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本文利用初级生产力和饵料基础2种方法对汤河水库鱼产力进行了评估,结果表明:初级生产力评估汤河水库鲢、鳙鱼产力达522.460t;饵料基础法评估鱼产力为595.960t。平均鱼产力可达约559.000t,比汤河水库实际产量要高,说明水库的鱼产力还有较大的上升空间。另外,通过与以往材料的对比发现,汤河水库浮游生物的生物量有明显的增加,说明汤河水库水体营养水平有升高趋势,水库水质状况需加以注意。对汤河水库鱼产力进行正确评估,科学指导渔业生产,对实现“保水渔业”意义重大。
In this paper, two methods of primary productivity and bait were used to evaluate the fish productivity in Tanghe Reservoir. The results showed that the productivity of silver carp and bighead carp reached up to 522.460t in the primary productivity assessment of Tanghe Reservoir, and the fish yield was estimated to be 595.960t . The average fish productivity can reach about 559.000t, which is higher than the actual output of Tanghe Reservoir, indicating that there is still much room for increase in fish productivity of the reservoir. In addition, compared with the previous materials, we found that the biomass of plankton in Tanghe Reservoir increased obviously, indicating that the nutrient level of Tanghe Reservoir has been increasing, and the water quality of reservoir should be paid attention to. Correctly assessing fish productivity in Tanghe Reservoir and scientifically guiding fishery production are of great significance in realizing “water-holding fishery”.