Siraj Muhammad, Khisroon Muhammad, Khan Ajmal
Department of Zoology, University of Peshawar, Khyber Pakhtunkhwa, Pakistan.
Biol Trace Elem Res. 2016 Jul;172(1):242-250. doi: 10.1007/s12011-015-0572-4. Epub 2015 Dec 5.
The aim of the study was to quantify the accumulation of heavy metals like Zn, Ni, Cr, Cu, Cd, Mn, Fe, and Hg in various organs of Wallago attu. Samples were collected from polluted parts of River Kabul and compared with control fish netted from Warsak Dam. The data indicated that the sequence of metal bioaccumulation in the skin, gills, and muscle was Zn > Cr > Pb > Cu > Ni > Fe > Mn > Hg > Cd, in the intestine was Zn > Pb > Cr > Cu > Ni > Fe > Mn > Hg > Cd, and in the liver was Zn > Pb > Cr > Cu > Ni > Fe > Mn > Hg > Cd. The overall metal burden in different tissues of W. attu was in the sequence of skin > gills > intestine > muscle > liver. The skin being the prime target organ showed that the route of metal uptake was the direct result of fish to metal exposure. The liver accumulated the least level of metals than other organs of the same fish.
本研究的目的是量化斑点叉尾鮰各器官中锌、镍、铬、铜、镉、锰、铁和汞等重金属的积累情况。样本取自喀布尔河受污染区域，并与从瓦尔萨克大坝捕获的对照鱼进行比较。数据表明，皮肤、鳃和肌肉中金属生物积累的顺序为锌＞铬＞铅＞铜＞镍＞铁＞锰＞汞＞镉，肠道中为锌＞铅＞铬＞铜＞镍＞铁＞锰＞汞＞镉，肝脏中为锌＞铅＞铬＞铜＞镍＞铁＞锰＞汞＞镉。斑点叉尾鮰不同组织中的总体金属负荷顺序为皮肤＞鳃＞肠道＞肌肉＞肝脏。作为主要靶器官的皮肤表明，金属摄取途径是鱼类直接接触金属的结果。肝脏积累的金属水平低于同一条鱼的其他器官。
