Local contamination, and not feeding preferences, explains elevated PCB concentrations in Labrador ringed seals (Pusa hispida)

The Science of the Total Environment
Tanya M BrownKen J Reimer

Abstract

Polychlorinated biphenyls (PCBs) in high trophic level species typically reflect the contributions of myriad sources, such that source apportionment is rarely possible. The release of PCBs by a military radar station into Saglek Bay, Labrador contaminated the local marine food web. For instance, while heavier (higher chlorinated) PCB profiles in some ringed seals (Pusa hispida) were previously attributed to this local source, differences in feeding preferences among seals could not be ruled out as a contributing factor. Herein, similar fatty acid profiles between those seals with 'local' PCB profiles and those with 'long-range' or background profiles indicate little support for the possibility that differential feeding ecologies underlay the divergent PCB profiles. Ringed seals appeared to feed predominantly on zooplankton (Mysis oculata and Themisto libellula), followed by the dusky snailfish (Liparis gibbus), arctic cod (Boreogadus saida), and shorthorn sculpin (Myoxocephalus scorpius). Principal components analysis (PCA) and PCB homolog profiles illustrated the extent of contamination of the Saglek food web, which had very different (and much heavier) PCB profiles than those food web members contaminated by 'long-range' sour...Continue Reading

References

Apr 4, 1994·European Journal of Pharmacology·J P BoonM T Hillebrand
Nov 30, 1998·Environmental Health Perspectives·M Van den BergT Zacharewski
Jul 8, 2000·The Science of the Total Environment·R W MacdonalG A Stern
Jul 29, 2005·Environmental Science & Technology·Katrine BorgåDerek C G Muir
Aug 9, 2005·The Science of the Total Environment·Z A KuzykK J Reimer
Sep 20, 2005·The Science of the Total Environment·Z A KuzykK J Reimer
Aug 29, 2006·Marine Environmental Research·Margaret M KrahnPaul R Wade
Jul 2, 2008·Environmental Science & Technology·L L LosetoS H Ferguson
Jul 14, 2010·Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP·Heli RouttiGeir Wing Gabrielsen
Feb 24, 2011·Environmental Science & Technology·Mark B YunkerCory Dubetz
Jun 16, 2011·Integrated Environmental Assessment and Management·Katrine BorgåDavid E Powell
Nov 19, 2011·Environmental Toxicology and Chemistry·Jean-Pierre W DesforgesLisa L Loseto
Apr 19, 2013·Environmental Science & Technology·Lin ZhangRainer Lohmann

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Citations

Jan 14, 2016·The Science of the Total Environment·Tanya M BrownDerek C G Muir

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