Boxplots showing the weight of the native rohu (a) and butter catfish (b) in different treatment groups under pond/mesocosm experiment (T1, Amazon sailfin catfish treatment group) over 180 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. Different letters on the top of the boxplot represent significant difference (p < 0.05; independent t test) between treatments at different time points.