Accumulation of metals (Fe, Zn, Cu, Mn, Pb, Cd and Ni) in the muscles and gills of Oreochromis niloticus , Oreochromis aureus and Tilapia zillii was assessed based on seven locations in the Qahr El-Bahr area in Lake Al-Manzalah. The average accumulation of metals was in the following order: Tilapia zillii > Oreochromis aureus > Oreochromis niloticus . To determine the risk of fish consumption, the estimated daily intake, carcinogenic, non-carcinogenic and relative risk indices were calculated. The results indicate that the intake of individual metals through the consumption of fish is almost safe for human health, whereas the intake of combined metals poses a high potential health risk to consumers. Assessment of carcinogenic risk of Cd and Ni from the consumption of tilapia species indicates that consumers are at risk of cancer. The contribution of Pb and Cd to the overall relative risk index ranged from 34% to 41%. Of the three species studied, Oreochromis niloticus is relatively safe for consumption as it poses the least health hazard, while Tilapia zillii is more predisposed to accumulate metals in its tissues. Histopathological changes were observed in the muscles, gills and liver of Oreochromis niloticus as a result of heavy metal accumulation in these organs.

中文翻译：

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罗非鱼鱼类中重金属的积累以及埃及曼萨拉湖Qahr El-Bahr地区发生的尼罗罗非鱼肌肉、,和肝脏的相关组织病理学变化

根据Al-Manzalah湖Qahr El-Bahr地区的七个地点，评估了尼罗罗非鱼，金黄色和罗非鱼的肌肉和g中金属（铁，锌，铜，锰，铅，镉和镍）的积累。金属的平均积累按以下顺序：罗非鱼>金黄色奥罗藻>尼罗罗非鱼。为了确定鱼类食用的风险，计算了估计的每日摄入量，致癌性，非致癌性和相对风险指数。结果表明，通过食用鱼类摄入的各种金属对人类健康几乎是安全的，而摄入混合的金属则对消费者构成很高的潜在健康风险。从罗非鱼种类的食用中评估Cd和Ni的致癌风险表明，消费者有患癌症的风险。铅和镉对总体相对危险指数的贡献范围为34％至41％。在所研究的三个物种中，尼罗罗非鱼对健康的危害最小，因此食用相对安全，而罗非鱼更易在其组织中积累金属。由于这些器官中重金属的积累，在尼罗罗非鱼的肌肉，g和肝脏中观察到组织病理学变化。