膳食钠的摄入量是以绝对量（mg/d）表示而不是以钠密度（mg/kcal）表示的。研究者旨在确定钠摄入量与血压关系的强弱是否随着能量摄入量而变化。终止高血压膳食研究（dietary approaches to stop hypertension,DASH）-钠试验是比较2种...膳食钠的摄入量是以绝对量（mg/d）表示而不是以钠密度（mg/kcal）表示的。研究者旨在确定钠摄入量与血压关系的强弱是否随着能量摄入量而变化。终止高血压膳食研究（dietary approaches to stop hypertension,DASH）-钠试验是比较2种膳食（DASH和对照）和3种钠密度水平的随机膳食摄入试验。展开更多
Chinese bulbuls(Pycnonotus sinensis) are small passerine birds that inhabit areas of central, southern and eastern China. Previous observations suggest that free–living individuals of this species may change their fo...Chinese bulbuls(Pycnonotus sinensis) are small passerine birds that inhabit areas of central, southern and eastern China. Previous observations suggest that free–living individuals of this species may change their food intake in response to seasonal changes in ambient temperature. In the present study, we randomly assigned Chinese bulbuls to either a 30 °C or 10 °C group, and measured their body mass(BM), body temperature, gross energy intake(GEI), digestible energy intake(DEI), and the length and mass of their digestive tracts over 28 days of acclimation at these temperatures. As predicted, birds in the 30 °C group had lower body mass, GEI and DEI relative to those in the 10 °C group. The length and mass of the digestive tract was also lower in the 30 °C group and trends in these parameters were positively correlated with BM, GEI and DEI. These results suggest that Chinese bulbuls reduced their absolute energy demands at relatively high temperatures by decreasing their body mass, GEI and DEI, and digestive tract size.展开更多
文摘膳食钠的摄入量是以绝对量（mg/d）表示而不是以钠密度（mg/kcal）表示的。研究者旨在确定钠摄入量与血压关系的强弱是否随着能量摄入量而变化。终止高血压膳食研究（dietary approaches to stop hypertension,DASH）-钠试验是比较2种膳食（DASH和对照）和3种钠密度水平的随机膳食摄入试验。
基金supported by the National Natural Science Foundation of China(31070366)the‘Xinmiao’Project in Zhejiang Province
文摘Chinese bulbuls(Pycnonotus sinensis) are small passerine birds that inhabit areas of central, southern and eastern China. Previous observations suggest that free–living individuals of this species may change their food intake in response to seasonal changes in ambient temperature. In the present study, we randomly assigned Chinese bulbuls to either a 30 °C or 10 °C group, and measured their body mass(BM), body temperature, gross energy intake(GEI), digestible energy intake(DEI), and the length and mass of their digestive tracts over 28 days of acclimation at these temperatures. As predicted, birds in the 30 °C group had lower body mass, GEI and DEI relative to those in the 10 °C group. The length and mass of the digestive tract was also lower in the 30 °C group and trends in these parameters were positively correlated with BM, GEI and DEI. These results suggest that Chinese bulbuls reduced their absolute energy demands at relatively high temperatures by decreasing their body mass, GEI and DEI, and digestive tract size.
