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Table 1 Values (mean ± SD) of oral and nasal hind call variables and repeated measures ANOVA results for comparison the mean values between 2011 and 2012 years separately for oral and nasal calls

From: Between-year vocal aging in female red deer (Cervus elaphus)

Acoustic variable

Nasal calls (n = 13 hinds)

Oral calls (n = 7 hinds)

2011

2012

ANOVA

2011

2012

ANOVA

duration (s)

0.84 ± 0.29

0.81 ± 0.28

F1,12 =  0.16; p  = 0.69

0.68 ± 0.21

0.68 ± 0.22

F1,6 =  0.03; p  = 0.88

f0beg (Hz)

139 ± 23

127 ± 30

F 1,12  =   8.41; p   =   0.013

141 ± 28

129 ± 16

F1,6 =  2.08; p  = 0.20

f0max (Hz)

180 ± 31

173 ± 30

F 1,12  =  5.21; p   =  0.04

184 ± 27

178 ± 34

F1,6 =  0.53; p  = 0.49

f0end (Hz)

88 ± 14

81 ± 21

F1,12 = 3.16; p  = 0.10

88 ± 7

83 ± 7

F 1,6  =  7.14; p   =  0.037

df0 (Hz)

91 ± 26

78 ± 24

F 1,12  =  15.82; p   = 0.002

96 ± 26

82 ± 31

F1,6 =  2.12; p  = 0.20

fpeak (Hz)

1076 ± 515

808 ± 601

F1,12 =  4.16; p  = 0.06

1404 ± 308

1063 ± 308

F1,6 =  3.75; p  = 0.10

q25 (Hz)

681 ± 186

667 ± 227

F1,12 =  0.07; p  = 0.80

903 ± 218

887 ± 268

F1,6 =  0.03; p  = 0.88

q50 (Hz)

1571 ± 261

1627 ± 282

F1,12 =  0.88; p  = 0.37

1699 ± 123

1667 ± 261

F1,6 =  0.11; p  = 0.76

q75 (Hz)

2526 ± 171

2739 ± 318

F1,12 =  4.09; p  = 0.07

2532 ± 180

2616 ± 209

F1,6 =  1.21; p  = 0.31

  1. Designations: duration—call duration; f0beg—the fundamental frequency at the onset of a call; f0max—the maximum fundamental frequency of a call; f0end—the fundamental frequency at the end of a call; df0—the depth of frequency modulation, calculated as the difference between f0max and f0min; fpeak—the frequency of maximum amplitude within a call; q25, q50, q75—the lower, medium and upper quartiles of a call. Significant differences are highlighted in underlined