The effect of the alternative protein raw material «Gaprin» – a product of microbiological synthesis on the productive qualities of rainbow trout

Summary. The protein component in the composition of combined feeds for salmon is of great importance. The shortage of protein raw materials in the domestic feed market leads to the need to search for alternative sources. The possibility of using the product of microbiological synthesis "Gaprin" as part of production salmon feeds has been experimentally proven. Experimentally revealed the advantage of compound feeds containing 50 and 75% of the substance "Gaprin", instead of fishmeal, which is the optimal rate of its input.

Introduction. The quality and quantity of protein in the composition of combined feeds for salmon is of great importance. However, today there is a shortage of protein raw materials for the production of feed on the domestic market, and in this regard, alternative sources are being searched for. It is known that this quality can be: products of microbiological synthesis, meat flour, hydrolysis yeast, plant components, etc. The substance "Gaprin" is 70-79% crude protein. It is a protein product with a high content of B vitamins (in particular B12), amino acids and trace elements that fully meet the needs of animals in them. Therefore, the experimental determination of the norms for the input of biomass of the product of microbiological synthesis "Gaprin" into compound feed for rainbow trout is an urgent direction.

Object. Rainbow trout grown on domestic production feeds with the addition of the product of microbial synthesis "Gaprin".

Materials and methods. The experiment was carried out in the installation of the Ultrasonic Research Center "Breeding of valuable sturgeon breeds" of the Volgograd State Agrarian University. The study was conducted using standard zootechnical experience – a method of comparing control and experimental groups and further evaluating their productive qualities. The effectiveness of the introduction of "Gaprin" into the diet was determined by weight gains, linear indicators, fatness and safety of individuals in each group. After the measurements, the absolute, average daily and relative increments were calculated.

Results and conclusions. By evaluating the results of the experiment, by testing the productive qualities of the studied individuals of rainbow trout, the advantage of the effectiveness of compound feeds containing 50 and 75% of the substance "Gaprin", instead of fish meal, which is the optimal norm, has been proved.

1. Abrosimova N. A., Abrosimova E. B., Abrosimova K. S., Morozova M. A. Feed raw materials and biologically active additives for fish aquaculture facilities. St. Petersburg: Lan, 2019. 156 p.

2. Vlasov V. A. Fish farming. St. Petersburg: Lan, 2020. 352 p.

3. Komlatsky V. I., Komlatsky G. V., Velichko V. A. Fish farming. Saint Petersburg: Lan, 2021. 200 p. http://e.lanbook.com

4. Nechaeva T. A., Rybalova N. B., Temirova S. U. Modern technologies in aquaculture: a textbook. St. Petersburg: SPbGAU, 2018. 94 p. http://biblioklub.ru/index.php?page=book&id=486923.

5. Ponomarev S. V., Grozescu Yu. N., Bakhareva A. A. Industrial fish farming. Saint Petersburg: Lan, 2021. 416 p. http://e.lanbook.com

6. Ponomarev S. V., Bakaneva Yu. M., Fedorov Yu. V. Aquaculture. Saint Petersburg: Lan, 2021. 440 p. http://e.lanbook.com

7. Sklyarov V. Ya. Feed and feeding of fish in aquaculture. M.: VNIRO Publishing House, 2008. 150 p.

8. Randelin D. A., Novokshchenova A. I., Kravchenko Yu. V. Study of feeding biotechnics and the effectiveness of domestic production feeds in the diet of rainbow trout (oncorhynchus mykiss) and amber trout (oncorchynchus mykiss walbaum) in the conditions of the PNIL "Breeding of valuable sturgeon breeds". Innovative technologies in the agro-industrial complex in modern economic conditions: materials of the International Scientific and Practical Conference. Volgograd, 2021. Pp. 356-361.

9. Randelin D. A., Novokshchenova A. I., Kravchenko Yu. V., Vorontsova E. S., Kuznetsova T. V., Ramazan A.K. The effect of the feed additive "beta-flora" in the composition of production salmon feeds on the economic and biological indicators of rainbow trout. Izvestiya Nizhnevolzhsky agrouniversitetskogo complex: Science and higher professional education. 2022. No 4 (68). Pp. 225-232.

10. Randelin D. A., Novokshchenova A. I., Kravchenko Yu. V., Vorontsova E. S., Ramazan A. K. The effect of protein concentrate "agro-matic" on the productive qualities of rainbow trout (oncorhynchusmykiss) and amber trout (oncorchynchus mykiss walbaum). News of the Nizhnevolzhsky Agro-University complex: Science and higher professional education. 2022. No 3 (67). Pp. 334-344.

11. Faritov T. A. Fish feeding. St. Petersburg: Lan, 2020. 348 p.

12. Khrustalev E. I., Khainovsky K. B., Goncharenok O. E., Molchanova K. A. Fundamentals of industrial aquaculture. St. Petersburg: Lan, 2019. 280 p. http://e.lanbook.com

13. Khrustalev E. I., Kurapova T. M., Goncharenok O. E., Molchanova K. A. Modern problems and prospects of aquaculture development. St. Petersburg: Lan, 2017. 416 p. http://e.lanbook.com

14. Khrustalev E. I., Kurapova T. M., Goncharenok O. E., Molchanova K. A. Feed and feeding of fish in aquaculture. St. Petersburg: Lan, 2021. 388 p.