سال انتشار: ۱۳۸۷
محل انتشار: اولین کنگره بین المللی مدیریت بهداشتی و بیماریهای آبزیان
تعداد صفحات: ۱
M Ebrahimi – Green Research Center, Qom University
M Taherianfard – Department of Physiology, School of Veterinary Medicince, Shiraz University, IRAN
Method & Materials: Heavy metals concentration in muscles, liver, kidney, brain and gonad tissues of two cyprinid fishes, Cyprinus carpio and Capoeta spp., from three sections of the upper, middle and lower parts of the Kor River was evaluated in 2006. Totally 225 specimens were caught for this purpose (75 specimens from each zone). Tissue samples were digested in acid and their lead concentrations were assayed by ICP method.
Results & Conclusion: Statistical analysis of data showed significantly (P<0.05) higher concentrations of heavy metals in the mid zone than the two other zones. No significant differences (P>0.05) were seen between sexes and species. The same pattern of contamination was also observed in water and sediment samples from three sampling zones. The maximum amount of mercury, lead, arsenic and cadmium measured in this study were 0.99mg/kg, 1.85mg/kg, 1.175mg/kg and 0.172mg/kg, respectively. This study showed that industrial activities around the Kor River have already polluted the River and Pb residues in fish tissues and its water is higher than the upstream and terminal parts. The contamination, nevertheless, is still lower than the maximum allowed for those heavy metals in water and fish tissues but this is still worrisome.