Volume 29 Issue 3
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LI Zhi, XIE Xiao-Jun, CAO Zhen-Dong. EFFECT OF FEEDlNG ON OXYGEN CONSUMPTION AND AMMONIA EXCRETION IN SILURUS MERIDIONALIS CHEN[J]. ACTA HYDROBIOLOGICA SINICA, 2005, 29(3): 247-252.
Citation: LI Zhi, XIE Xiao-Jun, CAO Zhen-Dong. EFFECT OF FEEDlNG ON OXYGEN CONSUMPTION AND AMMONIA EXCRETION IN SILURUS MERIDIONALIS CHEN[J]. ACTA HYDROBIOLOGICA SINICA, 2005, 29(3): 247-252.
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EFFECT OF FEEDlNG ON OXYGEN CONSUMPTION AND AMMONIA EXCRETION IN SILURUS MERIDIONALIS CHEN

  • Institute of Fisheries Science, Southwest China Normal University, Chongqing 4007152;
    2. Department of Biology, Chongqing Normal University, Chongqing 400047

  • Received Date: October 19, 2004
  • Rev Recd Date: December 14, 2004
  • Published Date: May 24, 2005
    Graphical Abstract
    • Abstract
  • The postprandial rates of oxygen consumption and ammonia excretion in the southern catfish (Silurus meridionalis Chen)were measured by a continuous2flow respirometer at 27.0±0.5℃The results showed that the standard oxygen consumption rate and ammonia excretion rate were 116.4±6.4 mgO2/kg/h and 6.9 ± 1.4 mgNH4+/kg/h,respectively1The postprandial changing patterns inoxygen consumption and ammonia excretion were similar eachother. After the testedfish ate itsfood the both rates increased drastically,and reached their maximum levels(358.8 ± 11.4 mgO2/kg/h and 76.1±2.5 mgNH4+/kg/h) in a short time(10.8±1.4h and 10.1±0.9 h),then decreased slowly towards to their resting levels1The durationfor the postprandial changes were 36.0±2.3h and 37.2±2.8h;the increased magnitud of oxygen consumption and ammonia excretion were 88.3±2.7 mgO2and 23.1±1.7 mgNH4+ compared with the standards,respectively1This study suggests that response in the rate of ammonia excretion to post2feeding should be relative closely to that in the oxygen consumption1And 79.4 % of energy expenditure for the specific dynamic action(SDA)in postprandial metabolism might be due to protein catabolism in the catfish
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    • References (23)
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