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Evolution, Speciation, And Conservation Of Amblyopsid Cavefishes, Matthew Lance Niemiller
Evolution, Speciation, And Conservation Of Amblyopsid Cavefishes, Matthew Lance Niemiller
Doctoral Dissertations
Cave organisms are classic examples of regressive evolution, as many disparate taxa have evolved similar convergent phenotypes in subterranean environments. While recent phylogeographic and population genetic analyses have greatly improved our understanding of the evolutionary and biogeographic history of cave organisms, many questions remain unanswered or poorly investigated. I investigated several evolutionary and biogeographic questions in a model system for regressive evolution and studies of ecological and evolutionary mechanisms, amblyopsid cavefishes. In chapter I, I used recently developed methods to delimit species boundaries and relationships in a widely distributed cavefish, Typhlichthys. I show that species diversity in Typhlichthys is …
Phylogenetic Analysis Of Blacknose Dace (Rhinichthys) In West Virginia Streams, Samantha Taylor
Phylogenetic Analysis Of Blacknose Dace (Rhinichthys) In West Virginia Streams, Samantha Taylor
Theses, Dissertations and Capstones
Blacknose dace (Rhinichthys) are one of the most common cyprinid fishes in eastern North America. They also have been a topic of debate for over 30 years because morphology-based systematics has failed to clearly define their taxa. Taxonomists classify the complex into two species and one subspecies: the eastern form, R. atratulus atratulus; and the western form R. obtusus obtusus, and southern form R. obtusus meleagris. This research uses the mitochondrial cytochrome b gene and genomic RAG 2 gene in a phylogenetic analysis to help clarify species relations according to differences between each current species. Maps have been created to …