What We Do

The Lodi Fish and Wildlife Office promotes native and self-sustaining ecosystems through leadership in restoration, research and monitoring of fishes in California’s Central Valley.

To achieve our objectives, we foster personal and professional development of our staff, and we value strong, productive collaborations, both internally and externally with other organizations, stakeholders and the public. Our work is governed by honesty and integrity, and incorporates excellence in science, creativity and flexibility.

We are a dedicated community partner, committed to working with local organizations to improve environmental conditions, support natural resource-related events and connect with people through fun and educational activities.

The Lodi Fish and Wildlife Office's work toward recovery and conservation of species and their habitats includes:

  • Funding habitat restoration and research projects focused on increasing anadromous fish populations in California's Central Valley through the Anadromous Fish Restoration Program;
  • Conducting field studies to document the status of juvenile fish populations in the Sacramento-San Joaquin River Delta through the Delta Juvenile Fish Monitoring Program;
  • Performing Juvenile Salmonid Survival Studies in the Delta to identify areas of high mortality and to recommend management actions to improve juvenile salmon and steelhead survival;
  • Evaluating and guiding the restoration of spring-run Chinook salmon to the San Joaquin River through the San Joaquin River Restoration Program; and
  • Providing technical assistance and training for members of the public, academic researchers, state and federal agencies and other partners.

Our Services

We provide technical assistance to members of the public, academic researchers, state, federal and local agencies, and collaborative organizations like the Interagency Ecological Program. Our expertise informs Endangered Species Act consultations, supports implementation of the Central Valley Project Improvement Act and helps guide real-time decisions on water-management operations. We also lead training in fish identification, R programming and statistical analysis for state and federal agencies and other partners.

We enjoy supporting our community by contributing to science festivals, fish festivals, environmental clean-ups and other events, as well as connecting with youths through career days, classroom instruction and hands-on activities in the field. 

Our Projects and Research

Delta Juvenile Fish Monitoring Program

The Lodi office's Delta Juvenile Fish Monitoring Program conducts near-daily monitoring of juvenile fishes, participates in multi-agency research activities and contributes to several technical and management committees within the region.

Enhanced Delta Smelt Monitoring Program

The Enhanced Delta Smelt Monitoring Program is a high-effort, year-round program to sample randomly selected locations throughout the San Francisco Estuary. Throughout the year, the program targets three Delta smelt life stages (larvae, juvenile and adult) using multiple gear types, and reports the data in near-real time.

San Joaquin River Restoration Program

We work with multiple agencies and partners to achieve the San Joaquin River Restoration Program's fish restoration goal of restoring naturally reproducing and self-sustaining fish populations, including Chinook salmon, to the San Joaquin River between Friant Dam and the Merced River confluence.

Anadromous Fish Restoration Program

The Anadromous Fish Restoration Program aims to at least double the natural production of anadromous fish in California's Central Valley streams on a long-term, sustainable basis. The AFRP works to achieve the doubling goal through a variety of projects throughout the Central Valley. We work cooperatively with other federal, state and local agencies, nonprofits, for-profit institutions, universities and private landowners on projects that increase available juvenile and adult salmon habitat. 

Science Support Program

The Science Support Program provides statistical, modeling and synthesis support for the office and the region. Among the many activities of this group, the Delta Smelt Life Cycle Model and Juvenile Salmonid Survival Studies are just two examples. Statisticians and biologists in the Lodi and San Francisco Bay-Delta Fish and Wildlife offices have created a Delta Smelt Life-Cycle Model and a Delta Smelt Individual-Based Model to assess and predict the effects of water resource-management actions on the Delta smelt population. The team worked for years to create the models, which help scientists follow trends in fish abundance, reproduction and mortality. Their research has produced many articles in peer-reviewed journals, some of which can be accessed in this collection. Our team also participates in large-scale, multi-agency, juvenile salmonid survival studies in the Sacramento-San Joaquin River Delta. Presently we are conducting juvenile salmon and steelhead survival studies in the south Delta.

Aquatic Invasive Species

We provide technical assistance to people, programs and watershed groups by monitoring the spread of non-native plants and animals. Our goal is to protect and restore healthy, native ecosystems by providing decision support and guidance to our partners working to prevent, manage and mitigate the impacts of non-native species like Chinese mystery snail, bluefin killifish, weather loach and various aquatic vegetation. For more information, see the Service's aquatic invasive speciespage.

Smelt Monitoring Team

The Smelt Monitoring Team reviews a variety of real-time data to assess the risk that longfin smelt and threatened Delta smelt will be trapped or diverted by water-pumping operations, also known as entrainment. The Smelt Monitoring Team — made up of members from the Fish and Wildlife Service, the U.S. Bureau of Reclamation, California Department of Fish and Wildlife, California Department of Water Resources, State Water Resources Board and others — provides advice to the multi-agency Water Operations Management Team to help guide real-time management of operations.

CVPIA Science Integration Team

The CVPIA Science Integration Team is a key effort of the Service and the Bureau of Reclamation to continuously improve collaboration between the two agencies and other stakeholders under a science-based framework that is both transparent and efficient. Our recommendations guide efforts toward the Central Valley Project Improvement Act’s goal of doubling the natural production of Chinook salmon and other anadromous fish from pre-act levels in the Central Valley.

Interagency Ecological Program

The Interagency Ecological Program is a collaboration of six federal agencies and three state of California departments, which have been conducting ecological investigations together since the 1970s. The IEP supports coordination of monitoring, research, modeling and synthesis efforts that aid the management of the Bay-Delta ecosystem and the water that flows through it.

Watershed Stewards Program

Through the Watershed Stewards Program, we collaborate with the California Conservation Corps and AmeriCorps to improve watershed health. The Lodi office hosts and mentors members of the program, whose primary focus is to assist communities and organizations with habitat restoration for threatened and endangered fish species. The program assists with data collection and analysis, restoration-project development and maintenance, and educational outreach.