title: 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.
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 1.8pgTEQ/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.
authors.affiliation: Department of Marine Sciences and Convergent Technology, Hanyang University, Ansan 426-791, Republic of Korea.
authors.forename: Yunsun
authors.initials: Y
authors.lastname: Jeong
authors.affiliation: National Fisheries Products Quality Management Service (FiQ), Busan 606-080, Republic of Korea.
authors.forename: Sang-Jo
authors.initials: SJ
authors.lastname: Kim
authors.affiliation: Department of Marine Sciences and Convergent Technology, Hanyang University, Ansan 426-791, Republic of Korea.
authors.forename: Kyung-Hoon
authors.initials: KH
authors.lastname: Shin
authors.affiliation: Department of Bio-Nanotechnology/Molecular and Life Science, Hanyang University, Ansan 426-791, Republic of Korea.
authors.forename: Seung Yong
authors.initials: SY
authors.lastname: Hwang
authors.affiliation: Cetacean Research Institute (CRI), National Institute of Fisheries Science (NIFS), Ulsan 680-050, Republic of Korea.
authors.forename: Yong-Rock
authors.initials: YR
authors.lastname: An
authors.affiliation: Department of Marine Sciences and Convergent Technology, Hanyang University, Ansan 426-791, Republic of Korea. Electronic address: hbmoon@hanyang.ac.kr.
authors.forename: Hyo-Bang
authors.initials: HB
authors.lastname: Moon
mesh_terms: D000818:Animals; D001572:Benzofurans; D002591:Cetacea; D000072318:Dibenzofurans / Q000032:analysis / Q000378:metabolism*; D004147:Dioxins / Q000032:analysis / Q000378:metabolism*; D004784:Environmental Monitoring; D005260:Female; D011078:Polychlorinated Biphenyls / Q000032:analysis / Q000378:metabolism*; D000072317:Polychlorinated Dibenzodioxins / Q000032:analysis / Q000378:metabolism*; D019576:Porpoises / Q000378:metabolism*; D056910:Republic of Korea; D014874:Water Pollutants, Chemical / Q000378:metabolism*
chemical_list: D001572:Benzofurans; D000072318:Dibenzofurans; D004147:Dioxins; D000072317:Polychlorinated Dibenzodioxins; D014874:Water Pollutants, Chemical; D011078:Polychlorinated Biphenyls
keywords: Marine mammal; PCDD/Fs; Stockholm Convention; TEQs; Temporal trend