Vocalizations of male bearded seals, Erignathus barbatus: classification and geographical variation

@article{Risch2007VocalizationsOM,
  title={Vocalizations of male bearded seals, Erignathus barbatus: classification and geographical variation},
  author={Denise Risch and Christopher W. Clark and Peter J. Corkeron and Andreas Elepfandt and Kit M. Kovacs and Christian Lydersen and Ian Stirling and Sofie M. Van Parijs},
  journal={Animal Behaviour},
  year={2007},
  volume={73},
  pages={747-762}
}
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The results suggest that bearded seals may be relatively sedentary and that geographically different vocal repertoires may be characteristic of discrete breeding stocks.
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TLDR
Comparative analyses of the roar vocalization of male harbor seals from ten sites throughout their distribution showed that vocal variation occurs at the oceanic, regional, population, and subpopulation level, and these factors suggest that site-specific variation influences the development of vocal structure in harbor seals.
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TLDR
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Individual capacity for vocal production appears to develop gradually, showing plasticity in form development over time in captive bearded seals.
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Weddell seal vocalizations from Davis Station showed similarities to those from McMurdo Sound and Palmer Peninsula, but none were identical. One vocalization, DD1, was unique to Davis Station. At all
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TLDR
Geographically different vocal repertoires have potential for identifying discrete breeding stocks of Antarctic seals and include strong fidelity to breeding sites, a polygynous mating system, and learning.
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