RESULTS OF GROWING JUVENILES TILYAPIA AND CLARY CATFISH IN MINI- CLOSED WATER SUPPLY INSTALLATION USING LIVE FEED
The article presents the results of growing juvenile tilapia (Oreochromis niloticus) and clary catfish (Clarias gariepinus) in a mini- closed water supply installation in an incubation workshop at a fish farm of «Kapshagai Spawning and Growing Farm-1973» LLP in Almaty Region. During the work, generally, accepted methods of growing heat-loving fish were used, water quality was assessed according to methods generally accepted in hydrochemistry. The data on the main hydrochemical parameters of water in mini- closed water supply installation of rearing juveniles of valuable fish species are presented. A comparative analysis of the fish-biological indicators of juvenile tilapia and clary catfish is given. As a result of the studied fish-biological indicators of tilapia and clary catfish. Each type of live food (daphnia, moina) was awarded a certain rating place in relation to its use as fish food.
As a result of the work, it was found that the cultivation of fish planting material of tilapia and clary catfish in conditions of mini- closed water supply installation when using live food is effective. The average weight of juvenile tilapia and clary catfish when grown under such conditions was 0.5-0.6 g, with a survival rate of 96-98%. The obtained results of the work carried out show that when using various types of live food for juveniles of tilapia and clary catfish in the early stages of ontogenesis, moina is more effective than daphnia.