distinguishing them from the herring of the continental shelf. The mixed composition of their 

 spawning population enables us to assume that the dimensions of their school vary insignificantly. 

 The reproductive capacity of Atlantic -Scandinavian herring is relatively stable, since several 

 different age groups participate in reproduction. 



Figure 11. Fecundity of sea herring by age and size: southern Maritimes - after Ambroz 

 (1931); eastern Kamtchatka - after Panin (1950); region of Iceland, summer 

 race - after Lyamkin (1955); Norwegian Sea, ocean herring - on the basis of 

 data of the Polar Institute; Chesha Bay - on the basis of data of the Polar Insti- 

 tute; Tonnay Lake - after Probatov and Frolov (1951). Kandalaksha Bay - after 

 Vilson; Onega Bay - after Dmitriev (1946); Vistula Bay, spring sprat (salaka) 

 - after Seletskaya (1952); Viborg Bay, spring sprat (salaka) - after Vilson. 



55 



