Spatial, temporal and ecological correlates of morphological variation among North American freshwater fishes

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dc.contributor.advisor Pyron, Mark, 1960- Jacquemin, Stephen J. 2013-05-09T14:05:07Z 2013-05-09T14:05:07Z 2013-05-04 2013-05-04
dc.description.abstract This dissertation outlines the contribution of evolutionary and environmental factors on North American freshwater fish morphological variation. A more thorough understanding of the factors which result in morphological variation is essential to describing patterns of evolutionary diversification, distribution, ecological niche, ontogeny, sexual dimorphism, ecosystem role, community assembly, invasion dynamics, and conservation. This dissertation makes a unique contribution to understanding morphological diversity in freshwater fishes by linking intraspecific and interspecific variation to phylogeny, allometry, sex, habitat niche, geographic niche, hydrology, and long term environmental change. This dissertation is comprised of three chapters which detail large scale macroevolutionary patterns in morphological variation for North American freshwater fishes, long term morphological changes with hydrological alterations in Cyprinidae, and phenotypic plasticity of freshwater drum in the Wabash River. Overall, North American fishes tend to be deeper bodied and more robust with larger body size, in females, in low flow and lentic hydrological conditions, and in taxa with smaller geographic range that occupy more specialized habitat niches. Further, macroevolutionary analysis suggests that the majority of morphological diversification occurred relatively early on in the evolutionary history of North American fishes. en_US
dc.description.sponsorship Department of Biology
dc.description.tableofcontents Evolution of North American freshwater fish morphology with variation in habitat use and geographic range -- 100 years of hydrologic alterations and morphological variation in Cyprinidae -- Effects of allometry, sex and river location on morphological variation of freshwater drum Aplodinotus grunniens in the Wabash River, USA.
dc.subject.lcsh Freshwater fishes -- North America -- Morphology.
dc.subject.lcsh Cyprinidae -- North America -- Morphology.
dc.subject.lcsh Cyprinidae -- Effect of water levels on -- North America.
dc.subject.lcsh Freshwater drum -- Wabash River -- Morphology.
dc.title Spatial, temporal and ecological correlates of morphological variation among North American freshwater fishes en_US Thesis (Ph. D.) en_US

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  • Doctoral Dissertations [3248]
    Doctoral dissertations submitted to the Graduate School by Ball State University doctoral candidates in partial fulfillment of degree requirements.

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