Based on the results obtained in the experiment on the growth and development of a hybrid of Russian and Siberian sturgeon (RO ? LO) when using various dosages of the biologically active feed additive "Abiotonic" in feeding, the feed conversion of the sturgeon hybrid was calculated. The calculation of the economic efficiency of growing a sturgeon hybrid showed that when selling fish, the largest gross profit was obtained in the group fed with 1 ml of the Abiotonic feed additive per 1 kg of fish weight. The cost of 1 kg of fish in this experimental group was lower than the control figures and data on the cost of 1 kg of fish from the experimental group, which was introduced into the diet of 0.5 ml of the additive, by 16.53 and 1.19 rubles. The profitability of growing sturgeon hybrid when included in the diets of 0.5 and 1.0 ml of the biologically active additive "Abiotonic" was approximately at the same level and amounted to 22.86% and 22.71%, which is higher than the control figures by 1.98 and 1.83%.
The results of the research work on feeding the biologically active additive "Abiotonic" showed that the best growth and development indicators were distinguished by sturgeons of the 2 experimental group, who received 1.0 ml of "Abiotonic" per 1 kg of live weight. The gross increase of one individual during the experiment in this group exceeded the control values by 6.96 %, the average daily increase by 7.1 %, and the relative increase by 9.53 %. Hybrids of the 2 experimental group exceeded the indicators of individuals from the control group in biological carcass length by 9.23 %, in head size by 5.58 %, carcass length by 11.79 %, tail stem length by 8.04 % and tail fin length by 8.56 %. Feeding the feed additive "Abiotonic" did not have a negative effect on the development of the internal organs of sturgeons, they did not have pathological changes in development. The costs of compound feed, crude protein and energy in the experimental groups receiving the feed additive "Abiotonic" with compound feed were 2.0 - 7.9 % lower than the control data.
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