急性低温胁迫对南方鲇和瓦氏黄颡鱼耗氧率和呼吸频率的影响

目的]为了研究急性低温胁迫对南方鲇和瓦氏黄颡鱼耗氧率和呼吸频率的影响。方法]于24℃条件下测定南方鲇和瓦氏黄颡鱼经过不同温度(24、18、12、6、0℃)10 min低温胁迫后耗氧率(VO2)和呼吸频率(Vf)的恢复过程。结果]结果表明:南方鲇在6、0℃胁迫后VO2和Vf表现为先下降、后上升然后缓慢回落的过程,其余组表现为先迅速上升然后缓慢回落的过程;瓦氏黄颡鱼只有0℃表现为先下降、后上升然后缓慢回落的过程,其余组表现为先迅速上升然后缓慢回落的过程。结论]瓦氏黄颡鱼对急性低温胁迫抵抗力更高,但同样的低温胁迫瓦氏黄颡鱼需要消耗更多的能量。该研究为生产实践提供了基础数据。

Effect of Acute Low Temperature Stress on Oxygen Consumption Pate and Ventilation Frequency in Silurus meridionalis and Pelteobag vachelli

The objective of the study was to explore the effect of acute low temperature stress on VO2 and Vf of Silurus meridionalis and Pelteobag vachelli after 10 minutes cold water bath with different temperature were investigated at 24 ℃.It was found that the VO2 and Vf of Silurus meridionalis after 6 and 0 ℃ stress showed a decrease-increase-decrease tendency while other groups showed an increased then slowly recovery process.The VO2 and Vf of Pelteobag vachelli after 0 ℃ stress showed a decrease-increase-decrease tendency while other groups showed an increased then slowly recovery process.It suggested Pelteobag vachelli was more adaptive to acute cold stress,but it cost more energy when meeting cold stress compared to Silurus meridionalis.