Alloparenting is associated with reduced maternal lactation effort and faster weaning in wild chimpanzees.
Alloparenting is associated with reduced maternal lactation effort and faster weaning in wild chimpanzees.
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DOI：
10.1098/rsos.160577
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发表时间：
2016-11
影响因子：
3.5
通讯作者：
Sellen DW
中科院分区：
文献类型：
--
作者：
Bădescu I;Watts DP;Katzenberg MA;Sellen DW
当母亲以外的个人帮助照顾婴儿时，在人群之间和人群内可能会有所不同，并且对所涉及的个人具有潜在的健身成本和收益。我们调查了alloparenting的婴儿断奶的速度，一个潜在的组成部分，因为它可以影响出生间隔，在野生黑猩猩（Pan troglodytes schweinfurthii）在Ngogo，乌干达的母亲健身的影响。据我们所知，我们还首次描述了这一人群中的异源养育，并通过粪便稳定氮同位素（δ 15 N）提出了一种新的牛奶对婴儿饮食贡献的测量方法。使用42对母婴，我们测试了两个alloparenting维度，纳塔尔吸引力（对婴儿的兴趣）和婴儿处理（抱，抱），母亲花在喂养上的时间比例和母亲的哺乳努力（平均哺乳率和母婴δ 15 N差异）。无论是纳塔尔的吸引力，也没有婴儿处理与喂养时间显着相关。婴儿处理与哺乳努力的两个措施呈负相关，虽然纳塔尔的吸引力没有显示出关联。通过加速断奶，异性养育可能使母亲能够更快地投资于下一个后代，从而使母亲受益。我们的研究结果强调了在某些物种中，异性养育作为女性生殖策略的灵活组成部分的重要性。
Alloparenting, when individuals other than the mother assist with infant care, can vary between and within populations and has potential fitness costs and benefits for individuals involved. We investigated the effects of alloparenting on the speed with which infants were weaned, a potential component of maternal fitness because of how it can affect inter-birth intervals, in wild chimpanzees (Pan troglodytes schweinfurthii) at Ngogo, Uganda. We also provide, to our knowledge, the first description of alloparenting in this population and present a novel measure of the contribution of milk to infant diets through faecal stable nitrogen isotopes (δ15N). Using 42 mother–infant pairs, we tested associations of two alloparenting dimensions, natal attraction (interest in infants) and infant handling (holding, carrying), to the proportion of time mothers spent feeding and to maternal lactation effort (mean nursing rates and mother–infant δ15N differences). Neither natal attraction nor infant handling was significantly associated with feeding time. Infant handling was inversely associated with both measures of lactation effort, although natal attraction showed no association. Alloparenting may benefit mothers by enabling females to invest in their next offspring sooner through accelerated weaning. Our findings emphasize the significance of alloparenting as a flexible component of female reproductive strategies in some species.
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影响因子：
56.9
作者：
Clutton-Brock, TH;Russell, AF;Cameron, EZ
通讯作者：
Cameron, EZ
影响因子：
2.3
作者：
BERMAN, CM;RASMUSSEN, KLR;SUOMI, SJ
通讯作者：
SUOMI, SJ
影响因子：
1.7
作者：
Arcadi, AC;Wrangham, RW
通讯作者：
Wrangham, RW
影响因子：
2.8
作者：
Fahy, Geraldine E.;Richards, Michael P.;Boesch, Christophe
通讯作者：
Boesch, Christophe
影响因子：
2.5
作者：
Ebensperger, Luis A.;Hurtado, Maria Jose;Leon, Cecilia
通讯作者：
Leon, Cecilia