516 



Fishery Bulletin 102(3) 



25 - 

 20 

 15 

 10 -\ 



5 







Winter 1998 

 n s = 5 

 n = 8 



25 



20 

 15 

 10 



5 







102030405060 7080 



25 - 

 20 - 

 15 - 

 10 

 5 

 



Summer 1998 (rookey) 

 n, = 81 

 n„ = 226 



1020304050607080 



Winter 1999 

 n s = 24 

 n =46 



Winter 2000 

 n s = 40 

 n =96 



1020304050607080 



1020304050607080 



Summer 2000 (rookery) 

 n s = 24 

 a, = 81 



1020304050607080 



1020304050607080 



1020304050607080 



Estimated fork length (cm) 



Figure 3 



Relative frequency histograms of the estimated fork length of walleye pollock consumed by Steller sea lions 

 across seasons and years for rookeries and haul-outs. Fork lengths are predicted from corrected cranial struc- 

 tures in good and fair condition. Sample sizes for cranial elements in e l and scats (ra ) are provided. All winter 

 sites are considered haul-out sites. 



Winter 1999 

 n s = 48 

 n =218 



10 20 30 40 50 



Summer 1998 

 _ n s = 201 

 n e = 965 



10 20 30 40 50 



Summer 1999 

 n s = 44 

 n =193 



10 20 30 40 50 



Summer 2000 

 n, = 35 

 n . = 142 J 



10 20 30 40 50 



10 20 30 40 50 

 Estimated fork length (cm) 



10 20 30 40 50 



Figure 4 



Relative frequency histograms of the estimated fork length of Atka mackerel of 

 consumed by Steller sea lions by season and year. Fork lengths are predicted from 

 corrected cranial structures in good and fair condition. Sample sizes for cranial 

 elements (n e ) and scats (n s ) are provided. All summer sites are rookeries and winter 

 sites are haul-out sites. 



