Stability Analysis of a Population Model with Maturation Delay and Ricker Birth Function

Figure 2

The regions corresponding to stability of equilibria 𝑁=0 and 𝑁=𝑁^∗ for the given 𝜏, where 𝑙₁ represents the curve 𝑑₁=ln𝑏/𝜏, 𝑙₂ represents the curve 𝑑₁=(ln𝑏−1+sec𝜔₁)/𝜏, 𝑏₁=1, and 𝑏₂=exp(1−sec𝜔₁).