Female African elephant rumbles differ between populations and sympatric social groups.

For the proximity scores extracted from the random forest trained to predict bond group, belonging to the same bond group was a marginally non-significant predictor of call similarity (gamma regression, χ 2 = 3.5, p = 0.060) and genetic relatedness was not significant (gamma regression, χ 2 = 0.133, p = 0.715) (electronic supplementary material, figure S2, table 3 ). 4.

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