Abstract
Substrate-borne vibrational signals used in communication of Tetrix ceperoi (Orthoptera: Tetrigidae) are described for the first time. Among all studied Tetrix species, T. ceperoi use the richest repertoire of vibrational signals. These signals consist of isolated pulses or pulses united into rhythmically repeated or irregularly repeated groups and are used in rivalry, pre-copulation, and copulation behaviour (1st, 3rd, and 4th structural types of signals), and are also used by single males or females (2nd type of signal). A 5th type of vibrational signal is produced by wing tremulation, which was unknown Tetrigidae. Based on the results of this study, the vibrational signalisation seems to play an important role in species-specific mate recognition of T. ceperoi. The significance of individual signals is discussed based on results of manipulative contact experiments.
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