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Longevity of Lake Superior lake trout

North American Journal of Fisheries Management

By:
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Abstract

The age structure of mature lake trout Salvelinus namaycush from the Wisconsin waters of Lake Superior increased following a population recovery that has taken place since the 1960s. As the population aged, it became apparent that scales were unreliable aging structures. Beginning in 1986, we examined both scale and sagittal otolith ages from tagged fish with a known period at liberty. We found large discrepancies in scale and sagittal otolith ages of mature fish, such that scale ages were biased low. We estimated lake trout living up to 42 years, which is greater than previously reported from Lake Superior. Investigators studying lake trout population dynamics in the Great Lakes should be aware that lake trout can live longer than previously thought.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Longevity of Lake Superior lake trout
Series title:
North American Journal of Fisheries Management
Volume
18
Issue:
3
Year Published:
1998
Language:
English
Contributing office(s):
Great Lakes Science Center
Description:
p. 700-703
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
North American Journal of Fisheries Management
First page:
700
Last page:
703
Number of Pages:
3