Dissertation Research: The Comparative Method: Examples from the Avian Genus Piranga and its Relatives

9321316约翰逊 本研究以鸟类皮兰加（tanagers）及其近缘种的羽毛形态、蛋白质电泳、线粒体DNA及形态学等资料，探讨其历史。 这些数据将允许生成的系统发育（系谱）假说，这将被用作研究的背景下，羽毛二型性（男性和女性有不同的羽毛颜色和图案），季节性迁移，和发声。 %%% 这项研究将证明羽毛二型性和各种生活史特征之间是否存在相关性，这些信息将用于检验鸟类羽毛二型性意义的假设。

9321316 Johnson This study examines the history of the avian genus Piranga (tanagers) and its relatives using a variety of kinds of data including plumage patterns, protein electrophoresis, mitochondrial DNA, and morphology. These data will allow generation of phylogenetic (genealogical) hypotheses for this group, which will be used as a backdrop for study of plumage dimorphism (males and females have different plumage colors and patterns), seasonal migration, and vocalizations. %%% The study will demonstrate whether correlations exist between plumage dimorphism and various life history traits, and this information will be used to test hypotheses about the significance of plumage dimorphism in birds.