Table 1.
Variable | Cold | Thermoneutral | F (df) | P | % difference (C relative to T) |
---|---|---|---|---|---|
Food intake | 3.86 ± 0.09 | 2.69 ± 0.08 | 96.4 (1,45) | <0.0001 | 43.5 |
Mass and fat | |||||
Body mass | 11.96 ± 0.16 | 12.25 ± 0.16 | 1.5 (1,47) | 0.2 | −2.4 |
Total organ fat mass | 0.88 ± 0.07 | 1.25 ± 0.06 | 16.1 (1,35) | <0.001 | −29.6 |
Furcular fat mass | 0.11 ± 0.01 | 0.15 ± 0.01 | 5.7 (1,35) | <0.05 | −26.7 |
Muscles | |||||
LD pectoralis | 0.41 ± 0.01 | 0.39 ± 0.01 | 0.97 (1,34) | 0.33 | 5.1 |
LD legsa | 0.23 ± 0.005 | 0.25 ± 0.004 | 9.2 (1,33) | <0.01 | −8.0 |
LD carcassa | 1.21 ± 0.02 | 1.24 ± 0.02 | 0.83 (1,33) | 0.37 | 2.4 |
LD total musclesa | 1.86 ± 0.04 | 1.85 ± 0.04 | 0.0005 (1,33) | 0.98 | 0.5 |
Cardio pulmonary | |||||
Heart | 0.16 ± 0.004 | 0.14 ± 0.004 | 12.0 (1,34) | <0.001 | 14.3 |
LD lungs | 0.025 ± 0.001 | 0.028 ± 0.001 | 6.4 (1,35) | <0.05 | −10.7 |
Digestive and excretory | |||||
LD gizzard | 0.087 ± 0.005 | 0.079 ± 0.005 | 1.35 (1,35) | 0.25 | 10.1 |
LD intestine | 0.039 ± 0.002 | 0.036 ± 0.002 | 1.6 (1,34) | 0.22 | 8.3 |
LD liver | 0.078 ± 0.004 | 0.066 ± 0.004 | 2.0 (1,25) | 0.17 | 18.2 |
LD pancreas | 0.0094 ± 0.0007 | 0.0048 ± 0.0007 | 23.6 (1,32) | <0.0001 | 95.8 |
LD kidneys | 0.030 ± 0.001 | 0.029 ± 0.001 | 0.21 (1,35) | 0.65 | 3.4 |
Other | |||||
LD skina | 0.11 ± 0.003 | 0.11 ± 0.003 | 0.01 (1,33) | 0.91 | 0.0 |
LD brain | 0.10 ± 0.001 | 0.11 ± 0.001 | 0.78 (1,35) | 0.38 | −9.1 |
Total LD body massa | 2.33 ± 0.05 | 2.30 ± 0.04 | 0.18 (1,33) | 0.67 | 1.3 |
Units are in grams except for food intake (g/day).
aIncludes bone mass and controls for structural body size (see text for details).