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Table 1.

Summary statistics of DPIV variables in Triakis semifasciata and Chiloscyllium punctatum holding position at 1.0Ls-1 and during vertical maneuvering in Triakis semifasciata

Chiloscyllium punctatumTriakis semifasciata
VariableHold, BHold, LRise, RSink, SP-valueSNK
Vertical body velocity (cm s-10.39±0.243 0.43±0.296 2.23±0.632 -5.7±1.530 0.0004* BLR>S 
Body angle (degrees) 9±1.638 11±0.995 19±1.498 -3±2.441 0.0001* R>BL>S 
Path of motion angle (degrees) 1.0±0.448 0.2±0.422 5.7±1.541 -11.8±3.294 0.0002* R>LB>S 
Ring axis angle (degrees) 125±4.701 120±3.120 135±2.881 101±7.431 0.0011* BLR>S 
Jet angle (degrees) -44.5±3.642 -38.6±4.190 -34.7±5.767 -7.1±(3.538 0.0010* BLR<S 
Tail angle (degrees) 163±1.511 156±1.140 156±1.902 154±1.218 0.0022* B>LRS 
Chiloscyllium punctatumTriakis semifasciata
VariableHold, BHold, LRise, RSink, SP-valueSNK
Vertical body velocity (cm s-10.39±0.243 0.43±0.296 2.23±0.632 -5.7±1.530 0.0004* BLR>S 
Body angle (degrees) 9±1.638 11±0.995 19±1.498 -3±2.441 0.0001* R>BL>S 
Path of motion angle (degrees) 1.0±0.448 0.2±0.422 5.7±1.541 -11.8±3.294 0.0002* R>LB>S 
Ring axis angle (degrees) 125±4.701 120±3.120 135±2.881 101±7.431 0.0011* BLR>S 
Jet angle (degrees) -44.5±3.642 -38.6±4.190 -34.7±5.767 -7.1±(3.538 0.0010* BLR<S 
Tail angle (degrees) 163±1.511 156±1.140 156±1.902 154±1.218 0.0022* B>LRS 

These mean values result from using the a priori classification of locomotor behavior into three discrete classes: holding position, rising and sinking.

Values are means ± S.E.M. for five sequences in each of three individuals (total N=15 for each column).

L, total body length.

*

Significant at the Bonferroni corrected P-value of 0.008.

Student-Newman-Keuls comparison among behaviors within Triakis semifasciata.

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