Document Detail

Inter- and intraclutch variation in egg mercury levels in marine bird species from the Canadian Arctic.
MedLine Citation:
PMID:  19962722     Owner:  NLM     Status:  MEDLINE    
Mercury (Hg) is a toxic metal that has been of increasing concern in the Canadian Arctic. We measured total Hg in eggs of three marine birds (Arctic terns Sterna paradisaea, common eiders Somateria mollissima borealis, long-tailed ducks Clangula hyemalis) that breed in the Canadian Arctic, to compare Hg laying order effects from the same clutch and to examine Hg among species. Early-laid eggs of all three species had 24-48% higher Hg concentrations than late laid eggs. Arctic terns had approximately twice the concentration of Hg in their eggs as the two duck species, and Hg in eider eggs from the High Arctic was higher than Hg in eggs from the Low Arctic. Higher Hg in tern eggs was consistent with this species occupying a higher trophic position in marine food webs, as indicated by stable nitrogen isotope (delta(15)N) values. The egg-laying sequence may need to be considered for Hg biomonitoring studies where small samples sizes are planned, and early eggs may be preferable for such studies since early eggs may be more representative of potential maximum levels of Hg in the marine food webs.
Jason A Akearok; Craig E Hebert; Birgit M Braune; Mark L Mallory
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-12-04
Journal Detail:
Title:  The Science of the total environment     Volume:  408     ISSN:  1879-1026     ISO Abbreviation:  Sci. Total Environ.     Publication Date:  2010 Jan 
Date Detail:
Created Date:  2010-01-19     Completed Date:  2010-03-16     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0330500     Medline TA:  Sci Total Environ     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  836-40     Citation Subset:  IM    
Copyright Information:
Crown Copyright 2009. Published by Elsevier B.V. All rights reserved.
Canadian Wildlife Service, Environment Canada, Iqaluit, NU, Canada X0A 0H0.
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MeSH Terms
Arctic Regions
Birds / physiology*
Environmental Monitoring / methods
Environmental Pollutants / analysis,  metabolism*
Food Chain
Mercury Compounds / analysis,  metabolism*
Ovum / chemistry,  metabolism*
Reproducibility of Results
Reproduction / physiology*
Species Specificity
Reg. No./Substance:
0/Environmental Pollutants; 0/Mercury Compounds

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

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