Lautinventare der Säugetiere — diskret oder kontinuierlich?


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The question whether vocal inventories have a discrete or continuous character is discussed by means of the wild boar vocalizations. The nonreproducibility of the calls, the characteristics of receivers, the redundancy in the calls, the behavioural context, other information channels, the synchronization of vocalization and motion, the morphological long-time variation of the individuals, the influence of excitement on the utterances argue against fixed patterns in the vocalization. On the other hand, individual recognition and calls with a specific function and structure (warning calls, sexual calls etc.) argue in favour of the existence of acoustic invariants and hence a roughly discrete character of the calls.