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Infographic: Metabolic Theory in Elephants and Mice
Characteristic |
Units & Formula |
Mouse |
Elephant |
Weight |
Grams
|
20 |
2,000,000 |
Metabolic rate |
Watts
4.1 M 0.75 |
20.5 |
1226 |
Metabolic rate/weight |
Watts/grams
0.018 M -0.25 |
0.049 |
0.0027 |
Heart rate |
Beats per minute
240 M-0.25 |
640 |
36 |
Lifespan |
Years
5.3 M0.25 |
2 |
35 |
Heartbeats/lifetime |
|
700,000,000 |
700,000,000 |
Respiration rate |
Breaths per minute
54 M -0.25 |
145 |
8 |
Breaths per lifetime
|
|
150,000,000 |
150,000,000 |
Duration of pregnancy |
Days
60 M0.25 |
23 |
401 |
Population doubling time |
Years
0.6 M0.25 |
0.22 |
4 |
Population density |
Individuals per square kilometer
100 M-0.75 |
1800 |
0.33 |
Rate of DNA base substitution |
% substitutions per million years
3.8 M-0.25M |
10 |
0.6 |
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