Oxygen consumption and ammonia N-excretion rates of Hyriopsis schlegelii

The oxygen consumption and ammonia N-excretion rates of Hyriopsis schlegelii were studied. The result showed that the oxygen consumption and ammonia N-excretion rates of Hyriopsis schlegelii were positively correlated with water temperature, and negatively correlated with its body weight in optimum temperature conditions. Under the test temperature (9~30℃), the oxygen consumption rate ranged from 2.504 to 6.76 mg/(kg.h),and the ammonia N-excretion rate ranged from 1.963 to 5.689 mg/(kg.h)with the water temperature raising, the oxygen consumption rate and ammonia N-excretion rate reached peak value at 27℃,and began to decrease at 30℃.