The study roject will determine the specific survival benefits for salmonid floodplain rearing. The salmon life cycle models are data poor which make predictions from the models uncertain and difficult to defend. This Project will apply - for the first time - new floodplain and Delta markers recorded in the eyes and ears of endangered and harvestable salmon. It will build on a decade of extensive method development to reveal whether these habitats are responsible for producing salmon that successfully enter the ocean, and those that return to spawn.
Regents of the University of California, Davis
Specific objectives of this Project are to:
Objective 1. Develop tools and methods to support and evaluate habitat restoration. Using novel isotope tools in salmon eyes and ears to find: 1) How many juveniles exiting the Delta used the Yolo Bypass floodplain (different inundation scenarios) or Delta?; and, 2) How many winter run and fall run adults relied on these habitats as juveniles?
Objective 2. Investigations into habitat requirements of Delta estuarine and migratory species to support development of life cycle models and other decision support tools. Provide the quantitative data to: 1) Parameterize the contribution of the Yolo Bypass and Delta rearing; and, 2) test the National Marine Fisheries Service (NMFS) Salmon Life Cycle Model (LCM) prediction on the numbers of juveniles using Upper, Middle Sacramento River, Yolo Bypass or Delta at Chipp Island.
Research/Planning (including Science)
Project Benefits a Disadvantaged Community (or SDAC):