Nonmaternal Infant Handling in Wild White-Headed Langurs (Trachypithecus leucocephalus)
Nonmaternal Infant Handling in Wild White-Headed Langurs (Trachypithecus leucocephalus)
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DOI：
10.1007/s10764-015-9823-7
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发表时间：
2015-04-01
影响因子：
2.5
通讯作者：
Yao, Meng
中科院分区：
文献类型：
--
作者：
Jin, Tong;Wang, Dezhi;Yao, Meng
许多灵长类物种的婴儿与母亲以外的群体成员有广泛的互动，这可能会影响婴儿的健康。非产妇婴儿处理的模式根据母亲的反应以及社会合作伙伴的数量，性别，年龄和主导地位而有所不同。本研究的主要目的是确定中国西南部广西农官山野生白头叶猴（Trachypithecus leucocephalus）非母婴处理行为的基本模式并探讨其功能。我们报告了在67个月的实地研究中，在六个出生季节出生的15名婴儿出生后的前3个月的非母体相互作用。我们观察到的非母亲的婴儿处理通常是以拥抱的形式，母亲允许大多数处理尝试。婴儿从出生后第一天起就由非母亲处理。在出生后的第一个月，婴儿花费20-30%的白天与非母亲相关，与非母亲接触的时间随着婴儿年龄的增长而减少。非产妇婴儿处理率随性别和年龄的处理者显着变化。少年和亚成年女性处理婴儿显着超过预期的比例代表在组中，而成年女性这样做的频率低于预期。年龄较大的男婴和少年雄性很少接触婴儿，成年雄性从不这样做。婴儿处理行为与处理者相对于母亲的优势等级无关。我们的数据，虽然在某些分析有限，是符合的预测学习到母亲的假设，但不支持女性竞争或联盟形成的假设。
Infants of many primate species have extensive interactions with group members other than their mothers, which can affect an infant's fitness. Patterns of nonmaternal infant handling vary according to the mother's response as well as the number, sex, age, and dominance ranks of social partners. The primary goal of this study was to identify the basic pattern and explore the function of nonmaternal infant handling behavior in wild white-headed langurs (Trachypithecus leucocephalus) at the Nongguan Hills in Guangxi, Southwest China. We report nonmaternal interactions in the first 3 mo after birth for 15 infants born during six birth seasons in a 67-mo field study. The nonmaternal infant handling we observed was generally in the form of caregiving, and mothers permitted most handling attempts. Infants were handled by nonmothers from the first day after birth. Infants spent 20-30% of the daytime associated with nonmothers during the first month of life, and time in contact with nonmothers decreased with infant age. Rates of nonmaternal infant handling varied significantly with the sex and age of handlers. Juvenile and subadult females handled infants significantly more than expected from their proportional representations in the group, whereas adult females did so less frequently than expected. Older male infants and juvenile males rarely handled infants, and adult males never did so. Infant handling behavior showed no correlation with the dominance rank of handlers relative to the mothers. Our data, although limited in some analyses, are in line with the predictions of the learning-to-mother hypothesis, but do not support the female competition or alliance formation hypotheses.