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Repetition patterns in Weddell seal (Leptonychotes weddellii) underwater multiple element calls

Created 23/06/2025

Updated 23/06/2025

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Many vocalisations produced by Weddell seals (Leptonychotes weddellii) are made up of repeated individual distinct sounds (elements). Patterning of multiple element calls was examined during the breeding season at Casey and Davis, Antarctica. Element and interval durations were measured from 405 calls all greater than 3 elements in length. The duration of the calls (22 plus or minus 16.6s) did not seem to vary with an increasing number of elements (F4.404 = 1.83, p = 0.122) because element and interval durations decreased as the number of elements within a call increased. Underwater vocalisations showed seven distinct timing patterns of increasing, decreasing, or constant element and interval durations throughout the calls. One call type occurred with six rhythm patterns, although the majority exhibited only two rhythms. Some call types also displayed steady frequency changes as they progressed. Weddell seal multiple element calls are rhythmically repeated and thus the durations of the elements and intervals within a call occur in a regular manner. Rhythmical repetition used during vocal communication likely enhances the probability of a call being detected and has important implications for the extent to which the seals can successfully transmit information over long distances and during times of high level background noise. See other metadata records and datasets associated with ASAC project 2122 (ASAC_2122) for further information. The fields in this dataset are: Tape/Site/File Filename Call Type Total Number of Elements Attribute Frequency Time Casey Davis

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Field Value
Title Repetition patterns in Weddell seal (Leptonychotes weddellii) underwater multiple element calls
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/b9ae7454-0e5c-4145-9b93-e60a269ae4bc
Contact Point
Australian Ocean Data Network
metadata@aad.gov.au
Reference Period 21/10/1997 - 01/12/1997
Geospatial Coverage
Map data © OpenStreetMap contributors

{
  "coordinates": [
    72.0,
    -68.0
  ],
  "type": "Point"
}
Data Portal Australian Oceans Data Network

Data Source

This dataset was originally found on Australian Oceans Data Network "Repetition patterns in Weddell seal (Leptonychotes weddellii) underwater multiple element calls". Please visit the source to access the original metadata of the dataset:
https://catalogue.aodn.org.au/geonetwork/srv/eng/csw/dataset/repetition-patterns-in-weddell-seal-leptonychotes-weddellii-underwater-multiple-element-calls