DECAF - PMFR Minke Whales - Multiple Sensor - Boing Localizations
Density Estimation of Cetaceans from passive Acoustic Fixed sensors (DECAF)

Dataset credit

N/A

Contacts

RoleNameOrganization 
Primary contact Steve Martin SPAWAR Systems Center Pacific
Data entry Melissa Soldevilla Duke University

Abstract

Early efforts dealing with acoustic data from PMRF involved both manual detection (data set 666 and manual localization (this data set) of boing sounds. These manual detections and localizations provided information necessary in order to assess performance of the automated boing detector and to help understand how to better automatically both detect, associate and localize boing sound source locations. Manual validation of automatic processes is much more efficient (in time and dollars) than the total manual effort such as performed in data sets 666 and 675.

Twenty four boing vocalizations were localized in all – individual animals may make multiple calls. Of these, it is suspected that multiple boings were detected and localized from the same individuals at different times.

This analysis was conducted by James Yosco (Science Applications International Corporation). Localization accuracy for points shown within 15km of sensors is on the order of tens, to hundreds, of meters while the two localizations shown to the extreme north have errors which can be over tens of km. Times are in GMT. Hydrophone locations are only approximate.

The detailed results of the analysis are available at the DECAF web site shown in the supplemental information section.

Purpose

This dataset used multiple hydrophones at PMRF, Kauai, Hawaii, to localize minke whale boing vocalizations manually. This was a precursor to development of automated detection algorithms and automated association processes. This data set provided a quasi ground truth for development and performance assessment of the minke boing detector developed in the DECAF project. The ultimate purpose of the project was to estimate the density of the boing vocalizations in order to gain more understanding of the minke whale presence in Hawaiian waters. In order to estimate density of whales, the average boing rate of a minke whale is required.

Supplemental information

This dataset is part of a larger project examining Balaenoptera acutorostrata (minke whale) vocalizations at the Pacific Missile Range Facility (PMRF). Related datasets include: 1) Results from a prior manual detection (http://seamap.env.duke.edu/dataset/666) and manual localization (http://seamap.env.duke.edu/dataset/675) of 24 boing sources; 2) Results of automated boing detections for 14 hydrophones over 12 days in early 2006 (http://seamap.env.duke.edu/dataset/668); and 3) Results for boing associations over an exploratory 1 hr of data (ten min each from three separate days in Mar 2006 and two separate days in Apr 2007) and for 2 hrs of sample data from 12 days of data in Feb, Mar, Apr of 2006 (http://seamap.env.duke.edu/dataset/664 ).


Original data can be downloaded at http://www.creem.st-and.ac.uk/decaf/decaf-data-files under Case Study 1b: Minke whale data.


Observed call types labeled cries and chirps in the downloaded data represent boings.

References

  • Martin, S., T. Marques, L. Thomas, R. Morrissey, S. Jarvis, N. DiMarzio, D. Moretti & D. Mellinger. 2013. Estimating minke whale (Balaenoptera acutorostrata) boing vocalization density using passive acoustic sensors. Marine Mammal Science. 29, 142–158

Attributes

Overview

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
oidOBIS-SEAMAP dataset ID
filename
file_start_date_time
tenminsetnumber
time
phone_number
sp_obsSpecies observed
obs_calltype
frequency_area_khz
occurance
duration
localization__degrees_k_ft
other
comments
localization_x
localization_y
same_animal
noise
sp_tsnITIS species code
obs_timeObservation time (GMT)
boingstartdatetime
obs_dateObservation date (GMT)
near_hydrophone_latitude
near_hydrophone_longitude
near_hydrophone_depth
latitudeApproximate calling animal latitude
longitudeApproximate calling animal longitude
obs_countNumber of calls
obs_countNumber of calls
OBIS-SEAMAP ID675
Seabirds0
Marine mammals23
Sea turtles0
Total23
Date, Begin2006-02-25
Date, End2006-03-13
Temporal prec.111111
Latitude22.32 - 23.91
Longitude-160.42 - -159.69
Coord. prec.6 decimal digits
PlatformStation
Data typeAcoustic - #call
EffortYES (ID: 676)
Registered2010-11-12
Updated2011-11-23
StatusPublished
Permission to use No permission to get additional attributes
1