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<p>Ultrasonic vocalizations (USVs) were not previously described for pikas. This study describes ultrasonic calls, produced by Daurian pikas <i>Ochotona dauurica</i> when disturbed by a potential threat (standing researcher or a small chair with mounted recording device) in the vicinity of the burrow entrances of their native colonies. The USVs of pikas were always produced as separate calls, followed by intervals of up to a few minutes. The USVs were never produced in regular series. Frequency range of 80% of USVs had fundamental and peak frequencies from 31.0 to 37.5&#xa0;kHz. All USVs had a flat frequency contour with frequency modulation not exceeding 4.8&#xa0;kHz. The USV duration was 40 ms on average and did not exceed 77 ms. The acoustic structure of USVs was very simple, without breaks in frequency contours and without any kind of nonlinear vocal phenomena. Some USVs of pikas followed by or alternated with their audible alarm calls. We propose that pika USVs were vigilance-related and probably served as alarm signals for colony members.</p>

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Ultrasonic communication of potential danger in a lagomorph species, the Daurian pika (Ochotona dauurica)

  • 期刊论文

  • 发表日期：

    2026年7月4日

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  • Ilya A. Volodin,
  • Vadim E. Kirilyuk,
  • Elena V. Volodina

摘要

Ultrasonic vocalizations (USVs) were not previously described for pikas. This study describes ultrasonic calls, produced by Daurian pikas Ochotona dauurica when disturbed by a potential threat (standing researcher or a small chair with mounted recording device) in the vicinity of the burrow entrances of their native colonies. The USVs of pikas were always produced as separate calls, followed by intervals of up to a few minutes. The USVs were never produced in regular series. Frequency range of 80% of USVs had fundamental and peak frequencies from 31.0 to 37.5 kHz. All USVs had a flat frequency contour with frequency modulation not exceeding 4.8 kHz. The USV duration was 40 ms on average and did not exceed 77 ms. The acoustic structure of USVs was very simple, without breaks in frequency contours and without any kind of nonlinear vocal phenomena. Some USVs of pikas followed by or alternated with their audible alarm calls. We propose that pika USVs were vigilance-related and probably served as alarm signals for colony members.