Kieffer James D, Penny Faith M, Papadopoulos Vasoula
Department of Biology and MADSAM Sturgeon Physiology Lab, University of New Brunswick, Saint John, NB, E2L 4L5, Canada,
Fish Physiol Biochem. 2014 Apr;40(2):551-9. doi: 10.1007/s10695-013-9865-8. Epub 2013 Sep 27.
This study examined the effects of acclimation temperature (10, 15, 20, or 25 °C) and an acute exposure to various temperatures on the routine metabolism of juvenile (~11 g) shortnose sturgeon (Acipenser brevirostrum). For the acclimation experiment, the minimum, mean, and maximum routine metabolic rates were established for sturgeon at each temperature. Mean routine metabolic rates for 10, 15, 20, and 25 °C were 134, 277, 313, and 309 mg O2 kg(-1) h(-1), respectively, with significant differences occurring between 10 and 15, 10 and 20, and 10 and 25 °C. For the acute exposure, similar patterns and significant differences were observed. Temperature quotient (Q 10) values indicate that the greatest effect of temperature occurred between 10 and 15 °C for both the acclimation and acute temperature experiments. In addition, the effect of temperature on the metabolic rate of sturgeon was nearly negligible between 15 and 25 °C. These results suggest that juvenile shortnose sturgeon are sensitive to temperature changes at the lower end of the range, and less sensitive in the mid-to-upper temperature range.
本研究考察了驯化温度（10、15、20或25℃）以及急性暴露于不同温度对幼年（约11克）短吻鲟（Acipenser brevirostrum）常规代谢的影响。在驯化实验中，确定了每个温度下鲟鱼的最低、平均和最高常规代谢率。10、15、20和25℃下的平均常规代谢率分别为134、277、313和309毫克O2·千克-1·小时-1，10℃与15℃、10℃与20℃以及10℃与25℃之间存在显著差异。在急性暴露实验中，观察到了类似的模式和显著差异。温度系数（Q10）值表明，在驯化和急性温度实验中，温度的最大影响均出现在10℃与15℃之间。此外，在15℃至25℃之间，温度对鲟鱼代谢率的影响几乎可以忽略不计。这些结果表明，幼年短吻鲟对较低温度范围内的温度变化敏感，而在中高温度范围内敏感性较低。
