Douglas et al : Geographic variation in cranial morphology of Stenella longirostns 



65 



Correlation 

 050 



1-00 



- 1 Sea Current (N . Winler) 



- 2 Sea Current {W . Winter) 



- 9 Oxygen Min Layer (Depth) 



- 6 Sea Surface Temp (Jan ) 



- 7 Sea Surlace Temp (July) 



- 8 Sea Surface Temp (Ann Var ) 

 -10 Surface Salinity 



-13 Surface Dissolved Oxygen 



- 4 Solar Insolation (Jan ) 



- 5 Solar Insolation (Annual) 



- 3 Water Depth 



-11 Thermocline Depth (Winler) 



-12 Thermocline Depth (Summer) 



Figure 9 



Clustering by UPGMA on absolute correlation values among environmental variables. 

 Cophenetic correlation of 0.75. 



