92 THE LIFE OF THE SALMON 
lower reaches to some extent. Asa matter of fact, 
34 had moved up, 25 had dropped lower, and the 8 
remaining fish were found in the position in which 
they had been marked. Only 1 fish out of the 25 
which had dropped back was reported as having in the 
interval of thirty-eight days gained 4 lb. in weight, 
and one naturally hesitates to state that with so slight 
a change one has evidence of sea feeding and not 
rather of inaccurate weighing. All others of this 
series showed decreases from 0 to 2 lb. In the Tay 
24 clean marked fish (spring fish) have been recap- 
tured within short intervals. They were marked 
between Perth and the Linn of Campsie, about nine 
miles above Perth. Of this number 8 fish which 
had dropped back were diseased, with one exception, 
No. 9100. This fish was marked at the Linn, and 
recaptured in a quite healthy condition about 13 
miles farther down in the upper tidal waters of 
the estuary. ‘The interval was two months and ten 
days, and the fish was reported as having lost 5 lb. 
in weight (the greatest decrease recorded for a clean 
fish in fresh water—27 lb. to 22 1b.). In the interval 
a heavy flood of snow water had occurred. Two fish 
were found in the same position as before, and two 
had ascended between 30 and 40 miles, while others 
had made a less ascent. A few recent Dee recap- 
tures of clean fish show in every case an ascent, and 
in all but one instance an ascent to the top waters 
of the river. In these Scottish records there seems 
nothing to indicate any return to the sea, as has been 
shown by Mr. Holt to occur in Ireland. 
