摘要
采用静水呼吸法研究了中华鳑（鱼皮）（1.070±0.068）g在溶氧逐渐降低环境中呼吸耗氧和氮代谢生理水平的变化。结果显示温度在（23.2±0.2）℃时,中华鳑（鱼皮）饱食和饥饿状态下耗氧率分别为0.441 mg/（g·h）和0.297 mg/（g·h）,排氨率分别为1.6μg/（g·h）和0.5μg/（g·h）;溶氧低于1.5 mg/L开始浮头,低于0.31 mg/L开始死亡。当溶氧降低时耗氧率和排氨率均显著降低,但仍表现出一定的昼夜节律性,白天（6：00～14：00时）较夜间（10：00～2：00）高。在低溶氧环境中氨氮、亚硝酸氮浓度逐渐增加,水质环境随时间延长会逐渐恶化。实验结果提示在溶氧逐渐降低的环境胁迫下中华鳑的呼吸作用和氮代谢水平会逐渐下降。因此,在养殖和运输中华鳑（鱼皮）过程中溶氧水平需始终保持在1.5 mg/L以上,运输前停食进行饥饿运输较佳。
The respiration physiology and nitrogen metabolism of Rhodeus sinensis were studied with closed respirometry at（ 23. 2 ± 0. 2） ℃,and under such condition,the dissolved oxygen reduced gradually. The results showed that the oxygen consumption rate（ OCR） and ammonia excretion rate（ AER） of Rhodeus sinensis with satiety and hunger were 0. 441 mg /（ g·h）,0. 297 mg /（ g·h） and 1. 6 μg /（ g·h）,0. 5 μg /（ g·h） respectively. Rhodeus sinensis floated head and died when the dissolved oxygen was less than 1. 5mg / L and 0. 31 mg / L,respectively. OCR and AER reduced significantly as the dissolved oxygen reduced,and then there were diurnal variations in both OCR and AER. Water quality was deteriorating as the dissolved oxygen was reducing,because the ammonia and nitrite increased obviously in aquarium. The present study preliminarily revealed that dissolved oxygen stress would have a significant influence on the respiratory metabolism and nitrogen metabolism of Rhodeus sinensis. So,it was necessary to keep dissolved oxygen above1. 5 mg / L for feeding and transporting of Rhodeus sinensis,and it was a good choice for transporting with hunger.
出处
《上海海洋大学学报》
CAS
CSCD
北大核心
2016年第2期183-188,共6页
Journal of Shanghai Ocean University
基金
江苏省三新工程项目(Y2015-25)
凤凰人才工程(2014020807)
江苏省创新创业项目(20152806008Y)
关键词
中华鳑(鱼皮)
溶氧
呼吸生理
氮代谢
Rhodeus sinensis
oxygen
respiration physiological
nitrogen metabolism
