Community Research and Development Information Service - CORDIS

Acoustical patterning triggers feeding frenzy

Fish farms require careful and constant monitoring of a variety of factors in order to secure the best yields of healthy, edible fish. Automated services carefully balance these factors from water temperature to salinity to produce as stable and as profitable environment as is possible. Despite these systems, a large problem still exists in feeding the fish.
Acoustical patterning triggers feeding frenzy
The variety of fish farm feeding mechanisms are mostly automated systems that automatically distribute food into the water according to the certain feeding times. The problem is that fish that are not hungry at the times of food distribution will not eat, while those fish that are hungry will generally over eat. The result is that you get an uneven feeding pattern.

A wide range of research has been conducted therefore, to produce an automated feeder that can augment food distribution through a process initiated by the fish themselves. A French study now investigates the audible stimulation of feeding fish, through monitoring the sounds that fish make when eating. Using hydrophones placed in the environment, this patented technology releases food as and when desired, at the times triggered by the fish themselves.

Generally, many fish make a "clacking" sound when feeding and the hydrophones in their tank releases food when it detects these sounds. The hungry fish then eat. The result may not be regular feeding times, but certainly more evenly distributed feeding patterns are attained. The developers are interested in developing the system further through research and are seeking collaboration for this as well as license agreements.
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