The effect of use of tofu dregs fermented on feed efficiency and growth of African cat fish (Clarias gariepinus)

Abstract

The aims of research were to investigate the effect of tofu dregs fermented utilization on feed efficiency and growth of African catfish (Clarias gariepinus). This research consists of two experimental stages. Preliminary experiments were performed to determine the optimal bioactivator dosage to ferment the tofu dregs. The result showed that optimal bioactivator used to ferment tofu dregs was 60 ml kg−1. The main experiment was carried out for 45 days using triplicate set up of fiveteen rectangular plastic tanks. Twenty five fingerling African catfish with a mean total body length of 10 ± 0,1 cm were stocking in the plastic tanks. The experimental fishes were fed twice daily at satiation. Five fish feed (Diet K was the control diet, Diet A contained 10 percent, Diet B contained 20 percent, Diet C contained 30 percent, and Diet D contained 40 percent tofu dregs fermented, respectively) were used in feeding the fish. Growth performances and diet nutrient utilization were analysed using the specific growth rate (SGR) and feed efficiency (FE). Data obtained from the experiment were subjected to one-way analysis of variance. Duncan’s multiple Range Test was performed using to determine differences between treatment at significance rate of P < 0.05. In conclusion, the results showed that the utilization of tofu dregs fermented had significant effect on feed efficiency and growth of African catfish. Further, the present experiment showed that tofu dregs fermented could be utilized in diets up to 40 percent.