title: Native intra- and inter-specific reactions may cause the paradox of pest control with harvesting.
abstract: We analyse a general time-discrete mathematical model of host-parasite population dynamics with harvesting, in which the host can be regarded as a pest. We harvest a portion of the host population at a moment in each year. Our model involves the density effect on the host population. We investigate the condition in which the harvesting of the host results in a paradoxical increase of its equilibrium population size. Our results imply that for a family of pest-enemy systems, the paradox of pest control could be caused essentially by the interspecific relationship and the intraspecific density effect.
authors.affiliation: Department of Mathematical and Life Sciences, Graduate School of Science, Hiroshima University, Higashi-hiroshima, 739-8526, Japan. seno@math.sci.hiroshima-u.ac.jp
authors.forename: Hiromi
authors.initials: H
authors.lastname: Seno
mesh_terms: D000383:Agriculture; D006790:Host-Parasite Interactions; D008954:Models, Biological; D010571:Pest Control; D013045:Species Specificity