DECAF - AUTEC Beaked Whales - Multiple Sensors - DTag
Density Estimation of Cetaceans from passive Acoustic Fixed sensors (DECAF)

Dataset credit



Primary contact Jessica Ward Naval Undersea Warfare Center
Data entry Melissa Soldevilla Duke University



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.



Supplemental information

Each record represents the georeferenced echolocation click of a single tagged whale. Only regular clicks from the tagged whale are included. Time zone is GMT.
Additional attributes include pitch, roll, and heading of the tagged whale and data on presence or absence of detections of each click on nearby seafloor hydrophones.
Data on the presence or absence of DTAG clicks on nearby seafloor hydrophones are available at
Automated and manually verified click detections from 82 seafloor hydrophones in a related dataset are available at

Original data can be downloaded at under Case Study 3: Beaked whale data


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.



Attributes described below represent those in the original dataset provided by the provider.
Only minimum required attributes are visible and downlodable online. Other attributes may be obtained upon provider's permission unless otherwise noted below.

This section explains attributes included in the original dataset. OBIS-SEAMAP restricts the attributes available to the public to date/time, lat/lon and species names/counts only. Should you need other attributes described here, you are encouraged to contact the data provider.

Attributes in dataset provided

Attribute (table column)Description
Marine mammals51,250
Sea turtles0
Rays and sharks0
Other species0
Non spatial0
Non species0
Date, Begin2006-10-23
Date, End2007-09-06
Temporal prec.111111
Latitude24.33 - 24.63
Longitude-77.64 - -77.44
Coord. prec.6 decimal digits
Data typeTelemetry location
TracklinesYES (ID: 686)
Sharing policy CC-BY (All)
Also availalbe from iOBIS
See metadata in static HTML
See metadata in FGDC XML
See download history / statistics