Istituto di Scienze e Tecnologie della Cognizione, Consiglio Nazionale delle Ricerche, Via Ulisse Aldrovandi 16b, 00197, Rome, Italy.
Dipartimento di Biologia Ambientale, Sapienza Università di Roma, Rome, Italy.
Anim Cogn. 2019 Nov;22(6):1159-1169. doi: 10.1007/s10071-019-01308-8. Epub 2019 Sep 17.
Attempts to measure dominance relationships using cardinal, rather than ordinal ranks have a long history. Nevertheless, it is still unclear if cardinal dominance ranks have an impact on the life of animals. In particular, no information is available on how individual group living animals represent their own dominance hierarchy. This can be investigated testing whether cardinal rank differences affect how animals interact with different group mates. In this study, we evaluated how mandrills (Mandrillus sphinx) interacted with group mates in relation to differences in cardinal ranks while controlling for differences in ordinal ranks. Mandrills were more likely both to avoid an approaching group mate and to direct their grooming to a group mate when differences in cardinal ranks were larger (controlling for differences in ordinal ranks). These results suggest mandrills represent their own dominance hierarchy as based on a cardinal, not an ordinal, scale.
使用基数而不是序数来衡量支配关系的尝试由来已久。然而，基数支配等级是否会影响动物的生活仍然不清楚。特别是，关于个体群居动物如何表现自己的支配等级结构，没有任何信息。通过测试基数等级差异是否会影响动物与不同群体成员的互动方式，可以研究这个问题。在这项研究中，我们评估了狒狒（Mandrillus sphinx）在控制了序数等级差异的情况下，与基数等级差异相关的群体成员之间的互动方式。当基数等级差异较大时（控制了序数等级差异），狒狒更有可能避免接近的群体成员，并将梳理行为指向群体成员。这些结果表明，狒狒根据基数而不是序数来代表自己的支配等级结构。
