Polycyclic aromatic hydrocarbons (PAHs) are organic compounds ubiquitous in the environment and known for their toxic, mutagenic, and carcinogenic effects. These compounds can bioaccumulate in the biota and be transferred through trophic webs. The franciscana dolphin (), as top predators, can be an environmental sentinels. Thus, this study aimed to provide data about PAHs concentration in their hepatic tissue collected on the coast of Espírito Santo (Franciscana Management Area, FMA Ia), Rio de Janeiro (FMA IIa), and São Paulo states (FMA IIb), in Southeastern Brazil. PAHs were detected in 86 % of franciscana dolphins ( = 50). The highest ∑PAHs median concentration was reported in FMA Ia followed by FMA IIb and FMA IIa (1055.6; 523.9, and 72.1 ng.g lipid weight, respectively). Phenanthrene was detected in one fetus and two neonates, showing maternal transfer of PAHs in these dolphins. Evaluating PAHs with potential toxic effects is of utmost importance for the conservation of a threatened species.

中文翻译：

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西南大西洋弗朗西斯卡纳海豚中的多环芳烃：浓度和母体转移评估

多环芳烃 (PAH) 是环境中普遍存在的有机化合物，以其有毒、致突变和致癌作用而闻名。这些化合物可以在生物群中生物富集并通过营养网转移。弗朗西斯卡纳海豚（）作为顶级掠食者，可以成为环境哨兵。因此，本研究旨在提供有关在东南部圣埃斯皮里图州（弗朗西斯卡纳管理区，FMA Ia）、里约热内卢州（FMA IIa）和圣保罗州（FMA IIb）海岸收集的肝组织中多环芳烃浓度的数据。巴西。 86% 的法兰西斯卡纳海豚 (= 50) 中检测到了 PAH。据报道，FMA Ia 中的 ΣPAH 中位浓度最高，其次是 FMA IIb 和 FMA IIa（脂质重量分别为 1055.6、523.9 和 72.1 ng.g）。在一名胎儿和两名新生儿中检测到菲，表明这些海豚体内多环芳烃是母体转移的。评估多环芳烃的潜在毒性对于保护受威胁物种至关重要。