Animal Biology , Vol. 54, No. 2, pp. 207-220 (2004) Koninklijke Brill NV, Leiden, 2004. Also available online - www.brill.nl Amplitude spectra of Corncrake calls: what do they signalise? TOMASZ S. OSIEJUK 1 , ∗ , BOGUMIŁA OLECH 2 1 Department of Animal Morphology, Institute of Environmental Biology, Adam Mickiewicz University, 28 Czerwca 1956/198, 61-485 Pozna ´ n, Poland 2 Kampinoski National Park, Tetmajera 38, 05-080 Izabelin, Poland Abstract —The territorial call of corncrake Crex crex males is a disyllabic, loud, pulse repetition signal repeated in long series at night. It seems to be relatively simple as it lacks the repertoire variation typical of passerines, but still seems to be the equivalent of a territorial and/or advertisement song. In this paper we tested: (1) whether the pattern of energy distribution within the call (i.e. amplitude spectrum) is individually invariant; (2) whether it could be a signal used in an individual recognition system; and (3) whether it is a sexually selected honest trait related to male body size. We found that amplitude spectra varied more between than within males, but it is rather unlikely that energy distribution is a single feature encoding identity of a male. We found
Animal Biology – Brill
Published: Jan 1, 2004
Keywords: BODY SIZE; RECOGNITION; CREX CREX; CORNCRAKE; INDIVIDUAL; AMPLITUDE SPECTRUM; ENERGY DISTRIBUTION
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