Analysis of the obtained sexual products quality and Russian sturgeon offspring during the spawning campaign in a cage complex

The article analyzes the quality of the obtained sexual products and offspring of Russian sturgeon during the spawning period in the cage complex “Sturgeon farm IP Rogozhkin”. A commodity farm fully provides itself with its own producers to produce offspring from its own planting material and through the acquisition of juveniles, as well as mature females and males on other farms to update the gene pool. It should be noted that the development of sturgeon embryos in a cage complex located in the Kamyzyaksky district of the Astrakhan region sometimes took place at elevated water temperatures, which affected the process of embryogenesis, leading to accelerated hatching of larvae. Under these conditions, it was important to study the morphological parameters of Russian sturgeon larvae, which include body weight, body size, and yolk sac. The study showed that the temperature increase during the spawning campaign in 2018 affected the duration of the embryonic development of the Russian sturgeon compared to 2021. An increase in the number of abnormally developing embryos occurred at the gastrulation and final stages – by 5.1%. In 2019, the rate of embryo development abnormalities was high, which is associated with an increase in water temperature. In 2020, the maximum number of abnormalities in the development of eggs at the crushing stage was 3.5%, and in 2021, the smallest number of abnormally developing embryos was at the gastrulation stage and before hatching – 4.5%.