期刊名称：Journal of Natural and Environmental Sciences
印刷版ISSN：1309-7474
出版年度：2012
卷号：3
期号：1
页码：1-8
语种：English
出版社：Journal of Natural and Environmental Sciences
摘要：The most common heavy metals detected in surface water of Shah Alam River are arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu), nickel (Ni), lead (Pb), mercury (Hg) and Zinc (Zn). The purpose of this study was to investigate the levels and pattern of heavy metal (Cu, Pb, Mn, and Zn) concentration in three fish species of Shah Alam River. Selected heavy metals were assayed in sampled fish gills, muscles and liver tissues, using an atomic absorption (AA) spectrophotometer. The results are expressed in µg/g. The order of heavy metal concentration was; Liver ≥ gills> muscles. In all selected fish species, Cu and Zn were detected in higher concentrations, followed by Mn. Pb was only detectable in liver of all fish species. Most detected metal concentrations were negatively correlated with the fish (intraspecie) body weight except for Zn which exhibited a positive correlation. Pb could only be detected in younger individuals of all given species. The body burden of heavy metal seems to decrease as fish ages and grows in size. Likewise, the interspecies total body metal concentration decreased with increasing size and vice versa indicating that smaller species in an aquatic ecosystem are more prone to metal accumulation than the larger species. Positive correlation in case of Zn and Mn could be due to their higher concentrations in water. Although most metal concentrations were not elevated and were below the Food and Agriculture Organization (FAO) limits for corresponding metals in fish body, the levels of Pb were higher than the FAO set limits.
关键词：Bioaccumulation, Body burden, Contamination, Interspecie, Intraspecie
