The current study combined chemical data on trace elements and polycyclic aromatic hydrocarbons (PAH) from sediment and used a multibiomarker approach in the catfish Sciades herzbergii to evaluate two different sites in São Marcos Bay, Brazil. Higher diffuse contaminations by trace elements and PAH were detected in the sediment of Porto Grande (PG) harbor than in the Ilha dos Caranguejos (IC) reference area. A multibiomarker was used in catfish to evaluate the bioavailability of PAH in bile and the effects of pollutants in target tissues. The parameters considered were oxidative stress biomarkers (SOD, CAT, GSH, GST and LPO) and histopathological alterations and were compared between two seasons. The biological responses revealed adverse effects on the population, as indicated by the presence of trace elements and PAH as stressors. Principal component analysis (PCA) of the biomarkers corroborated these results and indicated that fish from the PG site during the rainy season in 2019 exhibited many biological effects compared to 2018. Overall, the present study showed that environmental contamination increased over the years and provides information on the contamination of sediments in the São Marcos Bay, Brazil. The results showed that the presence of contaminants was correlated with the health status of the catfish S. herzbergii.

目前的研究结合了沉积物中微量元素和多环芳烃（PAH）的化学数据，并在a鱼Sciades herzbergii中使用了多种生物标志物方法评估巴西圣马科斯湾的两个不同地点。在格兰港（PG）港口的沉积物中检测到的痕量元素和多环芳烃的扩散污染物比伊利亚杜斯卡兰格霍斯（IC）参考地区的污染物高。在multi鱼中使用了多种生物标志物，以评估PAH在胆汁中的生物利用度以及污染物在目标组织中的作用。所考虑的参数是氧化应激生物标志物（SOD，CAT，GSH，GST和LPO）和组织病理学改变，并在两个季节之间进行了比较。如痕量元素和多环芳烃作为应激源的存在所表明的那样，生物学反应揭示了对种群的不利影响。生物标志物的主成分分析（PCA）证实了这些结果，并表明与2018年相比，2019年雨季期间PG场所的鱼类表现出许多生物学效应。总体而言，本研究表明多年来环境污染有所增加并提供了信息关于巴西圣马科斯湾沉积物的污染。结果表明，污染物的存在与the鱼的健康状况有关S.herzbergii。