4.5 Article

Cross-diffusion induced spatiotemporal patterns in a predator-prey model with herd behavior

Journal

NONLINEAR ANALYSIS-REAL WORLD APPLICATIONS
Volume 24, Issue -, Pages 36-49

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.nonrwa.2014.12.006

Keywords

Predator-prey model; Herd behavior; Cross-diffusion; Turing instability; Amplitude equations; Spatiotemporal pattern

Funding

  1. Shanghai Committee of Science and Technology [13ZR1444500]
  2. Program for New Century Excellent Talents in University [NCET-11-0385]

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In this paper, we investigate the phenomena of pattern formation for a predator-prey model with herd behavior and cross-diffusion. We give the conditions for cross-diffusion induced instability in detail, and have derived amplitude equations for the excited modes. Furthermore, we illustrate the spatial patterns via numerical simulations, which show that the model dynamics exhibits complex pattern replication: spotted pattern, stripe pattern, and coexistence of the two by increasing the control parameter beta and cross-diffusion coefficient d(21) respectively. Meanwhile, we also obtain the other patterns: labyrinth patterns and black-eye patterns. These results indicate that the cross-diffusion plays an important role in the pattern selection. The spatiotemporal patterns induced by cross-diffusion may enrich the pattern dynamics for diffusive predator-prey model and be helpful for the biologists to understand the phenomenon in which a flux of one species is induced by a gradient of another species. (C) 2015 Elsevier Ltd. All rights reserved.

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