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首页> 外文期刊>Conservation Biology >Use of Fatty Acid Analysis to Determine Dispersal of Caspian Terns in the Columbia River Basin, U.S.A.
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Use of Fatty Acid Analysis to Determine Dispersal of Caspian Terns in the Columbia River Basin, U.S.A.

机译：使用脂肪酸分析确定美国哥伦比亚河盆地里海燕鸥的分布

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摘要

Abstract: Lethal control, which has been used to reduce local abundances of animals in conflict with humans or with endangered species, may not achieve management goals if animal movement is not considered. In populations with emigration and immigration, lethal control may induce compensatory immigration, if the source of attraction remains unchanged. Within the Columbia River Basin (Washington, U.S.A.), avian predators forage at dams because dams tend to reduce rates of emigration of juvenile salmonids (Oncorhynchus spp.), artificially concentrating these prey. We used differences in fatty acid profiles between Caspian Terns (Hydroprogne caspia) at coastal and inland breeding colonies and terns culled by a lethal control program at a mid-Columbia River dam to infer dispersal patterns. We modeled the rate of loss of fatty acid biomarkers, which are fatty acids that can be traced to a single prey species or groups of species, to infer whether and when terns foraging at dams had emigrated from the coast. Nonmetric multidimensional scaling showed that coastal terns had high levels of C20 and C22 monounsaturated fatty acids, whereas fatty acids of inland breeders were high in C18:3n3, C20:4n6, and C22:5n3. Models of the rate of loss of fatty acid showed that approximately 60% of the terns collected at Rock Island Dam were unlikely to have bred successfully at local (inland) sites, suggesting that terns foraging at dams come from an extensive area. Fatty acid biomarkers may provide accurate information about patterns of dispersal in animal populations and may be extremely valuable in cases where populations differ demonstrably in prey base.
机译：摘要：致命控制已被用于减少与人类或濒临灭绝物种冲突的动物的局部丰富度，如果不考虑动物运动，可能无法实现管理目标。在有移民和移民的人口中，如果吸引力的来源保持不变，则致命的控制可能会导致代偿性移民。在哥伦比亚河流域（美国华盛顿）内，鸟类捕食者在水坝上觅食，因为水坝往往会降低少年鲑鱼（Oncorhynchus spp。）的移居率，从而人为地集中了这些猎物。我们利用哥伦布河中部大坝通过致命控制程序剔除的沿海和内陆繁殖群体和燕鸥之间的里海燕鸥（Hydroprogne caspia）之间的脂肪酸谱差异，以推断出传播方式。我们对脂肪酸生物标志物的损失速率进行了建模，该标志物可以追溯到单个猎物物种或物种组，从而推断出在大坝觅食的燕鸥是否以及何时从海岸迁徙。非度量多维标度表明，沿海燕鸥的C 20 和C 22 单不饱和脂肪酸含量较高，而内陆种鸡的脂肪酸含量较高，分别为C18：3n3，C20：4n6 ，以及C22：5n3。脂肪酸损失率的模型显示，在洛克岛大坝收集的燕鸥中，约有60％不太可能在本地（内陆）地点成功繁殖，这表明在大坝觅食的燕鸥来自广阔的地区。脂肪酸生物标记物可以提供有关动物种群中传播模式的准确信息，并且在种群的食饵基础明显不同的情况下可能非常有价值。

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  • 来源
    《Conservation Biology》 |2011年第4期|p.736-746|共11页
  • 作者

    CHRISTINA J. MARANTO; JULIA K. PARRISH; DAVID P. HERMAN; ANDRÉ E. PUNT; JULIAN D. OLDEN; MICHAEL T. BRETT; DANIEL D. ROBY;

  • 作者单位

    University of Washington, Department of Biology, Seattle, WA 98195, U.S.A.;

    University of Washington, Department of Biology, Seattle, WA 98195, U.S.A.|University of Washington, School of Aquatic and Fishery Sciences, Seattle, WA 98195, U.S.A.;

    Environmental Conservation, NOAA Fisheries/National Marine Fisheries Service, Northwest Fisheries Science Center, 2725 Montlake Boulevard, East, Seattle, WA 98112, U.S.A.;

    University of Washington, School of Aquatic and Fishery Sciences, Seattle, WA 98195, U.S.A.;

    University of Washington, School of Aquatic and Fishery Sciences, Seattle, WA 98195, U.S.A.;

    University of Washington, Department of Civil and Environmental Engineering, Seattle, WA 98195, U.S.A.;

    U.S. Geological Survey—Oregon Cooperative Fish and Wildlife Research Unit, Department of Fisheries and Wildlife, Oregon State University, 104 Nash Hall, Corvallis, OR 97331, U.S.A.;

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  • 正文语种 eng
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  • 关键词

    Avian predator; dispersal; fatty acid; Hydroprogne caspia; salmonácido graso; ave depredadora; dispersión; Hydroprogne caspia; salmón;

    机译：禽掠食者;分散性;脂肪酸;氢化立克次体;脂肪鲑鱼;掠食性鸟类;分散;氢化立克次体;鲑鱼;

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