Effect of weight and strain on the egg component utilization and embryonic weight during incubation

The study was conducted to determine the of egg size on egg components utilization embryonic weight during incubation of Black (DB) and Yaffa Brown (YB) strains pullet eggs. A total of 810 hatching pullet eggs(405 eggs per strain) were grouped into three egg (small, medium and large) per strain resulting six treatment groups which were replicated times with 45 eggs per replicate. Two eggs replicate were used to determine the, albumen and yolk weight on each of days 1, 7, 10, 15, and 18 of incubation resulting a total of 180 eggs. Data obtained were to analysis of variance in a 2 x 3 factorial layout. Results revealed a significant(p<0.05) increase in albumen percentage as egg increased (r = 0.93) in both strains before. The albumen weight decreased steadily zero from day 1 till the end of incubation while rate of yolk weight did not show the same. The ranged values of albumen percentage large, medium and small eggs were; 58.89 ±10.78 to 1.75 ± 0.56, 56.83 ± 0.55 to 0.61 ± 0.28 and54.04 ± 1.81 to 5.42 ± 0.89, respectively. At 18 th, the embryonic weights of both medium and-sized eggs (28.56 and 28.80 g, respectively) significantly (p<0.05) higher than small-sized (22.54). It could be concluded that the rate of utilization during incubation influenced embryonic weight (r = –0.97). Also the high of yolk when compared with that of towards the end of incubation in the three could result from the need for energy and by the developing embryo after hatching access to any feed