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Dynamics and pattern formation in a cross-diffusion model with stage structure for predators

  • * Corresponding author: Jinfeng Wang

    * Corresponding author: Jinfeng Wang 

Partially supported by National NSFC grant 11971135, NSFH grant LH2019A017, LH2020A019 and 2018-KYYWF-0999

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  • This paper is concerned with a predator-prey model with stage structure for the predator, with a cross-diffusion term modeling the effect that mature predators move toward the direction of gradient of prey. It is first shown that the corresponding Neumann initial-boundary value problem in an $ n $-dimensional bounded smooth domain possesses a unique global classical solution which is uniformly-in-time bounded for the weak cross-diffusion. It is further shown that, in the presence of cross-diffusion, the model admits threshold-type dynamics in terms of the cross-diffusion coefficient; that is, the homogenous steady state keeps stability for weak attractive prey-taxis, while the stationary patterns will occur for strong attractive prey-taxis. This implies that such cross diffusion does contribute to the rich dynamics of predator-prey model with stage structure for predators.

    Mathematics Subject Classification: Primary: 35K57; Secondary: 35K59.

    Citation:

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  • Figure 1.  Change of $ \chi_i $ with non-negative integer $ i $

    Figure 2.  $ (\tilde{u}_1,\tilde{u}_2,\tilde{v}) $ is asymptotically stable for $ \chi = 0 $

    Figure 3.  $ (\tilde{u}_1,\tilde{u}_2,\tilde{v}) $ remains stable for $ \chi = 200<\hat{\chi} $

    Figure 4.  Spatial heterogenous and time-periodic patterns for $ \chi = 308>\hat{\chi} $

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