Abstract
Evolutionary Biology Kin selection, the selection of behaviors that benefit kin, is key to social and cooperative behavior. Primates can recognize kin through heritable facial traits. The question is whether this behavior is incidental from shared genes or if it is instead subject to selection. Charpentier et al. studied the behavior of mandrills, nonhuman primates that live in enormous groups composed of matrilines, in which daughters stay with the mother and sons disperse. Using sophisticated artificial intelligence, they graded facial resemblances and correlated them with the social interactions of maternal and paternal half-siblings. The authors found evidence of selection for kin recognition and discuss differences between maternal and paternal half-siblings and the intricacies resulting from different social settings and the selective forces involved. Sci. Adv. 10.1126/sciadv.aba3274 (2020).
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