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 66 for “"tortoise"”.
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Seasonal Variation in Desert Tortoise Immune Function
Threatened Mojave desert tortoise (Gopherus agassizii) populations may be negatively impacted by upper respiratory tract disease. To more fully understand the general impact of diseases in wild populations, a more complete knowledge of the factors that contribute to immunocompetence in this species …
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The Tortoise and the Landscape: Examining the Habitat, Daily Movement, Home Range Size, and Thermal Ecology of the Texas Tortoise (Gopherus berlandieri)
… by examining the habitat ecology of the Texas tortoise (Gopherus berlandieri). Within its limited geographic range in southern Texas and northern Mexico, G. berlandieri occurs across a variety of environments (i.e., vegetation types) and environmental gradients, but prior research has been …
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Analysis of courtship behaviors of the desert tortoise, Gopherus agassizii
… behavior have been published for the desert tortoise, Gopherus agassizii. However, the amount and sources of variation in courtship behaviors have not been documented. I examined courtship behavior by analyzing videotaped interactions between captive males and females. I calculated duration …
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Tortoise mortalities along fences in the southeastern Karoo, South Africa
… practices. Recent studies found that leopard tortoises (Stigmochelys pardalis) are more prone to dying from electrocution along electric fences than any other taxa. However, no studies have quantified tortoise mortality along non-electric fences or assessed the impact of fence structure. With …
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Spatial Ecology of the Desert Tortoise: Sampling Frequency and Biological Influences
… may aid conservation efforts.</p> <p>The Desert Tortoise <em>(Gopherus agassizii)</em>of the Mojave Desert inhabits an extreme environment where a number of factors likely influence its land use patterns. Prior home range estimates of the Desert Tortoise are wide ranging from different portions …
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Burrows and bedding : site taphonomy and spatial archeaology at Tortoise cave
Excavations at the Late Stone Age site of Tortoise Cave, a shell midden accumulation in the Western Cape, South Africa, were carried out from 1978 to 1983. The author supervised this project from 1981 onwards with the aim of expanding the cultural sample and defining more clearly the stratigraphic …
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Using simulations to predict the genetic connectivity of the Mojave desert tortoise
The Mojave desert tortoise is a threatened species that is facing habitat fragmentation from human development. Understanding the impact of fragmentation on this species is critical for developing appropriate conservation actions, but the effects of habitat fragmentation are often delayed, making …
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Connecting the Plots: Anthropogenic Disturbance and Mojave Desert Tortoise (Gopherus agassizii) Genetic Connectivity
… Human land use primarily occurs in Mojave desert tortoise (Gopherus agassizii) habitat posing risks to the federally threatened species, which has declined as a result. As threats intensify, so does the need to protect tortoise habitat and connectivity. Functional corridors require appropriate …
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PRE- AND POST-COPULATORY SEXUAL SELECTION IN THE TORTOISE BEETLE ACROMIS SPARSA (COLEOPTERA: CHRYSOMELIDAE)
… pre- and post-copulatory processes in the tortoise beetle <italic>Acromis sparsa</italic>.</p> <p>I examined the relationship between traits involved in pre-copulatory strategies, such as secondary sexual characters, and traits involved in post-copulatory strategies, such as primary sexual …
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PRE- AND POST-COPULATORY SEXUAL SELECTION IN THE TORTOISE BEETLE ACROMIS SPARSA (COLEOPTERA: CHRYSOMELIDAE)
… pre- and post-copulatory processes in the tortoise beetle <italic>Acromis sparsa</italic>.</p> <p>I examined the relationship between traits involved in pre-copulatory strategies, such as secondary sexual characters, and traits involved in post-copulatory strategies, such as primary sexual …
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Parasite Burden and Potential Virus Exposure in the Gopher Tortoise <em>(Gopherus polyphemus)</em>
<p>Long-lived reptiles such as the gopher tortoise (<em>Gopherus polyphemus</em>) may serve as hosts for arboviruses, especially Eastern Equine Encephalitis Virus (EEEV), in the southeastern United States, and such a role may be related to endo- and ectoparasite loads in the tortoise. To assess …
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Quantum Economic Advantage Calculator: An Extension of the Quantum Tortoise and Classical Hare Framework
For some algorithmic problems, quantum computation has the potential to provide enormous speedups over classical computers. However, the drastic slowdowns associated with running error-free quantum hardware make achieving these theoretical advantages challenging. Researchers and industry leaders …
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Patterns in the Presence of Respiratory Tract Mycoplasmas in Four Species of North American Tortoises
… tract disease (URTD) in some species of tortoises. Here, we sought to determine the presence and frequency of these bacteria among four North American tortoise species: Gopherus polyphemus (gopher tortoise), G. berlandieri (Texas tortoise), G. morafkai (Sonoran desert tortoise), and G. …
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Characterizing Habitat and Densities of the Mojave Desert Tortoise (Gopherus agassizii) at Multiple Spatial Scales
… on the distribution of the Mojave desert tortoise (Gopherus agassizii) is key to improving population estimates and better understanding how this species uses their habitat around them. The Mojave Desert tortoise is a federally listed threated species and a key component to their delisting …
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Coexistence and resource use in space and time in a West African tortoise beetle community
Tropical rain forests and coral reefs are usually regarded as the epitome of complexity and diversity. The mechanisms, however, that allow so many species to coexist continuously, still need to be unraveled. Earlier equilibrium models explain community organization with a strict niche separation …
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