title: Long-term trends of polychlorinated biphenyls and chlorinated pesticides in franciscana dolphin (Pontoporia blainvillei) from Southern Brazil.
abstract: Selected POPs were analyzed in blubber samples of Pontoporia blainvillei from Southern Brazil to appraise temporal trend over a 10 year period (1994-2004). Overall, levels of POPs were relatively low, especially when compared to Northern Hemisphere concentrations. Apart from Mirex and PCBs, which showed stable concentrations, DDTs, HCB, CHLs, Dieldrin levels presented a slight decrease over the studied period. In addition, the increase in the PCBs/DDTs ratio supports the idea that inputs of DDTs are decaying faster than PCBs.
authors.affiliation: Laboratório de Química Orgânica Marinha, IO-USP, São Paulo, SP 05508-900, Brazil. juoceano@yahoo.com.br
authors.forename: Juliana
authors.initials: J
authors.lastname: Leonel
authors.forename: Jose L
authors.initials: JL
authors.lastname: Sericano
authors.forename: Gilberto
authors.initials: G
authors.lastname: Fillmann
authors.forename: Eduardo
authors.initials: E
authors.lastname: Secchi
authors.forename: Rosalinda C
authors.initials: RC
authors.lastname: Montone
mesh_terms: D000273:Adipose Tissue / Q000378:metabolism; D000367:Age Factors; D000818:Animals; D001938:Brazil; D003634:DDT / Q000378:metabolism; D004026:Dieldrin / Q000378:metabolism; D004289:Dolphins / Q000378:metabolism*; D004784:Environmental Monitoring; D005260:Female; D005544:Forecasting; D006581:Hexachlorobenzene / Q000378:metabolism; D006843:Hydrocarbons, Chlorinated / Q000378:metabolism*; D008297:Male; D008917:Mirex / Q000378:metabolism; D010573:Pesticide Residues / Q000378:metabolism; D010575:Pesticides / Q000378:metabolism*; D011078:Polychlorinated Biphenyls / Q000378:metabolism*; D012737:Sex Factors; D014874:Water Pollutants, Chemical / Q000378:metabolism*; D014877:Water Pollution, Chemical / Q000706:statistics & numerical data*
chemical_list: D006843:Hydrocarbons, Chlorinated; D010573:Pesticide Residues; D010575:Pesticides; D014874:Water Pollutants, Chemical; D006581:Hexachlorobenzene; D003634:DDT; D011078:Polychlorinated Biphenyls; D004026:Dieldrin; D008917:Mirex