title: Accumulation patterns of polychlorinated biphenyl congeners and organochlorine pesticides in Steller's sea eagles and white-tailed sea eagles, threatened species, in Hokkaido, Japan.
abstract: Polychlorinated biphenyls (PCBs), including coplanar congeners, hexachlorocyclohexane isomers, chlordane-related compounds, and hexachlorobenzene, were found in the breast muscle of Steller's sea eagles (SSE) and white-tailed sea eagles (WSE) threatened species, collected in Hokkaido, Japan, during the two years from 1998 to 1999. Both PCBs and DDTs were the most notable compounds, with concentrations one to two orders of magnitude higher than the other compounds, that is, from 120 to 39,000 and from 68 to 15,000 ng/g wet weight, respectively. Non-ortho (International Union of Pure and Applied Chemistry [IUPAC] 77, 126, and 169) and mono-ortho (IUPAC 105, 118, and 156)-substituted coplanar PCB congeners amounted to 9.2 to 740 pg/g of 2,3,7,8-tetrachlorodibenzo-p-dioxin toxic equivalents derived from the World Health Organization, Paris, France (WHO), toxic equivalent factors. The atmospheric PCBs and DDTs in eastern Siberian cities, such as Khabarovsk and Magadan, have been reported to be much higher than Hokkaido and the North Pacific. Thus, we speculated that the eagles might have been contaminated in these areas, where they spend most of the year except winter, which they spend in eastern Siberia. Adult eagles accumulated more PCBs and DDTs than younger ones. The patterns of PCB congeners were also found to change, depending on the age of the eagle examined; adult eagles showed relatively higher proportions of highly chlorinated PCBs thanjuvenile eagles did. This difference would be related to the efficiency of the excretion and the metabolism of each PCB congener in the eagles.
authors.affiliation: Department of Environmental Veterinary Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Japan.
authors.forename: Kentaro Q
authors.initials: KQ
authors.lastname: Sakamoto
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Kunisue
authors.forename: Mafumi
authors.initials: M
authors.lastname: Watanabe
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Masuda
authors.forename: Hisato
authors.initials: H
authors.lastname: Iwata
authors.forename: Shinsuke
authors.initials: S
authors.lastname: Tanabe
authors.forename: Fumiaki
authors.initials: F
authors.lastname: Akahori
authors.forename: Mayumi
authors.initials: M
authors.lastname: Ishizuka
authors.forename: Akio
authors.initials: A
authors.lastname: Kazusaka
authors.forename: Shoichi
authors.initials: S
authors.lastname: Fujita
mesh_terms: D000367:Age Factors; D000818:Animals; D004781:Environmental Exposure; D004785:Environmental Pollutants / Q000493:pharmacokinetics*; D005260:Female; D007306:Insecticides / Q000493:pharmacokinetics*; D008297:Male; D009068:Movement; D011078:Polychlorinated Biphenyls / Q000493:pharmacokinetics*; D020304:Raptors; D014018:Tissue Distribution
chemical_list: D004785:Environmental Pollutants; D007306:Insecticides; D011078:Polychlorinated Biphenyls