Movement and Survival of Presmolt Steelhead in a Tributary and the Main Stem of a Washington River

Autor:	John J. Loch, Steven A. Leider, Mark W. Chilcote
Rok vydání:	1986
Předmět:	geography geography.geographical_feature_category Ecology biology Management Monitoring Policy and Law Aquatic Science biology.organism_classification Fishery Tributary Juvenile Salmo Ecology Evolution Behavior and Systematics Main stem
Zdroj:	North American Journal of Fisheries Management. 6:526-531
ISSN:	1548-8675 0275-5947
DOI:	10.1577/1548-8659(1986)6<526:masops>2.0.co;2
Popis:	Presmolt steelhead (Salmo gairdneri) were marked in Gobar Creek from 1981 to 1984 and movements between this creek and the main stem of the Kalama River in Washington were examined. Some of these migratory parr travelled a considerable distance down the river, whereas others remained in the tributary. We found that migrant parr were capable of surviving to the smolt stage. Most migrant parr remained in downstream areas prior to smolting, with few returning upstream and emigrating as smolts from Gobar Creek. Of all juvenile steelhead from Gobar Creek that survived to become smolts, most emigrated from the creek to downstream areas as parr and subsequently outmigrated from these downstream areas the following year. The freshwater survival of a majority of the steelhead spawned in tributaries may depend largely on the availability of suitable rearing environments in downriver areas.
Databáze:	OpenAIRE
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