南海北部海域经济鱼类的重金属含量与分布研究

研究了南海北部海域经济鱼类的重金属Ｃｕ、Ｐｂ、Ｚｎ、Ｃｄ、Ｃｒ和Ｎｉ等的含量与分布。结果表明，重金属在鱼体不同器官组织中的分布是不均衡的，肌肉中的重金属含量最低；底层鱼类的重金属含量相对较高；肉食性鱼类的Ｃｄ含量较高，但其余５种金属含量与鱼类食性的关系不明显；近海鱼类的重金属含量与河口咸淡水鱼类的重金属含量之间无显著差异；经济鱼类受重金属污染的影响不明显，其食用价值尚未受影响。

STUDIES ON HEAVY METALS IN COMMERTCIAL FISHES FROM THE NORTHERN PART SOUTH CHINA SEA

Distributions of Cu,Pb,Zn,Cd,Cr and Ni in tissues of the commercial fish taken from the northern part South China Sea were studieThe relations between heavy metal concentrations in fish and its living habits,living environment have been analyzed. Levels of heavy metals in fish have been evaluated as well. There were significant differences of heavy metal levels in different parts of tissues;levels of heavy metals in muscle tissue being lowest.The Cd concentration of carnivorous fish was much higher than that of the other taxa. Heavy metal levels of demersal fishes were higher than those of other fishes. There was no significant difference in heavy metal concentrations between fish living in estuary area and those fishes living in off shore area. Commercial fish in the northern part South China Sea have not been affected significantly by heavy metals and their eating value has not been affected yet.