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Title
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Accumulation and temporal changes of PCDD/Fs and dioxin-like PCBs in finless porpoises (Neophocaena asiaeorientalis) from Korean coastal waters : tracking the effectiveness of regulation
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Author
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Abstract
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| Temporal trend studies are useful to evaluate the effectiveness of regulations on local pollutants. The emission of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) and dioxin-like polychlorinated biphenyls (PCBs) has been regulated by the Korean government in accordance with the Stockholm Convention. The accumulation and temporal trends of PCDD/Fs and dioxin-like PCBs were investigated in finless porpoises (Neophocaena asiaeorientalis) collected in Korean waters. Median concentrations of PCDDs, PCDFs, non-ortho PCBs, and mono-ortho PCBs were 1.0, 1.1, 0.1, and 1.8 pg TEQ/g lipid weight, respectively, which-were lower than threshold values for marine mammals. Age- and sex-dependent accumulation patterns were found for PCDFs and DL-PCBs. Temporal trends in finless porpoises collected between 2003 and 2010 showed significant reduction rates of 57%, 54%, 69%, and 60% for PCDDs, PCDF5, non-ortho PCBs, and mono-ortho PCBs, respectively. Our results suggest that the regulations on dioxin-like contaminants have been effective for marine mammals in Korea. (C) 2016 Elsevier Ltd. All rights reserved. |
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Language
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English
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Source (journal)
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Marine pollution bulletin. - London, 1970, currens
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Publication
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London
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2016
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ISSN
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0025-326X
[print]
1879-3363
[online]
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DOI
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10.1016/J.MARPOLBUL.2016.03.007
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Volume/pages
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105
:1
(2016)
, p. 30-36
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ISI
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000375816000016
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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