COMPARATIVE CHARACTERISTICS HORMONAL STATUS OF HEREFORD CATTLE OF CANADIAN AND SIBERIAN SELECTION
Adaptation of imported cattle to new technological and climatic conditions are largely determined by the endocrine system. The article deals with the dynamics of adrenocortical hormones (cortisol) and thyroid (thyroxine, triiodothyronine) in animals of the Canadian and Siberian breeding in the conditions of the Altai Territory.