40 - 



3 

 < 

 Z 



w 30 



a 



3 



■B 



< 



20 - 



co 

 5 



3 

 Z 



10 - 



1 1 1 1 r 



1963 1964 1965 1966 1967 1968 1969 



Figure 11. Decline in population of young halibut in Bering Sea shown by 

 catch per haul of research trawlers. 



a 



a 



z 



o 



8 10 12 



AGE 



14 



8 10 12 



AGE 



14 



Figure 12. Growth rate of female halibut for (Left): the same grounds in different years, 

 (Right): different grounds within the same year. 



