TABLE 4. NUMBER OF SPAWNING MARKS AND AGE AT WHICH SEXUAL MATURITY 

 OCCURRED IN HERRING OF DIFFERENT AGES. (After L. A. Bakunenko 

 and M . M . Vykhrystluk) . 



Herring 26-28 cm. in length, though rarely found in the Bear-Spitsbergen region, were often 

 caught in commercial quantities during the exploration of southern regions . 



The largest concentrations of herring feeding after the first spawning, were found near Mohn's 

 Threshold and in the eastern half of the Norwegian Sea . 



After the nimierous investigations had been completed, the distribution pattern of herring of 

 different lengths in the Norwegian and Greenland seas became evident . The pattern is shown in 

 Figure 4 for July, when all the age groups of adult herring are particularly far away from the 

 spawning grounds . 



Mass measurements of herring that were carried out from 1939 to 1954 served as a basis for 

 the clarification of the above patterns . The overall number of measured fish amount to 72, 000 

 specimens . 



In Figure 4, we presented for each of ten large regions the herring length frequencies com- 

 pared to the total length frequencies for all the regions V. 



We observed the greatest number of young fish and lack of adult herring in the eastern half 

 of the Norwegian Sea - i.e. in region 5. Regions 4 and 8, in the vicinity of Mohn's Threshold, are 

 characterized by a scarcity of large herring and excess of young specimens . In region 9 near the 

 Jan Mayen, we observed a certain surplus of the largest herring 32 cm . and more in length, and a 

 certain shortage of fish 29-31 cm. in length. 



1/ The total length frequencies for ail the regions and individual length frequencies for different 

 regions have been reduced to a thousand . 



32 



