Figure 1

The positive equilibrium state \(E_{3}\) of (4) is locally asymptotically mean square stable based on 50 trajectories of (4) with the initial condition \((u_{1}, u_{2})=(0.5,0.8)\), where \(a_{11}=2\), \(a_{12}=3/8\), \(a_{21} =a_{22}=1\), \(r_{1}=0.5\), \(r_{2}=3\), and \(h=0.1\)