Abstract
The paper considers the functional changes in the reproductive function of sturgeon species of different ages and their hybrids. The dynamics of the development of gonads of females and males during the reproductive cycle is studied. According to the results of studies, it is shown that when the hydrological and hydrochemical regimes of cultivation are stabilized, spawning intervals are reduced, as well as the time of maturity. In this case, the physiological and biochemical status of females at the final stages of maturity is normal, which is confirmed by research results. The development of oocytes in females raised under regulated conditions takes place without any deviations.
Highlights
In recent years, the influence of various forms of human economic activity on the natural nature has increased, which leads to deep negative changes
The analysis of sterlet gonadogenesis revealed that 39.7% of 63 individuals are males and 60.3 % are females, while the hybrid has a male share of 29.8% and a female share of 70.2%
It was revealed that at the age of 26 months, males were at the II, III, IV stages of maturity
Summary
The influence of various forms of human economic activity on the natural nature has increased, which leads to deep negative changes. The objective of our research was a comparative analysis of the development of the reproductive system, the study of the maturation and inter-spawning periods of various types of sturgeons and their hybrids when grown in ultrasonic testing.
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