HEAVY METAL ACCUMULATION PATTERNS IN TISSUES OF GUANGDONG BREAM (MEGALOBRAMA TERMINALIS) FROM THE PEARL RIVER, CHINA
文献类型: 外文期刊
作者: Zeng, Yanyi 1 ; Lai, Zini 1 ; Gu, Binhe 2 ; Yang, Wanling 1 ; Gao, Yuan 1 ; Wang, Chao 1 ; Li, Yuefei 1 ;
作者机构: 1.Chinese Acad Fishery Sci, Pearl River Fishery Res Inst, Guangzhou 510380, Guangdong, Peoples R China
2.Univ Florida, Dept Soil & Water, Gainesville, FL 32611 USA
关键词: Megalobrama terminalis;heavy metals;bioconcentration factor;health risk assessment;Pearl River
期刊名称:FRESENIUS ENVIRONMENTAL BULLETIN ( 影响因子:0.489; 五年影响因子:0.479 )
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收录情况: SCI
摘要: We examined the accumulation patterns of heavy metals in various body tissues of Guangdong bream Megalobrama terminalis from the Pearl River watershed. Concentrations of copper (Cu), zinc (Zn), lead (Pb), cadmium (Cd), iron (Fe) and manganese (Mn) in the fish muscle, gonads, intestines, gills, liver, kidneys and spine were measured by atomic absorption spectrophotometry. Concurrently, these metals were also determined in the surface water and sediment of the region. A metal bio-concentration factor (BCF) in distinct tissue types was calculated and the results showed that the highest BCF occurred for Cd in the kidney, implying that the kidney is the most sensitive tissue for the accumulation of Cd. Cu was greatly concentrated in the liver, while Pb and Zn were more concentrated in the spine than in all other tissues. In general, all of the studied metals accumulated in the muscle at a lower rate than in other tissues. All detected metals except for Mn, displayed significant correlations between the concentration in muscle and that of one or more other tissues. There was no statistically significant relationship observed between the metal content of tissues and the fish length or weight. The ratio of heavy metal concentrations in the gills/ intestines showed that the Cu and Cd burden in the fish may be greater from dietary uptake via the intestine rather than by uptake from the water column via the gills. The contribution of the other four metals may be more from the water column via gill uptake than that by diet. Although the target hazard quotients (THQ) of the six metals in the bream did not exceed 1, local fishermen should limit their consumption of this fish due to the high Pb concentration in the muscle tissue which surpasses the permissible limit for fish consumption proposed by the European Union.
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