4.7 Article

Social networks in primates: smart and tolerant species have more efficient networks

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SCIENTIFIC REPORTS
卷 4, 期 -, 页码 -

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NATURE PORTFOLIO
DOI: 10.1038/srep07600

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资金

  1. NIH [OD-011197]
  2. University of Strasbourg Institute for Advanced Study (USIAS)
  3. Fyssen Foundation
  4. Universite Franco Italienne [25980YL]
  5. Swiss National Science Foundation [CRSI33_133040]
  6. Canada Research Chairs Program
  7. NSERCC (Natural Sciences and Engineering Research Council of Canada)
  8. Alberta Innovates Technology Futures
  9. International Primatological Society
  10. Sigma Xi
  11. University of Calgary
  12. NSF CAREER Award [0847351]
  13. Japan Ministry of Environment, Culture, Sports, Science and Technology (MEXT)
  14. Japan Society for the Promotion of Sciences (JSPS)
  15. Cooperative Research Program of the Wildlife Research Center, Kyoto University
  16. Swiss National Science Foundation (SNF) [CRSI33_133040] Funding Source: Swiss National Science Foundation (SNF)
  17. Divn Of Social and Economic Sciences
  18. Direct For Social, Behav & Economic Scie [0847351] Funding Source: National Science Foundation
  19. Grants-in-Aid for Scientific Research [24770232] Funding Source: KAKEN

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Network optimality has been described in genes, proteins and human communicative networks. In the latter, optimality leads to the efficient transmission of information with a minimum number of connections. Whilst studies show that differences in centrality exist in animal networks with central individuals having higher fitness, network efficiency has never been studied in animal groups. Here we studied 78 groups of primates (24 species). We found that group size and neocortex ratio were correlated with network efficiency. Centralisation (whether several individuals are central in the group) and modularity (how a group is clustered) had opposing effects on network efficiency, showing that tolerant species have more efficient networks. Such network properties affecting individual fitness could be shaped by natural selection. Our results are in accordance with the social brain and cultural intelligence hypotheses, which suggest that the importance of network efficiency and information flow through social learning relates to cognitive abilities.

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