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.



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 described below represent those in the original dataset provided by the provider.
All attributes are included in the downloadable file (CSV or ESRI File Geodatabase) for "Complete Set of Dataset".

Attributes in dataset

Attribute (table column)Description
oidUnique ID number (generated by OBIS-SEAMAP)
seriesDevice ID
obs_dateDate of the recording
obs_timeTime of the recording at UTC
obs_countGroup size (blank; presence only)
sp_tsnTaxonomic Serial Number added by OBIS-SEAMAP
sp_obsSpecies name recorded
dtag_click_indexdefinition not provided
divedefinition not provided
julian_daydefinition not provided
secondsn2yeardefinition not provided
xdefinition not provided
ydefinition not provided
zdefinition not provided
headingdefinition not provided
pitchdefinition not provided
rolldefinition not provided
latitudedefinition not provided
longitudedefinition not provided
depthdefinition not provided
phoneanumberdefinition not provided
phonea_padefinition not provided
phonebnumberdefinition not provided
phoneb_padefinition not provided
phonecnumberdefinition not provided
phonec_padefinition not provided
phonednumberdefinition not provided
phoned_padefinition not provided
phoneenumberdefinition not provided
phonee_padefinition not provided
phonefnumberdefinition not provided
phonef_padefinition not provided
phonegnumberdefinition not provided
phoneg_padefinition not provided
phonehnumberdefinition not provided
phoneh_padefinition not provided
phoneinumberdefinition not provided
phonei_padefinition not provided
phonejnumberdefinition not provided
phonej_padefinition not provided
phoneknumberdefinition not provided
phonek_padefinition not provided
phonelnumberdefinition not provided
phonel_padefinition not provided
phonemnumberdefinition not provided
phonem_padefinition not provided
phonennumberdefinition not provided
phonen_padefinition not provided
phoneonumberdefinition not provided
phoneo_padefinition not provided
geomGeometry field added by OBIS-SEAMAP
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)
Traveled (km)60
Travel hours26
Contr. through
Sharing policy CC-BY (All)
Shared with OBIS*
GBIF (via DOI)*
* Aggregated summary
See metadata in static HTML
See metadata in FGDC XML
See download history / statistics