THE BARENTS SEA 



163 



Fig. 64. Chart of eastward migration of cod (Maslov). 1 



Wintering areas of immature cod ; 2 Migration of mature cod ; 



3 Migration of immature cod. 



The seasonal change of cod diet (according to V. Zatzepin and N. Petrova) 

 as a percentage of the index* of repletion is also given in Table 71. 



Cod eats most intensively at depths of 50 to 100 m ; lower down its food 

 consumption declines sharply. Since the eastern part of the Sea is its main 



Table 71. Autumn feeding of cod in eastern part {winter lull) 



* The index of repletion is the ratio of the contents of the intestines to the weight of 

 fish, expressed as 1/100 of the percentage (prodecimille). There is a difference between the 

 general index of repletion (for the whole contents of the intestines) and the particular in- 

 dices (for the separate component groups). 



