title: Chasing and escaping by three groups of species.
abstract: We study group chasing and escaping between three species. In our model, one species acts as a group of chasers for another species and acts as a group of targets for the third species. When a particle is caught by a target, the particle becomes a new chaser. Although the ratio of three species is changed, the total number of particles is conserved. When particles move randomly, the numbers of the three species change periodically but no species seems to become extinct. If particles escape from the nearest chaser and chase the nearest target, the extinction of a species occurs. The extinction induces that of the second species and finally only one species survives.
authors.affiliation: Information Media Center, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan. sato@cs.kanazawa-u.ac.jp
authors.forename: Masahide
authors.initials: M
authors.lastname: Sato
mesh_terms: D000818:Animals; D003198:Computer Simulation; D004924:Escape Reaction / Q000502:physiology*; D006801:Humans; D008954:Models, Biological; D011157:Population Dynamics; D011235:Predatory Behavior / Q000502:physiology*