Expósito-Granados Mónica, De La Cruz Carlos, Parejo Deseada, Valencia Juliana, Alarcos Susana, Avilés Jesús M
Departamento de Ecología Funcional y Evolutiva, Estación Experimental de Zonas Áridas (EEZA-CSIC), E-04120 La Cañada de San Urbano, Almería, Spain.
Departamento de Biología Animal, Facultad de Ciencias, Universidad de Extremadura, E-06071 Badajoz, Spain.
Behav Processes. 2016 Oct;131:9-14. doi: 10.1016/j.beproc.2016.07.013. Epub 2016 Jul 25.
Individuals within animal groups may differ in personality and degree of familiarity raising the question of how this influences their social interactions. In Iberian magpies Cyanopica cooki, a portion of first-year males engage in cooperative behaviours and dispersal, allowing addressing this question. In this study, we first investigate the relationship between colony familiarity (native versus foreign) and reproductive status (breeding versus helping) of males during 21 years. Secondly, we measure the exploratory behaviour and monitor reproductive status of a sample of individuals with different colony familiarity during 2 years. Long-term monitoring revealed that foreign individuals were more likely breeders. The analysis on the subset of individuals in which exploratory behaviour was measured revealed a mediatory effect of exploratory behaviour in the association between colony familiarity and helping behaviour. Specifically, among foreign individuals, higher explorative males were more frequently involved in helping behaviour than lower explorative ones. Conversely, among native males, breeders were more explorative than helpers. Our results suggest that aspects of personality may mediate the value of familiarity in reproductive tasks in social species.
动物群体中的个体在个性和熟悉程度上可能存在差异，这就引发了一个问题：这是如何影响它们的社会互动的。在伊比利亚喜鹊（Cyanopica cooki）中，一部分一岁雄性会参与合作行为和扩散，这使得我们能够探讨这个问题。在这项研究中，我们首先调查了21年间雄性的群体熟悉程度（本地与外来）与繁殖状态（繁殖与协助）之间的关系。其次，我们在两年内测量了不同群体熟悉程度的个体样本的探索行为并监测其繁殖状态。长期监测表明，外来个体更有可能成为繁殖者。对测量了探索行为的个体子集的分析显示，探索行为在群体熟悉程度与协助行为之间的关联中起到了中介作用。具体而言，在外来个体中，探索性较高的雄性比探索性较低的雄性更频繁地参与协助行为。相反，在本地雄性中，繁殖者比协助者更具探索性。我们的结果表明，个性方面可能会在社会物种的繁殖任务中调节熟悉程度的价值。
