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Male Tibetan macaques' (Macaca thibetana) choice of infant bridging partners

Zoological Research 2014年第3期35卷 222-230页

作者： Briana BAUER Lori K. SHEERAN Megan D. MATHESON Jin-Hua LI R. Steven WAGNER Primate Behavior and Ecology Program Central Washington University Department of Anthropology Central Washington University Department of Psychology Central Washington University School of Resources and Environment Anhui University School of Life Sciences Anhui Normal University Department of Biological Sciences Central Washington University

Adult male Tibetan(Macaca thibetana), Barbary(M. sylvanus), and stump-tailed macaques(M. arctoides) engage in bridging, a ritualized infant-handling behavior. Previous researchers found a bias toward the use of male infants for this behavior, but its function is debated. Explanations include three hypotheses: paternal care, mating effort, and agonistic buffering. We studied a group of habituated, provisioned Tibetan macaques to test whether adult males' affiliative relationships with females predicted their use of an infant for bridging. We also examined biases for sex, age, and individual in males' choice of bridging infant. We collected data via all occurrences, focal animal, and scan methods, from August to September 2011 at the Valley of the Wild Monkeys, China. We found that male infants were significantly preferred over females for bridging, but of three male infants in the group, only one was used by all males, while one male infant was used less often than expected. Adult males had females they were significantly more likely to be proximate to and/or to groom, but these corresponded to the mother of the bridging infant for only one male. Our results are most consistent with the agonistic buffering hypothesis: lower-ranked males used the alpha male's preferred bridging infant in an attempt to regulate their interactions with the alpha.

关键词： agonistic buffering Affiliated infant Paternal care

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