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KMID : 1011620160320050656
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Korean Journal of Food and Cookey Science
2016 Volume.32 No. 5 p.656 ~ p.663
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Changes in Food Composition of Tenebrio molitor by Life Stage
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Lee Ju-Hye
Lee Ji-Yoon
Hwang Jin-Bong
Nam Jin-Sik
Han Hye-Kyung
Kim So-Min
Im Jeong-Yeon
Choi Young-Min
Kim Haeng-Ran
Kim Se-Na
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Abstract
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Purpose: This study was aimed to compare the nutritional content of the life stages of Tenebrio molitor.
Methods: Nutritional element analysis comprised 12 minerals, 18 amino acids, 4 vitamins, and 12 fatty acids in larval, pupal, and adult stages. Nutritional element content was expressed as a percentage of 100 g of sample and determined in raw and freeze-dried samples to assess the food value of the insect.
Results: Moisture, crude protein, and crude fat contents in raw samples were 63.5%, 23.19%, and 3.96%, respectively. Moisture content was significantly higher in the adult stage than in larval and pupal stages, whereas crude fat and crude ash contents were lower. Mineral composition of the mealworm showed K, P, and Mg in decreasing order of content, with no differences among life stages. Total amino acid content increased from adult, pupal to larval stages, in order with each stage"s growth, without difference in amino acid composition. Seventy-six to 78% of total fatty acid corresponded to unsaturated fatty acids, with oleic acid as the most abundant. In addition, fatty acid content was high in the adult stage, and clear differences were observed between life stages. Finally, vitamins B1 and B3 showed similar content between life stages, whereas vitamin B2 showed a higher content the adult than larval and pupal stages. A higher folate content was observed in pupal and adult stages than in the larval stage. Although freeze-dried samples showed a higher nutritional content than raw samples, both samples were similar in composition and content between life stages, suggesting the suitability of freeze-dried samples for use as food materials.
Conclusion: These results may provide a basis for more diversified industrial applications of the Tenebrio molitor.
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KEYWORD
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Tenebrio molitor, life stage, mineral, vitamin, fatty acid
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