Boxplots showing the weight of native species in different treatment groups under indoor experiment (C1_R, rohu control; T1_R and T2_R are low- and high-Amazon sailfin catfish density treatment on rohu; C2_BC, butter catfish control; T3_BC and T4_BC are low- and high-Amazon sailfin catfish density treatment on butter catfish) over 90 days. Midline within the box is the median; upper and lower limits of the box represent the third and first quartile (75th and 25th percentile) respectively.