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tions where the SmallPollock and LgPollock co-occurred 
(Overlap = l) ranged from 0.54 to 0.86, and there was 
no temporal trend; minimum values occurred in 1985, 
1987, 1989, and 2003 and peak values occurred in 1988 
and 1996 (Fig. 2). 
Pollock abundance models 
Of the four covariates examined ( TempDepth , Location , 
Year , and ColdPool), TempDepth and Location were both 
significant predictors of large pollock CPUE ( LgPollock ), 
small pollock CPUE (SmallPollock), and Overlap. In 
addition, Year and ColdPool were significant predictors 
of LgPollock , Year was a significant predictor of Small- 
Pollock, but neither Year nor ColdPool were significant 
predictors of Overlap. Significant covariates explained 
51.0%, 22.2%, and 17.1% of the deviance in models for 
LgPollock, SmallPollock, and Overlap, respectively (Table 
1). Over the years examined, LgPollock and SmallPollock 
decreased significantly (Table 1, Fig. 2). LgPollock was 
highest in the northwest, outer, and middle domains 
of the EBS and was lowest in the east EBS and in 
the coastal domain (Fig. 3). Large pollock tended to 
avoid the cold pool and LgPollock was highest in bottom 
temperatures greater than 1°C with bottom depths of 
75-150 m (Fig. 3). Small pollock were found primarily 
in the middle and outer domains of the northwest EBS, 
but had a broader distribution than large pollock (Fig. 
3). Small pollock ( SmallPollock ) were found at slightly 
shallower bottom depths (50-125 m) than large pollock, 
but there was considerable overlap in SmallPollock and 
LgPollock bottom depth ranges (Fig. 3). Small pollock 
were found in a wider range of bottom temperatures 
than the range found for large pollock. SmallPollock 
was high at temperatures between -1°C to 5°C (Fig. 3). 
Overlap was, as expected from LgPollock and SmallPol- 
lock trends, highest in the middle and outer domains of 
the northwest EBS, at bottom depths less than 100 m, 
with bottom temperatures between 0°C and 5°C (Fig. 3). 
Pollock diet 
Pollock sampled in the EBS during 1982-2006 consumed 
primarily euphausiids and copepods (Fig. 4). Other 
important prey included amphipods, chaetognaths, 
crabs, and pollock (Fig. 4). Miscellaneous prey items 
included other fish, larvaceans, mysids, shrimp, and 
other prey (Fig. 4). The %BW of prey pollock (60-200 
mm SL) consumed decreased during the time period 
examined (Fig. 4). Prey pollock 60-200 mm SL were 
the dominant-size pollock consumed by predator pollock 
measuring >19 cm FL (Fig. 5). Prey pollock >200 mm 
