摘要
荒漠沙蜥(Phrynocephalus przewalskii strauch)和密点麻蜥(Eremias multiocellata Guenther)的体温都随环境温度的变化而变化,相关非常显著(P<0.001)。在相同环境温度条件下,荒漠沙蜥的体温约高于密点麻蜥3℃,荒漠沙蜥集中选择38—40℃的环境,密点麻蜥选择35—37℃的环境。荒漠沙蜥的热僵死阈值为44—48℃,致死温度(T_(L50))为48℃,密点麻蜥的热僵死阈值为42—46℃,致死温度(T_(L50))为46℃。两种蜥蝎对低温的耐受性基本相似,冷僵温度为0——3℃,致死低温(T_(L50)):荒漠沙蜥为-2.3℃,密点麻蜥为-2.5℃。两种蜥蜴的这些差异与种的特征、栖息环境及体形的大小有关。
The paper deals with the relationship between the body temperatures of Phrynoce phalus przewalskii (Sthauch) and Eremias multiocellata (Guenther) and the environmental temperatures, their selections of environmental temperatures and their resistance against low and high temperatures. The body temperatures of przewalskii and multiocellata were negatively interrelated to environmental temperatures (P<0.001). Under the same temperatures, the body temperatures of przewalskii were 3 ℃ higher than that of multiocellata. The environmental temperatures selected by the former were 38-40℃ whereas the latter required only 35-37℃. The hot and dead temperatures of przewalskii were higher than those of multiocellata. The threshhold of the hot and dead temperatures in przewalskii varied from 44℃ to 48℃ and its highest dead temperature (TL50) was up to 48℃, and that in multiocellata was 42-46℃and its highest hot temperature (TL50) was 46℃. The ability that two species can resist against low temperatures was equal. The cold and dead temperatures varied from 0 ℃ to - 3 ℃. The cold and dead temperatures (TL50) of przewalskii were -2.3℃, but those of multiocellata were -2.5℃. These significant differences between the two species arc concerned with the characteristics of each, habitats and sizes of the bodies.
基金
国家自然科学基金资助项目
关键词
荒漠沙晰
密点麻晰
体温
环境温度
Phrynocephalus przewaiskii, Ercmias multiocellala, Body temperatures, Environmental temperatures. Resistance. Selection of temperatures
