DECAF - AUTEC Beaked Whales - Multiple Sensors - DTag Seafloor array presence

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 ecolocation 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 a click detection on a seafloor array hydrophone from a single tagged whale. The click association to the DTAG click is 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

Time zone is GMT


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
oidOBIS-SEAMAP dataset ID
seriesDTag ID of associated click (SpeciesYear_Julianday)
obs_dateObservation date (GMT)
obs_timeObservation time (GMT)
obs_countNumber of calls
sp_tsnITIS species code
sp_obsSpecies observed
diveDTAG deep dive number
yeardefinition not provided
julian_daydefinition not provided
secondsn2yeardefinition not provided
hydrophonedefinition not provided
presence_absencedefinition not provided
xdefinition not provided
ydefinition not provided
zdefinition not provided
headingdefinition not provided
pitchdefinition not provided
rolldefinition not provided
associated_dtag_click_indexIndex of associated click on DTag (dataset 685)
latitudeApproximate hydrophone latitude
longitudeApproximate hydrophone longitude
depthApproximate hydrophone depth
geomdefinition not provided
Marine mammals27,086
Sea turtles0
Rays and sharks0
Other species0
Non spatial0
Non species0
Date, Begin2006-10-23
Date, End2007-09-06
Temporal prec.111111
Latitude24.32 - 24.66
Longitude-77.64 - -77.41
Coord. prec.6 decimal digits
Data typeAcoustic - #call
EffortYES (ID: 723)
Traveled (km)0
Travel hours53
Contr. through
Sharing policy CC-BY (All)
Shared with None
See metadata in static HTML
See metadata in FGDC XML
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