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Fig. 4. (A) Minimal resting metabolism (diamonds, 5 min averages; open circles, 30
min averages), average daily energy use (squares), and highest oxygen
consumption (filled circles; 1 min average) at three ambient temperatures. The
solid diamond in the upper left indicates the maximal
O2 (1 min
average) during forced treadmill exercise at room temperature. Values are
means ± S.D. (for N, see text). (B) Averaged
least-squares regression lines for animals of standard mass (22.2 g) for the
relationship between running speed and oxygen consumption. The rightmost end
of each regression line indicates the mean maximum instantaneous running speed
for that temperature and the circle indicates the mean maximum 1 min average
(neither was significantly affected by temperature). Arrows indicate the
estimated O2 at
the highest attained instantaneous running speed of about 5 km
h-1.
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