Instantaneous Oxygen Consumption Rate and Suffocation Point of Pelteobagrus fulvidraco
黄颡鱼瞬时耗氧率与窒息点的研究

In this experiment,size related instantaneous oxygen consumption rate(IRO2) and suffocation point(Sp) of yellow catfish with body length of 1.90-11.03 cm and body weight of 0.17-22.99 g were investigated by means of sealed-still water at(28.0±0.5)℃.The results showed that the range of Sp and IRO2 was 0.33-0.60 mg/L and 0.0119-0.2081 mg/g·h.respectively,Both Sp and IRO2 of yellow catfish decreased with size increasing,and the power function between Sp and size,and IRO2 and size can be described as Sp=0.7795L-0.3695(R2=0.9619),Sp =0.4897W-0.1323(R2=0.9656) and IRO2=0.7290L-0.5709(R2=0.9580),IRO2 = 0.3549W-0.2036(R2=0.9539),respectively.IRO2 of yellow catfish decreased with decreasing dissolved oxygen(DO) and there was a linear correlations between IRO2 and DO.This study suggests that yellow catfish has low suffocation point and its breath relegates to compliant style.