The Salmon 76 
for a fish of the same age, caught on 18th July and weighing 185 lbs., 
may be 27 lbs. in August ; and a winter fish may be only 15 lbs. in 
October, and yet be 30 lbs. or more by March. It is quite easy to 
distinguish a small spring fish kelt from a grilse kelt by the increased 




Fic. 72.—Marked as Smolt May 1905. Caught 18th July 1907, 18% lbs. 
number of rings on the scale, and also by its having two contractions 
on the scale instead of one. 
The next run of fish is the winter run, and it begins on the Tay 
‘1 October and continues till the end of March. The fish in this run 
are all clean, and do not spawn until the next autumn; and not having 
been in the river before, they do not show a river-mark. There are 
seventy-three lines on the scales on 28th October, and by the end of 
March there are eighty. The scales, too, have three contractions, 
