ON TEOUT. 



69 



different localities, and I have for the 

 same reason added the calculated 

 values for Chaigijok and Sandvand. 



These values show us that the 

 growth of the trout in the first three 

 or four years of its existence agrees 

 pretty closely in the many different 

 localities. It would appear that it is 

 in the succeeding, periods of its life 

 that a wider difference occurs. For 

 instance, if we look at the values of 

 fish that are six, seven, and eight 

 years old we notice how great is the 

 discrepancy in their growth. And 

 this is even greater when we consider 

 the difference in weight relatively to 

 the difference in length.* 



As regards the rate of growth, 

 we find precisely the same conditions 

 ruling that we found in the case of 

 Mj0sen trout. All the fish, whose 

 scales indicate a high age, had grown 

 continuously throughout the whole of 

 their lives. 



The trout of these inland lakes 

 also furnish examples of the same 

 peculiarity that we found in the case 

 of salmon, sea trout, and Mj0sen 

 trout, namely, that after a period of 

 youth, with relatively slow growth, 

 the fish enters into a later period 

 with far better growth. In connection 



* In Table XXXVIII., I have given an 

 analysis which enables the reader to find the 

 average weight of each trout of given 

 length. The analysis is based upon the 

 average of a large series of weights and 

 measurements of trout from different locali- 

 ties. There is probably some local variation 

 in the relation between length and weight, 

 and the analysis cannot therefore claim 

 absolute accuracy for each locality, but it is 

 merely meant to serve as a general guide. 



