Studies on the development of non-fishmeal/non-fish oil feed for sustainable aquaculture

2022 Fiscal Year Final Research Report

• Project/Area Number: 19H03047
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 40040:Aquatic life science-related
• Research Institution: Fukui Prefectural University (2021-2022); Tokyo University of Marine Science and Technology (2019-2020)
• Principal Investigator: Satoh Shuichi 福井県立大学, 海洋生物資源学部, 教授 (80154053)
• Co-Investigator(Kenkyū-buntansha): 芳賀 穣 東京海洋大学, 学術研究院, 准教授 (00432063) ; 坂本 崇 東京海洋大学, 学術研究院, 教授 (40313390) ; 壁谷 尚樹 東京海洋大学, 学術研究院, 助教 (90758731)
• Project Period (FY): 2019-04-01 – 2023-03-31
• Keywords: 無魚粉飼料 / 無魚油飼料 / シゾキトリユウム / EPA / DHA / 持続可能な養魚飼料

Outline of Final Research Achievements

Basical research for development of non-fish meal/non-fish oil feed for marine fish was conducted to develop the sustainable aquafeed. Marine fish require EPA and/or DHA as essential fatty acids. Therefore, non-fish meal/non-fish oil feed for marine fish was developed by using the dried powder of Schizochitrium which is micro algae rich in DHA. Firstly, a feeding experiment was conducted by using the experimental diet formulated with Schizochitrim powder at the level of DHA requirement. After a feeding trial, identical result was obtained between fish meal/fish oil based diet and non-fish meal/non-fish oil diet with Schizochitrium. A similar kind of experiment was conducted with yellowtail, however, palatability of the diet was too weak to grow. Thefore feed stimulant supplementation improved the feeding activity and resulted a similar growth as fish oil diet.

Free Research Field

魚類栄養学

Academic Significance and Societal Importance of the Research Achievements

世界的に水産養殖が発展し、飼料の重要性が増して来た。そこで、魚類栄養学の持つ意味も非常に重要になった。本研究成果は魚類の脂質要求に関する基礎的・応用的研究であり、海水魚の脂質代謝に関する遺伝子発現情報や微細藻類に含まれる脂質の魚類における利用性を明らかにすることができたのみにかかわらず、海水魚における無魚粉無魚油飼料の開発に成功し、持続可能な水産養殖業を行う為の基礎的知見が得られたものと思われる。