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Table 1.

Latencies (mean ± s.e.m.) of the first negative peak of auditory brainstem response (ABR) waves to the separate pulses within a species-specific sound stimulus

Pulse numberPc (N=7)Pp (N=7)Bm2 (N=6)Bm3 (N=6)Tv (N=7)Lg (N=6)
2.41±0.17 1.81±0.04 4.55±0.02 1.73±0.02 1.36±0.24 1.78±0.32 
2.22±0.15 1.72±0.06 4.73±0.01 2.07±0.03 1.23±0.22 2.68±0.60 
2.34±0.15 1.75±0.05 1.63±0.12 1.23±0.23 
2.17±0.12 1.69±0.06 1.22±0.21 3.28±0.47 
2.12±0.11 1.93±0.05 1.20±0.23 
2.11±0.13 1.83±0.07 1.25±0.21 
2.05±0.12 1.99±0.05 
2.01±0.14 
2.16±0.18 
10 2.13±0.11 
11 2.41±0.14 
Pulse numberPc (N=7)Pp (N=7)Bm2 (N=6)Bm3 (N=6)Tv (N=7)Lg (N=6)
2.41±0.17 1.81±0.04 4.55±0.02 1.73±0.02 1.36±0.24 1.78±0.32 
2.22±0.15 1.72±0.06 4.73±0.01 2.07±0.03 1.23±0.22 2.68±0.60 
2.34±0.15 1.75±0.05 1.63±0.12 1.23±0.23 
2.17±0.12 1.69±0.06 1.22±0.21 3.28±0.47 
2.12±0.11 1.93±0.05 1.20±0.23 
2.11±0.13 1.83±0.07 1.25±0.21 
2.05±0.12 1.99±0.05 
2.01±0.14 
2.16±0.18 
10 2.13±0.11 
11 2.41±0.14 

All sounds were played back at 20 dB (RMS fast) above mean hearing threshold of each species. Pc, Platydoras costatus; Pp, Pimelodus pictus;Bm2, Botia modesta two-pulsed sound; Bm3, B. modestathree-pulsed sound; Tv, Trichopsis vittata; Lg, Lepomis gibbosus(latency values of pulses 1 and 4 from the modified sound with pulses 2 and 3 omitted; values for pulse 2 were measured after a point-to-point subtraction of the response to the complete conspecific sound from the modified sound; see also Fig. 3).

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