为了保护鱼类资源不受破坏并能持续地获得最大捕鱼量根据种群增长的s型曲线应使被捕鱼群的种群数量保持在k/2水平这是因为在这个水平上 Template




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tomski为了保护鱼类资源不受破坏并能持续地获得最大捕鱼量根据种群增长的s型曲线应使被捕鱼群的种群数量保持在k/2水平这是因为在这个水平上 coloring