Laboratório de Mamíferos Aquáticos e Bioindicadores Professora Izabel Gurgel, Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, RJ, Brazil; Laboratório de Biologia e Tecnologia Pesqueira, Departamento de Biologia Marinha, Instituto de Biologia, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, Brazil.
Laboratório de Mamíferos Aquáticos e Bioindicadores Professora Izabel Gurgel, Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, RJ, Brazil; Laboratório de Biologia e Tecnologia Pesqueira, Departamento de Biologia Marinha, Instituto de Biologia, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, Brazil.
Mar Pollut Bull. 2022 Sep;182:114002. doi: 10.1016/j.marpolbul.2022.114002. Epub 2022 Aug 5.
A global movement towards decreases in elasmobranch overfishing has been noted in the last decades. However, discussion concerning the effects of POP contamination on the health and survival of these organisms is still recent. These compounds can affect the immune and endocrine systems of both sharks and batoids, impairing reproduction and impacting species recruitment, acting synergistically alongside overfishing effects. In this context, this study investigated the concentration of organochlorine compounds in liver of 29 individuals of Rioraja agassizii, a commercially exploited skate classified as Vulnerable by IUCN and as Endangered in Brazil. Contaminant concentrations were higher in adults compared to juveniles. Distinct contamination profiles were observed, suggesting different groups within the investigated population and revealing contaminants as a potential tool to assess population ecology. PCB levels were considered a concern as they resemble concentrations in ecosystems from the northern hemisphere, where deleterious effects on elasmobranchs have been observed.
在过去几十年中，人们注意到全球减少了对鲛鱼类的过度捕捞。然而，关于 POP 污染对这些生物的健康和生存的影响的讨论仍然是最近的事情。这些化合物会影响鲨鱼和鳐鱼的免疫和内分泌系统，损害繁殖并影响物种的补充，与过度捕捞的影响协同作用。在这种情况下，本研究调查了 29 条被IUCN 列为易危物种和巴西濒危物种的被商业开发的魟 Rioraja agassizii 肝脏中有机氯化合物的浓度。与幼鱼相比，成鱼体内的污染物浓度更高。观察到不同的污染特征，表明在所研究的种群中有不同的群体，并揭示了污染物作为评估种群生态学的潜在工具。由于 PCB 水平类似于北半球生态系统中的浓度，而在这些生态系统中已经观察到对鲨鱼的有害影响，因此 PCB 水平令人担忧。
