عنوان مقاله [English]
Heavy metals are at present classified among the most important and dangerous water pollutants and are considered as the serious threat to human health. Current study has been focused on concentration of two heavy metals; Zinc and Copper in the flesh of Macrobrachium rosenbergii and to observe their induced histopathological alterations in gills and hepatopancreas. The levels of Zn and Cu in 20 giant freshwater prawn specimensfrom Siahrood River in Mazandaran Province, Iran, were investigated during winter 2013. The concentrations of the metals were carried out by using Atomic Absorption SpectrophotometerThe gills and hepatopancreas specimens from each prawn were sampled in order to reveal the histopathological changes. Statistical analysis was carried out by SPSS19 software. The mean concentrations of Zn and Cu in the muscle of examined prawn were 1/011 ± 0.01 and 1.785 ± 0.02(mg/kg dry weight) respectively. Using one sample t-test at 95% confidence limit, there were significant difference in the levels of Zn and Cu, but there were not any significant difference in correlation between the mean concentration of Zn and Cu and the average of body lengths and weights. The data show that the concentrations of Zn and Cu in the flesh of prawn are below the legal value for aquatic products established by WHO, NHMRC and UK(MAFF), showed that the giant freshwater prawn frominvestigated region are safety for human consumption. In histopathological view, Edema, Inflammatory cells and epithelial hyperplasia changes of gills with lots of mucus were observed. In hepatopancreas atrophy and fatty changes were existed.