Bottlenose dolphins (Tursiops truncatus) increase number of whistles when feeding
Bottlenose dolphins (Tursiops truncatus) increase number of whistles when feeding
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DOI：
10.1578/am.30.3.2004.357
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发表时间：
2004-01-01
期刊：
影响因子：
1.2
通讯作者：
Stienessen, Sarah C.
中科院分区：
文献类型：
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作者：
Acevedo-Gutierrez, Alejandro;Stienessen, Sarah C.
我们研究了这样一个假设：海豚在进食过程中会提高发声率以招募新个体。我们在哥斯达黎加科科岛附近录制了 135.5 分钟的宽吻海豚 (Tursiops truncatus) 的水下声音。从八个喂养组和三个非喂养组收集数据。我们将声音分类为口哨声、咔嗒声或脉冲串。进食组中每只海豚每分钟的口哨数量高于非进食组。海豚进食时发出的口哨声比咔哒声或脉冲爆发还要多。另一方面，当海豚不进食时，每种声音类型所产生的比例没有差异。新的海豚加入了我们录制海豚声音的喂食活动。结果支持了这样的假设：海豚群体规模随着同种动物口哨数量的增加而增加。然而，需要考虑混杂因素，例如使用特定的喂食呼叫，以支持声音速率增加的假设。
We examined the hypothesis that dolphins increase their rate of sound production during feeding events to recruit new individuals. We recorded 135.5 min of underwater sounds from bottlenose dolphins (Tursiops truncatus) near Isla del Coco, Costa Rica. Data were collected from eight feeding groups and three nonfeeding groups. We classified sounds as whistles, click trains, or pulse bursts. The number of whistles per min per dolphin was higher in feeding groups than in nonfeeding groups. More whistles than click trains or pulse bursts were produced when dolphins were feeding. On the other hand, there was no difference in the proportion of each sound type produced when dolphins were not feeding. New dolphins joined the feeding events for which we recorded dolphin sounds. Results supported the hypothesis that dolphin group size increases in response to an increase in the number of whistles by conspecifics; however, confounding factors, such as the use of specific feeding calls, need to be accounted for to support the increased sound-rate hypothesis.