Correlation of Mercury Occurrence with Age, Elemental Composition, and Life History in Sea-Run Food Fish from the Canadian Arctic Archipelago's Lower Northwest Passage
| Autor: | Peter J. Van Coeverden de Groot, Bronte E. McPhedran, Iris Koch, James Qitsualik, Virginia K. Walker, Derek C. G. Muir, John M. Casselman, Stephan Schott, Kristy Moniz, Pranab Das |
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| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Coregonus clupeaformis Health (social science) cisco lake trout chemistry.chemical_element Plant Science TP1-1185 010501 environmental sciences 01 natural sciences Health Professions (miscellaneous) Microbiology Article Arctic char 14. Life underwater Sardinella isotopes 0105 earth and related environmental sciences Salvelinus Fish migration biology lake whitefish 010604 marine biology & hydrobiology Chemical technology biology.organism_classification Mercury (element) Fishery Trout Geography otoliths chemistry Arctic anadromous salmonids Food Science |
| Zdroj: | Foods Foods, Vol 10, Iss 2621, p 2621 (2021) Volume 10 Issue 11 |
| ISSN: | 2304-8158 |
| Popis: | As mercury emissions continue and climate-mediated permafrost thaw increases the burden of this contaminant in northern waters, Inuit from a Northwest passage community in the Canadian Arctic Archipelago pressed for an assessment of their subsistence catches. Sea-run salmonids (n = 537) comprising Arctic char (Salvelinus alpinus), lake trout (S. namaycush), lake whitefish (Coregonus clupeaformis), and cisco (C. autumnalis, C. sardinella) were analyzed for muscle mercury. Methylmercury is a neurotoxin and bioaccumulated with fish age, but other factors including selenium and other elements, diet and trophic level as assessed by stable isotopes of nitrogen (δ15N) and carbon (δ13C), as well as growth rate, condition, and geographic origin, also contributed depending on the species, even though all the fish shared a similar anadromous or sea-run life history. Although mean mercury concentrations for most of the species were ~0.09 µg·g−1 wet weight (ww), below the levels described in several jurisdictions for subsistence fisheries (0.2 µg·g−1 ww), 70% of lake trout were above this guideline (0.35 µg·g−1 ww), and 19% exceeded the 2.5-fold higher levels for commercial sale. We thus urge the development of consumption advisories for lake trout for the protection of pregnant women and young children and that additionally, periodic community-based monitoring be initiated. |
| Databáze: | OpenAIRE |
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