Wild zebra finches that nest synchronously have long‐term stable social ties,Journal of Animal Ecology

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Wild zebra finches that nest synchronously have long‐term stable social ties
Journal of Animal Ecology ( IF 3.5 ) Pub Date : 2019-09-18 , DOI: 10.1111/1365-2656.13082
Hanja B Brandl _{1,

2,

3,

4,

5,

6} , Simon C Griffith _{2,

3} , Damien R Farine _{4,

5,

6,

7} , Wiebke Schuett _{1,

3,

8}

Affiliation

Many animals live and breed in colonies and yet, with just a few exceptions, the value of the social bonds between colony members have 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 if 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 characterise 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 synchronised breeders were carried over across years. Our study reveals a strong correspondence between synchronised 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.

中文翻译：

同步筑巢的野生斑胸草雀具有长期稳定的社会关系

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。社会关系对于集体任务中的群体协调很重要，社会协调可以促进群体成员之间的同步繁殖。同步繁殖反过来可以放大殖民的好处，例如社会觅食和避免捕食者。我们进行了一项实地研究，以调查复制群体中个体之间的同步繁殖是否与其社会联系的强度有关，以及这些牢固的联系是否在繁殖期后仍能维持。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，我们使用社交网络分析来表征种群中鸟类之间社会联系的强度。我们表明，繁殖时间更同步（并在同一群落中繁殖）的鸟类在繁殖期间和繁殖后的社会联系都比偶然预期的要强得多。我们的长期抽样还表明，同步育种者之间的强大社会联系已经延续了多年。我们的研究揭示了同步繁殖与繁殖群体的社会结构之间的强烈对应关系。这表明配对之间的同步不是基于机会的简单过程，而是由更复杂的社会性支撑的机制，可以延续到其他行为环境。

更新日期：2019-09-18

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