Perrin et al.: Geographic variation in cranial morphology of Stenella attenuata 



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Figure 5 



Distance phenogram summarizing UPGMA clustering of 29 latitude-longi- 

 tude blocks based on 30 characters. Cophenetic correlation is 0.76. 



iting a significant regional pattern also showed lo- 

 cal patterning. 



Our tests showed strong regional and local pat- 

 terning for principal component I and canonical 

 variable 1, whereas principal component II has sig- 



nificant local patterning (Table 6). Mantel tests and 

 correlations confirm a point made earlier — that ca- 

 nonical variable 2 does not exhibit a systematic 

 geographic pattern. 



