%0 Journal Article %T Monte Carlo Simulation of Age-Dependent Host-Parasite Relations %A Dietrich Stauffer %A Ana Proykova %A Karl-Heinz Lampe %J Quantitative Biology %D 2007 %I arXiv %R 10.1016/j.physa.2007.05.028 %X The death of a biological population is an extreme event which we investigate here for a host-parasitoid system. Our simulations using the Penna ageing model show how biological evolution can ``teach'' the parasitoids to avoid extinction by waiting for the right age of the host. We also show the dependence of extinction time on the population size. %U http://arxiv.org/abs/q-bio/0703045v1