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Male competition and aggregative behaviour are mediated by acoustic cues within a temporally unstructured aggregation

Male competition and aggregative behaviour are mediated by acoustic cues within a temporally... Male competition and aggregative behaviour are mediated by acoustic cues within a temporally unstructured aggregation Patrick A. Guerra 1) & Andrew C. Mason 2) (Integrative Behaviour & Neuroscience Group, Department of Life Sciences, University of Toronto at Scarborough) (Accepted: 21 January 2005) Summary We investigated the dynamics of temporally unstructured acoustic signalling aggregations, where direct interactions among males appear to be absent. The short-winged meadow katy- did, Conocephalus brevipennis Scudder (Orthoptera: Tettigoniidae), is a species whose males form dense, aphasic singing aggregations. By studying both phonotactic responses and male calling behaviour towards conspecific, heterospecific, and aggregate signals (combined songs of many individuals), we examined how males might respond to acoustic signals within such aggregations, and whether such apparently unstructured groups do in fact possess spatial or temporal structure. Phonotactic bioassays demonstrate that males and females are attracted to conspecific and aggregate, but not heterospecific song. When given a choice between individ- ual conspecific and aggregate song, females prefer conspecific song, whereas males preferred aggregate song, but only if it was presented at a lower relative intensity than the individual song. Response to aggregate song also depended on male size — the largest males approached the broadcast speaker more closely http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Behaviour Brill

Male competition and aggregative behaviour are mediated by acoustic cues within a temporally unstructured aggregation

Behaviour , Volume 142 (1): 20 – Jan 1, 2005

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References (32)

Publisher
Brill
Copyright
Copyright © Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0005-7959
eISSN
1568-539X
DOI
10.1163/1568539053627730
Publisher site
See Article on Publisher Site

Abstract

Male competition and aggregative behaviour are mediated by acoustic cues within a temporally unstructured aggregation Patrick A. Guerra 1) & Andrew C. Mason 2) (Integrative Behaviour & Neuroscience Group, Department of Life Sciences, University of Toronto at Scarborough) (Accepted: 21 January 2005) Summary We investigated the dynamics of temporally unstructured acoustic signalling aggregations, where direct interactions among males appear to be absent. The short-winged meadow katy- did, Conocephalus brevipennis Scudder (Orthoptera: Tettigoniidae), is a species whose males form dense, aphasic singing aggregations. By studying both phonotactic responses and male calling behaviour towards conspecific, heterospecific, and aggregate signals (combined songs of many individuals), we examined how males might respond to acoustic signals within such aggregations, and whether such apparently unstructured groups do in fact possess spatial or temporal structure. Phonotactic bioassays demonstrate that males and females are attracted to conspecific and aggregate, but not heterospecific song. When given a choice between individ- ual conspecific and aggregate song, females prefer conspecific song, whereas males preferred aggregate song, but only if it was presented at a lower relative intensity than the individual song. Response to aggregate song also depended on male size — the largest males approached the broadcast speaker more closely

Journal

BehaviourBrill

Published: Jan 1, 2005

Keywords: ORTHOPTERA; TETTIGONIIDAE; CHORUS; COMPETITIVE SIGNALLING; AGGREGATION; PHONOTAXIS

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