Table 2
Mean tilt angles (<θ>) with standard deviations (S θ ) used in estimating the mean TS of cuttlebone at 70 and 120 kHz (Lee and Demer 2014). The TS and θ for live cuttlefish were simultaneously measured by a split-beam echo sounder and a CCTV system, respectively

Specimen No.

70 kHz

120 kHz

M. tilt angle (deg)

Standard dev. (deg)

N

M. tilt angle (deg)

Standard dev. (deg)

N

1

−3.08

12.64

14

−3.15

3.27

16

2

−1.71

6.21

15

−3.01

5.46

15

3

−2.96

7.39

15

−4.77

6.23

15

4

−3.01

9.19

15

−2.01

2.93

15

5

−2.29

2.32

15

−2.29

2.33

15

6

−1.93

3.83

15

−3.03

4.99

15

7

−1.75

5.41

15

−4.23

6.45

15

8

−2.71

9.61

14

−4.87

3.91

14

9

−2.71

5.99

15

−3.25

5.49

15

10

−1.17

3.37

15

−5.11

4.10

15

11

−2.39

5.28

15

−4.61

5.76

15

12

−1.05

6.76

15

−2.37

5.67

15

13

−3.51

8.52

15

−4.55

4.46

15

14

−1.21

3.63

15

−0.73

5.24

15

15

−1.91

6.84

15

−2.39

3.03

15

16

−1.71

6.44

15

−1.43

5.56

15

17

−3.27

6.53

15

−2.77

6.86

15

18

−2.97

6.17

15

−3.07

4.71

15

19

−2.61

8.56

15

−2.13

3.68

15

mean

−2.31

6.56

−3.15

4.74