highly significantp < 0.0001
Dive depths were not significantly affected by the interaction of species and breeding stage (linear mixed effects model; LR 2 = 0.53, p > 0.7) nor an additive effect of breeding stage (LR 2 = 5.38, p > 0.05), but that of species alone was highly significant (LR 1 = 11.37, p < 0.0001).