Rank relations among sisters in semi-free-ranging Barbary macaques (Macaca sylvanus)

• Published in: International journal of primatology 1993-06, Vol.14 (3), p.405-420
• Main Authors: PRUD'HOMME, J, CHAPAIS, B
• Format: Article
• Language: English
• Subjects: Animal ethology; Biological and medical sciences; Fundamental and applied biological sciences. Psychology; Macaca sylvanus; Mammalia; Psychology. Psychoanalysis. Psychiatry; Vertebrata
• ISSN: 0164-0291; 1573-8604
• DOI: 10.1007/bf02192774

Although semi-free-ranging Barbary macaque females are able to outrank older females from lower-ranking matrilines (matrilineal rank acquisition), they do not systematically outrank their older sisters, as is known to be the case for semi-free-ranging rhesus monkeys (Macaca mulatta ) and Japanese macaques (Macaca fuscata ). We test the hypothesis that differences in the support received by younger sisters against their older sisters and against older lower-ranking females might account for this interspecific difference. Thirty-one sister dyads, members of a group of 109 Barbary macaques living at La Montagne des Singes, France, were observed during 16 months. The results indicate that (1) all females were dominant to their younger sisters, and the latter were never observed to challenge their older sisters; (2) younger sisters received as much kin support against their older sisters as against older lower-ranking females; (3) only very young females received support from their kin against their older sisters; (4) younger sisters received much more support from nonkin females against lower-ranking females with against their older sisters; and (5) Barbary macaque females appear to be supported against their older sisters less frequently than rhesus macaque females are.