Nirchio Tursellino Mauro, Coppola Nicola Noemi, Gaviria Montoya Juan Ignacio, Gómez Juan Antonio
Departamento de Acuicultura, Facultad de Ciencias Agropecuarias, Universidad Técnica de Machala, Av. Panamericana km 5.5, Vía Pasaje, Machala 070150, Ecuador.
Departamento de Acuicultura, Escuela de Ciencias Aplicadas del Mar, Universidad de Oriente, Boca de Río 6301, Estado Nueva Esparta, Venezuela.
Toxics. 2025 Mar 13;13(3):206. doi: 10.3390/toxics13030206.
Environmental monitoring requires reliable bioindicators to assess the genotoxic effects of pollutants in aquatic ecosystems. In this study, the marine fish was evaluated as a bioindicator of genotoxicity through the application of the micronucleus test. Fish were exposed to varying concentrations of mercuric chloride (HgCl) (0.1, 0.25, and 0.5 µg HgCl/g body weight) over different time intervals (24, 48, 72, and 96 h). A dose- and time-dependent increase in nuclear abnormalities, including micronuclei, was observed, with significant chromosomal damage detected at 0.25 and 0.5 µg HgCl/g body weight. These results demonstrate the sensitivity of to mercury exposure, even at concentrations below regulatory safety thresholds, emphasizing its suitability as a bioindicator for detecting genotoxic contamination in coastal ecosystems. This study provides critical insights into the ecological risks posed by mercury and highlights the potential of to enhance environmental monitoring programs, particularly in regions vulnerable to heavy metal pollution.
环境监测需要可靠的生物指示物来评估水生生态系统中污染物的遗传毒性效应。在本研究中，通过应用微核试验，将海洋鱼类评估为遗传毒性的生物指示物。在不同的时间间隔（24、48、72和96小时）内，让鱼类暴露于不同浓度的氯化汞（HgCl）（0.1、0.25和0.5微克HgCl/克体重）。观察到包括微核在内的核异常呈剂量和时间依赖性增加，在0.25和0.5微克HgCl/克体重时检测到明显的染色体损伤。这些结果表明，即使在低于监管安全阈值的浓度下，[此处原文缺失鱼类名称]对汞暴露也很敏感，强调了其作为检测沿海生态系统中遗传毒性污染的生物指示物的适用性。本研究为汞带来的生态风险提供了关键见解，并突出了[此处原文缺失鱼类名称]在加强环境监测计划方面的潜力，特别是在易受重金属污染的地区。
