Oxytocin is associated with infant-care behavior and motivation in cooperatively breeding marmoset monkeys
Oxytocin is associated with infant-care behavior and motivation in cooperatively breeding marmoset monkeys
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DOI：
10.1016/j.yhbeh.2016.01.008
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发表时间：
2016-04-01
影响因子：
3.5
通讯作者：
Burkart, Judith M.
中科院分区：
文献类型：
--
作者：
Finkenwirth, Christa;Martins, Eloisa;Burkart, Judith M.
神经激素催产素（OT）积极参与哺乳动物的养育和社会联系的调节，因此也可能是重要的异源父母照顾的调解。在合作繁殖中，幼猴由父母和成年和亚成年的非生殖帮助者（通常是年长的兄弟姐妹）共同抚养。尽管高内在动机，这可能是由激素启动介导的，但由于照顾者之间的竞争，并不是所有的人都能同样地为婴儿护理做出贡献。在各种照顾行为中，积极主动的食物分享可能最能反映动机水平，因为它可以由几个人随意执行，即使多余的照顾者之间的竞争限制了对婴儿的接触。我们的目的是研究群体生活的绒猴尿OT水平和照顾行为之间的联系，同时考虑到与其他成年人和婴儿年龄的联系。在8个生殖周期，26个人进行了监测尿基线OT，照顾行为（舔婴儿，梳理，携带，和积极的食物共享），和成人导向的联系。平均催产素水平普遍最高的女性育种和催产素显着增加出生后的所有个人。在婴儿早期，高尿OT水平与增加婴儿舔，但低水平的成人联系，并在婴儿后期，与增加积极主动的食物分享。我们的研究结果表明，在绒猴父母和异源父母，OT积极参与监管的照顾，从而反映了不断变化的需求在婴儿的发展。这特别包括更有可能反映内在护理动机的行为，表明OT和婴儿护理的动机调节之间存在正相关。(C)2016 Elsevier Inc. All rights reserved.
The neurohormone oxytocin (OT) is positively involved in the regulation of parenting and social bonding in mammals, and may thus also be important for the mediation of alloparental care. In cooperatively breeding marmosets, infants are raised in teamworlc by parents and adult and sub-adult non-reproductive helpers (usually older siblings). Despite high intrinsic motivation, which may be mediated by hormonal priming, not all individuals are always equally able to contribute to infant-care due to competition among care-takers. Among the various care-taking behaviors, proactive food sharing may reflect motivational levels best, since it can be performed ad libitum by several individuals even if competition among surplus care-takers constrains access to infants. Our aim was to Study the link between urinary OT levels and care-taking behaviors in group-living marmosets, while taking affiliation with other adults and infant age into account. Over eight reproductive cycles, 26 individuals were monitored for urinary baseline OT, care-taking behaviors (baby-licking,-grooming,-carrying, and proactive food sharing), and adult-directed affiliation. Mean OT levels were generally highest in female breeders and OT increased significantly in all individuals after birth. During early infancy, high urinary OT levels were associated with increased infant-licking but low levels of adult-affiliation, and during late infancy, with increased proactive food sharing. Our results show that, in marmoset parents and alloparents, OT is positively involved in the regulation of care-taking, thereby reflecting the changing needs during infant development. This particularly included behaviors that are more likely to reflect intrinsic care motivation, suggesting a positive link between OT and motivational regulation of infant-care. (C) 2016 Elsevier Inc. All rights reserved.