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2023, № 108

UDC: 639.3.043
GSNTI: 69.25.15

Effect of feed additives based on glycerol and milt on the quality of caviar of salmon fish

The effect of reproductive feed containing fish milt and glycerol on the productivity indicators of salmon fish has been studied. Amber trout was used for the experiment. The fish in all groups were under the same conditions in closed water supply installations. Complete feed for trout produced by BISKO LLC (Bryukhovetskaya village) was used to feed trout in all groups. Fish in experimental groups 2-5 additionally received an emulsion of milt with glycerol. The experiment was carried out in the conditions of a peasant farm Azhogin Alexander Anatolyevich, Rostov region, Shakhty. Groups of 25 fish at the age of 3 years were formed according to the scheme for determining gonad maturity according to Kiselevich. The experiment on amber trout lasted 6 months. Absolute and relative fertility and the timing of egg maturation were studied in a comparative aspect. In the second group, this indicator was lower by 0.02 thousand pieces, or 0.6%, than in the control. In the third group, there was a positive trend towards an increase in fertility by 1.6%, compared to the control. In the fourth and fifth groups, a significant increase in this indicator was noted by 2.8% (P<0.05) and 4.5% (P<0.05) relative to the first group. A decrease in the age of reaching stage 4 of maturity was found in the third and fourth groups by 3.0%, relative to the control group. A significant decrease in this indicator was found in the fifth group by 4.0% (P<0.05) compared to the control. A significant increase in the diameter of trout eggs by 6.1% (P<0.05) was noted in the fifth group, relative to the control. The use of feed containing fish milt and glycerol can increase the profitability of trout egg production by 2.8-10.1%.
Keywords: Salmon fish, trout, roe, aquaculture, feed additive, glycerin, milt.
DOI: 10.21515/1999-1703-108-170-175

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Authors:

1. Maxim Ekaterina Aleksandrovna, PhD in Biology, Federal State Budgetary Educational Institution of Higher Education “I.T. Trubilin Kuban State Agrarian University”.
2. Yurin Denis Anatolievich, PhD in Agriculture, FSBSI "Krasnodar Scientific Centre for Animal Husbandry and Veterinary Medicine".
3. Machneva Nadezhda Leonidovna, PhD in Biology, Federal State Budgetary Educational Institution of Higher Education “I.T. Trubilin Kuban State Agrarian University”.
4. Tletseruk Irina Rashidovna, DSc in Agriculture, FSBSI "Krasnodar Scientific Centre for Animal Husbandry and Veterinary Medicine".
5. Ezhkin Michail Alexandrovich, PhD student, FSBSI "Krasnodar Scientific Centre for Animal Husbandry and Veterinary Medicine".