Constraints on control:: factors influencing reproductive success in male mandrills (Mandrillus sphinx)
Constraints on control:: factors influencing reproductive success in male mandrills (Mandrillus sphinx)
复制标题
DOI：
10.1093/beheco/ari034
复制
发表时间：
2005-05-01
影响因子：
2.4
通讯作者：
Wickings, EJ
中科院分区：
文献类型：
--
作者：
Charpentier, M;Peignot, P;Wickings, EJ
在过去的十年中，使用分子标记的父权分析表明，观察到的交配系统与生殖系统并不一定相关，因此不能提供关于雄性生殖成功（RS）的可靠信息。对于具有复杂的多雌多雄社会组织的灵长类动物来说尤其如此，比如山魈（Mandrillus sphinx）。研究人员利用分子标记测量个体RS，并收集了来自27个出生队列的193个后代的综合数据集，在20年的采样期间，研究了可能影响生活在半自由放养群体中的优势雄性山雀父权概率的社会、遗传和人口因素。我们观察到RS向优势雄性的显著倾斜，随着群体中成年雄性数量的增加，以及当他们与从属的青春期雄性密切相关时，他们的父权概率增加。相反，当同时膨胀的雌性数量增加时，占统治地位的雄性生育婴儿的可能性就会降低。当雌性伴侣与优势雄性亲缘关系密切，以及优势雄性与从属成年雄性亲缘关系增加时，优势雄性所产生的后代较少。最后两点特别表明，亲属识别机制的运作是为了避免近亲繁殖的成本，也可能反映了优势雄性失去受孕机会给关系更密切的从属成年雄性的成本更低。据我们所知，这项研究是灵长类动物中首次使用综合方法和多变量分析来表明多种因素参与决定优势雄性的父权概率的研究之一。
Over the last decade, paternity analysis using molecular markers has revealed that observed mating systems do not necessarily correlate with reproductive systems and thus cannot provide reliable information about male reproductive success (RS). This is especially true for primate species with a complex multimale-multifemale social organization, such as mandrills (Mandrillus sphinx). Using molecular markers for the measurement of individual RS and a comprehensive data set comprising 193 offspring from 27 birth cohorts over a 20-year period of sampling, we investigated the social, genetic, and demographic factors that may influence the probability of paternity by dominant male mandrills, living in a semi-free-ranging colony. We observed a significant skew in RS towards dominant males, with their probability of paternity increasing as the number of adult males in the group increased, and when they were closely related to subordinate adolescent males. Conversely, the probability of dominant males siring infants decreased when the number of simultaneously tumescent females increased. Fewer offspring were sired by dominant males when female partners were closely related to them and when the relatedness between dominant and subordinate adult males increased. These two last points suggests particularly that mechanisms of kin recognition are operating to avoid the costs of inbreeding and may also reflect the lower costs to dominant males of losing conception opportunities to more closely related subordinate adult males. This study is, to our knowledge, one of the first in primates to use an integrative approach and multivariate analysis to show that multiple factors are involved in determining the probability of paternity by dominant males.