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Related Experiment Video

Updated: Jul 11, 2025

Determining Basal Energy Expenditure and the Capacity of Thermogenic Adipocytes to Expend Energy in Obese Mice
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Determining energy expenditure in a large seabird using accelerometry.

Grace J Sutton1,2, Lauren P Angel1, John R Speakman3,4

  • 1School of Life and Environmental Sciences , Deakin University, 221 Burwood Hwy, Burwood, VIC 3125, Australia.

The Journal of Experimental Biology
|November 10, 2023
PubMed
Summary
This summary is machine-generated.

Accelerometry accurately estimates daily energy expenditure in Australasian gannets. Including additional movement data improves accuracy, validating its use for studying free-ranging animals.

Keywords:
Morus serratorAustralasian gannetDoubly labelled waterField metabolic rateTri-axial accelerometry

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Area of Science:

  • Animal Ecology
  • Bioenergetics
  • Movement Ecology

Background:

  • Understanding animal energy expenditure is crucial for ecological studies.
  • Accelerometry is a promising tool for estimating energy use in free-ranging animals.
  • Limited validation exists for accelerometry's accuracy in field metabolic rate estimation.

Purpose of the Study:

  • To validate accelerometry as a proxy for daily energy expenditure in Australasian gannets.
  • To assess the accuracy of accelerometry for estimating at-sea metabolic rates.
  • To improve energy expenditure models by incorporating additional movement parameters.

Main Methods:

  • Australasian gannets were equipped with GPS and tri-axial accelerometers.
  • Doubly labelled water (DLW) was used to measure field metabolic rate over 3-5 days.
  • Correlations between DLW-derived energy expenditure and accelerometry data (VeDBA) were analyzed.

Main Results:

  • High correlations were found between DLW and VeDBA for daily energy expenditure (R2=0.75-0.80).
  • Estimating at-sea metabolic rate showed variable success (R2=0.02-0.42).
  • Model predictive capacity improved with added data on distance travelled and nocturnal at-sea duration (R2=0.61-0.82).

Conclusions:

  • Accelerometry is a viable tool for estimating daily energy expenditure in free-ranging gannets.
  • Model accuracy is enhanced by incorporating movement parameters beyond accelerometry.
  • Further research may refine accelerometry's application in bioenergetic studies of wild animals.