POPs in the South Latin America: Bioaccumulation of DDT, PCB, HCB, HCH and Mirex in blubber of common dolphin (Delphinus delphis) and Fraser's dolphin (Lagenodelphis hosei) from Argentina
POPs in the South Latin America: Bioaccumulation of DDT, PCB, HCB, HCH and Mirex in blubber of common dolphin (Delphinus delphis) and Fraser's dolphin (Lagenodelphis hosei) from Argentina
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DOI：
10.1016/j.scitotenv.2016.07.176
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发表时间：
2016-12-01
影响因子：
9.8
通讯作者：
Lailson-Brito, Jose
中科院分区：
文献类型：
--
作者：
Alberto Durante, Cristian;Batista Santos-Neto, Elitieri;Lailson-Brito, Jose
有机化合物，特别是有机氯，是在生物和非生物底物中积累的高度持久性化合物。海洋哺乳动物通过饮食积累和放大持久性有机污染物。对1999年和2012年采集的普通海豚（Delphinus delphis）和菲沙海豚（Lagenodelphis hosei）皮下脂肪组织样本进行了SPCB（26种PCB同系物）、Sigma DDT （pp-DDT、pp-DDD、pp-DDE）、Sigma HCH （α -HCH、β -HCH、γ -HCH、delta-HCH）、HCB和mirex的分析。这项研究的目的是确定持久性有机污染物的浓度，以获得关于这些化合物在南大西洋这两个物种中目前污染状况的基线信息。同时，评估持久性有机污染物浓度与普通海豚的年龄、体长和性成熟的关系。弗雷泽海豚体内主要含有有机氯农药，其中DDT含量最高，而多氯联苯则主要存在于普通海豚体内。在这两个物种中，异构体或代谢物的分布顺序为：β - hch > δ - hch > γ - hch > α - hch和pp-DDE>pp-DDD>pp-DDT。对于Sigma PCB，贡献最大的是高分子量的同源物，特别是hexa和hepta - CBs。有机氯浓度对普通海豚的性成熟、年龄和标准体长没有影响。这项研究中发现的平均浓度比其他地方对海豚进行的其他研究报告的浓度要低。这项研究提供了关于西南大西洋普通海豚体内有机氯含量的新信息。(C) 2016 Elsevier B.V.版权所有
Organic compounds, in particular organochlorines, are highly persistent compounds which accumulate in biotic and abiotic substrates. Marine mammals bioaccumulate and biomagnify persistent organic pollutants (POPs) through diet. SPCB (26 PCB congeners), Sigma DDT (pp-DDT, pp-DDD, pp-DDE), Sigma HCH (alpha-HCH, beta-HCH, gamma-HCH, delta-HCH), HCB and mirex were analyzed from samples of subcutaneous adipose tissue of common dolphins, Delphinus delphis, and Fraser's dolphins, Lagenodelphis hosei, obtained in 1999 and 2012. The aim of this study was to determine the concentrations of POPs to get baseline information on the current state of pollution by these compounds in these two species in South Atlantic. At the same time, to assess concentrations of POPs in relation to age, the total length and sexual maturity in common dolphins. Organochlorine pesticides dominated Fraser's dolphins, DDT being the most abundant, while PCBs were mostly present in common dolphins. In both species, the distributions of isomers or metabolites followed the order: beta-HCH>delta-HCH>gamma-HCH>alpha-HCH and pp-DDE>pp-DDD>pp-DDT. As for Sigma PCB, the largest contribution was given by congeners of high molecular weight, particularly by hexa and hepta - CBs. Common dolphins did not show effects on sexual maturity, age and standard length in the concentration of organochlorines. The mean concentrations found in this study are lower compared to those reported in other studies performed in dolphins elsewhere. This study provides new information regarding levels of organochlorines in common dolphins for the Southwestern Atlantic. (C) 2016 Elsevier B.V. All rights reserved.