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Effects of heterospecific and conspecific vibrational signal overlap and signal-to-noise ratio on male responsiveness in Nezara viridula (L.)
De Groot, Maarten (Author), Čokl, Andrej (Author), Virant-Doberlet, Meta (Author)

URLURL - Presentation file, Visit http://dx.doi.org/10.1242/jeb.044024 This link opens in a new window

Abstract
Animals often communicate in environments with high levels of biotic noise that arises from the signals of other individuals. Although effects of background biotic noise on mate recognition and discrimination have been widely studied in air-born sound communication, little is known about incidental interference between signallers that use substrate-borne vibrational signals. In this study we investigated the ability of males of the southern green stink bug Nezara viridula (L.) (Heteroptera: Pentatomidae) to recognize conspecific female song in the presence of biotic noise originating from conspecific and heterospecific vibrational signals. We tested male responsiveness on a bean plant in playback experiments. One leaf was vibrated with conspecific female song, while to the other one we simultaneously applied either heterospecific female signal or various altered conspecific signals with different temporal parameters. We tested males in three levels of biotic noise, ranging from +6dB to –6dB and we compared male responsiveness in each treatment with response obtained in unilateral treatment with unaltered conspecific female calling song. Male responsiveness was reduced in the presence of heterospecific signals or when background noise from conspecific signals obscured the species-specific temporal pattern of conspecific female song. By contrast, the presence of two sources of conspecific female songs had a positive effect on male responsiveness, for as long as the signal repetition rate of perceived song did not differ from the species-specific value. In the presence of interfering background signals, searching activity was less affected than male signalling. Increased signal-to-noise ratio restored male responsiveness to the level expressed in unilateral stimulation with conspecific female song. The results are discussed with regard to male behavioural strategies for vibrational communication in a noisy environment.

Language:English
Keywords:vibrational communication, cocktail party problem, mate recognition, nisect
Work type:Not categorized (r6)
Tipology:1.01 - Original Scientific Article
Organization:BF - Biotechnical Faculty
Year:2010
Publisher:Cambridge University Press
Number of pages:str. 3213-3222
Numbering:Vol. 213, 213
UDC:591
ISSN on article:0022-0949
DOI:10.1242/jeb.044024 Link is opened in a new window
COBISS.SI-ID:2256719 Link is opened in a new window
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Downloads:327
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Record is a part of a journal

Title:Journal of Experimental Biology
Shortened title:J. Exp. Biol.
Publisher:Cambridge University Press
ISSN:0022-0949
COBISS.SI-ID:4736266 This link opens in a new window

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