Figure 6
From: Optimal control problem arises from illegal poaching of southern white rhino mathematical model
The effects of the changes in parameters p and \(h^{*}\). The red curve (stable to \(\mathcal{E}_{3}\)) represents that the proportion of hunted rhino being left alive is \(p=0.2\) with no intervention or no hunters being arrested \((h=0)\), the blue curve (stable to \(\mathcal{E}_{2}\)) represents the proportion of \(p=0.9\) and \(h=0\), and the black curve (stable to \(\mathcal{E}_{2}\)) indicates that the proportion is \(p=0.2\) and the intervention is carried out with constant rate \(h^{*} = 0.4\)