Programa de Pós-Graduação em Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande-FURG, Av. Itália Km 8, 96203-900 Rio Grande, Brazil.
Programa de Pós-Graduação em Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande-FURG, Av. Itália Km 8, 96203-900 Rio Grande, Brazil.
Sci Total Environ. 2023 Oct 1;893:164873. doi: 10.1016/j.scitotenv.2023.164873. Epub 2023 Jun 17.
The present study aimed to determine persistent organic pollutants (POPs) and contaminants of emerging concern in endangered angelshark and guitarfish species from southeastern Brazil, and to investigate potential impacts of these compounds on morphometric indexes. Pesticides of emerging concern, pharmaceutical and personal care products (PPCPs), polycyclic aromatic hydrocarbons (PAHs), and polybrominated diphenyl ethers (PBDEs) were determined in hepatic and muscular tissues of Pseudobatos horkelii, P. percellens, Squatina guggenheim, and Zapteryx brevirostris obtained from artisanal and industrial fisheries operating in southeastern Brazil. Accumulation profiles and effects of contaminants on condition factor and hepatosomatic index were investigated. No differences were detected regarding species contaminant concentration, potentially due to similarities in habits, occurrence and trophic position shared by guitarfishes and angelsharks. Polycyclic aromatic hydrocarbons (23.2-495.3 ng g ), and PPCPs such as diclofenac (<LOQ - 448.4 ng g) and methylparaben (<LOQ - 645.5 ng g) presented the highest concentrations, regardless of the species. Effects of elasmobranch size were not significant on contaminant levels, indicating the lack of bioaccumulation over time. We suggest that the exposure to contaminants in elasmobranchs inhabiting this region is highly dependent on the economic activities and high urban development in southeastern Brazil. Regarding potential impacts of such exposure, the condition factor was only negatively influenced by PBDEs concentrations, whereas the hepatosomatic index was not influenced by any contaminant. Despite this, our results indicate that guitarfishes and angelsharks are exposed to POPs and contaminants of emerging concern potentially toxic to aquatic organisms. In this context, more refined biomarkers should be used to predict potential impacts of these contaminants on elasmobranch's health.
本研究旨在确定濒危天使鲨和锯鲨物种中持久性有机污染物 (POPs) 和新兴关注污染物，并研究这些化合物对形态指数的潜在影响。在巴西东南部的手工和工业渔业中获得的 Pseudobatos horkelii、P. percellens、Squatina guggenheim 和 Zapteryx brevirostris 的肝组织和肌肉组织中测定了新兴关注的农药、药物和个人护理产品 (PPCP)、多环芳烃 (PAH) 和多溴二苯醚 (PBDE)。研究了污染物的积累特征以及对条件因子和肝体比的影响。由于锯鲨和天使鲨的习性、出现和营养位置相似，因此未检测到不同物种的污染物浓度差异。多环芳烃 (23.2-495.3 ng g) 和 PPCP 如双氯芬酸 (<LOQ-448.4 ng g) 和甲基对苯二甲酸 (<LOQ-645.5 ng g) 无论物种如何，均呈现出最高浓度。鲨鱼大小对污染物水平的影响不显著，表明随着时间的推移没有生物积累。我们认为，在巴西东南部经济活动和高度城市化的影响下，该地区栖息的鲨鱼暴露于污染物的程度很高。关于这种暴露的潜在影响，只有 PBDEs 浓度对条件因子有负面影响，而任何污染物都不会影响肝体比。尽管如此，我们的结果表明，锯鲨和天使鲨暴露于潜在对水生生物有毒的 POPs 和新兴关注污染物中。在这种情况下，应使用更精细的生物标志物来预测这些污染物对鲨鱼健康的潜在影响。
