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 23 for “"rattlesnakes"”.
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Radiotelemetry and Behavioral Ecology of Neonate Southern Pacific Rattlesnakes
… surface of seven neonate Southern Pacific Rattlesnakes, <em>Crotalus oreganus helleri,</em> I monitored the behavior and ecology of this understudied age-class and species. As an alternative to surgical implantation, external transmitter attachment was less invasive, permitted frequent …
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Stress Ecology of the Pacific Rattlesnakes (Crotalus oreganus and Crotalus helleri)
… in a group of captive Northern Pacific rattlesnakes (<em>Crotalus oreganus</em>). Venom protein concentration and plasma CORT levels were compared before and after two weeks of unpredictable bouts of cage vibration, and to a non-vibrated control group. CORT levels were also assessed one …
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Comparative Biology of Sympatric Red Diamond and Southern Pacific Rattlesnakes in Southern California
<p>I compared the biology of two sympatric rattlesnakes within the context of resource use and niche partitioning. Using radio-telemetry and mark-recapture involving passive integrated transponders (PIT) tags, I studied Red Diamond (Crotalus ruber) and Southern Pacific (C. oreganus helleri) …
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The Behavioral and Physiological Effects of Long-Distance Translocation on Western Rattlesnakes (Crotalus oreganus)
… we conducted an experimental LDT on Western Rattlesnakes (<em>Crotalus oreganus</em>) on Vandenberg Air Force base in California.</p> <p>Fourteen snakes were monitored, beginning in mid July 2012 and ending in early September. Each was implanted with a radio transmitter and iButton …
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Effects of Supplemental Hydration on Physiology and Behavior of Northern Pacific Rattlesnakes (Crotalus oreganus oreganus)
… and behavioral parameters in Northern Pacific rattlesnakes (<em>Crotalus oreganus oreganus</em>) by experimentally manipulating hydration levels in the field. Two treatment groups were created: one of these received supplemental hydration twice a month from May to September (hydrated) while the …
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Geographic and Ontogenetic Variation of Venom in the Rattlesnakes Crotalus oreganus oreganus and Crotalus o. helleri
… oreganus) and Southern Pacific (C. o. helleri) rattlesnakes, with special emphasis on geographic variation across the species’ California range. In the first of three empirical studies, I used reversed-phase liquid chromatography and mass spectrometry to examine the venome of four C. o. helleri …
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Factors Influencing Venom Expenditure During Defensive Bites by Cottonmouths (AGKISTRODON PISCIVORUS) and Rattlesnakes (CROTALUS VIRIDIS, CROTALUS ATROX)
… during bites. Recent studies have shown that rattlesnakes appear capable of selectively allocating their venom reserves during predatory strikes, metering more venom into certain prey types and less into others. Despite much speculation, the quantities of venom expended during defensive bites …
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Physiological and behavioral consequences of reptilian life in the slow lane: Ecology of beaded lizards and rattlesnakes.
… to approximately 1.4 times its body mass. Rattlesnakes had a mean home range size of 4.6 hectares and traveled, on average, 12.4 km over approximately 95 hours of annual surface activity. Rattlesnakes spent considerable time inactive on the surface, whereas Heloderma spent the vast majority …
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Movement and Life History Aspects of the Pygmy Rattlesnake in Southwest Missouri
Individual pygmy rattlesnakes (Sistrurus miliarius) (N=7) were monitored with radiotelemetry in Christian and Taney Counties of southwest Missouri. Snakes were tracked for periods of 11-73 days and a total of 264 tracking days. Males exhibited significantly greater (P ﹥ 0.05) movement than females …
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The Role of Temperature in Habitat Selection by Eastern Massasauga Rattlesnakes (Sistrurus Catenatus Catenatus) Near Their Northern Range Limit
… in habitat selection by eastern massasauga rattlesnakes (Sistrurus c. catenatus ) on the Bruce Peninsula, Ontario, near their northern range limit. Snakes were selective at the microhabitat scale, preferentially using locations with closer retreat sites and shrubs than random. Gravid females …
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Optimizing pharmacodynamics and evaluating echocardiographic effects of alfaxalone sedation in bearded dragons (Pogona vitticeps) and prairie rattlesnakes (Crotalus viridis)
… require sedation for procedures. Prairie rattlesnakes (Crotalus viridis) act as a model for that species and other Viperidae housed in zoological institutions or studied in free-ranging populations that require sedation to facilitate safe handling, examination, and minimally invasive …
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Effects of Wildfires on Rattlesnake (Crotalus Oreganus) Growth and Movement in Washington State
… its effects on local predators. Northern Pacific rattlesnakes (<em>Crotalus oreganus</em>) comprise an excellent model to investigate how fire may influence wildlife because they are important predators that contribute to controlling prey populations, but are also unable to readily escape from …
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Venom Expenditure by Viperid and Elapid Snakes: Mechanisms, Adaptation, and Application
… In the third experiment, I examined whether rattlesnakes expend optimal quantities of venom when feeding on rodent prey. The results supported my prediction that the quantity of venom rattlesnakes typically inject into mice produces the most rapid incapacitation and death for the least amount …
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The Dynamics of Human and Rattlesnake Conflict in Southern California
<p>Human-rattlesnake conflict occurs when rattlesnakes are discovered in human-dominated areas and are deemed to pose an unacceptable risk to humans because of their venomous bite. In this dissertation, I investigated the nature of this conflict from the perspectives of both the behavioral and …
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Distribution, Habitat Analysis, and Conservation of the Timber Rattlesnake in Virginia
… females for gestation, and by other timber rattlesnakes for shedding, mating, and digesting. Understanding the range of the timber rattlesnake in Virginia will enable biologists and land managers to better manage the landscape in a way conducive to the survival and persistence of timber …
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Behavioral Ecology and Associated Virology of Mosquito-Host Interactions in Southern California
… serum antigenantibody tests were negative in rattlesnakes (genus Crotalus) for West Nile virus and western equine encephalitis, but positive for a flavivirus presumed to be St. Louis encephalitis in 10% of the 40 sampled snakes. This unexpected finding constitutes the first likely report of …
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Assessing species-specific reproductive variation to inform assisted reproductive technologies for Canadian snakes
… in wild population; late July through August in rattlesnakes, and late May through June in ratsnakes. I found species-specific variation in quality and concentration of spermatozoa, but not during the intervals predicted. To characterize the reproductive hormone cycle, faeces from captive …
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In the Dead Season
… through the eyes of a central child narrator. Rattlesnakes, tarantulas, drought, flood, birth, death, the poems present everyday occurrences and suggest that we often experience events before we have the context, knowledge, or emotional maturity to make sense of them in any reasonable manner. …
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Immunological Responses in the Prairie Rattlesnake CROTALUS VIRIDIS VIRIDIS Rafinesque 1818, to Laboratory Infection with Tetrathyridia of MESOCESTOIDES CORTI Hoeppli 1925 (Eucestoda : Mesocestoididea)
<p>Prairie rattlesnakes, of the species Crotalus viridis virldis, were orally, infected with tetrathyridia of Mesocestoides corti to determine the host response to the parasite. Snakes were maintained at constant temperatures of 25, 30, and 35 C for 4--24 weeks. Blood chemistry evaluations of the …
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