Functional Orientation of Biochemical Processes in Female Beluga × Sterlet (Acipenser ruthenus Linnaeus, 1758 × Huso huso Linnaeus, 1758) Hybrids in the Reproductive Cycle

Abstract

The article reports data on the dynamics of blood parameters and parameters of protein, fat, and water-salt metabolism in female starlet × beluga hybrids kept under artificial conditions in the period of reproductive cycle. Gonad maturation in female hybrids in the artificial environment causes clear changes in the biochemistry of blood and of urine.

Features of the reproductive system development in the installations of closed water supply system

“…In the study of some physiological indicators, no functional disorders were detected in fish kept in regulated conditions (table 1). The values of erythrocyte sedimentation rate and total serum protein were in the previously established ranges of variability for sturgeon during maturation -2.0-4.0 mm / h and 28.0-40.0 g / l, respectively [20,21]. Hemoglobin, as an indicator of the activity of metabolic processes in the body, in the blood of sturgeon varies between 50.0-80.0 g/l.…”

“…The cholesterol content in both species was at the level of 3.5-3.78 mmol / l. the Total range of cholesterol variability in sturgeon was 1.0 -2.8 mmol/l. In natural breeders during spawning migration, its concentration in blood serum increased from 1.87 to 4.45 mmol / l. after the winter break, the cholesterol content increases from 2.80±0.20 to 4.11±0.21 mmol / l, which is associated with active utilization of lipid reserves and the final completion of the process of gonad formation in fish contained in the RAS [21].…”

“…However, during the growth of oocytes, its concentration in the blood increases, as evidenced by the data obtained, which noted that the value of this indicator was slightly increased 81.7-97.5 g/l. A decrease in the hemoglobin content in the active phase of formation of sexual products indicates a violation of generative exchange, and an increase in the content after the winter period is associated with the need for additional energy for the final completion of the gonad formation process [20,21]. The cholesterol content in both species was at the level of 3.5-3.78 mmol / l. the Total range of cholesterol variability in sturgeon was 1.0 -2.8 mmol/l.…”

Seasonal dynamics of the total lipid content in the body of the anchovy Engraulis encrasicolus (Linnaeus, 1758) in 2017-2020

“…At this stage, fish need an increased level of energy for the processes of plastic metabolism. The source is lipid reserves that were accumulated during the feeding period of the previous year [3].…”