Bauer Arthur de Barros, Paiva Thaís de Castro, Barboza Carlos Alberto de Moura, Malm Olaf, Fischer Luciano Gomes
Programa de Pós-Graduação em Ciências Ambientais e Conservação (PPG-CiAC), Universidade Federal do Rio de Janeiro (UFRJ), Macaé, RJ, Brazil.
Laboratório de Radioisótopos, Instituto de Biofísica, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, Brazil.
Biol Trace Elem Res. 2021 Dec;199(12):4772-4781. doi: 10.1007/s12011-021-02596-3. Epub 2021 Mar 2.
Mercury (Hg) contamination has caused ecological and socioeconomic problems worldwide. One of the main Hg contamination routes by the human populations is through fish ingestion. Herein, we analyzed the total Hg concentrations (THg) in highly consumed marine fish species: Brazilian flathead Percophis brasiliensis, Atlantic bigeye Priacanthus arenatus, Stripped weakfish Cynoscion guatucupa, and Jamaica weakfish C. jamaicensis. The specimens were collected from fishing landings off the Rio de Janeiro, SW Atlantic. Additionally, we calculate the estimated weekly intakes (EWI) and the maximum amount of fish (MAF) that can be safely ingested, both based on the provisional tolerable weekly intake (PTWI). The highest THg concentrations were recorded in P. brasiliensis with a mean of 340.59 μg/kg (dry weight) and the lowest in P. arenatus (115.75 μg/kg). THg concentrations were positively related to the δN ratios indicating an increase in contamination with trophic level. All samples showed THg concentrations below the established limits by Brazilian and international regulation. Hg intake via human fish consumption does not exceed the PTWI. The EWI varied from 1.41% (P. arenatus size class I) to 11.52% (P. brasiliensis class II) of the PTWI, while the estimated EWI for "fish consumers" varied between 8.35 and 68.07% PTWI. The MAF estimated for an adult (70 kg) could safely consume between 1277.85 and 7075.50 g/week. This study is an important baseline for monitoring and future comparisons. Therefore, it is important to maintain monitoring of mercury levels in fish species in different marine regions, especially those species most consumed by humans.
汞（Hg）污染已在全球范围内引发了生态和社会经济问题。人类造成汞污染的主要途径之一是通过食用鱼类。在此，我们分析了高消费海洋鱼类物种中的总汞浓度（THg）：巴西平头鲉（Percophis brasiliensis）、大西洋大眼鲷（Priacanthus arenatus）、条纹弱鱼（Cynoscion guatucupa）和牙买加弱鱼（C. jamaicensis）。样本采集自西南大西洋里约热内卢附近的渔获上岸点。此外，我们根据暂定每周耐受摄入量（PTWI）计算了估计每周摄入量（EWI）和可安全摄入的最大鱼类量（MAF）。在巴西平头鲉中记录到的THg浓度最高，平均为340.59μg/kg（干重），而在大西洋大眼鲷中最低（115.75μg/kg）。THg浓度与δN比值呈正相关，表明随着营养级的升高污染加剧。所有样本的THg浓度均低于巴西和国际法规规定的限值。通过人类食用鱼类摄入的汞不超过PTWI。EWI占PTWI的比例从1.41%（大西洋大眼鲷I级规格）到11.52%（巴西平头鲉II级规格）不等，而“鱼类消费者”的估计EWI在PTWI的8.35%至68.07%之间。估计一名成年（70kg）可安全每周食用1277.85至7075.50g。本研究是监测和未来比较的重要基线。因此，持续监测不同海洋区域鱼类物种中的汞含量非常重要，尤其是那些人类消费最多的物种。
