From Australian Oceans Data Network
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Resonance plays a secondary role in amplifying underwater vocalizations of Weddell seals (Leptonychotes weddellii).

Created 24/06/2025

Updated 24/06/2025

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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.

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Additional Info

Field Value
Title Resonance plays a secondary role in amplifying underwater vocalizations of Weddell seals (Leptonychotes weddellii).
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/c3c1aedd-2612-4532-80c4-425eef51b952
Contact Point
Australian Ocean Data Network
metadata@aad.gov.au
Reference Period 08/11/1997 - 01/12/1997
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        76.89844,
        -69.02823
      ],
      [
        79.89844,
        -69.02823
      ],
      [
        79.89844,
        -68.02823
      ],
      [
        76.89844,
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      ],
      [
        76.89844,
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      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Australian Oceans Data Network

Data Source

This dataset was originally found on Australian Oceans Data Network "Resonance plays a secondary role in amplifying underwater vocalizations of Weddell seals (Leptonychotes weddellii).". Please visit the source to access the original metadata of the dataset:
https://catalogue.aodn.org.au/geonetwork/srv/eng/csw/dataset/resonance-plays-a-secondary-role-in-amplifying-underwater-vocalizations-of-weddell-seals-lepton