<；P>；PROBLEM TO BE SOLVED: To provide a method for measuring the ingestion amount of every fishe individual. <；P>；SOLUTION: The method for measuring the ingestion amount of every fishe individual by making a fish having transparent skin ingest bait dyed with a fluorescent material having an affinity for a cell membrane and measuring the fluorescent amount released from the fish from the outside of the body is disclosed. A method for screening a candidate substance of an ingestion amount-controlling agent by identifying a test substance as the candidate substance of the ingestion amount-controlling agent when the test substance is administered to the fish and the ingestion amount of the fish is measured by the method of the present invention and the ingestion amount is changed in comparison with a case not administering to the test substance is also disclosed. <；P>；COPYRIGHT: (C)2008,JPO&INPIT
