Strategy for the Use of Lake Trout Strains in Lake Michigan

February 28, 1983 - Charles C. Krueger; Ross M. Horrall; Henn Gruenthal

Journal or Book Title: Fish Management Bureau - Administrative Report No. 17

Volume/Issue: 17

Year Published: 1983

The stocking of hatchery lake trout has been a primary management tool since 1965 to reestablish populations in Lake Michigan. The lack of significant natural reproduction has been attributed to a variety of causes including the loss or lack of adaptive traits for surviving in the wild. We believe that the genetic characteristics of hatchery trout used for future stocking in Lake Michigan can be enhanced by using genetic variability that is preadapted for survival in the wild and by conserving this genetic variability with hatchery procedures. Based on this theory, several lake trout strains are recommended for hatchery production, and a strategy is proposed for stocking Lake Michigan.

The Gull Island Shoal, Wyoming (Lewis and Jenny Lake), Seneca Lake, and Lake Michigan-Green Lake strains are recommended for initial emphasis in the Lake Michigan stocking program. These wild and semi-wildstrains should be compared against Domestic (Superior) strain trout in tenns of survival and reproduction in Lake Michigan. Transfers of adult lake trout from Lake Superior wild populations are also proposed for the Lake Michigan stocking program. Each strain is identified as to its suitability for stocking on shallow and deep water reefs. In the final period of the strategy, lake trout for stocking will be produced from gametes collected directly from wild Lake Michigan. Populations that should have developed from the stocking of one or more of the strains listed.

 

Type of Publication: Paper/Poster Presentations

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