抗菌剤使用の制限意識が高まる養豚におけるキトオリゴ糖の活用
― 腸内環境の制御を中心に ―

押田明則, 大貫勝彦
株式会社フロンティアインターナショナル, 神奈川県川崎市麻生区, 215-0025

要約
薬剤耐性菌の対策として抗菌剤の使用制限が提唱されるようになり、代替品として検討されたキトオリゴ糖(以下、COS)について話題提供した。COSの作用を検証するために行われた様々な抗菌剤との比較試験ではそれらの機序は異なるものの、結果として、十二指腸から回腸までの間で絨毛の発達を促進したり、微生物叢を好ましい状態にするなどの腸内環境を改善し、その作用は抗菌剤と同等の影響力を有するとしていることからCOSは抗菌剤の代替品として利用可能と考えられ、その適正な飼料中の濃度は 200〜600 mg/kg飼料の範囲と考えられた。

キーワード: キトオリゴ糖、養豚

受領日: 18.06.2024. 受理日: 01.08.2024.
Journal of Animal Production Environment Science

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Changes in chemical composition during the metamorphosis stages of Tenebrio molitor

Maho Yamanaka¹, Sachika Okuno², Toshinori Nakagawa³, Katsuyoshi Sato¹, Jun Watanabe⁴, Masaki Yokoo¹, Takuji Hirayama²
1 Faculty of Bioresource Sciences, Akita Prefectural University, 2-2 Aza Minami Ogata-mura, Minamiakita-gun, Akita 010-0444
2 School of Bioresources and Environmental Science, Ishikawa Prefectural University, 1-308 Suematsu, Nonoichi City, Ishikawa 921-8836
3 School of Environmental Science, University of Shiga Prefecture, Hikone, Shiga 522-8533
4 Agri-Innovation Education and Research Center, Akita Prefectural University, 6-5 Aza Ogata Ogata-mura, Minamiakita-gun, Akita 010-0451

Abstract
Abstract In recent years, the demand for alternative proteins has increased with the growth of the global population. Tenebrio molitor (T. molitor) larvae have been widely used as feed for pets, zoo animals, and livestock. It has four life stages: egg, larva, pupa, and adult. T. molitor is often fed as a larva, but it can also be fed as a pupa or adult as feed for large reptiles and birds. In this study, we investigated the chemical composition of T. molitor at different metamorphosis stages. The test samples were T. molitor larvae, pupae, and adults, and three groups of 20 individuals per group were used at each metamorphosis stage. We measured moisture, crude protein, nitrogen free extracts, crude ash, ether extracts, and fatty acid contents in T. molitor at each metamorphosis stage. Moisture and crude protein contents were significantly lower in larvae than in pupae and adults. Ether extracts and nitrogen free extracts contents were significantly higher in larvae than in pupae and adults. Unsaturated fatty acid content was significantly different between all metamorphosis stages (P <0.01). The pupa was the highest, followed by the larvae and adults. These results suggest that the chemical components of T. molitor change during metamorphosis.

Keywords: Fatty acid, Mealworm, Metamorphosis stage, Chemical composition, Tenebrio molitor

Receipt of Ms: 09.05.2024. Accepted: 27.06.2024.
Journal of Animal Production Environment Science

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