Results

Recordings of 38 males of Phyllodytes luteolus were obtained, 18 in road environments (9 individuals in situation with chorus; and 9 individuals in situation without chorus) and 20 in natural environments (6 individuals in situation with chorus and 14 individuals in situation without chorus). The advertisement call structure is represented in Figure 3. The mean values and standard deviation of each acoustic parameter of the advertisement call of P. luteolus between each environment and situation are represented in Table 1. The environmental noise differed significantly between the two environments (t = -9.45, df = 37, p < 0.05). Higher noise levels were found in sites close to highways (average = 56.2 dB) compared to natural areas (45.6 dB) (Figure 4). Peak and bandwidth 90% frequencies of recordings from highway environments averaged 129.199 Hz (86.133–947.461 Hz) and 1143.281 Hz (258.398–4048.242 Hz).