Table 4.
Lamb body weight, rectal temperature, and plasma hormone and metabolite concentrations following 48 h in warm or cold environmental chambers for lambs following prenatal exposure to three levels of dietary copper
| Items | Dietary Cu concentration1) | SEM | p-values | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
| ||||||||||
| Low Cu | Medium Cu | High Cu | ||||||||
|
|
|
|
|
|||||||
| Warm | Cold | Warm | Cold | Warm | Cold | Cu | Temp | Cu×Temp | ||
| Body weight (kg) | 4.46 | 4.63 | 4.34 | 4.34 | 4.18 | 4.13 | 0.27 | >0.25 | >0.25 | >0.25 |
| Rectal temperature (°C) | 39.0 | 37.8 | 39.0 | 36.9 | 38.0 | 35.9 | 0.3 | 0.03 | <0.001 | >0.25 |
| Triiodothreonine (ng/dL) | 145 | 251 | 111 | 208 | 103 | 187 | 13 | 0.08 | <0.001 | >0.25 |
| Thyroxine (μg/dL) | 6.18 | 8.77 | 5.99 | 8.58 | 5.77 | 9.56 | 0.38 | >0.25 | >0.25 | >0.25 |
| Cortisol (ng/dL) | 2.58c | 5.18b | 2.14c | 7.59ab | 3.04c | 9.88a | 0.28 | 0.02 | <0.001 | 0.05 |
| Fatty acids (μEq/L) | 457.7 | 244.6 | 403.5 | 267.1 | 504.1 | 263.7 | 22.3 | >0.25 | <0.001 | >0.25 |
| Glucose (mg/dL) | 40.9 | 38.0 | 35.5 | 32.2 | 39.0 | 24.1 | 4.2 | >0.25 | >0.25 | >0.25 |
SEM, standard error of the mean.
1)
Low, medium, and high Cu: 3.2, 10, and 20 ppm Cu (DM basis), respectively; warm, 28°C, cold, 6°C temperature exposure.
a–c
Values within a row with common superscripts do not differ (p>0.05).