Whistle rates of wild bottlenose dolphins (Tursiops truncatus): influences of group size and behavior.
Whistle rates of wild bottlenose dolphins (Tursiops truncatus): influences of group size and behavior.
复制标题
野生宽吻海豚（Tursiops truncatus）的哨声频率：群体规模和行为的影响。
DOI：
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发表时间：
2008
影响因子：
1.4
通讯作者：
V. Janik
中科院分区：
文献类型：
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作者：
N. Quick;V. Janik
在大型社会群体中，声学通信信号容易被同声信号掩盖。宽吻海豚（Tursiops truncatus）使用非常独特的标志性哨声来对抗掩蔽效应。然而，它们可以在非常大的群体中发现，在那里，被相同的声音掩盖可能是不可避免的。在这项研究中，我们使用被动声学定位来研究野生宽吻海豚的哨声率如何随着群体规模和行为环境的变化而变化。我们发现，当群体规模变大时，个体鸣笛率会下降。海豚在群体成员更分散的情况下，如在社交和非极化运动中，比在协调的水面旅行中表现出更高的哨声率。声学定位表明，许多哨声是由附近的群体产生的，而不是由我们的焦点群体产生的。因此，先前基于单个水听器记录的研究可能高估了哨声率。我们的研究结果表明，尽管宽吻海豚在社交场合鸣笛更多，但它们在大群体中也会减少声音输出，因为其他海豚鸣笛掩盖信号的可能性增加了。
In large social groups acoustic communication signals are prone to signal masking by conspecific sounds. Bottlenose dolphins (Tursiops truncatus) use highly distinctive signature whistles that counter masking effects. However, they can be found in very large groups where masking by conspecific sounds may become unavoidable. In this study we used passive acoustic localization to investigate how whistle rates of wild bottlenose dolphins change in relation to group size and behavioral context. We found that individual whistle rates decreased when group sizes got larger. Dolphins displayed higher whistle rates in contexts when group members were more dispersed as in socializing and in nonpolarized movement than during coordinated surface travel. Using acoustic localization showed that many whistles were produced by groups nearby and not by our focal group. Thus, previous studies based on single hydrophone recordings may have been overestimating whistle rates. Our results show that although bottlenose dolphins whistle more in social situations they also decrease vocal output in large groups where the potential for signal masking by other dolphin whistles increases.