10 B. B. PARRISH 



to about 260,000 tons in the inter-war years, and to less than 150,000 tons in 

 the post-war years up to 1957. 



In Fig. 4 are given the landings and crude effort statistics of these two 

 fisheries respectively since 1924, the first year for which these effort data are 

 available. The units of effort used are the number of arrivals at port, which 



SCOTTISH FISHERY IN NORTH 



WESTERN NORTH SEA 



4aooo 



•35.000 



30.000 

 -25^000 

 20,000 



15.000 

 p 0,000 



5.000 



if) 



z 

 < 



q: 

 U 



u. 1.000. 

 O 



If) 900. 



O 



Z 800^ 

 < 



^ 700 



§ 600J 



z 



o 



-J 



UJ 300 



500 

 400 



O 



200. 

 100 



EAST ANGLIAN FISHERY 



25,000 ^^ 



o 



z 



Q 



po.ooo z 

 < 



J 5^000 



cr 

 ill 



CD 



J0,000 



5,000 



Z 



-J 

 < 



1922 '24 '26 '28 '30 '32 '34 '36 '38 1946 '48 'SO '52 '54 '56 '58 



YEAR 



Fig. 4.— Statistics of yield (in crans) and fishing effort (number of landings) for the British drift 

 net fisheries in the north-western North Sea and Southern Bight (East Angha) respectively 

 (1922-57). 



