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Growth of lake trout in Lake Superior before the maximum abundance of sea lampreys

Transactions of the American Fisheries Society

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Abstract

The growth in length of lake trout (Salvelinus namaycush) from the inshore water of Lake Superior in 1953 increased with age from the 3rd to 9th year, and was nearly constant from the 9th to the 12th year. Growth was greatest in the 1st year (4.0 inches) and least in the 2nd and 3rd years (2.3 inches). Between the 4th and 9th years the increments increased from 2.6 to 3.5 inches. Growth was calculated from a curvilinear body-scale relation. Intraseasonal growth in length extended from late April until well after October; most growth was in late summer and fall. The younger fish started growth earlier, and some mature fish did not increase in length until after the October spawning. Lake trout reached the minimum legal weight (1.5 pounds) in the 7th year of life and the average size taken in the commercial fishery (about 3 pounds) in the 8th year. The annual increase in weight in the 8th year of life was over 64%. Fish used in this study grew more slowly than those from Lakes Michigan and Huron taken during the period when sea lamprey abundance was increasing, but at about the same rate as lake trout of Lake Michigan before the sea lamprey appeared.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Growth of lake trout in Lake Superior before the maximum abundance of sea lampreys
Series title:
Transactions of the American Fisheries Society
Volume
96
Issue:
3
Year Published:
1967
Language:
English
Contributing office(s):
Great Lakes Science Center
Description:
p. 268-277
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Transactions of the American Fisheries Society
First page:
268
Last page:
277