Long-term trends of polychlorinated biphenyls and chlorinated pesticides in franciscana dolphin (Pontoporia blainvillei) from Southern Brazil.
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.
Leonel
Juliana
J
Laboratório de Química Orgânica Marinha, IO-USP, São Paulo, SP 05508-900, Brazil. juoceano@yahoo.com.br
Sericano
Jose L
JL
Fillmann
Gilberto
G
Secchi
Eduardo
E
Montone
Rosalinda C
RC
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*
D006843:Hydrocarbons, Chlorinated; D010573:Pesticide Residues; D010575:Pesticides; D014874:Water Pollutants, Chemical; D006581:Hexachlorobenzene; D003634:DDT; D011078:Polychlorinated Biphenyls; D004026:Dieldrin; D008917:Mirex