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826 <br />COPEIA, 1991, NO. 3 <br />TABLE 3. SUMMARY OF CHARACTER LOADINGS FOR PCA OF Ptychochellus grandis, P. oregonensis, AND P. umpquae. <br />Only loadings of magnitudes greater than 0.2 have been listed for eigenvectors 2 through 6. Eigenvector 1, <br />the size component, had no characters that loaded at greater than 0.2 magnitude. <br />Character <br />3. Occiput to pectoral insertion <br />4. Dorsal origin to pectoral insertion <br />10. Pelvic insertion to anal origin <br />13. Dorsal insertion to pelvic insertion <br />14. Dorsal insertion to anal origin <br />17. Anal insertion to dorsal insertion <br />20. Upper c.p.r.* base to lower c.p.r. base <br />22. Lower c.p.r. base to anal insertion <br />26. Pelvic fin length <br />30. lnterorbital width <br />37. Orbital width <br />38. Orbital height <br />39. Left supraorbital to left pectoral <br />insertion <br />41. Gape width <br />44. Maxilla to snout tip <br /> Eigenvectors <br />2 S 4 5 8 <br />-0.57141 0.43766 -0.26255 -0.215363 <br />0.45575 -0.44145 -0.24119 -0.22627 -0.29487 <br /> 0.27953 <br /> 0.51945 0.35760 <br /> -0.21938 <br /> 0.28139 <br /> -0.20827 0.27768 <br /> -0.31209 <br /> -0.23992 <br />0.34762 0.43923 <br /> -0.21223 <br /> -0.21387 0.20220 <br /> -0.34070 <br /> 0.41679 <br />0.21038 0.26479 <br />- Abbreviation: "c.p.r." - caudal principal ray. <br />and 3, both of which were four times greater <br />than the highest loading count and four times <br />greater than the first principal component (size). <br />Original measurements loading heavily into <br />principal component axes 2 and 3 included <br />characters that best distinguished these three <br />2 <br />» 1 <br />(!1 <br />X <br />Q <br />0 <br />a <br />L7 <br />76 <br />V <br />S`C C <br />species. Of those characters with high loadings <br />into components 2 and 3, interorbital width <br />(character 30) loaded most highly into both. <br />Inspection of the measurement proportions <br />(Table 2) revealed interorbital width/prepec- <br />toral length x 100 also differed strongly for the <br />9 ugh u g = p grandis <br />ul u t = p lacius <br />o <br />o = P. oregonensis <br />o u = p umpquoe (Umpqua) <br />m o o s =P. umpquoe (Siuslow) <br />° oo M = Mylophorodon conocepha/us <br />o ° H = Hesperoleucus symmelricus <br />it tt "` t <br />[I I <br />1 s M?II <br />t ttt; %5 5 5, <br />1 s 0M M H <br />t 4 MM HHH <br />1 s <br />M M HH <br />2 H <br />z <br />=3 -2 -1 0 s c <br />Canonical Variate Axis I <br />Fig. 2. Canonical variate analysis of 45 nonstandardized measures and six counts for all specimens. Ellipses <br />denote the 95% confidence interval of each sample. Specimens of five taxa can be arranged into respective <br />groups; specimens of P. umpquae fall into two groups: those from the Umpqua drainage (u) and those from <br />the Siuslaw drainage (s).