title: Contamination by persistent organochlorines in cetaceans incidentally caught along Brazilian coastal waters.
abstract: Wide ranges of organochlorine residues were determined in the blubber of franciscana (Pontoporia blainvillei), estuarine dolphin (Sotalia guianensis), Atlantic spotted dolphin (Stenella frontalis), and long-beaked common dolphin (Delphinus capensis) incidentally caught along Brazilian coastal waters. Concentrations of DDTs and PCBs were the highest, followed by CHLs, TCPMOH, dieldrin, TCPMe, heptachlor epoxide, HCB, and HCHs. Unexpectedly, significant pollution of PCBs, DDTs, TCPMe, and TCPMOH were observed in cetaceans from Brazil, implying the occurrence of local sources in the Southern Hemisphere comparable to those in the Northern Hemisphere, probably by high industrialization in Brazil. On the other hand, CHLs, HCB, HCHs, heptachlor epoxide, and dieldrin residue levels in Brazilian dolphins were much lower than those in other species from the Northern Hemisphere. Significant correlations of TCPMe and TCPMOH were found along with PCBs and DDTs, indicating the highly bioaccumulative nature of all these compounds and/or possible similar pollution sources.
authors.affiliation: Center for Marine Environmental Studies, Ehime University, 3-5-7 Tarumi, Matsuyama 790-8566, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Kajiwara
authors.forename: S
authors.initials: S
authors.lastname: Matsuoka
authors.forename: H
authors.initials: H
authors.lastname: Iwata
authors.forename: S
authors.initials: S
authors.lastname: Tanabe
authors.forename: F C W
authors.initials: FC
authors.lastname: Rosas
authors.forename: G
authors.initials: G
authors.lastname: Fillmann
authors.forename: J W
authors.initials: JW
authors.lastname: Readman
mesh_terms: D000818:Animals; D001938:Brazil; D004289:Dolphins; D004784:Environmental Monitoring; D004785:Environmental Pollutants / Q000032:analysis / Q000493:pharmacokinetics*; D007220:Industrial Waste; D007306:Insecticides / Q000032:analysis / Q000493:pharmacokinetics*; D011078:Polychlorinated Biphenyls / Q000032:analysis / Q000493:pharmacokinetics*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000493:pharmacokinetics*
chemical_list: D004785:Environmental Pollutants; D007220:Industrial Waste; D007306:Insecticides; D014874:Water Pollutants, Chemical; D011078:Polychlorinated Biphenyls