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

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 (<i>n</i>...

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Autores principales:	Iris Koch, Pranab Das, Bronte E. McPhedran, John M. Casselman, Kristy L. Moniz, Peter van Coeverden de Groot, James Qitsualik, Derek Muir, Stephan Schott, Virginia K. Walker
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	anadromous salmonids Arctic char lake whitefish cisco lake trout isotopes Chemical technology TP1-1185
Acceso en línea:	https://doaj.org/article/4983df0bd5f3423eb16f26812e0374fa
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spelling	oai:doaj.org-article:4983df0bd5f3423eb16f26812e0374fa2021-11-25T17:33:32ZCorrelation of Mercury Occurrence with Age, Elemental Composition, and Life History in Sea-Run Food Fish from the Canadian Arctic Archipelago’s Lower Northwest Passage10.3390/foods101126212304-8158https://doaj.org/article/4983df0bd5f3423eb16f26812e0374fa2021-10-01T00:00:00Zhttps://www.mdpi.com/2304-8158/10/11/2621https://doaj.org/toc/2304-8158As 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 (<i>n</i> = 537) comprising Arctic char (<i>Salvelinus alpinus</i>), lake trout (<i>S. namaycush</i>), lake whitefish (<i>Coregonus clupeaformis</i>), and cisco (<i>C. autumnalis, C. sardinella</i>) 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 (δ<sup>15</sup>N) and carbon (δ<sup>13</sup>C), 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<sup>−1</sup> wet weight (ww), below the levels described in several jurisdictions for subsistence fisheries (0.2 µg·g<sup>−1</sup> ww), 70% of lake trout were above this guideline (0.35 µg·g<sup>−1</sup> 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.Iris KochPranab DasBronte E. McPhedranJohn M. CasselmanKristy L. MonizPeter van Coeverden de GrootJames QitsualikDerek MuirStephan SchottVirginia K. WalkerMDPI AGarticleanadromous salmonidsArctic charlake whitefishciscolake troutisotopesChemical technologyTP1-1185ENFoods, Vol 10, Iss 2621, p 2621 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	anadromous salmonids Arctic char lake whitefish cisco lake trout isotopes Chemical technology TP1-1185
spellingShingle	anadromous salmonids Arctic char lake whitefish cisco lake trout isotopes Chemical technology TP1-1185 Iris Koch Pranab Das Bronte E. McPhedran John M. Casselman Kristy L. Moniz Peter van Coeverden de Groot James Qitsualik Derek Muir Stephan Schott Virginia K. Walker 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
description	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 (<i>n</i> = 537) comprising Arctic char (<i>Salvelinus alpinus</i>), lake trout (<i>S. namaycush</i>), lake whitefish (<i>Coregonus clupeaformis</i>), and cisco (<i>C. autumnalis, C. sardinella</i>) 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 (δ<sup>15</sup>N) and carbon (δ<sup>13</sup>C), 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<sup>−1</sup> wet weight (ww), below the levels described in several jurisdictions for subsistence fisheries (0.2 µg·g<sup>−1</sup> ww), 70% of lake trout were above this guideline (0.35 µg·g<sup>−1</sup> 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.
format	article
author	Iris Koch Pranab Das Bronte E. McPhedran John M. Casselman Kristy L. Moniz Peter van Coeverden de Groot James Qitsualik Derek Muir Stephan Schott Virginia K. Walker
author_facet	Iris Koch Pranab Das Bronte E. McPhedran John M. Casselman Kristy L. Moniz Peter van Coeverden de Groot James Qitsualik Derek Muir Stephan Schott Virginia K. Walker
author_sort	Iris Koch
title	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
title_short	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
title_full	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
title_fullStr	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
title_full_unstemmed	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
title_sort	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
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/4983df0bd5f3423eb16f26812e0374fa
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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

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