Downstream Movement of Rainbow Trout Fry in a Tributary Sagehen Creek, under Permanent and Intermittent Flow

Autor:	Don C. Erman, George R. Leidy
Rok vydání:	1975
Předmět:	Fishery geography geography.geographical_feature_category Downstream (manufacturing) Tributary Environmental science Fish Rainbow trout Aquatic Science Nocturnal Diel vertical migration Ecology Evolution Behavior and Systematics Water level
Zdroj:	Transactions of the American Fisheries Society. 104:467-473
ISSN:	1548-8659 0002-8487
DOI:	10.1577/1548-8659(1975)104<467:dmortf>2.0.co;2
Popis:	Rainbow trout fry spawned in an intermittent stream had a diel periodicity in downstream movement that was highly correlated with discharge. Shortly after fry emerged in mid-July 1973, Kiln Meadow Tributary of Sagehen Creek began to dry up and fry began to move downstream, primarily during the day. After rains, when the water level remained high (5 to 8 liters/s) without diel fluctuations, few fry were captured in the trap. In 1974 the tributary was permanent and fry exhibited a nocturnal downstream emigration. Many fry remained in the tributary where they were almost the only fish occupants.
Databáze:	OpenAIRE
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