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Heightened responsiveness to female-initiated displays in an Australian cockatoo, the Galah (Eolophus roseicapillus)

Heightened responsiveness to female-initiated displays in an Australian cockatoo, the Galah... Heightened responsiveness to female-initiated displays in an Australian cockatoo, the Galah ( Eolophus roseicapillus ) Judith C. Scarl 1,2,3) ( 1 Department of Neurobiology and Behavior, Cornell University, Ithaca, NY, USA; 2 Cornell Laboratory of Ornithology, Ithaca, NY, USA) (Accepted: 17 February 2009) Summary Many hypotheses have been proposed to explain why in some species, males and females coordinate their behaviour to defend a territory. The sex of the individual initiating a joint display may shed light on the function of the display, but this variable has not been systemati- cally explored. This study investigates whether male–female pairs in a socially monogamous cockatoo, the galah, respond differently to male-initiated and female-initiated joint threat signals, and whether one sex is more likely to initiate a threat response. Solo male defense calls, solo female calls, male-initiated paired calls, and female-initiated paired calls were pre- sented to pairs of galahs at nest cavities during the pre-breeding season. Birds responded most strongly to female-initiated call bouts, regardless of the number of stimulus birds giving vocalizations. While paired birds coordinated their approach responses to the stimuli, males tended to initiate these responses. These results suggest that the sex of the initiating bird, rather http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Behaviour Brill

Heightened responsiveness to female-initiated displays in an Australian cockatoo, the Galah (Eolophus roseicapillus)

Scarl, Judith
Behaviour , Volume 146 (10): 1313 – Jan 1, 2009
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Publisher
Brill
Copyright
© 2009 Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0005-7959
eISSN
1568-539X
DOI
10.1163/156853909X427696
Publisher site
See Article on Publisher Site

Abstract

Heightened responsiveness to female-initiated displays in an Australian cockatoo, the Galah ( Eolophus roseicapillus ) Judith C. Scarl 1,2,3) ( 1 Department of Neurobiology and Behavior, Cornell University, Ithaca, NY, USA; 2 Cornell Laboratory of Ornithology, Ithaca, NY, USA) (Accepted: 17 February 2009) Summary Many hypotheses have been proposed to explain why in some species, males and females coordinate their behaviour to defend a territory. The sex of the individual initiating a joint display may shed light on the function of the display, but this variable has not been systemati- cally explored. This study investigates whether male–female pairs in a socially monogamous cockatoo, the galah, respond differently to male-initiated and female-initiated joint threat signals, and whether one sex is more likely to initiate a threat response. Solo male defense calls, solo female calls, male-initiated paired calls, and female-initiated paired calls were pre- sented to pairs of galahs at nest cavities during the pre-breeding season. Birds responded most strongly to female-initiated call bouts, regardless of the number of stimulus birds giving vocalizations. While paired birds coordinated their approach responses to the stimuli, males tended to initiate these responses. These results suggest that the sex of the initiating bird, rather

Journal

Behaviour – Brill

Published: Jan 1, 2009

Keywords: GALAH; JOINT DEFENSE; JOINT DISPLAY; PARROT; DUET; TERRITORIAL AGGRESSION

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