Developments in the Use of Infrasound for Protecting Fish at Water Intakes

by E. P. Taft,
N. A. Brown,
T. C. Cook,
J. P. Ronafalvy,
M. W. Haberland,



Document Type: Proceeding Paper

Part of: North American Water and Environment Congress & Destructive Water

Abstract:

Attempts to protect fish at water intakes with sound generating devices have been ongoing for decades. Past results have been equivocal. However, the recent availability of high energy, underwater sound transducers has resulted in renewed efforts and greater success in the use of sound as a fish repellent. A number of studies have been conducted which demonstrate the repelling effect of sound frequencies in the 200 Hz to 150 kHz range. Researchers are now investigating the potential effectiveness of infrasound (e.g., 5 to 50 Hz) in repelling species that have not responded to higher frequencies. Studies with Atlantic salmon, striped bass and white perch have shown strong responses and further research is planned.

Subject Headings: Water intakes | Fish and fishery management | Acoustics

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