A STUDY ON TROUT AND YOUNG SALMON. 



331 



These figures and their curves are in many respects 

 instructive. 



If we look at fig. 3 we will immediately observe that the 

 yield from our salmon-fisheries during the whole of the period has 

 been constantly increasing, yea, that their yield has even more 

 than doubled itsself since 1880. The curve representing the 

 catch from the rivers presents after a rise in the first of the 

 eighties a nearly even course, oscillating about the same figure, 

 while the curve representing the sea presents the same course 

 as the curve of the total catches. 



/880 



/88/ 



/33Z 



\(o I? 1^ \9 \I0 I// l/i \/3 \/f \/ö \/(o 



/33d 



im 



/33a 



7m 



im> 





/89/ 



/39^ 



/593 



/89^ 



/_89l 

 /396 



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Fig. 7. 

 Curve representing the number of bag-nets in Fosen, Strinden and Selbu, 

 Stjör- and Værdalen besides Inderöen in the years 1880—1898 (in hundreds). 



When we view the main arguments generally propounded 

 by those having river-interests, the course of these curves is 

 must greatly surprise us. Supposing the fact which is asserted 

 by those having river interests to be true, that the sea-fisheries 

 have developed and exist at the expense of the river-fisheries, 

 the curve representing the catch in the rivers must needs have 



