Energy budget of male and female bank voles exposed to long-day photoperiod
| . | Response phase . | . | . | . | ||
|---|---|---|---|---|---|---|
| . | Stable . | Increase . | Plateau . | P . | ||
| Males | ||||||
| Change in BM (g day-1) | 0.01±0.01 | 0.08±0.02 | 0.01±0.004 | <0.001* | ||
| Food intake (g day-1) | 6.37±0.43 | 6.39±0.33 | 6.28±0.29 | 0.56 | ||
| Energy assimilated (kJ day-1) | 81.8±5.50 | 83.0±4.35 | 81.6±3.70 | 0.55 | ||
| RMR (kJ) | 29.0±1.40 | 30.6±1.61 | 0.15 | |||
| DEE (kJ) | 86.6±6.26 | 88.8±5.13 | 0.79 | |||
| Females | ||||||
| Change in BM (g day-1) | 0.003±0.01 | 0.10±0.02 | 0.01±0.01 | <0.001* | ||
| Food intake (g day-1) | 5.50±0.22 | 5.59±0.17 | 5.66±0.18 | 0.09 | ||
| Energy assimilated (kJ day-1) | 70.8±2.78 | 72.7±2.27 | 73.6±2.32 | 0.02** | ||
| RMR (kJ) | 28.8±1.45 | 28.0±1.18 | 0.55 | |||
| DEE (kJ) | 80.7±2.75 | 70.9±3.95 | 0.06 | |||
| . | Response phase . | . | . | . | ||
|---|---|---|---|---|---|---|
| . | Stable . | Increase . | Plateau . | P . | ||
| Males | ||||||
| Change in BM (g day-1) | 0.01±0.01 | 0.08±0.02 | 0.01±0.004 | <0.001* | ||
| Food intake (g day-1) | 6.37±0.43 | 6.39±0.33 | 6.28±0.29 | 0.56 | ||
| Energy assimilated (kJ day-1) | 81.8±5.50 | 83.0±4.35 | 81.6±3.70 | 0.55 | ||
| RMR (kJ) | 29.0±1.40 | 30.6±1.61 | 0.15 | |||
| DEE (kJ) | 86.6±6.26 | 88.8±5.13 | 0.79 | |||
| Females | ||||||
| Change in BM (g day-1) | 0.003±0.01 | 0.10±0.02 | 0.01±0.01 | <0.001* | ||
| Food intake (g day-1) | 5.50±0.22 | 5.59±0.17 | 5.66±0.18 | 0.09 | ||
| Energy assimilated (kJ day-1) | 70.8±2.78 | 72.7±2.27 | 73.6±2.32 | 0.02** | ||
| RMR (kJ) | 28.8±1.45 | 28.0±1.18 | 0.55 | |||
| DEE (kJ) | 80.7±2.75 | 70.9±3.95 | 0.06 | |||
Values are means ± s.e.m.
RMR, resting metabolic rate; DEE, daily energy expenditure.
Males (N=11): Stable-phase = Days —13 to 3; Increase-phase =Days 3—24; Plateau-phase = Days 24—73; Females (N=12):Stable-phase = Days —13 to 9; Increase-phase = Days 9—24;Plateau-phase = Days 24—73.
Photoperiod switched from SD to LD on Day 0.
Increase-phase is greater than Stable and Plateau-phases
Plateau-phase is greater than Stable-phase