Behavioural trait assortment in a social network: patterns and implications
Behavioural trait assortment in a social network: patterns and implications
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DOI：
10.1007/s00265-009-0802-x
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发表时间：
2009-08-01
影响因子：
2.3
通讯作者：
James, Richard
中科院分区：
文献类型：
--
作者：
Croft, Darren P.;Krause, Jens;James, Richard
种群的社会精细结构在生态和进化过程中起着核心作用。虽然许多研究已经调查了形态特征（如大小）如何影响人口的社会结构，但对大胆和害羞等行为的影响知之甚少。利用特立尼达孔雀鱼（Poecilia reticulata）野生种群的社会互动信息，我们构建了一个社会网络。对于网络中的每个人，我们量化其行为表型使用两个措施的大胆，捕食者检查的倾向，一个可重复的和可靠的测量行为以及研究的背景下，合作，和浅滩的倾向。我们观察到显着的异质性的接触模式，与强关系被积极分类和弱关系负分类我们测量的行为特征。此外，害羞的鱼比大胆的鱼有更多的网络连接，这些连接平均起来更强大。换句话说，社会精细结构受到行为特征的强烈影响。我们断言，这样的结构将有影响的结果选择的行为特征，我们推测，所观察到的积极的分类可能会作为一个放大器的选择，有助于维护合作捕食者检查。
The social fine structure of a population plays a central role in ecological and evolutionary processes. Whilst many studies have investigated how morphological traits such as size affect social structure of populations, comparatively little is known about the influence of behaviours such as boldness and shyness. Using information on social interactions in a wild population of Trinidadian guppies (Poecilia reticulata), we construct a social network. For each individual in the network, we quantify its behavioural phenotype using two measures of boldness, predator inspection tendency, a repeatable and reliably measured behaviour well studied in the context of co-operation, and shoaling tendency. We observe striking heterogeneity in contact patterns, with strong ties being positively assorted and weak ties negatively assorted by our measured behavioural traits. Moreover, shy fish had more network connections than bold fish and these were on average stronger. In other words, social fine structure is strongly influenced by behavioural trait. We assert that such structure will have implications for the outcome of selection on behavioural traits and we speculate that the observed positive assortment may act as an amplifier of selection contributing to the maintenance of co-operation during predator inspection.