Automatic feeding and Harvesting of Juvenile Atlantic Cod (Gadus Morhua L.) in a Pond

• Published in: Modeling, Identification and Control: A Norwegian Research Bulletin
• Main Authors: V. Øiestad, T. Pedersen, A. Folkvord, Å. Bjordal, P.G. Kvenseth
• Format: Article in Journal/Newspaper
• Language: English
• Published: Norwegian Society of Automatic Control 1987
• Subjects: Aquaculture; biocontrol; computer control; Electronic computers. Computer science; QA75.5-76.95; Saltwater Pond; atlantic cod; Gadus morhua
• Online Access: https://doi.org/10.4173/mic.1987.1.5; https://doaj.org/article/4ce2cf752a654d538d1db0f3aff8260d

Large scale production of juvenile Atlantic cod has been carried out since 1980 in a saltwater pond. A break-through was obtained in 1983 with high survival rates of cod larvae to metamorphosis. In 1985 we made progress in two fiels, reduced cannibalism and automatic harvesting. Juvenile cod formed large schools while fed dry pellets in the currents set up by five propellers. An underwater loudspeaker was programmed to give sound pulses just before feeding. During harvesting dry pellets were released inside a fish trap while giving the sound signals the cod juveniles were conditioned to. The cod readily entered the trap and a computer-controlled fish pump transported the fish from the fish trap into a storing tank and grading grids. The trap gradually emptied the pond of fish and more than 80