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Table 1.

Fin and axial coordination of slow swimming

VariableTime (ms)s.e.m.
Tail beat duration 39.30 0.60 
Fin abduction duration 18.30 0.54 
Fin adduction duration 17.67 0.44 
Refractory period 5.27 0.62 
Abduction/adduction cycle 35.97 0.81 
Abduction/adduction cycle, including refractory period 41.23 0.78 
Fin 1, maximum lateral abduction –0.10 0.14 
Tail position 1, at maximal axial curvature 1* 0.00 
Fin 2, maximum lateral abduction 19.80 0.65 
Tail position 2, at maximal axial curvature 21.17 0.47 
Fin 3, maximum lateral abduction 40.07 0.78 
Tail position 3 of maximal axial curvature 40.30 0.60 
VariableTime (ms)s.e.m.
Tail beat duration 39.30 0.60 
Fin abduction duration 18.30 0.54 
Fin adduction duration 17.67 0.44 
Refractory period 5.27 0.62 
Abduction/adduction cycle 35.97 0.81 
Abduction/adduction cycle, including refractory period 41.23 0.78 
Fin 1, maximum lateral abduction –0.10 0.14 
Tail position 1, at maximal axial curvature 1* 0.00 
Fin 2, maximum lateral abduction 19.80 0.65 
Tail position 2, at maximal axial curvature 21.17 0.47 
Fin 3, maximum lateral abduction 40.07 0.78 
Tail position 3 of maximal axial curvature 40.30 0.60 

All values are given as mean of three trials for each of 10 individuals for slow swimming (N=30 for each entry) during three complete fin beat cycles. Maximal axial curvature as defined by Budick and O'Malley(2000). *Tail position one used as a reference for coordination calculations. A repeated measures analysis of variance found no significant differences(P>0.05) between tail position and fin extension position indicating coordination between the two.

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