]*>","")" /> 麻阳河自然保护区黑叶猴夏季的夜宿行为

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麻阳河自然保护区黑叶猴夏季的夜宿行为

韩家亮 胡刚   

  • 出版日期:2012-11-22 发布日期:2012-11-20

Sleeping behavior of wild Franois’langur (Trachypithecus francoisi)at Mayanghe Nature Reserve in summer,Guizhou China

HAN Jialiang ,HU Gang   

  • Online:2012-11-22 Published:2012-11-20

关键词: 黑叶猴, 夏季, 夜宿行为, 麻阳河

Abstract: During the period from July to August 2011,we recorded the sleeping behavior,including the time allotted to enter and exit the sleeping site,pre-sleeping and sleeping,of two groups of wild Francois’langur (Trachypithecus francoisi) at Mayanghe Nature Reserve via focus animal sampling. Results indicated that:1)the langurs spent the most time (583.1min on average)sleeping,and the time allotted to exit the sleeping site and pre-sleeping were 22. 9 and 17.7 minutes respectively. They spent the least time (8 minutes)for enter into the sleeping site;2)the time allotted for sleeping was significantly negatively correlated with the length of daytime. The group the inhabited more disturbed habitat (XGB) spent significantly more time entering the sleeping site,and less time pre-sleeping and sleeping than did the group in less disturbed habitat (LYY),and XGB animals also spent more time exiting the sleeping site in the morning that LYY,though the difference is not significant. These differences may indicate that groups in disturbed habitats may have to allot more time to alertness for potential disturbances,and thus reasonably reduce the time for pre-sleeping and sleeping;4)sleeping behavior was also influenced by weather conditions:the langurs allotted significantly less time for sleeping and exiting the sleeping site,and more time for entrance to the sleeping site and pre-sleeping on sunny days than they did on rainy days, though the differences of the latter two categories were not significant. This may be because,in comparison with outside ambient conditions,the sleeping site is more comfortable on rainy days,and the langurs reasonably spent more time resting and less time for activity. This assumption is according to the ‘Comfort Hypothesis’, which asserts that primates take sleeping sites as shelter from extreme weather conditions.

Key words: Francois’langur (Trachypithecus francoisi), Mayanghe Nature Reserve, Sleeping behavior, Summer