Table 2.
Equations of growth curve functions for Korean indigenous chicken

Functions	Equations1)
Gompertz	y t = α ⋅ e − β ⋅ e − γ ⋅ t
Von Bertalanffy	yt = α(1-β·e−γ·t)3
Logistic	yt = α(1-β·e−γ·t)−1

Y_t is the corresponding weight at time t; 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, a constant scale that is proportional to the overall growth rate(wk).