BIOLOGICAL FACTORS DETERMINING EGG PRODUCTION IN EGG LAYING HEN

Abstract

Egg production in egg laying hen depends on the action and interaction of hereditary and environmental factors. The number and nature of these factors, the physiological factors of their action, and their share of the egg production, though not enough known yet, raise a series of questions for aviculturists concerning the continuous improvement of poultry improvement technologies and of raising and exploiting poultry. Individual egg production varies within very broad limits, being determined partially by the functioning of the reproductive tract in females (under neuro-hormonal control and strongly influenced by outer environmental conditions). Besides all this, the number of eggs is also influenced by other factors.