Abstract：
The present study evaluated the cadmium (Cd) levels and temporal variation of Cd in dark muscle, white muscle, and liver of juvenile Thunnus albacares. 72 individuals (Standard length: 50-67 cm; weight: 0.8-2.5 kg) were collected from Indian Oceanic water around Sri Lanka during the period between April 2021 to May 2022. Total Cd levels were analyzed using an Inductively Coupled Plasma Mass Spectrophotometer. The mean Cd levels (mean ± SD mg kg-1 dry weight) in different tissues varied with significantly higher levels in the liver (13.62 ± 0.98, p < 0.05), compared to dark muscle (0.52 ± 0.05), and white muscle (0.42 ± 0.04). Cd levels in liver tissues were positively correlated (p < 0.05) with the fish weight. The Cd levels reported in dark muscles, white muscles, and liver tissues were significantly higher (p < 0.05) during 2nd inter-monsoon than in the other monsoonal regimes and exceeded the maximum permissible level (0.1 mg kg-1 wet weight) set by the European Union (EU). However, the measured Cd levels in white and dark muscles were below the maximum permissible level (0.2 mg kg-1 wet weight) set by FAO/WHO. The Cd levels in all the liver tissues were above the levels set by the EU and FAO/WHO. Accordingly, people should avoid the consumption of liver tissues of T. albacares from the Indian Ocean. A human with a body weight of 60 kg can consume white muscles up to 4.667 kg per week without exceeding the Provisional Tolerable Weekly Intake.
摘要：
本研究评估了深色肌肉中镉（Cd）水平和Cd的时间变化，白色肌肉,和幼年Thunnusalbacares的肝脏。在2021年4月至2022年5月期间，从斯里兰卡周围的印度洋水域收集了72个人（标准长度：50-67厘米；体重：0.8-2.5千克）。使用电感耦合等离子体质谱仪分析总Cd水平。不同组织中的平均Cd水平（平均值±SDmgkg-1干重）在肝脏中的水平显着升高（13.62±0.98，p<0.05），与深色肌肉相比（0.52±0.05），白肌(0.42±0.04)。肝脏组织中Cd含量与鱼体重呈正相关(p<0.05)。在深色肌肉中报告的Cd水平，白色的肌肉,在第二次季风期间，肝脏组织显着高于其他季风制度（p<0.05），并且超过了欧盟（EU）设定的最大允许水平（0.1mgkg-1湿重）。然而,测得的白色和深色肌肉中的Cd水平低于粮农组织/世界卫生组织设定的最大允许水平（0.2mgkg-1湿重）。所有肝脏组织中的Cd水平均高于欧盟和FAO/WHO设定的水平。因此，人们应该避免食用来自印度洋的T.albacares的肝脏组织。体重为60公斤的人每周可以消耗高达4.667公斤的白色肌肉，而不会超过临时耐受每周摄入量。
