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The Effect of Increasing the Stock in a Lake on the Size and Condition of Rainbow Trout
Author(s) -
Mottley C. McC.
Publication year - 1941
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1940)70[414:teoits]2.0.co;2
Subject(s) - rainbow trout , stocking , stock (firearms) , fishery , trout , zoology , fish <actinopterygii> , biology , body weight , environmental science , geography , archaeology , endocrinology
An investigation of the changes in length, weight and the length‐weight relationship of rainbow trout frown Paul Lake, British Columbia, is presented. As a result of the management policy adopted in 1931 the stock in the lake increased from 1932 to 1935; at the same time both the length and weight decreased significantly as evidenced by representative samples of yearling and 2‐year old fish. A valid method of comparing the length‐weight relationship is presented. The findings indicate that, although significant fluctuations occurred, and there was a significant decrease in the condition of the first fish planted when they reached 2 years of age, the factors involved require further study. A recommendation for modifying the stocking policy for depleted waters is given.