Document Detail

Persistent organic pollutants in the diet of harbor seals (Phoca vitulina) inhabiting Puget Sound, Washington (USA), and the Strait of Georgia, British Columbia (Canada): a food basket approach.
MedLine Citation:
PMID:  16268158     Owner:  NLM     Status:  MEDLINE    
Harbor seals (Phoca vitulina) inhabiting Puget Sound (WA, USA) recently were found to be seven times more contaminated with polychlorinated biphenyls (PCBs) than those inhabiting the adjacent Strait of Georgia (BC, Canada). We carried out a food basket approach to approximate realistic dietary exposures of both new (e.g., polybrominated diphenyl ethers [PBDEs]) and legacy (e.g., dichlorodiphenyltrichloroethane [DDT]) persistent organic pollutants (POPs) for these harbor seals. Food basket homogenates, each consisting of over 200 individual prey items, were constructed using documented dietary preferences for harbor seals in these basins, and analyzed for organochlorine pesticides, flame retardants, and other persistent contaminants. Concentration rankings for the major contaminant classes in the Puget Sound food basket were sigmaPCBs > sigmaPBDEs > sigmaDDT, and for the Strait of Georgia food basket were sigmaPCBs > sigmaDDT > sigmaPBDEs, highlighting the emergence of PBDEs as a significant concern in the regional environment. Consistent with observations in harbor seals, PCB concentrations in the Puget Sound food basket were seven times higher than in its Strait of Georgia counterpart. Based on our food basket results, the estimated daily intake of sigmaPCB toxic equivalents to dioxin by Puget Sound harbor seals exceeds some wildlife consumption guidelines for PCBs. Our results indicate that both legacy and new POPs present a health risk to these marine mammals.
Donna L Cullon; Steven J Jeffries; Peter S Ross
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Environmental toxicology and chemistry / SETAC     Volume:  24     ISSN:  0730-7268     ISO Abbreviation:  Environ. Toxicol. Chem.     Publication Date:  2005 Oct 
Date Detail:
Created Date:  2005-11-04     Completed Date:  2006-01-27     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8308958     Medline TA:  Environ Toxicol Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2562-72     Citation Subset:  IM    
Institute of Ocean Sciences, Fisheries and Oceans Canada, 9860 West Saanich Road, P.O. Box 6000, Sidney, British Columbia V8L 4B2.
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MeSH Terms
British Columbia
DDT / analysis*
Environmental Exposure
Environmental Monitoring
Environmental Pollutants / analysis*
Food Chain*
Phoca / physiology*
Polybrominated Biphenyls / analysis*
Polychlorinated Biphenyls / analysis*
Reg. No./Substance:
0/Environmental Pollutants; 0/Polybrominated Biphenyls; 0/Polychlorinated Biphenyls; 50-29-3/DDT

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