@article {57636,
	title = {Listening for males and bats: spectral processing in the hearing organ of Neoconocephalus bivocatus (Orthoptera: Tettigoniidae)},
	year = {2007},
	abstract = {<p>Tettigoniids use hearing for mate finding and the avoidance of predators (mainly bats). Using intracellular recordings, we studied the response properties of auditory receptor cells of Neoconocephalus bivocatus to different sound frequencies, with a special focus on the frequency ranges representative of male calls and bat cries. We found several response properties that may represent adaptations for hearing in both contexts. Receptor cells with characteristic frequencies close to the dominant frequency of the communication signal were more broadly tuned, thus extending their range of high sensitivity. This increases the number of cells responding to the dominant frequency of the male call at low signal amplitudes, which should improve long distance call localization. Many cells tuned to audio frequencies had intermediate thresholds for ultrasound. As a consequence, a large number of receptors should be recruited at intermediate amplitudes of bat cries. This collective response of many receptors may function to emphasize predator information in the sensory system, and correlates with the amplitude range at which ultrasound elicits evasive behavior in tettigoniids. We compare our results with spectral processing in crickets, and discuss that both groups evolved different adaptations for the perceptual tasks of mate and predator detection.</p>
},
	keywords = {acoustic communication, hearing, Predator evasion, Receptor tuning, ultrasound},
	doi = {10.1007/s00359-007-0245-7},
	url = {http://link.springer.com/10.1007/s00359-007-0245-7},
	author = {H{\"o}bel, Gerlinde and Schul, Johannes}
}
@article {57388,
	title = {Opportunity for female choice in the wild is frequently curtailed by low male trait variation in Hyla versicolor},
	year = {2019},
	abstract = {<p>To understand the efficacy of female choice in driving the evolution of male displays, we need to not only characterize preferences but examine the opportunity for the expression of such preferences. Mate assessment by females should be constrained if the relative attractiveness of multiple displays is perceived as equal because trait differences between them are indistinguishable. This is expected to result in apparently arbitrary mate choice, and knowledge about the frequency of such mating patterns is crucial in predicting the strength of sexual selection. Here, we examine discrimination abilities of female Hyla versicolor in the context of actual male-male chorus variation. We found that roughly half of mating encounters in the wild do not provide the call variation required for the expression of female preferences (non-arbitrary choice). Interestingly, the trait for which female H. versicolor shows the strongest preference during playback trials (call duration) is not the trait whose difference will most often be detectable to females in the wild (call rate). Furthermore, we document individual variation in discrimination ability, with some females being able to discriminate multiple traits, while others only focus on one trait. This suggests that the relatively high estimate of arbitrary mating is not only due to females struggling to discriminate natural local variation overall but due to an abundance of individuals with limited discrimination abilities that require encounters with males that differ in the specific trait they will discriminate. Lastly, small trait differences between males do not arise from nearest neighbors plastically altering their calls to be more similar. These findings provide insights on the frequently observed mismatch between laboratory phonotaxis and actual mating success in the wild.</p>
},
	keywords = {acoustic communication, Female choice, mate preference, Random mating, sexual selection},
	doi = {10.1007/s00265-019-2666-z},
	url = {http://link.springer.com/10.1007/s00265-019-2666-z},
	author = {Stratman, Kane D. and H{\"o}bel, Gerlinde}
}
