Table 3. Effects of VOCs on pig behavior.
| Day 1 | Day 2 | Day 3 | Day 4 | Day 5 | Day 6 | Day 7 | SE | p-value | |
|---|---|---|---|---|---|---|---|---|---|
| Basic behavior (min/hour) | |||||||||
| Feed intake | 4.87 | 4.89 | 4.81 | 4.77 | 4.73 | 4.72 | 4.69 | 0.11 | 0.380 |
| Standing | 6.32 | 6.18 | 6.44 | 6.68 | 6.34 | 6.81 | 6.72 | 0.08 | 0.813 |
| Lying | 44.97 | 45.12 | 44.78 | 44.93 | 45.03 | 45.10 | 44.81 | 0.23 | 0.569 |
| Sitting | 3.84 | 3.81 | 3.97 | 3.62 | 3.90 | 3.37 | 3.78 | 0.06 | 0.411 |
| Singularity behavior (count/hour) | |||||||||
| Drink water | 5.12 | 5.51 | 5.36 | 5.20 | 5.39 | 5.17 | 5.17 | 0.08 | 0.139 |
| Rooting | 1.08 | 1.11 | 1.16 | 1.07 | 1.15 | 1.03 | 1.02 | 0.02 | 0.233 |
| Posture transition (lying-standing) | 3.42 | 3.55 | 3.48 | 3.61 | 3.68 | 3.77 | 3.85 | 0.04 | 0.704 |
| Posture transition (standing-lying) | 3.39 | 3.56 | 3.49 | 3.58 | 3.66 | 3.81 | 3.89 | 0.11 | 0.685 |
| Wallowing | 6.34 | 6.75 | 6.38 | 6.41 | 6.98 | 7.01 | 7.24 | 0.09 | 0.091 |
| Biting | 0.18 | 0.15 | 0.14 | 0.17 | 0.20 | 0.21 | 0.18 | 0.02 | 0.198 |
Six replicate pens per treatment, two pigs per pen.
VOCs, volatile organic compounds; Day 1, VOCs (39.4 ± 1.5 ppb); Day 2, VOCs (60.2 ± 1.4 ppb); Day 3, VOCs (130.4 ± 2.1 ppb); Day 4, VOCs (146.9 ± 4.0 ppb); Day 5, VOCs (272.5 ± 17.4 ppb); Day 6, VOCs (480.5 ± 21.8 ppb); Day 7, VOCs (738.9 ± 29.3 ppb).