Williams and Ralston: Distribution and co-occurrence of Sebastidae off California and Oregon 



853 



4 - 



0.2 - 



yelloweye , \ 



redstripe | 



^ 0.0 - 



E 

 Q 



-0.2 - 



-04 

 03 



0.2 - 



0.1 - 



S 0.0 



E 



-0.1 - 



-0.2 - 



-0.3 



^ yellowtail 



^?n5%reenstriped 



[cowcod/ 

 widow 



0.2 



0.4 



Dimension 1 



Figure 12 



First three dimensions from a multidimensional scaling analysis of 26 rockfishes (center of names correspond to 

 point estimates except for labeled points) from the AFSC triennial bottom trawl survey. Clusters suggested by a 

 ^■medians (with ^=8) partitioning analysis are indicated by the enclosing lines (see text). 



The dividing line between the assemblages based on 

 depth and latitude was determined by visual examina- 

 tion of the distributions in Figures 6-10. The separation 



between shelf and slope species is roughly at 200-250 m; 

 very few slope species were captured at depths less than 

 200 m. Most of the shelf species did not occur below 250 m. 



