We evaluated the level of heavy metal pollution in ten species of teleosts from the rare and endemic fishes nature reserve in the upper reaches of the Yangtze River in 2008-2009 using atomic absorption spectropho-tometry and atomic spectrophotofluorimetry. The mean muscle concentrations of heavy metals (Cu, Zn, Pb, Cd, Hg, and As) in the ten species were within the range of 0.39-1.17 mg/kg, 29.83-38.68 mg/kg, 0.03-0.64 mg/kg, 0.015-0.042 mg/kg, 0.015-0.074 mg/kg, and 0.031-0.077 mg/kg (wet weight), respectively. The heavy metal concentrations were below the tolerance limit levels established by the ministry of health of China, with the exception of Pb in S. Skneri. The concentrations of Pb were higher than the acceptable values for human consumption designated by FAO in six of the ten fish species. Our results suggest that heavy metal concentrations were higher in carnivorous species than in omnivorous fish. The heavy metals pollution index in the muscle of fishes was <0.5. We found no evidence of appreciable pollution in fishes from this study area. Our results provide insight into the health of fish resources in this area and can be used for decision-making regarding environmental management and the protection of endangered species.%于2008-2009年在长江上游珍稀、特有鱼类国家级自然保护区范围内采集了10种鱼样,分别使用原子吸收分光光度法测定鱼体肌肉内Cu、Zn、Pb、Cd的含量,原子荧光分光光度法测定Hg、As的含量,用以评价保护区内鱼体肌肉重金属的污染状况和食品安全.6种重金属元素在不同鱼类肌肉中残留范围分别为0.39～1.17 mg/kg、29.83～38.68mg/kg、0.03～0.64 mg/kg、0.015～0.042 mg/kg、0.015～0.074 mg/kg和0.031～0.077 mg/kg(湿重).除了大眼鳜(Siniperca kneri)肌肉内Pb含量超出国家食品中重金属限量卫生标准外,其他鱼类肌肉中的重金属元素均低于限量标准.但根据联合国粮农组织提供的标准,有6种鱼体肌肉内的Pb含量超标.研究结果显示,肉食性鱼类肌肉中的重金属含量高于杂食性鱼类,各种鱼类肌肉重金属综合污染指数均低于0.5,属于微污染和轻污染程度,保护区范围内的鱼类没有受到明显的重金属污染.本研究结果反映了保护区内鱼类重金属的污染状况,对于该区域的生态环境管理与鱼类资源保护措施的制定提供了参考依据.
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