Fig 3. Establishment of linear regression lines between incubation time and embryonic crown-tail length (ECTL).

The rates of embryo growth in Brown Tsaiya Ducks (blue dot line; y = 0.107x - 2.2185, R² = 0.9522) and Taiwan Country Chicken (red dot line; y = 0.1486x - 2.8836, R² = 0.9269) can be accurately predicted by each own regression line. Values are presented as mean ± SD in both species.