Table 24. Interval between peak spawning of summer and fall chum salmon in Hood Canal streams, 1983 and 1984. Data from Young (1986a,b).
| 50% dates of spawning completion in 1983 |
50% dates of spawning completion in 1984 |
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| Stream | Summer-run | Fall- run | Interval between peaks (days) | Summer-run | Fall- run | Interval between peaks (days) |
| Tahuya R. | 4 Oct | 15 Dec | 72 | 2 Oct | 1 Dec | 60 |
| Hamma Hamma R. | 26 Sep | 25 Dec | 90 | 29 Sep | 28 Dec | 91 |
| Duckabush R. | 25 Sep | 13 Dec | 79 | 4 Oct | 12 Dec | 66 |
| Dewatto R. | 4 Oct | 9 Dec | 67 | |||
| Big Mission Cr. | 10 Oct | 19 Nov | 40 | |||
| Union R. | 20 Sep | 22 Nov | 63 | |||
| Lilliwuap Cr. | 3 Oct | 22 Dec | 80 | |||
| Dosewalips R. | 28 Sep | 13 Dec | 76 | |||
| Little Quilcene R. | 23 Sep | 22 Dec | 90 | |||
| Average date of 50% spawning completion | 29 Sep | 18 Dec | 81 days | 30 Sep | 10 Dec | 71 days |
Table 25. Percentage and date of return of the total number of chum salmon that returned to the rack (gate) at the Hood Canal Hatchery in 5-year blocks, 1953 to 1996. (Note that the first and last blocks are 8 and 6 years, respectively). Data from Crawford (1997).
| Return Years | 10% Complete | 50% Complete | 90% Complete |
| 1953-60 | Sept. 17 | Oct. 5 | Nov. 30 |
| 1961-65 | Sept. 24 | Nov. 26 | Dec. 22 |
| 1966-70 | Nov. 15 | Nov. 30 | Dec. 11 |
| 1971-75 | Nov. 12 | Nov. 28 | Dec. 13 |
| 1976-80 | Nov. 8 | Nov. 20 | Dec. 4 |
| 1981-85 | Nov. 5 | Nov. 18 | Dec. 6 |
| 1986-90 | Nov. 5 | Nov. 20 | Dec. 4 |
| 1991-96 | Nov. 5 | Nov. 23 | Dec. 5 |