Sleeping sites, sleeping trees, and sleep-related behaviors of black crested gibbons (Nomascus concolor jingdongensis) at Mt. Wuliang, central Yunnan, China
Sleeping sites, sleeping trees, and sleep-related behaviors of black crested gibbons (Nomascus concolor jingdongensis) at Mt. Wuliang, central Yunnan, China
复制标题
中国云南中部无量山黑冠长臂猿（Nomascus concolor jingdongensis）的睡眠地点、睡眠树及睡眠相关行为
DOI：
10.1002/ajp.20470
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发表时间：
2008-02-01
影响因子：
2.4
通讯作者：
Jiang, Xue-Long
中科院分区：
文献类型：
--
作者：
Fan, Peng-Fei;Jiang, Xue-Long
收集了云南中部一群黑冠长臂猿(Nomascus Concolor Jingdongensis)睡眠相关行为的数据。2005年3月至2006年4月，云南无良，中国。该群体的成员通常组成四个睡眠单位(成年雄性和青少年，成年雌性和一个半依赖的黑色婴儿，成年雌性和一个依赖的黄色婴儿，以及亚成年雄性)分布在不同的睡眠树上。个体或单位更喜欢在特定的区域睡觉，所有的睡眠地点都位于原生林，海拔在2200-2400m之间的占77%。它们往往睡在最高最粗的树上，树冠很大，位于陡峭的山坡上，靠近重要的食物补丁。影响休眠地点选择的因素有：(1)树木特征；(2)可达性；(3)容易逃逸。很少有熟睡的树被同一组或其他组的成员重复使用。长臂猿平均在日落前128分钟进入睡眠树，日出后平均33分钟离开睡眠树。第一个和最后一个进入树的时间平均为17.8min。我们认为，与睡眠相关的行为主要是为了将被捕食者发现的风险降至最低而进行的适应。选择沉睡的树可以使捕食者难以接近和攻击，并在黑暗中提供一条容易的逃生路线。为了应对较高栖息地的寒冷温度，长臂猿通常在夜间坐在一起挤在一起，在寒冷的季节，它们往往睡在蕨类和/或兰花上。
Data on sleep-related behaviors were collected for a group of central Yunnan black crested gibbons (Nomascus concolor jingdongensis) at Mt. Wuliang, Yunnan, China from March 2005 to April 2006. Members of the group usually formed four sleeping units (adult male and juvenile, adult female with one semi-dependent black infant, adult female with one dependent yellow infant, and subadult male) spread over different sleeping trees. Individuals or units preferred specific areas to sleep; all sleeping sites were situated in primary forest, mostly (77%) between 2,200 and 2,400 m in elevation. They tended to sleep in the tallest and thickest trees with large crowns on steep slopes and near important food patches. Factors influencing sleeping site selection were (1) tree characteristics, (2) accessibility, and (3) easy escape. Few sleeping trees were used repeatedly by the same or other members of the group. The gibbons entered the sleeping trees on average 128 min before sunset and left the sleeping trees on average 33 min after sunrise. The lag between the first and last individual entering the trees was on average 17.8 min. We suggest that sleep-related behaviors are primarily adaptations to minimize the risk of being detected by predators. Sleeping trees may be chosen to make approach and attack difficult for the predator, and to provide an easy escape route in the dark. In response to cold temperatures in a higher habitat, gibbons usually sit and huddle together during the night, and in the cold season they tend to sleep on ferns and/or orchids.