INFLUENCE OF MACROCLIMATE ON REPRODUCTIVE ABILITY AMERICAN MINKS OF DIFFERENT GENOTYPES

Abstract

The article highlights the results of the study of the influence of microclimatic factors (environmental temperature, atmospheric pressure, relative humidity and solar
activity) on the manifestation of the genetic potential of reproduction and the growth process of the young of the studied populations in the "genotype-environment" system.
The study of the level of influence of microclimatic parameters on the formation of the productivity of fur animals was carried out by using dispersion analysis with
establishing the share of influence of each of the factors.
The influence of paratypic factors on the realization of productivity indicators of minks of different color types in the conditions of modern animal husbandries was
determined. The influence of macroclimate indicators on the course of the mink mating season amounted to 4-87%, it was the maximum according to the indicator of the
strength of the influence of temperature on the date of manifestation of sexual desire for all studied genotypes. For the indicator of the share of influence of macroclimatic
parameters on the duration of pregnancy of females, high values were also characteristic - 7-24%, while the maximum influence on this process in scanbrown and
pearl females was low relative air humidity - 22-26%, for scanblack females - atmospheric pressure ( 39%). A detailed analysis of the calculated indicator of the
influence of climatic parameters on the realization of the reproductive capacity of scanbrown mink shows that the ambient air temperature during the breeding season
had a significant probable effect on all the studied indicators (6-43%, p<0.001). The indicator of relative air humidity also had a wide range in the indicator of the strength
of influence on the investigated characteristics - 0.1-72.0% and was probable in most of the characteristics except the indicator of fecundity of females.
The dependence of productivity indicators of minks of different color types in the conditions of the studied animal farms on macroclimatic factors was established.
The temperature regime during the mating season has a highly probable connection with the date of manifestation of sexual desire in females 0.77 (Р>0.95). The
relationship between the studied factor and fecundity of females turned out to be probable, where the corresponding coefficient was 0.91 (Р>0.95)