Resonance plays a secondary role in amplifying underwater vocalizations of Weddell seals (Leptonychotes weddellii).

The date are of the highest amplitudes across the frequency range of Weddell seal tonal trills (an underwater call made by males). Each column presents the results of a frequency amplitude measure that is relative to the highest amplitude of that trill, independent of the frequency at which that amplitude occurs. This removes the influence of the overall amplitude of the call which is influence of the distance the sea was from the hydrophone when the recording was made. Four trill patterns were identified (A - D) and a number of trills not included in the analyses are classed as type X. The X call types were excluded because the original recording was later found to be overloaded or partly masked by ice noises or the calls of another seal. Analysis details are included in the accompanying manuscript.


The accompanying Excel file contain the frequency amplitude measurements of individual trills at two location groups: the Aurora Truning location at the anchorage location of the Aurora Australis near Davis and the other group is a number of breeding groups in the Vestfold Hills.

Variable A is the frequency in Hz,

Variables B to DH at the Aurora Turning location and B to BY at the Davis locations are data from individual trills.

Rows 2 or 3 indicate the four Trill patterns, A, B, C or D, with an X designation for trills that were not included in the analyses due to limited frequency ranges or overloading of the original recordings (that was discovered later in the analyses).

ssize or samplesize is the number of trills that were at each frequency bin.

Simple

Identification info

Alternate title
Resonance plays a secondary role in amplifying underwater vocalizations of Weddell seals (Leptonychotes weddellii).
Date (Publication)
2022-10-14
Edition
1
Citation identifier
Dataset DOI

Title
Information and documentation - Digital object identifier system
Date (Publication)
2012-04-23
Citation identifier
ISO 26324:2012

Citation identifier
doi:10.26179/3xm9-fv23

Originator

Terhune, J.M.

Publisher

Australian Antarctic Data Centre

Principal investigator

TERHUNE, JOHN MOORE
Department of Biological Sciences
University of New Brunswick
100 Tucker Park Road
Saint John
New Brunswick
E2L 4L5
Canada

Collaborator

TERHUNE, JOHN MOORE
Department of Biological Sciences
University of New Brunswick
100 Tucker Park Road
Saint John
New Brunswick
E2L 4L5
Canada
Name
CAASM Metadata
Website
https://data.aad.gov.au/metadata/records/ASAC_2122-6

Purpose
This research examined the relative amplitudes of Weddell seal tonal trills as the frequencies (pitch) dropped from ~ 20 kHz down to ~ 40 Hz. Four frequency/amplitude patterns were identified and analyzed separately. Recordings were made from a (likely) single male close to Davis (Aurora Turning designation) and at other breeding locations in the Vestfold Hills (Davis group). For each trill, the maximum amplitudes (dB) at each frequency bin were measured relative to the highest amplitude (adjusted to a nominal 0 dB). The amplitude patterns were searched to identify frequencies that had a higher amplitude than adjacent frequencies (i.e., peaks in the amplitude in a frequency versus amplitude plot), which could indicate that resonance was occurring and preferentially amplifying some frequencies. The wavelengths of frequencies at which the amplitudes showed peaks were determined and matched to chambers in the Weddell seal airway in which resonance (tube closed at both ends) could be occurring. The lengths of the larynx and trachea matched some of the resonant frequencies. This research was published as: Moore, J., and Terhune, J.M. 2022. Resonance plays a secondary role in amplifying underwater vocalizations of Weddell seals (Leptonychotes weddellii). Mar. Mam. Sci. 38: 1508-1523. https://doi.org/10.1111/mms.12935
Status
Completed

Custodian

AU/AADC > Australian Antarctic Data Centre, Australia - AADC, DATA OFFICER (DATA CENTER CONTACT)
Australian Antarctic Division
203 Channel Highway
Kingston
Tasmania
7050
Australia
Topic category
  • Biota
  • Oceans

Extent

N
S
E
W


Extent

Description
Temporal Coverage

Temporal extent

TimePeriod
1997-11-08 1997-12-01
Title
Resonance plays a secondary role in amplifying underwater vocalizations of Weddell seals (Leptonychotes weddellii)
Date (Publication)
2022
Citation identifier
38

