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Volodin I.A., Volodina E.V., Isaeva I.V., 2001. Vocal repertoire in the Dhole Cuon alpinus in captivity // In: Canid Biology and Conservation, An International Conference, Oxford.
 Three independent structural components form the dhole vocal repertoire: the low tonal, the high tonal, and the pulsed one. On the base of the occurrence of the components the dhole vocal repertoire was represented as consisting of three vocal classes with eleven call types. Two wideband signals with a pronounced pulsed pattern were put together into pulsed vocal class. Two vocal types involving the high component in the band between 6 and 9 kHz, were put into the class with high-frequency component. The rest seven types with expressed low-frequency harmonic component were put into class of tonal signals. The revealed vocal components did differ on their impact into structural diversity of the dhole vocal repertoire: the high variability of the low tonal component results in a structural radiation into a few vocal types, whereas the variabilities of both the high tonal and the pulsed components follow 'one or zero' principle, i.e. a component is presented versus absent. The fact that the different components may be produced simultaneously says in use their production by different vocal sources. On the base of the structural analysis and situative occurrence a scheme of structural transitions between different vocal types in the dhole was constructed.
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