A Novel Strategy for the Production of Edible Insects: Effect of Dietary Perilla Seed Supplementation on Nutritional Composition, Growth Performance, Lipid Metabolism, and Δ6 Desaturase Gene Expression of Sago Palm Weevil ( Rhynchophorus ferrugineus ) Larvae

• Published in: Foods Vol. 11; no. 14; p. 2036
• Main Authors: Chinarak, Khanittha, Panpipat, Worawan, Panya, Atikorn, Phonsatta, Natthaporn, Cheong, Ling-Zhi, Chaijan, Manat
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 09.07.2022; MDPI
• Subjects: Amino acids; Biometrics; Desaturase; Diet; Dietary supplements; Enzymes; Farms; Fatty acids; Feeds; Food science; Food security; Gene expression; growth performance; insect; Insects; Larvae; Linoleic acid; Lipid metabolism; Lipids; Metabolism; Metabolites; Nutrient content; nutritional value; Nutritive value; Performance indices; perilla seed; Proteins; Rhynchophorus ferrugineus; Sago; sago palm weevil larvae; Soybeans; Thailand; insect; nutritional value; growth performance; perilla seed; lipid metabolism; sago palm weevil larvae
• ISSN: 2304-8158; 2304-8158
• DOI: 10.3390/foods11142036

The nutritional value, growth performance, and lipid metabolism of sago palm weevil larvae (Rhynchophorus ferrugineus, SPWL) raised on plant-based diets (soybean, rice bran, and ground sago palm trunk (GSPT)), supplemented with various concentrations (0, 3, 7, 15, and 20%) of perilla seed (PS) were compared with traditional diets i.e., regular GSPT (control) and GSPT supplemented with pig feed. All supplemented diets rendered SPWL with higher lipid and protein contents (p < 0.05). Supplementing with 7−20% PS enhanced α-linoleic acid content in SPWL, resulting in a decrease in the n-6:n-3 ratio to a desirable level. Dietary PS supplementation increased Δ9 (18), total Δ9 and Δ5 + Δ6 desaturase indexes, fatty acid (FA) unsaturation, and the polyunsaturated FA:saturated FA ratio in SPWL, while lowering atherogenicity index, thrombogenicity index, and Δ6 desaturase (fads2) gene expression. Boosting with 7% PS improved the majority of growth parameters and enhanced essential amino acid and mineral contents (p < 0.05).