International Journal of Tropical Insect Science

Research Paper

Proximate amino acid, fatty acid and mineral composition of two Sudanese edible pentatomid insects

Abdalbasit Adam Marioda1 c1, Siddig Ibrahim Abdel-Wahaba2 and Nooraini Mohd Aina3

a1 Food Science and Technology Department, College of Agricultural Studies, Sudan University of Science and Technology, PO Box 71, Khartoum North, Sudan

a2 Department of Pharmacy, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia

a3 UPM-MAKNA Cancer Research Laboratory, Institute of Bioscience, University Putra Malaysia, Serdang 43400, Selangor, Malaysia

Abstract

The amino acid, fatty acid and mineral composition of Aspongubus viduatus F. (melon bug) and Agonoscelis pubescens (Thunberg) (sorghum bug) were investigated. The approximate analyses of A. viduatus and A. pubescens adults showed 8.3 and 7.6% moisture, 27.0 and 28.2% crude protein, 54.2 and 57.3% fat and 3.5 and 2.5% ash on a dry-matter basis, respectively. The bug protein contained 16 amino acids, including all of the essential ones. Compared with the amino acid profile recommended by FAO/WHO, the protein was of medium quality. The most predominant fatty acids in melon bug oil were oleic, palmitic, linoleic and linolenic acids, viz. 45.5, 31.3, 4.9 and 0.48%, respectively, and in sorghum bug 41.15, 11.41, 35.28 and 1.28%, respectively. The mineral analysis indicated high P and K content. Scanning electron microscopy was used to study ground insect structure before and after oil extraction. Micrographs of full-fat ground insects were different from defatted ones.

(Accepted July 28 2011)

(Online publication September 19 2011)

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