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