DISSERTATION RESEARCH: Extra-pair behavior and female fitness in the dark-eyed junco (Junco hyemalis)

论文研究：黑眼灯笼草 (Junco hyemalis) 的额外配对行为和雌性适应性

• 批准号: 0808051
• 负责人: Ellen Ketterson
• 金额: $ 0.95万
• 依托单位: Indiana University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-05-15 至 2010-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0808051&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; Extra; pair; behavior

This project examines extra-pair mating in birds from the female perspective. The research asks whether females that mate with more than one male benefit directly, by producing more offspring than they would if they mated with just one male, or indirectly, by producing offspring of higher quality. Conclusions will be based on DNA samples collected over 18 years from more than 4000 individuals and on long-term records of population dynamics and reproductive success. The study species, the dark-eyed junco, is a socially monogamous songbird. Males and females form a long-term pair bond and jointly raise offspring, but ~25% of all offspring are sired by a male other than the socially bonded male. Extra-pair mating is easily understood from the male?s perspective; a male?s reproductive success will increase if he mates with multiple females. Less clear is why females participate in this behavior, and past research has not resolved the question. The duration and scope of this study provide a unique opportunity to examine the influence of mating patterns on lifetime reproductive success of females. Results will clarify the potential for sexual selection in a species with a complex mating system.

该项目从雌性角度研究鸟类的配对外交配。这项研究询问，与超过一只雄性交配的雌性是否会直接受益（比只与一只雄性交配产生更多的后代），或者间接受益（产生更高质量的后代）。 结论将基于 18 年来从 4000 多名个体中收集的 DNA 样本以及种群动态和繁殖成功的长期记录。研究对象是黑眼朱雀，是一种实行一夫一妻制的社会鸣禽。 雄性和雌性形成长期的配对关系并共同抚养后代，但约 25% 的后代是由除具有社会联系的雄性以外的雄性所生的。从雄性的角度来看，配对外的交配很容易理解。如果雄性与多个雌性交配，其繁殖成功率将会提高。 不太清楚的是为什么女性会参与这种行为，过去的研究也没有解决这个问题。这项研究的持续时间和范围提供了一个独特的机会来研究交配模式对雌性一生繁殖成功的影响。 结果将阐明具有复杂交配系统的物种进行性选择的潜力。