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Analysis of Heavy Metals of Muscle and Intestine
Tissue in Fish – in Banan Section of Chongqing
from Three Gorges Reservoir, China
Zheng Zhang 1, 2, Li He1, Jin Li3, Zhen-bin Wu2
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1 Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Jingzhou 434000, China
2 State Key Laboratory of Freshwater Ecology & Biotechnology, Institute of Hydrobiology, The Chinese Academy of
Sciences, Wuhan 430072, China
3 Department of Biology, Hubei Normal University, Huangshi 435002,China
Pol. J. Environ. Stud. 2007;16(6):949-958
KEYWORDS
ABSTRACT
The present study was carried out to investigate contamination of heavy metals in 19 fish species from the
Banan section of Chongqing in the Three Gorges, Yangtze River. The results showed that the mean concentrations
of heavy metals were higher in intestine than muscle, except zinc in upper strata. In the fish inhabiting the
upper strata, there were significant differences between mean concentrations of As, Cr, Cu and Hg in muscle
and intestine (P <0.05). There were also significant differences between mean concentrations of Cr and Cu
in muscle and intestine in the fish inhabiting middle strata. However, significant differences between mean
concentrations of As, Cd, Hg, Pb and Zn were measured in fish inhabiting bottom strata in both intestine and
muscle tissues (P <0.05). For the fish inhabiting different strata, the concentrations of As, Cd, Cr, Cu, Hg and
Pb in muscle and intestine of the fish from bottom strata (BS) were higher than those in both upper strata (US)
and middle strata (MS); whereas a higher concentration of Zn was measured in muscle and intestine from fish
inhabiting upper strata. Mean metal concentrations were found to be higher in age II than those in age I in
Coreius heterodon (2- and 1-year odl fish respectively). The overall results indicated that fish muscle in the
Banan section were slightly contaminated by heavy metals, but did not exceed Chinese food standards.