TAGGING SALMON IN ALASKA, 1923 
71 
at Unga Island were eastern representatives found, and these in such limited num- 
bers as possessed no practical significance. In 1923 there were tagged at Unga 
Island 3,432 red salmon. Only 20 of this number, as shown in Tables 30 and 31, 
were captured east of Unga, 11 being taken at Chignik, 1 at Karluk, 2 at Alitak, 
and 2 in Cook Inlet. 
On the basis of the 1923 experiments, we are justified in repeating that no 
appreciable draft will be made on the salmon supply of the Chignik and Karluk 
Rivers and Cook Inlet by fisheries located in the Shumagin Islands and in Morzhovoi 
and Ikatan Bays. The red-salmon fisheries of these localities are recruited largely 
from the streams that enter Bristol Bay, and they should be subjected to whatever 
restrictions are elsewhere found necessary to protect the Bristol Bay runs. 
OTHER SPECIES 
Although attention was focused on a study of the migration of the red salmon, 
624 dog and 199 humpback salmon were also tagged. A very few silver salmon 
were included, as well as two king salmon. Neither of the kings was reported 
and but four of the silvers. Two of these were tagged in Ikatan Bay on July 11 
and were recovered in the same place on the 13th. Two were tagged in Mor- 
zhovoi Bay on July 18, one of which was recovered in Ikatan Bay on the 24th and 
the other at Chignik on August 15. Data on the number of silver salmon tagged 
will be found in the list given on page 33. Since only 22 individuals in all were 
tagged, it is obvious that no reliable conclusions can be drawn. 
Humpback salmon . — On July 6 there were tagged 199 humpback salmon from 
the Big Valley trap on Unga Island. The results of this experiment are given 
in Table 18. None of these fish were taken elsewhere than in the traps near 
where they were released and in the local fisheries along the southern shore of the 
peninsula. Although the number tagged is small, it seems probable that the 
humpbacks are very largely, if not exclusively, of local origin. It is well known 
that many of the small streams of this region support large runs of humpbacks, 
so that these results are not at all surprising. The returns amount to 13 per cent 
of the number tagged, and of this 8.5 per cent were taken on Unga Island. It 
would not appear from this that the fishery for humpback salmon was particularly 
intensive during 1923, but the intensity of the fishing for this species varies greatly 
from year to year, depending to a considerable extent upon the success of the red- 
salmon fishery. It is not safe to conclude, therefore, that the humpback runs 
can withstand any great increase in the present intensity of fishing. 
Dog salmon . — Six hundred and twenty-four dog salmon were tagged in five 
different experiments. The returns are tabulated in detail in Tables 15, 17, 24, 
26, and 28, and the more essential data are collected in Table 42. In addition 
to those tabulated, two individuals were tagged in Morzhovoi Bay on July 20 and 
both were subsequently taken — one in Morzhovoi Bay on the 29th and the other 
in Ikatan Bay on the 24th. 
