Polychlorinated Biphenyls and Their Hydroxylated Metabolites (OH-PCBs) in the Blood of Toothed and Baleen Whales Stranded along Japanese Coastal Waters
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- 作者：Kei Nomiyama ; Satoko Murata ; Tatsuya Kunisue ; Tadasu K Yamada ; Hazuki Mizukawa ; Shin Takahashi ; Shinsuke Tanabe
- 刊名：Environmental Science & Technology
- 出版年：2010
- 出版时间：May 15, 2010
- 年：2010
- 卷：44
- 期：10
- 页码：3732-3738
- 全文大小：314K
- 年卷期：v.44,no.10(May 15, 2010)
- ISSN：1520-5851
文摘
In this study, we determined the residue levels and patterns of polychlorinated biphenyls (PCBs) and hydroxylated PCBs (OH-PCBs) in the blood from eight species of toothed whales and three species of baleen whales stranded along the Japanese coast during 1999−2007. Penta- through hepta-chlorinated PCB congeners were the dominant homologue groups in all cetaceans. In contrast, specific differences in the distribution of dominant OH-PCB isomers and homologues were found among the cetacean species. In five species of toothed whales (melon-headed whale, Stejneger’s beaked whale, Pacific white-sided dolphin, Blainville’s beaked whale, and killer whale), the predominant homologues were OH-penta-PCBs followed by OH-tetra-PCBs and OH-tri-PCBs. The predominant homologues of finless porpoise and beluga whale were OH-penta-PCBs followed by OH-hexa-PCBs and OH-tri-PCBs. The predominant OH-PCB isomers were para-OH-PCBs such as 4OH-CB26, 4′OH-CB25/4′OH-CB26/4OH-CB31, 4OH-CB70, 4′OH-CB72, 4′OH-CB97, 4′OH-CB101/4′OH-CB120, and 4OH-CB107/4′OH-CB108 in toothed whales. In three baleen whales (common minke whale, Bryde’s whale, and humpback whale) and in sperm whale (which is a toothed whale), OH-octa-PCB (4OH-CB202) was the predominant homologue group accounting for 40−80% of the total OH-PCB concentrations. The differences in concentrations and profiles of OH-PCBs may suggest species-specific diets, metabolic capability, and the transthyretin (TTR) binding specificity. These results reveal that the accumulation profiles of OH-PCBs in cetacean blood are entirely different from the profiles found in pinnipeds, polar bear, and humans.