368 
Fishery Bulletin 1 10(3) 
Bering 
Aleutian 
70 
65 
60 
55 
50 
45 
/ VB model fitted to 1981-83 
bias-corrected data, r?=515 
VB model fitted to 1996-2004 
bias-corrected data, n=4899 
. 1 ! ! 1 1 
0 5 10 15 20 25 30 
Age 
Figure 3 
Comparison by management region of male sablefish ( Anoplopoma fimbria) 
von Bertalanffy (VB) growth curves fitted to bias-corrected age-length data 
from the period 1981-93 (shown as a dotted line) and fitted to age-length 
data from the period 1996-2004 (shown as a solid line). Sample sizes (n) 
contributing to the VB analysis are listed in Table 1. 
Table 5 
Comparison of 2 age-weight models used for analyses of regional effects on growth of male sablefish (Anoplopoma fimbria) in 
Alaska. The most reasonable model, indicated with an asterisk (*), is the reduced model with a residual sum of squares (RSS) not 
significantly greater than the RSS for the full model. n = the number of observations, and ^ 2 =the chi-squared value. 
Model 
RSS 
f 
P 
No. of parameters 
n 
Data split into 6 regions* 
144.4 
24 
All data pooled 
151.8 
174.6 
<0.001 
4 
2614 
Maximum average weights among male sablefish var- 
ied slightly, but still significantly (P<0.05), by region 
(Table 7). The lightest males, with maximum weight 
of 3.0 kg, were found in the Kodiak region, and the 
heaviest males, with maximum weight of 3.4 kg, were 
observed in the EBS region. Females showed a larger 
range of average maximum weights, from 4.7 kg in the 
EBS region to 5.8 kg in the Shumagin region (Table 
8). Several maximum weights differed significantly 
between regions for both sexes; similar age-weight rela- 
tionships were seen only for females in the AI and Shu- 
magin regions and the Kodiak and Southeast regions. 
