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本文根据Robson-Chapman公式估算了清河水库鲢、鳙可捕群体的残存率,计算了非捕捞群体的残存率和种群生产量。清河水库非捕捞群体平均年残存率约为0.25,可捕群体的平均年残存率鲢为0.32、鳙为0.38。鲢、鳙鱼种群生产量分别为141和110kg/ha,种群年P/B系数分别为1.15和1.09。鲢、鳙鱼获量仅为其生产量的33％和34％,库存生物量的36％。
Based on the Robson-Chapman formula, the residual rates of silver carp and silver clam in Qinghe reservoir were estimated, and the residual rate and population production of non-fishing groups were calculated. The average annual residual rate of non-fishing population of Qinghe Reservoir is about 0.25, and the average annual residual rate of silver and silver of the catchable population is 0.32 and 0.38 respectively. The production of silver carp and bighead carp were 141 and 110kg / ha respectively, and the annual P / B coefficients were 1.15 and 1.09 respectively. Silver carp and bighead carp catch only accounted for 33% and 34% of their production and 36% of their stocks.