Wild zebra finches that nest synchronously have long-term stable social ties
Wild zebra finches that nest synchronously have long-term stable social ties
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DOI：
10.1111/1365-2656.13082
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发表时间：
2019-09-18
影响因子：
4.8
通讯作者：
Schuett, Wiebke
中科院分区：
文献类型：
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作者：
Brandl, Hanja B.;Griffith, Simon C.;Schuett, Wiebke
许多动物在群体中生活和繁殖，然而，除了少数例外，群体成员之间的社会纽带的价值很少被研究。社会联系对于群体协调在集体任务中是重要的，社会协调可以促进群体成员之间的同步繁殖。同步繁殖反过来又可以放大殖民的好处，比如社会觅食和躲避捕食者。我们进行了一项实地研究，以调查是否在复制殖民地的个人之间的同步繁殖与他们的社会债券的强度，以及这些强大的债券是否保持超过生殖期。我们对野生斑胸草雀（Taeniopygia guttata）进行了PIT标记，连续两年监测它们的繁殖和社会觅食。然后，我们使用社会网络分析来描述种群中鸟类之间社会联系的强度。我们发现，在繁殖时间上更同步的鸟类（并在同一个群体中繁殖）在繁殖期间和繁殖后的社会联系比预期的要强得多。我们的长期抽样还显示，同步繁殖者之间的强大社会联系是跨年进行的。我们的研究揭示了同步繁殖和繁殖群体的社会结构之间的强烈对应关系。这表明，两人之间的同步不是一个基于机会的简单过程，而是一种由更复杂的社会性支撑的机制，这种机制可以扩展到其他行为环境。跨背景的社会关系，跨年的维护表明，社会结构可能会有广泛的影响，个人的整体生活史，除了发挥关键作用的繁殖动力的殖民育种。
Many animals live and breed in colonies, and yet, with just a few exceptions, the value of the social bonds between colony members has rarely been examined. Social ties are important for group coordination at collective tasks, and social coordination can facilitate synchronized reproduction among colony members. Synchronized reproduction in turn can amplify the benefits of coloniality, such as social foraging and predator avoidance. We conducted a field study to investigate whether synchronized reproduction among individuals in replicated colonies is linked to the strength of their social bond, and whether these strong bonds are maintained beyond the reproductive period. We PIT-tagged wild zebra finches (Taeniopygia guttata), monitoring their reproduction and social foraging over two consecutive years. We then used social network analysis to characterize the strength of social bonds among birds in the population. We show that birds that are more synchronized in their reproductive timing (and breed in the same colony) had significantly stronger social ties both during and after reproduction than expected by chance. Our long-term sampling also revealed that the strong social ties between synchronized breeders were carried over across years. Our study reveals a strong correspondence between synchronized breeding and the social structure of the breeding colony. This suggests that the synchrony between pairs is not a simple process based on opportunity, but a mechanism underpinned by more complex sociality, which could be carried over to other behavioural contexts. The maintenance of cross-contextual social ties across years suggests that social structure could have extensive consequences on the overall life history of individuals in addition to playing a key role for the reproductive dynamics of colonial breeders.