Characterization and comparison of echolocation clicks of white-beaked dolphins (Lagenorhynchus albirostris) off the Northumberland coast, UK.
Characterization and comparison of echolocation clicks of white-beaked dolphins (Lagenorhynchus albirostris) off the Northumberland coast, UK.
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DOI：
10.1121/10.0003560
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发表时间：
2021-03
期刊：
影响因子：
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通讯作者：
Liangliang Yang;Matt Sharpe;Andrew J. Temple;P. Berggren
中科院分区：
文献类型：
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作者：
Liangliang Yang;Matt Sharpe;Andrew J. Temple;P. Berggren
齿鲸会产生超声波咔哒声以进行导航和觅食。根据点击间隔，这些点击通常被分类为常规点击或嗡嗡声点击。嗡嗡声与觅食行为相关，可以细分为追逐猎物时的缓慢嗡嗡声和捕获猎物时的定期嗡嗡声。这项研究记录了英国诺森伯兰郡海岸的白喙海豚（Lagenorhynchus albirostris）发出的这三种点击类型。计算并比较了三种点击类型的声学参数（包括持续时间、质心频率和均方根带宽）。结果表明，与嗡嗡声点击类型相比，常规点击的持续时间更短，频率更高。与慢速嗡嗡声相比，常规嗡嗡声具有更长的持续时间、更低的频率和更窄的带宽。此外，无论点击类型如何，大约 30% 的点击具有高频 (200-250 kHz) 次峰值，并且 >90% 的点击显示 20 至 80 kHz 之间的频谱峰值和陷波模式。这些发现对于未来对野生白喙海豚回声定位性能的定量评估很有用。所识别的光谱峰和凹口的模式可能有助于该物种的声学识别。
Odontocetes produce ultrasonic clicks for navigation and foraging. These are commonly categorized as regular or buzz clicks based on the inter-click interval. Buzz clicks are linked to foraging behaviors and may be subdivided into slow buzz clicks for prey chase, and regular buzz clicks for prey capture. This study recorded these three click types produced by white-beaked dolphins (Lagenorhynchus albirostris) off the Northumberland coast, UK. Acoustic parameters (including duration, centroid frequency, and root-mean-squared bandwidth) were calculated and compared across the three click types. The results showed that the regular clicks had shorter durations and higher frequencies than both the buzz click types. The regular buzz clicks had longer durations, lower frequencies, and narrower bandwidths than the slow buzz clicks. Additionally, regardless of click type, about 30% of the clicks had high-frequency (200-250 kHz) secondary peaks and >90% of the clicks displayed spectral peak and notch patterns between 20 and 80 kHz. These findings are useful for future quantitative assessment of the echolocation performance of white-beaked dolphins in the wild. The patterns of spectral peaks and notches identified may facilitate for acoustic identification of this species.