Genotoxic damage in green turtles (Chelonia mydas) exhibits regional and annual fluctuations

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Marine environmental research Pub Date : 2025-02-01 Epub Date: 2024-11-28 DOI:10.1016/j.marenvres.2024.106877

Rodríguez-Salazar Claudia Lorena , Comas-García Mauricio , Muñoz Tenería Fernando Alberto , Zenteno-Savín Tania , Labrada-Martagón Vanessa

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Abstract

Tourism, urban development, and sargasso beaching caused environmental alterations in the Mexican Caribbean coasts. Little ecotoxicological information exists on the green turtle (Chelonia mydas) population inhabiting this region. Micronucleus (MN) and erythrocytic nuclear abnormalities (ENA) tests are non-destructive DNA damage biomarkers. We aimed to determine local (Punta Arenas, Akumal, Punta Herrero, and Xcalak) and annual (2015–2019) variability in MN/ENA frequency to understand genotoxic damage extent. Almost all the individuals sampled (n = 166) presented DNA damage (98.8%); the lack of correlations between MN/ENA and biological variables confirmed the usefulness of these tests as biomarkers. The southern foraging site had the highest number of MN/ENA; an increase over time was found in the most urbanized and the most protected sites, coinciding with previously reported regional variability of persistent organic compounds, heavy metals, and annual massive influx of sargasso. Considering the sentinel status of green turtles, the advantages of the blood tests, and the continuous accelerated urban development in the Caribbean, long-term monitoring of this species is advised.

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绿海龟（Chelonia mydas）的基因毒性损害表现出区域和年度波动

旅游业、城市发展和马尾藻海滩造成了墨西哥加勒比海岸的环境变化。关于该地区绿龟（Chelonia mydas）种群的生态毒理学资料很少。微核（MN）和红细胞核异常（ENA）测试是非破坏性DNA损伤的生物标志物。我们的目的是确定当地（Punta Arenas, Akumal， Punta Herrero和Xcalak）和年度（2015-2019）MN/ENA频率的变异性，以了解遗传毒性损害程度。几乎所有样本（n = 166）出现DNA损伤（98.8%）；MN/ENA与生物变量之间缺乏相关性证实了这些测试作为生物标志物的有效性。南部觅食地MN/ENA数量最多；随着时间的推移，在最城市化和最受保护的地点发现了增加，这与先前报道的持久性有机化合物、重金属和马尾藻每年大量流入的区域差异相一致。考虑到绿海龟的哨兵地位、血液检查的优势以及加勒比地区不断加速的城市发展，建议对这一物种进行长期监测。

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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.