Within thermoneutrality, [.H]_{b} (mL O_{2}.g^{-1}.h^{-1}) was
0.54 +-0.09 for trapped males in summer, 0.46 +-0.07 for captive males
in summer, 0.42 +-0.07 for captive females in summer, 0.47 +-0.06 for
captive males in winter, and 0.46 +-0.10 for captive females in winter
(Figures 2, 3). Ratios of these measured values to those predicted by
the Kleiber (1932, 1961:206) equation are 1.28, 1.12, 1.02, 1.17, and
1.09, respectively. To minimize the effect of body size (Mellen, 1963)
and to facilitate comparisons between sexes and seasons and between
captive and trapped animals, basal metabolism also was calculated as a
function of metabolic body size (mL O_{2}.kg^{-0.75}.h^{-1}; Table 2).
Based on this analysis, trapped summer males had a higher basal
metabolism than captive males (p<0.025) or females (p<0.005) in either
season (Table 2). There was no difference in basal metabolism between
captive males and females in either summer or winter, and there was no
seasonal difference in their basal metabolic rates (Table 2).