Journal of Tianjin Agricultural University ›› 2012, Vol. 19 ›› Issue (3): 4-7.

• Researches and Scientific Notes • Previous Articles     Next Articles

Studies on Oxygen Consumption Rates and Suffocation Points of Three Sizes Pseudobagras ussuriensis

LIU Jin-lan1, CHEN Zhi-wei1, ZHANG Jia-quan2, ZHANG Bo-lun1, DONG Shao-jie1, MIAO Jian-xin2, CHU Wei3, QI Hong-li1,Corresponding Author   

  1. 1. Tianjin Key Laboratory of Aqua-ecology and Aquaculture of Tianjin, Department of Fishery Science, Tianjin Agricultural University, Tianjin 300384, China;
    2. Agricultural Service Center of Jingwu Town, Xiqing District, Tianjin 300382, China;
    3. Tianjin Tianxiang Aquatic Company Limited, Tianjin 301500, China
  • Received:2012-05-16 Online:2012-09-20 Published:2019-11-12

Abstract: The oxygen consumption rates and suffocation points of three sizes Pseudobagras ussuriensis were determined using enclosed device with flowing water. The change of oxygen consumption rate in 24 h was also monitored. The results show that the oxygen consumption rate of large(16.97±1.94 g), medium(1.06±0.06 g)and small size(0.10±0.01 g)were 0.160 8, 0.191 2 and 0.275 0 mg/h·g, respectively, the differences among the three sizes were extremely significant(P<0.01)and their asphyxia points were 0.411 4, 0.571 9 and 0.865 2 mg/L, respectively, the differences among the three sizes were also extremely significant (P<0.01). All peaks of oxygen consumption rate of the three sizes appeared at around 11:00 in the evening. The oxygen consumption rates of large and medium sizes during night (20:00-8:00) were higher consistently and stably than that during day(8:00-18:00), but that of small size did not show regular change. The average oxygen consumption rates of the three sizes during night were higher than that during day.

Key words: Pseudobagras ussuriensis, oxygen consumption rate, suffocation point

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