highly significantP ≤ 0.0004
2–6 d old (= pooled 2–3 d old and 4–6 d old nestlings) and 7–9 d old nestlings, still showed highly significant differences between these two groups of nestlings (MANOVA, in each case P ≤ 0.0004; for Age, df = 3 and 87.0; and for Brood identity(Age), df = 3 and 256.04).