Larry Brown (Former Employee)
Science and Products
Filter Total Items: 121
Analysis of pelagic species decline in the upper San Francisco Estuary using multivariate autoregressive modeling (MAR)
Four species of pelagic fish of particular management concern in the upper San Francisco Estuary, California, USA, have declined precipitously since ca. 2002: delta smelt (Hypomesus transpacificus), longfin smelt (Spirinchus thaleichthys), striped bass (Morone saxatilis), and threadfin shad (Dorosoma petenense). The estuary has been monitored since the late 1960s with extensive collection of data
Authors
Ralph Mac Nally, James R. Thomson, Wim J. Kimmerer, Frederick Feyrer, Ken B. Newman, Andy Sih, William A. Bennett, Larry R. Brown, Erica Fleishman, Steven D. Culberson, Gonzalo Castillo
Comparison of thiaminase activity in fish using the radiometric and 4-nitrothiophenol colorimetric methods
NoticeThis publication has been retracted. See the retraction notice.
Authors
D. C. Honeyfield, J.W. Hanes, L. Brown, C.E. Kraft, T.P. Begley
Increase in lake trout reproduction in Lake Huron following the collapse of alewife: Relief from thiamine deficiency or larval predation?
In the Great Lakes there is still uncertainty as to the population level effects of a thiamine deficiency on salmonines caused by high consumption of alewives Alosa pseudoharengus. A resurgence of lake trout Salvelinus namaycush reproduction in Lake Huron following the crash of alewife stocks between 2002 and 2004 provided an opportunity to evaluate the relative effects of this crash on reproducti
Authors
J.D. Fitzsimons, S. Brown, L. Brown, D. Honeyfield, J. He, J.E. Johnson
Bayesian change point analysis of abundance trends for pelagic fishes in the upper San Francisco Estuary
We examined trends in abundance of four pelagic fish species (delta smelt, longfin smelt, striped bass, and threadfin shad) in the upper San Francisco Estuary, California, USA, over 40 years using Bayesian change point models. Change point models identify times of abrupt or unusual changes in absolute abundance (step changes) or in rates of change in abundance (trend changes). We coupled Bayesian
Authors
James R. Thompson, Wim J. Kimmerer, Larry R. Brown, Ken B. Newman, Ralph Mac Nally, William A. Bennett, Frederick Feyrer, Erica Fleishman
Comparison of watershed disturbance predictive models for stream benthic macroinvertebrates for three distinct ecoregions in western US
The successful use of macroinvertebrates as indicators of stream condition in bioassessments has led to heightened interest throughout the scientific community in the prediction of stream condition. For example, predictive models are increasingly being developed that use measures of watershed disturbance, including urban and agricultural land-use, as explanatory variables to predict various metric
Authors
Ian R. Waite, Larry R. Brown, Jonathan Kennen, Jason T. May, Thomas F. Cuffney, James L. Orlando, Kimberly A. Jones
Effects of hydrologic infrastructure on flow regimes of California's Central Valley rivers: Implications for fish populations
Alteration of natural flow regimes is generally acknowledged to have negative effects on native biota; however, methods for defining ecologically appropriate flow regimes in managed river systems are only beginning to be developed. Understanding how past and present water management has affected rivers is an important part of developing such tools. In this paper, we evaluate how existing hydrologi
Authors
Larry R. Brown, Marissa L. Bauer
Status and conservation of lampreys in California
Abstract.—Lampreys are among the least studied group of fishes in California. At least seven species inhabit freshwater habitats within the state, including the Kern brook lamprey Lampetra hubbsi, a California endemic. Four species are micropredators on fish, Pacific lamprey Entosphenus tridentatus (formerly L. tridentata), river lamprey L. ayresii, Klamath lamprey E. similis (formerly L. similis)
Authors
Peter B. Moyle, Larry R. Brown, Shawn D. Chase, Rebecca M. Quiñones
Selected Physical, Chemical, and Biological Data Used to Study Urbanizing Streams in Nine Metropolitan Areas of the United States, 1999-2004
This report documents and summarizes physical, chemical, and biological data collected during 1999-2004 in a study titled Effects of Urbanization on Stream Ecosystems, undertaken as part of the U.S. Geological Survey's National Water-Quality Assessment Program. Data-collection methods and data processing are described in this report for streamflow; stream temperature; instream chemistry; instream
Authors
Elise M. P. Giddings, Amanda H. Bell, Karen M. Beaulieu, Thomas F. Cuffney, James F. Coles, Larry R. Brown, Faith A. Fitzpatrick, James A. Falcone, Lori A. Sprague, Wade L. Bryant, Marie C. Peppler, Cory Stephens, Gerard McMahon
Why are diverse relationships observed between phytoplankton biomass and transport time?
