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 11 of 11 for “"Bufo boreas"”.
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Pharmacological effects of a bufadienolide isolated from the toad Bufo boreas halophilus
<p>For centuries, men have known that the skin of toads and other amphibians possess pharmacologically active compounds (Abel and Nacht,1911;Chen and Jensen,1929;Chen and Kovarikova,1967).All amphibians produce toxins in glands scattered over the skin .Many anuran amphibians have parotoid glands …
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Genetic structure and disease prevalence of boreal toads (Bufo boreas) in Glacier National Park
… threats to the persistence of boreal toads (Bufo boreas) in Glacier National Park, USA, I genotyped 551 individuals at 11 microsatellite loci and used spatially independent (STRUCTURE) and spatially explicit (GENELAND) Bayesian methods to describe population genetic structure and identify …
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Genetic structure and disease prevalence of boreal toads (Bufo boreas) in Glacier National Park
… threats to the persistence of boreal toads (Bufo boreas) in Glacier National Park, USA, I genotyped 551 individuals at 11 microsatellite loci and used spatially independent (STRUCTURE) and spatially explicit (GENELAND) Bayesian methods to describe population genetic structure and identify …
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The Dogma of the 30 Meter Riparian Buffer: The Case of the Boreal Toad (Bufo boreas boreas)
… vertebrate species, using the boreal toad (Bufo boreas boreas) as an example. We monitored toad populations in south-central Utah using radio telemetry during the summers of 2003 and 2004. We found 30 m buffers inadequate for protecting boreal toads and suggest this is likely true for other …
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Movements of adult western toads, Bufo boreas, in a managed forest landscape and the incidence of a disease in southwestern British Columbia
… emerging infectious diseases. The western toad, Bufo boreas, is an IUCN red-listed species thought to be affected by both these factors. The objectives of this thesis were to (1) determine how forest fragmentation affects western toad movement behaviour; and (2) determine if there is any evidence …
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Predicting Amphibian Occurrence Based on Wetland and Landscape Level Factors in Montana
… the western population of Ambystoma tigrinum, Bufo boreas, and Rana luteiventris was best predicted by landscape covariates. Models with a combination of local and landscape covariates were best supported for Rana pipiens, Bufo woodhousii, Pseudacris maculata, and Pseudacris regilla. The …
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Predicting Amphibian Occurrence Based on Wetland and Landscape Level Factors in Montana
… the western population of Ambystoma tigrinum, Bufo boreas, and Rana luteiventris was best predicted by landscape covariates. Models with a combination of local and landscape covariates were best supported for Rana pipiens, Bufo woodhousii, Pseudacris maculata, and Pseudacris regilla. The …
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State-wide assessment of status, predicted distribution, and landscape-level habitat suitability of amphibians and reptiles in Montana
… support for declines in Western Toad (<i>Bufo boreas</i>) and Northern Leopard Frog (<i>Rana pipiens</i>) populations in western Montana, and identified a variety of conservation issues of concern that can be addressed through management actions (e.g., clear evidence for negative impacts …
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State-wide assessment of status, predicted distribution, and landscape-level habitat suitability of amphibians and reptiles in Montana
… support for declines in Western Toad (<i>Bufo boreas</i>) and Northern Leopard Frog (<i>Rana pipiens</i>) populations in western Montana, and identified a variety of conservation issues of concern that can be addressed through management actions (e.g., clear evidence for negative impacts …