International Res Fellowship Prg: Polymorphism in an Elec Communication Channel:Investigations of Assortative Mating, Heritability, and Environmental Effects on Signal Development

国际研究奖学金项目：电子通讯渠道中的多态性：选型交配、遗传力和环境对信号发展的影响的调查

• 批准号: 0502341
• 负责人: Matthew Arnegard
• 金额: --
• 依托单位: Arnegard Matthew E
• 依托单位国家: 美国
• 项目类别: Fellowship
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-03-01 至 2008-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0502341&HistoricalAwards=false
• 关键词: International; Res; Fellowship; Prg; Polymorphism

0502341ArnegardThe International Research Fellowship Program enables U.S. scientists and engineers to conduct three to twenty-four months of research abroad. The program's awards provide opportunities for joint research, and the use of unique or complementary facilities, expertise and experimental conditions abroad.This award will support a twenty-two-month research fellowship by Dr. Matthew E. Arnegard to work with Dr. Dolph Schluter at the University of British Columbia in Vancouver, Canada.Discrete variation in a communication channel can serve as a model in which to study evolutionary mechanisms underlying diversification in animal communication. When polymorphic signals in a focal organism are used for mate recognition in closely related species, an early stage of speciation or a polymorphic stage preceding it is suggested for the focal taxon. Such a system may exist within the Brienomyrus species flock of electric fishes from Central Africa. Some two dozen 'good' Brienomyrus species are known, each of which exhibits a stereotyped electric organ discharge (EOD). Nested within this group is the magnostipes complex consisting of pairs of morphs which are indistinguishable in appearance but emit distinct EODs. The TYPE I morph of this complex co-occurs with either TYPE II or TYPE III depending on locality. One of the goals of this project is to test whether TYPE I and TYPE II mate assortatively in laboratory streams. In parallel with this study, the PI will indirectly test for assortative mating by artificially creating hybrids and examining whether their EODs differ from TYPEs I and II. He will also estimate the fitness of hybrids relative to offspring derived from crosses within each signal type, and will experimentally test environmental effects on EOD development and expression. Finally, he will exploit the territorial nature of these fish to study behavioral thresholds of EOD discrimination using playback experiments. The outcomes of this study will make important steps toward better understanding of the influences responsible for electric signal diversification in this system.Dolph Schluter's laboratory is the ideal place to pursue these studies. Dr. Schluter has extensively studied assortative mating, phenotypic inheritance, and mating incompatibilities in stickleback fishes. His aquatic facilities will provide resources suitable for breeding experiments under semi-natural conditions and for rearing electric fish from eggs to adults. First-hand comparison of patterns of mate choice and trait inheritance known for sticklebacks to those found in the magnostipes complex will greatly benefit the interpretation results.

[0502341 . arnegard]国际研究奖学金计划使美国科学家和工程师能够在国外进行3至24个月的研究。该计划的奖励为联合研究提供了机会，并利用独特或互补的设施、专业知识和国外的实验条件。该奖项将支持Matthew E. Arnegard博士与加拿大温哥华英属哥伦比亚大学的Dolph Schluter博士进行为期22个月的研究。交流渠道的离散变异可以作为研究动物交流多样化背后的进化机制的模型。当一个焦点生物的多态信号被用于近亲物种的配偶识别时，在物种形成的早期阶段或在此之前的多态阶段被认为是焦点分类单元。这样的系统可能存在于中非的Brienomyrus物种群中。已知约有24种“好”的Brienomyrus物种，每一种都表现出刻板的电器官放电（EOD）。嵌套在这一组的是由对变形组成的magnnostipes复合体，这些变形在外观上无法区分，但发出不同的eod。该复合体的I型形态与II型或III型共同发生，取决于地点。该项目的目标之一是测试I型和II型是否在实验室流中匹配交配。与本研究同时进行的是，PI将通过人工创造杂交种，并检查它们的eod是否与I型和II型不同，来间接测试同型交配。他还将估计每种信号类型的杂交后代的适合度，并将实验测试环境对EOD发育和表达的影响。最后，他将利用这些鱼的领土性质，利用回放实验来研究EOD歧视的行为阈值。这项研究的结果将为更好地理解该系统中电信号多样化的影响迈出重要的一步。多尔夫·施吕特的实验室是进行这些研究的理想场所。Schluter博士广泛研究了棘鱼的分类交配、表型遗传和交配不相容。他的水产设施将为半自然条件下的养殖实验和电鱼从卵到成鱼的养殖提供资源。将棘鱼的配偶选择模式和性状遗传模式与magnnostipes复合体中的模式进行第一手比较，将大大有利于解释结果。