Orr and Hawkins: Species of the rougheye rockfish complex 
115 
specimen with an unknown genotype, a possible 
hybrid, was also included. 
Although meristic characters broadly over- 
lapped in ranges, several characters were in- 
dicative of a species-level difference between S. 
aleutianus and S. melanostictus. Numbers of gill 
rakers, lateral-line pores, and dorsal-fin rays dif- 
fered significantly (Tables 1 and 2). No regional 
or clinal differences were evident in frequency 
data (Tables 4 and 5). Significant differences 
were also expressed in the meristic PCA 
as heavy loadings on PCI (Table 6), which, 
however, revealed only a slight separation 
between broadly overlapping clusters of the two 
species when scores were plotted for PCI and 
PC2 (Fig. 6B). 
Plotting the scores of PCI of the meristic anal- 
ysis versus PC2 of the morphometric analysis 
resulted in slightly better resolution between the 
two species clusters (Fig. 60. In contrast with 
the morphometrics-only plot that had 16 indi- 
viduals in the area of overlap and the meristics- 
only plot in which the clusters nearly completely 
overlapped, only nine individuals were found in 
the area of overlap when the morphometric PC2 
was plotted against the meristic PCI. As in the 
morphometrics-only plot, six of these individuals 
were genetically identified. 
Figure 2 
Underwater photo of Sebastes aleutianus (rougheye rockfish) 
taken south of Kodiak Island, Alaska, ca. 56°N, 153°N, July 
2005. Photo by D. Hanselman. 
