Skip to Main Content
Table 1.

Results of statistical comparisons between Sparisoma radians and Scarus quoyi for kinematic variables during feeding, tested with a two-way analysis of variance

Sparisoma
Scarus
VariableMeanCVMeanCVF ratioP
Body movements       
Maximum velocity (BL s−11.117±0.151 0.30±0.19 0.949±0.116 0.37±0.13 0.5166 NS 
Time to maximum velocity (s) −0.0533±0.0151 0.73±0.47 −0.184±0.0412 0.81±0.33 2.4304 NS 
Time to max. acceleration (s) −0.0213±0.0158 4.97±4.78 0.00133±0.00421 1.55±0.74 1.2149 NS 
Maximum acceleration (cm s−2346.19±41.69 0.10±0.05 413.743±78.341 0.36±0.14 0.3182 NS 
Change in body angle (deg.) 14.94±2.55 0.36±0.06 10.50±1.77 0.39±0.21 8.5438 ** 
Gape       
Gape (cm) 1.2406±0.1098 0.19±0.14 0.8677±0.0433 0.14±0.05 4.6587 * 
Adjusted gape (cm BL−10.0878±0.0252 0.19±0.14 0.0830±0.0038 0.14±0.05 1.4092 NS 
Gape duration (s) 0.208±0.012 0.17±0.06 0.204±0.016 0.27±0.07 1.7107 NS 
Time to max gape (s) −0.0807±0.1371 0.19±0.14 −0.0425±0.0093 0.14±0.05 2.5421 NS 
Gape angle (deg.) 86.863±5.781 0.10±0.04 100.752±4.323 0.13±0.04 2.4948 NS 
Jaw protrusion       
Jaw protrusion (cm) 0.0191±0.0063 1.47±0.08 0.0374±0.0039 0.61±0.20 5.5941 * 
Jaw protrusion duration (s) 0.176±0.0393 0.27±0.24 0.1471±0.0112 0.41±0.13 4.5914 * 
Time to max. jaw protrusion (s) −0.1376±0.0286 0.11±0.12 −0.0480±0.01776 0.26±0.08 1.1171 NS 
Cranial elevation       
Cranial elevation (deg.) 0.7332±0.1211 0.96±0.19 1.160±0.082 0.68±0.17 8.5101 ** 
Cranial elevation duration (s) 0.232±0.0237 0.14±0.08 0.1592±0.0250 0.23±0.07 1.0100 NS 
Time to max. cranial elevation (s) −0.0667±0.0471 0.13±0.08 −0.1748±0.0320 0.36±0.11 1.7856 NS 
Eye movement       
Maximum eye movement (cm) 0.0913±0.0101 0.29±0.17 0.1137±0.0147 0.39±0.17 1.9595 NS 
Eye movement duration (s) 0.1973±0.0257 0.31±0.16 0.1502±0.0173 0.32±0.11 1.2530 NS 
Time to maximum eye movement (s) −0.1733±0.0291 0.21±0.15 −0.1785±0.0394 0.44±0.11 1.1358 NS 
Pectoral fin movement       
Cruising       
Protraction magnitude (deg.) 37.384±7.5413 0.45±0.03 48.0137±16.1412 0.40±0.09 0.7851 NS 
Protraction duration (s) 0.1296±0.021 0.42±0.22 0.164±0.0609 0.62±0.25 0.2778 NS 
Abduction magnitude (deg.) 55.187±7.6716 0.32±0.1268 49.1985±4.6961 0.26±0.06 0.0781 NS 
Abduction duration (s) 0.1808±0.0484 0.43±0.3804 0.2453±0.0398 0.09±0.10 0.6748 NS 
Braking       
Protraction magnitude (deg.) 48.2706±12.1341 0.31±0.07 85.1625±8.3506 0.37±0.13 10.595 * 
Protraction onset (s) −0.028±0.0205 1.57±0.96 −0.0386±0.0104 0.85±0.27 0.0539 NS 
Protraction duration (s) 0.0933±0.0209 0.54±0.30 0.1126±0.0098 0.31±0.14 0.0462 NS 
Abduction magnitude (deg.) 41.8746±9.5154 0.55±0.28 46.0302±4.923 0.18±0.09 0.3334 NS 
Abduction onset (s) −0.0608±0.025 0.66±0.62 0.0032±0.013 3.88±2.28 2.7195 NS 
Abduction duration (s) 0.1104±0.0245 0.35±0.42 0.0664±0.0079 0.22±0.06 1.1101 NS 
Sparisoma
Scarus
VariableMeanCVMeanCVF ratioP
Body movements       
