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Downstream Movement of Rainbow Trout Fry in a Tributary Sagehen Creek, under Permanent and Intermittent Flow
Author(s) -
Erman Don C.,
Leidy George R.
Publication year - 1975
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1975)104<467:dmortf>2.0.co;2
Subject(s) - tributary , rainbow trout , diel vertical migration , fishery , environmental science , downstream (manufacturing) , fish <actinopterygii> , hydrology (agriculture) , geography , biology , geology , operations management , cartography , geotechnical engineering , economics
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.