USING OF CHORIONIC GONADOTROPIN FOR STIMULATION OF REPRODUCTIVE FUNCTION OF MARMOT FEMALES
A development of marmot breeding in captivity is complicated by late puberty of animals (more than 70% of animals begin to breed in 3-years old). Most of the females breed ones in two years or for 5-6 years stays free of offspring. The aim of our work is to establish the effect of CG on the reproductive capacity of marmot females to investigate the possibility of increasing the reproductive capacity. Before we had some objectives: to study the effect of CG on the reproductive ability of marmot females of different ages; to determine the effect of different doses of CG on the reproductive ability of marmot females. The work was carried out on the marmot farm of OAO «Plemzavod «Pushkinskiy», Moscow region. Opening of the cages were made February 1. At this time the test of loops in females and testes in males was conducted. The method of vaginal smears was used for monitoring of the development of the estrous cycle (stage of wish and ovulation) after the end of hibernation from along with an estimate of the outer loop changes and behavior of females. It was formed two groups of animals with different doses of the drug CG: Group 1 - 100 IU: Group 2 - 200 IU. The drug was injected once in the assessment of loop in 5 points and under smear in the stage of estrus. Experimental data on the reproductive capacity of marmot females with using CG were obtained. As a result of researches it is establiched that application of CG makes positive impact on reproductive ability of groundhogs. Fertility at the females processed by CG made 4,77, at not processed - 3,0 puppies. 4,22 and 2,44 puppies are registered on safely both breeding a female respectively. CG application during the period estrus promotes receiving an issue from earlier not both breeding females.