Fig. 3

Comparison of foraging habit. a Small fish (S. taeniatus) b Tough periphytic algae (Spirogyra). (c) Small fish debris. d The FL (foraging level) of small fishes among PP, SW and PS. e The FL (foraging level) of tough periphytic algae among PP, SW and PS. The scale of all figures is 1 mm. The different ** above the boxes differ significantly at P < 0.01 based on Tukey test, the height give the mean, the thick lines give the medians, and whiskers indicate mean ± SE