264 
Fishery Bulletin 117(3) 
Table 3 
Residence times of adult Chinook salmon (Oncorhynchus tshawytscha ) tagged 
in Lake Washington in western Washington during 2005 and 2006, with mean 
number of days and standard deviations (SDs) given in the upper table and mean 
proportions of time and SDs provided in the lower table, by migration segment 
and year. Residence times were measured by acoustic (number of tags [n]=26) 
and archival (n= 67) tags or by archival tags only. For each migration segment, 
the number of tags used to generate the estimate is shown in parentheses. 
Mean number of days (SD) 
Migration segment (no. of tags) 
2005 
2006 
Grand 
Estuary (lower and upper: 93) 
15.8(7.3) 
17.2(7.7) 
16.5 (7.5) 
Ship canal (92) 
0.6 (0.3) 
0.4 (0.3) 
0.5 (0.3) 
Lake Washington (93) 
6.8 (6.5) 
8.9 (7.9) 
7.9 (7.3) 
Sammamish River (66) 
8.8 (6.2) 
6.3 (6.0) 
7.5 (6.2) 
Lake Sammamish (62) 
4.6 (3.9) 
4.8(4.1) 
4.7 (3.9) 
Total 
34.1 (9.7) 
36.0 (8.9) 
35.1 (9.3) 
Mean proportion of time (SD) 
Migration segment 
2005 
2006 
Grand 
Estuary (lower and upper) 
47% (19) 
47% (17) 
47% (18) 
Ship canal 
2% (1) 
1% (1) 
2% (1) 
Lake Washington 
15% (12) 
20% (21) 
18% (17) 
Sammamish River 
24% (16) 
17% (13) 
20% (15) 
Lake Sammamish 
13% (13) 
13% (10) 
13% (11) 
Table 4 
Temperatures experienced (ranges and means) by Chinook salmon (Oncorhynchus tshawytscha ) during upriver migration in rela¬ 
tion to tagging week in 2005 and 2006 in coastal waters of Washington near Puget Sound. Segments of migration include the lower 
and upper estuary of the Lake Washington watershed, ship canal, Lake Washington, Lake Sammamish, Sammamish River, and 
entryways of tributaries. Dates of tagging weeks are provided in Table 1. 
Migration segment 
Group 
Lower estuary 
Upper estuary 
Ship canal 
L. Washington 
L. Sammamish 
Sammamish R. ' 
Frib. entry 
Range 
Mean 
Range 
Mean 
Range 
Mean 
Range 
Mean 
Range 
Mean 
Range 
Mean 
Mean 
Week 1 
11.9-17.9 
14.0 
16.3-21.9 
19.1 
18.9-21.4 
20.4 
9.6-21.4 
16.4 
13.3-20.4 
17.4 
13.0-19.5 
16.6 
11.0 
Week 2 
12.1-17.8 
14.6 
16.0-22.3 
19.1 
17.9-22.0 
20.2 
9.6-21.5 
17.1 
13.0-20.4 
17.2 
12.5-18.9 
15.2 
12.5 
Week 3 
12.4-17.9 
14.7 
16.0-22.6 
19.1 
18.3-22.3 
20.4 
9.3-21.5 
16.9 
12.8-20.5 
16.9 
12.5-19.3 
15.3 
12.4 
Week 4 
12.5-18.3 
14.9 
15.9-21.3 
18.5 
18.0-20.6 
19.7 
8.5-20.5 
16.8 
11.9-19.4 
16.5 
10.0-17.1 
14.5 
12.2 
Week 1 
10.1-18.3 
13.8 
15.4-22.5 
19.5 
17.3-22.5 
20.9 
9.5-22.5 
18.1 
12.5-21.5 
17.1 
13.1-21.0 
16.5 
12.8 
Week 2 
11.9-17.4 
13.3 
15.6-21.8 
18.9 
18.1-22.1 
20.4 
9.1-21.6 
17.5 
13.0-20.3 
17.1 
13.5-21.4 
16.7 
12.7 
Week 3 
11.9-17.8 
14.4 
15.9-20.9 
18.4 
18.1-21.0 
19.8 
10.6-21.1 
17.2 
13.0-20.0 
17.2 
13.1-19.3 
15.4 
12.0 
Week 4 
13.3-18.0 
15.2 
16.3-21.1 
18.7 
17.4-21.1 
20.2 
9.1-21.4 
17.4 
13.0-20.5 
17.2 
11.6-18.0 
15.3 
12.3 
Chinook salmon in Puget Sound occupied depths from 
near the surface to >150 m (mean: 15 m in 2005, 20 m in 
2006). In the cooler, mixed lower estuary, most detections 
were at depths <5 m. In the large lock and upper estuary, 
they remained near the bottom at depths of 10-14 m. 
Most detections were at depths <5 m in the ship canal, 
between 5-15 m in Lake Washington, and <3 m near 
tributary deltas. 
The archival data loggers provided 60,406 tempera¬ 
ture records from Chinook salmon prior to entering 
spawning tributaries (mean: 875 records/fish; range: 
477-1477 records/fish). Of these hourly records, 15.0% 
