The Substitution of soybean meal by fermented tofu dregs in the milkfish (Chanos chanos) diet

Abstract

This study aims to investigate the effect of fermented tofu dregs as feed raw material to substitute soybean flour in the milkfish (Chanos chanos) formulated feed. The research was conducted from April to May 2019 at the Ujung Batee Brackish Water Aquaculture Center, Mesjid Raya District, Aceh Besar Indonesia. A total of 200 milkfish (Chanos chanos) fry from 1-2 cm total length were randomly put in a volume of 25 liters per container. Fish were fed at 3 % body weight daily to apparent satiation twice a day (9:00 and 16:00) for 40 days. A completely randomized design (CRD) with 5 treatments and 4 replications was used with different fermented dregs tofu substitution rate ie, 0% (A), 5% (B), 10% (C), 15% (D) and 20% (E). ANOVA test results showed that the substitution of soybean flour with different doses of fermented dregs flour showed significant different (P<0.05) in absolute weight gain, daily growth rate, specific growth rate, feed conversion rate and feed utilization rate. However there was no significant difference (P>0.05) in the survival rate of the fish in all the treatments. It is concluded that the recommended concentration of fermented dregs tofu added into milkfish (Chanos chanos) diet was 10%.