Spatial and temporal distribution of mercury contamination in Bombay duck (Harpadon nehereus) from southeastern coastal China.

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research Pub Date : 2025-10-01 Epub Date: 2025-08-21 DOI:10.1016/j.marenvres.2025.107474

Feng Zeng, Ziqi Wang, Yuanyuan Liu, Bin Kang, Jiachen Sun

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引用次数: 0

Abstract

China's southeastern coast, particularly Zhejiang, Fujian, and Guangdong, is rich in key fishery resources but also faces elevated contamination due to intensive industrial activity. The study investigated the spatial and temporal variations of mercury (Hg) in Bombay duck (Harpadon nehereus) collected from five coastal sites, the Yangtze River estuary, Hangzhou Bay, Wenzhou, Xiamen and Zhanjiang. The Hg levels and MeHg/THg ratios generally increased with decreasing latitude, with the highest Hg concentrations observed in Zhanjiang (THg: 0.2034 mg/kg, MeHg: 0.1778 mg/kg), significantly exceeding those at other sites. Weight-adjusted Hg levels showed a reversed trend between Zhanjiang and Hangzhou Bay, attributing mainly to the small fish size of the latter site, and support the need for site-specific monitoring. The monthly Hg concentrations and MeHg/THg ratios peaked in Xiamen in August, exhibiting seasonal variation patterns that correlated with monthly fluctuations in water temperature. Toxicity risk thresholds indicated that Bombay duck from Zhanjiang and Xiamen were at low to moderate risks, while Target Hazard Quotient (THQ) results suggested no potential health risks to humans from their consumption. Further ecotoxicological assessments are needed, along with investigations into the underlying mechanisms of the spatiotemporal variation in Hg methylation, assimilation and bioaccumulation.

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中国东南沿海孟买鸭（Harpadon nehereus）汞污染的时空分布特征。

中国东南沿海地区，特别是浙江、福建和广东，拥有丰富的关键渔业资源，但由于密集的工业活动，污染也在加剧。研究了长江口、杭州湾、温州、厦门和湛江5个沿海地点孟买鸭（Harpadon nehereus）体内汞（Hg）的时空变化规律。Hg水平和MeHg/THg比值总体上随纬度的降低而升高，其中湛江地区Hg浓度最高（THg为0.2034 mg/kg， MeHg为0.1778 mg/kg），显著高于其他地区。体重调整后的汞水平在湛江湾和杭州湾之间呈相反趋势，主要原因是后者的鱼类规模较小，支持了对特定站点进行监测的必要性。月汞浓度和MeHg/THg比值在8月达到峰值，呈现出与水温月波动相关的季节变化规律。毒性风险阈值显示，来自湛江和厦门的孟买鸭处于低至中等风险，而目标危害商（THQ）结果显示，食用孟买鸭对人类没有潜在的健康风险。需要进一步的生态毒理学评估，以及对汞甲基化、同化和生物积累时空变化的潜在机制的研究。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Marine environmental research 环境科学-毒理学

CiteScore

5.90

自引率

3.00%

发文量

217

审稿时长

46 days

期刊介绍： Marine Environmental Research publishes original research papers on chemical, physical, and biological interactions in the oceans and coastal waters. The journal serves as a forum for new information on biology, chemistry, and toxicology and syntheses that advance understanding of marine environmental processes. Submission of multidisciplinary studies is encouraged. Studies that utilize experimental approaches to clarify the roles of anthropogenic and natural causes of changes in marine ecosystems are especially welcome, as are those studies that represent new developments of a theoretical or conceptual aspect of marine science. All papers published in this journal are reviewed by qualified peers prior to acceptance and publication. Examples of topics considered to be appropriate for the journal include, but are not limited to, the following: – The extent, persistence, and consequences of change and the recovery from such change in natural marine systems – The biochemical, physiological, and ecological consequences of contaminants to marine organisms and ecosystems – The biogeochemistry of naturally occurring and anthropogenic substances – Models that describe and predict the above processes – Monitoring studies, to the extent that their results provide new information on functional processes – Methodological papers describing improved quantitative techniques for the marine sciences.