Citation identifier
doi:10.1111/mms.12935

Author

Moore, J.L. and Terhune, J.M.
Name
Marine Mammal Science
Page
1508-1523
NASA/GCMD Earth Science Keywords
  • EARTH SCIENCE > ENVIRONMENTAL ADVISORIES > MARINE ADVISORIES > MARINE BIOLOGY
  • EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > MAMMALS > CARNIVORES > SEALS/SEA LIONS/WALRUSES
  • EARTH SCIENCE > OCEANS > SEA ICE > PACK ICE
  • EARTH SCIENCE > CRYOSPHERE > SEA ICE > PACK ICE
Keywords
  • VOCALISATIONS
NASA/GCMD Earth Science Keywords
  • HYDROPHONES
  • Passive Acoustic Recorder
NASA/GCMD Earth Science Keywords
  • FIELD SURVEYS
NASA/GCMD Earth Science Keywords
  • AMD/AU
  • AMD
  • CEOS
NASA/GCMD Earth Science Keywords
  • GEOGRAPHIC REGION > POLAR
  • CONTINENT > ANTARCTICA > VESTFOLD HILLS
  • CONTINENT > ANTARCTICA > DAVIS

Resource constraints

Use limitation
This metadata record is publicly available.

Resource constraints

Access constraints
licence
Other constraints
These data are publicly available for download from the provided URL.

Resource constraints

File type
Portable Network Graphic
Linkage
Creative Commons by Attribution logo

Title
Attribution 4.0 International (CC BY 4.0)
Website
https://creativecommons.org/licenses/by/4.0/legalcode

Legal code for Creative Commons by Attribution 4.0 International license

Use constraints
licence
Other constraints
This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_2122-6 when using these data. These data are publicly available for download from the provided URL
Language
English
Character encoding
UTF8

Distribution Information

Distributor

Distributor

AU/AADC > Australian Antarctic Data Centre, Australia - AADC, DATA OFFICER (DATA CENTER CONTACT)
Australian Antarctic Division
203 Channel Highway
Kingston
Tasmania
7050
Australia

Distributor

Fees
Free
Planned available datetime
2022-10-14T00:00:00

Distributor

Fees
Free
Planned available datetime
2022-10-14T00:00:00
Units of distribution
kb
Transfer size
464
Distribution format
  • Excel

Units of distribution
MB
Transfer size
1.3
Distribution format
  • PDF

OnLine resource
GET DATA > DIRECT DOWNLOAD

Download the dataset.

OnLine resource
PROJECT HOME PAGE

Public information for AAS project 2122

OnLine resource
VIEW RELATED INFORMATION > PUBLICATIONS

Access a copy of the publication (AAD Staff only)

OnLine resource
VIEW RELATED INFORMATION

Citation reference for this metadata record and dataset.

Resource lineage

Statement
Recordings at the Aurora Turning site were made on an opportunistic basis on 1 and 8 December 1997 at 68.5699S, 77.9266E. This site was 1.55 km from the shoreline at Davis Station, eastern Antarctica. The water depth was 23m. The 2-m-thick-land-fast sea ice in the recording area had previously been broken up and refrozen following the arrival of the R.S.V. Aurora Australis during the station resupply 2 months earlier. There were at least five adult Weddell seals (two of each sex and one whose sex was unknown) using the haul-out holes. Recordings at other locations in the Vestfold Hills were made in November and December 1997. For more information, see the referenced paper. Only Trills that were had sinusoidal waveforms, were not masked by other seal calls or ice noises and were not distorted by too low a recording level were included in the analyses.
Hierarchy level
Dataset
Maintenance and update frequency
As needed
Maintenance note
2022-10-13 - record created by John Terhune.

Metadata

Metadata identifier
string/ASAC_2122-6

Language
English
Character encoding
UTF8

Sponsor

Australian Antarctic Division

Owner

AADC
Title
Parent Metadata Record
Citation identifier
ASAC_2122

Type of resource

Resource scope
Dataset

Alternative metadata reference

Title
gov.nasa.gsfc.gcmd
Citation identifier
d346f081-f735-4997-aa92-ea84ee60173e

Alternative metadata reference

Title
gov.nasa.gsfc.gcmd
Date (Last Revision)
2022-10-14T13:54:49

Identifier

Description
metadata.extraction_date

Alternative metadata reference

Title
gov.nasa.gsfc.gcmd
Citation identifier
8.6

Metadata linkage
http://data.aad.gov.au/metadata/records/ASAC_2122-6

Point of truth for the metadata record

Date info (Creation)
2022-10-13T00:00:00
Date info (Last Update)
2022-10-14

Metadata standard

Title
ISO 19115-3
Edition
2014
Other citation details
Version 1
Title
DIF to ISO 19115-1 Profile
 
 

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