in the direction of the increase in number of two-year -old fish and a decrease in the number of 

 older fish. 



80 



40 

 



SO 

 40 





 80 

 40 







so 



40 

 

 80 

 40 

 



80 

 40 

 

 80 



40 

 



80 



40 

 



80 



40 

 



80 

 40 





 80 

 40 







SO 



40 







so 



40 

 

 80 



40 

 



so 



40 



1323 



Xli 



t924 



(1 



1925 



n r-. n P 



1926 



1927 



1928 



1929 



1330 



mi 



1932 



m. 



1933 



1934 



1935 



nn^ 



n 



en 



40 







so 



40 







so 



40 

 

 80 



40 

 

 80 

 40 



_t 



40 





 80 

 40 







SO 

 40 





 80 

 40 

 



1336 



1937 



xm 



1938 



80 



40 





 80 



40 







so 



40 



n 



80 

 40 



2 345B7S3 



Age 



10 80 

 40 



xiH 



1933 



XI 



H 



n i~i r-. 



- n n „ 



-CL 



n n „ 



rL 



n 



n_ 



y r-i 



Jl 



^ r. n 



M 



rn i 



t9iO 



1341 



1942 



1343 



1944 



1945 



1946 



1947 



1348 



1949 



1350 



I35t 



1952 



1953 



rL^ EiL 



!954 



n n 



-Ct 



1955 



23456783 Ifl 



Age 



Age composition of the spawning population of small Kandalaksha 

 herring in the years 1923-1955. 



Thus in the summer of 1944 in this gulf, large-scale influxes of the young of the small Dvina 

 herring were observed everywhere, which indicated the size of the 1943 year class and gave reason 

 to expect an increased catch of this herring in 1945-46 when the aforesaid year class would be due 

 to be caught. In reality there was to be no increased catch, although the 1943 year class predom- 

 inated in the spring catches over two years and constituted, in the spring of 1945, 96% and, in the 

 spring of 1946, 98% of the spawning population. The maximum catch of herring was in 1944. The 

 catch in 1945 turned out to be much smaller, and the catch in 1946 the smallest. This state of 

 affairs in the fishery was caused by the premature catching of the 1943 year class at the age of 1+. 



A similar picture was presented by the 1948 year class, which was numerous in all parts 

 of the White Sea; one might have expected that its advent into the fisheries in 1951 would have re- 

 sulted in a notable catch increase. In the Kandalaksha and Onega gulfs, this is what happened; the 

 catches of herring in these gulfs in 1951 were the biggest for some years. On the other hand, in 



278 



