Table 1.
Melatonin (MLT) concentration in serum, saliva and rumen fluid (pg/mL).
| Item | Time | SEM | P -value | |||||
|---|---|---|---|---|---|---|---|---|
| 02:00 | 06:00 | 10:00 | 14:00 | 18:00 | 22:00 | |||
| Serum | 43.62ab | 39.13abc | 29.75bcd | 20.63d | 22.23cd | 49.32a | 5.895 | <0.001 |
| Saliva | 104.37a | 58.13bc | 59.80bc | 48.56c | 63.95bc | 90.72ab | 10.948 | 0.002 |
| Rumen fluid | 45.49a | 31.38c | 34.45bc | 34.14bc | 35.36bc | 42.64ab | 3.119 | 0.002 |
In the same row, values with no letter or the same letter superscripts mean no significant difference (P > 0.05), whereas with different superscripts mean significant difference (P < 0.05).