Aberdeen Fishery Statistics. 13 



the owners and captains, full information as to the place of fishing 

 and the number of liours spent in actual trawling. It is on this 

 information that the Board depends for its knowledge of the variations 

 in the average catch on each particular area from season to season 

 and from year to year. 



In the year 19l;> the Board received such information from 10,388 

 voyages, or over 8G per cent, of the whole, leaving 1698 voyages 

 whose place of fishing is only approximately ascertained, and for 

 which the time spent in fishing is unknown. But out of these 10,388 

 voyages, in 1521 cases the vessel fished on more areas than one in 

 the North Sea, and in 219 cases the vessel fished both within and 

 without the North Sea. There are left, accordingly, 8648 voyages 

 (or about 83 per cent, of all those included in the Board's general 

 statistics) which yield us full information as to the catch per unit of 

 time on some one particular ground. Accordingly, for these 8648 

 vessels the detailed Tables give the following information : — 



5. For each area into which the North Sea and the waters 



adjacent to om- Western coasts are divided for statistical 

 pm-poses (areas covering one degree of latitude and two 

 degrees of longitude) there are shown (a) the total number 

 of vessels known to have fished in that area, month by 

 month ; (6) the number of days during which they were 

 absent from port ; (c) the number of hours actually 

 spent in trawling. 



6. The total catches of these vessels have not been printed in 



full, as was done in former years ; but, reducing these 

 data to averages, there is shown, as formerly, for each 

 month and for each area (a) the average catch, per 100 

 hom-s' fishing, of each kind and class of fish, and (6) the 

 average earnings for the same unit of time. 



7. Lastly, there is shown for each area, the mean monthly 



percentage of cod in the total catch of cod and codling, 

 and of small haddock and small plaice in the total catch 

 of those fishes. 



Dealing firstly with the main body of statistics, there is shown, 

 briefly, in the following Table (I.), the total quantities of trawled 

 fish landed in 1913 by Aberdeen trawlers from the principal fishing- 

 grounds. 



[Table. 