Maximum velocity (BL s−11.117±0.151 0.30±0.19 0.949±0.116 0.37±0.13 0.5166 NS 
Time to maximum velocity (s) −0.0533±0.0151 0.73±0.47 −0.184±0.0412 0.81±0.33 2.4304 NS 
Time to max. acceleration (s) −0.0213±0.0158 4.97±4.78 0.00133±0.00421 1.55±0.74 1.2149 NS 
Maximum acceleration (cm s−2346.19±41.69 0.10±0.05 413.743±78.341 0.36±0.14 0.3182 NS 
Change in body angle (deg.) 14.94±2.55 0.36±0.06 10.50±1.77 0.39±0.21 8.5438 ** 
Gape       
Gape (cm) 1.2406±0.1098 0.19±0.14 0.8677±0.0433 0.14±0.05 4.6587 * 
Adjusted gape (cm BL−10.0878±0.0252 0.19±0.14 0.0830±0.0038 0.14±0.05 1.4092 NS 
Gape duration (s) 0.208±0.012 0.17±0.06 0.204±0.016 0.27±0.07 1.7107 NS 
Time to max gape (s) −0.0807±0.1371 0.19±0.14 −0.0425±0.0093 0.14±0.05 2.5421 NS 
Gape angle (deg.) 86.863±5.781 0.10±0.04 100.752±4.323 0.13±0.04 2.4948 NS 
Jaw protrusion       
Jaw protrusion (cm) 0.0191±0.0063 1.47±0.08 0.0374±0.0039 0.61±0.20 5.5941 * 
Jaw protrusion duration (s) 0.176±0.0393 0.27±0.24 0.1471±0.0112 0.41±0.13 4.5914 * 
Time to max. jaw protrusion (s) −0.1376±0.0286 0.11±0.12 −0.0480±0.01776 0.26±0.08 1.1171 NS 
Cranial elevation       
Cranial elevation (deg.) 0.7332±0.1211 0.96±0.19 1.160±0.082 0.68±0.17 8.5101 ** 
Cranial elevation duration (s) 0.232±0.0237 0.14±0.08 0.1592±0.0250 0.23±0.07 1.0100 NS 
Time to max. cranial elevation (s) −0.0667±0.0471 0.13±0.08 −0.1748±0.0320 0.36±0.11 1.7856 NS 
Eye movement       
Maximum eye movement (cm) 0.0913±0.0101 0.29±0.17 0.1137±0.0147 0.39±0.17 1.9595 NS 
Eye movement duration (s) 0.1973±0.0257 0.31±0.16 0.1502±0.0173 0.32±0.11 1.2530 NS 
Time to maximum eye movement (s) −0.1733±0.0291 0.21±0.15 −0.1785±0.0394 0.44±0.11 1.1358 NS 
Pectoral fin movement       
Cruising       
Protraction magnitude (deg.) 37.384±7.5413 0.45±0.03 48.0137±16.1412 0.40±0.09 0.7851 NS 
Protraction duration (s) 0.1296±0.021 0.42±0.22 0.164±0.0609 0.62±0.25 0.2778 NS 
Abduction magnitude (deg.) 55.187±7.6716 0.32±0.1268 49.1985±4.6961 0.26±0.06 0.0781 NS 
Abduction duration (s) 0.1808±0.0484 0.43±0.3804 0.2453±0.0398 0.09±0.10 0.6748 NS 
Braking       
Protraction magnitude (deg.) 48.2706±12.1341 0.31±0.07 85.1625±8.3506 0.37±0.13 10.595 * 
Protraction onset (s) −0.028±0.0205 1.57±0.96 −0.0386±0.0104 0.85±0.27 0.0539 NS 
Protraction duration (s) 0.0933±0.0209 0.54±0.30 0.1126±0.0098 0.31±0.14 0.0462 NS 
Abduction magnitude (deg.) 41.8746±9.5154 0.55±0.28 46.0302±4.923 0.18±0.09 0.3334 NS 
Abduction onset (s) −0.0608±0.025 0.66±0.62 0.0032±0.013 3.88±2.28 2.7195 NS 
Abduction duration (s) 0.1104±0.0245 0.35±0.42 0.0664±0.0079 0.22±0.06 1.1101 NS 

BL, body length.

Spatial and temporal kinematic values are means ± s.e.m., and the variability of these parameters is represented by the mean coefficient of variation (CV ± s.e.m.) taken from individuals and pooled for each species.

NS, P>0.05; *P<0.05; **P<0.01. There were no significant intraspecies differences.

Close Modal

or Create an Account

Close Modal
Close Modal