. | . | Experimental group . | . | . | H vs L (t-test) . | . | H vs R (t-test) . | . | ||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Parameter . | Units . | L . | H . | R . | t12 . | P . | t11 . | P . | ||||
Baseline phase | ||||||||||||
Activity | ×103 revs day–1 | 15.5±2.6 | 20.9±2.6 | – | 1.4 | 0.18 | – | – | ||||
Energy intake* | kJ day–1 | 81.0±2.9 | 85.3±3.6 | 65.8±1.6 | 0.9 | 0.37 | 5.2 | 0.0003 | ||||
Body mass | g | 32.1±0.5 | 29.8±0.7 | 30.6±0.9 | 2.8 | 0.02 | –0.7 | 0.52 | ||||
Workload phase | ||||||||||||
Activity | ×103 revs day–1 | 21.0±2.9 | 24.9±2.4 | – | 1.0 | 0.35 | – | – | ||||
Energy intake* | kJ day–1 | 69.5±5.4 | 52.6±2.6 | 52.5±2.5 | 2.5 | 0.03 | 0.02 | 1.00 | ||||
Body mass | g | 33.5±1.3 | 27.5±1.1 | 31.0±0.8 | 3.5 | 0.005 | –2.6 | 0.02 |
. | . | Experimental group . | . | . | H vs L (t-test) . | . | H vs R (t-test) . | . | ||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Parameter . | Units . | L . | H . | R . | t12 . | P . | t11 . | P . | ||||
Baseline phase | ||||||||||||
Activity | ×103 revs day–1 | 15.5±2.6 | 20.9±2.6 | – | 1.4 | 0.18 | – | – | ||||
Energy intake* | kJ day–1 | 81.0±2.9 | 85.3±3.6 | 65.8±1.6 | 0.9 | 0.37 | 5.2 | 0.0003 | ||||
Body mass | g | 32.1±0.5 | 29.8±0.7 | 30.6±0.9 | 2.8 | 0.02 | –0.7 | 0.52 | ||||
Workload phase | ||||||||||||
Activity | ×103 revs day–1 | 21.0±2.9 | 24.9±2.4 | – | 1.0 | 0.35 | – | – | ||||
Energy intake* | kJ day–1 | 69.5±5.4 | 52.6±2.6 | 52.5±2.5 | 2.5 | 0.03 | 0.02 | 1.00 | ||||
Body mass | g | 33.5±1.3 | 27.5±1.1 | 31.0±0.8 | 3.5 | 0.005 | –2.6 | 0.02 |
Female mice experienced low foraging costs (L), high foraging costs (H) or food restriction without foraging (R)
Means ± s.e.m. are given for each parameter, calculated over a 7 day interval at the end of each experimental phase (intervals ± 1 day;baseline: –10 to –4; workload: 21 to 27). Samples sizes per group were L=8, H=6, R=7. Results of independent t-tests are given (with d.f. shown in subscript)
Bold type highlights significant P values
Energy intake is based on grams of food ingested and manufacturer's estimate of energy content from food (line 3 of Table 1)