Abstract
IT IS generally assumed that the rate of thyroid hormone secretion is an important factor in egg production. Such a relationship is indicated by the results of experiments with thyroactive substances (for review see Sturkie, 1954). Further, Booker and Sturkie (1950) reported that pullets laying four-egg sequences had higher thyroxine secretion rates than pullets laying two-egg sequences.The relationship between thyroid weight and body weight of growing chickens was studied by Schultze and Turner (1945) who found a positive correlation between the two characteristics. Booker and Sturkie (1950), on the other hand, stated that in mature birds of the same breed and age there is no close relationship between body weight and thyroid weight, if one is working within a narrow range of body weights.The effect of season on thyroid weight was studied by Cruickshank (1929), Podhradsky (1935), and Galpin (1938) who reported that the thyroids of chickens were …
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
