The foe you know: Observations of interspecific interactions between small cetaceans and northern resident killer whales (Orcinus orca) in the northeast Pacific

We documented the first aerial observations of interspecific interactions of fish-eating, northern resident killer whales (Orcinus orca) with two small cetacean species, Dall’s porpoises (Phocoenoides dalli) and Pacific white-sided dolphins (Lagenorhynchus obliquidens), off northeastern Vancouver Island, (British Columbia, Canada). Specifically, we used drone-collected data to compare observations of porpoises and dolphins interacting with northern resident killer whales to understand factors which may promote interspecific interactions. From 2018 to 2021, 42 interactions were opportunistically recorded of Dall’s porpoises (19%), Pacific white-sided dolphins (74%), and both species (7%) approaching groups of travelling, milling, socializing, and resting northern resident killer whales. The mean group size of killer whales during interactions with dolphins (an average of 8 killer whales) and porpoises (an average of 3 killer whales) was significantly different. Porpoises interacted only ..., , # The foe you know: Observations of interspecific interactions between small cetaceans and northern resident killer whales (*Orcinus orca*) in the northeast Pacific Dataset DOI: [10.5061/dryad.2bvq83c2c](10.5061/dryad.2bvq83c2c) ## Description of the data and file structure The Foe You Know: Observations of interspecific interactions between small cetaceans and northern resident killer whales (Orcinus orca) in the northeast Pacific **Authors** Brittany C. Visona-Kelly and Lance G. Barrett-Lennard **Purpose** Supplementary video files to accompany the publication titled above. **Usage Restrictions** The video files are published under the terms of the [CC0 waiver](https://creativecommons.org/publicdomain/zero/1.0/). Please contact the lead author if you have any questions (see contact information below). **Citation** Visona-Kelly, B. C., & Barrett-Lennard, L. G. 2025. The Foe You Know: Observations of interspecific interactions between small cetaceans and northern resident kill...,我们首次记录了加拿大不列颠哥伦比亚省温哥华岛东北海域内，食鱼性北太平洋居留型虎鲸（Orcinus orca）与两种小型鲸类——德尔氏鼠海豚（Phocoenoides dalli）及太平洋斑纹海豚（Lagenorhynchus obliquidens）之间的种间交互的航空观测数据。具体而言，本研究借助无人机采集的数据，对比分析鼠海豚与海豚同北太平洋居留型虎鲸的交互观测结果，以探究可能促进种间交互的影响因素。2018年至2021年间，我们共偶遇式记录到42起小型鲸类趋近虎鲸群的交互事件，其中德尔氏鼠海豚相关事件占19%、太平洋斑纹海豚相关事件占74%，同时趋近两种小型鲸类的事件占7%；被趋近的虎鲸群状态涵盖巡游、集群绕游、社交及休憩。交互期间，与海豚发生交互的虎鲸平均群规模（约8头）与与鼠海豚发生交互的虎鲸平均群规模（约3头）存在显著差异。鼠海豚仅可与…… # 《知己知彼：东北太平洋小型鲸类与北太平洋居留型虎鲸（Orcinus orca）的种间交互观测》 数据集DOI：[10.5061/dryad.2bvq83c2c](10.5061/dryad.2bvq83c2c) ## 数据与文件结构说明 《知己知彼：东北太平洋小型鲸类与北太平洋居留型虎鲸的种间交互观测》 **作者** Brittany C. Visona-Kelly与Lance G. Barrett-Lennard **研究用途** 本数据集为上述同名发表论文的配套补充视频文件。 **使用限制** 本视频文件采用[CC0许可协议](https://creativecommons.org/publicdomain/zero/1.0/)发布，如有疑问请联系通讯作者（联系方式见下文）。 **引用格式** Visona-Kelly, B. C., & Barrett-Lennard, L. G. 2025. 《知己知彼：东北太平洋小型鲸类与北太平洋居留型虎鲸的种间交互观测》...