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首页> 外文期刊>Ethology >The Influence of Personality on a Group-Level Process: Shy Hermit Crabs Make Longer Vacancy Chains
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The Influence of Personality on a Group-Level Process: Shy Hermit Crabs Make Longer Vacancy Chains

机译：人格对小组活动的影响：害羞的寄居蟹使空缺链更长

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摘要

Animal personality has been investigated in a variety of contexts but few studies have investigated the effects of individual-level traits on processes that occur at the group or population level. Vacancy chains describe sequences of linked vacancy moves in systems where individuals use discrete and reuseable resource units. When a new resource unit becomes available, this can cause a cascade of moves between resource units, beyond the first individual that encounters the new unit. Thus, vacancy chains can drive the distribution of resources through a population. Here, I investigate the effect of variation in boldness on movements between vacant gastropod shells in the hermit crab Pagurus bernhardus. Boldness was quantified using the duration of a startle response, which varied consistently between individuals. In groups of five crabs, introduction of a single new shell led to aggregate benefits, in terms of improving shell quality, across all group members. Boldness did not influence the extent of these benefits or the extent to which they were distributed between crabs of different sizes. Initially, vacancy chains were longer, indicating that more individuals moved between shells, for bold groups compared with shy groups. After 24h, however, the chain length was longer for shy groups. Thus, although participation in a vacancy chain may lead to similar benefits, these could be more widespread for groups comprising shy individuals that show long startle responses, low inquisitiveness and low aggression. Similar effects on resource acquisition could be present in other examples of animals that utilise reusable resource units and show consistent between-individual differences in behaviour.
机译：在各种情况下都对动物的人格进行了研究，但很少有研究研究个体水平性状对群体或种群水平上发生的过程的影响。空缺链描述了个人使用离散且可重复使用的资源单元的系统中链接的空缺移动的顺序。当一个新的资源单元变得可用时，这可能导致资源单元之间的级联移动，超出遇到该新单元的第一个个体。因此，空缺链可以推动整个人口的资源分配。在这里，我调查了寄居蟹Pagurus bernhardus中空腹腹足纲贝壳之间的运动对胆量变化的影响。使用惊吓反应的持续时间对大胆程度进行量化，个体之间的反应持续变化。在五个螃蟹的小组中，引入单个新的壳会为所有小组成员带来总体利益，就改善壳质量而言。粗体不影响这些益处的程度或它们在不同大小的螃蟹之间分配的程度。最初，空缺链较长，这表明胆大的组比害羞的组有更多的人在壳之间移动。但是，在24小时之后，害羞组的链长更长。因此，尽管参与一个空缺链可以带来类似的好处，但对于那些由羞怯的个体组成的群体，这些群体表现出长期的惊吓反应，低好奇心和低侵略性，这些好处可能会更加普遍。在其他利用可重复使用的资源单位并表现出一致的个体差异的动物中，对资源获取的影响也可能相似。

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  • 来源
    《Ethology》 |2013年第11期|共10页
  • 作者

    Briffa Mark;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 动物学;
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