120 
BULLETIN OF THE BUREAU OF FISHERIES 
Other fish entering Icy Strait turn north on reaching Chatham Strait, traverse 
Lynn Canal, and in all probability find their spawning grounds in the Chilkat and 
Chilkoot Rivers at the head of the Canal. These rivers are noted for their red-salmon 
runs and probably are the two most important salmon streams in the northern part 
of southeastern Alaska. It is not surprising, therefore, that a migration to this 
region is indicated. Only one tagged fish was taken outside of Icy Strait or one or the 
other of these two main lines of migration. That was reported from Ground Hog 
Bay, near Juneau. 
COHOES 
A total of 133 cohoes was tagged in Icy Strait during 1925. Only 15 (11.3 per 
cent), representing only four experiments, were returned. The data are presented 
in Table 3. 
Table 3. — Returns from coho salmon tagged in Icy Strait in 1925 
Locality and date of tagging 
Locality of recapture 
Pleasant Island 
Inian Island, 
Eagle Point, 
Total 
num b er 
returned 
June 23 
June 24 
June 25 
July 1 
Number 
Time 
Number 
Time 
Number 
Time 
Number 
Time 
Icy Strait: 
1 
57 
1 
2 
0-7 
1 
0-5 
3 
1 
6 
i 
1 
11 
i 
1 
3 
i 
Chatham Strait: 
1 
4 
i 
1 
42 
1 
(?) 
2 
1 
30 
1 
1 
57 
1 
1 
it 
1 
1 
32 
1 
1 
22 
1 
Total 
9 
5 
5 
3 
15 
28.8 
17.2 
7.8 
30 
1 See footnote 1 in Table 2 (p. 119). 
The returns are too meager to show details of the migration from Icy Strait, 
but they indicate, unmistakably, that the main route is south in Chatham Strait. 
Only one fish went north, and it was retaken near the northern end of Stephens 
Passage. One returned to the open ocean and was retaken on the outside coast of 
Baranof Island at Crawfish Inlet, and one went to Sumner Strait. 
Except for the fish recaptured in Icy Strait or the immediate vicinity, the time 
that elapsed between tagging and recapturing was noticeably longer than was the 
case with the red salmon. Most of the red salmon tagged in Icy Strait and retaken 
in Chatham Strait were captured less than 20 days after they were tagged, but most 
of the cohoes were free for a much longer time (30 to 57 days). The significance of 
this is not clear, but it seems probable that the cohoes were taken close to their 
spawning grounds, while the reds taken in Chatham Strait were destined for more 
distant streams. It has been shown conclusively (by the tagging experiments along 
the Alaska Peninsula) that salmon bound for distant streams travel at a more rapid 
rate than those bound for near-by spawning grounds. In this case the fact that the 
red salmon spawn somewhat earlier than the cohoes may also have influenced their 
more rapid progress. 
