Dataset of Acoustic Recordings of Bottlenose Dolphins Collected During Boat-Based Encounters Using HydroMoth Devices, Event 006 (2024-12-01)

Acoustic recordings of bottlenose dolphins collected during boat-based encounters using HydroMoth devices and analysed with PAMGuard This dataset comprises 8 minutes of underwater acoustic recordings of a group of bottlenose dolphins (Tursiops truncatus). The vocalisations were recorded on 1 December 2024, approximately 5.3 miles off the coast of Vilanova i la Geltrú (Catalonia, Spain), in the northwestern Mediterranean Sea. The recordings were collected during boat-based cetacean encounters using a HydroMoth recorder (AudioMoth Firmware Basic v1.11.0), with the support of team members and volunteers from the Institut de Ciències del Mar (CSIC) and Associació Cetàcea. The navigation spanned approximately 9 hours, from 2024-12-01T07:07:12 (UTC) to 2024-12-01T16:51:00 (UTC). The first visual encounter with the group of Bottlenose dolphins occurred around 09:34:00 (UTC+1). The motor was turned off after the encounter. The resulting recording were analysed using the open-source software PAMGuard (v2.02.16; DOI: 10.5281/zenodo.15056259). Whistles were classified with the ROCCA (Real-time Odontocete Call Classification Algorithm) delphinid whistle module, integrated into PAMGuard (https://github.com/ProjectROCCA/ROCCA). Clicks were manually categorized in the PAMGuard Viewer as echolocation clicks, burst-pulse sounds, or click trains. This dataset and its analysis includes comprehensive data covering the full recording session, structured according to the Darwin Core terms SamplingEvent, Occurrence, ExtendedMeasurementsAndFacts, and SimpleMultimedia. This dataset is also available through GBIF at: https://doi.org/10.15470/77bhey宽吻海豚声学录音数据集：基于船基鲸类观测活动采集，使用HydroMoth设备录制，经PAMGuard软件分析。 本数据集包含一段时长8分钟的宽吻海豚（*Tursiops truncatus*）群体水下声学录音。 该录音于2024年12月1日录制，采集地点位于西班牙加泰罗尼亚自治区维拉诺瓦-拉赫尔特鲁海岸外约5.3英里的西北地中海海域。本次录音依托船基鲸类观测活动开展，使用搭载AudioMoth Basic v1.11.0固件的HydroMoth录音机完成采集，得到西班牙海洋科学研究所（CSIC）与Cetàcea鲸类协会的团队成员及志愿者的支持。 本次航行时长约9小时，时间范围为协调世界时（UTC）2024-12-01T07:07:12至2024-12-01T16:51:00。首次目视观测到宽吻海豚群体的时间约为UTC+1时区的09:34:00，观测结束后关停了船用发动机。 所获录音通过开源软件PAMGuard（v2.02.16；DOI：10.5281/zenodo.15056259）完成分析。其中，海豚哨声通过集成于PAMGuard的ROCCA模块（实时齿鲸叫声分类算法，Real-time Odontocete Call Classification Algorithm）进行分类，该模块的开源地址为https://github.com/ProjectROCCA/ROCCA。咔声则在PAMGuard查看器中被手动划分为回声定位咔声、爆发脉冲声或咔声串。本数据集及其分析成果涵盖完整录音时段的全量数据，并按照达尔文核心（Darwin Core）术语体系中的SamplingEvent、Occurrence、ExtendedMeasurementsAndFacts及SimpleMultimedia进行结构化组织。 本数据集亦可通过全球生物多样性信息设施（GBIF）获取，访问地址为：https://doi.org/10.15470/77bhey