Pirozzi Igor, Booth Mark A
NSW Department of Primary Industries and Aquafin Cooperative Research Centre, Port Stephens Fisheries Institute, Taylors Beach, NSW 2316, Australia.
Comp Biochem Physiol A Mol Integr Physiol. 2009 Apr;152(4):586-92. doi: 10.1016/j.cbpa.2009.01.008.
This study compared the mass-specific routine metabolic rate (RMR) of similar sized mulloway (Argyrosomus japonicus), a sedentary species, and yellowtail kingfish (Seriola lalandi), a highly active species, acclimated at one of several temperatures ranging from 10-35 degrees C. Respirometry was carried out in an open-top static system and RMR corrected for seawater-atmosphere O2 exchange using mass-balance equations. For both species RMR increased linearly with increasing temperature (T). RMR for mulloway was 5.78T-29.0 mg O2 kg(-0.8) h(-1) and for yellowtail kingfish was 12.11T-39.40 mg O2 kg(-0.8) h(-1). The factorial difference in RMR between mulloway and yellowtail kingfish ranged from 2.8 to 2.2 depending on temperature. The energetic cost of routine activity can be described as a function of temperature for mulloway as 1.93T-9.68 kJ kg(-0.8) day(-1) and for yellowtail kingfish as 4.04T-13.14 kJ kg(-0.8) day(-1). Over the full range of temperatures tested Q10 values were approximately 2 for both species while Q10 responses at each temperature increment varied considerably with mulloway and yellowtail kingfish displaying thermosensitivities indicative of each species respective niche habitat. RMR for mulloway was least thermally dependent at 28.5 degrees C and for yellowtail kingfish at 22.8 degrees C. Activation energies (Ea) calculated from Arrhenius plots were not significantly different between mulloway (47.6 kJ mol(-1) and yellowtail kingfish (44.1 kJ mol(-1).
本研究比较了体型相似的定居性物种——斑尾鲈（Argyrosomus japonicus）和高度活跃的物种——黄尾鰤（Seriola lalandi）在10至35摄氏度的几种温度之一驯化后的单位质量常规代谢率（RMR）。呼吸测定在开放式静态系统中进行，并且使用质量平衡方程对海水 - 大气氧气交换进行校正后得到RMR。对于这两个物种，RMR均随温度（T）升高呈线性增加。斑尾鲈的RMR为5.78T - 29.0毫克氧气·千克^(-0.8)·小时^(-1)，黄尾鰤的RMR为12.11T - 39.40毫克氧气·千克^(-0.8)·小时^(-1)。斑尾鲈和黄尾鰤之间RMR的阶乘差异根据温度在2.8至2.2之间变化。斑尾鲈常规活动的能量消耗可描述为温度的函数，即1.93T - 9.68千焦·千克^(-0.8)·天^(-1)，黄尾鰤为4.04T - 13.14千焦·千克^(-0.8)·天^(-1)。在测试的整个温度范围内，两个物种的Q10值均约为2，而在每个温度增量下的Q10响应随斑尾鲈和黄尾鰤表现出的热敏感性有很大差异，这表明了每个物种各自的生态位栖息地。斑尾鲈的RMR在28.5摄氏度时热依赖性最小，黄尾鰤在22.8摄氏度时热依赖性最小。根据阿伦尼乌斯图计算的活化能（Ea）在斑尾鲈（47.6千焦·摩尔^(-1)）和黄尾鰤（44.1千焦·摩尔^(-1)）之间没有显著差异。
