Harbour porpoises are flexible predators displaying context dependent foraging behaviours

Opportunistic mobile predators can adapt their behaviour to specific foraging scenarios, allowing them to target diverse prey resources. An interesting example is the harbour porpoise (Phocoena phocoena), a marine mammal with a huge energy demand feeding on a large variety of fish, squid and shrimps. Little is known about the foraging behaviour of harbour porpoises, as observations of wild specimens are notoriously difficult to obtain. In this study, foraging was identified in almost 60% of videos from UAV recordings in Danish coastal waters during daylight hours. Observations reveal them to be flexible predators, foraging on both single fish and schools of fish, as well as individually and in groups of varying size. We argue that some of the observed behavioural adaptations and context-dependent strategies for prey capture are based on information transfer and social learning. Our results provide unprecedented insights into the foraging behaviour of an opportunistic mammalian predator...., , , **README for Data_Stedt_2024.xlsx and Video_supplement_Stedt_2024.mp4**
This readme file was generated on 2024-06-19 by Johanna Stedt
Last updated 2024-11-26

**Data_Stedt_2024.xlsx**
Extracted data from UAV recordings of harbour porpoises
 
**Video_supplement_Stedt_2024.mp4**
Video examples of the observed behaviours and foraging techniques described in Stedt et al. (2024)

Dataset and video file accompanies the paper
Stedt J., Hamel H., Torres Ortiz S., Højer Kristensen J. & Wahlberg M. (2024) Harbour porpoises are flexible predators displaying context dependent foraging behaviours. Ecology and Evolution.

**GENERAL INFORMATION**
Author/Principal Investigator Information
Name: Johanna Stedt
ORCID: 0000-0002-0994-9023
Institution: Lund University
Address: Department of Biology, SE-223 62 Lund, Sweden
Email: [[e-mail]](mailto:[e-mail])

Period of data collection: September 2015 to September 2023

Method of data collection: quadcopter UAVs from the DJI...

机会性移动捕食者可根据特定觅食场景调整自身行为，以此靶向多样化的猎物资源。颇具研究代表性的案例为港湾鼠海豚（*Phocoena phocoena*，Harbour Porpoise）——这是一类能量需求极高的海洋哺乳动物，以丰富多样的鱼类、鱿鱼与虾类为食。由于野生个体的观测难度极高，学界对港湾鼠海豚的觅食行为所知甚少。本研究基于丹麦近岸水域日间无人机（Unmanned Aerial Vehicle, UAV）录制的影像，在近60%的视频片段中识别到了觅食行为。观测结果显示，该类捕食者具备极强的行为灵活性：既可单独捕食单条鱼类，也可集群猎捕鱼群；既会独自行动，也会在不同规模的群体中协作觅食。我们认为，部分观测到的行为适应性与依赖环境的猎物捕获策略，依托信息传递与社会学习得以实现。本研究结果为理解机会性哺乳类捕食者的觅食行为提供了前所未有的视角。

**Data_Stedt_2024.xlsx 与 Video_supplement_Stedt_2024.mp4 说明文档**
本说明文档于2024年6月19日由约翰娜·施特德特（Johanna Stedt）生成，最后更新于2024年11月26日。

**Data_Stedt_2024.xlsx**
从港湾鼠海豚的无人机录制影像中提取的相关数据。

**Video_supplement_Stedt_2024.mp4**
展示Stedt等人（2024）研究中描述的观测行为与觅食技巧的示例视频。

本数据集与视频文件配套支持以下论文：
Stedt J., Hamel H., Torres Ortiz S., Højer Kristensen J. & Wahlberg M. (2024) 港湾鼠海豚为灵活捕食者，展现出依赖环境的觅食行为。*Ecology and Evolution*（《生态学与进化》）。

**基本信息**
作者/项目负责人信息
姓名：约翰娜·施特德特（Johanna Stedt）
ORCID：0000-0002-0994-9023
所属机构：隆德大学（Lund University）
通讯地址：瑞典隆德市生物系，SE-223 62
电子邮箱：[e-mail]

数据采集周期：2015年9月至2023年9月

数据采集方法：使用大疆（DJI）旗下的四旋翼无人机……