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首页> 外文期刊>Marine ecology >Linking foraging behavior and diet in a diving seabird
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Linking foraging behavior and diet in a diving seabird

机译：将潜水海鸟的觅食行为与饮食联系起来

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摘要

Foraging behavior and diet of breeding seabirds may be analysed simultaneously with the combined use of remote sensing devices and stable isotope analysis. Imperial shag, Phalacrocorax atriceps, breeding at Punta León colony, Argentina, were equipped with global positioning system (GPS) loggers to record foraging trips and blood samples were taken after removal of the devices in order to analyse their nitrogen and carbon stable isotope composition in whole blood and plasma. Whole blood was correlated to plasma isotopic composition for each individual (n=35), linking diet in the short and medium term. Sexes did not differ in isotopic signatures. The maximum distance reached and the total number of dives that individuals made on two consecutive foraging trips were correlated to their plasma nitrogen isotopic signature. Individuals that went further from the colony and dived fewer times presented more positive signatures, indicative of benthic prey consumption (e.g. Raneya brasiliensis). Diet was predominantly benthic with some individuals incorporating pelagic prey (Engraulis anchoita) and even cephalopods (Octopus tehuelchus). Within breeding pairs (n=9), different combinations of foraging and prey preferences were observed. Estimated trophic levels of these individuals were similar to those of the same species in other colonies further south along the Patagonian coast.
机译：结合使用遥感设备和稳定同位素分析，可以同时分析繁殖海鸟的觅食行为和饮食。在阿根廷蓬塔莱昂殖民地繁殖的帝王粗毛（Phalacrocorax atriceps）配备了全球定位系统（GPS）记录仪，以记录觅食行程，并在移除设备后采集血样，以分析其氮和碳稳定同位素组成。全血和血浆。全血与每个个体的血浆同位素组成相关（n = 35），在短期和中期都与饮食有关。性别在同位素特征上没有差异。连续两次觅食旅行所达到的最大距离和潜水总数与他们的血浆氮同位素特征相关。离殖民地较远且潜水次数较少的个体表现出更多的积极特征，表明底栖猎物正在被消耗（例如巴西芸苔）。饮食主要是底栖动物，有些个体掺入了上层捕食者（Engraulis anchoita）甚至头足类动物（章鱼（Octopus tehuelchus））。在繁殖对中（n = 9），观察到觅食和猎物偏好的不同组合。这些个体的营养水平估计与在巴塔哥尼亚海岸以南的其他殖民地的相同物种的营养水平相似。

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  • 来源
    《Marine ecology》 |2016年第2期|419-432|共14页
  • 作者

    Harris Sabrina; Quintana Flavio; Ciancio Javier; Riccialdelli Luciana; Raya Rey Andrea;

  • 作者单位

    CADIC Centro Austral de Investigaciones Científicas y Técnicas UshuaiaTierra del Fuego Argentina;

    CENPAT Centro Nacional Patagónico Puerto MadrynChubut Argentina;

    Wildlife Conservation Society Ciudad de Buenos Aires Buenos Aires Argentina;

    CENPAT Centro Nacional Patagónico Puerto MadrynChubut Argentina;

    CADIC Centro Austral de Investigaciones Científicas y Técnicas UshuaiaTierra del Fuego Argentina;

    CADIC Centro Austral de Investigaciones Científicas y Técnicas UshuaiaTierra del Fuego Argentina;

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  • 正文语种 eng
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  • 关键词

    Diet; foraging behavior; seabirds; stable isotopes;

    机译：饮食;觅食行为;海鸟;稳定同位素;

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