Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1086/676933 |
Experimental Sources of Variation in Avian Energetics: Estimated Basal Metabolic Rate Decreases with Successive Measurements | |
Jacobs, Paul J.; McKechnie, Andrew E. | |
通讯作者 | McKechnie, Andrew E. |
来源期刊 | PHYSIOLOGICAL AND BIOCHEMICAL ZOOLOGY |
ISSN | 1522-2152 |
EISSN | 1537-5293 |
出版年 | 2014 |
卷号 | 87期号:5页码:762-769 |
英文摘要 | Basal metabolic rate (BMR) is one of the most widely used metabolic variables in endotherm ecological and evolutionary physiology. Surprisingly few studies have investigated how BMR is influenced by experimental and analytical variables over and above the standardized conditions required for minimum normothermic resting metabolism. We tested whether avian BMR is affected by habituation to the conditions experienced during laboratory gas exchange measurements by measuring BMR five times in succession in budgerigars (Melopsittacus undulatus) housed under constant temperature and photoperiod. Both the magnitude and the variability of BMR decreased significantly with repeated measurements, from 0.410 +/- 0.092 W (n = 9) during the first measurement to 0.285 +/- 0.042 W (n = 9) during the fifth measurement. Thus, estimated BMR decreased by similar to 30% within individuals solely on account of the number of times they had previously experienced the experimental conditions. The most likely explanation for these results is an attenuation with repeated exposure of the acute stress response induced by birds being handled and placed in respirometry chambers. Our data suggest that habituation to experimental conditions is potentially an important determinant of observed BMR, and this source of variation needs to be taken into account in future studies of metabolic variation among individuals, populations, and species. |
类型 | Editorial Material |
语种 | 英语 |
国家 | South Africa |
收录类别 | SCI-E |
WOS记录号 | WOS:000342670000017 |
WOS关键词 | EVAPORATIVE WATER-LOSS ; ENERGY-EXPENDITURE ; PHENOTYPIC FLEXIBILITY ; AEROBIC PERFORMANCE ; SEASONAL-CHANGES ; MAMMALIAN BMR ; HEART-RATE ; BIRDS ; DESERT ; STRESS |
WOS类目 | Physiology ; Zoology |
WOS研究方向 | Physiology ; Zoology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/184205 |
作者单位 | Univ Pretoria, Dept Zool & Entomol, DST NRF Ctr Excellence, Percy FitzPatrick Inst, ZA-0028 Hatfield, South Africa |
推荐引用方式 GB/T 7714 | Jacobs, Paul J.,McKechnie, Andrew E.. Experimental Sources of Variation in Avian Energetics: Estimated Basal Metabolic Rate Decreases with Successive Measurements[J],2014,87(5):762-769. |
APA | Jacobs, Paul J.,&McKechnie, Andrew E..(2014).Experimental Sources of Variation in Avian Energetics: Estimated Basal Metabolic Rate Decreases with Successive Measurements.PHYSIOLOGICAL AND BIOCHEMICAL ZOOLOGY,87(5),762-769. |
MLA | Jacobs, Paul J.,et al."Experimental Sources of Variation in Avian Energetics: Estimated Basal Metabolic Rate Decreases with Successive Measurements".PHYSIOLOGICAL AND BIOCHEMICAL ZOOLOGY 87.5(2014):762-769. |
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