US-Sweden Cooperative Science: Origin of Polygyny in a Polyterritorial System

美国-瑞典合作科学：多领土制度中一夫多妻制的起源

• 批准号: 8921151
• 负责人: William Searcy
• 金额: $ 1.07万
• 依托单位: University of Pittsburgh
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-04-01 至 1991-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8921151&HistoricalAwards=false
• 关键词: US; Sweden; Cooperative; Science; Origin

This award will support collaborative research in avian behavioral ecology between Dr. William Searcy, University of Pittsburgh and Dr. Arne Lundberg, Department of Zoology, Uppsala University, Sweden. The objective of the proposed research is the collection and analysis of critical field data on the well-studied polyterritorial and polygynous pied flycatcher. The investigators propose to examine the adaptive basis of polygyny in this species, in which polygyny is closely associated with the defense of multiple territories by single males (polyterritoriality). Female pied flycatchers pay a fitness cost if they choose an already-mated male, and they are not compensated for this cost by receiving a better territory or mate. One current hypothesis on why females nevertheless do mate polygynously is that the polyterritorial system allows males to deceive females about their mating status. A second hypothesis is that females choose mated males despite being aware of the male's true mating status, because of the high cost of continuing to search for an unmated male. The investigators plan to test the first hypothesis by determining whether there are reliable differences in behavior between mated and unmated males during periods when unmated females are observing them. If such differences exist, females ought to be able to determine male mating status. The second hypothesis will be tested by determining whether females that ultimately settle with mated males have previously encountered unmated males. Both tests will be performed by following the mate search of individually marked females forced to search for new mates by the removal of their previous mate and nestbox. The project will benefit from the combined experimental expertise of Dr. Searcy and Dr. Lundberg's record of productive field work with this species. The results of this research will make an important contribution to the field of behavioral ecology.

该奖项将支持匹兹堡大学威廉·塞西（William Searcy）博士和瑞典乌普萨拉大学动物学系的阿恩·伦德伯格（Arne Lundberg）博士之间的合作研究。 拟议的研究的目的是收集和分析有关精心研究的多个阶级和多摩型捕蝇器的关键现场数据。 研究人员建议在该物种中检查一夫多妻制的适应性基础，其中一夫多妻制与单个男性（多层地面）对多个领土的辩护密切相关。 如果女性捕蝇器选择已经交配的男性，则可以通过获得更好的领土或伴侣来弥补这一费用，因此支付了健身费用。 当前关于女性为什么要一夫多妻制作女性的一个假设是，多属性系统允许男性欺骗女性的交配状态。 第二个假设是，尽管女性意识到了男性的真正交配状况，但女性选择了男性，因为继续寻找未成熟的男性的成本很高。 研究人员计划通过确定在未表现的女性观察它们的时期，交配男性和未表现的男性之间是否存在可靠的行为差异来检验第一个假设。 如果存在这种差异，则女性应该能够确定男性交配状况。 第二个假设将通过确定最终与男性定居的女性是否以前遇到了未表现的男性。 这两种测试将通过遵循伴侣搜索被迫通过去除以前的伴侣和巢箱来搜索新伴侣的伴侣搜索。该项目将受益于Searcy博士和Lundberg博士与该物种的生产现场工作记录的共同实验专业知识。 这项研究的结果将为行为生态学领域做出重要贡献。