USE OF STEREO DUET PLAYBACK TO INVESTIGATE TRADITIONAL DUET PLAYBACK METHODS AND MECHANISMS OF COOPERATIVE TERRITORIAL DEFENCE IN MAGPIE-LARKS by AMY C. ROGERS 1) , JASMINE E. FERGUSON , HELÈNA M. HARRINGTON , SARAH McDOWELL , AUDREY MILLER and JOANNE PANAGOS 2) (Department of Zoology, University of Melbourne) (Acc. 30-IV-2004) Summary Duets are precisely coordinated acoustic displays, usually involving members of a mated pair. Studies investigating avian duet function often employ a single speaker playback system to compare response of focal pairs to simulated territorial intrusion by duetting and solo birds. It has recently been suggested that a ‘stereo duet playback’, in which male and female duet components are separated and broadcast through two different speakers, would provide a more realistic duet stimulus. We conduct the first comparison of a traditional single speaker versus a new stereo duet playback design and provide evidence that Australian magpie-larks, Grallina cyanoleuca , make significantly more flights towards duet playback presented in a more realistic stereo context. Male and female magpie-lark pairs did not split up and attack one ‘intruder’ each when presented with a stereo duet playback. Instead they moved towards the same speaker together as a united pair, showing a
Behaviour – Brill
Published: Jan 1, 2004
Keywords: GRALLINA CYANOLEUCA; COMMUNICATION; STEREO DUET PLAYBACK; MAGPIE-LARK; DUETTING
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