The method for calculating Smolt-to-Adult Ratio (SAR) estimates for CWT is based on:
Skalski J.R., and R.L. Townsend. 2005. Pacific Northwest Hatcheries Smolt-to-Adult Ratio (SAR) Estimation using Coded Wire Tags (CWT) Data. Technical Report to Bonneville Power Administration, Project No. 1991-051-00, Contract No. 00013690.