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Project: Defining the Fundamental Niche of Longfin Smelt

Description: Longfin Smelt are euryhaline, semi-anadromous fish that spawn in the tidal frsh to low-salinity waters of the upper San Francisco Bay Delta estuary, rearing in low-alinity and brackish habitats downstream of the confluence of the Sacramento and San Joaquin Rivers. Their populations have collapsed over the past decades, resulting in their listing as "threatened" under the California State Endangered Species Act. Funding for the project will be use to to study the essential requirements and to fill the knowledge gaps relating to turbidity, age-specific fecundity, and egg and early larval buoyancy. This project will provide knowledge needed to successfully develop culture specific protocols and assist with rearing Longfin Smelt.

Reference Number: 3600BP1896019

Implemented By: Regents of the University of California, Davis

Objective: The project objectives are: -Determine fecundity and healt condition of wild caught broodstock; -Evaluate the impact of salinity and temperature on embryo and larval development and performance; -Determine the impact of commonly detected insecticides on Longfin Smelt embryo and yolk sac larvae development and performance determine differences in growth and maturation of Longfin Smelt under different salinity and thermal regimes; and -Determine carryover effects in growth and maturation of Longfin Smelt following early life stage exposures to insecticides present in the San Francisco Bay Delta.

Type: Research/Planning (including Science)

Total Cost: $1,597,446.00

Project Status: Project Implementation

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

Estimated Completion: 6/30/2022    Actual Completion:

Associated Counties:

Project Benefits a Disadvantaged Community (or SDAC): Yes

Contribution SourcesContribution DateContribution Amount
Prop. 1, Water Quality, Ecosystem Restoration and Fish Protection Facilities - Delta10/11/2018$1,597,446.00

Project MetricMetric TopicQuantityUnit
Research/Planning (including Science)Other  

Water Action Plan Target

Achieve the Co-Equal Goals for the DeltaAction Description
Protect and Restore Important EcosystemsAction Description


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