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Effects Of An Acoustic Behavioral Barrier On Juvenile Salmonid Entrainment At An Irrigation Canal Intake On The Wenatchee River At Dryden Dam, Washington

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Abstract
None supplied. Introduction: Sonalysts, Inc. desired to demonstrate that very low frequency (VLF) sound can have practical application as a barrier to movement of juvenile salmon and trout into potentially harmful areas, in this case an irrigation canal intake. The study was designed to determine if the number of juvenile steelhead entering the Dryden canal intake would be reduced by operation of an acoustic behavioral barrier upstream if the intake. A series of VLF transducers were placed in a line from the shoreline at an angle from the canal intake to prevent fish from entering the zone of hydraulic influence of the canal intake. The acoustic barrier was operated on alternating days, and the number of fish passing through the canal was enumerated at a point about 900 feet downstream from the intake.
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1995
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