期刊
JOURNAL OF EXPERIMENTAL BIOLOGY
卷 214, 期 16, 页码 2690-2696出版社
COMPANY OF BIOLOGISTS LTD
DOI: 10.1242/jeb.052993
关键词
cost of transport; energetics; accelerometer; Dermoptera; locomotor ecology; flying lemur
类别
资金
- Department of Integrative Biology, University of California, Berkeley
- Wildlife Reserves Singapore
- Royal Society
- Engineering and Physical Sciences Research Council [EP/E500137/1] Funding Source: researchfish
Gliding is thought to be an economical form of locomotion. However, few data on the climbing and gliding of free-ranging gliding mammals are available. This study employed an animal-borne three-dimensional acceleration data-logging system to collect continuous data on the climbing and gliding of free-ranging Malayan colugos, Galeopterus variegatus. We combined these movement data with empirical estimates of the metabolic costs to move horizontally or vertically to test this long-standing hypothesis by determining whether the metabolic cost to climb to sufficient height to glide a given distance was less than the cost to move an equivalent distance horizontally through the canopy. On average, colugos climb a short distance to initiate glides. However, due to the high energetic cost of climbing, gliding is more energetically costly to move a given horizontal distance than would be predicted for an animal travelling the same distance through the canopy. Furthermore, because colugos spend a small fraction of their time engaged in locomotor activity, the high costs have little effect on their overall energy budget. As a result, the energetic economy hypothesis for the origins of gliding is not supported. It is likely that other ecologically relevant factors have played a greater role in the origins of gliding in colugos and other mammals.
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