Dissertation Research: Pattern vs Process: Evolution of the Rhinichthys osculus in Western North America

论文研究：模式与过程：北美西部犀鱼的进化

• 批准号: 9423146
• 负责人: Michael Douglas
• 金额: $ 0.8万
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-05-01 至 1996-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9423146&HistoricalAwards=false
• 关键词: Dissertation; Research; Pattern; vs; Process

9423146 DOUGLAS Large-scale geographic changes have occurred in western North America as a result of geologic upheaval and climate. These have spatially isolated western fishes to produce patterns of geographic variation within and between lineages. Congruence between pattern and process will be tested by using as a model organism a morphologically variable, widespread, western minnow (Rhinichthys osculus). Forty-five populations (50 individuals each) will be sampled from 10 different river systems (which form five different basins, each with known geological histories). Four other species will be used as comparisons for analyses. Seven individuals per population will be evaluated for genetic diversity by evaluating the DNA of their respective cellular mitochondria. Data will be evaluated using (a) traditional population genetic and geographic variation techniques, and (b) newer techniques which evaluate ancestor-descendant relationships among populations. Results from this study will provide a generalized model of geographic affinity between populations of a widely distributed fish species in western North America. This model can then be evaluated for congruence with other widespread (but less easily sampled) species of western fishes.

道格拉斯9423146 由于地质剧变和气候变化，北美西部发生了大规模的地理变化。 这些在空间上孤立的西方鱼类产生的地理变异的模式内和之间的谱系。 模式和过程之间的一致性将被测试作为一个模式生物的形态变量，广泛分布，西部小鱼（Rhinichthys osculus）。 将从10个不同的河流系统（形成五个不同的流域，每个流域都有已知的地质历史）中抽取45个种群（每个种群50个个体）。 其他4个种属将用作分析比较。 将通过评价每个群体中7个个体各自细胞线粒体的DNA来评价其遗传多样性。 将使用（a）传统的种群遗传和地理变异技术和（B）评价种群间祖先-后代关系的新技术对数据进行评价。 这项研究的结果将提供一个广泛分布在北美西部的鱼类种群之间的地理亲缘关系的广义模型。 然后，可以评估该模型与其他广泛分布（但不太容易采样）的西方鱼类物种的一致性。