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首页> 外文期刊>Environmental Science & Technology >Mercury Concentrations in Arctic Food Fishes Reflect the Presence of Anadromous Arctic Charr (Salvelinus alpinus), Species, and Life History
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Mercury Concentrations in Arctic Food Fishes Reflect the Presence of Anadromous Arctic Charr (Salvelinus alpinus), Species, and Life History

机译：北极食用鱼类中的汞含量反映了异常北极Charr（Salvelinus alpinus），物种和生活史的存在

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摘要

Single-spawning (semelparous) anadromous fishes are known to transport contaminants from marine to freshwater habitats, but little research has been conducted on contaminant biotransport by multiple-spawning (iteroparous) anadromous fishes. We examined the effect of iteroparous, anadromous Arctic charr (Salvelinus alpinus) on mercury concentrations ([Hg]) in freshwater biota and compared [Hg] between species and life history types of Arctic charr and lake trout (Salvelinus namaycush). Data from six lakes and one coastal marine area in the Arctic territory of Nunavut, Canada, indicated that 1) lake trout had significantly lower [Hg] in lakes where anadromous Arctic charr were present; 2) [Hg] was significantly lower in recently discovered anadromous lake trout than in resident lake trout; and 3) regardless of life history, Arctic charr had significantly lower [Hg] than lake trout These differences were explained by fish condition, age-at-size, and C:N. Biomagnification of Hg, measured as log_(10)[Hg]-δ~(15)N slopes, did not differ between lakes with and without anadromous Arctic charr but was significantly higher in freshwater food webs (～0.2) than in the marine food web (0.08). Some biomagnification estimates were affected by correction for fish age and size. In contrast to semelparous anadromous species, biotransport of Hg by anadromous Arctic charr appears to be offset by increased growth of freshwater fishes.
机译：已知单产（异卵）无鳍鱼类将污染物从海洋转移到淡水生境，但关于多产（无卵）无鳍鱼类对污染物生物转运的研究很少。我们研究了异质，逆流的北极鲑（Salvelinus alpinus）对淡水生物群中汞浓度（[Hg]）的影响，并比较了北极鲑和鳟鱼（Salvelinus namaycush）的物种和生活史类型[Hg]。来自加拿大努纳武特地区北极地区的六个湖泊和一个沿海海域的数据表明：1）在存在北极北极红藻的湖泊中，鳟鱼的汞[Hg]明显降低； 2）在最近发现的水生鳟鱼中，[Hg]明显低于常驻鳟鱼。和3）不论生活史如何，北极鲑鱼的[Hg]均明显低于湖鳟鱼。这些差异可以通过鱼类状况，成年年龄和C：N来解释。汞的生物放大倍数，以log_（10）[Hg]-δ〜（15）N斜率衡量，在有和没有北极char鱼的湖泊之间没有差异，但是在淡水食物网中（〜0.2）明显高于海洋食物网页（0.08）。一些生物放大倍数的估计值受到鱼类年龄和大小的校正的影响。与呈片状的无性鱼类相反，由无性的北极鲑鱼进行的汞的生物转运似乎被淡水鱼类的生长增加所抵消。

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  • 来源
    《Environmental Science & Technology》 |2010年第9期|P.3286-3292|共7页
  • 作者

    HEIDI K. SWANSON; rnKAREN A. KIDD;

  • 作者单位

    Canadian Rivers Institute, University of New Brunswick, 100 Tucker Park Road, Saint John, New Brunswick E2L 4L5, Canada;

    rnCanadian Rivers Institute, University of New Brunswick, 100 Tucker Park Road, Saint John, New Brunswick E2L 4L5, Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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