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The Design and Operation of a Trap for the Capture of Migrating Young Sockeye Salmon
Author(s) -
Brett J. R.
Publication year - 1948
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(1945)75[97:tdaooa]2.0.co;2
Subject(s) - trap (plumbing) , netting , oncorhynchus , fishery , fence (mathematics) , funnel , current (fluid) , environmental science , flow (mathematics) , fish <actinopterygii> , hydrology (agriculture) , mechanics , geology , biology , geotechnical engineering , physics , oceanography , engineering , business , environmental engineering , finance , structural engineering
A means of obtaining young sockeye salmon, Oncorhynchus nerka, during their seaward migration by use of a netting fence and a central trap has been found successful in the Lakelse River, British Columbia. By operating at the point of maximum width and minimum rate of flow, the problems of current force and accumulation of debris were overcome. Increased rate of flow into the trap, which served to attract the fish, was obtained by use of a funnel entrance. It was discovered that the size of the openings of the trap must be such as to allow the entrance of schools of sockeye rather than individuals. These schools were found to converge and enter the trap more readily through slits in a horizontal plane than through those in a vertical position.