水分限制改变加州小鼠的发声表现：对环境应激下声学交流的意义
Water limitation modifies vocal performance in California mice: implications for acoustic communication under environmental stress.
文献信息
| PMID | 42888256 |
|---|---|
| 原文 | 在 PubMed 查看原文 ↗ |
| 发表日期 | 2026 |
| 作者 | Tobias Riede |
| 作者单位 | Department of Physiology, College of Graduate Studies, Midwestern University, Glendale, AZ, USA. triede@midwestern.edu. |
| 期刊 | Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology |
| SCI 分区 | Q1 |
| IF | 2.5 |
| 研究类型 | 基础研究 · 基础／转化 |
| 所属专科 | 咽喉科 |
中文摘要
背景： 在干旱环境或长期干旱期间，维持水合变得越来越困难，常需要生物体减少对高代价行为的投入。发声表现对水合状态敏感，因为全身性脱水可改变声带力学并降低发声效率。在许多哺乳动物中，发声是在呼气气流诱导声带自持振动时产生的，使这一机制易受全身性水平衡紊乱的影响。方法：本研究检验脱水是否改变成年加州小鼠（Peromyscus californicus）的鸣唱速率和声学歌曲参数。对小鼠在三天缺水期间进行录音。首先在十只自由饮水对照动物中评估基线变异；发声活动和七项声学参数未显示一致的每日趋势。随后在14只接受72小时缺水的小鼠中评估发声活动和声学参数。结果：脱水期间发声活动未下降。基频、声强和音节重复率在脱水后期显著下降，但在恢复供水后向基线恢复。基频和声强的变化与组织水合减少相关的声带生物力学改变一致，而音节重复率降低而音节时长无变化，提示对发声输出的时间控制还有额外影响。结论：这些发现表明全身性脱水影响发声产生的多个组成部分，且发声表现在补液后恢复。
英文摘要
In arid environments or during prolonged drought periods, maintaining hydration becomes increasingly challenging, often requiring organisms to reduce investment in costly behaviors. Vocal performance is sensitive to hydration status because systemic dehydration can alter vocal fold mechanics and reduce vocal efficiency. In many mammals, vocalizations are produced when expiratory airflow induces self-sustained vibration of the vocal folds, making this mechanism vulnerable to systemic water imbalance. This study tested whether dehydration alters singing rate and acoustic song parameters in adult California mice (Peromyscus californicus). Mice were recorded over three days of water deprivation. Baseline variation was first assessed in a control group of ten animals with unrestricted water access; vocal activity and seven acoustic parameters showed no consistent daily trends. Vocal activity and acoustic parameters were then evaluated in 14 mice subjected to 72 h of water deprivation. Vocal activity did not decline during dehydration. Fundamental frequency, sound intensity, and syllable repetition rate decreased significantly during late-stage dehydration but recovered toward baseline after water restoration. Changes in fundamental frequency and sound intensity are consistent with altered vocal fold biomechanics associated with reduced tissue hydration, whereas reduced syllable repetition rate without changes in syllable duration suggests an additional effect on temporal control of vocal output. These findings demonstrate that systemic dehydration affects multiple components of vocal production and that vocal performance recovers following rehydration.