Hella Péter, Marion Laporte, Nicholas E Newton-Fisher, Vernon Reynolds, Liran Samuni, Adrian Soldati, Linda Vigilant, Jakob Villioth, Kirsty E Graham, Klaus Zuberbühler, Catherine Hobaiter
Associating with kin provides individual benefits but requires that these relationships be detectable. In humans, facial phenotype matching might help assess paternity; however, evidence for it is mixed. In chimpanzees, concealing visual cues of paternity may be beneficial due to their promiscuous mating system and the considerable risk of infanticide by males. On the other hand, detecting kin can also aid chimpanzees in avoiding inbreeding and in forming alliances that improve kin-mediated fitness. Although previous studies assessing relatedness based on facial resemblance in chimpanzees exist, they used images of captive populations in whom selection pressures and reproductive opportunities are controlled and only assessed maternity or paternity of adult offspring...
November 7, 2022: Journal of Comparative Psychology