Abstract：
Heavy metal pollution, especially in freshwater, is a serious problem for aquatic organisms and human health. In this study, the scales of Capoeta capoeta living in the Karasu River (Turkey), which is estimated to be contaminated with pollutants, especially heavy metals, were examined for structural anomalies. Two stations on the river were selected for this purpose. Fish and surface water samples were taken at the stations. The heavy metal analyses were carried out in the water and the fish tissue. Heavy metal pollution was detected in the surface water. It was also observed that some heavy metals (As, Cu, Cd, Cr, Mn, Pb, Ni, Zn) accumulate in the fish tissue. Significant structural differences were observed on the dorsal surface of the scales, such as interrupted primary radii, damaged circuli, damaged focus, damaged anterior scale margin, broken focus, deformed scale structure, scattered chromatophores, dilatation of primary radii, loss of focus, damaged annuli, symmetry shift in the lateral line canal, eroded circuli, damaged posterior scale margin, double focus, branching in the primary radii, asymmetric circuli, incomplete annuli and interrupted secondary radii in each of the fish collected from the contaminated site. Heavy metals are suspected to be responsible for the structural anomalies in the scales. Based on these observations, it can be said that fish scales can be used as an effective indicator of water quality.
摘要：
重金属污染,尤其是在淡水中，是水生生物和人类健康的严重问题。在这项研究中,卡波塔卡波塔生活在卡拉苏河（土耳其）的规模，估计被污染物污染了，特别是重金属，进行了结构异常检查。为此目的选择了河上的两个站。在车站采集了鱼类和地表水样品。在水和鱼组织中进行重金属分析。在地表水中检测到重金属污染。还观察到一些重金属(As，Cu,Cd,Cr,Mn,Pb,Ni,Zn)在鱼组织中积累。在鳞片的背面观察到显着的结构差异，例如中断的初级半径，受损的循环，焦点受损,损伤的前鳞边缘，破碎的焦点，变形的鳞片结构，分散的色谱，初级半径的扩张，失去焦点,损坏的环形空间,侧线运河的对称移动，侵蚀环流，后鳞边缘受损，双焦点,在主要半径上分支，非对称循环，从污染地点收集的每条鱼的环状不完整和次生半径中断。重金属被怀疑是造成鳞片结构异常的原因。基于这些观察,可以说鱼鳞可以作为水质的有效指标。
