Olaitan Olajuyigbe
Nigerian Institute for Oceanography and Marine Research, Nigeria.
Title: Fermentation of shrimp (Penaeus Notialis) waste for use as supplement in fish feed formulation
Biography
Biography: Olaitan Olajuyigbe
Abstract
The uncontrolled dumping of shrimp waste (SW) into waterways results in environmental pollution. The bio-conversion of SW into Value-Added Products (VAP) would reduce environmental pollution and provide some economic benefits. This study was designed to convert SW into VAP utilisable as a replacement for fishmeal in fishfeed formulation. SW was collected from processors at Ijora market in Lagos, Nigeria. Bacteria and fungi were isolated from the SW, Solid state fermentation of SW was carried Bacillus subtilis (B42). Six diets (D1-D6) were compounded using 0, 10, 25, 50, 75 and 100% of Bacteria Fermented Shrimp Waste (BFSW) as a replacement for fishmeal. The diets were fed to Clarias gariepinus fingerlings (11.1±0.2g) at 20 fingerlings/ treatment in three replicates, using a completely randomised design. Weight Gain (WG), Survival Rate (SR), and Feed Conversion Ratio (FCR) were recorded fortnightly. Haematological Index (HI) and feed cost analysis were evaluated at the end of the experiment. Data were analysed using descriptive statistics and ANOVA at p = 0.05. The highest WG (71.9±1.1 g) was obtained for fish group fed D2. There were no significant differences among the FCR of fish fed D1-D4 (1.3-2.0), the diets had no significant influence on SR and HI of the fingerlings. D3 (25% BFSW) had the least cost of production ($1.39/kg), the highest profit index (2.7), and net profit ($2.19/kg) . Fermentation of shrimp waste with Bacillus subtilis (B42) was effective in its conversion to VAP suitable for use as an alternative to fishmeal in fishfeed formulation.