Table 1.

Partial correlation coefficients for physiological traits and residual nestling mass in adult tree swallows during the breeding season for males (below, open squares) and females (above, shaded squares)

Telomere lengths and oxidative stress are the first components resulting from a PCA. High values of the oxidative PC1 indicate relatively higher oxidative stress (i.e., low antioxidant capacity and high ROMs). Numbers in bold indicate a significant relationship.