Swanson, Heidi K; Gantner, Nikolaus; Kidd, Karen A; Muir, Derek C G; Reist, James D (2011): Life-history traits of two Salvelinus species and mercury concentrations in fish and prey in ten Canadian lakes (2006-2008) [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.837319, Supplement to: Swanson, HK et al. (2011): Comparison of mercury concentrations in landlocked, resident, and sea-run fish (Salvelinus spp.) from Nunavut, Canada. Environmental Toxicology and Chemistry, 30(6), 1459-1467, https://doi.org/10.1002/etc.517
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Abstract:
Mercury concentrations ([Hg]) in Arctic food fish 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 fish have lower [Hg] than nonanadromous fish, but there have been no intraregional comparisons. Also, 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 have been published. Using intraregional data from 10 lakes in the West Kitikmeot area of Nunavut, Canada, we found that [Hg] varied significantly among 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 [Hg] (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 no significant difference in [Hg] was seen 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 fish.
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Coverage:
Median Latitude: 68.701694 * Median Longitude: -106.707389 * South-bound Latitude: 68.052000 * West-bound Longitude: -107.710000 * North-bound Latitude: 69.380000 * East-bound Longitude: -106.240000
Comment:
Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150
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Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
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2 datasets
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Datasets listed in this publication series
- Swanson, HK; Gantner, N; Kidd, KA et al. (2011): (Tables 1, 2) Life history of fish, and chlorophyll a and methylmercury of zooplankton in ten Canadian lakes. https://doi.org/10.1594/PANGAEA.837318
- Swanson, HK; Gantner, N; Kidd, KA et al. (2011): (Table S1) Fork length, wet weight, age, isotopic ratios and mercury concentration in two Salvelinus species sampled in ten Canadian lakes. https://doi.org/10.1594/PANGAEA.837315