Percent natural-origin salmon and influence on population growth rate estimates.

2Percent natural is the number of juvenile outmigrants estimated from rotary screw trap sampling relative to both natural and hatchery production in a given spawning year, except in 2004 where our empirical value from this study was used.
3Population growth rate estimated using a factor of 3 increases in survival of natural-origin fish.
4Calcualtion of the value of θt required to produce a stable population (λN = 1) and the factor difference between this value and our proxy. Note: Growth rate analysis could only be conducted through year 2004, as it requires 5 year classes to return and spawn.