Science activity
Science activity #49819, updated 29 April 2022

Reconstructing juvenile salmon growth, condition and Delta habitat use in the 2014-15 drought and beyond

Description / purpose

This study uses otolith chemistry and microstructure to monitor how salmon use the Delta as rearing habitat and a migratory corridor, and the mechanisms cuing their outmigration from natal rivers. We will quantify the extent to which Delta-rearing contributes to salmon population resilency under different conditions (including drought and flood conditions) and provide baseline data to assess population responses to future habitat restoration and changing climate. Physical tags are limited to larger fish that are more sea-ready than fry, and are thus ineffective to estimate the full rearing potential of Delta habitats, while abundance surveys provide only a snapshot of information. Otolith reconstructions allow us to estimate “who” is using the Delta (which populations and life history types), for how long, and their growth rates relative to other rearing habitats. This project will generate empirical data that will inform management actions aimed at maximizing salmon abundance, life history diversity, and resilience to future stressors.

Linked science activities

None specified

Activity status

  • Awarded / Initiating (2016)
  • In progress / Ongoing (0 - 0)
  • Complete

Funding summary

Total allocated funding: $800,484

Label Value
Contract # or labor code None
Implementing organization University of California - Davis [UC Davis]
Funding organization California Department of Fish and Wildlife [CDFW]
Funding Source California Department of Fish and Wildlife CDFW - Prop 1
Date of award Not provided
Date of fiscal year-end Not provided
Total award amount $800,484
State type of obligation Not provided
Federal type of obligation Not provided
Reimbursability Not provided
Procurement mechanism Not provided


Delta regions

Geographic tags

None specified

Products and outputs

None provided

Type and context

Science action area
Management themes
Science themes
Science functions
None specified
Management actions
None specified
Science Topics
Lead implementing organization
Partner implementing organizations
None specified
Funding organizations
Funding programs
Funding sources