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Fishery Bulletin 98(4) 



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^ Unimak 



Kodiak 



+ = No Catch 



• = >0 - 0.02 



o =>0.02-0.10 



O =>0.10 



& ° 



^. 



1985 



No samples 



O 





1986 



No samples 



.1» -i' 





1987 



o <:t3.v 



9o^Ja« ?° 



1988 



. o 



165 162 159 156 153 



Figure 3 



The geographic distribution (ifaKc-O pollock density in 

 the western Gulf of Alaska. August-October. 1985-88. 

 Symbol size indicates the mortality-adjusted number of 

 fish/m '. The star I * i marks the major pollock spawning 

 area in Shelikof Strait. 



 Kodiak 

 ' Shumagin 



 Unimak 



Kod 

 Shu 



as=-1479 



220 



8 Aug 



240 



28 Aug 



260 



17 Sept 



280 



7 Oct 



Day of year 



Figure 4 



Age-0 pollock mean fork length per haul versus collection 

 date for each year sampled August-October, 1985-88, 

 Symbol type indicates region (see Fig. 1). Lines represent 

 the least-squares linear fit from the ANCOVA of Kodiak 

 and Shumagin data (slope=0.090; mtercepts, o^- and a^. 

 respectively, are given ) 



1986 were each significantly (P<0. 05) different from all other 

 years. The year-region interaction term was marginally not 

 .significant (Table 5). A noteworthy correspondence between 

 mean size and water temperatm-e is apparent in Table 2. 



Regional differences were due to a relative abundance of 

 large-size fish in the Kodiak region. These fish were on aver- 

 age about 0.5-1.0 cm larger than the fish from elsewhere 



