不同温度下青海湖裸鲤的耗氧率、耗氧量与呼吸频率的关系

Correlation between oxygen consumption rate,oxygen consumption and respiratory frequency of Gymnocypris przewalskii under different temperature

研究了不同温度（5±0．5）℃、（10±0．5）℃、（15±0．5）℃、（20±0．5）℃和（25±0．5）℃）下青海湖裸鲤（Gymnocypris przewalskii）的耗氧率、耗氧量与呼吸频率的关系。结果表明，耗氧率、耗氧量和呼吸频率均随着温度的升高而升高，且不同温度间差异显著（P＜0．01）。呼吸频率在5～10℃较低温度时没有明显差异（P＞0．05）。呼吸频率在不同的温度下都存在明显的昼夜差异（P＜0．05），白天明显高于夜晚。不同温度下呼吸频率和耗氧率的回归关系为y＝63．052 e（0．0115x）（R2＝0．9822）；呼吸频率和耗氧量的回归关系为y＝－1．7197 x2＋38．437 x －61．914（R2＝0．9618）。在15～20℃间的耗氧率、耗氧量和呼吸频率相对变化较小，为适宜养殖的水温。

The objective of the study was to explore the relationship between oxygen consumption rate , oxygen consumption and respiratory frequency of Gymnocypris przewalskii .The experiment was studied under five temperature gradients 5 ± 0 .5 ℃ ,10 ± 0 .5 ℃ ,15 ± 0 .5 ℃ ,20 ± 0 .5 ℃ and 25 ± 0 . 5 ℃ .The results showed that oxygen consumption rate ,oxygen consumption and respiratory frequen‐cy increased significantly （P〈0 .01） as temperature rose .The respiratory frequency showed no signifi‐cant difference between 5~10 ℃ that is a relative low temperature （P〉0 .05） .The respiratory fre‐quency was obviously different between day and night （P〈0 .05） ,which showed high during daylight and low during night .The relationship between respiratory frequency and oxygen consumption rate under different temperature could be expressed as y =63 .052 e（0 .0115x） （R2 = 0 .982 2）;the relationship between respiratory frequency and oxygen consumption under different temperature could be ex‐pressed as y= -1 .7197x2 ＋38 .437x -61 .914 （R2 =0 .9618） .In addition ,the rate of oxygen consump‐tion ,oxygen consumption and respiratory frequency was not obviously changed when the water tem‐perature was kept at 15~20 ℃ compared to others .Therefore ,15~20 ℃ was treated as suitable tem‐perature for Gymnocypris przewalskii aquaculture .