title: Contamination status of POPs and BFRs and relationship with parasitic infection in finless porpoises (Neophocaena phocaenoides) from Seto Inland Sea and Omura Bay, Japan.
abstract: Contamination status of brominated flame retardants (BFRs) and persistent organic pollutants (POPs) in blubber of finless porpoises (Neophocaena phocaenoides) stranded along the coasts of Seto Inland Sea and Omura Bay in Japan were investigated. Levels of PCBs, DDTs and CHLs were significantly higher than those of HCHs, HCB, PBDEs and HBCDs. Concentrations of PBDEs and HBCDs, as well as organochlorine compounds in males increased with body length (p<0.05). Among 14 PBDE congeners analyzed, BDE-47 was the predominant, which is similar to those generally reported in biota. PBDEs, HBCDs and PCBs showed no obvious temporal trend in concentrations during the study period, suggesting continuous environmental release of these chemicals. On the other hand, levels of DDT, CHLs and HCHs have decreased. Concentrations of PCBs in liver trematode infected individuals were significantly higher than those in not infected individuals, implying there could be a relationship between contaminant levels and parasitic infection.
authors.affiliation: Center for Marine Envioronmental Studies (CMES), Ehime University, Bunkyo-cho 2-5, Matuyama 790-8577, Japan. t.isobe@agr.ehim-u.ac.jp
authors.forename: Tomohiko
authors.initials: T
authors.lastname: Isobe
authors.forename: Tomoko
authors.initials: T
authors.lastname: Oshihoi
authors.forename: Hiroki
authors.initials: H
authors.lastname: Hamada
authors.forename: Kei
authors.initials: K
authors.lastname: Nakayama
authors.forename: Tadasu K
authors.initials: TK
authors.lastname: Yamada
authors.forename: Yuko
authors.initials: Y
authors.lastname: Tajima
authors.forename: Masao
authors.initials: M
authors.lastname: Amano
authors.forename: Shinsuke
authors.initials: S
authors.lastname: Tanabe
mesh_terms: D000273:Adipose Tissue / Q000378:metabolism; D000818:Animals; D004781:Environmental Exposure / Q000706:statistics & numerical data; D005260:Female; D005411:Flame Retardants / Q000378:metabolism*; D006842:Hydrocarbons, Brominated / Q000378:metabolism; D007564:Japan; D008297:Male; D009792:Oceans and Seas; D009930:Organic Chemicals / Q000378:metabolism*; D010273:Parasitic Diseases, Animal / Q000453:epidemiology*; D019576:Porpoises / Q000378:metabolism* / Q000469:parasitology; D012623:Seawater / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000378:metabolism*
chemical_list: D005411:Flame Retardants; D006842:Hydrocarbons, Brominated; D009930:Organic Chemicals; D014874:Water Pollutants, Chemical; C089796:hexabromocyclododecane