Table 3. The mean concentrations of oxytocin and serotonin in horse blood plasma for different degrees of dominance in horses

Neurotransmitters Degree of dominance
Low (n = 9) Medium (n = 17) High (n = 3)
OXT (pg/mL) 47.86 ± 2.78 44.19 ± 1.76 38.89 ± 3.94
5-HT (ng/mL) 98.81 ± 6.95a 93.54 ± 3.97a 58.96 ± 12.08b
Means in the same row with different letters are significantly different (p < 0.05).