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Table 1 Values of measured variables and their relationships with birch mouse sex, individuality and body mass

From: High frequency audible calls in northern birch mice Sicista betulina in response to handling: effects of individuality, sex and body mass on the acoustics

Variable Mean ± SD value ANOVA Pearson correlation with log body mass
All animal calls Male calls Female calls Sex Individual identity
Duration (s) 0.46 ± 0.17 0.42 ± 0.17 0.54 ± 0.15 F1,196 = 39.7; p < 0.001 F9,196 = 22.8; p < 0.001 r = 0.29; p = 0.42
f0max (kHz) 8.81 ± 0.61 8.83 ± 0.63 8.78 ± 0.57 F1,196 = 0.08; p = 0.78 F9,196 = 67.8; p < 0.001 r = 0.18; p = 0.62
f0min (kHz) 7.61 ± 0.75 7.79 ± 0.55 7.31 ± 0.94 F1,196 = 65.6; p < 0.001 F9,196 = 82.5; p < 0.001 r = − 0.05; p = 0.90
f0beg (kHz) 8.70 ± 0.71 8.70 ± 0.74 8.70 ± 0.65 F1,196 = 2.06; p = 0.15 F9,196 = 76.9; p < 0.001 r = 0.09; p = 0.80
f0end (kHz) 7.95 ± 0.59 7.93 ± 0.57 7.99 ± 0.63 F1,196 = 2.93; p = 0.09 F9,196 = 29.3; p < 0.001 r = 0.28; p = 0.43
fpeak (kHz) 8.05 ± 0.74 8.14 ± 0.56 7.90 ± 0.98 F1,196 = 6.23; p = 0.01 F9,196 = 53.7; p < 0.001 r = − 0.16; p = 0.65
q25 (kHz) 7.92 ± 0.67 8.02 ± 0.56 7.75 ± 0.81 F1,196 = 16.3; p < 0.001 F9,196 = 68.3; p < 0.001 r = − 0.06; p = 0.87
q50 (kHz) 8.34 ± 0.68 8.31 ± 0.50 8.38 ± 0.93 F1,196 = 2.38; p = 0.12 F9,196 = 13.2; p < 0.001 r = − 0.01; p = 0.99
q75 (kHz) 9.40 ± 1.72 8.87 ± 0.65 10.33 ± 2.47 F1,196 = 73.1; p < 0.001 F9,196 = 24.8; p < 0.001 r = − 0.11; p = 0.75
Bandwidth (kHz) 0.73 ± 0.36 0.70 ± 0.34 0.77 ± 0.39 F1,196 = 2.06; p = 0.15 F9,196 = 6.67; p < 0.001 r = − 0.15; p = 0.67
Body mass (g) 12.63 ± 2.23 12.59 ± 2.21 12.74 ± 2.76 F1,8 = 0.01; p = 0.93   
  1. Designations: duration—call duration; f0max—the maximum fundamental frequency; f0min—the minimum fundamental frequency; f0beg—the start fundamental frequency; f0end—the end fundamental frequency; fpeak—the frequency of maximum amplitude; q25, q50, q75—lower, medium and upper quartiles; bandwidth—the bandwidth of the fpeak at the distance of 10 dB from the maximum; p estimates less than 0.05 are shown in underline