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Effect of stocking season and technique on survival of lake trout in Lake Ontario

North American Journal of Fisheries Management

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Abstract

To identify the stocking season and technique that resulted in maximum contribution of hatchery-reared lake trout (Salvelinus namaycush) to the population in Lake Ontario, paired lots of yearlings were stocked near shore in March, near shore in May, and offshore by helicopter in May. All mortality associated with stocking season and technique apparently had occurred by age 2. Therefore, survival comparisons were based on combined recoveries of age-2 and older fish. We found statistically significant differences in survival ratios for 19 of 30 comparisons among individual paired lots, but results were not consistent. Variables other than stocking date and technique apparently had a major influence on survival of lake trout following stocking in Lake Ontario. Predation by large salmonids may have been the the dominant mechanism affecting survival.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Effect of stocking season and technique on survival of lake trout in Lake Ontario
Series title:
North American Journal of Fisheries Management
Volume
12
Issue:
1
Year Published:
1992
Language:
English
Contributing office(s):
Great Lakes Science Center
Description:
p. 131-138
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
North American Journal of Fisheries Management
First page:
131
Last page:
138
Number of Pages:
7