Nutrient composition, amino acid and fatty acid profiles, and mineral content of silkworm (Bombyx mori L.) pupa powder to be used as a feed ingredient in poultry diets

Abstract

The aim of this study was to determine the nutrient composition, amino acid and fatty acid profiles, and mineral content of silkworm (Bombyx mori L.) pupa powder (SPP) that can be used as a feed ingredient in poultry diets. In this study, the dry matter, organic matter, crude protein (CP), ether extract (EE), crude fiber, and ash contents, amino acid and fatty acid profiles, and the contents of some minerals of SPP dried until they reached a constant weight at 130 degrees C for 12 hours were determined. In addition, color characteristics (L*, a*, and b* values) were also determined. The CP, EE, and ash contents of SPP were determined to be %58.8 +/- 0.39, %20.8 +/- 0.93, and 5.9 +/- 0.04, respectively, on a dry matter basis. The most abundant amino acids were arginine (35.4 +/- 3.26 mg/g), aspartic acid (40.2 +/- 3.64 mg/g), glycine and serine (43.1 +/- 3.38 mg/g) in SPP. The total saturated, monounsaturated (MUFA), and polyunsaturated (PUFA) fatty acids were found to be 26.7 +/- 0.05, 31.2 +/- 0.08, and 42.0 +/- 0.05, respectively. oleic acid, and alpha-linolenic acid were found as abundant fatty acids in silkworm pupa powder. The potassium, phosphorus, magnesium, and calcium contents of SPP were 83.9 +/- 0 .6 +/-, 63.4 +/- 1.8, 26.2 +/- 0.3, and 9.8 +/- 0.5, respectively. These findings clearly show that SPP is a potential protein source that can be used in poultry nutrition.