Abstract
We present the results of simulations in an individual-based model describing spatial movement and predator-prey interaction within a closed rectangular habitat. Movement of each individual animal is determined by local conditions only, so any collective behavior emerges owing to self-organization. It is shown that the pursuit of prey by predators entails predator interference, manifesting itself at the population level as the dependency of the trophic function (individual ration) on predator abundance. The stabilizing effect of predator interference on the dynamics of a predator-prey system is discussed. Inclusion of prey evasion induces apparent cooperation of predators and further alters the functional response, giving rise to a strong Allee effect, with extinction of the predator population upon dropping below critical numbers. Thus, we propose a simple mechanistic interpretation of important but still poorly understood behavioral phenomena that underlie the functioning of natural trophic systems.
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Original Russian Text © Yu.V. Tyutyunov, L.I. Titova, S.V. Berdnikov, 2013, published in Biofizika, 2013, Vol. 58, No. 2, pp. 349–356.
The text and presentation have been additionally amended for the English version. A.G.
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Tyutyunov, Y.V., Titova, L.I. & Berdnikov, S.V. A mechanistic model for interference and Allee effect in the predator population. BIOPHYSICS 58, 258–264 (2013). https://doi.org/10.1134/S000635091302022X
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DOI: https://doi.org/10.1134/S000635091302022X