Fig. 6. Effect of social status on body growth rate. Values are median ± interquartile range of the average body growth rate from the beginning to the end of the experimental period, expressed as the increase in wet body mass per week in the experiment (g week^–1). (A,B) Body growth rate in the Cell Proliferation Test groups. Body growth rate of animals was not influenced by 7 days (A) or 14 days (B) of social interaction (Kruskal–Wallis test for overall difference: P_7days=0.052, P_14days=0.36). (C,D) Body growth rate in the Cell Survival Test groups. (C) 7 days of social interaction did not alter the body growth rate of animals (Kruskal–Wallis test for overall difference: P=0.72). (D) After 14 days of social interaction, body growth rate was significantly higher for dominant than subordinate animals (Kruskal–Wallis test for overall difference: *P<0.05 (P=0.03); multiple comparisons test: P_IvsD=0.39, P_IvsS=0.065; P_DvsS=0.02).