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首页> 外文期刊>Marine biology >Estimating digestion time in gelatinous predators: a methodological comparison with the scyphomedusa Aurelia aurita
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Estimating digestion time in gelatinous predators: a methodological comparison with the scyphomedusa Aurelia aurita

机译：估计胶状捕食者的消化时间：与海豚（Syphomedmedusa Aurelia aurita）的方法学比较

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摘要

In order to quantify the trophic impact of gelatinous predators, digestion time estimates are commonly applied to counts of prey in the guts. Three primary approaches are used, the Manual-feeding, Natural-feeding and Steady-state methods; these differ in methodology and their underlying assumptions. The criteria used to define the end-point of digestion, and the resolution at which digestion progress is observed, also vary across studies. To understand the impact of such differences, we estimate digestion times of the scyphomedusa Aurelia aurita fed adult females of the copepod Acartia tonsa using these various approaches. We find ~ fourfold differences which can be attributed to bias towards the slowest rates of digestion by some end-point criteria, and overestimation from low observation resolution. Artificial manipulation and the degree to which swimming and feeding behaviour are natural may also influence estimates. We provide recommendations for those quantifying digestion times of Aurelia aurita medusae and gelatinous predators.
机译：为了量化胶状食肉动物的营养影响，通常将消化时间估算应用于内脏中的食肉计数。使用了三种主要方法，即手动进料，自然进料和稳态方法。这些在方法和基本假设上有所不同。在研究中，用于定义消化终点的标准以及观察到消化过程的分辨率也有所不同。为了理解这种差异的影响，我们使用这些方法估算了pe足纲pe螨的成年雌性饱腹水单胞菌的摄取。我们发现〜有四倍的差异，这可以归因于某些端点标准偏向最慢的消化速率，以及由于观察分辨率低而导致的高估。人工操作以及游泳和进食行为的自然程度也可能影响估计。我们提供了一些建议，用于量化金黄色葡萄球菌和胶状捕食者的消化时间。

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  • 来源
    《Marine biology》 |2013年第4期|793-804|共12页
  • 作者

    Tania FitzGeorge-Balfour; Andrew G. Hirst; Cathy H. Lucas; Jamie Craggs; Emma J. Whelan; Shorok Mombrikotb;

  • 作者单位

    School of Biological and Chemical Sciences, Queen Mary University of London, London E1 4NS, UK;

    School of Biological and Chemical Sciences, Queen Mary University of London, London E1 4NS, UK;

    National Oceanography Centre, School of Ocean and Earth Science, University of Southampton,Southampton SO 14 3ZH, UK;

    Horniman Museum and Aquarium, London SE23 3PQ, UK;

    National Oceanography Centre, School of Ocean and Earth Science, University of Southampton,Southampton SO 14 3ZH, UK;

    School of Biological and Chemical Sciences, Queen Mary University of London, London E1 4NS, UK;

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