Document Detail


Geographical distribution of organochlorine pesticides (OCPs) in polar bears (Ursus maritimus) in the Norwegian and Russian Arctic.
MedLine Citation:
PMID:  12699924     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Geographical variation of organochlorine pesticides (OCPs) was studied in blood samples from 90 adult female polar bear (Ursus maritimus) from Svalbard, Franz Josef Land, Kara Sea, East-Siberian Sea and Chukchi Sea. In all regions, oxychlordane was the dominant OCP. Regional differences in mean levels of HCB, oxychlordane, trans-nonachlor, alpha-HCH, beta-HCH and p,p'-DDE were found. The highest levels of oxychlordane, trans-nonachlor and DDE were found in polar bears from Franz Josef Land and Kara Sea. HCB level was lowest in polar bears from Svalbard. Polar bears from Chukchi Sea had the highest level of alpha- and beta-HCH. The lowest alpha-HCH concentration was found in bears from Kara Sea. In all the bears, summation operator HCHs was dominated by beta-HCH. The geographical variation in OCP levels and pattern may suggest regional differences in pollution sources and different feeding habits in the different regions. Polar bears from the Western Russian Arctic were exposed to higher levels of chlordanes and p,p'-DDE than polar bears from locations westwards and eastwards from this region. This may imply the presence of a significant pollution source in the Russian Arctic area. The study suggests that the western Russian Arctic is the most contaminated region of the Arctic and warrants further research.
Authors:
E Lie; A Bernhoft; F Riget; S E Belikov; A N Boltunov; A E Derocher; G W Garner; Ø Wiig; J U Skaare
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Science of the total environment     Volume:  306     ISSN:  0048-9697     ISO Abbreviation:  Sci. Total Environ.     Publication Date:  2003 May 
Date Detail:
Created Date:  2003-04-17     Completed Date:  2003-05-13     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0330500     Medline TA:  Sci Total Environ     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  159-70     Citation Subset:  IM    
Affiliation:
National Veterinary Institute, PO Box 8156 Dep, Oslo N-0033, Norway.
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MeSH Terms
Descriptor/Qualifier:
Animals
Arctic Regions
Environmental Exposure
Environmental Pollutants / blood*,  pharmacokinetics
Female
Geography
Hydrocarbons, Chlorinated*
Insecticides / blood*,  pharmacokinetics
Norway
Russia
Ursidae*
Chemical
Reg. No./Substance:
0/Environmental Pollutants; 0/Hydrocarbons, Chlorinated; 0/Insecticides

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


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