Ontogenetic formation and seasonal dynamics of endocrine function of gonads in cage maintained fur animals of Martens family (sable, pole cat)
2008
Shulgina, N.K., Russian Academy of Agricultural Sciences, Moscow (Russian Federation)
The study was carried out on young (2-27 month of age) and grown-up (4-5 years) males and females of sable, on young pole cats (2-7 mo of age) and females of pole cats during rut period. The level in blood plasma of estradiol-170, progesterone and active androgens (testosterone and 5a-digydrotestosteron) was determined and histological investigations were carried out. Histological structure of ovary in females of martens at 5 mo of age has been shown to be near to definitive one. This may suggest that the functional state of ovary in females at 5 months of age is near to such as in females during rut period, but at a later time, under the effect of seasonal factors, the activity of gonads decreases. Endocrine activity of adult animals sharply increases in March and thereafter it increases more slowly up to June. So, the dynamics of sex steroid hormones in blood plasma in males and females of sable and polecat reflects the level of gonads functioning: the activity of their endocrine function increase s during rut periods and decreases during autumn-winter season
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