Chemical Evaluation and Nutrient Digestibility of Shrimp Waste Meal in Broilers

Abstract

Shrimp waste meal was evaluated for the proximate principles. 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, 7.0. The calcium and phosphorous content of the SWM was 6.0, 1.2, respectively.  The percent lysine and methionine was 1.66, 0.88, respectively. Metabolizable energy content of SWM was calculated as 1515 kcal/kg diet. An experiment was conducted to study the nutrient utilization in broilers fed SWM at various levels supplemented with or without amino acids as a substitute for fish meal in broiler diets. 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  T_4,  T₅ diets were prepared by adding synthetic lysine and methionine to T₂ and 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  T_4,  T₅ diets were prepared by adding synthetic lysine and methionine to T₂ and T₃  diets. The basal diet T₁ wasused 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 found significantly (P<0.01) higher in birds fed T₄ diet when compared to birds fed other diets T₁, T_2, T₃ and T₅.

The results of the present study conclude that the Protein from FM 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, methionine to improve the utilization of shrimp waste meal protein.