Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 139 for “"salamanders"”.
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Some helminths from salamanders of California
<p>Studies on the helminth parasites of salamanders from California have been very limited.</p><p>Between September 1975 and April 1977, 340 salamander belonging to seven species, Aneides flavipunctatus (7), A. lugubris (7), Batrachoceps attenuatus attenuatus (250), Ensatina eschscholtzii …
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Complex evolution of mitochondrial genomes: lessons from salamanders
… genomes in vertebrates, focusing on salamanders as an exemplar clade. Chapter One analyzes mitochondrial genome sequences of vertebrate lineages that differ in metabolic rates. Salamanders, which have the lowest metabolic requirements among tetrapods, experience weaker purifying …
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The role of red-backed salamanders in ecosystems
… two experiments to test the role of red-backed salamanders (Plethodon cinereus) in forested ecosystems. I examined the effects of salamanders on five 314-m² plots with reduced salamanders and five reference plots. I found no evidence that salamanders affected litter or wood decomposition …
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Food Habits of Larval Ringed Salamanders, Ambystoma Annulatum
Larval Ambystoma annulatum were collected from two ponds in Stone County, Missouri during 1989-1990 for a food habits study. Larvae fed on a variety of organisms. The major food items consisted of microcrustaceans, nematodes, and dipteran larvae. The diet changed both with development and season. …
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The influence of silvicultural manipulations on plethodontid salamanders
… on how methods of forest management impact salamanders. In this research, I examine how experimental silviculture impacts plethodontid salamander relative abundance and count, and I compare three different body condition indices. Chapter 1 focuses on plethodontid salamander relative …
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The Distributional Ecology of Three Uncommon Salamanders in Iowa
"Ambystoma texanum", "A. laterale", and "Notophthalmus viridescens louisianensis" were studied in Iowa from the fall 1982 through summer 1984. They were found not to differ morphologically from other members of their taxa elsewhere. Significant ontongenetic and slight clinal variation were observed …
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A study of nematode parasites of some California salamanders
… available concerning the nematode parasites of salamanders in California. Lehmann (1954) reported the finding of Oxyuris dubia Leidy 1856, in the rectum of 33 Ensatine e. Eschscholtzii from Sonoma County, California, and in 3 of 10 Batrachoseps a. Attenuatus, from San Francisco County, …
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Incorporating microclimate into habitat suitability analysis for plethodonitd salamanders
… at relevant biological scales to plethodontid salamanders in Great Smoky Mountains National Park. Understory vegetation structure was found to be an important addition to canopy cover in buffering near-surface temperatures and improved accuracy of microclimatic temperature estimates. The …
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Effects of Urbanization on Stress Response of Texas Eurycea salamanders
No abstract prepared.
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Natural History and Conservation of Bolitoglossine Salamanders in Central Panama
<p>I conducted a mark-recapture study to assess the natural history of a Neotropical salamander community in three discrete 4–6 week sampling periods at Chorro Las Yayas, a protected natural area of about 8000 m2 in central Panama, during an extended drought. I captured 87 Bolitoglossa biseriata, …
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Stealing, scavenging, or storing? Breeding behaviors of unisexual Ambystoma salamanders
… salamander complex is a lineage of all-female salamanders that use a unique form of reproduction: kleptogenesis. Kleptogenesis requires sperm from male salamanders of co-occurring sexual species, potentially putting unisexual and sexual females in breeding competition. We investigated if …
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Salamanders and Science: Place-based Environmental Education in Rural Appalachia
The opportunity to learn science by doing authentic science in a rural community is not a common occurrence, yet for over thirty years, a group of dedicated educators have provided the experience of learning field biology and ecology to students in a geographically isolated area of the Appalachian …
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Honest Signaling in Aggressive Contests Between Ozark Zigzag Salamanders (Plethodon Angusticlavius)
… occurs in territorial contests in terrestrial salamanders, is an honest indicator of aggressive intent. In staged contests between pairs of Ozark zigzag salamanders (Plethodon angusticlavius), individuals that performed bites spent more time exhibiting ATR prior to biting than individuals that …
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Response Of Salamanders To Chemical Stimuli From Predators In Natural Habitats
… Very few studies have tested response of salamanders to chemical stimuli (Kairomones) from predators under natural conditions. I used field experiments to test: (1) responses of stream-dwelling neotenic graybelly salamanders, Eurycea multiplicata griseogaster, to chemical stimuli from …
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Reproductive Patterns of Three Plethodon Salamanders Endemic to the Ouachita Mountains
Monthly collections of Plethodon caddoensis, the Caddo Mountain salamander, Plethodon ouachitate, the Rich Mountain salamander and Plethodon fourchensis, the Fourche Mountain salamander were made in 1985 and 1986. Reproductive patterns, fecundity and length-weight relationships were examined. When …
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Salamanders of the Mio-Pliocene Gray Fossil Site, Washington County, Tennessee.
<p>Screening efforts at the Gray Fossil Site, Washington County, Tennessee, have yielded a unique and diverse salamander fauna for the southern Appalachian Mio-Pliocene; including at least five taxa from three modern families (Ambystomatidae, Plethodontidae, and Salamandridae) supporting the …
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Learning of Dietary Cues By Embryos and Larvae of Ringed Salamanders (Ambystoma Annulatum)
… I tested the hypothesis that larval ringed salamanders (Ambystoma annulatum) exposed to a novel food scent as embryos will exhibit a preference for the scent post-hatching. Embryos were exposed to brine shrimp or a water control. After hatching, behavior of larvae was quantified following …
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Variation in Behavior of Different Populations and Sex Classes of Paedomorphic Oklahoma Salamanders
… as temperature. I examined paedomorphic Oklahoma salamanders (Eurycea tynerensis) from two spatially segregated populations in Missouri and Oklahoma to determine whether antipredator behavior, swimming speed, activity, and proximity to cover were influenced by sex, reproductive condition, or …
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Scale dependent genetic structure of Idaho Giant salamanders (Dicamptodon aterrimus) in stream networks
Stream network structure constrains population processes of freshwater organisms, with individual, population and community level consequences. This consistent structure provides a framework in which examination of life-history influences on population genetic structure may provide general insight. …
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