Improving Growth Performance of Redtail Catfish (Hemibagrus nemurus) on Low Stocking Density through Monosodium Glutamate Dietary Supplementation

Abstract

This study investigated the different supplementation doses of MSG in diets on growth performance and blood chemistry profiles of redtail catfish under low stocking density condition (10 fish/rearing container). This study applied a completely randomized design with five dietary MSG supplementation dose treatments and four replications, namely 0 g/kg diet (K), 0.5 g/kg diet (M1), 1 g/kg diet (M2), 1.5 g/kg diet (M3), and 2 g/kg diet (M4). The 10 fish (58.70±7.20 g) were stocked in a net cage (2 m × 1 m × 1 m) at 20 m × 10 m pond. Fish were fed with different MSG supplemented diets and reared for 45 days. In growth performance, parameters were composed of, weight gain (WG), feed intake (FI), specific growth rate (SGR), and survival rate (SR). All data were analyzed using a one-way analysis of variance (ANOVA) to determine the significant effect among treatments, then further analyzed using the Duncan's multiple range test (DMRT). Different dosage of MSG dietary supplementation showed a significant difference on each observed parameter. For growth performance, the M3 dose obtained the highest WG (5,133±0,825 g) and SGR (0,187±0,014 %/day), but showed no significant difference with other dose. Also, the K dose showed significant difference with other doses on FI (825,67±10,10 g) and SR (93,33±6,67 %) but SR showed no significant difference with M2, M3, and M4 (90,00±5,77 %, 83,33±8,81 %, 86,67±3,33 %). Therefore, this study concludes a positive effect of 1,5 g/kg diet MSG to improve the growth performance (WG and SGR).

Keywords: Blood, Catfish, Growth, MSG.