Polychlorinated biphenyl congener distributions in burbot: evidence for a latitude effect

Environmental Toxicology and Chemistry
By: , and 

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Abstract

We compared the distributions of the congeners of polychlorinated biphenyls (PCBs) detected in whole-body samples of burbot (Lota lota) from Great Slave Lake and Lake Erie. Total PCB concentrations in Great Slave Lake burbot were about 1/60 of the concentrations in Lake Erie burbot. Burbot from Great Slave Lake contained a higher proportion of lower-chlorinated (2-6 chlorines) congeners than did burbot from Lake Erie; the reverse occurred for more highly chlorinated (7-9 chlorines) congeners. Hexachloro congeners, followed by pentachloro congeners, dominated the proportions of total PCB in burbot from both lakes. There were no differences between sexes in whole-body samples or between gonad and somatic tissues in the proportions of the 39 congeners and three sets of co-eluters detected in burbot from Great Slave Lake. In contrast, there were distinct sex differences in congener distributions for older burbot from Lake Erie. Our results generally supported a prediction of higher proportions of lower-chlorinated PCB homologs in organisms in remote polar areas. However, the latitudinal effect on PCB congener distribution may be more complex than that portrayed in previous studies.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Polychlorinated biphenyl congener distributions in burbot: evidence for a latitude effect
Series title Environmental Toxicology and Chemistry
DOI 10.1002/etc.2703
Volume 33
Issue 11
Year Published 2014
Language English
Publisher Wiley
Contributing office(s) Great Lakes Science Center
Description 7 p.
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Environmental Toxicology and Chemistry
First page 2448
Last page 2454
Country Canada;United States
Other Geospatial Lake Erie;Great Slave Lake