原尾蜥虎的选择体温、热耐受性和食物同化的热依赖性  

Selected body temperature, thermal tolerance and the thermal dependence of food assimilation in the Bowring's gecko Hemidactylus bowringii

作　　者：徐大德[1] 安虹[1] 陆洪良[1] 计翔[1] 

机构地区：[1]南京师范大学江苏省生物多样性和生物技术重点实验室

出　　处：《动物学报》2007年第6期959-965,共7页ACTA ZOOLOGICA SINICA

基　　金：浙江省动物学重点学科和师资培训计划资助项目~~

摘　　要：(Tsel)、热耐受性和体温对食物同化的影响。Tsel无显著的日时间变化,两性个体的Tsel、临界低温(CTMin)和临界高温(CTMax)无显著的差异。Tsel、CTMin和CTMax的平均值分别为30.9℃、3.2℃和43.3℃。体温对动物食物通过时间有显著的影响。在25℃-33℃范围内,食物通过时间随体温升高而缩短;体温超过33℃后,食物通过时间随体温升高而延长。温度对原尾蜥虎的摄食量、表观消化系数(ADC)和同化效率(AE)有显著的影响。在25℃-37℃范围内,动物在低体温下(25℃和27℃)的摄食量、ADC和AE小于更高体温下动物的对应数值。种间比较结果显示,原尾蜥虎是生活于南方的蜥蜴中具有较强耐受极端体温的种类。In mid-August and early October of 2004, we collected adult Bowring＇s geckos Hemidactylus bowringii from Zhaoqing （Guangdong, southern China） to study selected body temperature （Tsel）, thermal tolerance and the thermal dependence of food assimilation. All geckos used in this study were adults larger than 45.7 mm SVL （snout-vent length）. We did not find any sex differences in Tsel, critical thermal minimum （CTMin） and critical thermal maximum （CTMax）. No diel variation in Tsel was found in this study, and Tsel measured on a laboratory thermal gradient was 31.5℃. CTMin and CTMax averaged 3.2℃ and 43.3℃, respectively. Within the range from 25℃ to 37℃, food passage time, daily food intake, apparent digestive coefficient （ADC） and assimilation efficiency （AE） were all affected by body temperature. Food passage time decreased with increase in body temperature within the range from 25℃ to 33℃, and then increased at higher body temperatures. Geckos at 25℃ and 27℃ took apparently less food than did those at higher body temperatures. Geckos at the two lower body temperatures also had apparently lower ADC and AE than did those at higher body temperatures. The range of viable body temperatures is wider in the Bowling＇ s gecko （3.2℃ - 43.3℃ ） than in diurnal lizards [e.g. Eumeces chinensis （6.3℃ - 42.3℃ ） and E. elegans （9.3℃ - 41.9℃ ） ] also living in the southern provinces of China, suggesting that H. bowringii is among lizard species with a relatively great ability to tolerate extreme body temperatures [Acta Zoologica Sinica 53 （6）： 959- 965, 2007].

关 键 词：壁虎科 原尾蜥虎 选择体温 热耐受性 食物通过时间 食物同化 

分 类 号：Q4[生物学—生理学]