474 



Fishery Bulletin 104(3) 



1999 



No survey 



No catch 



15 25 5 45 55 65 



2000 



25 5 * 55 65 5 



Total length (mm) 



2001 



Figure 7 



Total length-frequency distribution for walleye pollock iTheragra chalcogramma) from four regions off the 

 Pacific coast of northern Japan in 1999-2001. Low G=low-growth group (solid barsi; high G = high-growth 

 group (open bars). 



1999 



No catch 



Dec. Jan, Feb Mar Apr 



Mar Apr 



2001 



Dec Jan Feb, Mar, Apr, 



Hatching date 



Figure 8 



Hatching date composition for walleye pollock (Theragra chalcogramma) from four regions off the Pacific 

 coast of northern Japan in 1999-2001. Low G=low-growth group (solid bars), high G = high-growth group 

 (open bars). 



