Figure 4.

(a) The trophic efficiency $\overline{{ϵ}_{\text{T}}}$ and (b) the average growth efficiency ϵ_I as functions of the predator–prey mass ratio β drawn using the values of the parameters from table 1 (thick lines). The grey areas are the valid ranges defined by the upper and lower limits of the exponents n and q. The upper limits are calculated using an assimilation efficiency of 0.5.The dashed vertical lines are drawn at the value of the predator–prey mass ratio β=100.