| trace element level in different tissues of rutilus frisii kutum collected from tajan river, iran. | tajan river is among the most significant rivers of the caspian sea water basin. in this study, the concentration of cr, cu, fe, mn, ni, pb, cd, and zn were determined in brain, heart, liver, gill, bile, and muscle of rutilus frisii kutum which has great economic value in the mazandaran state. trace element levels in fish samples were analyzed by means of atomic absorption spectrometry. nearly all non-essential metals levels (ni, pb, cd) detected in tissues were higher than limits for fish propo ... | 2011 | 20978865 |