Brasília, Brazil
Brasília, Brazil

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Blassioli-Moraes M.C.,Semiochemicals Laboratory | Magalhaes D.M.,Semiochemicals Laboratory | Magalhaes D.M.,University of Brasilia | Cokl A.,Slovenian National Institute of Biology | And 4 more authors.
Physiological Entomology | Year: 2014

Vibrational communication is important for successful mating in various stink bugs species. The vibrational signals from males and females of Dichelops melacanthus Dallas (Hemiptera: Pentatomidae) are recorded from a nonresonant substrate (i.e. a loudspeaker membrane) to characterize the temporal and spectral properties of these vibrational signals, as well as on a resonant substrate (i.e. bean plants) to obtain information about how these signals are altered when they are transmitted through the plants. On the loudspeaker membrane, D. melacanthus males and females emit only one male or one female song, respectively. However, when the insects are placed on bean leaves, a more complex repertoire is recorded, with three different songs for each sex. The first female and male songs appear to have calling functions and the third male and female songs are emitted during courtship. The second female and male songs are emitted after the first song, although their functions in mating behaviour are not clear. The identified repertoire is similar to those of other Neotropical stink bugs, starting with songs 1 and 2 and developing into song 3. Frequency modulation is observed in the female songs recorded from the loudspeaker membrane and the plants. The signals recorded from plants present higher harmonic peaks compared with the signals recorded from the loudspeaker membrane. The presence of species and sex-specific songs during mating confirms the important role of vibrational communication in mate location and recognition. The temporal and spectral characteristic signals are influenced by the substrate used to record the songs emitted by D. melacanthus. © 2013 The Royal Entomological Society.

Laumann R.A.,Semiochemicals Laboratory | Kavcic A.,Slovenian National Institute of Biology | Moraes M.C.B.,Semiochemicals Laboratory | Borges M.,Semiochemicals Laboratory | Cokl A.,Slovenian National Institute of Biology
Physiological Entomology | Year: 2013

Vibratory communication during reproductive behaviour is less well described in predatory (Asopinae) than in phytophagous (Pentatominae) stink bugs. Different steps in the mating behaviour of the predatory stink bug Podisus nigrispinus (Dallas) (Hemiptera: Pentatomidae; Asopinae) are described in the present study, together with vibratory signals emitted on artificial and natural substrate during courtship and copulation. Vibratory signals in Podisus nigrispinus have a decisive role in copulation success and are produced in both sexes by abdominal vibration and tremulation. In P. nigrispinus, one species-specific female and two male songs, which do not show the calling function typically found in phytophagous stink bugs, are produced by abdominal vibration and are emitted during reproductive behaviour. Additionally, P. nigrispinus produces tremulatory signals that have no species or sex specificity. Tremulatory signals emitted spontaneously on a plant as a sequence of readily repeated pulses are similar to the calling songs of the Pentatominae stink bug. These signals may carry information on the presence of a mate; however, in other behavioural contexts, they may have a different function, such as advertisement or even alarm signals. Plants transmit vibratory signals produced by both mechanisms as a low-pass filter, increasing the amount of low-frequency components. The results of the present study raise important questions about the interaction between chemical and vibratory signals in the mating behaviour of predatory stink bugs. © 2013 The Royal Entomological Society.

Laumann R.A.,Semiochemicals Laboratory | Cokl A.,Slovenian National Institute of Biology | Blassioli-Moraes M.C.,Semiochemicals Laboratory | Borges M.,Semiochemicals Laboratory
Journal of Insect Behavior | Year: 2016

Communication is in phytophagous stink bugs of the subfamily Pentatominae related to mating behavior that among others includes location and recognition of the partner during calling and courting. Differences in temporal and frequency parameters of vibratory signals contributes to species reproductive isolation. Chinavia impicticornis and C. ubica are two green Neotropical stink bugs that live and mate on the same host plants. We tested the hypothesis that differences in temporal and spectral characteristics of both species vibratory signals enable their recognition to that extent that it interrupts further interspecific communication and copulation. To confirm or reject this hypothesis we monitored both species mating behaviour and recorded their vibratory songs on the non-resonant loudspeaker membranes and on the plant. The level of interspecific vibratory communication was tested also by playback experiments. Reproductive behavior and vibratory communication show similar patterns in both Chinavia species. Differences observed in temporal and spectral characteristics of female and male signals enable species discrimination by PCA analyses. Insects that respond to heterospecific vibratory signals do not step forward to behaviors leading to copulation. Results suggest that species isolation takes place in both investigated Chinavia species at an early stage of mating behavior reducing reproductive interference and the probability of heterospecific mating. © 2016 Springer Science+Business Media New York

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