Artiotonus captivus Montealegre-Z., Morris, Sarria-S. & Mason, 2011

Analysis based on nine males recorded. Males of this species produce a continuous clos- ing stroke with periodic pauses, which generates a train of 7–12 sinusoidal ultrasonic pulses, incrementing in peak amplitude, lasting 12.8 ± 1.7 ms (n = 9) (Figs 19b–d, 20c). This pulse infrastructure has an effect on spectral sharpness, gently reducing (in comparison with that of A. artius) its Q value to 39.3 ± 1.6 (n = 9). Sound level was 90.56 ± 1.42 dB (SPL meter operating in fast impulse mode) as recorded at 9 cm with the microphone directed at the dorsal field of the tegmina (n = 9). The spectrum peaks at a single frequency 43.1 ± 1.6 kHz (23.5 ◦C, n = 9, range 41.2–44.7.0 kHz; Fig. 19e). No harmonics are seen within 30 dB of the carrier peak. At 23.5 ◦C, calls are given at a rate of 14.44 ± 2.13 calls/min (= 0.24 calls/s). Within intervals of one minute, call timings were more or less random for all animals recorded, i.e. no particular call organization was observed (Fig. 19a).

Males interact acoustically with alternating calls, and the song of one male evokes an acoustic response from other males. Females are easily attracted to calling males and obtaining offspring is relatively easy. In the laboratory, we randomly observed for nearly 2 months (monitoring with a camcorder overnight) five females all responding to the call of seven different conspecific males. Four of these females were promiscuous and copulated with various males on different days. [1]

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