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US 5,291,858 AGranted
Sound conditioning in fish
AssigneeOntario Hydro
InventorsPaul H. Patrick, Janusz J. Kowalewski, Edward A. McLeod, Alexander Sakuta, Michael B. Colbert
Life of this patent
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Abstract
The invention provides a method of preconditioning selected species of fish to associate characteristic acoustic signals with food, thereby to induce the fish to congregate towards a selected location in response to such acoustic signals.
Claims7
A method of enhancing the survival and/or growth rates of fish in an aquatic environment, comprising
- providing a feeder at a selected location for dispensing food to the aquatic environment,
- providing an acoustic projector for generating acoustic signals within the frequency range 10Hz-4kHz,
- ascertaining a frequency within said range to which the fish are preconditioned to respond,
- periodically dispensing food from the feeder and, at times coordinated with the times at which food is dispensed, actuating the acoustic projector to generate an acoustic signal at said ascertained frequency.
1 more element
A method of preconditioning fish to congregate towards a selected location in an aquatic environment, comprising
- providing a feeder for dispensing food to the aquatic environment at said location, providing an acoustic projector for generating acoustic signals within the frequency range 10Hz-4kHz,
- ascertaining a frequency within said range to which the fish are responsive,
- periodically dispensing food from the feeder and, at times coordinated with the times at which food is dispensed, actuating the acoustic projector to generate a signal at said ascertained frequency.
Dependencies are inferred from the claim text.