title: Organohalogen contaminants in striped dolphins (Stenella coeruleoalba) from Japan: present contamination status, body distribution and temporal trends (1978-2003).
abstract: Organohalogen contaminants including PCBs, DDTs, CHLs, HCHs, HCB, PBDEs and HBCDs were determined in striped dolphins (Stenella coeruleoalba) found stranded at Gogo-shima (n=6, 2003) and collected from Taiji (n=15, 1978-1992) in Japan. All target compounds were significantly detected in all the specimens, indicating ubiquitous contamination of oceanic cetaceans in northwest Pacific Ocean. Examination of body distribution of organohalogens in the six specimens from Gogo-shima showed no significant difference in concentrations among the analyzed tissues, except for brain, which had lower levels possibly due to the existence of blood-brain barrier. For evaluating temporal trends, archived blubber samples of adult male stripped dolphins collected in 1978, 1979, 1986 and 1992 were analyzed. Concentrations of PCBs, DDTs and HCHs did not change significantly during 1978-2003. In contrast, remarkable increasing trends of PBDEs and HBCDs were observed, suggesting growing consumption in Japan and surrounding countries in recent years.
authors.affiliation: Center for Marine Environmental Studies (CMES), Ehime University, Bunkyo-cho 2-5, Matsuyama 790-8577, Japan.
authors.forename: Tomohiko
authors.initials: T
authors.lastname: Isobe
authors.forename: Yoko
authors.initials: Y
authors.lastname: Ochi
authors.forename: Karri
authors.initials: K
authors.lastname: Ramu
authors.forename: Takahito
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Yuko
authors.initials: Y
authors.lastname: Tajima
authors.forename: Tadasu K
authors.initials: TK
authors.lastname: Yamada
authors.forename: Masao
authors.initials: M
authors.lastname: Amano
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Miyazaki
authors.forename: Shin
authors.initials: S
authors.lastname: Takahashi
authors.forename: Shinsuke
authors.initials: S
authors.lastname: Tanabe
mesh_terms: D000818:Animals; D004784:Environmental Monitoring; D006846:Hydrocarbons, Halogenated / Q000737:chemistry* / Q000493:pharmacokinetics*; D007564:Japan; D050706:Stenella; D013997:Time Factors; D014018:Tissue Distribution; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000493:pharmacokinetics*
chemical_list: D006846:Hydrocarbons, Halogenated; D014874:Water Pollutants, Chemical