Reproductive Parameters of Wild Trachypithecus leucocephalus: Seasonality, Infant Mortality and Interbirth Interval
Reproductive Parameters of Wild Trachypithecus leucocephalus: Seasonality, Infant Mortality and Interbirth Interval
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DOI：
10.1002/ajp.20688
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发表时间：
2009-07-01
影响因子：
2.4
通讯作者：
Pan, Wen-Shi
中科院分区：
文献类型：
--
作者：
Jin, Tong;Wang, De-Zhi;Pan, Wen-Shi
了解濒危灵长类物种的生殖参数对于评估种群状况和制定适当的保护措施至关重要。本文首次对广西崇左县农关喀斯特山区野生白头叶猴的繁殖参数进行了详细的分析。从1998年到2002年，根据系统人口普查，人口中共有133名活产婴儿。出生发生在全年，但时间模式与温度和降雨量的季节变化高度相关，出生高峰与干燥和寒冷的11月至3月相吻合。平均出生率为每名女性每年0.47 +/-0.13胎，20个月以下婴儿的死亡率为15.8%。从1998年到2006年，在四个重点群体中，有14名女性生育了41名婴儿。雌性叶猴初次生育的平均年龄为5 - 6岁（n = 5），出生间隔（IBI）为23.2 +/-5.2个月（中位数= 24.5个月，n = 27）。婴儿在19 - 21个月时断奶。断奶前婴儿丢失的雌性动物的IBI显著短于婴儿存活的雌性动物。白头叶猴的出生季节性似乎受到食物供应季节性变化的影响。发现受孕的时间与食物供应的高峰期相吻合。繁殖参数白头叶猴这里报道的是非常相似的其他colobine物种的报道。一个主要的区别是我们观察到的较低的婴儿死亡率在Tracypithecus。am. J. Primatol. 71：558 - 566，2009. (C)2009 Wiley-Liss，Inc.
Understanding the reproductive parameters of endangered primate species is vital for evaluating the status of populations and developing adequate conservation measures. This study provides the first detailed analysis of the reproductive parameters of wild white-headed langurs (Trachypithecus leucocephalus), based on demographic data collected over an 8-year period in the Nongguan Karst Hills in Chongzuo County, Guangxi, China. From 1998 to 2002, a total of 133 live births were recorded in the population based on systematic censuses. Births occurred throughout the year, but the temporal pattern was highly correlated with seasonal variation in temperature and rainfall, with the birth peak coinciding with the dry and cold months of November-March. The average birthrate was 0.47 +/- 0.13 births per female per year and mortality for infants younger than 20 months was 15.8%. From 1998 to 2006, 14 females gave birth to 41 infants in four focal groups. The average age at first birth for female langurs was 5-6 years (n = 5) and the interbirth interval (IBI) was 23.2 +/- 5.2 months (median = 24.5 months, n = 27). Infants are weaned at 19-21 months of age. The IBI for females with infant loss before weaning was significantly shorter than those for females whose infants survived. It appears that birth seasonality in the white-headed langurs is influenced by seasonal changes in food availability. The timing of conceptions was found to coincide with peak food availability. The reproductive parameters for white-headed langurs reported here are quite similar to those reported for other colobine species. One major difference is our observation of lower infant mortality in Trachypithecus. Am. J. Primatol. 71:558-566, 2009. (C) 2009 Wiley-Liss, Inc.