Figure 3.

Parental care that increases that increases the time spent in the egg stage but has no effect on time spent in the juvenile stage will not be favored at high (A) or low (B) egg death rates. Parental care that decreases the time spent in the egg stage but has no effect on juvenile time will be favored when egg death rate is high (C) but not when it is low (D). Care that both increases egg survival and increases time spent in the egg stage (but has no effect on juvenile time) will not be favored at high (E) or low (F) egg death rates. Care that increases egg survival and decreases time spent in the egg stage (but has no effect on juvenile time) will be favored when egg death rate is high (G) but not when it is low (H). Unless otherwise noted, r₀ = r_m0, d_A0 = d_Am0 = 0.5, K = K_m, τ_E0 = τ_Em0 = 5, τ_J0 = τ_Jm0 = 5, c = 0.4, d_J0 = d_Jm0, d_E0 = d_Em0. High egg death rate: d_Em0 = 0.9; low egg death rate: d_Em0 = 0.1