DISSERTATION RESEARCH: Tactic Switching, Habitat Selection, and Evolution of Alternative Mating Tactics
论文研究:策略转换、栖息地选择和替代交配策略的演变
基本信息
- 批准号:0309426
- 负责人:
- 金额:$ 0.73万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2003
- 资助国家:美国
- 起止时间:2003-07-01 至 2004-06-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Tactic switching, habitat selection, and evolution of alternative mating tactics.Gregory F. Grether and Brenda LarisonHow variation is maintained in natural populations is a fundamental evolutionary question. Among the causes of variation, sexual selection plays a prominent role, leading to exaggerated traits, alternative mating tactics, and even speciation. Numerous studies have examined alternative mating tactics in species in which individuals exhibit distinct differences in traits such as size or color, and individuals use one tactic for life. However, most species exhibit continuous variation in such traits, and individuals exhibit flexible use of alternative tactics. An important question is how alternative mating tactics evolve under these conditions. Besides exhibiting continuous variation in tactic use and physical attributes, individuals of many species have the capability of choosing the habitats they utilize. Where different habitats promote differences in tactic use, this may further influence the evolution of alternative mating tactics.The proposed study will investigate whether tactic switching and habitat selection have promoted the evolution and maintenance of alternative tactics in a damselfly in which tactic use is associated with continuous variation in shape. This hypothesis predicts that, 1) tactic use and fitness should vary in response to environment and shape, and 2) males should select environments based on their shape. Predictions will be tested through observations, enclosure experiments, examination of energetic costs, and development of a dynamic state model. This project provides opportunities for undergraduate research for both U.S. students and local Panamanian students.
策略转换,栖息地选择,和替代交配策略的进化。如何在自然种群中保持变异是一个基本的进化问题。在变异的原因中,性选择起着突出的作用,导致夸大的特征,替代交配策略,甚至物种形成。许多研究已经研究了物种中的替代交配策略,其中个体在大小或颜色等性状上表现出明显的差异,并且个体使用一种策略生活。然而,大多数物种在这些性状上表现出连续的变化,个体表现出灵活的替代策略。一个重要的问题是,在这些条件下,替代性交配策略是如何演变的。除了在策略使用和物理属性上表现出持续的变化外,许多物种的个体还具有选择它们所利用的栖息地的能力。在不同的栖息地促进策略使用的差异,这可能会进一步影响替代mating tactics.The拟议的研究将探讨是否策略转换和栖息地的选择,促进了替代策略的进化和维护,在一个豆娘的策略使用与形状的连续变化。这一假说预测,1)策略的使用和适应性应该随着环境和形状的变化而变化,2)男性应该根据他们的形状选择环境。预测将通过观测、封闭实验、能量成本检查和动态模型的开发进行测试。该项目为美国学生和当地巴拿马学生提供本科研究的机会。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Gregory Grether其他文献
Gregory Grether的其他文献
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