Fluctuations and correlations in an individual-based model of biological coevolution

Abstract

We extend our study of a simple model of biological coevolution to its statistical properties. Staring with a complete description in terms of a master equation, we provide its relation to the deterministic evolution equations used in previous investigations. The stationary states of the mutationless model are generally well approximated by Gaussian distributions, so that the fluctuations and correlations of the populations can be computed analytically. Several specific cases are studied by Monte Carlo simulations, and there is excellent agreement between the data and the theoretical predictions.

arXiv comment25 pages, 2 figures

References in corpus (5)

• Biological Evolution and Statistical Physics
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• The Tangled Nature model as an evolving quasi-species model
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• Fluctuations and correlations in population models with age structure

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