Theoretical Biology and Ecology Modelling Group, Hungarian Academy of Sciences and Eötvös Loránd University, Pázmány Péter Sétány 1/c. H-1117 Budapest, Hungary. miklosi@ramet.elte.hu|Theoretical Biology and Ecology Modelling Group, Hungarian Academy of Sciences and Eötvös Loránd University, Pázmány Péter Sétány 1/c. H-1117 Budapest, Hungary. miklosi@ramet.elte.hu|Theoretical Biology and Ecology Modelling Group, Hungarian Academy of Sciences and Eötvös Loránd University, Pázmány Péter Sétány 1/c. H-1117 Budapest, Hungary. miklosi@ramet.elte.hu