Laboratorio de Química Ambiental, Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales (IANIGLA, CCT-CONICET), Mendoza 5500, Argentina.
Laboratorio de Química Ambiental, Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales (IANIGLA, CCT-CONICET), Mendoza 5500, Argentina; Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Cuyo, Mendoza, Argentina.
Ecotoxicol Environ Saf. 2017 Nov;145:630-639. doi: 10.1016/j.ecoenv.2017.08.009. Epub 2017 Aug 12.
In the present study, the possible associations between selected persistent organic pollutants (POPs) and biological factors were assessed in different tissues of two Antarctic notothenioid fish: Notothenia rossii (NOR) and Trematomus newnesi (TRN) collected at Potter Cove, King George Island/Isla 25 de Mayo, South Shetland Islands. Specifically, association patterns between biological factors (body size, lipid content, body condition) and POP concentrations (polychlorinated biphenyls (PCBs), dichlorodiphenyltrichloroethane (DDT) and metabolites, polybrominated diphenyl ethers (PBDEs), and hexachlorocyclohexane (HCH), hexachlorobenzene (HCB), chlordanes (CHLs) and methoxylated polybrominated diphenyl ethers (MeO-PBDEs)), were explored by using two approaches: multivariate analyses (principal component analysis: PCA) and intraspecific correlations. Integrating results suggest that biological factors such as size, KI and tissue type seemed to be associated to selective accumulation of POPs for immature specimens of N. rossii, and KI and tissue type for mature specimens of T. newnesi. Each particular factor should be considered when choosing N. rossii or T. newnesi as sentinels for POPs pollution in Antarctic marine environments. Further, both nototheniids showed a selective accumulation pattern in their gonads of penta-chlorinated biphenyls (penta-CBs; 55.5 and 29ngg lw for N. rossii and T. newnesi, respectively) and organochlorine pesticides such as DDTs (199 and 13.3ngg lw, for N. rossii and T. newnesi respectively), and of polybrominated diphenyl ethers (PBDEs) in gills (97.2 and 22.1 for ngg lw, for N. rossii and T. newnesi, respectively), highlighting the importance of these tissues in monitoring studies of pollution in fish. The current study expands the knowledge concerning the biological factors to be investigated when specific pollutants are monitored and supports the importance of tissue type for the selective accumulation of POPs in Antarctic fish. Additionally, a contribution to the scarce data on concentration of MeO-PBDEs in Antarctic marine organisms, particularly in the highly diverse perciform suborder Notothenioidei is provided.
在本研究中，评估了两种南极鳕鱼（Notothenia rossii（NOR）和 Trematomus newnesi（TRN））不同组织中选定的持久性有机污染物（POPs）与生物因素之间的可能关联，这些样本取自乔治王岛/五月二十五岛的波特湾。具体来说，通过两种方法探索了生物因素（体型、脂肪含量、身体状况）与 POP 浓度（多氯联苯（PCBs）、滴滴涕（DDT）及其代谢物、多溴联苯醚（PBDEs）、六氯环己烷（HCH）、六氯苯（HCB）、氯丹（CHLs）和甲氧基多溴联苯醚（MeO-PBDEs））之间的关联模式：多变量分析（主成分分析：PCA）和种内相关性。整合结果表明，体型、KI 和组织类型等生物因素似乎与 NOR 幼鱼的 POP 选择性积累有关，而 KI 和组织类型与 T. newnesi 成熟标本有关。在选择 N. rossii 或 T. newnesi 作为南极海洋环境中 POP 污染的生物标志物时，应考虑每种特定因素。此外，两种鳕鱼的生殖腺都表现出五氯联苯（penta-CBs；NOR 和 T. newnesi 分别为 55.5 和 29ngg lw）和有机氯农药（如滴滴涕）的选择性积累模式（NOR 和 T. newnesi 分别为 199 和 13.3ngg lw），以及鳃中的多溴联苯醚（PBDEs）（NOR 和 T. newnesi 分别为 97.2 和 22.1ngg lw），突出了这些组织在鱼类污染监测研究中的重要性。本研究扩展了关于在监测特定污染物时应调查的生物因素的知识，并支持组织类型对南极鱼类中 POP 选择性积累的重要性。此外，为南极海洋生物中 MeO-PBDEs 的浓度提供了稀缺数据的补充，特别是在高度多样化的鲈形目 Notothenioidei 中。
