Results from linear mixed effects models investigating the rate of body density change in relation to the number of PCAs, energy expenditure and the predominant habitat occupied.

For the categorical variable, the baseline is set at habitat 1, i.e. values for habitats 2 and 3 in the table are the differences between their estimated coefficients and the ones for habitat 1. Significant variables at 0.05 are highlighted in bold. A random effect of individual was included on the intercept: std = 0.21. The difference in rate of body density change between habitat 2 and 3 is: Estimate = 0.46, std = 0.07, t = 6.1, p<0.001 (with habitat 2 set as the baseline).