Egg-shape data of six species of poultry

We digitized the side profiles of 2221 eggs of six species of poultry, two species of Anatidae (Anas platyrhynchos domesticus and Anser cygnoides domesticus) and four species of Phasianidae (Alectoris chukar domesticus, Coturnix japonica domesticus, Gallus gallus domesticus, and Phasianus colchicus domesticus), and used an explicit re-expression of Preston’s equation (referred to as EPE hereinafter) to fit the planar coordinates of each egg profile. By using the estimated parameters, we calculated the volume and surface area of each egg. The black_white.rar file saves the black and white .bmp images at 600 dpi for the 2221 egg profiles. The edge_data.zip file includes the planar coordinates (in cm) of each of the 2221 egg profiles, and the EPE.csv file includes the estimated parameters and goodness-of-fit of the EPE, and the egg surface area and volume calculated by the surface area and volume equations of the solid of revolution based on the EPE for each egg. In addition, the EPE.csv f..., We selected six species of poultry for study because of the availability in large numbers of their eggs: two species of Anatidae (Anas platyrhynchos domesticus and Anser cygnoides domesticus), and four species of Phasianidae (Alectoris chukar domesticus, Coturnix japonica domesticus, Gallus gallus domesticus, and Phasianus colchicus domesticus). For each species, 351−390 eggs were selected for detailed study. We used an adjustable tabletop phone-mount to hold a smartphone (Huawei P30Pro, Huawei, Dongguan, China) to photograph eggs of A. platyrhynchos, A. cygnoides, C. japonica, and G. gallus, and another smartphone (Redmi K40S, Xiaomi, Kunshan, China) to photograph eggs of A. chukar and P. colchicus. Over 2200 eggs (2221 in total, >360 of each of the six species on average) were photographed at a constant scale to determine the representative 2-D egg-profiles of each species. To focus the camera on the center of each egg, we estimated the midpoint of the length of each profile. In ad...,