Reproductive qualities of minks with the use of veterinary preparations
Animal husbandry of Udmurtia is represented by several animal farms that have high rates of business output of young animals - 5.43-5.77 puppies per main female, which is higher than the average for animal husbandry farms in Russia. The aim of the research was to study the effectiveness of use of various preparartions in improving the reproductive qualities of minks and vital activity of their offspring. When conducting research, it was offered to use a complex of preparations. The first group of females received gonadotropin horiogonin and «Purevitin», and the second veterinary preparation «Lyutragon» and «Purevitin». The control group only hormone horiogonin. The results showed that the number of successfully foaled females of the first and second groups is greater than in the control by 10.5 and 21.0%, respectively. The fertility of minks of the second experimental group was 5.83 heads, which is 14% more than in the control analogues. Safety in the 1st and 2nd experimental groups was higher by 8.1 and 12.2 percentage points compared to the control analogues, respectively. The business output of young animals, taking into account the safety in the 2nd group, was 5.71 goals, 263 puppies were raised for slaughter, and in the first experimental group - 5.4 and 227 goals, respectively. The rate of business output of young animals in the control group was lower by 23 and 29% compared to the first and second experimental groups, respectively. Thus, when breeding mink to stimulate and improve the natural resistance of organism, the reproductive qualities of females during the rut, increasing the yield of young animals and its safety it is advisable to include a mixture of preparations hormone «Lutragon» and «Purevitin», promoting increase of profitability of up to 110 %.