How to translate text using browser tools
1 September 2006 Calling Songs, Duets, and Auditory Tuning in Two Cryptic Katydids (Tettigoniidae: Phaneropterinae: Amblycorypha)
T. G. Forrest, Dawn R. Lajoie, Dawn Cusick
Author Affiliations +

In most katydids, females listen to and locate a stationary, singing male for mating. Pair formation differs in phaneropterine katydids where pairs form duets and the male typically finds the female after hearing her acoustic reply to his song. We recorded the duetting behavior of two cryptic species of phaneropterines, Amblycorypha rotundifolia (Scudder) and Amblycorypha alexanderi Walker (Tettigoniidae: Phaneropterinae), from populations in their zone of sympatry. The songs of the two species differed in their temporal properties, and the duets differed in the timing of the female’s replies with respect to the male’s song. We also measured the hearing sensitivity and auditory tuning in these species by recording extracellular neural responses to sound stimuli varying in frequency and intensity. Individuals of both species were most sensitive to frequencies near 13 kHz, which corresponds to the frequencies of the males’ calling songs and to the peak frequency in the females’ tick responses. Both species also responded to pulses with ultrasonic carrier frequencies. For higher amplitude stimuli, neural responses had shorter latencies and more action potentials. Latency functions differed for low-frequency and high-frequency stimuli. These data form the basis for understanding how auditory processing and sexual selection might be involved in the recent divergence of these two cryptic species.

T. G. Forrest, Dawn R. Lajoie, and Dawn Cusick "Calling Songs, Duets, and Auditory Tuning in Two Cryptic Katydids (Tettigoniidae: Phaneropterinae: Amblycorypha)," Annals of the Entomological Society of America 99(5), 978-987, (1 September 2006).[978:CSDAAT]2.0.CO;2
Received: 11 January 2006; Accepted: 1 April 2006; Published: 1 September 2006

This article is only available to subscribers.
It is not available for individual sale.

acoustic behavior
Get copyright permission
Back to Top