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Improving the precision and accuracy for estimating energy expenditure using the heart rate method
journal contribution
posted on 2023-05-17, 05:37 authored by Green, JA, Peter FrappellPeter FrappellThe "heart rate technique" is commonly used to estimate the rate of oxygen consumption (a proxy for energy expenditure) of free-ranging animals. However, a major limitation of this technique is that interindividual variability in the relationship between heart rate (f(H)) and rate of oxygen consumption (Vo2) generates large errors of estimation when the technique is applied to individual free-ranging animals. In this study, we present a new analysis technique that takes advantage of the observation that the f(H) or Vo2 relationships between individuals are frequently parallel and differ only in elevation. This technique offers superior accuracy and precision of Vo2 estimates, reducing the coefficient of variability from 18% to 9% for individual animals in an example application in macaroni penguins. This approach enables application of the heart rate technique to deduce the energetic strategies of individual animals.
History
Publication title
Physiological and Biochemical ZoologyVolume
80Issue
5Pagination
551-555ISSN
1522-2152Department/School
School of Natural SciencesPublisher
Univ Chicago PressPlace of publication
1427 E 60Th St, Chicago, USA, Il, 60637-2954Rights statement
http://www.press.uchicago.eduRepository Status
- Restricted