Lab^{*} | Field | |||||||
---|---|---|---|---|---|---|---|---|
Mean | s.e.m. | Max | N | Mean | s.e.m. | Max | N | |
Total train (includes both stationary and helical phases) | ||||||||
Pulses per train | 12.79 | 0.30 | 19 | 161 | 12.26 | 0.91 | 19 | 23 |
Mean and max train length (vertical) (cm)^{†} | 37.29 | – | 60.7 | – | 35.29 | – | 60.7 | – |
Mean and max train duration (s) | 10.86 | 0.29 | 16.3 | 85 | 10.10^{†} | – | 14.12^{†} | – |
Swimming speed (cm s^{–1}) | 7.76 | 0.55 | 4 | |||||
Stationary phase | ||||||||
Swimming speed (cm s^{–1}) | 7.16 | 0.137 | 9.2 | 4 | ||||
Distance: horizontal (cm) | –0.08 | 0.240 | 5.26 | 85 | ||||
Distance: vertical (cm) | –0.31 | 0.21 | 3.59 | 85 | ||||
Helical phase (see also Fig. 6) | ||||||||
Pulse number after which helical phase starts | 2.85 | 0.02 | 6 | 85 | ||||
Swimming speed (actual) (cm s^{–1}) | 8.39 | 0.192 | 13.3 | 8 | ||||
Vertical swimming speed (apparent) (cm s^{–1})^{‡} | 5.41 | |||||||
Mean width of helix (cm) | 0.73 | 0.02 | 0.83 | 8 | ||||
Length of one spiral (cm) | 1.96 | |||||||
Duration of one spiral (ms) | 390 | |||||||
Spirals per interpulse | 1.92 | |||||||
Mean pulse duration (ms) (from Table 2) | 210 | 03 | 129 | |||||
Mean interpulse interval (ms) (from Table 2) | 750 | 07 | 494 | |||||
Mean interpulse distance (cm) (from Table 2) | 3.77 | 0.05 | 494 |
↵* Lab observations with five males (four of them participating in courtship behavior) in the aquarium per trial
↵† Distances and durations extrapolated after pulse 11 with mean lab interpulse interval and distance of the helical phase (because these values were extrapolated, s.e.m. and N values are not applicable)
↵‡ The slope of the mean interpulse intervals plotted against mean interpulse distances r^{2}=0.999 (see also Fig. 5)