DECAF - AUTEC Sperm Whales - Multiple Sensors - Samples

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This archive contains data on sperm whales (Physeter macrocephalus) recorded at the Atlantic Undersea Test and Evaluation Center (AUTEC) in the Tongue of the Ocean, Bahamas in August-September 2007. Data are provided showing when sperm whales were detected on the range during the time period, details about the availability of the acoustic data used in the analysis and finally, the number and size of sperm whale groups localized.
Records in this dataset represent a sample of data used in the sperm whale group localizations. Fifty 10-minute periods were randomly subsampled from the available acoustic files, and clicking animals were localized, where possible. By chance, some 10-minute periods did not contain any sperm whale clicks.

This dataset used multiple hydrophones at AUTEC to detect sperm whale clicks. Click trains from individual whales were identified, enabling the number of diving whales to be estimated. Assuming that all diving sperm whale groups at a given time are detected by AUTEC, then density of diving sperm whales can be estimated.

Records in this dataset represent the sample of data used in the sperm whale group localizations. Each record represents the detection of a whale on a given hydrophone. A single whale may be heard on multiple hydrophones, as indicated in series.
The related dataset describing when sperm whales were detected on the range is available at http://seamap.env.duke.edu/dataset/682.

Original data can be downloaded at http://www.creem.st-and.ac.uk/decaf/decaf-data-files under Case Study 2: Sperm whale data

Time zone is GMT.
Hydrophone locations are approximate.

Overview

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
oid	Unique ID number (generated by OBIS-SEAMAP)
station_id	definition not provided
series	definition not provided
sp_tsn	Taxonomic Serial Number added by OBIS-SEAMAP
sp_obs	Species name recorded
calldatetime	definition not provided
obs_date	Date of the recording
obs_time	Time of the recording at UTC
latitude	Latitude in decimal degrees
longitude	Longitude in decimal degrees
depth	Botom depth in meters
obs_count	Group size (blank; presence only)
datarowid	definition not provided
set	definition not provided
song	definition not provided
segment	definition not provided
secondsin	definition not provided
start_date	Start date
start_day_time	definition not provided
mmammal_sw_hyds	definition not provided
hyds_processed	definition not provided
on_1_off_0_range	definition not provided
number_of_whales_present_based_on_chain_evaluation	definition not provided
hyds_evaluated_with_run_sep__nchains_	definition not provided
no_whales_localized_group_1_	definition not provided
no_whales_localized_group_2_	definition not provided
geom	Geometry field added by OBIS-SEAMAP