作者: Antti-Juhani Pekkarinen , Jouko Kumpula , Olli Tahvonen
DOI: 10.1016/J.ECOLMODEL.2015.05.030
关键词: Optimal foraging theory 、 Overgrazing 、 Habitat 、 Biology 、 Lichen 、 Biomass (ecology) 、 Pasture 、 Agronomy 、 Population 、 Mating system
摘要: We apply an age- and sex-structured reindeer-lichen model to examine the role of winter pastures, pasture rotation, supplementary feeding on economically optimal reindeer management. The includes 17 age classes females, 13 males a detailed description energy resource utilization by population. Reproduction is specified modified harmonic mean mating system diet choice between different resources follows principles foraging theory. Wintertime intake defines individual's weight decrease its consequences mortality reproduction. Lichen growth depends habitat type lichen biomass. decision variables are animals chosen for slaughter from each sex class amount food given. Results show that availability arboreal lichens, rate ground rotation all determine solutions. Reindeer management aiming maximize long-term net economic revenues leads very low densities if intensive becomes in steady state. Government subsidies promote herders base leading lower conditions depletion lichens.