Information transfer and behavioural inertia in starling flocks.
Information transfer and behavioural inertia in starling flocks.
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DOI：
10.1038/nphys3035
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发表时间：
2014-09-01
期刊：
影响因子：
19.6
通讯作者：
中科院分区：
文献类型：
--
作者：
生物系统中的集体决策需要群体中的所有个体经历行为状态的改变。在这一转变过程中，快速和稳健的信息传递对于防止内聚丧失至关重要。然而，自然群体获得如此健壮性的机制尚不清楚。在这里，我们提出了一个实验研究欧椋鸟群表演集体转身。我们发现关于方向变化的信息以线性色散规律和可忽略的衰减在群体中传播，从而最小化群体退相干。这些结果与目前预测信息扩散传输的集体运动模型形成鲜明对比。在自发对称破缺和守恒定律的基础上，我们提出了一个正确再现线性无阻尼传播的新理论。新框架的关键是纳入鸟类的行为惯性。新理论不仅解释了数据，而且预测了群体的取向秩序越强，信息传递速度就越快，这一预测得到了数据的准确验证。我们的研究结果表明，快速决策可能是在许多生活群体中观察到的强烈行为两极分化的适应性驱动。
Collective decision-making in biological systems requires all individuals in the group to go through a behavioural change of state. During this transition fast and robust transfer of information is essential to prevent cohesion loss. The mechanism by which natural groups achieve such robustness, though, is not clear. Here we present an experimental study of starling flocks performing collective turns. We find that information about direction changes propagates across the flock with a linear dispersion law and negligible attenuation, hence minimizing group decoherence. These results contrast starkly with current models of collective motion, which predict diffusive transport of information. Building on spontaneous symmetry breaking and conservation laws arguments, we formulate a new theory that correctly reproduces linear and undamped propagation. Essential to the new framework is the inclusion of the birds’ behavioural inertia. The new theory not only explains the data, but also predicts that information transfer must be faster the stronger the group’s orientational order, a prediction accurately verified by the data. Our results suggest that swift decision-making may be the adaptive drive for the strong behavioural polarization observed in many living groups.
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影响因子：
2.5
作者：
Ballerini, Michele;Cabibbo, Nicola;Zdravkovic, Vladimir
通讯作者：
Zdravkovic, Vladimir
影响因子：
--
作者：
MATSUBARA, T;MATSUDA, H
通讯作者：
MATSUDA, H
影响因子：
--
作者：
HALPERIN, BI;HOHENBER.PC
通讯作者：
HOHENBER.PC
影响因子：
1.9
作者：
Conner, GR;Grant, CP
通讯作者：
Grant, CP
DOI：
10.1073/pnas.0711437105
发表时间：
2008-01-29
影响因子：
11.1
作者：
Ballerini, M.;Calbibbo, N.;Zdravkovic, V.
通讯作者：
Zdravkovic, V.