Interspecific differences of stridulatory signals in three species of bark beetles from the genus Er. (Coleoptera: Curculionidae, Scolytinae) inhabiting the island of Sakhalin.

Stridulatory signals are involved in conspecific interactions between bark beetles (Coleoptera: Curculionidae, Scolytinae). In this study, we compared the qualitative profiles of acoustic signals in three species from the genus Er. Sympatry can be periodically observed in two of them -. and . . Sporadically they occur on the same plants. . colonize distinctly different host plant species; however, on the island of Sakhalin it inhabits the same biotopes. The purpose of the study is to identify species-specific parameters and the extent of differences in stridulatory signals of these species. Airborne signals produced during the contact of males of the same species were experimentally recorded. Among tested parameters of stridulatory signals, as the most species-specific were noted: chirp duration, number of tooth-strikes per chirp, and intertooth-strike interval.