Table 1 Daytime (10:00–15:00) and nighttime (22:00–03:00) plasma melatonin concentrations (least square means ± s.e.m.). (N = 82)
From: Plasma Melatonin Levels in Relation to the Light-Dark Cycle and Parental Background in Domestic Pigs
Day | Night | P-value | |
|---|---|---|---|
Melatonin (pg/ml) | 2.7 ± 0.8 | 14.4 ± 0.8 | p < 0.001 |