ИЗМЕНЧИВОСТЬ РАЗМЕРНО-ВЕСОВЫХ ПОКАЗАТЕЛЕЙ И РЫБОПРОДУКТИВНОСТЬ ЧЕТЫРЕХЛЕТОК И ПЯТИЛЕТОК РУССКОГО ОСЕТРА, ВЫРАЩЕННЫХ В ПРУДОВОМ ХОЗЯЙСТВЕ РЕСПУБЛИКИ КАЗАХСТАН

Abstract

The paper presents the analysis results of the body weight and length variability (body mass, zoological length, length up to the end of middle fin rays, fatness, mass-accumulation coefficient, growth), fish-productivity and gross-production in 4-year-old and 5-year-old Russian sturgeons ( Acipenser gueldenstaedtii , Brandt) cultivated in adapted ponds together with herbivorous fishes (grass carp ( Ctenopharyngodon idella ), silver carp ( Hypophthalmichthys molitrix ). The analysis helped to reveal some regularities about variability of 4-year-old and 5-year-old Russian sturgeons ( Acipenser gueldenstaedtii , Brandt) cultivated in artificial ponds adapted for carp breeding. The paper gives average values of body mass and length, variability characteristics, according to biological statistic parameters; analysis of absolute growth in different age groups of the Russian sturgeon cultivated at the pond carp farms. Gross-production values for 4-year-old and 5-year-old sturgeons are recommended to be taken as 337 and 450 kg/ga, correspondingly. It should be noted that 450 kg/ga is not considered as an ultimate gross-production value for the Russian sturgeon cultivated in the fish farms adapted for carp breeding.