1997 Volume 45 Issue 1 Pages 81-86
The rates of oxygen consumption and ammonia excretion after feeding of the Japanese flounder Paralichthys olivaceus were measured over a 24-hour period for a group fed once at 09: 00 hours and a group fed once at 18: 00 hours. The specific dynamic action (SDA) magnitudes of the two groups after feeding were not significantly different, but they showed different patterns during the experimental period. The peak level of oxygen consumption for the group fed at 18: 00 hours was 24.5 % higher than that of the group fed at 09: 00 hours. There were no significant differences between either the peak ammonia excretion rate for each group or between the mean ammonia excretion rate for each group. A single peak in ammonia excretion occurred 3-6 hours after feeding for both groups during the 24-hour experimental period. The rate of ammonia excretion returned to the pre-feeding level approximately 24 hours after feeding.
