Show simple item record Miranda Filho, Kleber Campos Metcalfe, Chris Metcalfe, Tracy L. Muelbert, Monica Mathias Costa Martínez, Pablo Elías Robaldo, Ricardo Berteaux Colares, Elton Pinto Bianchini, Adalto 2011-01-05T12:50:20Z 2011-01-05T12:50:20Z 2009
dc.identifier.citation MIRANDA FILHO, K. C. et al. Lactational transfer of PCBs and chlorinated pesticides in pups of southern elephant seals (Mirounga leonina) from Antarctica. Chemosphere, Oxford, v. 75, p. 610-616, 2009. Disponível em: <>. Acesso em: 05 jan. 2010. pt_BR
dc.identifier.issn 0045-6535
dc.description.abstract Seven pairs of southern elephant seals (Mirounga leonina) pups and their dams were sampled during the late weaning season among a breeding population of seals on Elephant Island in Antarctica. The blubber of the pups and the milk and blubber of their dams were analyzed for lipid-normalized concentrations of PCBs and organochlorines compounds in order to evaluate the lactational transfer of these contaminants. The lipid-normalized concentrations in these tissues were in the ppb range (i.e., ng g1 lipid). The levels of contaminants in southern elephant seals were low in comparison with residues that have been reported in pinnipeds from the northern hemisphere. The relative tissue concentrations of the analytes measured followed the pattern: RDDT > mirex > RPCB > Rchlordane > HCB > heptachlor epoxide > diel- drin > methoxychlor > RHCH > other organochlorines. The very high DDE/RDDT ratio (0.91) in the blub-ber of dams and pups was an indicative of long-term, extremely distant pollution. On the other hand, the relatively high levels of some other organochlorine pesticides (e.g. mirex, heptachlor epoxide, dieldrin, methoxychor) may reflect the continued use of these insecticides in developing countries located in the southern hemisphere. For most of the analytes measured, the lipid-normalized concentrations were lower in pup blubber and in the milk than in the maternal blubber. Lactational transfer rates were depen-dent on the logKow (octanol/water partition coefficient) values of the analytes measured, less lipophilic compounds being more readily transferred to the pups by the lactational route. pt_BR
dc.language.iso eng pt_BR
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dc.subject Lactation pt_BR
dc.subject Organochlorines pt_BR
dc.subject Mirounga leonina pt_BR
dc.subject Elephant seals pt_BR
dc.subject Antarctica pt_BR
dc.title Lactational transfer of PCBs and chlorinated pesticides in pups of southern elephant seals (Mirounga leonina) from Antarctica pt_BR
dc.type article pt_BR

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