Figure 1. Frequency of micronucleated erythrocytes in C. gariepinus exposed to pharmaceutical effluent. ^∗p<0.05; ^∗∗p< 0.01; ^∗∗∗p< 0.001 are significantly different from the negative control (tap water) using Dunnett's multiple post hoc comparison test. PC= Benzene (0.01 mL/L) positive control, TW= tap water (negative control).