Efficacy of a fungal fermented product as fishmeal replacement in the diet of Penaeus monodon Fabricius post-larvae
2011
Vijayakumar, M | Joseph, Imelda | Paulraj, R
unknown. The efficacy of diets, formulated by inclusion of an Aspergillus niger fermented product (AFP) as fish meal substitute, forPenaeus monodon post-larvae was determined. AFP was derived by solid state fermentation (SSF) of a mixture of soybeanflour, wheat flour, groundnut oil cake and sesame oil cake in the ratio of 4: 3: 2: 1 respectively for 96 h. The feeding trialwas conducted in post-larvae stocked @10 animals in circular perspex tanks containing 40 l of water with five dietarytreatments each with three replicates for 52 days. The diets containing graded levels of AFP substituting 0, 50, 150, 250and 350 g kg-1 of fishmeal were fed to the post-larvae. Data on the growth performance and nutrient utilization efficiencywere recorded from the feeding trials. Results showed that the post-larval shrimp fed diet containing 150 g kg-1 AFPexhibited significantly better (p<0.05) growth rate (14.79 mg d-1 post-larva-1), feed conversion ratio (1.62), protein efficiencyratio (1.64) and apparent protein utilization (25.39) than the other diets. The diet with 350 g kg-1 AFP showed the bestapparent protein digestibility (87.74 %), apparent fat digestibility (97.95 %) and apparent dry matter digestibility coefficient(77.09 %) among the test diets. The results of the present study suggest that AFP can be used to improve the digestibilityof nutrients and that partial replacement of fishmeal is possible in P. monodon post-larval diets under optimum rearingconditions.
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