Started in 1995, the Skagit Chinook Restoration Study is a work in progress to be
provisionally complete in 2001, using fish input data through one complete brood year
(BY94), and modified as additional data become available. The intent is to model the
production of Skagit River origin chinook according to discrete chinook life-stages and
habitat preferences, so that: 1) the likely effects of different proposed restoration actions
can be evaluated; and 2) our assumptions about chinook limiting factors can be tested.
Juvenile and adult life history patterns are identified from patterns observed on chinook
otoliths that are collected in various habitat types or zones within the Skagit River basin
or estuary. Fish use and habitat parameters are inventoried throughout the river basin and
estuary to estimate capacity and survival during the following lifestages: spawning,
freshwater rearing and estuary rearing. Adult recruitment rates are estimated by using
coded wire tag data from Skagit River origin indicator stocks. Model inputs, sources of
data, and analytical methods used to generate initial inputs and outputs for Chinook
Restoration Analysis Model are shown in Table 1.
Beamer, E.M., McClure, R.E. and Hayman, B.A., 2000. Fiscal Year 1999 Skagit River Chinook Restoration Research. Skagit System Cooperative, La Conner, WA. pp. 26.
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