Albatrosses have a rapid thermogenic response to cold meals
| Genera . | Meal temperature (°C) . | N . | PPMRmax (kJ kg–1 day–1) . | PPMR rise time (min) . | dMR/dt0 (W kg–1 min–1) . |
|---|---|---|---|---|---|
| Thalassarche | 0 | 5 | 453.1±35.5 | 14.0±1.5 | 0.32±0.04 |
| 20 | 5 | 306±72 | 13.2±1.0 | 0.32±0.04 | |
| 40 | 6 | 293.3±75.7 | 57.0±4.2 | 0.10±0.03 | |
| Diomedea | 0 | 6 | 851±48 | 13.4±2.0 | 0.75±0.08 |
| 20 | 2 | 923±15 | 17.6±3.1 | 0.86±0.20 | |
| 40 | 6 | 756±59 | 73.9±10.3 | 0.17±0.03 |
| Genera . | Meal temperature (°C) . | N . | PPMRmax (kJ kg–1 day–1) . | PPMR rise time (min) . | dMR/dt0 (W kg–1 min–1) . |
|---|---|---|---|---|---|
| Thalassarche | 0 | 5 | 453.1±35.5 | 14.0±1.5 | 0.32±0.04 |
| 20 | 5 | 306±72 | 13.2±1.0 | 0.32±0.04 | |
| 40 | 6 | 293.3±75.7 | 57.0±4.2 | 0.10±0.03 | |
| Diomedea | 0 | 6 | 851±48 | 13.4±2.0 | 0.75±0.08 |
| 20 | 2 | 923±15 | 17.6±3.1 | 0.86±0.20 | |
| 40 | 6 | 756±59 | 73.9±10.3 | 0.17±0.03 |
In comparison to values measured at 40°C (food temperature, Tf=Tb), maximum PPMR(PPMRmax) is greater and PPMR rise times are less for albatrosses fed cold meals. Measured values (means ± s.e.m.) for these variables are given here for albatrosses fed meals at 0°C, 20°C and 40°C. dMR/dt0, initial rate of change of MR