Life-history monitoring protocol- Every March, just prior to release, we sample 60 fish per raceway
- Measure length, weight, condition factor, gender
- Measure 11-KT in plasma of all males to determine maturity status
Conclusions- Minijack rates at release and Prosser vary annually and are highly correlated
- Rates are strongly correlated with size at release
- Rates are 10-20 fold lower in Wild fish
- Female biased gender ratios are found in both wild and hatchery fish