玻璃鼻海豚签名哨声的稳定性和变异性之间的平衡提供了额外信息的潜力
Ekaterina Ovsyanikova1,2, Barry McGovern3, Elizabeth Hawkins4
1School of Veterinary Science, The University of Queensland, Gatton, Queensland 4343, Australia.
The Journal of the Acoustical Society of America
|April 18, 2025
概括
玻璃鼻海豚的签名哨声 (SWs) 在15年内保持稳定,保持身份. 然而,笛子的复杂性和性别影响的变化,表明SWs传达额外的社会信息超越身份.
科学领域:
- 海洋哺乳动物生物声学
- 动物沟通动物沟通
- 行为生态学 行为生态学
背景情况:
- 玻璃鼻海豚 (Tursiops spp.) 在海上生活. 使用个别独特的签名哨子 (SWs) 进行身份信号.
- 保持SW轮稳定性对于可靠的身份识别至关重要.
- 对于SWs编码额外信息的潜力,需要探索哨声变异性.
研究的目的:
- 为了评估长期稳定性瓶鼻海豚签名哨声超过15年的时间.
- 调查哨声的复杂性是否影响SWs的变化程度.
- 探索SW变异性的潜在基于性别的差异.
主要方法:
- 分析了印度太平洋海豚 (2002年和2017-2018年) 的声学记录.
- 使用基本声学参数和视觉检查评估SW轮稳定性.
- 使用已开发的指标量化SW变化和复杂性的量化.
- 统计测试以确定笛子复杂性,性别和可变性之间的关系.
主要成果:
- SW频率轮显示出高的长期稳定性.
- 在15年内,最低频率 (8.8%) 显著下降.
- 显而易见的是SWs的个体变异性,男性的变异性比女性更高.
- 具有更高频率调制的哨子表现出更大的变化.
结论:
- 玻璃鼻海豚签名哨声保持身份功能长期稳定性.
- SWs具有固有的可变性,可以编码上下文信息 (社会/行为).
- 观察到的基于性别的变异性差异表明在社会环境中对SWs的差异性使用.
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