SEX HORMONE DYNAMICS IN THE BLOOD SERUM OF FEMALE BLUE FOX (VULPES LAGOPUS) DEPENDING ON AGE AND SEASON

• Main Authors: Berezina, Y.A., Koshurnikova, M.A., Bespyatykh, O.Y.
• Format: Conference Object
• Language: English
• Published: Инфинити 2019
• Subjects: ontogenesis; blue fox adult and young; age-related changes; enzyme immunoassay; progesterone; estradiol; Vulpes lagopus
• Online Access: https://dx.doi.org/10.34660/inf.2019.20.39877; http://naukarus.ru/public_html/wp-content/uploads/2019/Scientific research of the SCO countries - English Reports - October 29 - Part 2.pdf#page=133

The article presents a comparative analysis of changes in the concentration of progesterone and estradiol in female blue fox (Vulpes lagopus). Work on the collection of biomaterial was carried out in Zverokhozyaystvo Vyatka LLC of the Kirov oblast, Russia. We studied the blood serum of adults and the current year of birth of female foxes (16 goals). The research methodology is based on enzyme immunoassay. As a result of studies, it was found that the content of progesterone in female blue fox in the first months of life in the blood was low, gradually increasing during the development of the animal, reaching maximum values by December. In adult females, the concentration of progesterone was low in summer and autumn, but higher than in puppies at the same time. By December, there is an increase in progesterone secretion, reaching high values by the second stage of estrus, which indicates the beginning of ovulation. After ovulation, its level continues to grow for 23 weeks, ultimately reaches maximum values after coating. At all stages of the study, the concentration of progesterone in adult animals was higher than in young animals. The highest concentration of estradiol was noted in September, then it gradually decreased to the rutting period. Over the entire study period, the concentration of estradiol in adult animals was higher than in young animals.