Mar 01, 2020 · The feeding trial lasted for 56 days in which fish were hand-fed twice at a specific time of day (08:00 and 16:00) at a percentage of wet body weight (4% for 2 weeks and 3% for 6 weeks) which is re-adjusted every two weeks according to the actual fish biomass in the tanks after the batch-weights of the fish. After 3 h of feeding time, uneaten