Volume 42 Issue 10
Oct.  2016
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LI Ya, HU Hanyan, LIN Junyiet al. Qualitative analysis of a food chain model with alternative prey[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(10): 2075-2081. doi: 10.13700/j.bh.1001-5965.2015.0642(in Chinese)
Citation: LI Ya, HU Hanyan, LIN Junyiet al. Qualitative analysis of a food chain model with alternative prey[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(10): 2075-2081. doi: 10.13700/j.bh.1001-5965.2015.0642(in Chinese)

Qualitative analysis of a food chain model with alternative prey

doi: 10.13700/j.bh.1001-5965.2015.0642
Funds:  the Fundamental Research Funds for the Central Universities (30361201,30458701)
  • Received Date: 28 Sep 2015
  • Publish Date: 20 Oct 2016
  • Studies in ecology show that alternative prey has important effects on predator-prey system in the aspects of system stability, species persistence, etc. For species at the intermediate level of a food chain, they are prey of top predators, while predating the bottom prey at the same time. Therefore, the effect of changes in intermediate predators' population on the system cannot be ignored. We set up a three-dimensional food chain model composed of top predator, intermediate predator and prey, assuming that the intermediate predator had alternative choice of prey. The existence and stability of the equilibria were derived through dynamical study of the system. The existence of Hopf bifurcation was explored in depth. The numerical simulations used the prey choice parameter as the bifurcation variable to study the possible Hopf bifurcations. The effect of alternative prey on the stability of the food chain system was derived through the theoretical and numerical results.

     

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