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