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 49 for “"Toads"”.
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Tracking Toads: Movement Patterns of Gulf Coast Toads (Incilius nebulifer) and the Urban Environment
Gulf Coast Toads (Incilius nebulifer) are a familiar urban resident in the southeast United States and Mexico. As urbanization increases, the Gulf Coast Toad may be expanding its range. Studying movement behavior can reveal how invasive a species may be and is a key factor in understanding the …
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The Evolution of Mate Choice in Spadefoot Toads
… examined male aggregation behavior in spadefoot toads. In phonotaxis experiments, males associated with a stimulus simulating a conspecific calling male, when given a choice between conspecific and heterospecific calls. When males were presented with different conspecific calls, poor-condition …
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TOADS : a two-dimensional open-ended architectural database system
Thesis (S.B. and M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.
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Factors Promoting Variation in Feeding Morphology of Larval Southern Toads (Bufo Terrestris)
… morphology and denticle length of Southern toads (Bufo terrestris) in a laboratory setting, and 2) evaluate the potential for light intensity to affect chondrocranial morphology, denticle length, size, and developmental time of B. terrestris raised in three different shade environments. …
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Genetic structure and disease prevalence of boreal toads (Bufo boreas) in Glacier National Park
… To address 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 …
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Genetic structure and disease prevalence of boreal toads (Bufo boreas) in Glacier National Park
… To address 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 …
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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
… follow daily movement patterns of 23 adult male toads in a fragmented landscape near Vancouver, BC, composed of forest patches and small, recent clear-cuts. Movement parameters were analyzed using a Geographic Information System (GIS) and mixed effects models. Results showed that toads in forests …
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The garden house
… is a collection of poems on love, loss, and toads. Three main sections explore the primary speaker’s journey through “The Real World,” “Frog Fortunes + Toad Tellings,” and “Garden House.” “The Real World” acts as an introduction to the speaker’s family and experiences. It reinforces the need …
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Effects of sodium chloride and sodium gluconate concentration on hydration behavior and water transport in the red-spotted toad, Bufo punctatus
Toads hydrate from standing water or moist substrates by osmotic absorbtion across the ventral skin. On land toads adopt a distinctive posture called the water absorption response (WR) to maximize contact with the substrate and facilitate water absorption. Experiments using hydration behavior on …
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The rehydration behavior of the desert toad, Bufo punctatus
The red spotted toads, (Bufo punctatus), demonstrate a "water absorption response" (WR) in which they aduct the hindlimbs and press the ventral skin to a moist surface. Associated with the WR, toads showed three characteristic behaviors: (a) moves, in which the toads would systematically move to …
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Chemical Evidence for Dietary Toxin Sequestration in the Asian Snake <i>Rhabdophis tigrinus</i>
… typically contain bufadienolide toxins. Whereas toads are known to synthesize bufadienolide steroids from cholesterol precursors, we found that chemically undefended <em>R. tigrinus</em> must sequester bufadienolides from ingested toads in order to exhibit these compounds in their nuchal glands. …
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The Dogma of the 30 Meter Riparian Buffer: The Case of the Boreal Toad (Bufo boreas boreas)
… 30 m buffers inadequate for protecting boreal toads and suggest this is likely true for other species as well. Managers must consider several factors when constructing buffers: (1) Buffer requirements may vary by time of year. While we located toads most often in wet habitats, toads commonly …
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The Conservation Ecology of Rana temporaria and Bufo bufo in Leicestershire
… the appetites or be injurious to frogs and toads. Transmitter implanted toads inhabited rough vegetation by day, foraging over ploughed land by night. Tadpole field sampling proved an inadequate breeding site survey technique for both species but revealed frog larvae to be widely dispersed …
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Priority effects of overwintered Rana tadpoles on larval Southern toad (Bufo terrestris Bonnaterre)
… of spring-breeding anurans, including Southern toads, are adversely affected by the presence of large tadpoles from the prior summer. I examined several mechanisms potentially responsible for this effect: overwintering tadpoles changing the environment during the winter; large tadpoles …
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Life in the Dirt: Factors Influencing the Behavior and Distribution of Spea Intermontana in Eastern Washington State
… rate of metamorphosis of Great Basin Spadefoot Toads. The second study used 5 categories of field data (hydrography, elevation, soil type, land use, and land cover), to produce a predictive model for finding novel populations of Spadefoot Toads in Washington State. Data from local and government …
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Interactive effects of wildfire and disturbance history on amphibians and their parasites
… habitat use affects the probability that boreal toads had chytridiomycosis, a disease linked with amphibian declines worldwide. Probability of infection was lower for toads captured terrestrially than aquatically, and was lower for toads captured in recently burned habitats compared with unburned …
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Interactive effects of wildfire and disturbance history on amphibians and their parasites
… habitat use affects the probability that boreal toads had chytridiomycosis, a disease linked with amphibian declines worldwide. Probability of infection was lower for toads captured terrestrially than aquatically, and was lower for toads captured in recently burned habitats compared with unburned …
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