20 
BULLETIN OF THE BUREAU OF FISHERIES 
fisheries, the number of recaptures is 317, or 45.2 per cent. Although this is still a 
higher percentage of recovery than has usually been reported from similar tagging 
experiments, it is within the range of the previous results. The recovery of so many 
tagged fish shows that the fishery is carried on with a considerable intensity in this 
district, and it can not be doubted that, were it not for the controlled escapement, 
the catch of Karluk red salmon would be greatly in excess of the 50 per cent required 
by law. 
It will be noted that over 40 per cent of the tagged salmon were not accounted 
for, in spite of the facts that the results show that a majority of the fish were bound 
for the Karluk River, and that the weir in the Karluk River gives opportunity to 
observe the fish that entered this stream. Without much doubt, this discrepancy is 
due to the fact that it is impossible to observe carefully all of the fish as they pass 
through the weir. They are usually moving rapidly and may be as much as 3 feet 
below the surface of the water. Under such conditions it is inevitable that tagged 
fish would pass through without being noted, and we believe that this accounts for 
a large part of the 40 per cent that was unaccounted for. 
The rate of travel indicated by the returns is fairly rapid, corresponding, in 
general, to the rate observed in the experiments on the Alaska Peninsula in 1922 and 
