Science activity

Science activity #50153, updated 21 May 2025

Delta Juvenile Fish Monitoring Program [DJFMP]

Description / purpose

The Delta Juvenile Fish Monitoring Program (DJFMP) has monitored natural-origin and hatchery-origin juvenile Chinook Salmon (Oncorhynchus tshawytscha) and other fish species within the San Francisco Estuary (SFE) since 1976 using a combination of midwater trawls and beach seines. Since 2000, three trawl sites and at least 58 beach seine sites have been sampled weekly or biweekly within the SFE and lower Sacramento and San Joaquin Rivers. The main objectives of the DJFMP are:
1. Document the long-term abundance and distribution of juvenile Chinook Salmon in the Delta.
2. Comprehensively monitor throughout the year to document the presence of all races of juvenile Chinook Salmon.
3. Intensively monitor juvenile Chinook salmon during the fall and winter months for use in managing water project operations (Delta Cross Channel gates and water export levels) on a real-time basis.
4. Document the abundance and distribution of Steelhead.
5. Document the abundance and distribution of non-salmonid species.

 

Activity status

  • 1 Awarded / Initiating (1976)
  • 2 In progress / Ongoing (1976 - 2025)
  • 3 Complete

Funding summary

Total allocated funding: $0

Location

Subbasins
Delta regions

Geographic tags

None specified

Products and outputs

Type Title Description Views
Link Delta Juvenile Fish Monitoring Program (DJFMP) website URL for the Delta Juvenile Fish Monitoring Program 7
Report Juvenile Salmon Monitoring Data Management Plan A brief data management and QA/QC document 0
Report Metadata for the Lodi Fish and Wildlife Office's Delta Juvenile Fish Monitoring Program Metadata for the Delta Juvenile Fish Monitoring 0
Link Interagency Ecological Program (IEP) 2019 Work Plan and Funding This Work Plan reflects the annually planned wo 2

Type and context

Science action area

Management themes

Science themes

Types

Science functions

Management actions

Science Topics

Lead implementing organization

Partner implementing organizations

Funding organizations

None specified

Funding programs

None specified

Funding sources

None specified