Table 1.

Baseline values for the behaviours

Behaviour	α (kJ)	C RM (kJ)a	λ	β b
1. Forage 1	80	45	0.8	2.5 × 10−3 × x p
2. Forage 2	60	45	0.8	1.25 × 10−3 × x p
3. Rest	0	45	1	2.5 × 10−4
4. Decrease	0	45–y save	1	5 × 10−2/3.7 × 10−4
5. Increase	0	45–y save	1	5 × 10−2/3.7 × 10−4
6. Constant hypoth	0	45–y save	1	5 × 10−2/3.7 × 10−4

The values are given per day rather than per 5-min period, since this is more intuitive and comparable with literature

^aMetabolism when foraging is linearly mass-dependent

^bPredation risk is an accelerating mass-dependent cost. For behaviours 4–6, the first β value is for day-time hypothermia, the second for night-time hypothermia