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![loading](/sites/all/modules/hf_eds/images/loading.gif)
Vocal signature in capybara, Hydrochoerus hydrochaeris.
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![loading](/sites/all/modules/hf_eds/images/loading.gif)
- Author(s): Lacerda, Patrícia; Tokumaru, Rosana; Nogueira, Selene
- Source:
Acta Ethologica. Jun2014, Vol. 17 Issue 2, p77-81. 5p. - Source:
- Additional Information
- Subject Terms:
- Abstract: Social groups of capybaras are stable and cohesive. The species' vocal communication is complex and mediates social interaction. The click call is emitted in a variety of contexts by animals from all age groups, but differs among groups; its attributed function is to keep contact among animals. To evaluate the presence of individual characteristics in the click call of capybaras, we recorded the vocalizations emitted spontaneously by six adults kept either solitary or in groups. We selected and measured the acoustic parameters of 300 click call phrases, 50 per individual. The parameters were submitted to a discriminant function analysis that revealed a classification accuracy of 76.8 %. A General Linear Model analysis revealed significant differences among the six individuals, and post hoc results showed that differences between a given pair were different from those of any other pair. The acoustic parameters that most contributed to discriminate the individual calls were click interval duration and click duration, suggesting that temporal parameters are more important than frequency parameters for individuals' discrimination. The findings of individual characteristics in the click calls indicate that these vocalizations can be used as vocal signatures during social interactions. [ABSTRACT FROM AUTHOR]
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