Dissertation Research: An Examination of Variations on the Theme of Livebearing

论文研究：对生命主题变化的考察

• 批准号: 0710185
• 负责人: David Reznick
• 金额: $ 1.14万
• 依托单位: University of California-Riverside
• 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: 2007-06-15 至 2010-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0710185&HistoricalAwards=false
• 关键词: Dissertation; Research; Examination; Variations; Theme

The fish family Poeciliidae includes one species that lays eggs and approximately 200 that bear live young. The livebearers include many species with placentas, a trait commonly thought to exist only in mammals. Placental reproduction is a type of matrotrophy (mother feeding), or post-fertilization maternal provisioning. It has evolved multiple times in a diversity of organisms. Despite its many origins and apparent importance as a life history trait, there is no explanation for what shaped its evolution. The diversity in the Poeciliidae facilitates the study of factors that shape different modes of maternal provisioning. The proposed research includes laboratory, field, and data-mining techniques to examine several hypotheses for the evolution of matrotrophy and reproductive allocation. This work represents the first experimental test of predictions derived from the only theoretical model for the evolution of matrotrophy, examines several ad-hoc hypotheses, and has the potential to generate new, testable, hypotheses. It will facilitate broader studies on the evolution of matrotrophy. It includes collaborations with the theoreticians that developed this model, so that empirical research can inform and modify the current model and make it more biologically realistic. Numerous undergraduates will participate in this research.

鱼家族的poeciliidae包括一种产卵的物种，约有200种卵子活着。 活人包括许多带有胎盘的物种，这是一种通常仅在哺乳动物中存在的特征。 胎盘繁殖是一种基因营养（母亲喂养）或育后母体供应。 它在多种生物体中多次进化。 尽管其起源有许多起源，并且显然是生活史特征，但没有解释其塑造其发展的原因。 Poeciliidae的多样性促进了塑造不同孕产妇供应模式的因素的研究。 拟议的研究包括实验室，现场和数据挖掘技术，以检查基因营养和生殖分配进化的几种假设。这项工作代表了从唯一的生物营养发展的理论模型得出的预测的实验测试，研究了几个临时假设，并具有产生新的，可检验的，可检验的假设的潜力。 它将促进有关基因营养进化的更广泛研究。它包括与开发该模型的理论家的合作，以便实证研究可以为当前的模型提供信息，并使其在生物学上更现实。 许多本科生将参加这项研究。