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首页> 外文期刊>International Journal of Primatology >Determinants of Paternity Success in a Group of Captive Vervet Monkeys (Chlorocebus aethiops sabaeus)
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Determinants of Paternity Success in a Group of Captive Vervet Monkeys (Chlorocebus aethiops sabaeus)

机译：一群圈养黑长尾猴（Chlorocebus aethiops sabaeus）的亲子关系成功的决定因素

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摘要

Paternity success of high-ranking primate males is affected by the number of males and the number of fertile females and their cycle synchrony. Female vervets in the wild show strong reproductive seasonality and do not advertise the ovulatory period with conspicuous signals or behavior. Because this makes it difficult for males to monopolize fertile females, it can be expected that male reproductive skew in this species is lower than in other cercopithecines living in multimale groups that advertise the ovulatory period. We assessed male reproductive success in a captive vervet group, initially consisting of 4 males and 12 unrelated females. Besides a general low reproductive skew, we predicted paternity success of the alpha males to be dependent on the overlap of synchronously fertile females, month into alpha male tenure, and housing conditions (the subjects were kept in a large park but had to be locked in a small indoor compartment during the winter months). Further, because the number of males reaching their prime increased over time, we predicted a decrease in reproductive success of the alpha male with increasing tenure length of the alpha male. To assess this we collected genetic samples from 27 of 32 offspring born into the group during 3 yr, using 7 polymorphic human microsatellite markers. Contrary to our predictions, reproductive success of the males occupying the alpha position during the study was among the highest found in cercopithecines, with the alpha males siring 78% of all offspring. The degree of overlapping fertile periods did not affect paternity success, nor did paternity success of the alpha male differ between the 2 housing conditions. Only the alpha male’s tenure length had an effect. Alpha male reproductive success decreased over time, which we attribute to either a shift in female mate choice toward younger males or to increased competition among the males in the later stage of the alpha male’s tenure. This study demonstrates the importance of assessing reproductive success of males throughout >1 season and should spawn more research into the role of female choice and postcopulatory mechanisms in this species.
机译：雄性灵长类动物的亲子成功率受男性数量，可育女性数量及其周期同步性的影响。野外的雌性天鹅绒具有很强的繁殖季节，不会以明显的信号或行为宣传排卵期。因为这使雄性难以垄断可育雌性，所以可以预期，该物种的雄性生殖偏斜低于生活在排卵期的多雄性群体中的其他头皮茶碱。我们评估了圈养黑长尾小鸡组中男性的繁殖成功率，该组最初由4名男性和12名无关女性组成。除了普遍的低生殖偏斜外，我们预测阿尔法雄性的父本成功取决于同步繁殖的雌性的重叠，月成阿尔法雄性的任期和住房条件（受试者被关在一个大公园中，但必须锁在在冬季的一个小室内隔间）。此外，由于达到其初生期的雄性数量随时间增加，因此我们预测随着α雄性的任期长度增加，α雄性的生殖成功率将下降。为了评估这一点，我们使用7种多态性人类微卫星标记从3年内出生于该组的32个后代中收集了27个基因样本。与我们的预测相反，在研究过程中，雄性占据了α位的雄性的生殖成功率最高的是头孢噻辛，其中雄性雄性占所有后代的78％。生育期重叠的程度既不影响亲子关系的成功，也不影响阿尔法男性在两种住房条件下的亲子关系的成功。只有阿尔法男性的任职期会产生影响。阿尔法男性的生殖成功随着时间的推移而下降，这归因于雌性伴侣选择转向年轻男性，或者归因于阿尔法男性任期的后期男性之间的竞争加剧。这项研究表明评估整个> 1季内雄性繁殖成功的重要性，并且应该催生更多关于雌性选择和后交机制在该物种中的作用的研究。

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