Determinants of affiliative interactions between adult males and lactatingfemales in pigtail macaques (Macaca nemestrina nemestrina)

Authors
Citation
D. Maestripieri, Determinants of affiliative interactions between adult males and lactatingfemales in pigtail macaques (Macaca nemestrina nemestrina), ETHOLOGY, 106(5), 2000, pp. 425-439
Citations number
37
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Animal Sciences","Neurosciences & Behavoir
Journal title
ETHOLOGY
ISSN journal
0179-1613 → ACNP
Volume
106
Issue
5
Year of publication
2000
Pages
425 - 439
Database
ISI
SICI code
0179-1613(200005)106:5<425:DOAIBA>2.0.ZU;2-1
Abstract
In some species of Cercopithecine primates, unrelated adult males and femal es maintain affiliative relationships ('friendships') that are apparently u nrelated to mating or parental care. This study investigated the occurrence of friendships in a captive group of pigtail macaques, and some of their p ossible determinants. Study subjects were six adult males and 15 adult fema les with their newborn infants. Females were focally observed for 2 h every week during the first 12 wk of lactation. With the exception of the fourth -ranking male, adult males showed little interest in initiating affiliative interactions with lactating females and their infants. Most episodes of co ntact and grooming were initiated by high-ranking females and directed to t he alpha male. Because female grooming was not generally reciprocated by th e alpha male, it is likely that females benefited from associating with him in terms of agonistic support or protection. Genetic data on paternity det ermination indicated that the fourth-ranking male, who displayed high level s of affiliation towards mother-infant dyads, sired most of the infants bor n in the group in the year prior to this study. Thus, whereas females may b e interested in associating with males to obtain their support, some males may affiliate with females as a consequence of their previous mating relati onships with them or to increase the chances of future mating success. Take n together, however, the findings of this study provide little evidence tha t adult males and lactating females maintain strong reciprocal bonds that m ay qualify as friendships.