Productivity of Sharp-Tooth Catfish Depending on Feeding Methods

The automatic adaptive feeder for fish feeding in recirculation plants has been developed and tested. It was found that the use of this feeder allowed to increase the yield of fry per 1 m3 by 35% and 13.6%; the yield of fingerling – by 45.9% and 18.5%; in the final period of cultivation – by 52.3% and 21.9% in comparison with hand-feeding and traditional auto-feeding without the adaptation function of the autofeeder. Accordingly, using an automatic adaptive feeder, it was possible to obtain by 71.7 kg and 37.6 kg more fish per 1 m3 of recirculating aquaculture system (RAS) during one production cycle than using the existing technology. It helps to make an additional clear profit from the sale of products for 6,702 rubles 88 kopecks from 1 m3 of RAS in comparison with handfeeding and 3,503 rubles 09 kopecks in comparison with automatic feeding without the adaptation system. Keywords—recycling plants for fish farming, RAS, fish automatic feeding, automatic feeder for fish, feeding behavior of fish, sharp-tooth catfish