The aim of present study was to assess the growth performance and bio-accumulation of metals in Channa marulius and Wallago attu exposed to 1/3rd of LC50 of chromium (Cr) and cadmium (Cd) for 8-week. In both treatments statistically significantly, variable responses viz. wet weight gain (WG), feed intake (FI), feed conversion ratio (FCR) and specific growth rate (SGR) were determined. The control fish (unstressed) had significantly higher WG followed by Cr and Cd test mediums. The FI by C. marulius was significantly higher as 12.83±0.07 g in Cr followed by Cd (12.14±0.05 g) and control (9.57±0.364) medium. However, FI by W. attu was higher in control (15.30±0.40) followed by Cr (13.08±0.06) and Cd (11.98±0.03) exposed mediums. The cumulative FI by W. attu was greater than C .marulius in all treatments. In control, FCR of both species was better significantly than fish reared in Cr and Cd exposed test mediums. In control, SGR of C. marulius and W. attu was noted as 20.50±0.52 and 21.78±0.44, respectively that was significantly better than Cr (13.62±0.09 and 14.02±0.04) and Cd (13.55±0.05 and 13.82±0.04). The comparison between species showed that C. marulius amassed higher concentration of both metals as compared to W. attu. However, Cr accumulates at higher concentration in all organs of both fish species as compared to Cd. The amassment order for metals in both species was studied as kidney>liver>gills>skin>fins>bones>muscle.
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