Figure 4 . Distribution of herring of different lengths in the Norwegian and Greenland 

 seas in July . Variations for different regions are presented in deviations 

 from the total length frequencies for the period of time between 1939 and 

 1954. (The overall number of the measured fishes - 72, 000 specimens). 

 1. - north from the 77th parallel; 2. - between 74°30' and 77° of north 

 latitude; 3. - between 73°00' and 74°30' of north latitude, east from 4° of 

 east longitude; 4. - between 71° and 73° of north latitude, east from 4° of 

 east longitude; 5. - south from 71 of north latitude; east from 4° of east 

 longitude; 6. - polar waters, to the north-west from the polar front, between 

 the Bank "600" and Jan Mayen Island; 7. - west from the meridian of Jan 

 Mayen Island; 8 . - the region adjacent from the south-east to the Bank "600"; 

 9. - the zone of Bank "774" and eastern slope of Iceland's shelf; 10. - western 

 half of Norwegian Sea between Helgoland Ridge and the polar front . 



In the western half of the Norwegian Sea in region 10, the herring 29-31 cm. in length pre- 

 vail . Large herring are particularly abundant beyond 76 north latitude . 



Analysis of the age composition of herring catches showed a similar picture. We observed 

 the greatest number of herring of older age groups north of 74 north latitude . In 1950, in the 

 northern zone of Spitsbergen current, there prevailed the herring 12-14 years of age, in 1951 - the 

 13-year-old herring. In 1952 and 1953, we obtained no samples characterizing the age composition 

 of the herring catch north of 74° north latitude . In 1954, the 10-12 -year-old herring prevailed in 

 the Spitsbergen region. 



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