Similar acoustic structure and behavioural context of vocalizations produced by male and female California mice in the wild

Vocal behaviour during aggressive encounters between Siberian hamsters, Phodopus sungorus

“…For example, calls produced by male and female house mice in response to a female intruder differ in the proportional usage of USV syllable types, but not in the number or spectrotemporal characteristics of calls (Hammerschmidt et al, 2012). However, male and female California mice, Peromyscus californicus, that were observed in the wild did not differ in their vocalizations when alone and in the presence of a conspecific (Briggs & Kalcounis-Rueppell, 2011).…”

High-precision spatial localization of mouse vocalizations during social interaction

“…Potential explanations include strain differences (CBA/CaOlaHsd, current study, vs C57/BL6 8 and wild california mice 40 ) as well as experimental or recording conditions. Furthermore, due to the neutral experimental area used here, we expect calls emitted to relate mostly to courtship rather than territorial disputes (which can both occur in these contexts 8 ), suggesting at least a partial difference in behavioural states across the aforementioned studies.…”

Male fidelity expressed through rapid testosterone suppression of ultrasonic vocalizations to novel females in the monogamous California mouse

“…SVs are low bandwidth calls with a low modulation and a peak frequency around 20kHz and duration of approximately 100-500ms. SVs exhibit strong upper harmonics and can vary in number of syllables within a given bout in the wild and in the laboratory (Briggs and Kalcounis-Rueppell, 2011;Kalcounis-Rueppell et al, 2010). Because we were interested in changes in production rate rather than call structure (see Brudynski and Pniak, 2002), we counted each syllable as a unique "SV".…”

“…Although USVs have been implicated in courtship behavior in related rodent species (Brudzynski and Pniak, 2002;Musolf et al, 2010;Nyby, 1979;Sipos et al, 1993;Whitney et al, 1973), functional roles of USVs in the California mouse are hitherto less well studied (but see Briggs and Kalcounis-Rueppell, 2011 found that a male's T level during courtship is positively predictive of his paternal quality in this biparental species (Gleason and Marler, 2010).…”

“…Peromyscus californicus ultrasonic vocal communication, were used for mice of both sexes (Briggs and Kalcounis-Rueppell, 2011;Kalcounis-Rueppell et al, 2010;Timonin, Marler, and Kalcounis-Rueppell, unpublished). These include simple sweeps, complex sweeps, and 1-, 2-, 3-, 4-, 5-syllable vocalizations (SVs; Figure 1).…”