Release_Group: Name of specific cohort of hatchery salmon. Generally defined here by major rearing facility or release site and brood year. UGI (s): "Same as ""Release_Group"", but with the addition of specific rearing treatment within the release group." Stock: Origin of broodstock used for release groups Species: This dataset includes Chinook and Sockeye Salmon Run_Type: "This dataset includes spring, summer and fall run types." SpRRT: "Species, run, rear-type. Species: Chinook = 1, Sockeye = 4. Run: Spring = 1 , Summer = 2 , Fall = 3. Rear-type: Hatchery = H. " SubRegion: "USGS hydrologic unit, subregion" SubBasin: "USGS hydrologic unit, subbasin" PreSmolt_Rearing: Includes rearing site(s) after initial ponding of fry through either release or transport to an additional acclimation site. Abbreviations are consistent with site abbreviations in PTAGIS. Acclimation_Site: Final rearing site used to acclimate fish prior to release. Abbreviations are consistent with site abbreviations in PTAGIS. Release_Site: Release site for release group. Abbreviations are consistent with site abbreviations in PTAGIS. Release_River: River where release group was release. Release_RKM: River kilometer (rkm) of where release group was released. These are distances from the mouth of the Columbia River. Treat_Comm: "summary of rearing treatment. WW = wild by wild cross, HH = hatchery by hatchery cross. INT = integrated broodstock, SEG = segregated broodstock." Rearing_Comm: Additional comments describing rearing locations and treatment descriptions. Published: Status of publication of data. Y/N. Citations: "1st author and date of data publication. See ""Related Works"" for full citations."