Abstract
This paper studies a prey-predator singular bioeconomic system with time delay and diffusion, which is described by differential-algebraic equations. For this system without diffusion, there exist three bifurcation phenomena: Transcritical bifurcation, singularity induced bifurcation, and Hopf bifurcation. Compared with other biological systems described by differential equations, singularity induced bifurcation only occurs in singular system and usually links with the expansion of population. When the diffusion is present, it is shown that the positive equilibrium point loses its stability at some critical values of diffusion rate and periodic oscillations occur due to the increase of time delay. Furthermore, numerical simulations illustrate the effectiveness of results and the related biological implications are discussed.
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This work was supported by the National Science Foundation of China under Grant No. 60974004 and Natural Science Foundation of China under Grant No. 60904009.
This paper was recommended for publication by Editor Jinhu LÜ.
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Zhang, Q., Zhang, X. & Liu, C. A singular bioeconomic model with diffusion and time delay. J Syst Sci Complex 24, 277–290 (2011). https://doi.org/10.1007/s11424-010-8067-z
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DOI: https://doi.org/10.1007/s11424-010-8067-z