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City University of New York (CUNY)
Chromosomes; cytochrome b; fish morphology; freshwater fish; mtDNA; speciation
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Full-Text Articles in Molecular Biology
Incipient Speciation In Freshwater Fish Species From Two Isolated Watersheds, Paula Gore Miller
Incipient Speciation In Freshwater Fish Species From Two Isolated Watersheds, Paula Gore Miller
Dissertations, Theses, and Capstone Projects
The process of speciation occurs as a result of restricted gene flow between segments of an interbreeding population occupying different geographic areas. This separation may result in isolated populations which undergo genetic and phenotypic changes. The Wisconsin glacial period, which ended approximately 17,500 years ago, dramatically altered the geography of North America. The glacier covered almost the entire North America as it advanced. Areas that were not covered with ice provided suitable habitats (refugia) for relict species that were previously widespread in the northern section of the continent. As the ice sheet retreated, animals and plants were able to return …