Abstract
Routine observations on the growth of chickens from a flock of Brown Leghorns maintained at this Institute indicated that factors, apparently closely associated with season of the year, caused considerable variations in the rate of growth. It is possible to conceive of two distinct means by which seasonal factors may produce their effect (1) directly on the growing chick, or (2) indirectly in that their influence may be exerted on the hen and transmitted to the egg from which the chick subsequently develops; either or both may contribute to the final variations obtained.
Publisher
Cambridge University Press (CUP)
Subject
General Medicine,General Chemistry
Reference9 articles.
1. “Seasonal Variation in Thyroid Size in Pigeons,”;Riddle;Amer. Journ. Physiol.,1925
2. STUDIES ON THYROIDS*
3. “An Experimental Study on the Effect of Thyroxin upon the Sexual Differentiation in the Fowl,”;Greenwood;Brit. Journ. Exp. Biol.,1928
4. “Štitná Žláza a Obdobi Nosnosti u Drůbeže,”;Podhradsky;Věst. Česk. Akad. Zeměd,1933
5. Egg Weight in Relation to Production
Cited by
16 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献