Fig. 10. Gross energy content of milk (A), the rate of milk flow (B) and milk energy output (C) in mice exposed to hot (30°C), warm (21°C) and cold (8°C) temperatures. Milk energy content refers to day 15 of lactation. Milk flow and milk energy output are calculated from female water turnover and refer to day 14 of lactation. Bars are means + 1 S.D. (N as in text). Different letters above bars indicate significant differences between the temperatures (P<0.05), as assessed by ANOVA followed by Tukey pairwise comparisons.