Fig. 4From: Population variation alters aggression-associated oxytocin and vasopressin expressions in brains of Brandt’s voles in field conditionsEffects of population density (low, moderate and high density) on mRNA expression of AVP/OT a–d and protein expressions of AVP/OT e–h in brain areas of AMYG, MPOA and PVN. Data are shown as mean ± SE. Asterisks indicate significant differences between density groups (*P < 0.05; **P < 0.01; ***P < 0.001)Back to article page