自然世界中选择性收获的生物经济模型(Ⅰ)(英文)

Bioeconomic modelling of selective harvesting in the natural world(Ⅰ)

摘要: 建立了一个具阶段结构和竞争关系的两种群生物经济模型 ,分别获得了一个或两个种群绝灭和两种群持久生存的充分必要条件 .同时也获得了保持生态环境持续发展的最优收策略和收获成年种群的阈值

Abstract: In this paper,we establish a mathematical model of two species with stage structure and competitive relation,obtain the necessary and sufficient condition for the permanence of two species and the extinction of one species or two species.We also obtain the optimal harvesting policy and the critical situations of harvesting for the sustainable development.