首页    期刊浏览 2024年12月05日 星期四
登录注册

文章基本信息

  • 标题: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
  • 本地全文:下载
  • 作者:Iris Koch ; Pranab Das ; Bronte E. McPhedran
  • 期刊名称:Foods
  • 电子版ISSN:2304-8158
  • 出版年度:2021
  • 卷号:10
  • 期号:11
  • DOI:10.3390/foods10112621
  • 语种:English
  • 出版社:MDPI Publishing
  • 摘要: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 (δ 15N) and carbon (δ 13C), 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.
  • 关键词:anadromous salmonids; Arctic char; lake whitefish; cisco; lake trout; isotopes; otoliths
国家哲学社会科学文献中心版权所有