DEPARTMENT OF BEHAVIOURAL ECOLOGY

Evolution in Africa everyday

Project No. 2013/09/N/NZ8/03214 ACRONYM FORMANTS

THE ROLE OF FORMANT FREQUENCIES IN ACOUSTIC SIGNALLING OF BODY SIZE OF THE SENDER IN SELECTED SPECIES FROM GRUIFORMES ORDER

Project duration: 2014-2017

Head of the project: dr MichaƂ Budka

Supervisor: prof. dr hab. Tomasz Osiejuk

Project description
The main aim of this project is to experimentally examine, if birds, similar like a lot of mammals species, use formant frequencies and/or formant dispersion to coding acoustical information about body size of the sender. The aim of the study will be tested on the basis of two species from Gruiformes order: Corncrake and Common Crane. Both species use acoustic signals in large-range communication, and inhabit dense habitats, which cause difficult visual contact between individuals. Simultaneously, the differences in anatomy of vocal tract are observed between these species. In Common Crane elongation of trachea is observed while in Corncrake such anatomical adaptation does not occur. It may suggest that evolution of acoustic communication follows by different ways in these species.
I expect that this project will provide important information about a function of formant frequencies and formant dispersion in acoustic communication in birds.