Control of Reproductive Function in Diverse Habitats

不同栖息地生殖功能的控制

• 批准号: 0317141
• 负责人: John Wingfield
• 金额: $ 60万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-09-15 至 2007-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0317141&HistoricalAwards=false
• 关键词: Control; Reproductive; Function; Diverse; Habitats

This proposal will investigate the environmental control of breeding in populations of "crowned sparrows" of the genus Zonotrichia. Key populations have been identified in Arctic, mid-latitudes and equatorial regions that express the full spectrum of extreme inflexibility of timing (Arctic) to varying degrees of flexibility and asynchrony at mid-latitudes and equatorial regions. Field experiments will determine how flexible breeding seasons are within each habitat. Particular emphasis will be placed on how social interactions within and between sexes contribute to the synchronization and temporal organization of the breeding cycle. Parallel laboratory experiments will explore further how environmental signals such as change in day length, temperature, food and water interact with social cues to regulate neuroendocrine and endocrine secretions that orchestrate reproductive function. Of particular importance are investigations of novel peptides in the hypothalamus that may provide pathways for these environmental signals. The results will have practical applications for how vertebrates may respond to global change in the near future, and will provide unique insight on how environmental control mechanisms evolved. Some populations may be able to adjust, whereas others may not, possibly indicating where future conservation efforts should be focused. The project will provide a framework for education at undergraduate and graduate levels, as well as for outreach to an ongoing project with a local high school.

本计画将探讨环毛属冠雀族群繁殖之环境控制。 在北极、中纬度和赤道地区确定了关键种群，它们表现出全方位的极端时间适应性（北极），在中纬度和赤道地区表现出不同程度的灵活性和适应性。实地实验将确定每个栖息地的繁殖季节有多灵活。特别强调的是如何在性别内和性别之间的社会互动有助于繁殖周期的同步和时间组织。平行实验室实验将进一步探索环境信号，如白天长度，温度，食物和水的变化如何与社会线索相互作用，以调节神经内分泌和内分泌分泌，协调生殖功能。特别重要的是研究下丘脑中的新肽，可能为这些环境信号提供途径。这些结果将在不久的将来对脊椎动物如何应对全球变化产生实际应用，并将为环境控制机制如何进化提供独特的见解。一些种群可能能够适应，而另一些则可能无法适应，这可能表明未来的保护工作应该集中在哪里。该项目将提供一个本科和研究生教育框架，以及与当地一所高中正在进行的项目的外联。