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Updated: Jul 16, 2025

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A Low Cost Setup for Behavioral Audiometry in Rodents
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在 odobenid 和 otariid 肉食动物中,听觉掩饰是肉食的
Ryan A Jones1, Jillian M Sills2, Mitzi Synnott3
1Department of Ocean Sciences, University of California Santa Cruz, Santa Cruz, California 95064, USA.
The Journal of the Acoustical Society of America
|September 15, 2023
概括
海和海狮表现出明显的空气传递声音听觉敏感性,海在较低的频率和海狮在更高的频率上表现出色. 这两种物种都表现出相似的能力,在杂的环境中检测声音.
科学领域:
- 海洋生物学 海洋生物学
- 生物声学是一种生物声学.
- 听觉科学是一种听觉科学.
背景情况:
- 海 (Odobenus rosmarus) 是唯一的活生生的 odobenids,缺乏近亲可用于听觉比较.
- 像海狮和毛皮海这样的类动物,代表了理解 odobenid 听觉的最接近的进化外群.
研究的目的:
- 为了研究和比较海和加利福尼亚海狮 (Zalophus californianus) 的空中听觉能力.
- 在 odobenid 和 otariid 两种谱系中推进听觉的理解.
主要方法:
- 在两只海和一只加利福尼亚海狮身上进行了行为声测试.
- 在环境和掩盖噪声条件下,在一个频率范围 (0.0816 kHz) 中测量了空中声音检测值.
- 计算了关键比率来评估噪音中的听觉过.
主要成果:
- 海在低频率时表现出更大的敏感性,而海狮在高频率时表现出更大的敏感性.
- 海的临界比率在20dB (0.2kHz) 到32dB (10kHz) 之间.
- 海狮的临界比率在16dB (0.2kHz) 到35dB (32kHz) 之间,与陆地食肉动物相当.
结论:
- 尽管听力范围和灵敏度不同,但海和海狮在杂的环境中听力能力相似.
- 在 odobenids 和 otariids 中,听觉掩盖能力与在陆地食肉动物中观察到的相似.
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