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Pursuit-evasion predator-prey waves in two spatial dimensions | | V. N. Biktashev
; J. Brindley
; A. V. Holden
; M. A. Tsyganov
; | | Date: |
8 Jun 2004 | | Subject: | Pattern Formation and Solitons; Chaotic Dynamics; Populations and Evolution | nlin.PS nlin.CD q-bio.PE | | Abstract: | We consider a spatially distributed population dynamics model with excitable predator-prey dynamics, where species propagate in space due to their taxis with respect to each other’s gradient in addition to, or instead of, their diffusive spread. Earlier, we have described new phenomena in this model in one spatial dimension, not found in analogous systems without taxis: reflecting and self-splitting waves. Here we identify new phenomena in two spatial dimensions: unusual patterns of meander of spirals, partial reflection of waves, swelling wavetips, attachment of free wave ends to wave backs, and as a result, a novel mechanism of self-supporting complicated spatio-temporal activity, unknown in reaction-diffusion population models. | | Source: | arXiv, nlin.PS/0406012 | | Services: | Forum | Review | PDF | Favorites | |
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