Document Detail

The trophodynamics of PCBs, including mono- and non-ortho congeners, in the food web of North-Central Lake Ontario.
MedLine Citation:
PMID:  9241874     Owner:  NLM     Status:  MEDLINE    
The distribution of polychlorinated biphenyls (PCBs) in the food-web of Lake Ontario was studied to determine the parameters that control the trophodynamics of PCB congeners; including toxic non-ortho and mono-ortho PCBs. 'Biomagnification' of PCBs was evident in the food-web as total PCBs increased through trophic levels when concentrations were calculated on both a wet wt. and lipid weight basis; although there was no evidence of biomagnification between forage fish and piscivorous fish. Biomagnification was greatest for congeners with log octanol-water partition (log Kow) coefficients between 6 and 7.5. Non-ortho congeners 77 and 126, and congener 151 were not biomagnified to the extent of other congeners with similar Kow, which was attributed to high rates of metabolic clearance of these compounds. The Toxic Equivalent Quantities (TEQs) associated with non-ortho and mono-ortho PCBs increased throughout the Lake Ontario food-web. The high TEQ observed in herring gull eggs was primarily the result of very high concentrations of congener 126 in this component of the food web.
T L Metcalfe; C D Metcalfe
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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:  201     ISSN:  0048-9697     ISO Abbreviation:  Sci. Total Environ.     Publication Date:  1997 Aug 
Date Detail:
Created Date:  1997-08-21     Completed Date:  1997-08-21     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0330500     Medline TA:  Sci Total Environ     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  245-72     Citation Subset:  IM    
Environmental and Resource Studies Program, Trent University, Peterborough, Ontario, Canada.
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MeSH Terms
Animal Feed / analysis*
Chromatography, Gas
Fresh Water / chemistry
Geologic Sediments / chemistry
Great Lakes Region
Polychlorinated Biphenyls / analysis*
Water Pollutants, Chemical / analysis*
Reg. No./Substance:
0/Polychlorinated Biphenyls; 0/Water Pollutants, Chemical

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

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