艾里克湖水质生物学评价及鲢鳙鱼产力评估

Biological Assessment of Water Quality and Production Estimation of Hypophthalmichthys molitrix and Aristichthys nobilis in Alice Lake

2018年5、7和9月对艾里克湖水体理化性状、浮游生物量及湖区渔业发展开展调查,评估鲢鳙鱼产力。结果表明,艾里克湖总溶解固体(TDS)含量各月份均值超过1 g/L;部分月份总氮(TN)浓度、总磷(TP)浓度及化学需氧量不符合地表水环境质量标准的Ⅲ类水标准。共监测到浮游植物6门109种,平均密度和平均生物量分别为2578.59×104 ind./L和16.27 mg/L;共采集到浮游动物4门39种,平均密度和平均生物量分别为8.20 ind./L和0.33 mg/L。根据浮游植物水质评价标准,艾里克湖为富营养类型。据浮游生物量估算,2018年艾里克湖渔业生产潜力为824.9 t/a。

In May,July and September of 2018,the physical and chemical properties of water body,plankton biomass and fishery development in Alice Lake were investigated.The productivity of Hypophthalmichthys molitrix and Aristichthys nobilis was evaluated.Monthly average of TDS content in Alice Lake was more than 1 g/L.Total nitrogen,total phosphorus concentrations and chemical oxygen demand in a few of months were not in accordance with the Class III water standard of surface water environmental quality standard.109 species of phytoplankton belonging to 6 phyla were detected.The average density and average biomass of phytoplankton were 2578.59×104 ind./L and 16.27 mg/L respectively.39 species of zooplankton belonging to 4 phyla were collected,and the average density and average biomass were 8.20 ind./L and 0.33 mg/L respectively.According to the water quality evaluation standard of phytoplankton,Alice Lake is an eutrophic type.According to the estimation of plankton biomass,the fishery production potential of Alice Lake in 2018 was 824.9 t/a.