Department of Biology, National and Kapodistrian University of Athens, Panepistimiopolis, Ilissia, 15784 Athens, Greece.
Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, Ilissia, 15784 Athens, Greece.
Food Chem. 2020 Nov 30;331:127267. doi: 10.1016/j.foodchem.2020.127267. Epub 2020 Jun 8.
This study determines the levels of total mercury in muscle tissue from 268 reared Atlantic bluefin tuna in the Mediterranean Sea, detects variations on mercury concentrations in relation to biological parameters and rearing period and evaluates the health risk posed by fish consumption taking into consideration the size, age and rearing period. A total of 30 pooled samples were analyzed. The total Hg concentrations ranged from 0.49 to 1.60 mg/kg w.w. and showed a significant positive relationship with the size and age. It was found that the longer the rearing period, the lower the mercury concentration. The total Hg exceeded the maximum level defined by the European Commission Decision in a proportion of 40.0%. Since the value of Target Hazard Quotient was higher than 1 in all different groups (medium, large, 6 months and 18 months reared specimens), the maximum possible safe weekly consumption (400 g) is suggested.
本研究测定了地中海 268 条养殖大西洋蓝鳍金枪鱼肌肉组织中的总汞含量，检测了汞浓度与生物学参数和养殖期的变化，并考虑到鱼的大小、年龄和养殖期，评估了食用鱼类带来的健康风险。共分析了 30 个混合样本。总汞浓度范围为 0.49 至 1.60 毫克/千克湿重，与大小和年龄呈显著正相关。结果发现，养殖期越长，汞浓度越低。总汞浓度超过了欧盟委员会决定规定的最大限量的 40.0%。由于在所有不同组别（中型、大型、6 个月和 18 个月养殖标本）中目标危害系数的值都高于 1，因此建议每周最大安全食用量（400 克）。
