Figure 2. Effects of the experimental treatment on the immune response according to nestling rank calculated from RM-ANOVAs in the successive experimental sessions.

The significance of interactions between experimental treatment and nestling rank are also shown. P-values associated to LSD post hoc tests (i.e. treatment effect within nestling rank) are indicated as ns: P>0.05; st: 0.1≤P≥0.05; *: P<0.05; **: P<0.001 and ***: P<0.0001.