578 



Fishery Bulletin 103(4) 



Biomass decrease 

 with temperature 



. I8tm 176^ 172-W I68"W <U"W I60°W 



A 47 



Biomass increase 

 with temperature 



B 



D 



14 



110 

 I 



A2 A4 A5 



IB 



112 13 



I I I 



B1 B4 B6 B7 



32 



17 



I 



64°N 01 C5 



 5B°N 15 16 



II. 



D1 D5 D6 



15 



I. 



E1 E3 



172°W 168"W 164°W 160°W 



Clusters: 



Slope < - 0.3 (biomass decreases 

 with temperature) 



Slope > 0.3 (biomass increases with 

 temperature) 



Columns: 



I Predicted % of total biomass in the 

 area during warmest year 



1 Predicted % of total biomass in the 

 area during coldest year 



Standard error bar 



Figure 3 



Clusters of positive and negative slopes of the linear regression of pollock IT. chalcogramma) density (detected 

 by bottom trawl survey) when plotted against temperature. Columns represent predicted percent biomass of 

 fish in these clusters within the observed range of temperatures. Predicted percent of biomass is shown only 

 for clusters with the strongest relationship between temperature and fish density. 



