摘要
通过测定摄食后印度蜓蜥雌性成体的耗氧量变化 ,研究摄食特殊热动力作用 (SDA)。动物分为摄食黄粉虫幼虫实验组和禁食对照组 ,两组蜥蜴平均体重无显著差异。测定耗氧量前 ,将所有动物在 3 0℃恒温室内禁食 3d。用容积为 3 0 0ml的封闭式呼吸室测定两组蜥蜴在 3 0℃条件下连续 3d的耗氧量 ,测定间隔时间为 4～ 2 5h。禁食组动物实验期间的耗氧量无显著的时间变异 ,实验组动物耗氧量的时间变异显著 ,这些结果表明摄食影响印度蜓蜥的代谢率。实验组动物摄食 8h后耗氧量已显著大于禁食组 ,摄食 3 0h后两组动物的耗氧量无显著差异。印度蜓蜥达到SDA峰值的平均时间约为 1 2 7h ,SDA峰值耗氧量是禁食对照组动物耗氧量的 1 6倍。印度蜓蜥单次摄食实验中的SDA具有进食后耗氧量迅速增加 ,达到峰值后下降至摄食前水平的典型模式。
Specific dynamic action (SDA) of feeding was studied based on adult female brown forest skinks (Sphenomorphus indicus) captured in May 2003 from three localities in Hangzhou, Zhejiang, eastern China, and gave birth to neonates in the laboratory during July. 18 postpartum females were selected and assigned into two groups: the experimental group and the unfed control group in August. Body mass of the skinks varied from 9.0 to 13.2 g. No difference of the mean body mass can be found between experimental and control skinks. After 3 days fasting at 30℃, the experimental skinks were fed on mealworms (larvae of Tenebrio molitor). The ingested mealworms varied from 0.33 to 0.58 (mean=0.51) g. Skinks were housed individually in a 300 ml closed respiratory chamber. Oxygen consumption was measured at 0, 4, 8, 12, 16, 23, 30, 41 and 66 h since feeding. Temporal variation in oxygen consumption can be found in experimental skinks but can not be found in control ones, which suggests that feeding exerts an effect on metabolic rate (and thus, SDA) in S.indicus. Experimental skinks consumed significantly more oxygen than did control ones during the period between 8 and 23 h since feeding.The peak metabolic rate in S.indicus is 1.6 times higher in experimental group than in control one. The mean time to reach a peak of SDA was 12.7 h for the experimental skinks. It shows that the pattern of SDA of feeding in S.indicus is similar to that reported for most other animals, that is oxygen consumption increasing to a peak rapidly after feeding, and then decreasing gradually to the prefeeding value. After compared our data with the corresponding data reported for other species, it is found that the time to reach a peak of SDA, the duration of SDA and the magnitude of the SDA peak differ considerably in species.
出处
《动物学杂志》
CAS
CSCD
北大核心
2004年第5期5-8,共4页
Chinese Journal of Zoology
基金
浙江省 15 1人才基金
杭州市新世纪 131人才基金资助项目
关键词
禁食
对照组
耗氧量
摄食
实验
SDA
后下
动物
时间变异
代谢率
Scincidae
Brown forest skink (Sphenomorphus indicus)
Food intake
Oxygen consumption
Specific dynamic action
