A1 Refereed original research article in a scientific journal
Individual variation in metabolic reaction norms over ambient temperature causes low correlation between basal and standard metabolic rate
Authors: Briga M, Verhulst S
Publisher: COMPANY OF BIOLOGISTS LTD
Publication year: 2017
Journal:: Journal of Experimental Biology
Journal name in source: JOURNAL OF EXPERIMENTAL BIOLOGY
Journal acronym: J EXP BIOL
Volume: 220
Issue: 18
First page : 3280
Last page: 3289
Number of pages: 10
ISSN: 0022-0949
eISSN: 1477-9145
DOI: https://doi.org/10.1242/jeb.160069
Abstract
Basal metabolic rate (BMR) is often assumed to be indicative of the energy turnover at ambient temperatures (T-a) below the thermoneutral zone (SMR), but this assumption has remained largely untested. Using a new statistical approach, we quantified the consistency in nocturnal metabolic rate across a temperature range in zebra finches (N=3213 measurements on 407 individuals) living permanently in eight outdoor aviaries. Foraging conditions were either benign or harsh, and body mass and mass-adjusted BMR (BMRm) and SMR (SMRm) were lower in individuals living in a harsh foraging environment. The correlation between SMRm at different T-a was high (r=0.91), independent of foraging environment, showing that individuals are consistently ranked according to their SMRm. However, the correlations between BMRm and SMRm were always lower (average: r=0.29; range: 0
Basal metabolic rate (BMR) is often assumed to be indicative of the energy turnover at ambient temperatures (T-a) below the thermoneutral zone (SMR), but this assumption has remained largely untested. Using a new statistical approach, we quantified the consistency in nocturnal metabolic rate across a temperature range in zebra finches (N=3213 measurements on 407 individuals) living permanently in eight outdoor aviaries. Foraging conditions were either benign or harsh, and body mass and mass-adjusted BMR (BMRm) and SMR (SMRm) were lower in individuals living in a harsh foraging environment. The correlation between SMRm at different T-a was high (r=0.91), independent of foraging environment, showing that individuals are consistently ranked according to their SMRm. However, the correlations between BMRm and SMRm were always lower (average: r=0.29; range: 0
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