The Salmon 
103 
happened to the fry, with the result that the numbers of smolts and 
parr were greatly reduced. 
than usual, consequently a 
greater proportion became 
smolts the first year, many 
Of them beme eight times 
the weight of those that re- 
mained parr. Fig. 108 shows 
two of the same age—the one 
8 oz., and the other 1 oz. The 
larger one became a smolt when 
one year old, and the smaller 
was just assuming the smolt 
stage when two years old. The 
larger one, too, had a greater 
number of rings on its scales 
than the other. If these smolts 
are prevented from going to 
the sea, they develop ova and 
spawn on one or two occa- 
sions, but their growth is 
greatly retarded. A_ smolt 
thus imprisoned usually weighs 
ate the end of sthe frst year 
from 6 to 10 oz.; at the end 
of the second, from 10 to 18 
OA) alle: atetthe: end ols the 
third year, tromesS.to 32.07 
A smolt four years old can thus 
be 2 lbs. in weight if it has 
remained all its time in fresh 

Those remaining had more feeding 
September 1905. 
6-oz, Smolt, confined in Bertha Loch six months after becoming a smolt. 
106. 
EG 
water. (See illustrations of smolts at different ages and of different 
weights.) Smolts so confined become very restless, moving rapidly 
through the water and leaping high into the air. 
Several I had con- 
