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arXiv · 1511.07498

Finite time Blow up in a population model with competitive interference and time delay

Rana D. Parshad·Suman Bhowmick·Emmanuel Quansah·Rashmi Agrawal·Ranjit Kumar Upadhyay
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Abstract

In the current manuscript, an attempt has been made to understand the dynamics of a time-delayed predator-prey system with modified Leslie-Gower and Beddington-DeAngelis type functional responses for large initial data. In \cite{RK15}, we have seen that the model does possess globally bounded solutions, for small initial conditions, under certain parametric restrictions. Here, we show that actually solutions to this model system can blow-up in finite time, for large initial condition, \emph{even} under the parametric restrictions derived in \cite{RK15}. We prove blow-up in the delayed model, as well as the non delayed model, providing sufficient conditions on the largeness of data, required for finite time blow-up. Numerical simulations show, that actually the initial data does not have to be very large, to induce blow-up. The spatially explicit system is seen to possess Turing instability. We have also studied Hopf-bifurcation direction in the spatial system, as well as stability of the spatial Hopf-bifurcation using the central manifold theorem and normal form theory.

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Rana D. Parshad, Suman Bhowmick, Emmanuel Quansah, Rashmi Agrawal, Ranjit Kumar Upadhyay. 2015-11-23. Finite time Blow up in a population model with competitive interference and time delay. https://arxiv.org/abs/1511.07498

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