Table 1.
Signal plasticity of ten males entrained to a periodic conspecific signal gradually increasing in rate (stimulus amplitude = 70 dB SPL)
| Male # | Chirp duration, L (ms) | Chirp duration, F (ms) | Chirp shortening (ms) | Δt leading to chirp shortening (ms) | L–F syllable difference (N) |
|---|---|---|---|---|---|
| 1 | 217.8 | 193.0 | 24.8 | 140–290 | 1.2 |
| 2 | 238.4 | 208.3 | 30.1 | 70–316 | 1.5 |
| 3 | 202.3 | 168.4 | 33.9 | 51–122 | 1.5 |
| 4 | 203.9 | 185.0 | 18.9 | 140–268 | 1.1 |
| 5 | 246.3 | 224.3 | 22.0 | 100–274 | 0.8 |
| 6 | 262.7 | 221.0 | 41.7 | 60–252 | 1.7 |
| 7 | 249.8 | 216.3 | 33.5 | 93–287 | 1.6 |
| 8 | 236.9 | 221.1 | 15.8 | 61–246 | 1.2 |
| 9 | 278.6 | 212.0 | 66.6 | 50–127 | 3.2 |
| 10 | 278.2 | 210.1 | 68.1 | 52–173 | 2.9 |
| Mean | 241.5 | 206.0* | 35.5 | 81.7–235.5 | 1.7* |
| SD | 27.5 | 18.2 | 18.4 | 35.2–69.6 | 0.8 |
L leader, F follower, Δt delay between leader and follower signal onset
* Significant difference (P < 0.001) between leader and follower signals (paired t test)