Table 2.

Output of the best model fitted using restricted maximum likelihood estimation with bird ID as a random effect.

Body mass change ~ foraging dives per hour (n = 25, R2 = 0.44)
Fixed effect	Value	SE	DF	t-value	p-value
Intercept	− 1.658	0.430	13	− 3.855	0.002
Foraging_dives_per_hour	0.170	0.039	13	4.325	< 0.001

R² = marginal r-squared value for mixed models from Nakagawa et al.⁵⁹.