Master of Science (MS)
First Committee Member
Number of Pages
Relict Leopard frogs (Rana onca) are found in thermal springs with water temperatures in excess of 30Ã‚Â°C at the source but it's unknown whether tadpoles require reintroduction sites with specific thermal conditions for development. Tadpole survivorship at 20, 25 and 30Ã‚Â°C was 84, 93.8, and 66%, respectively, while none survived at 35Ã‚Â°C. Time to metamorphosis was significantly shorter for 25Ã‚Â°C acclimation group (62+/-8 days) followed by the 30Ã‚Â° (106+/-51 days) and 20Ã‚Â°C (260+/-47 days) acclimation groups. Development was arrested in the 15Ã‚Â°C acclimated group and survivorship declined to 63.8% after 191 days. However, 80% of the surviving larvae completed metamorphosis after temperature was increased to 25Ã‚Â°C. When placed in a thermal gradient, larvae selected temperatures closest to their acclimation temperature. Maximum burst speed was greatest at 25Ã‚Â°C for all but not the 30Ã‚Â°C acclimation groups. Thus, reintroduction sites require water temperatures between 20Ã‚Â° and 30Ã‚Â°C during most of the year.
Behavior; Development; Effects; Frog; Leopard; Onca; Rana; Relict; Tadpoles; Temperature
Ecology; Physiology; Zoology
University of Nevada, Las Vegas
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Goldstein, Jeffrey Abraham, "The effect of temperature on development and behavior of relict leopard frog tadpoles (Rana onca)" (2007). UNLV Retrospective Theses & Dissertations. 2168.