Table 1. Comparison between laboratory- and wild-recorded 1SVs with Mann-Whitney U statistics.
| wild | laboratory | |||||||
| (n = 6c) | (n = 25) | |||||||
| Acoustic Variable | Median | Q25 | Q75 | Median | Q25 | Q75 | U(b) | P |
| Duration (ms) | 140.23 | 108.00 | 173.00 | 197.00 | 175.60 | 223.70 | 18.0 | 0.0027* |
| Start Freq (kHz) | 20.55 | 20.55 | 31.70 | 18.00 | 17.00 | 19.50 | ||
| End Freq (kHz) | 18.76 | 18.50 | 27.80 | 16.60 | 16.10 | 18.50 | ||
| Max Freq (kHz) | 21.21 | 20.50 | 32.20 | 18.50 | 18.00 | 20.00 | ||
| Min Freq (kHz) | 18.33 | 17.00 | 26.80 | 14.60 | 15.60 | 17.50 | ||
| Freq Max Amp (kHz) | 19.69 | 19.50 | 32.2 | 17.50 | 15.60 | 10.00 | ||
| Bandwidth (kHz) | 3.20 | 2.50 | 3.78 | 2.90 | 2.00 | 3.50 | 53.5 | 0.2906 |
| Internal Modulation | 42661.63 | 20818.38 | 56074.77 | 21428.57 | 16287.88 | 35409.04 | 52.0 | 0.2683 |
| Overall Modulation | 15739.69 | 9175.75 | 23251.49 | 6993.29 | 2682.91 | 10233.44 | 22.0 | 0.0061* |
| PC1 (a) | −0.28 | −2.93 | −0.16 | 0.33 | 0.01 | 0.57 | 19.0 | 0.0033* |
(a)
PC1 = First principal component of Frequency Variables.
(b)
Mann-Whitney U test statistics for test between captive and wild recorded vocalizations from P. californicus on 5 spectral variables. Mann-Whitney U tests significant (*) at p<0.01. Median values (with 25% and 75% quartiles) and samples size from Mann-Whitney U tests are shown.
(c)
Data are from 6 individuals and 9 vocalizations.