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Zoological Research
Kunming Institute of Zoology, Chinese Academy of Sciences
ISSN: 2095-8137
Vol. 35, No. 1, 2014, pp. 33-41
Bioline Code: zr14003
Full paper language: English
Document type: Research Article
Document available free of charge

Zoological Research, Vol. 35, No. 1, 2014, pp. 33-41

 en Effects of temperature acclimation on body mass and energy budget in the Chinese bulbul Pycnonotus sinensis check for this species in other resources
WU, Yu-Nan; LIN, Lin; XIAO, Yu-Chao; ZHOU, Li-Meng; LIU, Jin-Song; WU, Meng-Si & ZHANG, Hui-Ying

Abstract

Chinese bulbuls ( Pycnonotus sinensis check for this species in other resources ) 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.

Keywords
Body mass; Energy budget; Pycnonotus sinensis; Temperature acclimation

 
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