Document Detail


Comparison of mercury concentrations in landlocked, resident, and sea-run fishes (Salvelinus spp.) from Nunavut, Canada.
MedLine Citation:
PMID:  21381088     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Mercury concentrations ([Hg]) in Arctic food fishes often exceed guidelines for human subsistence consumption. Previous research on two food fish species, Arctic char (Salvelinus alpinus) and lake trout (Salvelinus namaycush), indicates that anadromous fishes have lower [Hg] than non-anadromous fishes, but there have been no intraregional comparisons. Also, there have been no comparisons of [Hg] among anadromous (sea-run), resident (marine access but do not migrate), and landlocked (no marine access) life history types of Arctic char and lake trout. Using intraregional data from 10 lakes in the West Kitikmeot area of Nunavut, Canada, we found that [Hg] varied significantly between species and life history types. Differences among species-life history types were best explained by age-at-size and C:N ratios (indicator of lipid); [Hg] was significantly and negatively related to both. At a standardized fork length of 500 mm, lake trout had significantly higher [Hg] (mean 0.17 µg/g wet wt) than Arctic char (0.09 µg/g). Anadromous and resident Arctic char had significantly lower mercury (each 0.04 µg/g) than landlocked Arctic char (0.19 µg/g). Anadromous lake trout had significantly lower [Hg] (0.12 µg/g) than resident lake trout (0.18 µg/g), but there was no significant difference in [Hg] between landlocked lake trout (0.21 µg/g) and other life history types. Our results are relevant to human health assessments and consumption guidance, and will inform models of Hg accumulation in Arctic fishes. Environ. Toxicol. Chem. © 2011 SETAC.
Authors:
Heidi Swanson; Nikolaus Gantner; Karen A Kidd; D C G Muir; James D Reist
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-3-4
Journal Detail:
Title:  Environmental toxicology and chemistry / SETAC     Volume:  -     ISSN:  1552-8618     ISO Abbreviation:  -     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-3-7     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8308958     Medline TA:  Environ Toxicol Chem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 SETAC.
Affiliation:
anadian Rivers Institute and Biology Department, University of New Brunswick, Saint John, New Brunswick; Fisheries and Oceans Canada, Freshwater Institute, Winnipeg, Manitoba. heidikswanson@yahoo.ca.
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