Self-organized aggregation in cockroaches
Self-organized aggregation in cockroaches
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DOI：
10.1016/j.anbehav.2004.02.009
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发表时间：
2005-01-01
期刊：
影响因子：
2.5
通讯作者：
Theraulaz, G
中科院分区：
文献类型：
--
作者：
Jeanson, R;Rivault, C;Theraulaz, G
聚集现象在无脊椎动物社会中广泛存在，可能是对环境异质性的反应，也可能是个体之间的吸引。以德国小蠊幼虫为实验对象，在均匀环境下研究个体间相互作用对其聚集的影响。测试了不同的密度。第一个阶段导致幼虫径向分散，这与壁面跟随行为有关；这一过程的结果是幼虫在竞技场周围均匀分布。第二阶段对应于幼虫的角度重组导致聚集体的形成。这一现象从个人和集体两个层面进行了分析。个体蟑螂根据附近其他幼虫的存在来调节它们的行为：当幼虫数量更多时，停止和休息的概率都更高。然后，我们开发了一个基于代理的模型，实现了个人行为规则，所有这些都来自实验，以解释集体层面的聚集动力学。这项研究支持了这样的证据，即聚合依赖于放大机制，由个体之间的互动支持，这些互动遵循基于局部信息的简单规则，而不了解全球结构。(C) 2004动物行为研究协会。Elsevier Ltd.出版。版权所有。
Aggregation is widespread in invertebrate societies and can appear in response to environmental heterogeneities or by attraction between individuals. The performed experiments with cockroach, Blattella germanica, larvae in a homogeneous environment to investigate the influence of interactions between individuals on aggregations. Different densities were tested. A first phase led to radial dispersion of larvae in relation to wall-following behaviours; the consequence of this process was a homogeneous distribution of larvae around the periphery of the arena. A second phase corresponded to angular reorganization of larvae leading to the formation of aggregates. The phenomenon was analysed both at the individual and collective levels. Individual cockroaches modulated their behaviour depending on the presence of other larvae in their vicinity: probabilities of stopping and resting times were both higher when the numbers of larvae were greater. We then developed an agent-based model implementing individual behavioural rules, all derived from experiments, to explain the aggregation dynamics at the collective level. This study supports evidence that aggregation relies on mechanisms of amplification, supported by interactions between individuals that follow simple rules based on local information and without knowledge of the global structure. (C) 2004 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. An rights reserved.