Table 4. Plasma 1-/3-methyl histidine concentrations of heat-stressed (HS) and pair-fed (PF) cows on day 6 of each period.
| Period | ||||
|---|---|---|---|---|
| Item | Group | P1 1 | P2 1 | P-Value 2 |
| 1-/3-methyl histidine, μmol/L | HSap | 7.7 [5.6; 9.2] a | 12.2 [10.1; 12.8] a | 0.031 |
| PFap | 7.0 [3.5; 10.7] a | 7.8 [6.4; 10.9] b | 0.438 | |
| HSpp | 9.3 [5; 22] c | 11.7 [8.3; 14.5] c | 0.438 | |
| PFpp | 6.4 [4.2; 8.3] c | 9.3 [4.3; 23.2] c | 0.438 | |
ap ante partum; pp post-partum; P1 period of thermoneutral conditions (THI = 59.7) with ad libitum feeding; P2 period of either pair feeding at thermoneutral (THI = 60.0) conditions (PF) or during ad libitum feeding under heat exposure (HS, THI = 76.1).
Numbers of animals analyzed per group: HSap n = 7, PF ap n = 6, HS pp n = 6, PF pp n = 6.
1 Values are given as mean [minimum; maximum].
2 P-Values derived from Wilcoxon signed-rank test for paired samples.
a,bValues with differing superscripts denote group differences within period (column) and ap stage (P < 0.05, based on the exact Mann-Whitney U-test for independent samples).
c,dValues with differing superscripts denote group differences within period (column) and pp stage (P < 0.05, based on the exact Mann-Whitney U-test for independent samples).