Dissertation Research: Phylogeny and Diversification of Electric Organ Structure and Function in the Neotropical Hypopomid Fishes (Gymnotiformes: Teleostei)

这项研究结合了新热带区的系统发育研究， 电鱼科Hypopomidae（Gymnotiformes：Teleostei）， 电刺激与电刺激的比较研究 器官形态学 爆炸物处理，电器，配电和 从野外工作中收集的生态数据将被绘制到一个 系统发育假说 系谱假说 关系将从一个形态特征中构建 不包括电器官形态的数据集。 的应用 字符优化方法将允许历史序列， 爆炸物处理/电子器官系统的多样化， 鉴定 以下问题得到解决：（1）EOD是否 一些研究表明，物种“标记”，即什么是 EODs分类学价值以及EODs在一个物种中的变异程度？ (2)是系统发育距离或社区协会更好 爆炸物处理分歧的预测因素 (3)是结构复杂的EOD， 辅助电器官原始或衍生，以及有多少次 他们出现了吗？ (4)特定的爆炸物处理特征是否始终一致 与特定的电器官形态有关吗 (5)是 特定的爆炸物处理/电子器官特征始终与 特别生境/水的特性？

This research combines phylogenetic study of the Neotropical electric fish family Hypopomidae (Gymnotiformes: Teleostei) with comparative study of electric organ discharge (EOD) and electric organ morphology. EOD, electric organ, distributional and ecological data, collected from field work will be mapped onto a phylogenetic hypothesis. The hypothesis of genealogical relationships will be constructed from a morphological character data set excluding electric organ morphology. Application of character optimization methods will allow historical sequences in the diversification of the EOD/electric organ system to be identified. The following questions are addressed: (1) Are EODs species "markers" as some research suggest, i.e. what is the taxonomic value of EODs and how variable are EODs within a species? (2) Is phylogenetic distance or community association a better predictor of EOD divergence? (3) Are complexly structured EODs and accessory electric organs primitive or derived, and how many times have they arisen? (4) Are particular EOD features consistently associated with particular electric organ morphologies? (5) Are particular EOD/electric organ features consistently associated with particular habitats/water characteristics?