中文摘要：

在25℃条件下对不同驱赶时间（0、0.5、1、2.5和5 min）和空气暴露（0、2.5、5、10和20 min）南方鲇（Silurus meridionalis）幼鱼（22.11～79.52 g）恢复过程中的耗氧率（VO）和呼吸频率（Vf）进行了测定。实验发现：经驱赶和空气暴露处理后,实验鱼耗氧率和呼吸频率立即显著上升（P〈0.05）,然后缓慢回落至稳定水平;对于驱赶逆境胁迫,0.5 min处理能诱导最大耗氧率峰值（约170 mg/h）,2.5 min处理能诱导最大运动后过量氧耗（EPOC）（约35 mg）;对于空气暴露逆境胁迫,5 min处理能诱导最大耗氧率峰值（约160 mg/h）,10 min处理能诱导最大EPOC（约20 mg）;无论驱赶还是空气暴露,呼吸频率的反应（上升28%～62%）远小于耗氧率（上升174%～254%）。实验表明两种逆境均能引起明显的胁迫反应,南方鲇对驱赶的反应远大于空气暴露。

英文摘要：

The stress-related respiration response in juvenile southern catfish（22. 11～79.52 g）during the resume process of chase（0, 0. 5, 1, 2. 5 and 5 min）and air exposure（0, 2.5, 5, 10 and 20 min）treatment were examined at 25℃ in this study. The results show that the oxygen consumption rate（ Vo ）and respiration frequency（Vf） increased immediately after chase or air exposure treatment and slowly returned to pre-treatment status. The maximal peak Vo was about 170 mg/h for 0. 5 min chase group and the maximal excess post-chase oxygen consumption（EPOC） was about 35 mg for 2. 5 min chase group. The maximal peak Vo was about 160 mg/h for 5 min air exposure group and the maximal EPOC was about 20 mg for 10 min air exposure group. The Vf（rose 28%～62% ）response to either chase or air exposure stress was much lower than those of Vorose 174%～254% ）. It suggested that the stress response of chase in southern catfish was much larger than that of air exposure.