Advertisement Calls of Two Taiwan Microhylid Frogs, Microhyia heymonsi and M. ornata : Taxonomy

概要

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The advertisement calls of two Taiwan microhylid frogs, Microhyla heymonsi and M. ornata, were analyzed with sound spectrograph to clarify acoustic characteristics and a possible cause of acoustic divergence. The calls of the two species were composed of a series of pulse groups (notes). Several notes constituted distinct note groups in M. heymonsi, while no such note groups were involved in M. ornata. In M. heymonsi the note lasted longer, pulses in a note were fewer, and pulses were repeated more slowly than in M. ornata, but the energy distribution and wave form were quite similar in both species. These indicate that the calls of the two sympatric species have diverged essentially in temporal features, not in frequency features. Between populations of M. ornata from Taiwan and those of the Ryukyu Islands, considerable differences were found in temperature relationships of temporal acoustic features.
社団法人日本動物学会の論文
1987-06-15