温度及体质量对黄鳝耗氧率和排氨率的影响

Effects of Temperature and Body Mass on Oxygen Consumption Rate and Ammonia Excretion Rate of Monopterus albus

采用静水式研究方法,探讨了不同温度(15、20、25、30、35℃)对7种不同规格黄鳝的耗氧率和排氨率的影响。实验结果表明:温度、体质量对黄鳝的耗氧率和排氨率有显著的影响(P<0.05),但温度和体质量的综合效应对这2个指标没有显著影响(P>0.05);黄鳝的耗氧率(OR)与体质量(W)呈显著的幂函数回归关系OR=aWb。在15～35℃范围内,黄鳝的标准代谢耗氧率变化范围为6～75 mg/(kg·h),耗氧率随温度的升高而升高,随体质量的增加而降低;黄鳝的排氨率变化范围为0.31～6.34 mg/(kg·h),排氨率随温度的升高呈先上升后降低再上升的变化,随体质量的增加而降低。

In lab static water system, the effects of different temperatures （15, 20, 25, 30, and 35 ℃） on the oxygen consumption rate and ammonia excretion rate of Monopterus albus with 7 different body masses were explored. The experimental results showed that both temperature and body mass had a significant effect on the oxygen consumption rate and ammonia excretion rate of M. albus （ P 〈0.05）, but their combined effect on these two indexes was not significant （ P 〉0.05）. The relationship between the oxygen consumption rate （ OR ） and body mass （ W ） of M. albus could be expressed by power function OR=aW b , and the regression coefficient reached a significant level. Within the range of 15-35 ℃, the oxygen consumption rate in standard metabolism of M. albus varied from 6 mg/（kg·h） to 75 mg/（kg·h）, and it increased with the increase in temperature, and decreased with the increase in body mass; the ammonia excretion rate of M. albus varied from 0.31 mg/（kg·h） to 6.34 mg/（kg·h）, and it increased first, then decreased, and finally increased again with the increase in temperature, and decreased with the increased in body mass.