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. Author manuscript; available in PMC: 2016 May 1.
Published in final edited form as: Anim Behav. 2015 May 1;103:267–275. doi: 10.1016/j.anbehav.2015.02.012

Figure 2.

Figure 2

Effects of (a) serotonin-related genotype (short vs long allele of the TPH2 polymorphism), (b) age/sex and (c) dominance rank on vigilance behaviour in free-ranging rhesus macaques. In (a) and (c), values are means ± SD. In (b), the shaded area represents the 95% confidence interval. For presentation purposes, a single outlier (14-year-old male with 80% vigilance) has been removed. †P = 0.014 (Tukey post hoc comparison between low- and high-ranking animals); *P <0.03.