A History and Evaluation of Regulations for Brook Trout and Brown Trout in Michigan Streams

Autor:	Gaylord R. Alexander, Howard Gowing, Richard D. Clark
Rok vydání:	1981
Předmět:	Ecology biology Fishing STREAMS Management Monitoring Policy and Law Aquatic Science biology.organism_classification Fishery Trout Brown trout Fontinalis Salmo Ecology Evolution Behavior and Systematics Salvelinus Catch and release
Zdroj:	North American Journal of Fisheries Management. 1:1-14
ISSN:	1548-8675 0275-5947
DOI:	10.1577/1548-8659(1981)1<1:ahaeor>2.0.co;2
Popis:	Since establishment of the Board of Fish Commissioners in 1873, the trend in Michigan trout fishing regulations has been toward more restrictive and complex laws. Major scientific investigations concerning the effectiveness of various types of regulations began in 1945. Those studies indicated that a minimum size limit was the most effective regulation for controlling exploitation of trout. In this study, minimum size limits for brook trout (Salvelinus fontinalis) and brown trout (Salmo trutta) in Michigan streams were evaluated through mathematical modeling. Minimum size limits ranging from 152 to 229 mm were tested for brook trout and from 152 to 305 mm for brown trout. Catch-and-release (no-kill) regulations were also simulated for both species. Maximum yield in numbers and weight of trout harvested (legal-size fish killed) was obtained at a 152-mm minimum limit for both species. Yield in numbers and weight of trout caught and released (sublegal fish returned to water alive) increased as size ...
Databáze:	OpenAIRE
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