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Seasonal acclimation in resting metabolism of the skink, Mabuya brevicollis (Reptilia: Scincidae) from southwestern Saudi Arabia
The resting metabolic rate (RMR) of seasonally-acclimated Mabuya brevicollis of various body masses was determined at 20, 25, 30, 35 and 40°C, using open-flow respirometry. RMR (mlg−1h−1) decreased with increasing mass at each temperature. RMRs increaProd. Type: FTPsed as temperature increased. The...
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Published in: | Journal of thermal biology 2013-10, Vol.38 (7), p.449-453 |
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Main Author: | |
Format: | Article |
Language: | English |
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Online Access: | Get full text |
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Summary: | The resting metabolic rate (RMR) of seasonally-acclimated Mabuya brevicollis of various body masses was determined at 20, 25, 30, 35 and 40°C, using open-flow respirometry. RMR (mlg−1h−1) decreased with increasing mass at each temperature. RMRs increaProd. Type: FTPsed as temperature increased. The highest and lowest Q10 values were obtained for the temperature ranges 20–25°C and 30–35°C for the summer-acclimated lizards. The exponent of mass “b” in the metabolism-body mass relation ranged from 0.41 to 0.61. b values were lower in the autumn and winter-acclimated lizards than in spring and summer-acclimated lizards. Seasonal acclimation effects were evident at all temperatures (20–40°C) for M. brevicollis. Winter-acclimated skinks had the lowest metabolic rates at different temperatures. The pattern of acclimation exhibited by M. brevicollis may represent a useful adaptation for lizards inhabiting subtropical deserts to promote activity during their active seasons.
•The resting metabolic rate of seasonally-acclimated Mabuya brevicollis increased as temperature increased.•The exponent of mass “b” in the metabolism-body mass relation ranged from 0.41 to 0.61.•Winter-acclimated skinks had the lowest metabolic rates at different temperatures.•The pattern of acclimation exhibited by M. brevicollis may represent a useful adaptation for lizards inhabiting subtropical deserts to promote activity during their active seasons. |
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ISSN: | 0306-4565 1879-0992 |
DOI: | 10.1016/j.jtherbio.2013.06.004 |