The Salmon 



145 



(LI 

 ,0 



= 



-3 



introduction. During some seasons it is worse than in others, 

 and the colder the weather 

 the worse it becomes. 



In the year it was 

 first known it commenced 

 in the spring by attack- 

 ing spring fish. In the 

 autumn, again, its ravages 

 commenced in September, 

 and continued during the 

 whole winter, causing 

 the death of thousands of 

 fish. Since then the 

 autumn fish have become 

 affected later each year, 

 and this year (1907) very 

 little of the disease was 

 seen among the autumn 

 fish until December. 

 Winter, spring, and sum- 

 mer fish, however, are 

 more or less affected 

 throughout the whole year 

 when they enter the higher 

 reaches. This, I think, is 

 caused by the clean fish 

 entering the district 

 where the river is full of 

 old diseased fish. If so, 

 these spring fish infect 

 the summer fish, and these 

 latter the autumn ones, 

 and this goes on year after year. 



The falls of Tummel, Garry, Lochy, Dochart, and Lyon help 



19 



o 



