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The resting metabolic rate (RMR) of seasonally-acclimated Mabuya brevicollis of various body masses was determined at 20, 25, 30, 35 and 40 degrees C, using open-flow respirometry. RMR (ml g(-1) h(-1)) decreased with increasing mass at each temperature. RMRs increa Prod. Type: FTPsed as temperature increased. The highest and lowest Q(10) values were obtained for the temperature ranges 20-25 degrees C and 30-35 degrees 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 degrees 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. (C) 2013 Elsevier Ltd. All rights reserved.