Melanophryniscus cambaraensis

Caorsi, Valentina, Bordignon, Debora Wolff, Márquez, Rafael & Martins, Márcio Borges-, 2020, Advertisement call of two threatened red-bellied-toads Melanophryniscus cambaraensis and M. macrogranulosus (Anura: Bufonidae), from the Atlantic Rainforest, southern Brazil, Zootaxa 4894 (2), pp. 206-220 : 210

Melanophryniscus cambaraensis

We collected acoustic data of male calls in three different sample sites in Rio Grande do Sul, Brazil ( Figure 1 ). We recorded Melanophryniscus cambaraensis during day and night on September 18 and 19 of 2012 in Floresta Nacional de São Francisco de Paula – FLONA SFP – a conservation unit (29°25’41.3”S, 50°23’44.5”W / 866 m asl) located in the municipality of São Francisco de Paula .

The advertisement call of Melanophryniscus cambaraensis from FLONA SFP has an average duration of 18.8 seconds (SD = 6.51) and it is composed of segments A and B ( Figure 3 A–B). Part A is composed of 3–11 single modulated notes, each one composed of one pulse (of 0.02 seconds each), separated by long time intervals of 0.38 seconds (SD = 0.052). Call part B is an extremely long train of unmodulated pulses emitted at a rate of 35.8 pulses per second (SD = 3.1), with short time intervals (Mean = 0.02; SD = 0.002), and lasting from 9–32.2 seconds (Mean = 16.6; SD = 6.8) ( Table 1 ). Peak frequency of both parts is quite similar being on average 2.2 kHz in part A (SD = 0.16) and 2.2 kHz in part B (SD = 0.17) ( Table 1 ).

Figures

FIGURE 1. Data collection of Melanophryniscus cambaraensis, in FLONA SFP (1) and M. macrogranulosus, in Garapiá (2) and Morro da Gruta (3) in Rio Grande do Sul, south Brazil.

FIGURE 3. Oscillogram and spectrogram of Melanophryniscus cambaraensis call from FLONA SFP (A - FZ 9093) and a close view of the call (B); and a close view of the call of M. macrogranulosus from Garapiá (C – FZ9102) and from Morro da Gruta (D – FZ 9113). In each figure we show call part A (single pulses) and B (pulsed trill) of the call.