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对汤河水库的浮游生物和底栖生物的种类和生物量进行调查 ,得出浮游生物的存在量及其季节变化 ,从而对鲢鳙生产潜力进行估算
The species and biomass of plankton and benthic organisms in the Tanghe Reservoir were surveyed to find the presence of plankton and their seasonal variations so as to estimate the potential productivity of silver and bighead carp