Finite time Blow up in a population model with competitive interference and time delay
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.
Keywords
Cite
@article{arxiv.1511.07498,
title = {Finite time Blow up in a population model with competitive interference and time delay},
author = {Rana D. Parshad and Suman Bhowmick and Emmanuel Quansah and Rashmi Agrawal and Ranjit Kumar Upadhyay},
journal= {arXiv preprint arXiv:1511.07498},
year = {2015}
}