Making overall dynamic body acceleration work: on the theory of acceleration as a proxy for energy expenditure
Version of Record online: 2 AUG 2010
© 2010 The Authors. Methods in Ecology and Evolution © 2010 British Ecological Society
Methods in Ecology and Evolution
Volume 2, Issue 1, pages 23–33, January 2011
How to Cite
Gleiss, A. C., Wilson, R. P. and Shepard, E. L. C. (2011), Making overall dynamic body acceleration work: on the theory of acceleration as a proxy for energy expenditure. Methods in Ecology and Evolution, 2: 23–33. doi: 10.1111/j.2041-210X.2010.00057.x
- Issue online: 3 FEB 2011
- Version of Record online: 2 AUG 2010
- Received 26 January 2010; accepted 28 June 2010 Handling Editor: Robert P. Freckleton
Fig. S1. Tri-axial accelerometers record the movement of an object separately in three dimensions to represent movement in 3-dimensional space. Axis are usually aligned with those of the animal, so that x represents surging acceleration (posterior – anterior), y represents the heaving acceleration (dorso-ventral) and z-represents the swaying acceleration (lateral). These definitions are tied to the posture of the animal and may change according to behaviour (Yoda et al., 2001).
Fig. S2. Flow chart showing sources of variability of the ratio of conversion of chemical energy (ATP) and the mechanical work performed by the centre of mass (approximated by ODBA) as may be encountered during various activies of a single animal of a given species. There are three main steps from ATP to ODBA, variability in the efficiency in the production of work by a single muscle (Force-Velocity Relationship), the ratio of work performed by all the limbs in relation to that perceived in the centre of mass (mechanical efficiency, ratio of internal to external work) and the ratio of interial vs. de novo mechanical work. This variability is affected by a number of factors which are discussed in the text.
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