| abstract |
PROBLEM TO BE SOLVED: To provide a feed for zooplankton, which contains an ingredient effective for preventing malformation in the production of fish seeds and seeds, and is inexpensive and easy to use. SOLUTION: An oil or fat containing 5% by weight or more of docosapentaenoic acid (C22: 5, n-6) as a constituent fatty acid and / or Alternatively, it is used as a feed for zooplankton using a microorganism as a raw material, thereby preventing the occurrence of malformed fish in seed production. |