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首页> 外文期刊>Marine biology >Changes in the feeding behavior of the deposit-feeding polychaete Laeonereis acuta on soft sediments inhabited by burrowing crabs
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Changes in the feeding behavior of the deposit-feeding polychaete Laeonereis acuta on soft sediments inhabited by burrowing crabs

机译：穴居蟹栖息的软质沉积物上的沉积物摄食多壳黑La的摄食行为的变化

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摘要

In this paper, we evaluate the influence of the burrowing crab Chasmagnathus granulatus on the feeding behavior, body condition, burrowing activity, and fecal production of the deposit-feeding polychaete Laeonereis acuta. Previous results and ours show that, due to crab activity, sediment organic matter decreases with depth outside a crab bed, but there were no differences inside. Also, particle sizes were smaller inside the crab bed. Polychaetes showed better body condition inside the crab bed, suggesting higher energy gain. They fed on the surface more frequently outside the crab bed than inside. However, feeding rate was higher inside the crab bed, which is consistent with the larger weight and volume of fecal pellets found inside crab bed. In both areas, the bedload sediment transport was not similar to the sediment ingested by this polychaete. A 1-month exclusion/inclusion experiment performed outside and inside the crab bed showed that the body condition of poly-chaetes changed between areas but that this was not directly due to crab manipulation. Thus, our results suggest that the higher sediment quality inside a crab bed can positively affect the feeding behavior of the deposit-feeding polychaete L. acuta, increasing its feeding rate and consequently enhancing its body condition.
机译：在本文中，我们评估了穴居蟹Chasmagnathus granulatus对沉积物喂养的多毛etLaeonereis acuta的摄食行为，身体状况，穴居活动和粪便产生的影响。先前的结果和我们的研究结果表明，由于蟹的活动，蟹床外的沉积物有机质随深度的增加而减少，但内部没有差异。另外，蟹床内部的粒径较小。 cha在蟹床上显示出更好的身体状况，表明能量增加。他们在螃蟹床外面比在内部更频繁地在水面上觅食。然而，蟹床内部的进食速率较高，这与蟹床内部发现的较大重量和体积的粪便颗粒一致。在这两个地区，床荷沉积物的运输都与该多毛类动物摄入的沉积物不同。在蟹床内外进行的为期1个月的排除/包容实验表明，多毛cha的身体状况在区域之间发生了变化，但这不是直接由于蟹的操纵而引起的。因此，我们的结果表明，蟹床内较高的沉积物质量可以积极地影响以沉积物为食的多毛小金龟的摄食行为，提高其摄食率，从而改善其身体状况。

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  • 来源
    《Marine biology》 |2004年第4期|p.657-667|共11页
  • 作者

    G. Palomo; P. Martinetto; O. Iribarne;

  • 作者单位

    Centre for Research on Ecological Impacts of Coastal Cities, Marine Ecology Laboratories A11, University of Sydney, 2006 Sydney, NSW, Australia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境生物学;
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