Institute of Biochemistry and Molecular Biology, School of Life Science, Lanzhou University, 222 Tianshui South Road, Lanzhou 730000, China.
Zoology (Jena). 2013 Dec;116(6):331-5. doi: 10.1016/j.zool.2013.08.006. Epub 2013 Oct 6.
A viviparous lizard, Eremias multiocellata, was used to investigate the possible sexual and ontogenetic effects on selected body temperature, thermal tolerance range and the thermal dependence of locomotor performance. We show that adults are sexually dimorphic and males have larger bodies and heads than females. Adults selected higher body temperatures (34.5 vs. 32.4°C) and could tolerate a broader range of body temperatures (8.1-46.8 vs. 9.1-43.1°C) than juveniles. The sprint speed and maximum sprint distance increased with temperature from 21°C to 33°C, but decreased at 36°C and 39°C in both juveniles and adults. Adults ran faster and longer than juveniles at each tested temperature. Adult locomotor performance was not correlated with snout-vent length (SVL) or sex, and sprint speed was positively correlated with hindlimb length. Juvenile locomotor performance was positively correlated with both SVL and hindlimb length. The ontogenetic variation in selected body temperature, thermal tolerance and locomotor performance in E. multiocellata suggests that the effects of morphology on temperature selection and locomotor performance vary at different ontogenetic stages.
一种胎生蜥蜴，多棘蜥，被用来研究选择体温、热耐受范围和运动表现的热依赖性的可能的性和个体发育效应。我们表明，成年个体存在性别二态性，雄性的身体和头部比雌性大。成年个体选择更高的体温（34.5 摄氏度对 32.4 摄氏度），并能耐受更宽的体温范围（8.1-46.8 摄氏度对 9.1-43.1 摄氏度）比幼体。在 21°C 到 33°C 的温度范围内，冲刺速度和最大冲刺距离随温度的升高而增加，但在 36°C 和 39°C 时，幼体和成年个体的速度都下降。在每个测试温度下，成年个体的奔跑速度和距离都比幼体快。成年个体的运动表现与吻肛长（SVL）或性别无关，冲刺速度与后肢长度呈正相关。幼体的运动表现与 SVL 和后肢长度均呈正相关。多棘蜥选择体温、热耐受和运动表现的个体发育变化表明，形态对温度选择和运动表现的影响在不同的个体发育阶段是不同的。
