Molecular Systematics of North American Cyprinid Fishes: Cyprinella lutrensis and the C. lutrensis Complex

拟议的研究将调查线粒体（mt） DNA分子在北美鲤科鱼（Cyprinella lutrensis）的地理样本之间的差异，以及在美国大陆属于C. lutrensis复合体或物种群的其他物种之间的差异。该研究主要是为了推断弓形虫和弓形虫复杂物种之间的系统发育或系谱关系。通过实现主要目标需要实现的目标包括(i)评估在德克萨斯州Trans-Pecos和其他地区是否存在隐种C. lutrensis复合体，以及（ii）评估导致C. lutrensis及其相关物种目前在美国大陆分布的生物地理事件。目标(i)对于美国特有或本土动物群的清查以及德克萨斯州和美国西南部正在进行的保护和保存本土生物的努力具有重要意义。目标（ii）最终将提供美国大陆中部和西南部地区在冰期前和冰期后发生的地质事件的假设。

The proposed research will investigate variation in mitochondrial (mt) DNA molecules among geographic samples of the North American cyprinid fish Cyprinella lutrensis an among other species belonging to the C. lutrensis complex or species-group in the continental United States. The research is designed primarily to infer hypotheses of phylogenetic or genealogical relationships within C. lutrensis and among C. lutrensis complex species. Goals to be realized by achievement of the primary objective include (i) an assessment of whether cryptic species within the C. lutrensis complex exist in the Trans-Pecos and other regions in Texas, and (ii) an assessment of the biogeographic events which led to the current distribution of C. lutrensis and related species in the continental United States. Goal (i) is of importance relative to the inventory of fauna endemic or native to the a United States and to ongoing attempts within Texas and the southwestern United States to protect and preserve native organisms. Goal (ii) will ultimately provide hypotheses of geological events which occurred in the central and southwestern regions of the continental United States during pre- and post-glacial times.