Hierarchical Modeling of Juvenile Chinook Salmon Survival as a Function of Sacramento–San Joaquin Delta Water Exports

摘要: Abstract A multiyear study was carried out in the Sacramento–San Joaquin Delta system to examine relationship between survival of out-migrating Chinook salmon Oncorhynchus tshawytscha and amount water exported from by two major pumping stations southern portion delta. Paired releases groups coded-wire-tagged juvenile late-fall-run were made at locations delta, one main-stem Sacramento River interior delta where they more likely be directly affected stations. Shortly after release, fish recovered downstream a midwater trawl, over 2–4-year period ocean fishery catches spawning ground surveys. Bayesian hierarchical model for recoveries fit that explicitly accounted between-release variation capture probabilities as well sampling recoveries. The ...