70 THE. AGE AND GKOWTH OF SALMON AND TKOUT. 



with this point it is remarkable, as was noticed before, that in the early 

 stages of the trout's life there is remarkable similarity in the rate of growth 

 in different localities, and that the differences only appear at a later period 

 of life. 



The fish in Sandvand, for instance, exhibited a typically altered mode 



0m. 

 70 



60 

 50 

 +0 

 30 

 20 

 10 



/ Z3*567d9/0 



~& iu n, 6 T* e . 



FIG. 30. Growth Diagram of Seven Trout from Gjeddevand. 



of growth of the kind described, as will be seen if we examine the figures 

 in Table XXXIVu. 



As a very instructive example I will mention seven trout I have 

 obtained from a little lake in Finmarken. 



Close by the river Luostijok, whose stock I have previously described, 

 lies a little moorland lake called " Gjeddevand." It is separated by a small 

 strip of land from the Luostijok, and its only source of supply is when the 

 river now and then overflows its banks, and some of the flood water enters 

 it by way of a shallow depression. The lake contains quantities of perch, 

 pike, and burbot (lota vulgaris). There are, in addition, considerable 

 numbers of very large trout, and so large that the Finns have to use salmon 

 nets for their capture. As no streams flow into this lake, and the bottom 

 is all mud, it is impossible for the trout to propagate there, so that the stock 



