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首页> 外文期刊>Environmental Science & Technology >Reduced Trace Element Concentrations in Fast-Growing Juvenile Atlantic Salmon in Natural Streams
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Reduced Trace Element Concentrations in Fast-Growing Juvenile Atlantic Salmon in Natural Streams

机译：减少天然溪流中快速生长的大西洋少年鲑鱼中的痕量元素浓度

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摘要

To assess the effect of rapid individual growth on trace element concentrations in fish, we measured concentrations of seven trace elements (As, Cd, Cs, Hg, Pb, Se, Zn) in stream-dwelling Atlantic salmon (Salmo salar) from 15 sites encompassing a 10-fold range in salmon growth. All salmon were hatched under uniform conditions, released into streams, and sampled ～120 days later for trace element analysis. For most elements, element concentrations in salmon tracked those in their prey. Fast-growing salmon had lower concentrations of all elements than slow growers, after accounting for prey concentrations. This pattern held for essential and nonessential elements, as well as elements that accumulate from food and those that can accumulate from water. At the sites with the fastest salmon growth, trace element concentrations in salmon were 37% (Cs) to 86% (Pb) lower than at sites where growth was suppressed. Given that concentrations were generally below levels harmful to salmon and that the pattern was consistent across all elements, we suggest that dilution of elements in larger biomass led to lower concentrations in fast-growing fish. Streams that foster rapid, efficient fish growth may produce fish with lower concentrations of elements potentially toxic for human and wildlife consumers.
机译：为了评估个体快速生长对鱼类中微量元素浓度的影响，我们从15个地点测量了居住在河流中的大西洋鲑鱼（Salmo salar）中7种微量元素（As，Cd，Cs，Hg，Pb，Se，Zn）的浓度包括鲑鱼生长的10倍范围。所有鲑鱼均在统一条件下孵化，释放到溪流中，约120天后取样进行微量元素分析。对于大多数元素，鲑鱼中的元素浓度跟踪其猎物中的元素浓度。考虑到猎物的浓度后，快速生长的鲑鱼的所有元素浓度都比缓慢生长的鲑鱼低。这种模式适用于基本要素和非必需要素，以及从食物中累积的元素和可以从水中累积的元素。在鲑鱼生长最快的地点，鲑鱼中的微量元素浓度比生长受到抑制的地点低37％（Cs）至86％（Pb）。鉴于浓度通常低于对鲑鱼有害的水平，并且所有元素的模式均保持一致，因此我们建议在较大生物量中稀释元素会导致速生鱼的浓度降低。促进鱼类快速有效生长的溪流可能生产出浓度较低的鱼类，对人类和野生动植物消费者具有潜在的毒性。

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  • 来源
    《Environmental Science & Technology》 |2010年第9期|P.3245-3251|共7页
  • 作者

    DARREN M. WARD; rnKEITH H. NISLOW; rnCELIA Y. CHEN; rnCAROL L. FOLT;

  • 作者单位

    Department of Biological Sciences, Dartmouth College, Hanover, New Hampshire 03755;

    rnNorthern Research Station, USDA-USFS, University of Massachusetts, Amherst, Massachusetts 01003;

    rnDepartment of Biological Sciences, Dartmouth College, Hanover, New Hampshire 03755;

    rnDepartment of Biological Sciences, Dartmouth College, Hanover, New Hampshire 03755;

  • 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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  • 正文语种 eng
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