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DISSERTATION RESEARCH: Genetic Diversity and Population Structure of Ectoparasitic Lice Associated with Brood Parasitic Finches Viduidae and their Estrildid Finch Hosts.

论文研究：与巢寄生雀 Viduidae 及其寄主梅花雀相关的外寄生虱子的遗传多样性和种群结构。

基本信息

批准号：
0309249
负责人：
Michael Sorenson
金额：
$ 1.2万
依托单位：
Trustees of Boston University
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 2005-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0309249&HistoricalAwards=false
关键词：
DISSERTATION RESEARCH Genetic Diversity Population

项目摘要

Most birds have feather lice that are passed from parents to offspring, such that louse species are often restricted to particular hosts with which they share a long co-evolutionary history. The African indigobirds (genus Vidua) are host-specific brood parasites, reproducing only by laying eggs in the nests of certain estrildid finch host species. These parasitic birds and their hosts are members of two distinct families (Viduidae and Estrildidae) that diverged from a common ancestor millions of years ago, yet they have continue to have intimate contact in the host nest. This presents an excellent opportunity to examine evolutionary interactions between birds and parasitic lice. With support from the NSF Office of International Science and Engineering, this research will test whether indigobirds carry the lice of their respective host species, suggesting that associations between lice and birds are determined primarily by the ecology of louse transmission. If so, patterns of lice infestation may lend insight into the diversification of indigobirds, in which rapid speciation has apparently followed the colonization of new host species. On the other hand, if indigobirds and hosts each have their own unique lice, then associations between lice and birds may be constrained by the adaptation of lice to specific host lineages.

大多数鸟类都有从父母传给后代的羽虱，因此虱子物种往往局限于特定的宿主，它们与这些宿主有着长期的共同进化历史。非洲青鸟(Vidua属)是寄主特有的孵化寄生虫，只能在某些雀类寄主物种的巢中产卵繁殖。这些寄生鸟类和它们的宿主是两个截然不同的家族(Viduidae和Estrildidae)的成员，这两个家族在数百万年前从一个共同的祖先那里分离出来，但它们仍然在宿主巢中保持着密切的联系。这为研究鸟类和寄生虱之间的进化相互作用提供了一个极好的机会。在NSF国际科学与工程办公室的支持下，这项研究将测试青鸟是否携带各自宿主物种的虱子，这表明虱子和鸟类之间的联系主要由虱子传播的生态决定。如果是这样的话，虱子侵袭的模式可能会让我们深入了解板蓝鸟的多样性，在这种多样性中，物种的快速形成显然伴随着新宿主物种的殖民。另一方面，如果青鸟和宿主都有自己独特的虱子，那么虱子和鸟类之间的联系可能会受到虱子适应特定宿主谱系的限制。