Diel activity and thermoregulatory behavior of a fully aquatic frog: Xenopus laevis |
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Authors: | Martha Elizabeth Casterlin William Wallace Reynolds |
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Institution: | (1) Marine Biology Program, University of New England, 04005 Biddeford, Naine, USA |
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Abstract: | Ten adult Xenopus laevis were tested individually for 48-hr periods, following an initial 24-hr introductory period, in electronic shuttleboxes which allowed them to control water temperatures without operant conditioning. Locomotor activity was recorded via photocell-monitored light beams. The frogs were nocturnal, being nearly twice as active at night as during the day. The mean preferred temperature was 22.4°C, with no significant difference between night (22.5°C) and day (22.3°C), although the modal preferendum shifted from 24°C by day to 22°C at night, with a corresponding change in skewness. The range of voluntarily occupied temperatures was 14–32°C by day and 14–29°C at night. The median thermal preferendum was 22°C both day and night. |
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Keywords: | thermoregulation behavior temperature preference diel activity circadian rhythms frog Xenopus laevis amphibian |
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