years the herring may spawn in Greenland waters and the young may grow up here. 



Figure 12. Plan of life-cycle of Iceland summer herring. 1. Drift of young to western 

 shores of Iceland and settling in bays and fjords . 2 . Spread of small and fat 

 herrings. Departure from coastal zone as they grow up. 3. Spawning migra- 

 tion of the "recruits". 4. Fattening and spawning migrations of young sexu- 

 ally mature fish . 5 . Fattening migration of older stages to northern shores 

 at beginning of summer. 6. Spawning migration of older stages to southern 

 shores in July- August. 7. Fattening migration of older stages to northern 

 shores at end of summer . 8 . Departure of older stages for winter . 



Conclusions 



1 . The summer spawning herring of the Iceland region are undoubtedly more numerous 

 than the Icelandic investigators imagine. The reason for this underestimation is that the Icelanders 



198 



