Effect of Hen Oviposition Time on some Egg Characteristics

Abstract

Ovulation in chicken is the process of emergence the egg yolk by controlling the steroid hormones, which is followed by oviposition that influence by several factors. Egg yolk is a huge oocyte contains fat in water emulsion with about 50% dry weight, its rounded and centrally located. The experiment was carried out to investigate the effect of oviposition time on egg external traits (egg weight, egg length, egg breadth), yolk characteristics (yolk weight, yolk high, yolk diameter, yolk index, and the proportion of yolk weight to egg whole weight), and investigate the correlations between these characteristics by using Ross 308 hybrid. When the flock was 30 weeks age, 150 fertilizes egg was used, which collected in three times, Period (1) = 9:30 am, Period (2) = 11:30 am, and Period (3) = 1:30 pm, which supplied from KOSAR company. The results reveal significant differences between the times of collection for all the yolk characteristics and egg external traits. It does conclude the yolk characteristics were differs significantly between the oviposition times and the yolk weight was highly correlated with yolk diameter, egg breadth, and proportion of yolk weight to the whole egg weight.

The physicochemical features of eggshell, thick albumen, amniotic fluid, and yolk during chicken embryogenesis

“…The egg-shape index in the presented study was, on average, 79.78%. Shaker et al (2019) showed an egg-shape index of 76.29 to 79.32%. Eggs were obtained from hens at the age of 30 wk.…”

Principal Component Analysis for the Egg Traits in Three Genetic Lines of Japanese Quail

“…In Japanese quail the egg weight was higher in the grey feather color line, intermediate in the brown feather color, and low in the white feather color [7]. Moreover the external egg traits were correlated significantly with age [8], Oviposition [9], genotype [10], species [11], environment [12], and the flock health. By using PCA, [1] was could to set the component affect the egg weight.…”

The Regression of Chukar Partridge (Alectoris chukar) Egg External Traits After One Generation of Inbreeding

“…External egg traits (Length, and breadth) play important roles for embryo growing [2], and chick survival. It's high correlated with species [3][4][5], genotype [6][7][8][9][10], age [7][8][9][10][11], oviposition time [12], and hen health. Also it defer between the birds in same species [13].…”