南海北部海域经济水产品的重金属污染及其评价

调查研究了南海北部海域鱼类、是类、蟹类、头足类和双壳类等５大类经济水产品中的Ｃｕ、Ｐｂ、Ｚｎ、Ｃｄ、Ｃｒ和Ｎｉ。研究结果表明，各类生物的重金属含量差异显著，重金属在鱼虾不同器官组织中的分布是不均衡的。鱼类的重金属含量与其栖息水层有关；除肉食性鱼类的Ｃｄ含量较高小，不同食性鱼类重金属含量间的差异不显著；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；鱼类重金属含量的季节变化不明显。游

Pollution and Evaluation of Heavy Metals in the Seafoods from the Northern Area of the South China Sea

The concentrations of Cu,Pb,Zn,Cd,Cr and Ni in commercial fishes,shrimps,crabs,cephalopods and bivalve molluscs collected from the northern area of the South China Sea were determined.The results show that the contents of the heavy metals in various lives are quitedifferent.The distribution of the heavy metals in various organs of the fishes and shrimps are not proportionate,The contents of the heavy metals in the fishes have a relation with the habitat lay-er. The contents of the heavy metals in the fishes of various feeding habits are not markedly dif-ferent,except the higher content of Cd in the carnivorous fish.The contents of the heavy metalsin the fisheds between inshore and estuary are not obviously different.The seasonal changes ofthe content of the heavv metals in the fishes are not distinct.The economic swim-species have notbeen obviously polluted by the heavy metals,it is basically in good state. No significant effect hasbeen found on the edible value.