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Field metabolic rate (FMR) refers to a measurement of the metabolic rate of a free-living animal in the wild.


Measurement of the Field metabolic rate is made using the doubly labeled water method, although alternative techniques, such as monitoring heart rates, can also be used. The advantages and disadvantages of the alternative approaches have been reviewed by Butler, et al.[1] Several summary reviews have been published.[2][3][4]


  1. ^ Butler, P.J., Green, J.A., Boyd, I.L. and Speakman, J.R. (2004) Measuring metabolic rate in the field: the pros and cons of the doubly-labelled water and heart rate methods. Functional Ecology 18: 168-183
  2. ^ Speakman, JR (2000) The cost of living: Field metabolic rates of small mammals. Advances in Ecological Research 30: 177-297
  3. ^ Nagy, KA (2005) Field metabolic rates and body size. Journal of Experimental Biology 208, 1621-1625
  4. ^ Dunn, Ruth E.; White, Craig R.; Green, Jonathan A. (2018-06-01). "A model to estimate seabird field metabolic rates". Biology Letters. 14 (6): 20180190. doi:10.1098/rsbl.2018.0190. ISSN 1744-9561. PMID 29875209.