Why do tasty diets promote good growth?

• Project/Area Number: 18K05822
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 40040:Aquatic life science-related
• Research Institution: Kochi University
• Principal Investigator: Masumoto Toshiro 高知大学, 教育研究部自然科学系農学部門, 教授 (10238917)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Project Status: Completed (Fiscal Year 2020)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: 栄養飼料 / 栄養生化学 / 消化生理 / 植物原料 / 養殖 / ブリ / 味覚刺激 / 嗅覚刺激 / 養魚 / 低魚粉 / 消化機能 / 魚類

Outline of Final Research Achievements

For sustainable aquaculture, it is essential to reduce finite fish meal and feed using plant materials, but the growth of fish (yellowtail) fed with such feed is reduced. Therefore, in this study, we focused on the highly palatable odor stimulus derived from fish meal and investigated the effect of the odor stimulus on the digestive process. Yellowtail juvenile caused active swimming behavior and increased oxygen consumption only by odor stimulation of fish meal-derived extract and commercially available palatable substances. Stomach relaxation was observed due to the odor stimulation of the fish meal extract, which was more effective, and the amount of gastric juice secreted was also increasing. The regulation of these digestive processes was investigated by nerves with a heart rate logger inserted into the abdominal cavity, it was found that difficult to judge from the heart rate measurement in this study, and a more detailed examination was required.

Academic Significance and Societal Importance of the Research Achievements

有限な魚粉含量を削減して植物原料を用いた飼料が不可欠だが、このような飼料を与えた魚（ブリ）では成長が低下する。本研究の結果、魚粉に含まれるブリの嗅覚を刺激する成分を植物飼料に添加すると、胃の消化機能を亢進し、この成分を飼育水に滴下するだけでも消化機能の一部が促すことがわかった。このような嗅覚を刺激する成分を植物飼料に添加することで、ブリの摂餌量の増加と消化機能が向上し、植物飼料を摂取したブリの成長低下を抑制できブリ養殖の安定化に貢献できると考えられる。

Research Products

• [Journal Article] Effect of dietary moisture content on growth and feed intake in conger eel Conger myriaster (2021)
  • Author(s): Wastu Ayu Diamahesa, Haruhisa Fukada and Toshiro Masumoto
  • Journal Title: Aquaculture Science Volume: 69 Pages: 71-77
  • NAID: 40022573697
  • Peer Reviewed
• [Journal Article] Effects of a soybean lecithin-supplemented mealworm-containing diet on the growth performance and lipid utilization of common carp (Cyprinus carpio L.) (2021)
  • Author(s): Kakeru Iwai, Wastu Ayu Diamahesa, Haruhisa Fukada and Toshiro Masumoto3,
  • Journal Title: Aquaculture Science Volume: 69 Pages: 79-86
  • NAID: 40022572945
  • Peer Reviewed
• [Journal Article] Effects of natural feeding stimulants and glutamic acid supplementation on the feed intake, growth performance and digestive enzyme activities of red sea bream ( Pagrus major ) fed fish meal‐free soy protein concentrate (SPC)‐based diet (2019)
  • Author(s): Tola Siriporn、Fukada Haruhisa、Masumoto Toshiro
  • Journal Title: Aquaculture Research Volume: 1 Issue: 7 Pages: 1-9
  • DOI: 10.1111/are.14077
  • Peer Reviewed / Int'l Joint Research
• [Book] ブリの科学 (2019)
  • Author(s): 虫明敬一 編著
  • Total Pages: 212
  • Publisher: 朝倉書店
  • ISBN: 9784254485011