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Interference of Overlapping Insect Vibratory Communication Signals: An Eushistus heros Model.

Čokl A, Laumann RA, Žunič Kosi A, Blassioli-Moraes MC, Virant-Doberlet M, Borges M - PLoS ONE (2015)

Bottom Line: The calling female pulse overlaps the male vibratory response when the latency of the latter is shorter than the duration of the female triggering signal or when the male response does not inhibit the following female pulse.Interference does not occur in overlapped narrow band female calling pulses and broadband male courtship pulse trains.In a duet with overlapped signals females and males change time parameters and increase the frequency difference between signals by changing the frequency level and frequency modulation pattern of their calls.

View Article: PubMed Central - PubMed

Affiliation: Department of Entomology, National Institute of Biology, Ljubljana, Slovenia.

ABSTRACT
Plants limit the range of insect substrate-borne vibratory communication by their architecture and mechanical properties that change transmitted signal time, amplitude and frequency characteristics. Stinkbugs gain higher signal-to-noise ratio and increase communication distance by emitting narrowband low frequency vibratory signals that are tuned with transmission properties of plants. The objective of the present study was to investigate hitherto overlooked consequences of duetting with mutually overlapped narrowband vibratory signals. The overlapped vibrations of the model stinkbug species Eushistus heros, produced naturally or induced artificially on different plants, have been analysed. They represent female and male strategies to preserve information within a complex masked signal. The brown stinkbugs E. heros communicate with species and gender specific vibratory signals that constitute characteristic duets in the calling, courtship and rivalry phases of mating behaviour. The calling female pulse overlaps the male vibratory response when the latency of the latter is shorter than the duration of the female triggering signal or when the male response does not inhibit the following female pulse. Overlapping of signals induces interference that changes their amplitude pattern to a sequence of regularly repeated pulses in which their duration and the difference between frequencies of overlapped vibrations are related inversely. Interference does not occur in overlapped narrow band female calling pulses and broadband male courtship pulse trains. In a duet with overlapped signals females and males change time parameters and increase the frequency difference between signals by changing the frequency level and frequency modulation pattern of their calls.

No MeSH data available.


Related in: MedlinePlus

Spectra (upper), sonograms (middle) and oscillograms (lower) of Eushistus heros vibratory communication signals.a: FS-1 and MS-1 pulses in a calling duet, b: FS-1 pulses and MS-2 pulse trains in a courtship duet, c: MRS pulse train.
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pone.0130775.g001: Spectra (upper), sonograms (middle) and oscillograms (lower) of Eushistus heros vibratory communication signals.a: FS-1 and MS-1 pulses in a calling duet, b: FS-1 pulses and MS-2 pulse trains in a courtship duet, c: MRS pulse train.

Mentions: The mating behaviour of E. heros stinkbugs on a plant is accompanied by communication with one female (FS-1) and three different male songs (MS-1, MS-2, MRS) produced by abdomen tremulation (Fig 1). The classification of songs recorded from the plant differs from those described from mates communicating on a loudspeaker (16): MS-2 corresponds to the song determined previously as MS-3 (16); loudspeaker recorded signals classified as FS-2 and MS-2 song were not identified on a plant as special songs. Time and frequency characteristics of plant recorded songs are shown in the Table 1 and in S1 Table.


Interference of Overlapping Insect Vibratory Communication Signals: An Eushistus heros Model.

Čokl A, Laumann RA, Žunič Kosi A, Blassioli-Moraes MC, Virant-Doberlet M, Borges M - PLoS ONE (2015)

Spectra (upper), sonograms (middle) and oscillograms (lower) of Eushistus heros vibratory communication signals.a: FS-1 and MS-1 pulses in a calling duet, b: FS-1 pulses and MS-2 pulse trains in a courtship duet, c: MRS pulse train.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4476573&req=5

pone.0130775.g001: Spectra (upper), sonograms (middle) and oscillograms (lower) of Eushistus heros vibratory communication signals.a: FS-1 and MS-1 pulses in a calling duet, b: FS-1 pulses and MS-2 pulse trains in a courtship duet, c: MRS pulse train.
Mentions: The mating behaviour of E. heros stinkbugs on a plant is accompanied by communication with one female (FS-1) and three different male songs (MS-1, MS-2, MRS) produced by abdomen tremulation (Fig 1). The classification of songs recorded from the plant differs from those described from mates communicating on a loudspeaker (16): MS-2 corresponds to the song determined previously as MS-3 (16); loudspeaker recorded signals classified as FS-2 and MS-2 song were not identified on a plant as special songs. Time and frequency characteristics of plant recorded songs are shown in the Table 1 and in S1 Table.

Bottom Line: The calling female pulse overlaps the male vibratory response when the latency of the latter is shorter than the duration of the female triggering signal or when the male response does not inhibit the following female pulse.Interference does not occur in overlapped narrow band female calling pulses and broadband male courtship pulse trains.In a duet with overlapped signals females and males change time parameters and increase the frequency difference between signals by changing the frequency level and frequency modulation pattern of their calls.

View Article: PubMed Central - PubMed

Affiliation: Department of Entomology, National Institute of Biology, Ljubljana, Slovenia.

ABSTRACT
Plants limit the range of insect substrate-borne vibratory communication by their architecture and mechanical properties that change transmitted signal time, amplitude and frequency characteristics. Stinkbugs gain higher signal-to-noise ratio and increase communication distance by emitting narrowband low frequency vibratory signals that are tuned with transmission properties of plants. The objective of the present study was to investigate hitherto overlooked consequences of duetting with mutually overlapped narrowband vibratory signals. The overlapped vibrations of the model stinkbug species Eushistus heros, produced naturally or induced artificially on different plants, have been analysed. They represent female and male strategies to preserve information within a complex masked signal. The brown stinkbugs E. heros communicate with species and gender specific vibratory signals that constitute characteristic duets in the calling, courtship and rivalry phases of mating behaviour. The calling female pulse overlaps the male vibratory response when the latency of the latter is shorter than the duration of the female triggering signal or when the male response does not inhibit the following female pulse. Overlapping of signals induces interference that changes their amplitude pattern to a sequence of regularly repeated pulses in which their duration and the difference between frequencies of overlapped vibrations are related inversely. Interference does not occur in overlapped narrow band female calling pulses and broadband male courtship pulse trains. In a duet with overlapped signals females and males change time parameters and increase the frequency difference between signals by changing the frequency level and frequency modulation pattern of their calls.

No MeSH data available.


Related in: MedlinePlus