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 12 of 12 for “"Wood frogs"”.
-
Population genetics of wood frogs (Lithobates sylvaticus) in a forested ridge-top wetland ecosystem
… distribution of population genetic diversity of wood frogs in natural ridge-top wetlands and what factors influence this. Genetic data were analyzed for nine microsatellite DNA loci from twenty-five wood frog egg clutches at each of five randomly selected natural wetlands. Overall, genetic …
-
Interactions between Eastern Newts and Wood Frogs in an anthropogenically altered wetland system in eastern Kentucky
… by species with short larval periods (e.g., Wood Frogs [<em>Lithobates sylvaticus<em>] and Marbled Salamanders [<em>Ambystoma opacum<em>]). Over the last 25 years, hundreds of wetlands have been constructed within the ridge-top ecosystem as permanent water sources for wildlife (i.e., game …
-
Monitoring amphibian populations and the status of wood frogs and boreal chorus frogs in the Kawuneeche Valley of Rocky Mountain National Park
… of egg masses as a state variable for monitoring wood frogs and other pond-breeding amphibians. Specifically, I assessed patterns of detectability in wood frog egg masses and evaluated the statistical power of using counts of egg masses and linear regression to detect trends. In Chapter 1, I used …
-
Assessing the Impacts of Agricultural Land Use on Wood Frog (Lithobates sylvaticus) Presence and Health in Central Saskatchewan
… the more common amphibians in this region is the wood frog (Lithobates sylvaticus), a wide-ranging species that occupies a variety of ecosystems, from forests to prairies to tundra. This makes it an ideal model species to compare results in ecological and toxicological studies. Given anecdotal …
-
Amphibians in a changing world: assessing the effects of warming and drying on amphibian larvae and the relationships between larval survival, body size, and time to metamorphosis
… larval responses of two amphibian species, wood frogs (<em>Lithobates sylvaticus</em>) and spring peepers (<em>Pseudacris crucifer</em>), to simulated warming and drying in experimental ponds. Over 13 weeks, we manipulated temperature and water levels in ponds to produce 4 treatments: …
-
Regulation of the Nuclear Factor of Activated T Cell (NFAT) Family of Transcription Factors in the Freeze Tolerant Wood Frog, Rana sylvatica
During winter, wood frogs (Rana sylvatica) can endure whole body freezing with 65-70% of total body water converted to extracellular ice. As a result, cells experience extensive dehydration when water exits as well as anoxia due to interruption of blood flow. Adapting to such challenges requires …
-
The Effects of Neuroendocrine Stress on Larval Development
… energetics, and nutrient oxidation in larval wood frogs. The results show that GC hormones increase metabolism, reduce lipid stores, and increase protein oxidation during metamorphic climax. Chapter three focuses on the effects of GC hormones on immune function and r susceptibility. I found …
-
Amphibian Community Similarity Between Natural Ponds And Constructed Ponds Of Multiple Types In Daniel Boone National Forest, Kentucky
… canopy cover, hydroperiod, upland coarse woody debris, aquatic vegetation, maximum depth, Ohio Wetland Rapid Assessment Score (ORAM), and pond type were recorded to examine relationships between amphibian species and habitat variables. Community comparisons were made using canonical …
-
Fish and Amphibian Occurrence in Waterfowl Production Area Wetlands in Minnesota During 1992
… of fish. The likelihood of catching Leopard frogs (Rana pipiens) and wood frogs (Rana sylvatica) was lower for barrel minnow traps when compared to clover leaf traps. Agassiz Lake Plain, percent floating vegetation, and emergent trap locations were positively associated with frog presence. …
-
Amphibian Community Composition And Disease Susceptibility In Ridge-Top Wetlands Of The Daniel Boone National Forest
… if this was due to the amplifying effect of wood frog larvae or some habitat characteristic present at natural wetland types. Batrachochytrium dendrobatidis (Bd) was not detected at any of the study wetlands. Overall, results suggest that bat wetlands in the London District are not conducive …
-
Persistence of ranavirus in an East-Central Illinois amphibian community
… to environmental covariates. I identified Green frogs (R. clamitans) as the reservoir host, which maintain pathogens longitudinally, and Wood frogs (R. sylvatica) as the amplification host, which increase transmissions and disease risk within the community. I found that transmission dynamics …
-
Amphibian and plant communities of natural and constructed upland-embedded wetlands in the Daniel Boone National Forest
… than co-occurring natural ephemeral wetlands. Wood frog and marbled salamander larvae are found almost exclusively in natural wetlands and green frog larvae and eastern newts are found in constructed wetlands. It is currently unknown whether plant communities at these constructed wetlands are …