Figure 8From: Periodic solution and control optimization of a prey-predator model with two types of harvesting Numerical simulations in the case \(\pmb{x_{E_{1}}< h<(1-p_{h})h+\tau_{h} <x_{E_{2}}}\). (a) Phase portrait of prey fish density and predator fish density on \(h=4\). (b) Time series of prey fish density. (c) Time series of predator fish density.Back to article page