Abstract：
The Itezhi-tezhi Dam on the Kafue River in Zambia is a major capture fishery. However, the upstream reaches of the Kafue River receive effluents from copper mines. It was unclear whether fish health in the dam is adversely affected due to the mining effluents. We investigated the health status of fish in Itezhi-tezh Dam using a histology-based fish health assessment protocol with Oreochromis andersonii as a bioindicator. Fish were sampled in the Itezhi-tezh Dam and at a reference site further upstream on the Kafue River before it enters the mining region. Metal bioaccumulation, biometric indices and histological alterations in the gills, gonads, hearts, kidneys and livers were assessed. The findings revealed significantly higher copper and selenium sediment concentrations (p = 0.02843 and p = 0.02107 respectively), bioaccumulation of copper and selenium, and increased histological alterations in the gills, kidneys and livers of fish in the Itezhi-tezhi Dam.
摘要：
赞比亚卡富河上的伊特智-泰智水坝是主要的捕捞渔业。然而,Kafue河的上游河段接收铜矿的废水。尚不清楚大坝中的鱼类健康是否因采矿废水而受到不利影响。我们使用基于组织学的鱼类健康评估方案，以Oreochromisandersonii作为生物指示剂，调查了Itezhi-tezh大坝中鱼类的健康状况。在进入矿区之前，在Itezhi-tezh大坝和Kafue河上游的参考地点对鱼类进行了采样。金属生物累积，生物特征指数和ill的组织学改变，性腺,心,评估肾脏和肝脏.研究结果表明，铜和硒沉积物浓度显着升高（分别为p=0.02843和p=0.02107），铜和硒的生物积累，增加了ill的组织学改变，伊特智大坝中鱼的肾脏和肝脏。
