Author(s): Wasave SS, Chavan BR, Pawase AS, Shirdhankar MM, Mohite AS, Pai R, Wasave SM and Naik SD

Abstract: An experiment was conducted to find out the effect of locally available carbon sources such as sugar cane molasses (T₁), sugar (T₂), jaggery (T₃), wheat flour (T₄), wheat bran (T₅) and rice bran (T₆) along with control (T₀) on growth performance of GIFT tilapia fry in biofloc systems. The fishes (average initial weight 0.57±0.003 g, average initial length 2.84±0.04 cm) were stocked @250nos. m^-3 in 110L capacity FRP tanks. The experiment was conducted as per completely randomized design with seven treatments and three replicates for 90 days. Results revealed that the water quality parameters were within suitable range for rearing of GIFT tilapia fry. A significantly higher length gain, weight gain (%) and SGR were recorded in fry reared in rice bran biofloc treatments at the end of 30, 60 and 90 days. One-way ANOVA showed no significant difference (P>0.05) between the survival of GIFT tilapia fry in different treatments. A significantly lower AFCR was found in rice bran biofloc treatment than that of control, but not significantly different from other treatments. Overall, results showed the rice bran as a better source of carbon for rearing of GIFT tilapia fry in biofloc systems.

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