Stephen Walsh, Ph.D.
Stephen Walsh is a retired Research Fish Biologist with USGS-WARC in Gainesville, Florida.
Stephen's primary expertise is in the general fields of ichthyology and fish biology, with secondary expertise in aquatic ecology and ecophysiology. Most of his research has been focused in lotic and estuarine systems throughout the Southeast. Additionally, he has conducted research in the Neotropics, Africa, and Micronesia. His research interests include conservation biology and biodiversity of aquatic organisms; ecology and environmental physiology of fishes and aquatic invertebrates; evolution, systematics, and zoogeography of temperate and tropical freshwater, estuarine, and inshore marine fishes; reproductive biology and physiology of lower vertebrates; life-history strategies.
Education
Ph.D., University of Florida
M.A., Southern Illinois University
B.A., Saint Louis University
Professional Experience
1991-2021, U.S. Fish & Wildlife Service, U.S. Geological Survey
1986-1990, Florida Museum of Natural History
Affiliations
School of Forest Resources and Conservation, Program in Fisheries and Aquatic Sciences, University of Florida (Courtesy Assistant Professor, 2005-present); Florida Museum of Natural History (Courtesy Associate Curator in Ichthyology, 1992-present); Department of Biology, University of Florida (Courtesy Assistant Professor, 1996-present). Served on 13 graduate student committees (University of Florida; University of Southern Mississippi; Southern Illinois University, Valdosta State University).
Science and Products
Guidelines for quality assurance and quality control of fish taxonomic data collected as part of the National Water-Quality Assessment Program
Physiological tolerances of juvenile robust redhorse, Moxostoma robustum: Conservation implications for an imperiled species
Variation in thermal tolerance and routine metabolism among spring- and stream dwelling freshwater sculpins (Teleostei: Cottidae) of the southeastern United States
Status and restoration of the Etowah River, an imperiled Southern Appalachian Ecosystem
An introduced population of the South American callichthyid catfish Hoplosternum littorale in the Indian River Lagoon system, Florida
New species of troglobitic catfish of the genus Prietella (Siluriformes: Ictaluridae) from northeastern Mexico
Southeastern freshwater fishes
[Book review] Land, Water and Development: River Basin Systems and Their Sustainable Management, by M. Newson 1994. "" (Routledge, 1992, London, 351 p.)
Characterizing multitemporal alpine snowmelt patterns for ecological inferences
[Book review] Battle against extinction: Native fish management in the American West, by W. L. Minckley and J. E. Deacon
Comparisons of salinity tolerances and osmotic regulatory capabilities in populations of Sailfin molly (Poecilia latipinna) from brackish and fresh waters
A Systematic Revision of the Neotropical Catfish Family Ageneiosidae (Teleostei: Ostariophysi: Siluriformes)
Science and Products
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Filter Total Items: 51
Guidelines for quality assurance and quality control of fish taxonomic data collected as part of the National Water-Quality Assessment Program
Fish community structure is characterized by the U.S. Geological Survey's National Water-Quality Assessment (NAWQA) Program as part of a perennial, multidisciplinary approach to evaluating the physical, chemical, and biological conditions of the Nation's water resources. The objective of quality assurance and quality control of fish taxonomic data that are collected as part of the NAWQA Program isAuthorsStephen Joseph Walsh, Michael R. MeadorPhysiological tolerances of juvenile robust redhorse, Moxostoma robustum: Conservation implications for an imperiled species
The robust redhorse, Moxostoma robustum (Teleostei: Catostomidae), is an imperiled sucker native to large rivers of the Atlantic slope of the southeastern United States. Juvenile M. robustum were tested for tolerances to temperature, salinity, pH, and hypoxia in order to evaluate basic early life-history requirements. Static (acute) tests resulted in estimates of mean lower temperature tolerancesAuthorsS. J. Walsh, D. C. Haney, C. M. Timmerman, R.M. DorazioVariation in thermal tolerance and routine metabolism among spring- and stream dwelling freshwater sculpins (Teleostei: Cottidae) of the southeastern United States
Evolutionary theory predicts that some aquatic organisms may adapt by directional selection to limiting physical environmental conditions, yet empirical data are conflicting. We sought to test the assumption that sculpins (family Cottidae) inhabiting thermally stable springs of the southeastern United States differ in temperature tolerance and metabolism from populations inhabiting more thermallyAuthorsS. J. Walsh, D. C. Haney, C. M. TimmermanStatus and restoration of the Etowah River, an imperiled Southern Appalachian Ecosystem
Abstract not supplied at this timeAuthorsN.M. Burkhead, S. J. Walsh, B. J. Freeman, J.D. WilliamsAn introduced population of the South American callichthyid catfish Hoplosternum littorale in the Indian River Lagoon system, Florida
Abstract not supplied at this timeAuthorsL.G. Nico, S. J. Walsh, R.H. RobinsNew species of troglobitic catfish of the genus Prietella (Siluriformes: Ictaluridae) from northeastern Mexico
No abstract available.AuthorsS. J. Walsh, Carter R. GilbertSoutheastern freshwater fishes
North America has the richest fauna of temperate freshwater fishes in the world, with about 800 native species in the waters of Canada and the United States. The center of this diversity is in the southeastern United States, where as many as 500 species may exist (62% of the continental fauna north of Mexico). Many coastal marine species also enter fresh waters of the Southeast, and at least 34 foAuthorsStephen J. Walsh, Noel M. Burkhead, James D. Williams[Book review] Land, Water and Development: River Basin Systems and Their Sustainable Management, by M. Newson 1994. "" (Routledge, 1992, London, 351 p.)
Review of: Land, Water and Development: River Basin Systems and Their Sustainable Management. by Malcolm Newson. Psychology Press, Nov 5, 1997. 464 pages. ISBN: 041515507X.AuthorsS. J. WalshCharacterizing multitemporal alpine snowmelt patterns for ecological inferences
No abstract available.AuthorsT. R. Allen, S. J. Walsh[Book review] Battle against extinction: Native fish management in the American West, by W. L. Minckley and J. E. Deacon
Review of: BATTLE AGAINST EXTINCTION: NATIVE FISH MANAGEMENT IN THE AMERICAN WEST. W. L. Minckley and J. E. Deacon (eds.). 1991. The University of Arizona Press, Tucson. ISBN 0-8165-1221-3. 517 p., $40.00 (hardcover).AuthorsS. J. WalshComparisons of salinity tolerances and osmotic regulatory capabilities in populations of Sailfin molly (Poecilia latipinna) from brackish and fresh waters
No abstract available.AuthorsF.G. Nordlie, D. C. Haney, S. J. WalshA Systematic Revision of the Neotropical Catfish Family Ageneiosidae (Teleostei: Ostariophysi: Siluriformes)
Abstract not supplied at this timeAuthorsS. J. Walsh - Science
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