The Salmon 



107 



doubt, the difference is due to the interval that occurs between the 

 parr stage and the time the smolt goes to the sea. I have found the 

 same difference to exist in the parr and smolts of the Tay. In my 

 opinion, the large fish of the Aaro are of the same age as our spring 

 fish in the Tay, which average 22 Ibs., the difference being due to the 

 fish of the former having four months' longer feeding in the sea. Out 





V 1 s J "f 



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FIG. 110. 22-lb. Female. Norway, gth June 1910. 



of forty-eight scales examined, I found thirty-eight to have an average 

 of eighty-four lines on them, the remaining ten having over one 

 hundred lines, showing they had been up on a previous occasion. 

 Apparently no run of small spring fish takes place in this river. The 

 larger fish make their appearance towards the end of May, followed 

 by a run of smaller fish, averaging about 16 Ibs., early in July, and in 

 August by a few grilse and sea-trout. 



The scale taken from the fish, Fig. no, has eighty-four lines on 



