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EVOLUTIONARY RELATIONSHIPS OF THE TOADS OF THE BUFO PUNCTATUS GROUPFerguson, J. Homer January 1964 (has links)
No description available.
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Seasonal cycles of the interstitial cells in the testis of the horned toad (Phyrnosoma solare)Blount, Raymond F. January 1926 (has links)
No description available.
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The effects of dehydration on in vitro transport of phenol red in renal tubules of Phrynosoma solareCorneveaux, John James, 1943- January 1967 (has links)
No description available.
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Landscape structure affects different Eastern Ontario anuran species at different spatial scales /Dam, Amanda F. January 1900 (has links)
Thesis (M.Sc.) - Carleton University, 2005. / Includes bibliographical references (p. 27-33). Also available in electronic format on the Internet.
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Factors promoting variation in feeding morphology of larval southern toads (Bufo terrestris)Schacht, Matthew C. January 2009 (has links)
Thesis (M.S.)--Georgia Southern University, 2009. / "A thesis submitted to the Graduate Faculty of Georgia Southern University in partial fulfillment of the requirements for the degree Master of Science." Directed by Lance McBrayer. ETD. Includes bibliographical references (p. 76-80) and appendices.
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Sexual selection in Fowler's toad, Bufo woodhousei fowleri /Thornhill, Gary Marshal January 1985 (has links)
No description available.
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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 ColumbiaDeguise, Isabelle Emiola 05 1900 (has links)
Amphibians are declining dramatically around the globe, due primarily to two major threats: habitat destruction and 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 of the infectious disease, the chytrid fungus (Batrachochytrium dendrobatidis), in this species in British Columbia.
I used radio-telemetry to 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 were able to perceive clear-cut edges from as far as 150 m. Greater than 60% of toads released in forest patches actively chose to enter the clear-cuts from adjacent forests, indicating high boundary permeability. In addition, toad movement parameters were not significantly reduced in these disturbed environments, suggesting that clear-cuts do not restrict movement. Although toads appear to favour these disturbed environments, further research is required in larger, more realistically sized clear-cuts.
To investigate the prevalence of the chytrid fungus in southwestern British Columbia, I tested a breeding population of western toads in a protected area. Results showed a 28% infection rate, although no toads showed any visual signs of the disease. These results provide the first evidence of the chytrid fungus in western toads in British Columbia and suggest that the disease is potentially more widespread that currently documented.
The results of my research suggest that the western toad may not be affected by small scale forest harvesting. In addition, my results support the hypothesis that western toads are reservoirs for the chytrid fungus. Although most populations in Canada appear to be faring well, long-term population monitoring and further testing for chytrid prevalence are required. To minimize the likelihood of western toads experiencing the dramatic declines that are presently taking place in the United States, protecting vital habitats and preventing the spread of chytrid through public awareness are required.
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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 ColumbiaDeguise, Isabelle Emiola 05 1900 (has links)
Amphibians are declining dramatically around the globe, due primarily to two major threats: habitat destruction and 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 of the infectious disease, the chytrid fungus (Batrachochytrium dendrobatidis), in this species in British Columbia.
I used radio-telemetry to 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 were able to perceive clear-cut edges from as far as 150 m. Greater than 60% of toads released in forest patches actively chose to enter the clear-cuts from adjacent forests, indicating high boundary permeability. In addition, toad movement parameters were not significantly reduced in these disturbed environments, suggesting that clear-cuts do not restrict movement. Although toads appear to favour these disturbed environments, further research is required in larger, more realistically sized clear-cuts.
To investigate the prevalence of the chytrid fungus in southwestern British Columbia, I tested a breeding population of western toads in a protected area. Results showed a 28% infection rate, although no toads showed any visual signs of the disease. These results provide the first evidence of the chytrid fungus in western toads in British Columbia and suggest that the disease is potentially more widespread that currently documented.
The results of my research suggest that the western toad may not be affected by small scale forest harvesting. In addition, my results support the hypothesis that western toads are reservoirs for the chytrid fungus. Although most populations in Canada appear to be faring well, long-term population monitoring and further testing for chytrid prevalence are required. To minimize the likelihood of western toads experiencing the dramatic declines that are presently taking place in the United States, protecting vital habitats and preventing the spread of chytrid through public awareness are required.
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A study of the notochord, musculature and nervous system of the tail of Xenopus laevis (Daudin, 1802) with particular reference to flickering movementDalooi, M. R. K. January 1977 (has links)
No description available.
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Aparato sexual femenino del Bufo arenarum variaciones cíclicas y mecanismos reguladores de su actividad y estructura,López Colombo de Allende, Inés. January 1938 (has links)
Tesis--Córdoba (Argentina). / "General conclusions" in English: p. 156-158. "Bibliografía": p. 159-164.
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