THE EFFECT OF FEED ADDITIVES FROM FISH MILT AND GLYCERIN ON TROUT PRODUCTIVITY INDICATORS

In order to study the effect of newly developed feed additives from fish milt and glycerin on the indicators of productivity, quality and maturation rate of salmon gametes, a study was conducted on females of amber trout in the conditions of recirculating water supply plants in the peasant farm Azhogin Alexander Anatolyevich (the Rostov Region, Shakhty) in 2022. There were 50 fish in the control and 2 experimental groups. All groups used complete mixed feed for salmon fish produced by BISKO LLC (Bryukhovetsky District of the Krasnodar Region). In the experimental groups, the fish received an emulsion of milt with glycerin – a newly developed reproductive food to stimulate and optimize the maturation of gametes. The research results were processed biometrically according to N.A. Plokhinsky (1969) and G.F. Lakin (1990). The economic effect was calculated in accordance with the recommendations of the Russian Academy of Agricultural Sciences (2007). The inclusion of milt with glycerin in the ratio of 80 to 20 % in the amount of 2 % by weight of the feed into the complete feed for trout contributes to the absolute and relative productivity to the greatest extent, leads to an increase in fertility by 2.8 % (P<0.05) and a decrease the number of days to reach the 4th stage of maturity by 4.0 % (P<0.05) in comparison with the control; The use of additives from fish milk and glycerin in fish feeding makes it possible to increase the profitability of trout caviar production by 4.4–7.1 %.