CHEMICAL COMPOSITION AND NUTRITIONAL VALUE OF MEAT OF DIFFERENT GENOTYPES OF STURGEON IN INDUSTRIAL PRODUCTION

Abstract

The paper presents results of studies of nutritional and biological value of sturgeon of different genotypes. Experimental studies were carried out at OOO "Mulinskiy fish farm" of Nizhny Novgorod region in 2021. The object of the study was sturgeon of various genotypes (Russian sturgeon, Siberian sturgeon, hybrids of Russian sturgeon with Siberian and hybrids of Siberian sturgeon with Russian species). Chemical composition of fish meat in industrial production (percentage of moisture, protein, fat and ash) was determined. It was established that the hybrids of Russian sturgeon with Siberian species have the highest parametres of commercial (61.1 cm) and total length (76.2 cm), according to the size and mass characteristics of sturgeon at the age of two years, and the hybrids of Siberian sturgeon with Russian exceeded all other groups in terms of total body weight (2173 g), therefore, heterotic effect appeared, i.e. the ability of hybrids of the first generation to surpass parental forms in viability, fertility and other characteristics. It was shown that under the same conditions of keeping and feeding of sturgeons of different genotypes, pure species of Russian sturgeon occupy a predominant position in terms of protein and fat content - 26.43% and 8.18%, respectively. As for moisture and ash content, hybrids of Russian with Siberian - 73.77 and 0.61% and Siberian with Russian - 72.6 and 0.66% are ahead of their peers. Conclusions are drawn about the quality of meat and its value in nutritional aspect. Statistical processing of data from scientific and economic studies was carried out according to generally accepted formulae of variation statistics using Microsoft Excel programs.