Vol. 12, Issue 4 (2023)

Author(s):
SR Surnar, Abhinika Jain, ML Ojha, TI Chanu and VP Saini

Abstract:
In the present study, the effect of different background colour of hatching tubs on larval growth and survival of magur, Clarias magur were investigated. The significant results showed that the length, Body weight gain, percentage weight gain, specific growth rate and protein efficiency ratio was significantly affected by background of tubs colour, which was higher in the T₃ (black colour tubs) than that of the tubs (p<0.05). The highest feed intake was observed in magur larvae reared in the T₃ (black colour tubs), followed by that of the T₂ (blue colour tubs) and the lowest was in fish in the T₁ (white colour tubs). The lowest feed conversion ratio was found in Black followed by blue and highest in white colour tubs was significantly difference (p<0.05) between each other. The tubs colour did not significantly affect survival among all the treatments (p>0.05) by the tubs that had background colour with highest survival in the (T₃) black tubs (100±0.00) and (T₁) white tubs (100±0.00) in hatching tub up to 10 dph and (98.04±1.96) in rearing system up to experimental period. In conclusion, the black colour tubs was optimum for rearing Clarias magur larvae based on the growth and survival performance.