Effectiveness of Fish Screens to Prevent Entrainment of Westslope Cutthroat Trout into Irrigation Canals
作者： Steven B. Gale , Alexander V. Zale , Christopher G. Clancy
DOI: 10.1577/M07-096.1
关键词: Fishery 、 Irrigation 、 Oncorhynchus 、 Juvenile 、 Fish migration 、 Biology 、 Life stage 、 Trout 、 Entrainment (chronobiology) 、 Ecology (disciplines) 、 Aquatic science 、 Ecology, Evolution, Behavior and Systematics 、 Management, Monitoring, Policy and Law
摘要: Abstract Irrigation canals entrain anadromous and potamodromous salmonids of all life stages during their annual migrations. Fish screens may reduce or eliminate entrainment, but few studies exist on benefits these have evaluated effects populations only. The fish for nonanadromous are largely unknown. Postspawn adult downstream-migrating juvenile westslope cutthroat trout Oncorhynchus clarkii lewisi potentially entrained into irrigation Skalkaho Creek, Montana. We quantified entrainment rates the using telemetry driftnetting before (2003) after (2004) installation three canals. No radio-tagged adults were in 2003, most residents therefore did not migrate past In 2004, 79% migratory at either screened unscreened canals, those successfully bypassed back to Sk...
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