HAZARD RATES AND CAUSES OF DEATH IN A CAPTIVE GROUP OF CRAB-EATING MONKEYS (MACACA-FASCICULARIS)
HAZARD RATES AND CAUSES OF DEATH IN A CAPTIVE GROUP OF CRAB-EATING MONKEYS (MACACA-FASCICULARIS)
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DOI：
10.1002/ajp.1350300206
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发表时间：
1993-01-01
影响因子：
2.4
通讯作者：
LUDER, HU
中科院分区：
文献类型：
--
作者：
LUDER, HU
在试图检查年龄特异性死亡率和各种死亡原因的阶段之间的可能关联，159名男性和192名女性食蟹猴（Macaca fascicularis），作为一个单一的组，进行了分析的生命记录。使用非参数核方法，估计男性和女性与五种不同死亡原因类别相关的生存率和风险率。获得的总生存期和风险函数与先前报道的恒河猴相似。在按年龄划分的死亡率的两个阶段中，第一阶段的特点是危险率迅速下降，直到大约1.5 - 2岁，这一阶段的特点是由于不适合产后生活而死亡。第二阶段持续到10 - 15岁，主要特点是暴力死亡率高。雄性和雌性的相应危险率在生命的早期生殖期达到峰值，此后显著下降。这种模式被解释为表明第二阶段死亡率不太可能与衰老有关，而是似乎取决于外部环境因素。因此，当考虑食蟹猴的总体风险率时，由于猿类生殖的特定方面，衰老的开始可能是隐藏的，并且由于衰老导致的死亡可能仅在10至15岁之后才可察觉。
In an attempt to examine possible associations between stages of age-specific mortality and various causes of death, vital records of 159 male and 192 female crab-eating monkeys (Macaca fascicularis), housed as a single group, were analyzed. Survival and hazard rates associated with each of five distinct categories of causes of death were estimated for males and females, using the nonparametric kernel method. The obtained overall survival and hazard functions were similar to those reported previously for rhesus monkeys. Among two stages identified in age-specific mortality, the first stage, characterized by rapidly decreasing hazard rates up to about 1.5-2 years of age, was discriminated by the occurrence of deaths due to unfitness for postnatal life. The second stage lasted up to the age of 10-15 years and was largely characterized by a high incidence of violent deaths. The respective hazard rates in males and females attained peaks during the early reproductive period of life and markedly decreased thereafter. This pattern was interpreted to indicate that second stage mortality is unlikely related to senescence, but rather, seems to depend on extrinsic environmental factors. Thus, when considering overall hazard rates in Macaca fascicularis, the onset of senescence, as a result of the specific aspects of simian reproduction, may be hidden from view, and mortality due to aging may only be appreciable after 10 to 15 years of age.