Forecasting Contributions of Lake Whitefish Year-Classes to a Lake Superior Commercial Fishery from Estimates of Yearling Abundance
- 1 May 1993
- journal article
- Published by Oxford University Press (OUP) in North American Journal of Fisheries Management
- Vol. 13 (2) , 349-352
- https://doi.org/10.1577/1548-8675(1993)013<0349:fcolwy>2.3.co;2
Abstract
We developed a simple linear regression model to forecast year-class contributions of lake whitefish Coregonus clupeaformis to the commercial harvest in the Apostle Islands region of Lake Superior. We indexed year-class strength from catches of yearling fish in bottom trawl samples. Recruitment of each year-class was measured by its relative abundance in the fishery at age 6. The relation between recruitment to the commercial fishery and year-class strength indices was positive and significant (r 2 = 0.67, P < 0.01). The model produced reliable estimates of recruitment to the fishery within the range of the regression. Projected recruitment of the 1983–1987 year-classes to the fishery in 1989-1993 should be sufficient to sustain current levels of harvest through 1993.Keywords
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