Postprandial Ammonia Excretion and Oxygen Consumption Rates in Olive Flounder Paralichthys olivaceus Fed Two Different Feed Types According to Water Temperature Change

Postprandial ammonia excretion and oxygen consumption in olive flounder Paralichthys olivaceus fed two different feed types, moist pellet (MP) and expanded pellet (EP) diets, to satiation were determined at , , , and for 48 h. The ammonia excretion and oxygen consumption rates increased with increasing water temperature. However, the postprandial times for the maximum rates of ammonia excretion and oxygen consumption were shortened from 12 h to 6 h after feeding with increasing water temperature. The ammonia excretion and oxygen consumption rates of the fish fed EP were significantly higher (P and . The highest (P were observed in the fish fed EP and MP at and , respectively, for 12 h and 9 h after feeding. The highest (P were observed in fish fed EP and MP at and , respectively, for 12 h after feeding. The highest ammonia excretion rates at in the fish fed EP and MP increased to and , respectively, for 6 h after feeding. The highest (P were observed in fish fed EP and MP at and , respectively. These data are valuable for the design of biofilters and development of effluent treatment technologies for the land-based flounder farms.