Table 2. Overview of descriptive statistics of advertisement calls of Microhyla nilphamariensis males (N = 18) from Delhi and M. ornata from Western Coast (N = 5) and Sri Lanka (N = 5).
Shown here are the means (X), standard deviation (SD) and range of individual means.
|
M. nilphamariensis, Delhi (N = 18) |
M. ornata, Western Coast (N = 5) | M. ornata, Sri Lanka (N = 5) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Type of acoustic property | Property | S.D. | Mean range | S.D. | Mean range | S.D. | Mean range | |||
| Entire call | ||||||||||
| Temporal call properties | Call duration (ms) | 393.5 | 57.5 | 274–492.2 | 263.6 | 12.7 | 246.1–281.6 | 292.4 | 22.3 | 262.1–323.7 |
| Call rise time (ms) | 174.2 | 77.8 | 64.1–304.7 | 147.0 | 25.1 | 117.8–183.5 | 166.2 | 25.4 | 122.8–187.5 | |
| Call fall time (ms) | 163.9 | 53.1 | 74.6–248.5 | 65.4 | 2.4 | 63.2–68.1 | 97.2 | 14.2 | 82.7–118.0 | |
| # Pulses per call* | 17.0 | 2.4 | 12.5–20 | 11.0 | 2 | 9.6–1.9 | 13.0 | 1 | 12.0–14.0 | |
| Pulse rate (pulses/s) | 39 | 2.5 | 33.8–44 | 38.1 | 1.3 | 36.9–39.8 | 41.6 | 0.9 | 40.4–42.7 | |
| Spectral call properties | Overall dominant frequency (kHz) | 2.8 | 0.8 | 1.5–4.1 | 2.7 | 0.1 | 2.5–2.9 | 3.3 | 0.0 | 3.3–3.3 |
| Overall dominant frequency 1 (kHz) | 1.6 | 0.1 | 1.6–1.7 | 1.3 | 0.0 | 1.2–1.3 | 1.6 | 0.0 | 1.6–1.6 | |
| Overall dominant frequency 2 (kHz) | 3.5 | 0.3 | 3–4.1 | 2.6 | 0.2 | 2.3–2.9 | 3.3 | 0.0 | 3.2–3.3 | |
| Pulse properties | ||||||||||
| First, middle and N-1 pulses | First pulse period (ms) | 25.2 | 2.2 | 21.5–31.4 | 25.9 | 1.2 | 24.0–27.1 | 27.7 | 5.0 | 24.7–36.5 |
| Middle pulse period (ms) | 25.8 | 1.7 | 23.1–29.7 | 26.4 | 0.9 | 25.2–27.5 | 23.9 | 0.2 | 23.6–24.2 | |
| “N-1” pulse period (ms) | 25 | 3.2 | 16.6–28.8 | 26.1 | 2.0 | 23.2–28.6 | 22.6 | 0.4 | 22.0–22.9 | |
| Spectral properties maximum pulse | Overall pulse dominant frequency (kHz) | 2.8 | 0.7 | 1.7–3.9 | 2.7 | 0.2 | 2.5–2.9 | 3.3 | 0.0 | 3.3–3.3 |
| Pulse dominant frequency 1 (kHz) | 1.6 | 0.1 | 1.6–1.7 | 1.3 | 0.0 | 1.2–1.3 | 1.6 | 0.0 | 1.6–1.7 | |
| Pulse dominant frequency 2 (kHz) | 3.6 | 0.3 | 3–4 | 2.7 | 0.2 | 2.6–3.0 | 3.3 | 0.0 | 3.3–3.3 | |
| Temporal properties maximum pulse | Pulse period (s) | 25.9 | 1.8 | 22.4–29.9 | 26.4 | 0.9 | 25.1–27.3 | 24.2 | 0.4 | 23.6–24.5 |
| Pulse duration (ms) | 5.3 | 1.3 | 3.5–8.5 | 5.1 | 1.1 | 3.6–6.5 | 5.4 | 0.5 | 4.5–5.8 | |
| Pulse rise time (ms) | 0.9 | 0.2 | 0.7–1.3 | 1.2 | 0.2 | 1.1–1.4 | 1.3 | 0.0 | 1.2–1.3 | |
| Pulse 50% rise time (ms) | 0.7 | 0.1 | 0.5–0.9 | 0.9 | 0.1 | 0.8–1.0 | 0.7 | 0.0 | 0.6–0.7 | |
| Pulse fall time (ms) | 4.3 | 1.4 | 2.4–7.8 | 4.1 | 1.0 | 2.5–5.4 | 4.2 | 0.5 | 3.3–4.5 | |
| Pulse 50% fall time (ms) | 3.7 | 1.3 | 1.9–6.3 | 3.3 | 1.0 | 1.7–4.6 | 3.5 | 0.5 | 2.7–3.9 | |
Notes.
*
For pulses per call (highlighted in bold), the values reported in the columns headed X and SD are the median and interquartile range.