RESULTS OF SALMON MARKING 71 
Other records exactly analogous to these have 
been obtained from the Tay marking. 
The next stage which has to be referred to is that 
of the small spring fish, the fish of the same age as 
the grilse kelt, but which has not entered fresh water 
as a grilse. This class of fish is well marked in the 
Helmsdale and Brora, from which a number of records 
are seen. It is also well marked in the Dee. Asa 
kelt it is usually 5 or 6 lb.in weight. A Brora fish 
marked 7303 is an example of short period migration, 
and another Brora fish, 6040, may be taken as show- 
ing the long period. The former returns in three and 
a half months asa clean fish of 9 1b., the latter returns 
in fourteen months as a clean fish of 16 lb. 
The records are :— 
SHortT PERIOD. 
303 eM Ib. 313” Kelt Fem, Apr. 16,1901 Loch Brora 
a ee 2) Clean Fem. Aug. 2,1901 River Brora 
Lone PERIOD. 
{ 6 1b. 27” Kelt Fem. Mar. 15,1901 Loch Brora 
6040116, 33” Clean Fem. May 15, 1902 Loch Brora 
This completes in a manner the grilse and its 
prototype the small spring fish, but it may be asked 
whether grilse kelts which are subsequently found 
as summer salmon continue to be annual spawners, 
or whether one fish may be at one time an annual 
breeder and at another a fish of long absence in 
the sea—a long period feeder. Two other Brora 
records which show remarkably small increase of 
weight in a two years’ interval seem to indicate that 
in both cases the greater part of the time between 
