Andrew C Mason

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Assessment strategies are an important component in game theoretical models of contests. Strategies can be either based on one's own abilities (self assessment) or on the relative abilities of two opponents (mutual assessment). Using statistical methodology that allows discrimination between assessment types, we examined contests in the jumping spider(More)
Visual displays in jumping spiders have long been known to be among the most elaborate animal communication behaviours. We now show that one species, Habronattus dossenus, also exhibits an unprecedented complexity of signalling behaviour in the vibratory (seismic) modality. We videotaped courtship behaviour and used laser vibrometry to record seismic(More)
The physics of sound propagation imposes fundamental constraints on sound localization: for a given frequency, the smaller the receiver, the smaller the available cues. Thus, the creation of nanoscale acoustic microphones with directional sensitivity is very difficult. The fly Ormia ochracea possesses an unusual 'ear' that largely overcomes these physical(More)
The jumping spider Habronattus dossenus Griswold 1987 (Salticidae) communicates using seismic signals during courtship and can be found on rocks, sand and leaf litter. We examined the filtering properties of, and tested the efficacy of male courtship signals on, these natural substrates. These substrates have drastically different filtering properties at(More)
Animal signals can consist of multiple parts within or across sensory modalities (multi-component signals or multimodal signals). While recent work has focused on multimodal signals, the production, processing and evolution of multi-component signals has received considerably less attention. Here, using synchronous high-speed video and laser vibrometer(More)
Krebs, N. B. Davies, eds.). Oxford: Blackwell 1978; Nature 306, 226 (1983); Howard, R. D.: Evolution 32, 850 (1978) 9. Ryan, M. J. : Science 209, 523 (1980) 10. Lopez, P. T., Narins, P. M.: Anim. Behav. (in press); Sullivan, B. K.: ibid. 31, 1011 (1983) 11. Ryan, M. J. : Evolution 37, 261 (1983) 12. Robertson, J. G. M. : Anita. Behav. 39, 639 (1990) 13.(More)
The environment can impose strong limitations on the efficacy of signal transmission. In particular, for vibratory communication, the signaling environment is often extremely heterogeneous at small scales. Nevertheless, natural selection is expected to select for signals well-suited for effective transmission. Here, we test for substrate-dependent signal(More)
Mating in the scaly cricket Ornebius aperta often includes the transfer of many spermatophores to individual females during extended copulatory interactions. We manipulated male condition in staged matings to determine whether this could explain variation in the number of repeated copulations seen across pairs. Males on a high nutrient diet were in good(More)
This study characterizes aspects of the anatomy and physiology of auditory receptors and certain interneurons in the cricket Gryllus rubens. We identified an 'L'-shaped ascending interneuron tuned to frequencies > 15 kHz (57 dB SPL threshold at 20 kHz). Also identified were two intrasegmental 'omega'-shaped interneurons that were broadly tuned to 3-65 kHz,(More)
The calling song of male crickets, including Oecanthus nigricornis (Walker), attracts females for mating and provides a model system of sexual communication. We give the first conclusive identification of a feature of cricket song that is both attractive to females and indicates a phenotypic feature (body size) that determines male mating success and female(More)