Robert R. Capranica

Three populations of primary auditory fibers in the bullfrog (Rana catesbeiana): Their peripheral origins and frequency sensitivities

SummarySingle unit recordings from the VIIIth nerve of the bullfrog (Rana catesbeiana) in response to tones reveal three populations of auditory fibers: low-frequency inhibitable fibers, mid-frequency non-inhibitable fibers and high-frequency non-inhibitable fibers. By selectively sectioning and recording from individual nerve branchlets within the inner ear, it is shown that the amphibian papilla gives rise to low and mid-frequency sensitive units and the basilar papilla gives rise to high-frequency sensitive units.

Accuracy of phonotaxis by the green treefrog (Hyla cinerea)

Summary1.Phonotactic approaches (N=156) of 42 female green treefrogs (Hyla cinerea) were videotaped over a distance of 3.75 m in response to synthetic mating calls (0.9 kHz and 0.9, 2.7 and 3.0 kHz).2.To quantify the accuracy of phonotaxis, jump anglesγ and head orientation angles α were measured (Fig. 2) when the animals were 1 m or farther from the sound source.3.Phonotaxis was extremely accurate in response to the 3-component call, which is behaviorally equivalent to the males natural mating call. The mean jump angle was

Encoding of Geographic Dialects in the Auditory System of the Cricket Frog

\bar \gamma = 16.1^\circ

Vocal Response of the Bullfrog to Natural and Synthetic Mating Calls

(Fig. 5). Head scanning occurred prior to about 25% of the jumps. The accuracy of head orientation after scanning was even greater

Selectivity of the peripheral auditory system of spadefoot toads (Scaphiopus couchi) for sounds of biological significance

(\bar \alpha = 8.4^\circ )

Sound localization behavior of the green treefrog (Hyla cinerea) and the barking treefrog (H. gratiosa)

as were the subsequent jumps