Cognitive performance is linked to group size and affects fitness in Australian magpies.
Cognitive performance is linked to group size and affects fitness in Australian magpies.
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DOI：
10.1038/nature25503
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发表时间：
2018-02-15
期刊：
影响因子：
64.8
通讯作者：
Thornton A
中科院分区：
文献类型：
--
作者：
Ashton BJ;Ridley AR;Edwards EK;Thornton A
社会智力假说认为，社会生活的需求驱动认知进化。这一观点得到了比较研究的支持，这些研究将群体规模或交配系统的变化与不同物种的认知和神经解剖学差异联系起来，但研究结果是矛盾和有争议的。为了理解社会性的认知后果，研究物种内的社会变异也很重要。在这里，我们表明，在野生的，合作繁殖的澳大利亚喜鹊，生活在较大的群体中的个人表现出较高的认知能力，这反过来又与增加繁殖成功。个体表现在四个认知任务中高度相关，暗示了认知表现的“一般智力因素”。对不同年龄青少年的重复认知测试表明，群体规模与认知的相关性出现在生命早期，这表明生活在较大的群体中促进认知发展。此外，我们发现了女性的任务表现和三个指标的生殖成功之间的正相关，从而确定了更大的认知性能的选择性好处。总之，这些结果提供了关键的种内证据，社会性可以塑造认知发展和进化。
The Social Intelligence Hypothesis argues that the demands of social life drive cognitive evolution. This idea receives support from comparative studies linking variation in group size or mating systems with cognitive and neuroanatomical differences across species, but findings are contradictory and contentious. To understand the cognitive consequences of sociality it is also important to investigate social variation within species. Here we show that in wild, cooperatively breeding Australian magpies, individuals living in larger groups show elevated cognitive performance, which in turn is linked to increased reproductive success. Individual performance was highly correlated across four cognitive tasks, hinting towards a “general intelligence factor” underlying cognitive performance. Repeated cognitive testing of juveniles at different ages showed that the group size – cognition correlation emerged in early life, suggesting that living in larger groups promotes cognitive development. Furthermore, we found a positive association between female task performance and three indicators of reproductive success, thus identifying a selective benefit of greater cognitive performance. Together, these results provide critical intraspecific evidence that sociality can shape cognitive development and evolution.
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