ALASKA FISHERY AND FUR-SEAL INDUSTRIES, 1920. 129 
Fisheries, and from June 8 to 13, in company with C. F. Townsend, 
inspector, Alaska Fisheries Service, the party proceeded by launch 
to the mouth of the river, arriving June 13 at the entrance to Kwiguk 
ya where was located the floating cannery of the Carlisle Pack- 
ing Co. 
From this date until August 1 attention was given to the fishing 
grounds located in the Kwikluak mouth of the river and in the off- 
shore district beyond this mouth, and to the principal channels of the 
delta which are closed to commercial fishing. From June 25 to July 
1 the party proceeded by launch from Kwiguk to Holy Cross and 
return, to inspect the fishing camps of the lower river during the 
height of the king-salmon run. From July 5 to 7 a trip was 
made by launch from Kwiguk to the middle mouth of the Yukon, 
traversing both the Kwikpak and the Kawanak Passes, returning by 
way of Old Fort Hamilton, and inspecting en route the run of 
salmon in these channels. From July 23 to 29 a trip was made 
by steamer from Kwiguk to St. Michael and return, passing through 
the Apoon mouth. During the fishing season in the delta careful 
scrutiny was given daily to the salmon runs, and scale data were 
secured from extensive series of the different species of salmon which 
comprise the run. 
From August 2 to 20 visits were made to fishing camps along the 
river from Kwiguk to Rampart, an approximate census secured of 
the amount of dried salmon, and fishermen interviewed concerning 
the runs of 1919 and 1920. Having proceeded by steamer from 
Rampart to Dawson, August 23 to 31, the return was made by 
launch from Dawson to Tanana, September 1 to 5, Visiting on the 
way the fishing camps of the upper river. This phase of the inquiry 
terminated at Fairbanks on September 11, after ascending the Ta- 
nana River by launch as far as Nenana. 
IMPORTANT SPECIES OF SALMON WITH DATA CONCERNING RUNS. 
All five of the species of salmon known on the Pacific coast of 
North America make their appearance at the mouth of the Yukon 
and ascend that stream for a greater or less distance. Two of these 
species, however, the humpback salmon and the red or sockeye 
salmon, are present in such limited numbers as to have no practical 
significance. The three other species, namely, coho or silver, king, 
and chum or dog salmon, have substantial runs in the Yukon River, 
the latter two being of real economic importance. 
RED OR SOCKEYE SALMON. 
During the entire fishing season of 1920 the Carlisle cannery 
secured only 5 cases of sockeye salmon, in the neighborhood of 60 
fish. As the majority of these were taken on the flats outside the 
mouth of the river, there might seem warrant to consider them as 
strays which had wandered from the Kuskokwim, or from some 
other stream to the southward which possesses a well-marked run 
of this species. In that case they might not even be entering the 
river, but playing about for a time in brackish water before finally 
resorting to their native streams for spawning purposes. In favor 
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