Hormonal Provisioning and Cross-Generational Influences in the Wood Duck

木鸭的荷尔蒙供应和跨代影响

• 批准号: 0710455
• 负责人: John Eadie
• 金额: $ 1.2万
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-04-01 至 2008-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0710455&HistoricalAwards=false
• 关键词: Hormonal; Provisioning; Cross; Generational; Influences

Hormonal Provisioning and Cross-Generational Influences in the Wood DuckJohn M. Eadie and Nicole Suzanne Odell. Proposal # IOS-0710455This study will examine how females may alter the development of their offspring other than by the direct effects of genetic inheritance or parental care. The central question is whether female Wood Ducks (Aix sponsa) manipulate hormones in their eggs to influence the development rate, personality-type, or adult reproductive behavior of their offspring. This is an intriguing question for species exhibiting brood parasitism, a behavior in which two or more females lay eggs in the same nest but only one female incubates the eggs. In such species, maternal hormones could have a profound influence on their offspring's future reproductive behavior. To evaluate this possibility, this study will: (1) examine variation in egg hormones within and among clutches of individual females, (2) determine if yolk hormones influence the development or personality-type of offspring, and (3) evaluate whether female reproductive tactics (host versus parasite) reflect hormone levels and are transferable from mother to offspring. Hormone samples will be taken from adult females, eggs and ducklings, behavioral observations will be conducted on adult females to monitor their reproductive tactics, and behavioral tests will be completed on ducklings from hatch to 45 days of age. The intellectual merits of this study are twofold: (1) it will provide a fresh outlook on a well-studied system by integrating two fields of inquiry, physiology and animal behavior; and (2) it will help to develop a framework for future work on the possible transfer of maternal traits to offspring. The broader impacts of the study include: (1) an evaluation of how conservation management actions may impact organisms on a physiological level; and (2) the development of internship opportunities to allow undergraduates from different fields and unrepresented groups, such as women and minority groups, to participate in a large field study and gain hands-on experience in animal behavior research.

木鸭的荷尔蒙供给和跨代影响约翰·M·伊迪和妮可·苏珊娜·奥德尔。 提案# IOS-0710455这项研究将研究除了遗传或父母照顾的直接影响之外，女性如何改变后代的发育。核心问题是雌性林鸳鸯（Aix sponsa）是否会操纵卵中的激素来影响后代的发育速度、性格类型或成年生殖行为。 对于表现出巢寄生性的物种来说，这是一个有趣的问题，巢寄生是一种行为，其中两个或多个雌性在同一个巢中产卵，但只有一个雌性孵化鸡蛋。在这些物种中，母性激素可能对其后代未来的生殖行为产生深远的影响。为了评估这种可能性，本研究将：（1）检查雌性个体内部和群体之间卵子激素的变化，（2）确定卵黄激素是否影响后代的发育或性格类型，以及（3）评估雌性生殖策略（宿主与寄生虫）是否反映了激素水平并且可以从母亲转移到后代。将从成年雌性、鸡蛋和小鸭身上采集激素样本，对成年雌性进行行为观察以监测其繁殖策略，并对孵化至45日龄的小鸭进行行为测试。这项研究的智力价值有两个：（1）它将通过整合生理学和动物行为两个探究领域，为一个经过深入研究的系统提供新的视角； (2) 它将有助于为未来有关母性特征可能遗传给后代的工作制定一个框架。该研究更广泛的影响包括：（1）评估保护管理行动如何在生理水平上影响生物体； （2）开发实习机会，让来自不同领域和未代表性群体（例如妇女和少数群体）的本科生参与大型实地研究并获得动物行为研究的实践经验。