Salmonidas of Norway. 85 



from about 2 to 6 lbs. ; but upon many rivers, especially 

 those running into the Nord fjord, they grow to an 

 immense size ; 1 lbs. is no uncommon weight, and each 

 season will reveal fish of this size up to 16 lbs., or even 

 more. 



The size and character of various rivers in Norway 

 combine to make them suitable for the requirements of sea- 

 trout or salmon, and frequently both species are found in 

 one river, yet it does not follow that they will thrive 

 equally well in a single water ; indeed, facts seem to 

 suggest the contrary. 



Rivers prolific in salmon of great weight are not always 

 remarkable for the size of the sea-trout, and those which 

 produce the largest sea-trout are not the most celebrated 

 for salmon of vast proportions ; hence it would appear that 

 although sea-trout can thrive fairly well in large salmon 

 rivers, the smaller ones would seem more favourable to 

 their existence and spawning operations. 



I have found sea-trout in the smaller rivers at the 

 commencement of June, but in the larger rivers I have 

 not noted their arrival until about three weeks later 

 than that of the salmon. 



The sea-trout appear to run up the rivers in schools 

 for a certain distance from the mouth, and then they 

 gradually separate and seek the tributaries, which they will 

 penetrate so far as the water will allow. 



