empty stomachs begins to increase. 



Figure 4. Quantity -welgtit analysis of the food of the Atlantic -Scandinavian herring during 

 the period 1951-54. For symbols see Figure 2 and Table 6. 



The presence of the summer plankton complex is still characteristic of July and August, but 

 the quantity of Calanus finmarchicus eaten by the herring is reduced in comparison with the quan- 

 tities eaten in May and June, and the quantities of Eujrfiausiacea, Amphipoda ( Themisto ) and Appen- 

 dicularia ( Qikopleura ) begin to Increase. 



The samples taken in August- -with the exception of the bulk of spring- spawning herring-- 

 were found to contain a small number of specimens of summer -spawning herring, with their gonads 



153 



