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首页> 外文期刊>Chemosphere >Limited effects of changing prey fish communities on food quality for aquatic predators in the eastern Canadian Arctic in terms of essential fatty acids, methylmercury and selenium
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Limited effects of changing prey fish communities on food quality for aquatic predators in the eastern Canadian Arctic in terms of essential fatty acids, methylmercury and selenium

机译：就必需脂肪酸，甲基汞和硒而言，改变捕食鱼类群落对加拿大东部北极水域捕食者食品质量的影响有限

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摘要

DWe determined concentrations of eicosapentaenoic and docosahexaenoic acids (EPA + DHA), Sigma omega-3, polyunsaturated fatty acids (Sigma PUFA), selenium, methylmercury, and selenium:methylmercury (Se:Hg) ratios in native and northward-redistributing sub-Arctic marine fish and invertebrates from low, mid-, and high Canadian Arctic latitudes. There was no clear latitudinal trend in nutrient or contaminant concentrations. Among species, EPA + DHA concentrations in native Arctic cod (Boreogadus saida) were similar to concentrations in sub-Arctic capelin (Mallotus villosus) and sand lance (Ammodytes spp.) (444-658 mg.100 g(-1)), and higher than in most other species. Concentrations of EPA + DHA were related to lipid content, but to a greater extent for higher trophic position species (R-2 = 0.83) than for species at lower trophic positions (R-2 = 0.61). Selenium concentrations were higher in sand lance (1.15 +/- 0.16 mu g g(-1)) than in all other species (0.30-0.69 mu g g(-1)), which was significantly, but weakly, explained by more pelagic feeding in sand lance. Methylmercury concentrations were similar (and Se:Hg ratios were higher) in capelin, sand lance, and Arctic cod (0.01-0.03 mu g g(-1) wet weight (ww)) and lower than in other prey (0.12-0.26 mu g g(-1) ww), which was significantly explained by the smaller size of these species and more pelagic feeding habits than other fish. These results suggested that a shift in prey fish composition from Arctic cod to capelin and/or sand lance is unlikely to reduce the food quality of the prey available to marine predators at least with respect to concentrations of essential fatty acids, selenium, and Se:Hg ratios. (C) 2018 Elsevier Ltd. All rights reserved.
机译：DWe确定了天然和向北分布的亚北极地区的二十碳五烯酸和二十二碳六烯酸（EPA + DHA），Sigma omega-3，多不饱和脂肪酸（Sigma PUFA），硒，甲基汞和硒：甲基汞（Se：Hg）的浓度来自加拿大北极低，中和高纬度的海鱼和无脊椎动物。营养素或污染物浓度没有明显的纬度趋势。在物种中，原生北极鳕鱼（Boreogadus saida）中的EPA + DHA浓度与亚北极毛鳞鱼（Mallotus villosus）和长矛（Ammodytes spp。）（444-658 mg.100 g（-1））中的浓度相似，并高于大多数其他物种。 EPA + DHA的浓度与脂质含量有关，但营养位置较高的物种（R-2 = 0.83）比营养位置较低的物种（R-2 = 0.61）更大。喷枪中的硒浓度（1.15 +/- 0.16 mu gg（-1））高于所有其他物种中的硒浓度（0.30-0.69 mu gg（-1）），这显着但较弱，这是因为沙矛。在毛鳞鱼，沙矛和北极鳕鱼中，甲基汞浓度相似（且硒：汞比更高）（湿重（ww）为0.01-0.03 mu gg（-1）），低于其他猎物（0.12-0.26 mu gg） （-1）ww），这可以用比其他鱼类小的规格和更多的中上层捕食习惯来解释。这些结果表明，至少在必需脂肪酸，硒和硒的浓度方面，从北极鳕鱼到毛鳞鱼和/或沙矛鱼的捕食鱼类成分变化不太可能降低海洋捕食者可获得的猎物的食物质量：汞比。 （C）2018 Elsevier Ltd.保留所有权利。

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  • 来源
    《Chemosphere》 |2019年第1期|855-865|共11页
  • 作者

    Pedro Sara; Fisk Aaron T.; Ferguson Steven H.; Hussey Nigel E.; Kessel Steven T.; McKinney Melissa A.;

  • 作者单位

    Univ Windsor, Dept Biol Sci, Windsor, ON N9B 3P4, Canada;

    Univ Connecticut, Wildlife & Fisheries Conservat Ctr, Dept Nat Resources & Environm, Storrs, CT 06269 USA;

    John G Shedd Aquarium, Daniel P Haerther Ctr Conservat & Res, Chicago, IL 60605 USA;

    Univ Connecticut, Ctr Environm Sci & Engn, Storrs, CT 06269 USA;

    Univ Windsor, Great Lakes Inst Environm Res, Windsor, ON N9B 3P4, Canada;

    McGill Univ, Dept Nat Resource Sci, Ste Anne De Bellevue H9X 3V9, PQ, Canada;

    Fisheries & Oceans Canada, Cent & Arctic Reg, Winnipeg, MB R3T 2N6, Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Species redistribution; Fatty acids; Nutritional value; Prey fish; Se:Hg ratios; Species differences;

    机译：物种再分配;脂肪酸;营养价值;Pre鱼;硒：汞比;物种差异;

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