Additional file 1.
Genetic (A) and environmental (E) covariances (cov) and correlations (r) between song rate (BLUPs of song rate, in seconds1/2), beak colour (PC1), tarsus length (mm) and fitness (number of eggs fertilised/mean number of eggs fertilised). CovA and covE adds up to the phenotypic covariance, and likewise for the correlations.
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Bolund et al. BMC Evolutionary Biology 2011 11:327 doi:10.1186/1471-2148-11-327