Demography of Propithecus verreauxi at Beza Mahafaly, Madagascar : sex ratio, survival, and fertility, 1984-1988
Demography of Propithecus verreauxi at Beza Mahafaly, Madagascar : sex ratio, survival, and fertility, 1984-1988
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马达加斯加 Beza Mahafaly 的 Propithecus verreauxi 人口统计：性别比、生存率和生育率，1984-1988 年
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发表时间：
1991
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通讯作者：
Marion Schwartz
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作者：
A. Richard;P. Rakotomanga;Marion Schwartz
1984年9月至1988年8月，在马达加斯加西南部的Beza Mahafaly特别保护区，对85只狐猴（Propithecus uerreauxi）进行了捕获、标记、释放和监测。本文介绍了这一群体的年龄和性别结构以及年龄别生育率和存活率的估计。使用从这个和其他研究的数据，它表明，狐猴三级性别比不偏离5050显着，但他们确实显着不同的单鼻灵长类动物，其中有强烈的女性偏见三级性别比。两个人口统计学机制，可能会导致这种区别被认为：1）间歇性男性偏见的出生队列中的sifakas和2）不同的模式的幸存者-船舶在haplorhines和sifakas。
Eighty-five sifakas (Propithecus uerreauxi) have been cap- tured, marked, released, and monitored between September 1984 and August 1988 at the Beza Mahafaly Special Reserve in southwest Madagascar. Esti- mates are presented of the age and sex structure of this population and of age-specific fertility and survival. Using data from this and other studies, it is shown that sifaka tertiary sex ratios do not depart significantly from 5050, but that they do differ significantly from those of haplorhine primates, which have strongly female-biased tertiary sex ratios. Two demographic mechanisms that could give rise to this distinction are considered: 1) intermittently male-biased birth cohorts among sifakas and 2) different patterns of survivor- ship in haplorhines and sifakas.