Longevity of Lake Superior lake trout
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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.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Longevity of Lake Superior lake trout |
| Series title | North American Journal of Fisheries Management |
| DOI | 10.1577/1548-8675(1998)018<0700:LOLSLT>2.0.CO;2 |
| Volume | 18 |
| Issue | 3 |
| Year Published | 1998 |
| Language | English |
| Publisher | Taylor & Francis |
| Contributing office(s) | Great Lakes Science Center |
| Description | 4 p. |
| First page | 700 |
| Last page | 703 |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |
| Google Analytic Metrics | Metrics page |