Table 6. --Comparison between recoveries 1n Sumner Strait and total recoveries (grouped by release 

 area and month), July and August, 1938-42 and 1945. 



-^Total recoveries include only recoveries in known type of gear and with a known recovery 

 location. 



upper Chatham Strait. A direct comparison is dif- 

 ficult, however, because of the proximity of the release 

 dates to the closing dates for the season. 



In summary, it appears that although fish tagged in 

 Icy Strait were recovered throughout the fishing 

 grounds in southeastern Alaska, the prevailing move- 

 ment was eastward through Icy Strait, southward into 

 Chatham Strait, and then eastward into Frederick 

 Sound and Stephens Passage (Figs. 4, 5). Superim- 

 posed on this basic directed movement was a promi- 

 nent nondirected or random type of movement. The 

 proportion of Icy Strait fish going into Lynn Canal 

 and lower Chatham Strait does not appear to be 

 significant. A large percentage of the fish tagged in Icy 

 Strait in 1941 moved very rapidly through Icy Strait 

 into the middle Chatham Strait area. 



Upper Chatham Strait. — Tagging experiments 

 were conducted in upper Chatham Strait in 1940, 

 1941, and 1942. 



Two releases were made in 1 day (13 August) in 

 1940 (Fig. 6, Table 8). One release was at trap WE-36 

 on the east side of upper Chatham Strait and the 

 other at trap WE-25 on the west side. The fishery in 

 Icy Strait had already closed by 13 August and there 

 were only 6 days remaining until the end of the season 



in Chatham Strait. The distributions of recoveries 

 from the two releases did not differ greatly. Most 

 recoveries were made in Chatham Strait near the 

 tagging trap; however, by the second half of the first 

 week after release, the tagged fish had scattered 

 throughout Frederick Sound and Stephens Passage. 

 The bulk of the recoveries of the group released from 

 WE-36 was made within a 9-mile radius of the tagging 

 trap (Fig. 6). Aside from the relatively large numbers 

 recovered in the immediate vicinities of the release 

 points, most of the remaining tagged fish moved 

 rapidly to the south and then east into Frederick 

 Sound. Only one tag of the total recoveries from both 

 releases was from lower Chatham Strait. 



Data from four releases in upper Chatham Strait in 

 1941 are shown in Figure 7 and Table 8. In addition, 

 data from one experiment in 1941 (19 July) with fewer 

 than 50 recoveries are included in Table 10. 



The general movement of fish tagged and released 

 in upper Chatham Strait in 1941 resembled that of the 

 fish tagged in eastern Icy Strait in 1941. A few tagged 



Figure 4. — Tag recoveries per trap by 20-inile intervals mea- 

 sured from points of release in Icy Strait, 1941-42. The average 

 number of recoveries per trap per time period are plotted at the 

 centers of the 20-mile intervals. 



12 



