Institute of Biochemistry and Molecular Biology, School of Life Sciences, Lanzhou University, 222 Tianshui South Road, Lanzhou, 730000, PR China.
Comp Biochem Physiol A Mol Integr Physiol. 2013 Jun;165(2):207-13. doi: 10.1016/j.cbpa.2013.03.007. Epub 2013 Mar 14.
The effects of hypoxia on behavioral thermoregulation, rate of heating and cooling, hysteresis of heart rate, and standard metabolic rate (SMR) were investigated in Phrynocephalus przewalskii, a small size toad headed lizard. Preferred temperature (T(b)) descended when lizards were exposed to severe hypoxia (8% O(2) and 6% O(2)) for 22 h, and lizards were able to maintain preferred T(b) after one week at 12% and 8% O(2) respectively. The period of heating increased after being treated with hypoxia (12% and 8% O(2)) for one week. Hysteresis of heart rate appeared at any given body temperature and oxygen level except at 39 °C and 40 °C at 8% O(2). SMR significantly increased after one-week acclimatization to 12% and 8% O(2) when ambient temperature (T(a)) was 25 °C, however, it did not change at 35 °C. Thus, we suggest that P. przewalskii has special thermoregulatory and metabolic mechanisms to acclimatize to the hypoxic environment.
缺氧对高原沙蜥（一种小型的蜥蜴）的行为性体温调节、加热和冷却速率、心率滞后以及标准代谢率（SMR）的影响进行了研究。当蜥蜴暴露在严重缺氧（8% O(2) 和 6% O(2)）中 22 小时时，它们的偏好温度（T(b)）下降，并且在分别处于 12%和 8% O(2)的环境中一周后，蜥蜴能够维持偏好的 T(b)。在缺氧处理（12%和 8% O(2)）一周后，加热周期增加。心率滞后出现在任何给定的体温和氧气水平，除了在 8% O(2)下的 39°C 和 40°C。当环境温度（T(a)）为 25°C 时，高原沙蜥在适应 12%和 8% O(2)一周后，SMR 显著增加，但在 35°C 时没有变化。因此，我们认为高原沙蜥具有特殊的体温调节和代谢机制来适应缺氧环境。
