Chemical Evaluation and Nutrient Digestibility of Shrimp Waste Meal in Broilers

Abstract

This experiment was conducted to study the nutrient utilization in broilers fed shrimp waste meal (SWM) at various levels supplemented with or without amino acids as a substitute for fish meal in broiler diets. The percent dry matter, crude protein, ether extract, crude fibre, total ash, nitrogen free extract of shrimp waste meal (SWM) were 94.17, 50.5, 8.2, 15.2, 19.1, and 7.0, respectively. The calcium and phosphorous content of the SWM was 6.0, and 1.2%, respectively. The percent lysine and methionine were 1.66, and 0.88, respectively. Metabolizable energy content of SWM was calculated as 1515 kcal/kg diet. The experimental diets in pre-starter phase were prepared by replacing fish meal protein of the basal diet with the shrimp waste meal protein at 20% level (T2), 30% level (T3); and T4 T5 diets were prepared by adding synthetic lysine and methionine to Tand T3 diets. In starter and finisher phases, five experimental diets were prepared by replacing fish meal protein of the basal diet with the shrimp waste meal protein at 50% level (T2), 100% level (T3); and T4 T5 diets were prepared by adding synthetic lysine and methionine to T2 and T3 diets. The basal diet T1 was used as control containing maize, SBM, DORB and 10% fish meal. All diets were iso-nitrogenous and iso-caloric. Metabolism trials were conducted to study the digestibility of nutrients during starter (0–28 days) and finisher (29–42 days) phases. The nutrient digestibility of DM and CF was found to be non-significant among treatments during starter and finisher phase. However, during starter and finisher phases CP and EE digestibilities were significantly (P<0.01) higher in birds fed T4 diet when compared to birds fed other diets (T1, T2 T3 and T5). The results of the present study conclude that the protein from fishmeal can be safely substituted up to 30% with the SWM protein in pre-starter and up to 50% in starter and finisher broiler diets along with the supplementation of synthetic lysine and methionine.