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Project: Eyes and Ears: Using Lens and Otolith Isotopes to Quantify Critical Rearing Habitats

Description: 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.

Reference Number: 3600BP1896030

Implemented By: Regents of the University of California, Davis

Objective: 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.

Type: Research/Planning (including Science)

Total Cost: $838,279.00

Project Status: Project Implementation

On Time?: Yes    Within Scope?: Yes    Within Budget?: Yes

Estimated Completion: 12/31/2021    Actual Completion:

Associated Counties:

Project Benefits a Disadvantaged Community (or SDAC): No

Contribution SourcesContribution DateContribution Amount
Prop. 1, Water Quality, Ecosystem Restoration and Fish Protection Facilities - Delta3/1/2019$838,279.00

Project MetricMetric TopicQuantityUnit
Research/Planning (including Science)Modeling  

Water Action Plan Target

Protect and Restore Important EcosystemsAction Description
Manage and Prepare for Dry PeriodsAction Description


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