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Appendix A 



The values of the eight morphometric characters were 

 Hnearly combined to form a single value, a z-score, 

 which was used to classify an individual into a group 

 (Sokal and Rohlf 1969, Norusis 1979). The general for- 

 mula for a z-score is 



Z = ClXl + C2X2 + ... + CnXn + e 



where each C is the unstandardized canonical discrimi- 

 nant function coefficient for each character (Norusis 

 1979). 



The general formula used to adjust each measure- 

 ment was 



Rv = Vn - bo - b,*SL 



where Ry = adjusted measure, 

 Vn = original measure, 

 bo = intercept, 



bj = slope of the univariate covariance equa- 

 tion, with 

 SL = 242.5 (mean SL of original sample). 



