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Table 1.

Display train characteristics

Lab*
Field
Means.e.m.MaxNMeans.e.m.MaxN
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–17.76 0.55      
Stationary phase         
   Swimming speed (cm s–17.16 0.137 9.2     
   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 85     
   Swimming speed (actual) (cm s–18.39 0.192 13.3     
   Vertical swimming speed (apparent) (cm s–1) 5.41        
   Mean width of helix (cm) 0.73 0.02 0.83     
   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*
Field
Means.e.m.MaxNMeans.e.m.MaxN
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–17.76 0.55      
Stationary phase         
   Swimming speed (cm s–17.16 0.137 9.2     
   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 85     
   Swimming speed (actual) (cm s–18.39 0.192 13.3     
   Vertical swimming speed (apparent) (cm s–1) 5.41        
   Mean width of helix (cm) 0.73 0.02 0.83     
   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 r2=0.999 (see also Fig. 5)

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