1962-70 were the basis for descriptions of changes in the population in 1929-70. Abundance fluctuated cyclically and gradually downward in 1929-49, whereas fishing intensity tended to increase during the same period. In 1950-52, a change from cotton to nylon twine in gillnets raised effective fishing effort to 305% of the 1929-43 average in Michigan waters and to 228% in Wisconsin waters; production held near average. Abundance fell to 18% of average in Michigan in 1953-61 and to 25% of average in Wisconsin [...]

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Harvested on Mon Jul 21 11:40:15 MDT 2014 from MODS XML Service

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Type Scheme Key
local-index unknown 2000039
local-pk unknown 2000039
series unknown Technical Report

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journalTechnical Report
languageEnglish
citationTypeReport

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