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Seaward migrating subyearling chinook salmon avoid overhead cover
Author(s) -
Kemp P. S.,
Gessel M. H.,
Williams J. G.
Publication year - 2005
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.0022-1112.2005.00833.x
Subject(s) - chinook wind , oncorhynchus , culvert , biology , riparian zone , flume , fishery , predation , channel (broadcasting) , cover (algebra) , habitat , fish <actinopterygii> , ecology , engineering , flow (mathematics) , mechanical engineering , electrical engineering , structural engineering , geometry , mathematics
Approximately three‐quarters of migrating autumn (fall) chinook salmon Oncorhynchus tshawytscha smolts avoided a covered channel and selected an uncovered channel when presented with a choice in an experimental flume. Rejection of overhead cover occurred prior to, but was rare post‐channel entrance. Smolts may selectively reject riparian cover as an adaptive behavioural response to minimize predation risk and enhance rates of migration. The findings have implications for fish bypass design and riparian habitat and culvert restoration.