Figure 3
From: Ants modulate stridulatory signals depending on the behavioural context

Values of dominant frequency (Hz), Root Mean Squared (RMS) and chirp duration (s) of the substrate-borne vibrations produced by stridulation, for both the restraining and food trials. Qfw: queens’ forward chirp; Qbw: queens’ backward chirp; Mfw: males’ forward chirp; Mbw: males’ backward chirp; Wfw: workers’ forward chirp; Wbw: workers’ backward chirp; Large: large honey drop (20 µl); Small: small honey drop (2 µl); Restraining: mean values of chirp parameters emitted by workers during restraining. (a–c); comparison of chirp parameter among castes; (d–f) comparison of workers’ chirp parameters between different food sizes and in the restraining context.