Use of a Portable Electric Barrier to Estimate Chinook Salmon Escapement in a Turbid Alaskan River

Autor:	Carl V. Burger, Aldo N. Palmisano
Rok vydání:	1988
Předmět:	Chinook wind geography geography.geographical_feature_category Ecology biology Management Monitoring Policy and Law Aquatic Science biology.organism_classification Fishery Tributary Oncorhynchus Fish Environmental science Ecology Evolution Behavior and Systematics Escapement
Zdroj:	North American Journal of Fisheries Management. 8:475-480
ISSN:	1548-8675 0275-5947
DOI:	10.1577/1548-8675(1988)008<0475:uoapeb>2.3.co;2
Popis:	We developed a portable electric barrier to aid in the capture of adult chinook salmon Oncorhynchus tshawytscha undergoing spawning migrations up a turbid stream in south-central Alaska. In 1981, we tagged and released 157 chinook salmon after diverting them from the main-stem Killey River into a conventional trap with the aid of the electric barrier. On the basis of returns of tagged salmon to Benjamin Creek, a clear-water tributary of the upper Killey River, we estimated spawners in the drainage to number 8,000 fish. Two different statistical approaches to the mark–recapture data yielded similar estimates. Through several modifications of the electric barrier, we were able to reduce mortality associated with the barrier's use.
Databáze:	OpenAIRE
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