Development of a novel aquaculture feed using gelatinous zooplankton as the material

2018 Fiscal Year Final Research Report

• Project/Area Number: 17K15310
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Aquatic bioproduction science
• Research Institution: Hiroshima University
• Principal Investigator: Wakabayashi Kaori 広島大学, 生物圏科学研究科, 助教 (20725147)
• Project Period (FY): 2017-04-01 – 2019-03-31
• Keywords: 未利用資源 / 動物プランクトン / 十脚類幼生 / 摂餌生態

Outline of Final Research Achievements

Towards the use of gelatinous zooplankton for aquaculture feed materials, nutritional values of jellyfish and combjelly were evaluated by feeding them with slipper lobster larvae which are known to prey on gelatinous zooplankton in the wild. In the present study, it is clarified that slipper lobster larvae are capable of developing with preying on combjelly as well as cnidarian jellyfish. It was also confirmed that slipper lobster larvae preyed on the artificially formulated diet containing jellyfish and combjelly as materials. Dye added to visualize the movement of diet-derived particles was found in the midgut gland of slipper lobster larvae. However, continuous rearing of larvae with feeding only on the formulated diet has not been achieved yet.

Free Research Field

水圏生産科学

Academic Significance and Societal Importance of the Research Achievements

世界各地の沿岸域では、近年、クラゲ類やクシクラゲ類が長期的かつ多発的に集団で出現している。これらの大量出現は、沿岸域での産業活動の停滞を招く。たとえば、発電所付近に集まって取水口の目詰まりを引き起こす。また、定置網や底曳き網などに入り込んで、漁業に甚大な被害をもたらす。一方、大量のゼラチン質動物プランクトンはそれ自体を資源とみなすこともでき、食品、化粧品、医薬品、研究試薬などとしての利用が期待されている。本成果は、ゼラチン質動物プランクトンの水産分野での利用開発に貢献するものである。様々な水産有用魚介類がクラゲ類を好んで食べることが知られているので、将来の増養殖技術向上への貢献も期待される。