Acoustic signals of the bush-crickets Isophya (Orthoptera: Phaneropteridae) from Eastern Europe, Caucasus and adjacent territories

Abstract

ISSN (online): 1802-8829http://www.eje.cz many species diffi cult to identify. The results of recent cytogenetic and molecular genetic studies contradict morphological and bioacoustic data (Warchalowska-Sliwa et al., 2008;Grzywacz-Gibała et al., 2010). We believe that the investigation of the acoustic signals of Isophya males as taxonomic characters could not only be useful for species diagnostics but also provide additional material for a better understanding of the taxonomic position of several species and evolutionary trends in the genus Isophya. Songs of specimens of different species collected in the eastern part of the range of this genus can provide additional data for analysis of the geographical variability in sound signals. Previously data on the songs of several species were published by Zhantiev and co-authors (op. cit.). However, these results do not contain a full description of song structure, frequency spectra and stridulatory fi les. This article fi lls these gaps and provides new data about some rare species. MATERIALS AND METHODSAdults or nymphs of different instars of bush-crickets collected in natural habitats were brought to the laboratory where bioacoustic and most behavioural experiments were performed. Tape recordings of the calling song of I. doneciana were obtained only in the fi eld. We usually used 3-5 specimens for bioacoustic studies, but in the cases of some rare species only one male was available (see note in the text).Laboratory

“Noah’s Ark” Project: Interim Results and Outlook for Classic Collection Development

“…A mechanism for the emission of sound signals has been, for the first time, discovered in representatives of a number of Orthopteran and Homopteran families, suggesting repeated formation of a similar stridulation signal during their evolution [71]. The results of the analysis of vibration and sound signals in the species of a number of Orthoptera and Homoptera families [71][72][73]77] confirm the hypothesis that they serve as an effective reproductive barrier. Cranial differences in isolated populations of Arctic fox Vulpes lagopus on the Commander Islands were shown to result from selection, rather than genetic drift [104].…”

“…The possibility of a reliable identification of the related species and subspecies of a number of Asian Insecta, Amphibia, Reptilia, Aves, and Mammalia by acoustic parameters was demonstrated for the first time [71][72][73][74][75][76]. A method has been developed for determining the genetic identity of jellyfish and polyps in the laboratory lines of some Cercozoa, which makes it possible to adequately assess the diversity of these species [77]. The specific and subspecific levels of taxonomic differentiation of the Asterocheridae and Ascothoracida groups have been marked [43,45]: correct differentiation of these levels is one of the key challenges of microsystematics.…”

“Noah’s Ark” Project: Interim Results and Outlook for Classic Collection Development

“…A mechanism for the emission of sound signals has been, for the first time, discovered in representatives of a number of Orthopteran and Homopteran families, suggesting repeated formation of a similar stridulation signal during their evolution [71]. The results of the analysis of vibration and sound signals in the species of a number of Orthoptera and Homoptera families [71-73, 77] confirm the hypothesis that they serve as an effective reproductive barrier. Cranial differences in isolated populations of Arctic fox Vulpes lagopus on the Commander Islands were shown to result from selection, rather than genetic drift [104].…”

“…The possibility of a reliable identification of the related species and subspecies of a number of Asian Insecta, Amphibia, Reptilia, Aves, and Mammalia by acoustic parameters was demonstrated for the first time [71-76]. A method has been developed for determining the genetic identity of jellyfish and polyps in the laboratory lines of some Cercozoa, which makes it possible to adequately assess the diversity of these species [77]. The specific and subspecific levels of taxonomic differentiation of the Asterocheridae and Ascothoracida groups have been marked [43, 45]: correct differentiation of these levels is one of the key challenges of microsystematics.…”

Acoustic signalling in Orthoptera

“…The songs of orthopterans are usually species specific, each having a particular temporal pattern of syllables which may be overlaid with modulations of frequency and intensity (e.g. Korsunovskaya, 2009;Kowalski and Lakes-Harlan, 2013;Zefa et al, 2013;Zhantiev et al, 2017). However, this pattern can still vary to some extent within species.…”