Hlatshwayo Sanelisiwe Siphumelele Brightness, Bissessur Ajay, Selala Mapurunyane Callies, Takai Yuki, Lebepe Jeffrey
School of Life Sciences, University of KwaZulu-Natal: Westville Campus, Durban, South Africa.
School of Chemistry and Physics, University of KwaZulu-Natal: Westville Campus, Durban, South Africa.
Environ Monit Assess. 2024 Jul 17;196(8):742. doi: 10.1007/s10661-024-12875-w.
Fish is among the most affordable and readily available protein sources for communities residing near water bodies. However, the recent pollution status of aquatic ecosystems has rendered fish consumption risky for human health. The study evaluated metal levels in the liver, gill, and muscle tissues of Redbreast tilapia (Coptodon rendalli) from Inanda and Nagle dams in the uMgeni River system. Metals, Al, Sb, Cd, Cr, Fe, Mn, Mo, Pb, and Zn were analysed using ICP-OES. Fish size showed no significant difference between the two dams (p > 0.05) whereas a descending trend liver > gill > muscle was observed for most metal levels at both dams. Moreover, there was a clear separation for metal levels in the liver, gill, and muscle between the two dams (p < 0.001) and a similar trend was observed for organs in each dam (p < 0.001). No relationship was observed between fish length and metal levels and no definite trend was observed for inter-metal relationships. Antimony, Cr, and Pb showed THQs greater than 1 at both dams which suggests health risks for consumers. Molybdenum has also shown a concerning THQs with some individuals exhibiting values ranging from 0.5 - 0.9. These findings suggest that consuming C. rendalli from the Inanda and Nagle dams could result in adverse health effects from Sb, Cr and Pb.
对于居住在水体附近的社区而言，鱼类是最经济实惠且易于获取的蛋白质来源之一。然而，近期水生生态系统的污染状况使得食用鱼类对人类健康构成风险。该研究评估了来自乌姆盖尼河水系伊南达坝和纳格尔坝的红胸罗非鱼（Coptodon rendalli）肝脏、鳃和肌肉组织中的金属含量。使用电感耦合等离子体发射光谱仪（ICP - OES）分析了铝（Al）、锑（Sb）、镉（Cd）、铬（Cr）、铁（Fe）、锰（Mn）、钼（Mo）、铅（Pb）和锌（Zn）等金属。两个坝之间的鱼大小没有显著差异（p > 0.05），而在两个坝中，大多数金属含量均呈现出肝脏>鳃>肌肉的下降趋势。此外，两个坝的肝脏、鳃和肌肉中的金属含量存在明显差异（p < 0.001），并且每个坝中各器官也呈现出类似趋势（p < 0.001）。未观察到鱼的长度与金属含量之间的关系，金属间关系也未呈现出明确趋势。在两个坝中，锑、铬和铅的靶器官危害系数（THQs）均大于1，这表明对消费者存在健康风险。钼的THQs也令人担忧，一些个体的值在0.5 - 0.9之间。这些发现表明，食用来自伊南达坝和纳格尔坝的红胸罗非鱼可能会因锑、铬和铅而导致不良健康影响。
