Figure 4

Numerical simulations of the solutions for system (17) and the corresponding deterministic system (2), when \(\mathcal {R}_{0}^{s}<1\) with \(a=0.19\), \(\mu=0.6\), \(\alpha=0.1\), \(c=0.3\), \(K=1\), \(\delta=0.4\), \(r=1\), \(\sigma_{1}=0.001\), \(\sigma_{2}=0.1\), and \(\tau_{1}=\tau _{2}=0.1\). The large scale of white noises may lead to no surviving predator individuals that can reproduce and create a new generation; while the deterministic one is survival