GENETIC AND FISH-BREEDING BIOLOGICAL RESEARCH ON STURGEON SPECIES FOR THE PURPOSE OF ARTIFICIAL REPRODUCTION

Abstract

The results of the spawning campaign using producers of beluga and Russian sturgeon, whose offspring were grown in industrial conditions and released into a water body of fishery importance, are considered. A genetic and fish-breeding-biological assessment of producers of sturgeon species for the purposes of artificial reproduction is given. Indicators of genetic characteristics of fish producers have been revealed. It has been determined that beluga producers have a reason for If the homozygosity of the species is high, it is necessary to carefully select parent groups taking into account the genetic characteristics of individuals to avoid closely related crosses and to use parental pairs rather than groups. Due to the high number of breeders, Russian sturgeon producers have a choice that allows them to take pairs of individuals with the least number of common alleles to obtain genetically diverse offspring. Fishbreeding and biological studies of beluga producers showed a tendency to reduce reproductive indicators depending on the number of generations in factory conditions, in Russian sturgeon producers the indicators of females with the second and third generations of offspring were almost identical, with slight deviations from each other. The practical significance is determined in the rational and effective use of the fish-breeding and genetic potential of producers in order to obtain the most genetically diverse juveniles, which will ultimately have a positive impact both on the preservation of the gene pool of sturgeon populations and on the survival of offspring at the rearing stage.