Univariate one-way ANOVAs of the mean bouts' values amongst individuals, for each acoustic properties.

*statistically significant p-values (α = 0.05), after Holm-Bonferroni correction for multiple comparisons; n. bouts: mean and SD of the number of bouts contributed by the 10 individuals to the measured variate (all individuals differently contributed to each measured variate); N: number of bouts recorded for the measured variate amongst all individuals.