IMPOVERISHMENT OF THE GROUNDS 263 



hand, the average catch per trawler has, on the 

 whole, fallen, except for the years 1895 and 1896, 



SLID 

 <L00 

 190 



(80 

 170 

 t6o 

 i5o 

 140 

 ISO 

 12.0 

 iiq 

 100 

 90 

 80 

 70 

 60 

 50 

 40 



30 



THICK UNE-. total quantily of fish caughf ; numbers 

 represent hundreds of tons. 



THIN LINE: nunnfaersof steam trawlers. 



DOTTE.D LINE: average catch of fish ber year per 

 trawler; numbers refireserit tons 

 of fish caught. 



I890 I8pi 189a 1893 185+ I8p5 I896 1897 I898 I899 



Scottish Flat Fish Trawl Fisheries : Chart to show the Relation between the 

 Total Flat Fish caught and the Means of Capture. 



when the otter-trawl came to be generally used, 

 and, by its great superiority over the old beam- 



