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You've searched: ETD

  • All fields: Integrative
(19 results)



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    • Density Effects on Growth, Survival and Diet of June sucker (Chasmistes liorus): A Component Allee Effect in an Endangered Species.
    • Gonzalez, David Barrett 1977-
    • Density-dependence is considered one of the most important regulators of population growth, and it has been documented across a wide variety of species. Typically, population growth rate and components thereof decline with increasing density...


    • Phylogeographic Analyses of Obligate and Facultative Cave Crayfish Species on the Cumberland Plateau of the Southern Appalachians
    • Buhay, Jennifer Elizabeth 1975-
    • Cave systems and their unique biota are widely viewed as highly endangered, yet very little is known about basic life history, ecology, distributions, habitat requirements, and evolutionary relationships of subterranean species. The crux of the...


    • Biogeography and Evolution of Neotropical Small Mammals, with Emphasis on Hystricognath Spiny Rats of the Genus Proechimys (Family Echimyidae)
    • Leite, Rafael do Nascimento
    • The Neotropical region is the most biologically diverse region on the planet. The region encompasses a variety of ecosystems and has long been the target of researchers interested in patterns of species diversity and distribution. More recently,...


    • Evolution and phylogeny of basal winged insects with emphasis on mayflies (Ephemeroptera)
    • Ogden, Thomas H 1973-
    • Ephemeroptera (mayflies) is a monophyletic group of semi-aquatic pterygote insects, comprising 3083 species, 376 genera, and 37 described families and are present on all continents, excluding Antarctica, being associated with freshwater and...


    • Epidemiology of Ustilago bullata Berk. on Bromus tectorum L. and Implication for Biological Control
    • Boguena, Toupta 1965-
    • The seedling-infecting pathogen Ustilago bullata Berk. is a naturally occurring biological control agent for cheatgrass (Bromus tectorum L.). The effects of temperature and nutrients on pathogen teliospore germination behavior and the effects of...


    • Fresh Water Ecology Unit for Secondary Education Science Courses
    • Hyer, Eric L 1960-
    • Science means “to knowâ€, a process for gaining knowledge and an understanding of the natural world. Students need to be involved in active learning. In other words, they must do science, not just hear about it. Good science encourages...


    • Phylogeny and Biogeography of Ice Crawlers (Insecta: Grylloblattodea): Evidence from Six Molecular Loci
    • Jarvis, Karl J 1978-
    • Ice crawlers (Insecta: Grylloblattodea) are rarely encountered insects that consist of five genera representing 26 species from North America and Asia. Asian grylloblattids are the most diverse, but North American ice crawlers (genus Grylloblatta)...


    • Phylogenetic relationship of forest spiny pocket mice (Genus Heteromys) inferred from mitochondrial and nuclear markers with implications for species boundaries
    • Gonzalez, Malinda Wallentine 1978-
    • I constructed a best estimate phylogeny based on congruence of multiple data sources. In recent years molecular data has been used both to construct phylogenies of taxonomic groups and to aid in the delimitation of new species. I generated and...


    • Digestibility, Nitrogen Balance, and Blood Metabolites in Llama and Alpaca Fed Barley and Barley Alfalfa Forages.
    • Davies, Heather Loree 1978-
    • These projects were conducted to determine the digestibility of forage diets with differing CP levels in llamas and alpacas. The Utah study was designed to compare llama and alpaca nutritional parameters to determine if nutritional recommendations...


    • Evolution in Neotropical Herpetofauna: Species Boundaries in High Andean Frogs and Evolutionary Genetics in the Lava Lizard Genus Microlophus (Squamata: tropiduridae): A History of Colonization and Dispersal
    • Benavides, Edgar 1971-
    • In this collection of papers I have summarized my investigations into the field of evolutionary genetics and more specifically into patterns of biodiversity and evolutionary processes. The lizards (and frogs) studied here share common features in...


    • Phylogeny of the Polyneopterous Insects With Emphasis on Plecoptera: Molecular and Morpological Evidence
    • Terry, Matthew Dana 1971-
    • Polyneoptera is an assemblage of eleven insect orders comprising the “orthopteroid” insects. It includes familiar insects such as grasshoppers, roaches, termites, earwigs and preying mantises; as well as the more obscure web-spinners,...


    • Phylogenetic History, Morphological Parallelism, and Speciation in a Complex of Appalachian Salamanders (Genus: Desmognathus)
    • Jackson, Nathan D 1976-
    • Understanding the mechanisms that generate shared morphologies across closely related taxa is important when identifying distinct evolutionary lineages using morphological characters. Desmognathus salamanders are an ideal group for testing...


    • Vegetation response of a Wyoming big sagebrush (Artemisia tridentata ssp. wyomingensis) community to 6 mechanical treatments in Rich County, Utah
    • Summers, Daniel David 1976-
    • In recent years, the importance of sagebrush to shrub-steppe ecosystems and associated plant and animal species has been recognized. The historical removal of herbaceous species by excessive and uncontrolled livestock grazing on many of our...


    • The Dogma of the 30 Meter Riparian Buffer: The Case of the Boreal Toad (Bufo boreas boreas)
    • Goates, Michael Calvin 1978-
    • We tested the adequacy of standard 30 m riparian buffers for semi-aquatic vertebrate species, using the boreal toad (Bufo boreas boreas) as an example. We monitored toad populations in south-central Utah using radio telemetry during the summers of...


    • Phylogenetic Systematics and Evolution within the Family Scincidae
    • Whiting, Alison Swindle 1974-
    • Scincidae (skinks) comprise one of the largest families of lizards, and the more than 1300 species show great variation in body size and form, and are found worldwide in a diversity of habitats. The group presents many interesting questions...


    • Delimitating Species Boundaries within the Liomys Pictus- Spectabilis Complex (Rodentia: Heteromyidae)
    • Vance, Victoria L 1979-
    • Previous studies based on morphological, allozymic and mitochondrial sequence data have indicated that Liomys pictus is paraplyletic relative to L. spectabilis. The purpose of this study was to determine the species boundaries that exist within...


    • Distribution of chemistry and sexual fecundity in the lichenized-fungi, Xanthoparmelia cumberlandia and Xanthoparmelia coloradoensis on Boulder Mountain, Aquarius Plateau, UT
    • Jackson, Heather Bird 1978-
    • Three aspects of Xanthoparmelia cumberlandia and Xanthoparmelia coloradoënsis populations found at two elevations are explored: clustering of secondary chemicals and the resulting implications for taxonomic distinctions, the usefulness of thallus...


    • Genetic Considerations for the Conservation and Management of Yellowstone Cutthroat Trout (Oncorhynchus clarkii bouvieri) in Yellowstone National Park
    • Janetski, David J 1980-
    • A key component to conservation is an accurate understanding of genetic subdivision within a species. Despite their ecological and economic importance, relatively little is understood about the genetic structuring of Yellowstone cutthroat trout in...


    • Prevalence of Teleological and Lamarckian Misconceptions of Natural Selection Among College Students
    • Battisti, Bryce T
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