Universidade de São Paulo, Instituto Oceanográfico, Praça do Oceanográfico 191, 05508-120 São Paulo-SP, Brazil.
Mar Pollut Bull. 2012 Dec;64(12):2650-5. doi: 10.1016/j.marpolbul.2012.10.012. Epub 2012 Nov 13.
In the present work, fat, skin, liver and muscle samples from Leptonychotes weddellii (Weddell seal, n=2 individuals), Lobodon carcinophagus (crabeater seal, n=2), Arctocephalus gazella (Antarctic fur seal, n=3) and Mirounga leonina (southern elephant seal, n=1) were collected from King George Island, Antarctica, and analysed for POPs (PCBs, organochlorine pesticides and PBDEs) and stable isotopes (δ¹³C and δ¹⁵N in all tissues but fat). PBDEs could be found in only one sample (L. weddellii fat). Generally, PCBs (from 74 to 523 ng g⁻¹ lw), DDTs (from 14 to 168 ng g⁻¹ lw) and chlordanes (from 9 to 78 ng g⁻¹ lw) were the prevailing compounds. Results showed a clear stratification in accordance with ecological data. Nonetheless, stable isotope analyses provide a deeper insight into fluctuations due to migrations and nutritional stress. Correlation between δ(15)N and pollutants suggests, to some degree, a considerable ability to metabolize and/or excrete the majority of them.
本研究采集了来自南极洲乔治王岛的 2 只威德尔海豹（Leptonychotes weddellii）、2 只食蟹海豹（Lobodon carcinophagus）、3 只南极软毛海豹（Arctocephalus gazella）和 1 只南方象海豹（Mirounga leonina）的脂肪、皮肤、肝脏和肌肉样本，用于分析持久性有机污染物（POPs，包括多氯联苯、有机氯农药和 PBDEs）和稳定同位素（除脂肪外，所有组织均分析了 δ¹³C 和 δ¹⁵N）。仅在一个威德尔海豹的脂肪样本中检测到 PBDEs。一般来说，多氯联苯（74-523ng/g 鲜重）、滴滴涕（14-168ng/g 鲜重）和氯丹（9-78ng/g 鲜重）是主要的污染物。研究结果与生态数据明显一致，表现出明显的分层。然而，稳定同位素分析提供了对由于迁徙和营养压力引起的波动的更深入了解。δ¹⁵N 与污染物之间的相关性表明，海豹在一定程度上具有代谢和/或排泄大多数污染物的能力。
