Abundance, age, size, sex and coded wire tag recoveries for chinook salmon escapements of Campbell and Quinsam Rivers, 1985 / by J.H. Andrew, M. Lightly and T.M. Webb. : Fs97-4/2007E-PDF

"Intensive spawning ground surveys were conducted on the Campbell and Quinsam rivers in 1985 as part of the chinook key stream program. The Petersen carcass tagging estimate of chinook escapement to the Campbell River was 1,427 + 201 fish (95% CL) and to the Quinsam River was 1,590 + 175 fish (95% CL). In both rivers, males predominated at age 41 and females at age 51. Estimated escapements by age are presented. There were 78 adipose marked chinooks in the Campbell dead recovery and 237 in the Quinsam. Escapements of adipose clipped chinooks, based on these recoveries, were 160 to the Campbell and 393 to the Quinsam. These are presented by age, sex and individual tag code. The total hatchery contribution to the escapements were estimated using coded wire tagged/adipose mark rates at release. In the Campbell, the hatchery contributed 38.9% of the male chinook escapement and 50.3% of the female escapement. In the Quinsam, the hatchery contributed 72.2% of the male and 80.3% of the female escapement"--Abstract, page vi.

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