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Dynamical analysis and optimal harvesting of a stochastic three species cooperative system with delays and Lévy jumps

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Figure

Figure 1 System (series of1.2) is permanent with σ1 = σ2 = σ3 = 0.1, γ1(u) = 0.2, γ2(u) = 1, γ3(u) = 3
Figure 2 System (1.2) is stochastically permanent when γ1(u) = 0.2, γ2(u) = 1, γ3(u) = 3
Figure 5 The MESY Y∗ = 0.2165 of (1.2) when σ1 = σ2 = σ3 = 0.1, γ1(u) = 0.2, γ2(u) = 1, γ3(u) = 3
Figure 6 x1 dies out while x2 and x3 persist when γ1(u) = 1.4, γ2(u) = 1, γ3(u) = 3, and the other parametersare the same as those for Fig
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