Skip to Main Content
Table 4.

Select results from partial correlation analysis and simple linear regressionscorrelating absolute dependent variables (dep. var.) with basilisk mass as the independent variable


Dependent variables

p1

p2

r2mass

p3

p4

r2velocity

r2mass×velocity

P
ΔXknee(cm) 12.46 0.09 0.197 13.30 0.79 0.505 0.344 0.075 
ΔYknee(cm)* 2.09 0.27 0.842 4.96 —0.02 0.000 0.844 <0.001 
ΔZknee(cm)* 0.90 0.35 0.799 3.07 —0.42 0.073 0.887 <0.001 
ΔXankle(cm) 12.53 0.09 0.186 13.20 0.84 0.525 0.336 0.081 
ΔYankle(cm)* 2.13 0.29 0.955 5.39 —0.09 0.005 0.968 <0.001 
ΔZankle(cm)* 2.31 0.08 0.133 2.45 0.62 0.333 0.173 <0.001 
Yhip,ff (cm) 3.06 —0.24 0.227 0.87 1.88 0.281 0.349 0.072 
Yhip,min(cm)* 3.37 —0.40 0.431 0.43 2.82 0.249 0.615 0.007 
eLLslap(cm) 2.45 0.13 0.370 3.43 0.22 0.047 0.377 0.059 
eLLstroke(cm)* 2.00 0.32 0.922 5.70 —0.12 0.007 0.938 <0.001 
Stride length(cm) 12.96 0.09 0.168 13.39 0.84 0.542 0.311 0.094 
Stride duration(s) 0.10 0.10 0.383 0.13 —0.04 0.003 0.388 0.055 
Dfstance*, 0.22 0.11 0.500 0.34 —0.31 0.203 0.665 0.004 
Dfsub*, 0.47 0.09 0.612 0.65 —0.18 0.107 0.713 0.004 
UX,slap (m s-10.20 0.04 0.002 0.22 0.03 0.000 0.002 0.900 
UX,stroke (m s-1)*, —0.02 0.74 0.424 —0.34 —1.01 0.068 0.472 0.028 
UY,slap (m s-1)*, —0.65 0.26 0.548 —1.53 —0.19 0.016 0.567 0.012 
UY,stroke(m s-1)*, —0.16 0.45 0.767 —0.77 —0.60 0.091 0.872 <0.001 
Knee extension(deg.)*, 34.21 0.24 0.567 83.69 —0.54 0.179 0.727 0.001 
Ankle extension (deg.) 30.17 0.24 0.184 85.83 —1.19 0.381 0.337 0.078 
θknee,ff(deg.)*, 137.37 —0.20 0.691 75.72 0.08 0.004 0.700 0.003 
θknee,es(deg.) 173.61 —0.06 0.311 144.88 —0.02 0.002 0.310 0.094 
θankle,ff (deg.) 109.59 —0.12 0.261 67.53 0.47 0.129 0.319 0.088 
θankle,es (deg.) 140.23 —0.01 0.005 145.91 —0.30 0.14 0.003 0.869 
% Slap 0.12 0.03 0.015 0.12 0.32 0.079 0.013 0.750 
%Stroke*, 0.11 0.18 0.320 0.22 —0.66 0.277 0.481 0.026 
% Recovery up 0.48 0.01 0.024 0.50 0.02 0.004 0.23 0.672 
% Recovery down*, 0.33 —0.19 0.389 0.16 0.60 0.122 0.466 0.030 

Dependent variables

p1

p2

r2mass

p3

p4

r2velocity

r2mass×velocity

P
ΔXknee(cm) 12.46 0.09 0.197 13.30 0.79 0.505 0.344 0.075 
ΔYknee(cm)* 2.09 0.27 0.842 4.96 —0.02 0.000 0.844 <0.001 
ΔZknee(cm)* 0.90 0.35 0.799 3.07 —0.42 0.073 0.887 <0.001 
ΔXankle(cm) 12.53 0.09 0.186 13.20 0.84 0.525 0.336 0.081 
ΔYankle(cm)* 2.13 0.29 0.955 5.39 —0.09 0.005 0.968 <0.001 
ΔZankle(cm)* 2.31 0.08 0.133 2.45 0.62 0.333 0.173 <0.001 
Yhip,ff (cm) 3.06 —0.24 0.227 0.87 1.88 0.281 0.349 0.072 
Yhip,min(cm)* 3.37 —0.40 0.431 0.43 2.82 0.249 0.615 0.007 
eLLslap(cm) 2.45 0.13 0.370 3.43 0.22 0.047 0.377 0.059 
eLLstroke(cm)* 2.00 0.32 0.922 5.70 —0.12 0.007 0.938 <0.001 
Stride length(cm) 12.96 0.09 0.168 13.39 0.84 0.542 0.311 0.094 
Stride duration(s) 0.10 0.10 0.383 0.13 —0.04 0.003 0.388 0.055 
Dfstance*, 0.22 0.11 0.500 0.34 —0.31 0.203 0.665 0.004 
Dfsub*, 0.47 0.09 0.612 0.65 —0.18 0.107 0.713 0.004 
UX,slap (m s-10.20 0.04 0.002 0.22 0.03 0.000 0.002 0.900 
UX,stroke (m s-1)*, —0.02 0.74 0.424 —0.34 —1.01 0.068 0.472 0.028 
UY,slap (m s-1)*, —0.65 0.26 0.548 —1.53 —0.19 0.016 0.567 0.012 
UY,stroke(m s-1)*, —0.16 0.45 0.767 —0.77 —0.60 0.091 0.872 <0.001 
Knee extension(deg.)*, 34.21 0.24 0.567 83.69 —0.54 0.179 0.727 0.001 
Ankle extension (deg.) 30.17 0.24 0.184 85.83 —1.19 0.381 0.337 0.078 
θknee,ff(deg.)*, 137.37 —0.20 0.691 75.72 0.08 0.004 0.700 0.003 
θknee,es(deg.) 173.61 —0.06 0.311 144.88 —0.02 0.002 0.310 0.094 
θankle,ff (deg.) 109.59 —0.12 0.261 67.53 0.47 0.129 0.319 0.088 
θankle,es (deg.) 140.23 —0.01 0.005 145.91 —0.30 0.14 0.003 0.869 
% Slap 0.12 0.03 0.015 0.12 0.32 0.079 0.013 0.750 
%Stroke*, 0.11 0.18 0.320 0.22 —0.66 0.277 0.481 0.026 
% Recovery up 0.48 0.01 0.024 0.50 0.02 0.004 0.23 0.672 
% Recovery down*, 0.33 —0.19 0.389 0.16 0.60 0.122 0.466 0.030 

Variables were fitted to the following two nonlinear, exponential functions: dep. var. = p1 ×(massp2) and dep. var. = p3× (velocityp4). Unknown parameters (p1, p2, p3 and p4) were determined by Gauss—Newton estimations.

Abbreviations are presented as described in the text and List of symbols:ff, footfall; es, end of stance.

P-values were determined with two-tailed t-tests

N=11, except Dfsub, which was N=10.

*

indicates significance of P<0.05

Indicates a significant simple linear regression of dependent variable against mass. All linear variables were adjusted by snout—vent length(SVL) and leg length (LL) (P<0.05)

Close Modal

or Create an Account

Close Modal
Close Modal