Fig 2. Average swimming velocity (means ± s. d, n = 6) of grazer species in different plankton systems under three levels of chamber height and three levels of base diameter.

(A) Daphnia magna fed with Scenedesmus quadricauda, (B) Moina micrurafed with S. quadricauda, (C) D. magna fed with Chlorella vulgaris, (D) M. micrura fed with C. vulgaris. Different lowercase letters indicate significant chamber height effect among treatments at a given base diameter. Different upper case letters indicate significant chamber shape effect at a given chamber volume. “*” indicates a significant difference between two treatments at a given chamber height.