296 
Fishery Bulletin 11 6(3-4) 
5 10 15 20 25 30 35 40 45 50 
Greenstriped rockfish 
120 
100 
80 
60 
40 
< 
5 10 15 20 25 30 35 40 
Total length (cm) 
Figure 2 
Length-frequency distributions of 4 species of rockfish (Sebastes spp.) sampled in submers¬ 
ible surveys (S, dark gray bars) and the Northwest Fisheries Science Center West Coast 
Bottom Trawl Survey (T, checkered bars) conducted off central California (36-37°N latitude) 
during 2003-2009. The curved line represents the bottom-trawl selectivity function from the 
most recent stock assessment for each species (not available for vermilion rockfish, Sebastes 
miniatus). The solid and dashed vertical lines indicate the mean lengths from submersible 
and bottom-trawl surveys, respectively. 
Table 2 
Values for 10%, 50%, and 90% total length quantiles (cm) and results of a chi-square two- 
sample test in comparing length distributions of all individuals of 4 species of rockfish (Se¬ 
bastes spp.) from submersible surveys in untrawlable areas and trawl surveys conducted off 
central California (36-37°N latitude) during 2003-2009. Length data were estimated to the 
nearest 5 cm during submersible surveys and to the nearest 1 cm during trawl surveys. For 
the chi-square test, length data from trawl surveys were binned to 5-cm increments (bin as 
midpoint) to match the format of data from submersible surveys. 
Species 
Submersible 
10%, 50%, 90% 
length quantiles 
Trawl 
10%, 50%, 90% 
length quantiles 
Chi-square 
two-sample test 
Greenspotted rockfish 
10, 25, 35 
14, 26, 36 
88.311, df=9, P<0.001 
Greenstriped rockfish 
5, 20, 25 
17, 23, 29 
314.36, df=7, P<0.001 
Vermilion rockfish 
30, 45, 50 
42, 47, 52 
29.5, df=9, P<0.001 
Canary rockfish 
25, 40, 60 
37, 42, 50 
50.354, df=ll, P<0.001 
