38 
BULLETIN OF THE BUREAU OF FISHERIES 
In view of the returns from the Duckabush River and Snake Creek marking 
experiments, it is doubtful if the adult pink salmon often stray into streams other 
than those in the close proximity of their parent stream. The Dungeness River is 
approximately 60 miles distant from the Duckabush River, and in the examination 
of the 40,000 pink salmon at the Dungeness hatchery no salmon were found that 
could be considered as originating in the Duckabush River. Anan Creek is approxi- 
mately 25 miles from Snake Creek in Olive Cove and during the examination of 
the 13,965 trap-caught salmon at Anan no pink salmon were found that could be 
said to have originated in Snake Creek. In fact no pink salmon were found in any 
of the streams in the vicinity of Olive Cove that could be said to have come from 
the Snake Creek marked fry. 
It is not improbable that the 22 adipose marked pink salmon picked up by the 
commercial fishermen in Massett Inlet were of McClinton Creek origin. However 
for Pritchard to assume that all the salmon with adipose fin scars recovered in the 
other localities were likewise of McClinton Creek origin is to make an assumption 
too broad to remain within the realm of probability. 
SUMMARY 
In the spring of 1930, 36,000 pink-salmon fry were marked at the Duckabush 
River hatchery, Washington, by the removal of both their dorsal and adipose fins. 
These fry were hatched artificially from the spawn of 1929. In the summer and fall 
of 1931, 3,800 pink salmon returned to the Duckabush River, 8 of which were found 
to have both their dorsal and adipose fins missing. The Dosewallips River is located 
4 miles north of the Duckabush River, and the Hamma Hamma River is located 9 
miles south of the Duckabush River. One pink salmon with both its dorsal and adi- 
pose fins missing was found in each of these streams. Since the pink-salmon run in 
these streams occurs only on alternate years no run appeared in the summer and fall 
of 1932. 
In the spring of 1931, 50,000 pink-salmon fry were marked in Snake Creek at 
Olive Cove, Alaska, by the removal of their dorsal and adipose fins. These fry 
hatched in the stream under natural conditions and came from the spawn of 1930. 
In the summer and fall of 1932, 18,584 pink salmon returned to Snake Creek, 54 of 
which had both their dorsal and adipose fins missing. The nearest pink-salmon 
stream in the vicinity of Snake Creek is Thoms Place, a small stream about 10 miles 
south of Snake Creek. The pink-salmon run in this stream, however, does not 
occur until the run in Snake Creek is practically completed. The other pink-salmon 
streams in the vicinity are all more than 20 miles distant from Snake Creek. No 
pink salmon with both their dorsal and adipose fins missing were found in any of the 
streams in the vicinity. 
In view of the returns from these marking experiments is conceivable that the 
extent to which the pink salmon return to their parent streams to spawn may be 
dependent upon the proximity of other pink-salmon streams in the vicinity. That 
is to say, that the pink salmon composing the runs in streams that are more or less 
isolated from other pink-salmon streams may show very little or no tendency toward 
straying, whereas the pink salmon in streams flowing into bays and in close proximity 
to other pink-salmon streams may stray more or less into the neighboring streams. 
The marked pink salmon that have thus far returned from these marking experi- 
ments have all returned at 2 years of age. Their age at maturity, as determined by 
