| 摘要 |
PROBLEM TO BE SOLVED: To obtain a safe composition for freshness-keeping feed effective for keeping the freshness of meat of cultured fish such as yellowtail during storage without deteriorating the quality of meat product and useful for feed for pisciculture by making the composition include a polyphenol compound, an emulsifier, vitamin E, etc. SOLUTION: The objective composition contains (A) at least one kind of polyphenol compound preferably selected from among (+)catechin, (+)- gallocatechin, (-)-gallocatechin gallate, etc., (B) an emulsifier such as glycerol fatty acid ester, (C) vitamin E and (D) an oil and fat such as rapeseed oil preferably in amounts 1-20 wt.% for the component A, 45-80 wt.% for the component B, 3-20 wt.% for the component C and 10-40 wt.% for the component D. Freshness of fish meat can be maintained during storage by mixing the composition to a feed and supplying the feed to the cultured fish of breeding stage. The amount of the composition to be added to the feed is preferably 0.005-3.0 wt.%. |
