Change of Morphometric Indicators of Shoulder Bone during Postnatal Ontogenesis of Egg-Layer Chicken

Abstract

The dynamics of changes in the linear dimensions of the free bones of the wing (forelimb) of egg hens in postnatal ontogenesis was studied. The absolute indices of the linear dimensions of the free bones of the wing accelerate from the first day of postnatal ontogenesis to 16 days of age, and this state continues until the period of physiological maturity of chickens, that is, up to 168 days of age, while the growth rate from 280 days to 570 days of age slows down due to the intensification of the process of their egg production.