eng Oriental Scientific Publishing Company Biosciences Biotechnology Research Asia 0973-1245 2016-01-27 3 2 297 306 4592 article A. U. Pagarkar 1 A. Mitra 1 S. Basu 2 Agricultural and Food Engineering Department, Indian Institute of Technology, Kharagpur, (India) Central Institute of Fisheries Education, Versova, Mumbai - 61 (India) Waste product from croaker fish (Otolithes sp.), was eco-friendly utilized by ensiling with lactic acid bacteria (Lactobacilli plantarum), 4% (w/w) sulphuric acid and 4% (w/w) mixture of organic acids (formic acid and propionic acid in 1:1 ratio). These prepared silages were incorporated in juvenile of freshwater prawn Macrobrachium rosenbergii and feeding trials were conducted for a period of 60 days. Three different isonitrogenous diets were prepared with either bio-fermented fish waste silage, and sulphuric acid and mixture of organic acids (formic acid and propionic acid in 1:1 ratio) maintaining crude protein level of diets at 35 %. Biochemical composition, its nutritive evaluation and advantages of bio-fermented fish waste silage comparison with sulphuric acid and mixture of organic acids are discussed in this paper. The juveniles fed diets containing bio-fermented fish waste silage showed not statistically different (P> 0.05), but better weight gains(%), FCR, protein efficiency ratio (PER), feed efficiency ratio FER and net protein utilization than sulphuric acid and mixture of organic acids (formic acid and propionic acid in 1:1 ratio). https://www.biotech-asia.org/vol3no2/an-evaluation-of-the-suitability-of-croaker-fish-otolithes-sp-waste-products-silages-in-feed-macrobrachium-rosenbergii-de-man/ Waste utilization; Macrobrachium rosenbergii; Lactic acid bacteria; bio-fermented silage