Maternal offloading of polycyclic aromatic hydrocarbons (PAHs) poses a significant exposure route for developing embryos, with implications for subsequent generations. Despite known developmental effects regarding fish physiology and behavior, maternal PAH transfer assessments in elasmobranchii are still lacking. This study investigated PAH contamination and maternal transfer in one female Lesser Numbfish () electric ray and seven embryos for the first time. Naphthalene was identified as the predominant low molecular weight PAH, and dibenzo[,]anthracene was the most abundant high molecular weight compound. Most embryos exhibited some level of PAH exposure, with varying accumulation patterns potentially influenced by size, developmental stage, and yolk absorption rates. Further investigation is warranted to understand the impacts of PAH maternal offloading on elasmobranchii uterine contents and embryos.

中文翻译：

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巴西东南部受影响河口的小麻鱼 Narcine brasiliensis（Elasmobranchii：Batoidea）的基线多环芳烃母体转移数据


母体排出的多环芳烃 (PAH) 为发育中的胚胎提供了重要的暴露途径，并对后代产生影响。尽管已知对鱼类生理和行为的发育影响，但仍缺乏对软骨鱼母体多环芳烃转移的评估。这项研究首次调查了一只雌性小麻鱼（Lesser Numbfish）和七个胚胎的多环芳烃污染和母体移植。萘被确定为主要的低分子量多环芳烃，二苯并[,]蒽是最丰富的高分子量化合物。大多数胚胎表现出一定程度的多环芳烃暴露，不同的积累模式可能受到大小、发育阶段和卵黄吸收率的影响。需要进一步研究以了解 PAH 母体卸载对软骨鱼子宫内容物和胚胎的影响。