Effect of infant pelage colour on infant caring by other group members: a case study of wild Javan lutungs (Trachypithecus auratus)
Effect of infant pelage colour on infant caring by other group members: a case study of wild Javan lutungs (Trachypithecus auratus)
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DOI：
10.1163/1568539x-bja10064
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发表时间：
2021-02
期刊：
影响因子：
1.3
通讯作者：
S. P. Trisilo-;K. Widayati;Yamato Tsuji
中科院分区：
文献类型：
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作者：
S. P. Trisilo-;K. Widayati;Yamato Tsuji
2018年1月至3月，我们观察了群体成员与7只爪哇石斑羚(Trachypithecus Auratus)幼体的互动。婴儿的毛发颜色由亮黄色变为黑色，平均2.9个月后黄色消失，平均6.1个月后颜色变化完成。黄色绒毛的婴儿被抱和尖叫的时间更长，而黑色绒毛的婴儿移动和喂奶的时间更长。随着婴儿的毛发变黑，邻近动物的数量减少，这表明群体成员被婴儿的黄色所吸引。随着毛皮变黑和幼崽的年龄增长，邻近的动物表现出更多的社会行为。我们的结果表明，亮黄色的羽毛颜色会触发它们的父母本能。鲜艳的羽毛颜色会让婴儿受益，因为群体成员会保护他们免受陌生雄性和捕食者的伤害。
We observed interactions of group members with seven Javan lutungs (Trachypithecus auratus) infants from January to March 2018. Infants’ pelage colouration changed from bright yellow to black, and it took about 2.9 months (on average) until the yellowness disappeared, and about 6.1 months (on average) until the colouration change was completed. Infants with yellow pelage spent more time being held and screaming, while infants with black pelage spent more time moving and feeding. The number of neighbouring animals decreased as the infants’ pelage became black, which implied that group members are attracted to the yellowness of infants. As the pelage became black and the infant aged, the neighbouring animals exhibited more social behaviour. Our results implied that bright yellow pelage colour triggers their parental instincts. The bright pelage colour would benefit infants because group members protect them from unfamiliar males and predators.