食活动的变化影响了瓶鼻海豚的区域限制搜索行为
Oihane Fernandez-Betelu1, Virginia Iorio-Merlo1, Isla M Graham1
1Lighthouse Field Station, School of Biological Sciences, University of Aberdeen, Lighthouse Field Station, Cromarty IV11 8YL, UK.
Royal Society open science
|June 16, 2023
概括
当海豚遇到更多的猎物时,海豚增加了区域限制搜索 (ARS) 行为. 被动声学和深度学习显示,更高的猎物遭遇率驱动了瓶鼻海豚的这种食策略.
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.
- 动物行为 动物行为
背景情况:
- 区域限制搜索 (ARS) 行为是理解捕食者寻模式的关键.
- 在海洋环境中ARS的驱动因素尚不清楚.
- 被动声学和自动化数据处理为研究提供了新的途径.
研究的目的:
- 使用被动声学研究海豚ARS行为驱动因素.
- 确定海豚是否在遇到猎物后增加在食区的居住时间.
- 将声调与寻找成功联系起来.
主要方法:
- 使用被动声学监测来研究海豚的食.
- 分析了回声定位声和叫声作为食代理.
- 采用一个卷积神经网络用于Bray呼叫识别.
主要成果:
- 在遭遇持续时间和食代理 (回声定位声,叫声) 之间发现了积极的相关性.
- 证明海豚参与ARS行为,以应对增加猎物的可用性.
- 确认的鱼呼叫作为鱼掠食企图的可靠指标.
结论:
- 猎物遭遇率是玻璃鼻海豚ARS行为的一个重要驱动因素.
- 与深度学习相结合的被动声学监测对于研究声乐海洋动物是有效的.
- 这项研究为海洋捕食者的ARS行为驱动因素提供了经验证据.
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