Figure 7.

The complete model is described above. MEI = metabolizable energy intake; M, V, W are protein pools representing nonvisceral (M), viscera (V), and wool (W) depots, respectively, and F is the fat pool. The solid arrows represent mass and energy flows and the dotted arrows loss of energy as heat. All fluxes are MJ/d. The equations which describe this model are:

NEG = MEI – HP;

HP = FHP + HrE + HAF;

dm/dt = (p_m × NEG + e₀) × (1 − m/m*);

dv/dt = p_vx (v* − v);

v* = C_MEI × MEI + C_m × (m^0.41) − C_MD × M/D;

dw/dt = fn(dw/dt_(t−1)^t, W_Br^t, W_z, MEI);

dP/dt = ∑(dm/dt + dv/dt + dw/dt);

dF/dt = NEG – dm/dt − dv/dt − dw/dt;

FHP = b_m × m + b_v × v;

HrE = b_p × dP/dt + b_f × dF/dt;

HAF = b_MEI * MEI.

The values of each parameter are shown in Table 2.