64 



Fishery Bulletin 90|l). 1992 



01 03 05 07 03 n 13 15 



Figure 8 



Geographic variation in (A) Postorbital W. and (B) canonical variable 1. Darkened part 

 of bar indicates value for particular block. 



has a high positive loading on component I, while that 

 for Sea Surface Temp. (Ann. Var.) is negative. Five 

 other variables have relatively high correlations with 

 this component (Table 6). The second environmental 



component has high values for 

 the two blocks adjacent to the 

 Hawaiian Islands (Fig. lOB), with 

 intermediate values in other 

 western blocks. Strong negative 

 projections on this component 

 are found for blocks along the 

 coast of South and Central 

 America just north of the Equa- 

 tor. The most substantial load- 

 ings on this component are for 

 the two thermocline variables 

 (Table 6), while Water Depth and 

 Surface Salinity also exhibit 

 relatively high positive projec- 

 tions for component II. Envi- 

 ronmental component III reflects 

 mainly Solar Insolation (Annual), 

 with Solar Insolation (Jan.) also 

 having a relatively high positive 

 loading (Table 6). The most 

 extreme negative projection for 

 component III is for the north- 

 ern block near the coast (i.e., 

 0812), with the highest positive 

 projects for blocks in the west- 

 central portion of the study area 

 (i.e., 0505 through 0509). In 

 general, other blocks have rela- 

 tively high projection values, 

 except for 0802 (which is some- 

 what lower). Other components 

 beyond the first three tended to 

 represent only single environ- 

 mental variables. 



Several of the environmental 

 measures showed few or no sta- 

 tistical associations with mor- 

 phological characters (and result- 

 ing principal components or 

 canonical variables), while others 

 exhibited significant covariation 

 (Table 7). The first environmen- 

 tal variable. Sea Current (N., 

 Winter), is not significantly cor- 

 related with any of the 30 mor- 

 phological measures. The other 

 character summarizing sea-cur- 

 rent information. Sea Current 

 (W, Winter), has a geographic 

 pattern showing relatively weak 

 statistical concordance with eight of the morpho- 

 logical characters. Toothrow lengths and three of the 

 four tooth counts are among those with significant 

 associations. 



