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Vocalization in Frogs of the Family Sooglossidae

Ronald A. Nussbaum, Alan Jaslow and Jeffrey Watson
Journal of Herpetology
Vol. 16, No. 3 (Sep., 1982), pp. 198-203
DOI: 10.2307/1563713
Stable URL: http://www.jstor.org/stable/1563713
Page Count: 6
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Vocalization in Frogs of the Family Sooglossidae
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Abstract

The advertisement calls of the three species of sooglossid frogs are described. Nesomantis thomasseti, the largest species, has a long call (4.2 sec) usually consisting of four primary and four secondary notes, each with a dominant frequency of about 2500 Hz. The primary and secondary notes are clearly pulsed. Sooglossus sechellensis also has a complex call with a single primary note normally followed by four secondary notes. The call duration averages 0.54 sec, and the dominant frequency of the primary note is about 2660 Hz. Both the primary and secondary notes are pulsed. The call of the smallest species, Sooglossus gardineri, differs markedly from the calls of the other two species in that it is a single note call that is finely tuned, with little amplitude modulation. It is shorter in duration (0.14 sec) and has a higher dominant frequency (5550 Hz). Vocalization, along with data on morphology and karyology, suggests that the present classification of the Sooglossidae does not accurately reflect the relationships of the three species.

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