The optimal harvesting policy of the single specie was studied with age distribution when two stages were harvested respectively. From this theory, it was significant to protect our ecology system.

• 利用最优捕获策略的理论,研究一个具有年龄结构的单种群模型,获得了其幼年种群和成年种群捕获的优化理论。由此来探讨保护生态系统的重要意义。