Mean personality domain scores by genotype for chimpanzees living in Chimpanzee Sanctuary Uto, the sanctuary in Guinea, and the combined sample.

†<p>The combined samples includes 26 subjects from Chimpanzee Sanctuary Uto, 21 subjects from Guinea, and a total of 10 subjects from the Kyoto University Primate Research Institute (<i>n</i> = 5), Higashiyama Zoo (<i>n</i> = 2), Itouzu-no-mori Zoo (<i>n</i> = 1), Kouchi Zoo (<i>n</i> = 1), and Tama Zoo (<i>n</i> = 1).</p

Summary table of the subjects' sex, age, genotype, and personality <i>T</i>-score^†.

<p>Note.</p>†<p><i>Mean</i> = 50 and <i>SD</i> = 10. Dom = Dominance, Ext = Extraversion, Con = Conscientiousness, Agr = Agreeableness, Neu = Neuroticism, Opn = Openness.</p><p>*Other Japanese chimpanzees include 5 subjects from the Kyoto University Primate Research Institute, 2 subjects from the Higashiyama Zoo, 1 chimpanzee from the Itouzu-no-mori Zoo, 1 chimpanzee from the Kouchi Zoo, and 1 chimpanzee from the Tama Zoo.</p

Effect of Tryptophan hydroxylase 2 polymorphism on chimpanzee personality trait: Linear regression analysis with sex and age as the covariates.

<p>Note.</p>†<p>MAF: minor allele frequency.</p><p>*The combined samples includes 26 subjects from Chimpanzee Sanctuary Uto, 21 subjects from Guinea, and a total of 10 subjects from the Kyoto University Primate Research Institute (<i>n</i> = 5), Higashiyama Zoo (<i>n</i> = 2), Itouzu-no-mori Zoo (<i>n</i> = 1), Kouchi Zoo (<i>n</i> = 1), and Tama Zoo (<i>n</i> = 1). Boldfaced values indicate statistically significant effects (<i>p</i><.05). Underlined values indicate trends (<i>p</i><0.1).</p