Composition of chlorinated hydrocarbon contaminants among major adipose tissue depots of polar bears (Ursus maritimus) from the Canadian high Arctic

التفاصيل البيبلوغرافية
العنوان: Composition of chlorinated hydrocarbon contaminants among major adipose tissue depots of polar bears (Ursus maritimus) from the Canadian high Arctic
المؤلفون: Malcolm A. Ramsay, Jonathan Verreault, Robert J. Letcher, Ross J. Norstrom, Michael Mulvihill
المصدر: Science of The Total Environment. 370:580-587
بيانات النشر: Elsevier BV, 2006.
سنة النشر: 2006
مصطلحات موضوعية: Male, Insecticides, Environmental Engineering, Ursus maritimus, Hexachlorocyclohexane, Adipose tissue, Dieldrin, chemistry.chemical_compound, biology.animal, Hydrocarbons, Chlorinated, Animals, Environmental Chemistry, Waste Management and Disposal, biology, Arctic Regions, Chemistry, Polychlorinated biphenyl, Pesticide, Pollution, Congener, Adipose Tissue, Arctic, Environmental chemistry, Environmental Pollutants, Ursidae, Environmental Monitoring
الوصف: Monitoring of environmental contaminants in Canadian Arctic polar bears (Ursus maritimus) typically has used superficial adipose tissue samples collected as part of controlled native subsistence hunts. However, little attention has been paid to the compositional difference in contaminants that may exist among the major adipose depots that are routinely collected. To address this knowledge gap, we investigated the profiles and concentrations of chlorinated hydrocarbon contaminants (CHCs), including major polychlorinated biphenyl (PCB) congeners and organochlorine (OC) pesticides and metabolites, in six major adipose depots (i.e. superficial, inter-muscular and intra-abdominal regions) obtained from adult male polar bears in the vicinity of Resolute Bay, Canadian high Arctic. Concentrations and congener patterns of PCBs (20 congeners) and OCs (14 compounds; chlordanes and dichlorodiphenyltrichloroethanes and metabolites, chlorinated benzenes, hexachlorocyclohexane isomers, octachlorostyrene and dieldrin) were found to be relatively uniform throughout the adipose tissue of male polar bears. The only exception was the inter-muscular adipose depot from the cervical region, which was characterized, compared to other major depots routinely sampled, by lower proportions of higher-chlorinated and recalcitrant congeners such as CB170/190, 180, 194 and 206, and higher contribution of the lower-chlorinated PCBs, CB47, 74 and 99. No difference in the OC makeup and concentrations was found among the adipose depots investigated. In view of this, we conclude that the determination of CHCs in adipose tissue of polar bears from any major depots, with the potential exception of the fat under the neck muscles, would give a representative picture of the overall CHC composition and concentrations in polar bear fat for purpose of trend monitoring.
تدمد: 0048-9697
DOI: 10.1016/j.scitotenv.2006.07.037
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::34591d635bbbb7f41811f6700c56b859
https://doi.org/10.1016/j.scitotenv.2006.07.037
Rights: CLOSED
رقم الانضمام: edsair.doi.dedup.....34591d635bbbb7f41811f6700c56b859
قاعدة البيانات: OpenAIRE
الوصف
تدمد:00489697
DOI:10.1016/j.scitotenv.2006.07.037