Table 3.

PC loadings from a principal component analysis comparing raking kinematics in O. mykiss and S. jardinii

PC1 28%
PC2 20%
PC3 15%
PC4 13%
Kinematic variablesComponent loadings
Cranial elevation timing 0.860 0.140 –0.108 –0.055 
Hyoid distance timing 0.834 –0.247 0.012 0.006 
Pectoral girdle retraction timing 0.530 0.658 0.106 0.244 
Hyoid elevation amplitude 0.513 –0.185 0.618 0.264 
Pectoral girdle retraction amplitude –0.208 0.870 0.047 0.174 
Gape distance timing 0.256 0.362 –0.615 –0.205 
Cranial elevation amplitude –0.283 0.368 0.606 –0.247 
Gape distance amplitude 0.233 0.102 0.206 –0.872 
Univariate F-statistics (d.f.=1, 3) 6.353 11.123 21.051 3.614 
 P>0.05 P<0.05 P<0.01 P>0.05 
PC1 28%
PC2 20%
PC3 15%
PC4 13%
Kinematic variablesComponent loadings
Cranial elevation timing 0.860 0.140 –0.108 –0.055 
Hyoid distance timing 0.834 –0.247 0.012 0.006 
Pectoral girdle retraction timing 0.530 0.658 0.106 0.244 
Hyoid elevation amplitude 0.513 –0.185 0.618 0.264 
Pectoral girdle retraction amplitude –0.208 0.870 0.047 0.174 
Gape distance timing 0.256 0.362 –0.615 –0.205 
Cranial elevation amplitude –0.283 0.368 0.606 –0.247 
Gape distance amplitude 0.233 0.102 0.206 –0.872 
Univariate F-statistics (d.f.=1, 3) 6.353 11.123 21.051 3.614 
 P>0.05 P<0.05 P<0.01 P>0.05 

Individual variance was factored out using a mixed-model ANOVA. Bold PC loadings (values >0.6) are plotted as eigenvectors in Fig. 5 

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