Figure 2

Plasma concentrations, at the end of each session (S1 = 1st session, S2 = 2nd session) of the behavioural tests, of cortisol (upper strip), prolactin (second strip), DHEA (third strip), and BDNF (lower strip) in sheep carrying the Calm A/A (white bar) or the Nervous G/G (black bar) genotype for SNP rs107856856, and in sheep that were phenotypically classified as low responder (grey bar) or of high responder (dark grey bar) in two sessions (S1 = 1st session, S2 = 2nd sesision) of the behavioural tests. Data are shown as mean ± SE. * indicates a statistical difference P < 0.05.