Table 2.
Effects of early life thermal stress on pig posture and consumption behaviors for 7 d post-simulated transport and heat stress exposure
| Parameter | Environmental treatment | SEM | P | ||||||
|---|---|---|---|---|---|---|---|---|---|
| ELTN* | ELHS† | ELCS‡ | E§ | D¶ | E × D | Contrast 1║ | Contrast 2@ | ||
| Posture | |||||||||
| 0900–0800 h | |||||||||
| Lying, % | 82.9 | 81.3 | 83.6 | 0.5 | 0.23 | 0.01 | 0.51 | 0.10 | 0.69 |
| Standing, % | 16.2 | 17.2 | 15.3 | 0.5 | 0.41 | 0.01 | 0.57 | 0.24 | 0.98 |
| Sitting, % | 0.9 | 1.4 | 1.0 | 0.1 | 0.15 | 0.60 | 0.56 | 0.06 | 0.20 |
| 0900–2000 h | |||||||||
| Lying, % | 77.4 | 76.8 | 79.4 | 0.5 | 0.41 | 0.01 | 0.13 | 0.35 | 0.72 |
| Standing, % | 21.1 | 21.6 | 19.2 | 0.5 | 0.47 | 0.01 | 0.14 | 0.38 | 0.74 |
| Sitting, % | 1.5 | 1.6 | 1.4 | 0.1 | 0.92 | 0.11 | 0.74 | 0.69 | 0.92 |
| 2000–0800 h | |||||||||
| Lying, % | 87.9 | 85.6 | 87.5 | 0.4 | 0.35 | 0.01 | 0.05 | 0.16 | 0.31 |
| Standing, % | 11.7 | 13.1 | 11.8 | 0.4 | 0.68 | 0.01 | 0.14 | 0.38 | 0.57 |
| Sitting, % | 0.3a | 1.3b | 0.6a | 0.1 | 0.01 | 0.07 | 0.11 | 0.01 | 0.03 |
| Consumption | |||||||||
| 0900–0800 h | |||||||||
| Feeding, %# | 8.8 | 8.7 | 8.0 | 0.3 | 0.56 | 0.01 | 0.58 | 0.66 | 0.52 |
| Drinking, %$ | 1.6 | 1.6 | 1.4 | 0.1 | 0.67 | 0.08 | 0.49 | 0.66 | 0.65 |
| Other, %^ | 89.6 | 89.7 | 90.6 | 0.4 | 0.44 | 0.01 | 0.34 | 0.54 | 0.48 |
| 0900–2000 h | |||||||||
| Feeding, % | 10.9 | 10.2 | 9.1 | 0.3 | 0.24 | 0.01 | 0.26 | 0.80 | 0.18 |
| Drinking, % | 2.2 | 2.1 | 2.0 | 0.1 | 0.89 | 0.21 | 0.83 | 0.90 | 0.74 |
| Other, % | 86.9 | 87.7 | 88.9 | 0.3 | 0.20 | 0.01 | 0.22 | 0.75 | 0.16 |
| 2000–0800 h | |||||||||
| Feeding, % | 6.9 | 7.4 | 6.9 | 0.3 | 0.91 | 0.01 | 0.73 | 0.67 | 0.78 |
| Drinking, % | 1.0 | 1.0 | 0.9 | 0.1 | 0.69 | 0.21 | 0.14 | 0.57 | 0.77 |
| Other, % | 92.1 | 91.6 | 92.2 | 0.3 | 0.92 | 0.01 | 0.25 | 0.68 | 0.80 |
| Latency to feed, min:s& | 3:10 | 4:06 | 5:14 | 1:16 | 0.41 | - | - | 0.94 | 0.30 |
| Latency to drink, min:s+ | 1:05 | 1:06 | 1:30 | 0:20 | 0.60 | - | - | 0.65 | 0.58 |
*Pigs exposed to early life thermoneutral conditions on d 7, 8, and 9 post-farrowing.
†Pigs exposed to early life heat stress conditions on d 7, 8, and 9 post-farrowing.
‡Pigs exposed to early life cold stress conditions on d 7, 8, and 9 post-farrowing.
§Environmental treatment.
¶Day.
║Early life heat stress vs. early life thermoneutral or early life cold stress conditions.
@Early life thermoneutral vs. early life heat stress or early life cold stress conditions.
#Head in feeder.
$Snout in contact with waterer.
^Anything other than head in feeder or snout in contact with waterer.
&Time to first head in feeder behavior following simulated transport.
+Time to first snout in contact with waterer behavior following simulated transport.
a,bLetters indicate significant differences (P ≤ 0.05) within a row.