Oxygen Consumption and Suffocation Point of Acrossocheilius hemispinus

The oxygen consumption and suffocation point of Acrossocheilius hemispinus were observed on two weight-classes of the fish in a closed fresh watertank with constant circulation. The results showed that the rate ofoxygen consumption and suffocation point of the large sized fish were lower than the small sized counterparts. There was an apparent difference on the oxygen consumptions of the fish during the day and night, as it is termed "circadian rhythm".In that regard, A.hemispinus belonged to the nocturnal type that tended to be more active in the daytime than at night. Based on the information collected, feeding at 9:00-11:00 and 17:00-19:00with sufficient supply of oxygen for the aquaculture was recommended.