Table 2.
Estimated parameters of growth curve using three non-linear models in Korean native chicken
| Model | Parameter | R2 | Convergence property | Convergence weight | ||
|---|---|---|---|---|---|---|
|
| ||||||
| α±SE (g) | β±SE (wk) | γ±SE (wk) | ||||
| Gompertz | 2,798.9±76.2 | 3.562±0.04 | 0.102±0.003 | 99.55 | 2 | 48 |
| von Bertalanffy | 3,755.4±168.7 | 0.750±0.00 | 0.061±0.003 | 99.57 | 30 | 138 |
| Logistic | 2,076.3±27.5 | 16.09±0.41 | 0.222±0.004 | 99.45 | 1 | 3 |
α, asymptotic live body weight (g); β, the log-function for the proportion of the asymptotic mature weight to be gain after birth (wk); γ, constant scale that is proportional to the overall growth rate (wk); R2 is the coefficient of determination; Convergence properties can be defined as the number of chickens which the model is not converged; Convergence weight can be defined as the number of chickens for which the converged weight at 20 weeks of age is 5 times heavier than actual weight.