Present address: Department of Biology, University of California, Riverside CA 92521, USA.
Genetic correlation between resting metabolic rate and exploratory behaviour in deer mice (Peromyscus maniculatus)
Article first published online: 23 JUN 2011
© 2011 The Authors. Journal of Evolutionary Biology © 2011 European Society For Evolutionary Biology
Journal of Evolutionary Biology
Volume 24, Issue 10, pages 2153–2163, October 2011
How to Cite
CAREAU, V., THOMAS, D., PELLETIER, F., TURKI, L., LANDRY, F., GARANT, D. and RÉALE, D. (2011), Genetic correlation between resting metabolic rate and exploratory behaviour in deer mice (Peromyscus maniculatus). Journal of Evolutionary Biology, 24: 2153–2163. doi: 10.1111/j.1420-9101.2011.02344.x
- Issue published online: 12 SEP 2011
- Article first published online: 23 JUN 2011
- Received 22 January 2011; revised 24 May 2011; accepted 26 May 2011
- basal metabolic rate;
- energy expenditure;
- genetic covariance;
- permanent environment effect;
According to the ‘pace-of-life’ syndrome hypothesis, differences in resting metabolic rate (RMR) should be genetically associated with exploratory behaviour. A large number of studies reported significant heritability for both RMR and exploratory behaviour, but the genetic correlation between the two has yet to be documented. We used a quantitative genetic approach to decompose the phenotypic (co)variance of several metabolic and behavioural measures into components of additive genetic, common environment and permanent environment variance in captive deer mice. We found significant additive genetic variance for two mass-independent metabolic measures (RMR and the average metabolic rate throughout the respirometry run) and two behavioural measures (time spent in centre and distance moved in a novel environment). We also detected positive additive genetic correlation between mass-independent RMR and distance moved (rA = 0.78 ± 0.23). Our results suggest that RMR and exploratory behaviour are functionally integrated traits in deer mice, providing empirical support for one of the connections within the pace-of-life syndrome hypothesis.