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2022, № 102

UDC: 639.31:639.3.043.2
GSNTI: 69.25.14

Increasing the rate of maturation of stager caviar

The purpose of the research was to study the effect of feeding milt and glycerol in the composition of diets on the rate of maturation of the reproductive products of female sturgeons. The object of this study was a replacement herd of sturgeons - hybrids of beluga and sterlet (Bester), 30 fish per group. The duration of the experiment was 8 months. The fish were kept in temperature controlled pools. The first group was the control and received complete feed without additives. The second group of the experiment received 98% of the complete feed and glycerol 2.0% by weight of the feed. The third group of the experiment received 98% of the complete compound feed and dried carp milt 2.0% by weight of the feed. The experiment was carried out on groups of fish of 3-4 stages of maturity. The inclusion of milt and glycerin in the complete feed for sturgeons had a positive effect on their final live weight. The addition of 2% glycerol to the complete compound feed contributed to an increase in gross fish growth by 8.8% (P<0.05). When 2% of dried milt was included in the complete compound feed, there was a significant increase in gross growth by 8.4%. Based on the data obtained in the course of the experiment, it can be concluded that the use of dried milt at a dosage of 2% by weight of compound feed in the feeding of bester females during the transition from stage 3 to stage 4 of maturity is effective, since this allows you to increase the absolute and relative fecundity (by 6 .0 and 4.9% compared with control); to reduce the period of transition of fish from the 3rd to the 4th stage of maturity (by 4.1% compared to the control), to increase the diameter of eggs at the 4th stage of maturity (by 8.3%); as well as increase profitability by 4.4%.
Keywords: Sturgeons, glycerol, milt, maturity stage, fertility, egg diameter.
DOI: 10.21515/1999-1703-102-325-329

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Authors:

1. Yurin Denis Anatolievich, PhD in Agriculture, FSBSI "Krasnodar Research Centre for Animal Husbandry and Veterinary Medicine".
2. Maxim Ekaterina Aleksandrovna, PhD in Biology, Federal State Budgetary Educational Institution of Higher Education “I.T. Trubilin Kuban State Agrarian University”.
3. Skamarokhova Alexandra Sergeevna, postgraduate, FSBSI "Krasnodar Research Centre for Animal Husbandry and Veterinary Medicine".
4. Tletseruk Irina Rashidovna, DSc in Agriculture, FSBEI HE "Maykop State Technological University".
5. Hagur Fatima Rashidovna, PhD in sociologi, FSBEI HE "Maykop State Technological University".