Hereditary effect of singer's mothers on terms and character of estrus of daughters

The article proves the reasons for the selection of female Arctic foxes in the breeding group, depending on the duration and nature of estrus, which determines the reproductive abilities of the offspring of female breeding stock. Estrus in females is determined by the term and nature, and inherited character. Thus, estrus in the breeding group is regulated, in the case of stock breeding to improve the duration of the females estrus. Selection of females, depending on their physiological characteristics, including the nature of estrus and early hunting, in the breeding stock will provide a greater number of skins with a large size.