Table 3 Values (mean ± SD) of acoustic parameters for the call types of Amur tiger cubs. The total number of each call type is given in the parentheses

Duration

0.80 ± 0.36

0.95 ± 0.65

0.32 ± 0.07

1.60 ± 0.93

0.60 ± 0.88

1.78 ± 1.16

0.69 ± 0.32

0.71 ± 0.27

0.38 ± 0.19

MaxFreq

0.41 ± 0.24

0.42 ± 0.40

0.14 ± 0.07

0.64 ± 0.65

0.27 ± 0.54

0.52 ± 0.56

0.19 ± 0.11

0.37 ± 0.25

0.14 ± 0.06

RiseTime

2.17 ± 0.72

0.89 ± 0.57

0.23 ± 0.13

0.26 ± 0.24

0.37 ± 0.24

0.17 ± 0.11

0.34 ± 0.42

0.43 ± 0.36

0.62 ± 0.30

F0

0.46 ± 0.28

0.20 ± 0.06

0.19 ± 0.04

0.17 ± 0.08

0.16 ± 0.05

0.12 ± 0.03

0.16 ± 0.03

–

0.17 ± 0.04

SDF0

0.09 ± 0.05

0.04 ± 0.02

0.03 ± 0.02

0.04 ± 0.05

0.02 ± 0.01

0.03 ± 0.01

0.04 ± 0.01

–

0.04 ± 0.02

MaxF0

0.59 ± 0.32

0.26 ± 0.08

0.25 ± 0.10

0.24 ± 0.13

0.20 ± 0.06

0.18 ± 0.04

0.22 ± 0.05

–

0.24 ± 0.06

MinF0

0.26 ± 0.24

0.13 ± 0.05

0.12 ± 0.04

0.08 ± 0.03

0.12 ± 0.05

0.05 ± 0.03

0.08 ± 0.03

–

0.10 ± 0.03

Freq25

1.70 ± 0.47

0.59 ± 0.35

0.28 ± 0.15

0.20 ± 0.12

0.26 ± 0.13

0.16 ± 0.14

0.21 ± 0.13

0.38 ± 0.18

0.38 ± 0.17

Freq50

2.11 ± 0.61

0.82 ± 0.41

0.51 ± 0.35

0.30 ± 0.19

0.38 ± 0.17

0.25 ± 0.25

0.35 ± 0.28

0.59 ± 0.31

0.55 ± 0.19

Freq75

2.73 ± 0.91

1.08 ± 0.46

0.99 ± 0.71

0.42 ± 0.31

0.52 ± 0.22

0.38 ± 0.37

0.58 ± 0.45

1.00 ± 0.49

0.72 ± 0.18

IQRBW

1.03 ± 0.61

0.49 ± 0.24

0.71 ± 0.60

0.22 ± 0.21

0.26 ± 0.15

0.22 ± 0.25

0.37 ± 0.35

0.62 ± 0.36

0.34 ± 0.14

PulseNum

–

–

4.30 ± 1.03

82.00 ± 50.23

–

61.16 ± 42.31

–

–

–

PulseRate

–

–

19.03 ± 2.09

53.21 ± 9.83

–

35.70 ± 9.02

–

–

–