The manner which raises the survival ratio and or growth rate of the fish and in order to respond at underwater in advance vis-a-vis a certain sound signaling, trains the fish the manner

摘要

The method of enhancing the survival and/or growth rates of fish in an aquatic environment, involves providing a feeder at a selected location for dispensing food to the aquatic environment, and providing an acoustic projector for generating acoustic signals within the frequency range 10Hz-4kHz. A frequency is ascertained within the range to which the fish are preconditioned to respond, and food is periodically dispensed from the feeder and, at times coordinated with those at which food is dispensed. The acoustic projector is actuated to generate an acoustic signal at the ascertained frequency. The signal has a duration exceeding one second.