Oxygen Uptake Due to Specific Dynamic Action of the Carp, Cypronus carpio

Abstract

The intention of the present study is to examine the rule on the oxygen uptake due to specific dynamic action of carp, for the information it may provide on the mechanism of specific dynamic action. The oxygen uptake of fish fed diets was measured continuously. The metabolic rate due to specific dynamic action appeared for 14 to 18 hours at 25°C. The amount of oxygen uptake due to specific dynamic action is composed of a part that is proportional to the ration size and a constant part. The relation between the oxygen uptake due to specific dynamic action (QSDA, ml) and the ration size (x, g) is given by the formula QSDA=α·x+b. Because of this relation, when the ration size is small, oxygen uptake shows changes close to the changes of b, which is higher at 0-2 and 8-10 hours. As the ration size increases, the peak of the rate increases with time, and the whole movement of oxygen uptake becomes dominated by the higher α at 2-8 hours. Also, a is affected by the composition of the diets and is much higher for a high protein diet. The value of a was in the range of 20 to 60 ml·g-1, and the value of b was approximately 50 ml.