期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 650, 期 -, 页码 1521-1528出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2018.09.070
关键词
Baleen whales; POPs; Southern Hemisphere; PCBs; PBDEs; DDTs
资金
- Global Greengrants Fund
- Rufford Foundation
- Mohamed Bin Zayed Species Conservation Fund
- Pacific Whale Foundation
- Instituto de Conservacion de Ballenas (Argentina)
- [15CAES004]
Persistent organic pollutants (POPs) were assessed for the first time in blue whales from the South Pacific Ocean. Concentrations of polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs), hexachlorobenzene (HCB) and dichlorodiphenyltrichloroethane and its main metabolites (DDTs), were determined in 40 blubber samples from 36 free-ranging individuals and one stranded, dead animal along the coast of southern Chile between 2011 and 2013. PCBs were the most abundant pollutants (2.97-975 ng/g 1.w.), followed by DDTs (3.50-537 ng/g 1.w.), HCB (nd-77.5 ng/g 1.w.) and PBDEs (nd-33.4 ng/g 1.w). There was evidence of differences between sexes, with lower loads in females potentially due to pollutants passing to calves. POP concentrations were higher in specimens sampled in 2013; yet, between-year differences were only statistically significant for HCB and PBDEs. Lower chlorinated (penta > tetra > tri) and brominated (tetra > tri) congeners were the most prevalent among PCBs and PBDEs, respectively, mostly in agreement with findings previously reported in blue and other baleen whales. The present study provides evidence of lower levels of contamination by POPs in eastern South Pacific blue whales in comparison to those reported for the Northern Hemisphere. (C) 2018 Published by Elsevier B.V.
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