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. Author manuscript; available in PMC: 2018 Nov 1.
Published in final edited form as: Addict Biol. 2016 Aug 3;22(6):1655–1664. doi: 10.1111/adb.12428

Fig 1.

Fig 1

CSF levels of 5-HIAA and Sex Interact to Predict Aggression Toward an Intruder Macaque. Rhesus macaques were exposed in the home run to an age- and sex-matched intruder. Effects of OPRM1 genotype (C/C vs. G allele carrier) on aggressive response factors were assessed using ANOVA, with 5-HIAA and sex as a co-variables. A. Males exhibited higher levels of aggression, but there were no effects of genotype or genotype × sex interactions. B. Males with low 5-HIAA exhibited higher levels of aggression toward an unfamiliar conspecific.