U.S.-Chile Cooperative Research: Reproductive Energetics of a South American Caviomorph Rodent Population

美国-智利合作研究：南美卡维奥型啮齿动物种群的生殖能量

• 批准号: 9600578
• 负责人: George Kenagy
• 金额: $ 5.75万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-04-15 至 2000-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9600578&HistoricalAwards=false
• 关键词: U.S.; Chile; Cooperative; Research; Reproductive

9600578 Kenagy This Americas Program award will support a collaborative research project between Dr. George Kenagy, University of Washington, Seattle, and Dr. Francisco Bozinovic, Pontificia Universidad Catolica de Chile. The objective of the proposed project is to characterize the profile of energy expenditure for breeding in the degu, a rodent belonging to a South American group, the Caviomorpha. This group undertakes a lengthy gestation leading to birth of highly precocial young requiring only a brief period of suckling. The study will seek to identify the peak demand and expenditure of energy and to see how these correspond to the maximal performance capacities of the selected species. Stable isotope technology will be used to measure rates of energy expenditure. An initial assessment will be made of the link between energetics and the mode of life history that has evolved in caviomorph rodents. Life history theory has produced the idea that for iteroparous animals an increase in current reproductive output should have a negative impact on future reproductive potential and survival. Evidence from genetic correlations and individual variation in performance continues to lend support to the possibility that energy relations are indeed a link between organismal performance and fitness. This study will address the role of energy in shaping life histories by providing insights into the process of energy use in a natural mammalian population and its relation to maximum energetic capacities of females during gestation or lactation. This will include the mammalian maternal strategy of producing precocial young. ***

小行星9600578 这个美洲计划奖将支持西雅图华盛顿大学的乔治·肯纳吉博士和智利天主教大学的弗朗西斯科·博齐诺维奇博士之间的合作研究项目。 拟议项目的目的是描述德古（一种属于南美洲豚鼠亚目的啮齿动物）繁殖的能量消耗概况。 这一组进行了漫长的妊娠，导致出生高度早熟的年轻人只需要一个短暂的哺乳期。 这项研究将设法查明能源的最高需求和消耗，并了解这些需求和消耗如何与选定物种的最大性能能力相对应。 稳定同位素技术将用于测量能源消耗率。 初步评估将作出能源和生活史的模式，已在caviomorph啮齿动物进化之间的联系。 生活史理论提出了这样一种观点，即对于iteroparous动物，当前生殖输出的增加应该对未来的生殖潜力和生存产生负面影响。 来自遗传相关性和个体表现差异的证据继续支持能量关系确实是有机体表现和健康之间的联系的可能性。 这项研究将解决能源在塑造生活史的作用，通过提供洞察自然哺乳动物种群的能量使用过程及其与妊娠或哺乳期女性最大能量能力的关系。 这将包括哺乳动物产生早熟幼仔的母性策略。 ***