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A SALMON IN TIJUANA ESTUARY? 
Greg found this adult Chinook salmon, a stray from Northern California's feather River, in the estuary in October 1997. 

Greg Williams, Research Associate 

B.S. Biology - Washington and Lee University, 
M.S. Fisheries - University of Washington 

 Research associate Greg Williams is a fish ecologist / wetland scientist who has been with PERL since 1994.  He received his B.S. in Biology from Washington and Lee University in Virginia (1989), and his M.S. in Fisheries from the University of Washington (1994).  He continues to be involved in long-term monitoring programs at PERL's major study sites:  Sweetwater Marsh National Wildlife Refuge in San Diego Bay, Tijuana River National Estuarine Research Reserve, Los Peñasquitos Lagoon, and San Quintin Bay (Baja, California, Mexico).  Research interests include evaluating fish-habitat relationships in marsh habitats, investigating the spread and impact of exotic species, and assessing habitat functions in newly created/restored marsh habitats.  Currently he is concluding work on several chapters of the PERL Restoration Handbook (due to be published by CRC Press in 2000), investigating food-web interactions among marsh fish assemblages in Tijuana Estuary, and assisting Dr. Sharook Madon in laboratory and field studies of fish feeding periodicity, bioenergetics, and growth. 

 He serves on the Tijuana River National Estuarine Research Reserve's Science Advisory Committee and the Los Peñasquitos Lagoon Foundation Research Committee. One of the more rewarding aspects of his job is facilitating interaction between scientists and the public via interpretive presentations and tours. 

 His favorite fish is the sarcastic fringehead (Neoclinus blanchardi).

Recent publications:

 
  • Williams, G.D., J. Zedler. 1999  Fish assemblage composition in constructed tidal channels of a southern California salt marsh:  influence of channel morphology and alteration history.  Estuaries. 22:702-716.

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  • Williams, G.D., J. Desmond, J. Zedler.  1998.  Extension of two nonindigenous fishes, Acanthogobius flavimanus and Poecilia latipinna, in San Diego Bay marsh habitats.  Cal. Fish and Game, 84:1-17.

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  • Zedler, J.B., G.D. Williams and J. Desmond.  1997.  Wetland mitigation:  Can fishes distinguish between natural and constructed wetlands?  Fisheries 22: 26-28.
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    Recent presentations:

     
  • Williams, G.D., J. West, S. Madon, J. Zedler.  to be presented September 1999.  Integrating fish stomach contents and muscle isotopic composition to understand the Tijuana Estuary food web.  Estuarine Research Federation (ERF) Biennial Meeting, New Orleans, LA.

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  • Williams, G.D., J. Callaway, M. Wells, J. Jackson.  1999. Monitoring and managing Los Peñasquitos Lagoon’s biological resources:  Effects of a rapidly changing watershed.  Coastal Zone ‘99, San Diego, CA.

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  • Williams, G.D. 1998. Monitoring processes and problems in Los Peñasquitos Lagoon:  Evolving management goals in a rapidly changing region.  Invited presentation, Wetland Restoration Symposium, Southern California Academy of Sciences, Cal-Poly Pomona. Pomona, CA.

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  • Williams, G.D., J. Desmond, J. B. Zedler. 1997. Distribution and abundance of nonindigenous fishes in San Diego Bay saltmarsh habitats. Southern California Academy of Sciences, Fullerton College Fullerton, CA.

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    Relevant WebLinks:

    Los Penasquitos Lagoon & Torrey Pines State Reserve:  http://www.torreypine.org/

    National Estuarine Research Reserve (NERR) sites:  http://www.nos.noaa.gov/ocrm/nerr/welcome.html

    San Diego Weather Archives:  http://nimbo.wrh.noaa.gov/sandiego/nws.html

    National Wetlands Inventory:  http://www.nwi.fws.gov/

    NOAA Coastal Assessment Group:  http://cads.nos.noaa.gov/

    Scripp’s Ocean Monitoring stations: http://www-mlrg.ucsd.edu/shoresta/

    Nonindigenous species (USGS): http://nas.er.usgs.gov/nas.htm

    San Diego Natural History Museum: http://www.sdnhm.org/
     

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