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Acoustic data in four species of macaques

Citation

Rebout, Nancy et al. (2021), Acoustic data in four species of macaques, Dryad, Dataset, https://doi.org/10.5061/dryad.905qfttgw

Abstract

We provide comparative data on vocal signals in adult females of four species of macaque : Tonkean macaques (Macaca tonkeana), crested macaques (M. nigra), Japanese macaques (M. fuscata), and rhesus macaques (M. mulatta).

We distinguished three social contexts: agonistic, affiliative and neutral. The agonistic context included aggression (supplantation, lunge, chase, slap, grab, bite, facial threat display) and response to aggression (aggression, avoidance, flight, crouch, submissive facial displays). The affiliative context included affiliative behaviours (approach, sitting in contact, social grooming, social play, grasp, embrace, mount, affiliative facial display). In the neutral context, the caller was not involved in a social interaction.

We drew spectrograms using the sofware Raven Pro v1.4’ (Cornell Lab of Ornithology, www.birds.cornell.edu/raven) with a 256 fast Fourier transform length and a Hanning window. With the same software, we measured the following variables: Duration: duration from the beginning to the end of a call, in seconds; Q2 ratio: ratio between duration that divides a call into two intervals of equal energy and duration in percentage; Q1 frequency: value of the frequency that divides a call into two intervals containing 25% and 75% of the energy, in Herz; Q2 frequency: value of the frequency that divides a call into two intervals of equal energy, in Herz; Q3 frequency: value of the frequency that divides a call into two intervals containing 75% and 25% of the energy, in Herz; Wiener’s aggregate entropy: degree of disorder (i.e. noisiness) of the call, which uses the total energy in a frequency bin over the entire call; Wiener’s average entropy: mean of the mean entropies of the different time slices of a call. Our objective was to compare the four species on tonal and atonal calls, so we did not take into account the variables associated with fundamental frequencies since they are absent in atonal calls.

Methods

We made behavioural acoustic recordings in 14 adult females from two groups of Japanese macaques, 16 adult females from two groups of rhesus macaques, 11 adult females from four groups of Tonkean macaques, and 18 adult females from two groups of crested macaques.

Usage Notes

There are no missing values.

Funding

Centre National de la Recherche Scientifique

Université de Strasbourg

Fondazione Ethoikos

Fondazione Ethoikos