Volume and Surface Area Calculation based on Measurements of Egg Diameter, and Correlation with Other Inner and Outer Features for Three Purposes of Breeding Chickens

A completely randomized experimental design for the three purposes to use egg diameter for volume and surface area calculation, and correlation with other inner and outer features of breeding hens, was performed. Eggs from light breeds (3 554), heavy breeds (1 011), and turquino breeds (2 537), 2-3, 7-8, and 10-11 months of laying, respectively, were used (totaling 7 102 eggs). The values for volume calculation (Kv) were 0.531 and 0.527, for heavy and turquino breeds. The values for the surface area calculation (Ks) ranged between 2.885 and 2.866, for heavy and light breeds, respectively. The volumes achieved for heavy and turquino breeds were 52.46-57.11 mm3, respectively. Surface area ranged between 64.23 and 71.71 mm2. The yolk, white, and Haugh indexes showed significant differences (P < 0.05) for the three purposes, due to storage time before incubation. The results proved that the eggs studied for the three purposes of breeding chickens, generally have satisfactory inner and outer characteristics that guarantee incubation efficiency