https://doi.org/10.82144/23d88966 https://seamap.env.duke.edu/dataset/677 Jessica Ward Naval Undersea Warfare Center Primary contact jessica.ward@navy.mil OBIS-SEAMAP Marine Geospatial Ecology Lab, Duke University

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seamap-contact@duke.edu https://seamap.env.duke.edu OBIS-SEAMAP Marine Geospatial Ecology Lab, Duke University

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seamap-contact@duke.edu https://seamap.env.duke.edu distributor Jessica Ward Naval Undersea Warfare Center Primary contact jessica.ward@navy.mil owner 2025-07-31 eng Original provider: Density Estimation of Cetaceans from passive Acoustic Fixed sensors (DECAF) Abstract: This archive contains data on echolocation clicks of Blainville's beaked whale (Mesoplodon densirostris) recorded at AUTEC during a 6-day period in spring 2005. The data were used in estimating M. densirostris density as documented in the paper Marques et al. (2009). There are data files containing click counts per minute per hydrophone, files containing numbers of false positive detections from a manual analysis, and files giving information about georeferenced tracks of tagged whales and associated vocalization timings. Marine Biology Passive acoustic detection Marine Animal Survey Marine mammals Acoustic calls Ocean-based Platforms N/A Each record (observation) represents number of clicks detected during one minute at one of 82 hydrophones. Species identification for automatic click detections is unknown and are assigned as Odontocete. Manually verified click detections have been assigned to appropriate family or genus by a trained acoustician for a sample of thirty 10-minute files. Manually-verified non-biological sources are recorded to species nan. Some automated detections may be from non-biological sources; False detection analysis suggest this will occur <3% of the time. The effect of occasional system tests and differences in frequency response of hydrophones on automated detection and classification has not been quantified. Time zone is GMT. Hydrophone locations are only approximate. Related datasets from tagged beaked whales are available at http://seamap.env.duke.edu/dataset/685 and http://seamap.env.duke.edu/dataset/722. Original data can be downloaded at http://www.creem.st-and.ac.uk/decaf/decaf-data-files under Case Study 3: Beaked whale data This work is licensed under a Creative Commons Attribution (CC-BY) 4.0 License. https://seamap.env.duke.edu/dataset/677 Oceans -77.6399427 -77.3866278 24.7580347 24.3048783 2005-04-26 2005-05-02 Scientific names are based on the Integrated Taxonomic Information System (ITIS). family Delphinidae Dolphins family Hyperoodontidae Beaked whales suborder Odontoceti Toothed whales species Physeter macrocephalus Sperm whale notPlanned Jessica Ward Naval Undersea Warfare Center Primary contact jessica.ward@navy.mil NA NA NA Jessica Ward owner NA zd_677 2025-07-31T14:35:15-04:00 dataset Ward, J. 2018. DECAF - AUTEC Beaked whales - Multiple Sensors - Click counts. Version 1.0.0. Dataset published in OBIS-SEAMAP. https://doi.org/10.82144/23d88966. OBIS-SEAMAP Dataset Page UTF-8 Interactive map https://seamap.env.duke.edu/dataset/677 FGDC Metadata UTF-8 XML https://seamap.env.duke.edu/dataset/677/fgdc EML Metadata UTF-8 XML https://seamap.env.duke.edu/dataset/677/eml OBIS-SEAMAP zd_677 zd_677 Marques, T.A., L. Thomas, J. Ward, N. DiMarzio, P. L. Tyack. 2009. Estimating cetacean population density using fixed passive acoustic sensors: An example with Blainville’s beaked whales. Journal of the Acoustical Society of America: 125(4): 1982-1994.