Effects of fasting on standard length (A), body weight (B), condition factor (C), and plasma glucose (D), Gh (E) and Igf1 (F). Tilapia were exposed to continuous feeding (open bars) or fasting (solid bars) and sampled at 7, 14 and 28 days. Significant effects of fasting or interaction between time and fasting are indicated in respective panels. When there was a significant interaction between time and fasting, post-hoc comparisons were made between fed and fasted groups at each time point. *P < 0.05, **P < 0.01 and ***P < 0.001. Means ± SEM (n = 9–10).