Doctoral Dissertation Improvement: The Reproductive Trajectories of Geladas (Theropithecus gelada)

博士论文改进：狒狒（Theropithecus gelada）的繁殖轨迹

• 批准号: 0962160
• 负责人: Jacinta Beehner
• 金额: $ 1.99万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-03-15 至 2012-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0962160&HistoricalAwards=false
• 关键词: Doctoral; Dissertation; Improvement; Reproductive; Trajectories

Strong male bonds are rare among primates, especially for female-bonded species. Thus, the relationship between male bonding and reproductive strategies remains largely unexamined in female-bonded species. Geladas (Theropithecus gelada) provide an ideal model for understanding how male bonds influence male reproductive trajectories in a female-bonded species. Prior to acquiring reproductive access to females, "bachelor" geladas live in cohesive all-male groups. Eventually, males graduate from these groups to gain sole reproductive access to a group of females (one-male unit). Bachelors acquire one-male units using one of several strategies: (1) directly overthrowing the leader male, (2) submissively entering a unit and attempting to pare females away from the unit over time, or (3) capitalizing on the chaos of a recent takeover to opportunistically mate with females. Additionally, bachelors have been observed to cooperate in attempts to overthrow leader males and enter one-male units with former members of their all-male group - yet only one male eventually reaps the reproductive benefits. This project investigates the behavioral and hormonal factors that shape the reproductive trajectory of gelada males as they move from an all-male group to a one-male unit. The researchers will(i) describe the social interactions among bachelors within their all-male group; (ii) determine the behavioral and hormonal factors that influence bachelor participation in takeover attempts of leader males, and (iii) determine whether bachelor quality predicts a reproductive strategy. Behavioral data and noninvasive fecal hormone sampling will document the reproductive trajectories of male geladas. Additionally, digital photographs will be taken of male chest patch color - a feature that may indicate male quality - to document changes in color as males move from their bachelor groups to one-male units. Results from this research will inform conservation decisions regarding these rare primates, and the investigator's presence in the Simien Mountains National Park help deter illegal activities in this World Heritage Site that is in danger. This project provides income and training to local Ethiopian field assistants and the co-PI has arranged to explain gelada behavior to high school students in several U.S. states.

灵长类动物中的强雄性纽带很少见，尤其是对于女性键入的物种。因此，男性粘结与生殖策略之间的关系在女性束缚物种中基本上仍未进行。 Geladas（Theropithecus gelada）提供了理想的模型，用于了解男性纽带如何影响雌性粘结物种中的男性生殖轨迹。在获得获得女性的生殖机会之前，“单身汉” Geladas居住在凝聚力的全男子群体中。最终，男性从这些群体毕业，以获得对一群女性（单人单位）的独一生殖通道。单身汉使用几种策略之一购买了单元单位：（1）直接推翻领导者男性，（2）顺从地进入一个单位，并试图随着时间的推移将女性远离该单位，或（3）利用最近的收购的混乱，以机会与女性交配。此外，已经观察到单身汉与他们的全男性团体的前成员一起推翻领导人的男性并进入一级单位，但只有一名男性最终获得了生殖益处。该项目调查了塑造胶质雄性从全男子组转变为单个单位的行为和荷尔蒙因素。研究人员将（i）描述其全男性团体中的学士学位之间的社会互动； （ii）确定影响学士参与领导者的接管尝试的行为和激素因素，（iii）确定学士学位质量是否预测了生殖策略。行为数据和非侵入性粪便激素采样将记录雄性Geladas的生殖轨迹。此外，将拍摄男性胸部斑块颜色的数码照片 - 一种可能表明男性质量的功能，可以记录颜色的变化，因为男性从单身汉群体转变为单个单元。这项研究的结果将为这些稀有灵长类动物的保护决定提供依据，调查员在Simien Mountains国家公园的存在有助于阻止该世界遗产处于危险的遗产中的非法活动。 该项目为当地的埃塞俄比亚现场助理提供了收入和培训，Co-Pi已安排向美国几个州的高中学生解释Gelada的行为。