Dataset Authors

John Hildebrand


This dataset contains individual detections of Risso's dolphin (Grampus griseus) and presumed pantropical spotted dolphin (Stenella attenuata) echolocation clicks from a site near the Dry Tortugas (25.537°N 84.632°W, depth 1220 m) in the Gulf of Mexico.


Supplemental Information

The dataset is organized by species. Dataset file sp180428_DT_07B.xml contains the detections for pantropical spotted dolphin and sp180457_DT_07B.xml contains the detections for Risso's Dolphin. The following is a list of data parameters found in the dataset files: Start – GMT dateTime that the detection was recorded (YYYY-MM-DDThh:mm:ss); Channel – Non-negative integer that refers to the channel number used. This refers to the channel of the data, which does not necessarily correspond to sensor position within an array (int); SpeciesID – Taxonomic serial numbers from the Integrated Taxonomic Information System ( SpeciesID 180428 = pantropical spotted dolphin (Stenella attenuata), SpeciesID 180457 = Risso's Dolphin (Grampus griseus); Call – Type of call detected (clicks); ReceivedLevel_dB – The received level of the call (dB re 1 μPa);|Passive acoustic monitoring was conducted with High-frequency Acoustic Recording Packages. These data were scanned for delphinid clicks using a combination of computer algorithms and manual (analyst) scanning of the waveform and spectral data.|High-frequency Acoustic Recording Packages|200 kHz sample rate at three sites|Less than 5 percent false detection rate.|


This dataset was developed to assess the population of dolphins in the Gulf of Mexico at the time and following the Deepwater Horizon oil spill.


Marine mammals, passive acoustic monitoring, dolphins, delphinids, Pantropical Spotted Dolphin, Stenella attenuata, Risso's dolphin, Grampus griseus




April 2017

Point of Contact


John A. Hildebrand


University of California San Diego / Scripps Institution of Oceanography

Funding Source




Rights Information

Creative Commons License
This work is licensed under a Creative Commons Public Domain Dedication 1.0 License.