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Email this article Effect of Egg Weight and egg Shell Thickness on Hatchability and Embryonic Mortality of Cobb Broiler Breeder Eggs
Abstract
Hatchability is a trait of major economic importance in the broiler industry because it has a strong effect on chick output. In this experiment nine hundred hatching eggs were used was to study the effect of egg weight and egg shell thickness on hatchability. The results demonstrated that fertility and hatchability percentage of total eggs were significantly (P<0.05) affected by egg weight. The hatchability was increased on small sized egg by 7% and on medium and large egg by 11%. However, hatchability and embryonic mortality of fertile eggs were not significantly (P>0.05) affected by egg weight. Egg shell thickness had no significant (P>0.05) effect on hatchability and embryonic mortality. Medium and large egg weight adversely affected hatchability. The increase of egg weight above 65 to 69g is accompanied by a decrease in hatchability. Based on the result of this study it was concluded that egg weight has clear effect on hatchability. Hatchability and embryonic mortality were not affected by egg shell thickness.
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