Fig. 1

Changes in quantities of food intake (a) and water intake (b), excretion amount (c), and body weight (d) during experimental period. The quantities of food intake, excretion amount, and body weight of the stress rats were less than those of the control rats during the experiment (horizontal dot bars, food F _1,8 = 49.68, P < 0.001; excretion F _1,8 = 45.00, P < 0.001; weight F _1,8 = 28.63, P < 0.001). The quantity of water intake of the stress rats was also less than that of the control rats during the experiment (horizontal dot bar, F _1,8 = 8.31, P < 0.05), although there was no significant difference for each week. Open and closed circles indicate the values of the control and stress rats, respectively. Error bars SD, (n = 12). *P < 0.05 and ^† P < 0.01 compared with the stress rats for each week