White Sea herring (the Onega and Dvina stocks). 



4) The number of White Sea herring is greatly influenced by factors which determine the 

 development of the eggs and the survival of the young. 



In this connection, the, prohibition of the fishing of spawning herring is clearly not the only 

 means of increasing the stocks of White Sea herring. 



5) The aim of further research must be to establish the abiotic factors influencing the sur- 

 vival of the young, and to work out additional measures for the re -constitution of the White Sea 

 herring stocks . 



282 



