Selenium and mercury concentrations in harbor seals (Phoca vitulina) from central California: Health implications in an urbanized estuary. McHuron, E., A., Harvey, J., T., Castellini, J., M., Stricker, C., A., & O'Hara, T., M. Marine Pollution Bulletin, 83(1):48-57, Elsevier Ltd, 2014.
Selenium and mercury concentrations in harbor seals (Phoca vitulina) from central California: Health implications in an urbanized estuary [link]Website  abstract   bibtex   
We measured total selenium and total mercury concentrations ([TSe] and [THg]) in hair (n= 138) and blood (n= 73) of harbor seals (Phoca vitulina) from California to assess ariation by geography and sex, and inferred feeding relationships based on carbon, nitrogen, and sulfur stable isotopes. Harbor seals from Hg-contaminated sites had significantly greater [THg], and lesser [TSe] and TSe:THg molar ratios than seals from a relatively uncontaminated site. Males had significantly greater [THg] than females at all locations. Sulfur stable isotope values explained approximately 25% of the variability in [THg], indicating increased Hg exposure for seals with a greater use of estuarine prey species. Decreased [TSe] in harbor seals from Hg-contaminated regions may indicate a relative Se deficiency to mitigate the toxic effects of Hg. Further investigation into the Se status and the potential negative impact of Hg on harbor seals from Hg-contaminated sites is warranted. © 2014 Elsevier Ltd.
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 title = {Selenium and mercury concentrations in harbor seals (Phoca vitulina) from central California: Health implications in an urbanized estuary},
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 year = {2014},
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 abstract = {We measured total selenium and total mercury concentrations ([TSe] and [THg]) in hair (n= 138) and blood (n= 73) of harbor seals (Phoca vitulina) from California to assess ariation by geography and sex, and inferred feeding relationships based on carbon, nitrogen, and sulfur stable isotopes. Harbor seals from Hg-contaminated sites had significantly greater [THg], and lesser [TSe] and TSe:THg molar ratios than seals from a relatively uncontaminated site. Males had significantly greater [THg] than females at all locations. Sulfur stable isotope values explained approximately 25% of the variability in [THg], indicating increased Hg exposure for seals with a greater use of estuarine prey species. Decreased [TSe] in harbor seals from Hg-contaminated regions may indicate a relative Se deficiency to mitigate the toxic effects of Hg. Further investigation into the Se status and the potential negative impact of Hg on harbor seals from Hg-contaminated sites is warranted. © 2014 Elsevier Ltd.},
 bibtype = {article},
 author = {McHuron, Elizabeth A. and Harvey, James T. and Castellini, J. Margaret and Stricker, Craig A. and O'Hara, Todd M.},
 journal = {Marine Pollution Bulletin},
 number = {1}
}

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