Response of insect swarms to dynamic illumination perturbations
Response of insect swarms to dynamic illumination perturbations
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DOI：
10.1098/rsif.2018.0739
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发表时间：
2019-01-01
影响因子：
3.9
通讯作者：
Ouellette, Nicholas T.
中科院分区：
文献类型：
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作者：
Sinhuber, Michael;van der Vaart, Kasper;Ouellette, Nicholas T.
许多跨分类群的动物物种自发地形成群体，表现出集体行为。在野外，这些集体系统不可避免地受到无处不在的环境扰动的影响，如阵风、声音和视觉刺激，或捕食者或其他动物的存在。然而，人们对这些环境扰动影响动物集体行为的方式知之甚少，部分原因是在自然环境中进行受控的定量扰动实验是具有挑战性的。为了避免控制野外环境条件的需要，我们在实验室实验中研究成群的蠓，我们可以完全控制外部扰动。在这里，我们考虑控制可变光照对蜂群行为的影响。我们发现，不仅群体中的个体在明亮的条件下通过加速来响应光的变化，而且群体作为一个整体通过压缩和同时增加个体对其质量中心的吸引力来响应这些扰动。群体水平的响应可以通过类比经典热力学来描述，群体的状态沿着热力学相平面的等温线移动。
Many animal species across taxa spontaneously form aggregations that exhibit collective behaviour. In the wild, these collective systems are unavoidably influenced by ubiquitous environmental perturbations such as wind gusts, acoustic and visual stimuli, or the presence of predators or other animals. The way these environmental perturbations influence the animals' collective behaviour, however, is poorly understood, in part because conducting controlled quantitative perturbation experiments in natural settings is challenging. To circumvent the need for controlling environmental conditions in the field, we study swarming midges in a laboratory experiment where we have full control over external perturbations. Here, we consider the effect of controlled variable light exposure on the swarming behaviour. We find that not only do individuals in the swarm respond to light changes by speeding up during brighter conditions but also the swarm as a whole responds to these perturbations by compressing and simultaneously increasing the attraction of individual midges to its centre of mass. The swarm-level response can be described by making an analogy to classical thermodynamics, with the state of the swarm moving along an isotherm in a thermodynamic phase plane.