Limits...
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

Sonagrams and oscillograms of overlapped FS-1 and MS-1 pulses of Eushistus heros that show a relation between interference pulse duration and frequency difference between masked signals.a, b: overlapped FS-1 and MS-1 pulses. c: overlapped FS-1 and MS-1 signals shown with different time axes. d: mean duration of pulses recorded in naturally emitted FS-1/MS-1 overlapped regions. Means were calculated for 10 different males with 2–7 MS-1 signals analyzed in each. Single mean duration values were calculated in 3 to 34 pulses within each signal. SD values were below 40% of the mean value. Regression (type power) equation: y = 814.16x-0.911, R2 = 0.8521.
© Copyright Policy
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4476573&req=5

pone.0130775.g002: Sonagrams and oscillograms of overlapped FS-1 and MS-1 pulses of Eushistus heros that show a relation between interference pulse duration and frequency difference between masked signals.a, b: overlapped FS-1 and MS-1 pulses. c: overlapped FS-1 and MS-1 signals shown with different time axes. d: mean duration of pulses recorded in naturally emitted FS-1/MS-1 overlapped regions. Means were calculated for 10 different males with 2–7 MS-1 signals analyzed in each. Single mean duration values were calculated in 3 to 34 pulses within each signal. SD values were below 40% of the mean value. Regression (type power) equation: y = 814.16x-0.911, R2 = 0.8521.

Mentions: Overlapping of calling signals was recorded when FS-1 pulses were longer than MS-1 response latency (Fig 2a) and/or when MS-1 pulses of longer duration than the FS-1 pulse repetition time did not inhibit the following FS-1 signal emission (Fig 2b). Overlapped FS-1/MS-1 vibrations induced interference characterized by regularly repeated fused pulses (Fig 2c) whose duration increased with decreased difference between frequencies of MS-1 and FS-1 vibrations (Fig 2d). Interference does not occur in the alternation of overlapped narrow-band frequency modulated FS-1 pulses with broad-band MS-2 pulse trains that takes place in courtship.


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)

Sonagrams and oscillograms of overlapped FS-1 and MS-1 pulses of Eushistus heros that show a relation between interference pulse duration and frequency difference between masked signals.a, b: overlapped FS-1 and MS-1 pulses. c: overlapped FS-1 and MS-1 signals shown with different time axes. d: mean duration of pulses recorded in naturally emitted FS-1/MS-1 overlapped regions. Means were calculated for 10 different males with 2–7 MS-1 signals analyzed in each. Single mean duration values were calculated in 3 to 34 pulses within each signal. SD values were below 40% of the mean value. Regression (type power) equation: y = 814.16x-0.911, R2 = 0.8521.
© Copyright Policy
Related In: Results  -  Collection

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

pone.0130775.g002: Sonagrams and oscillograms of overlapped FS-1 and MS-1 pulses of Eushistus heros that show a relation between interference pulse duration and frequency difference between masked signals.a, b: overlapped FS-1 and MS-1 pulses. c: overlapped FS-1 and MS-1 signals shown with different time axes. d: mean duration of pulses recorded in naturally emitted FS-1/MS-1 overlapped regions. Means were calculated for 10 different males with 2–7 MS-1 signals analyzed in each. Single mean duration values were calculated in 3 to 34 pulses within each signal. SD values were below 40% of the mean value. Regression (type power) equation: y = 814.16x-0.911, R2 = 0.8521.
Mentions: Overlapping of calling signals was recorded when FS-1 pulses were longer than MS-1 response latency (Fig 2a) and/or when MS-1 pulses of longer duration than the FS-1 pulse repetition time did not inhibit the following FS-1 signal emission (Fig 2b). Overlapped FS-1/MS-1 vibrations induced interference characterized by regularly repeated fused pulses (Fig 2c) whose duration increased with decreased difference between frequencies of MS-1 and FS-1 vibrations (Fig 2d). Interference does not occur in the alternation of overlapped narrow-band frequency modulated FS-1 pulses with broad-band MS-2 pulse trains that takes place in courtship.

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