Abstract
Territorial males of the pan-Amazonian Dart-poison frog, Epipedobates femoralis, are known to present stereotypic phonotactic responses to the playback of conspecific and synthetic calls. Fixed site attachment and a long calling period within an environment of little temperature change render this terrestrial and diurnal pan-Amazonian frog a rewarding species for field bioacoustics. In experiments at the field station Arataï, French Guiana, we tested whether the prominent frequency modulation of the advertisement-call notes is critical for eliciting phonotactic responses. Substitution of the natural upward sweep by either a pure tone within the species frequency range or a reverse sweep did not alter the males’ phonotactic behavior. Playbacks with artificial advertisement calls embedded in high levels of either low-pass or high-pass masking noise designed to saturate nerve fibers from either the amphibian papilla or basilar papilla showed that male phonotactic behavior in this species is subserved by activation of the basilar papilla of the inner ear.
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Abbreviations
- FM :
-
Frequency modulated
- AP :
-
Amphibian papilla
- BP :
-
Basilar papilla
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Acknowledgements
We thank Vanessa Hequet, Muriel Nugent, the Association Arataï and especially Philippe Gaucher for their unfailing and generous assistance with this project. Brigitte Gottsberger, Daniela Grabul, Edith Gruber, and Christian Proy assisted during the field experiments. Norbert Ellinger, Herbert Gasser and Daniela Grabul synthesized the playback signals. The study was supported by grants from the Austrian Science Foundation (FWF Projects P 11565, P 15345) to W.H. and by NIH Grant no. DC00222 and Academic Senate grant 3501 to P.M.N.
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Hödl, W., Amézquita, A. & Narins, P.M. The rôle of call frequency and the auditory papillae in phonotactic behavior in male Dart-poison frogs Epipedobates femoralis (Dendrobatidae). J Comp Physiol A 190, 823–829 (2004). https://doi.org/10.1007/s00359-004-0536-1
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DOI: https://doi.org/10.1007/s00359-004-0536-1