Table 1 Summary of parameters associated with males, prey, and background noise vibrations on webs of Latrodectus hesperus (top) and Tegenaria agrestis (bottom)

Dominant frequency (Hz)

43.38 (26.78)

55.38 (31.65)

36.58 (16.9)

36.6 (16.77)

52.34 (25.28)

31.82 (16.29)

28.57 (17.41)

32.63 (16.41)

Bandwidth (Hz)

43.38 (29.42)

44.73 (39.85)

44.96 (71.56)

4.1 (2.79)

74.8 (75.5)

45.4 (34.57)

54.73 (53.02)

RMS amplitude (mm/s)

0.46 (0.61)

1.53 (0.94)

1.32 (0.87)

3.73 (3.09)

0.60 (0.34)

0.88 (0.83)

3.27 (2.59)

0.03 (0.01)

Max amplitude (mm/s)

1.85 (2.35)

14.44 (11.73)

6.04 (4.05)

17.91 (10.66)

6.27 (4.42)

7.58 (8.71)

21.25 (15.72)

0.10 (0.04)

A.M.F

3.91 (1.20)

14.69 (12.08)

8.12 (5.55)

11.50 (6.75)

9.65 (9.55)

33.78 (33.16)

51.56 (48.07)

Duration (s)

6.45 (3.0)

8.06 (4.12)

8.59 (4.31)

1.0 (0.04)

9.31 (2.43)

1.38 (1.0)

2.01 (0.8)

n

17

18

4

4

16

16

16

48

Palp drumming

Walking, drumming tapping

Jerk

Stretch

All

Cricket

Fly

Dominant frequency (Hz)

32.83 (19.91)

40.64 (18.56)

50.88 (8.85)

54.46 (25.79)

44.31 (20.08)

45.88 (28.11)

40.57 (39.01)

34.14 (20.58)

Band-width (Hz)

92.63 (63.35)

71.38 (18.75)

63.35 (18.96)

107.31 (113.6)

65.34 (21.54)

105.18 (85.82)

54.39 (38.77)

RMS amplitude (mm/s)

0.21 (0.16)

2.19 (1.98)

3.52 (4.63)

4.05 (3.88)

0.86 (0.58)

0.42 (0.30)

1.81 (2.22)

0.02 (0.01)

Max amplitude (mm/s)

1.36 (1.04)

20.37 (19.41)

19.13 (25.91)

28.54 (30.11)

8.27 (5.86)

2.92 (2.21)

7.06 (6.0)

0.05 (0.02)

A.M.F

5.37 (2.91)

29.95 (17.88)

10.34 (3.72)

7.49 (5.46)

14.49 (14.85)

23.04 (34.13)

34.29 (42.0)

Duration (s)

7.25 (3.39)

9.62 (3.17)

1.58 (1.20)

1.43 (1.24)

6.35 (2.73)

1.44 (0.47)

2.59 (1.12)

n

10

13

6

9

16

16

16

38