2026 IEP Workshop Poster Exhibits

Below are some of the posters and abstracts from the 2026 IEP Annual Workshop that authors have made available for viewing. If an author did not share their poster for exhibit, you can contact them directly using their contact information in the Abstract Booklet (PDF).

Best Poster Presentation Winners

  • Pachia Lee (DWR) [Available - see category New Technologies]
  • Lalayna Hablutzel (CDFW) [Available - see category Delta or Longfin Smelt]
  • Andres Mendoza (USFWS) [Not Available - contact author directly]

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Celeste Dodge -- Methods for Defining the Sample Frame and Estimating Habitat Volumes for Juvenile Pelagic Fish Studies in the San Francisco Estuary

published on APRIL 24, 2026
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APRIL 24, 2026

This poster presents the methods and data products of the Monitoring Survey Design Team (Design Team) that form the geographic basis for the design and analysis of the California Department of Fish and Wildlife (CDFW) long-term monitoring studies conducted in the San Francisco Estuary (SFE). These products are intended to serve as a foundation for a spatial design to standardize methods for estimating regional fish abundance across CDFW pelagic fish monitoring studies conducted in the SFE, including Smelt Larval Survey, 20mm, Summer Townet, Fall Midwater Trawl, and the San Francisco Bay Study, which are all part of the Interagency Ecological Program (IEP). Here, we present the methods behind new data resources intended to standardize the approach to defining spatial extents and the inputs used to determine critical catch per unit of effort (CPUE) estimates, including design-based abundance (DBA) indices with units and uncertainty. The spatial extent and methods for calculating expansion factors (water volume and surface area) provide an improved means to estimate pelagic fish abundance consistently across CDFW surveys in the SFE. Using the latest bathymetric data for the SFE (DWR & USGS, 2025), we have updated and increased standardization for volume and surface area expansion factors for CPUE, including implementing a spatially variable water surface elevation, making sample frame refinements, and creating a new hydrologic footprint for the SFE. We define the sample frame as the continuous geographic area containing the SFE, subdivided into smaller nested areas we term regions (n=7), strata (n=12), and subregions (n=35). Our operational footprint differs from the U.S. Fish & Wildlife Service (USFWS) Enhanced Delta Smelt Monitoring (EDSM) program, but our method for defining the hydrological footprint and geographic regions, are adaptations of EDSM’s. Our hydrological footprint is a customized selection of USFWS National Wetlands Inventory (NWI) features, including estuarine, marine, riverine, and lake features.

Authors:
• Celeste M. Dodge*, California Department of Fish and Wildlife, celeste.dodge@wildlife.ca.gov
• Steven B. Slater, California Department of Fish and Wildlife
• Aroon R. Melwani, Applied Marine Sciences, Inc.

*Presenting author

Categories:Management Policy & Social Science

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