Document Detail


Residues of persistent organochlorine contaminants in southern elephant seals (Mirounga leonina) from Elephant Island, Antarctica.
MedLine Citation:
PMID:  17612156     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Contamination of blubber tissues by organochlorine pesticides (OC) and PCBs was assessed in female and male pups and juveniles, as well as in adult females and subdominant adult males of the Southern elephant seal, Mirounga leonina, from Elephant Island in the Antarctic Peninsula. All residues of persistent organochlorine contaminants analyzed were found in blubber samples, except for beta-HCH, endosulfan II, endrin, heptachlor, and aldrin. The relative concentrations of the analytes detected were sigmaDDT > sigmaPCB > sigmachlordane > mirex > dieldrin > HCB> sigmaendosulfan > methoxychlor > sigmaHCHs > other OC pesticides. OC and PCBs concentrations were 1 or 2 orders of magnitude lower than those found in pinnipeds from northern hemisphere. The ratio sigmaDDT/sigmaPCB was higher in southern elephant seals. The relative importance of some OC residues indicates that pesticides used either currently or in the recent past in countries in the southern hemisphere are the sources of contamination in the Antarctic region. Data showed that concentrations of contaminants generally increased from pups < juveniles < adults and suggested that pups accumulated contaminants through transfer from the mother seals via transplacental and lactational routes.
Authors:
Kleber C Miranda-Filho; Tracy L Metcalfe; Chris D Metcalfe; Ricardo B Robaldo; Mônica M C Muelbert; Elton P Colares; Pablo E Martinez; Adalto Bianchini
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Environmental science & technology     Volume:  41     ISSN:  0013-936X     ISO Abbreviation:  Environ. Sci. Technol.     Publication Date:  2007 Jun 
Date Detail:
Created Date:  2007-07-06     Completed Date:  2007-08-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0213155     Medline TA:  Environ Sci Technol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  3829-35     Citation Subset:  IM    
Affiliation:
Programa de Pós-Graduação em Oceanografia Biológica, Fundação Universidade Federal do Rio Grande, Av. Itália km 8, 96 201-900 Rio Grande-RS, Brazil,
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MeSH Terms
Descriptor/Qualifier:
Animals
Antarctic Regions
Environmental Exposure / analysis*
Environmental Monitoring
Female
Food Chain
Hydrocarbons, Chlorinated / analysis,  metabolism*
Male
Pesticide Residues / analysis,  metabolism*
Seals, Earless / metabolism*
Water Pollutants, Chemical / analysis,  metabolism*
Chemical
Reg. No./Substance:
0/Hydrocarbons, Chlorinated; 0/Pesticide Residues; 0/Water Pollutants, Chemical

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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