Doctoral Dissertation Improvement: Reproductive Strategies of Male White-Faced Capuchins (Cebus capucinus) in the Santa Rosa Sector of the ACG, Costa Rica

博士论文改进：哥斯达黎加 ACG 圣罗莎区雄性白面卷尾猴 (Cebus capucinus) 的繁殖策略

• 批准号: 0926039
• 负责人: Katharine Jack
• 金额: $ 1.23万
• 依托单位: Tulane University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-15 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0926039&HistoricalAwards=false
• 关键词: Doctoral; Dissertation; Improvement; Reproductive; Strategies

The research objective of this study is to examine how and why dominant males sire the most offspring by collecting behavioral data on males, hormonal data on both sexes, and genetic data in three groups of C. capucinus in the Santa Rosa Sector of the Área de Conservación Guanacaste, Costa Rica. Sexual selection theory suggests that because fertile females are a limited resource, males should compete over access to them and therefore display only low levels of cooperation. White-faced capuchins (Cebus capucinus) live in groups of multiple related females and immigrant males. While the social system of C. capucinus is based on close bonds among group females, it also involves cooperative alliances among group males. Within-group male-male aggression and overt mating competition are rare, with all males participating in the mating system. The socioecological model predicts that when within-group competition is low and between group competition is high, males should have equal reproductive success. Yet, contrary to theoretical predictions and behavioral observations, dominant males sire the majority of offspring. Intellectual Merit: This study is one of few projects involving the simultaneous collection of hormonal data on males and females. In combination with behavioral and genetic data, these data will to contribute to on-going research on reproductive skew theory, to understand proximate causes of variation in male reproductive success, to test the applicability of the Challenge Hypothesis, and to increase the availability of comparative data which can provide insight into human evolution. Broader Impacts: This project will contribute to the database of long-term (25+ years) research on the capuchins of Santa Rosa, while also providing invaluable training for local and foreign assistants in the use of field techniques. This doctoral dissertation research project will contribute to the academic training of a female graduate student.

本研究的研究目的是通过收集雄性的行为数据、两性的荷尔蒙数据以及圣罗莎区三组 C. capucinus 的遗传数据，研究占主导地位的雄性如何以及为何生育最多的后代。瓜纳卡斯特保护区，哥斯达黎加，性选择理论表明，由于具有生育能力的雌性是有限的资源，雄性应该竞争获得它们，因此白脸卷尾猴只表现出低水平的合作。 (Cebus capucinus) 生活在由多个相关雌性和移民雄性组成的群体中，虽然 C. capucinus 的社会系统是基于雌性群体之间的密切联系，但它也涉及群体内雄性之间的合作联盟和公开的攻击。交配竞争很少见，社会生态学模型预测，当群体内竞争较低且群体之间竞争较高时，雄性应该具有平等的繁殖成功率。然而，与理论预测和行为观察相反，主导的智力优势：这项研究是同时收集男性和女性荷尔蒙数据的少数项目之一，这些数据将有助于正在进行的生殖偏差研究。理论，了解男性生殖成功变异的直接原因，测试挑战假设的适用性，并增加比较数据的可用性，从而深入了解人类进化：该项目将为数据库做出贡献。对圣罗莎卷尾猴进行长期（25 年以上）研究，同时还为当地和外国助手提供现场技术使用方面的宝贵培训。该博士论文研究项目将有助于女研究生的学术培训。