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. Issue 1 (15th April 2016)

• Record Type: Journal Article
• Authors: Jeong, Yunsun; Kim, Sang-Jo; Shin, Kyung-Hoon; Hwang, Seung Yong; An, Yong-Rock; Moon, Hyo-Bang
• Is Part Of: Marine pollution bulletin. Volume 105:Issue 1(2016:Apr.)
• Page Start: 30
• Page End: 36
• Publication Date: 2016-04-15
• Subjects: PCDD/Fs -- TEQs -- Stockholm Convention -- Marine mammal -- Temporal trend; Marine pollution -- Periodicals; Marine Biology -- Periodicals; Water Pollution -- Periodicals; Mer -- Pollution -- Périodiques; Publications périodiques; Pollution des mers; Lutte antipollution; Electronic journals; 363.7394
• DOI: 10.1016/j.marpolbul.2016.03.007
• Languages: English
• ISSNs: 0025-326X

Abstract

Abstract: 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, PCDFs, 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. Graphical abstract: Highlights: TEQ concentrations in finless porpoises were lower than the threshold values for marine mammals. Age and sex-dependent accumulation pattern were found for dioxin-like contaminants. Greater than 50% reduction rates were observed for PCDD/Fs and dioxin-like PCBs in time-gap porpoise samples. Regulation on PCDD/Fs has been effective for marine mammals in Korea.