146 
Fishery Bulletin 117(3) 
Table 4 
Results from use of generalized linear models to explain variation in relative 
fecundity of adult northern rockfish ( Sebastes polyspinis) and light dusky rockfish 
( S. variabilis ) captured in May and December 2014 in the Gulf of Alaska. Param¬ 
eters include season, site (light dusky rockfish only), and fork length. Entries for 
the model that was determined to have the best fit to data for each species are 
italicized. Differences in Akaike information criterion (AAIC) between the best fit 
model and the other models for each species are given. 
Species 
Model 
Parameters 
P 
AAIC 
Northern rockfish 
1 
Season 
<0.001 
Fork length 
0.031 
2 
Season 
<0.001 
2.8 
3 
Fork length 
0.043 
48.7 
Light dusky rockfish 
1 
Season 
<0.001 
0.3 
Site 
0.206 
Fork length 
<0.001 
2 
Fork length 
<0.001 
Season 
<0.001 
3 
Season 
<0.001 
29.5 
to 
>, CD 
•tS >N 
1 8 
11 
"03 Q) 
=3 
§ ° 
g 
>, 
,8 
■ 700,000 
600,000 
500,000 
400.000 
300,000 
200,000 
^ 100,000 
u 
o 
O n 
May ° December 
360 380 400 420 440 460 480 500 520 540 
Fork length (mm) 
300 
_ 275 
. f 250 
£2 O 225 
E .IT 200 
§1 
150 
(D O 
> D) 125 
is 8 ioo 
75 
8 50 
25 
0 
B 
• May o December 
360 380 400 
420 440 460 480 
Fork length (mm) 
500 520 540 
CO 700,000 
t? ^ 600,000 
=> 9 
8 b 500 ' 00 ° 
ra | 400,000 
° 300,000 
CQ 
>, 200,000 
To 
^ 100,000 
o 
8 0 
May o December 
300 
3 275 
. w5 250 
£ b 225 
c n 200 
8 § 175 
4= ^ 150 
m o 
I O) 125 
'm 100 
75 
50 
25 
0 
<D 
OJ 
cc $ 
D 
May 
360 380 400 420 440 460 480 500 520 540 
Fork length (mm) 
December 
o 
♦ ♦ 
360 380 400 420 440 460 480 500 520 540 
Fork length (mm) 
Figure 4 
Relationships of potential annual fecundity, measured as number of developing oocytes or embryos, and of 
relative fecundity, calculated as potential annual fecundity divided by total weight, to fork length for (A and 
B) northern rockfish ( Sebastes polyspinis ) and (C and D) light dusky rockfish (S. variabilis ) collected during 
May and December 2014. Black circles and diamonds represent data for fish collected in May. Open circles 
and diamonds represent data for fish collected in December. 
