期刊
BIOLOGY LETTERS
卷 5, 期 1, 页码 86-89出版社
ROYAL SOC
DOI: 10.1098/rsbl.2008.0481
关键词
ageing; basal metabolic rate; senescence; zebra finches; Taeniopygia guttata; energy metabolism
资金
- Norwegian Science Research Council [138698/410, 159584/V40]
- NTNU
- NWO
Oxidative stress is suggested as a contributor to the ageing process. Knowledge of the relationship between age and energy expenditure may contribute to our understanding of ageing patterns, due to the link between oxygen consumption and free radical production. However, studies on basal metabolic rate (BMR) and age have generally been cross-sectional, which may confound estimates of the age effect due to disproportionate mortality ( also known as' selective disappearance'). We therefore performed a longitudinal study of BMR using captive zebra finches (Taeniopygia guttata) up to 5 years of age. BMR declined with age in individuals of both sexes when body mass was controlled for. Males gained mass with age while females did not. There was no evidence for disproportionate mortality with respect to BMR in either sex. To our knowledge, this is the first longitudinal study of avian BMR over such a long proportion of the lifespan of the study species.
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