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首页> 外文期刊>The Journal of Experimental Biology >The effect of thermal acclimation on aerobic scope and critical swimming speed in Atlantic salmon, Salmo salar
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The effect of thermal acclimation on aerobic scope and critical swimming speed in Atlantic salmon, Salmo salar

机译：热驯化对大西洋鲑鱼类鲑鱼类的好氧范围和临界游泳速度的影响

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The Atlantic salmon is extensively studied owing to conservation concerns and its economic importance in aquaculture. However, a thorough report of their aerobic capacity throughout their entire thermal niche has not been described. In this study, Atlantic salmon (similar to 450 g) were acclimated for 4 weeks at 3, 8, 13, 18 or 23 degrees C, and then tested in a large Brett-type swimming respirometer in groups of 10 per trial. Both standard metabolic rate and active metabolic rate continued to increase with temperature, which resulted in an aerobic scope that also increased with temperature, but was statistically similar between 13, 18 and 23 degrees C. The critical swimming speed peaked at 18 degrees C (93.1 +/- 1.2 cm s(-1)), and decreased significantly at the extreme temperatures to 74.8 +/- 0.5 and 84.8 +/- 1.6 cm s(-1) at 3 and 23 degrees C, respectively. At 23 degrees C, the accumulated mortality reached 20% over 4 weeks, while no fish died during acclimation at colder temperatures. Furthermore, fish at 23 degrees C had poor appetite and lower condition factor despite still having a high aerobic scope, suggesting that oxygen uptake was not the limiting factor in the upper thermal niche boundary. In conclusion, Atlantic salmon were able to maintain a high aerobic capacity and good swimming capabilities throughout the entire thermal interval tested, thus demonstrating a high level of flexibility in respiratory capacity towards different temperature exposures.
机译：由于在水产养殖中，广泛研究了大西洋鲑鱼。然而，尚未描述整个热力利用整个热处理的彻底报道它们的有氧能力。在这项研究中，在3,8,13,18或23℃下将大西洋鲑鱼（类似于450g）适应4周，然后在每次试验中为10组的大Brett型游泳呼吸仪测试。标准代谢率和活性代谢率均继续随温度的增加，导致温度增加的有氧范围，但在13,18和23摄氏度之间存在统计学上类似。临界游泳速度在18℃（93.1 +/- 1.2cm S（-1）），分别在3和23摄氏度的极端温度下显着降低至74.8 +/- 0.5和84.8 +/- 1.6cm s（-1）。在23摄氏度下，累积的死亡率超过4周达到20％，而在较冷的温度下的适应期间没有鱼类。此外，尽管仍然具有高好氧范围，但仍具有较差的食欲和较低的条件因子，表明氧气吸收不是上部热利基边界中的限制因素，因此较低的食欲差和较低的条件因子。总之，大西洋鲑鱼能够在整个热处理中保持高氧能力和良好的游泳能力，从而证明了呼吸能力朝向不同的温度曝光的高水平灵活性。

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