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 51 for “"Bufo"”.
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The environmental physiology of Bufo bufo L. and Bufo calamita Laur. tadpoles.
… development, metabolism and metamorphosis in B. bufo and B. calamita tadpoles were investigated, together with a limited study on the effects of L-thyroxine. The effects of density on growth, developteI1t and metamorphosis were examined. Physiological and behavioural effects of B. bufo tadpoles …
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The Conservation Ecology of Rana temporaria and Bufo bufo in Leicestershire
… vegetation in field ponds as small as 35 m3, but Bufo bufo only in ponds over 100 m3, in areas where scrub vegetation cover exceeded 2.5% of the total area. The densities of all ponds and R. temporaria and B. bufo breeding ponds have been reduced at the rates of 2.6, 1.3 and 0.7 per km per 10 …
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ΥΠΕΡΑΡΙΘΜΟΙ ΑΝΑΓΕΝΝΗΤΙΚΟΙ ΣΧΗΜΑΤΙΣΜΟΙ ΚΑΤΑ ΤΗΝ ΟΝΤΟΓΕΝΕΣΗ ΤΟΥ ΑΚΡΟΥ ΣΤΟ ΑΝΟΥΡΟ BUFO BUFO
… FORMATION" THE REGULATION OF THE LIMB OF BUFO BUFO ALONG THE PROXIMODISTAL AXIS AND THE CREATION OF SUPERNUMERARY FORMS, WERE STUDIED. FOR THIS REASON WE RESEARCHED THE DISTAL TRANSFORMATION OF THE LIMB IN DIFFERENT STAGES OF DEVELOPMENT AND AMPUTATION LEVELS AND THE INTERCALARY …
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Back to the future? Unravelling current and potential future declines of the common toad, Bufo bufo, in the UK
… and unexplained declines of the common toad, Bufo bufo, have been recorded in the UK for over two decades, especially in southern and central England. However, the extent of these declines and their causes are poorly understood. Except for “toad patrols” taking place in many parts of the UK, …
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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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Phylogeography and Conservation of the Arroyo Toad (Bufo californicus)
<p>The Arroyo Toad <em>(Bufo cakfomicus)</em> is an endangered species found in rivers of southern California, USA and northern Baja California, Mexico. It has experienced population declines throughout its range, as a result of urbanization, hydrologic alterations, and overall habitat loss. As …
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Functional genomic study of the parotoid secretion from Bufo gargarizans
The parotoid secretion from Bufo gargarizans has been used as a traditional Chinese medicine for 2000 years in the treatment of inflammation, swelling and carbuncles. Recent studies have been focused on the small molecules, the bufadienolides and biogenic amines, the main medicinal parts in its …
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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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Factors Promoting Variation in Feeding Morphology of Larval Southern Toads (Bufo Terrestris)
… 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. Linear and …
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Evidence for the Use of Bufo marinus in the Olmec Shamanic Tool Kit
… use of toad imagery in Olmec iconography. The Bufo marinus, secretes a highly toxic poison that, when used with discretion, has hallucinogenic properties. Both archaeological and artistic representations strongly suggest imagery of the Bufo marinus was used in Olmec art as a focus of …
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Priority effects of overwintered Rana tadpoles on larval Southern toad (Bufo terrestris Bonnaterre)
In natural ecosystems, the order of species arrival can impact the development of the community. In the Atlantic Coastal Plain of the Carolinas, wetland ponds exhibit a wide range of hydroperiods, ranging from ponds that dry up in late summer, to those that persist through fall and winter into …
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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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Predator Out of Place : The Differential Impacts of Native and Non-native Crayfish on Bufo Tadpoles
… (P. clarkii) crayfish on Fowler's toad larvae (Bufo fowleri). We hypothesized P. clarkii would have a greater effect on fitness components of Bufo fowleri because it is larger, more aggressive and invasive in many parts of the world. Because these two species can co-occur, we conducted an …
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