lb — 



followed a little later by a similar increase in area XXIII off Aberdeen, and by a well 

 marked maximum in March in area XXIX immediately to the south thereof. In the 

 neighbourhood of the Fisher Bank there is a well-marked maximum in spring about 



1901 



1902 



1905 



1904- 



1905 



1906 



eo 



10 



Î 



I; 



i 



I 



■i^- 



i 



% 



t 



^; 



r. 



hll: 



■s^ 



Fig. 22. Codlincr. Area XVIII. 



February and March, which is perhaps to be correlated with a maximum which is shown 

 by Professor Henking to occur in the Skagerrack about November or December. In the 

 southern North Sea the maximum is in general in winter and early spring (Henking). 



An opposite condition to that of the north-west coast is found 

 in Shetland, where the Cod fishing is at its best about the 

 month of June. In the other northern areas we have eveiy- 

 where evidence of a maximum in summer and early autumn. 

 This summer influx of Cod is shared in by the line fishers 

 from Wick: its influence is apparent together with that of the 

 winter maximum at Orkney (area XIII), and it appears in August 

 as far south as Aberdeen, where it is present together with the 

 spring maximum of March, which is the one characteristic of 

 the East Coast in general. In the Skagerrack there is also a 

 double maximum, the chief being in summer, and in this 

 neighbourhood, therefore, we have something comparable to the 

 conditions found between Shetland and the north-west of 

 Scotland. 



We may say in brief that a winter maximum is found, 

 firstly off the north-west of Scotland, and secondly in the 

 Skagerrack; very probably also in the régions further north than 

 Shetland. A spring maximum is characteristic of the West Coast 

 of Scotland, the Irish Sea, the East Coast of Scotland, the 

 Fisher Bank region, and the southern North Sea; in fact of the North Sea to the south 

 of a curved line running from the Orkneys to the Skagerrack. Northward of that line 

 the maximum appears in summer and autumn. 



Fig. 23. Average Catch of 

 Cod, small-line boats at 

 Helmsdale (Moray Firth), 

 1904 — 06, incwts. pertiefs. 



