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.
Results
Showing 1 to 11 of 11 for “"Desert tortoise"”.
-
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 …
-
Analysis of courtship behaviors of the desert tortoise, Gopherus agassizii
… courtship 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 …
-
Spatial Ecology of the Desert Tortoise: Sampling Frequency and Biological Influences
… species 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 …
-
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 …
-
Connecting the Plots: Anthropogenic Disturbance and Mojave Desert Tortoise (Gopherus agassizii) Genetic Connectivity
… the risk of population decline. The Mojave Desert historically exhibited high ecological connectivity, but human presence has increased recently, as has habitat disturbance. Human land use primarily occurs in Mojave desert tortoise (Gopherus agassizii) habitat posing risks to the federally …
-
Characterizing Habitat and Densities of the Mojave Desert Tortoise (Gopherus agassizii) at Multiple Spatial Scales
… influence 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 …
-
Effects of elevated carbon dioxide on Bromus rubens and nutritional consequences for the desert tortoise
… dioxide conditions on forage quality for the desert tortoise (Gopherus agassizii), using a common diet component, Bromus rubens. Nitrogen balance was monitored for tortoises fed pelleted diets reflecting the nitrogen levels of Bromus plants grown under elevated and ambient CO2 conditions, with …
-
The genes must flow: using movement ecology to understand connectivity of Mojave desert tortoise (Gopherus agassizii) populations in altered landscapes
… gene flow across a landscape. The Mojave desert tortoise (Gopherus agassizii) is a threatened species of the southwestern United States that historically had range-wide genetic connectivity. Human activity has and continues to alter and fragment tortoise habitat and maintaining/restoring …
-
Development of Cardiovascular Regulation in Embryos of the Domestic Fowl (Gallus Gallus), with a Partial Comparison to Embryos of the Desert Tortoise (Gopherus Agassizii)
… patterns were determined in embryos of the desert tortoise suggesting fundamental differences between in-utero and ex-utero developing vertebrates.
-
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. …