Transport time scales such as flushing time and residence time are often used to explain variability in phytoplankton biomass. In many cases, empirical data are consistent with a positive phytoplankton‐transport time relationship (i.e., phytoplankton biomass increases as transport time increases). However, negative relationships, varying relationships, or no significant relationship may also be ob
Authors
Lisa V. Lucas, Janet K. Thompson, Larry R. Brown
Relation of urbanization to stream fish assemblages and species traits in nine metropolitan areas of the United States
We examined associations of fish assemblages and fish traits with urbanization and selected environmental variables in nine major United States metropolitan areas. The strongest relations between fishes and urbanization occurred in the metropolitan areas of Atlanta, Georgia; Birmingham, Alabama; Boston, Massachusetts; and Portland, Oregon. In these areas, environmental variables with strong associ
Authors
Larry R. Brown, M. Brian Gregory, Jason T. May
Managing water to protect fish: A review of California's environmental water account, 2001-2005
The Sacramento-San Joaquin Delta, the landward reach of the San Francisco Estuary, provides habitat for threatened delta smelt, endangered winter-run Chinook salmon, and other species of concern. It is also the location of huge freshwater diversion facilities that entrain large numbers of fish. Reducing the entrainment of listed fishes into these facilities has required curtailment of pumping, red
Authors
L. R. Brown, W. Kimmerer, R. Brown
Variations of thiaminase I activity pH dependencies among typical Great Lakes forage fish and Paenibacillus thiaminolyticus.
The source of thiaminase in the Great Lakes food web remains unknown. Biochemical characterization of the thiaminase I activities observed in forage fish was undertaken to provide insights into potential thiaminase sources and to optimize catalytic assay conditions. We measured the thiaminase I activities of crude extracts from five forage fish species and one strain of Paenibacillus thiaminolytic
Authors
J.L. Zajicek, L. Brown, S.B. Brown, D. C. Honeyfield, J.D. Fitzsimons, D. E. Tillitt
Science and Products
Filter Total Items: 121
Analysis of pelagic species decline in the upper San Francisco Estuary using multivariate autoregressive modeling (MAR)
Four species of pelagic fish of particular management concern in the upper San Francisco Estuary, California, USA, have declined precipitously since ca. 2002: delta smelt (Hypomesus transpacificus), longfin smelt (Spirinchus thaleichthys), striped bass (Morone saxatilis), and threadfin shad (Dorosoma petenense). The estuary has been monitored since the late 1960s with extensive collection of data
Authors
Ralph Mac Nally, James R. Thomson, Wim J. Kimmerer, Frederick Feyrer, Ken B. Newman, Andy Sih, William A. Bennett, Larry R. Brown, Erica Fleishman, Steven D. Culberson, Gonzalo Castillo
Comparison of thiaminase activity in fish using the radiometric and 4-nitrothiophenol colorimetric methods
NoticeThis publication has been retracted. See the retraction notice.
Authors
D. C. Honeyfield, J.W. Hanes, L. Brown, C.E. Kraft, T.P. Begley
Increase in lake trout reproduction in Lake Huron following the collapse of alewife: Relief from thiamine deficiency or larval predation?
In the Great Lakes there is still uncertainty as to the population level effects of a thiamine deficiency on salmonines caused by high consumption of alewives Alosa pseudoharengus. A resurgence of lake trout Salvelinus namaycush reproduction in Lake Huron following the crash of alewife stocks between 2002 and 2004 provided an opportunity to evaluate the relative effects of this crash on reproducti
Authors
J.D. Fitzsimons, S. Brown, L. Brown, D. Honeyfield, J. He, J.E. Johnson
Bayesian change point analysis of abundance trends for pelagic fishes in the upper San Francisco Estuary
We examined trends in abundance of four pelagic fish species (delta smelt, longfin smelt, striped bass, and threadfin shad) in the upper San Francisco Estuary, California, USA, over 40 years using Bayesian change point models. Change point models identify times of abrupt or unusual changes in absolute abundance (step changes) or in rates of change in abundance (trend changes). We coupled Bayesian
Authors
James R. Thompson, Wim J. Kimmerer, Larry R. Brown, Ken B. Newman, Ralph Mac Nally, William A. Bennett, Frederick Feyrer, Erica Fleishman
Comparison of watershed disturbance predictive models for stream benthic macroinvertebrates for three distinct ecoregions in western US
The successful use of macroinvertebrates as indicators of stream condition in bioassessments has led to heightened interest throughout the scientific community in the prediction of stream condition. For example, predictive models are increasingly being developed that use measures of watershed disturbance, including urban and agricultural land-use, as explanatory variables to predict various metric
Authors
Ian R. Waite, Larry R. Brown, Jonathan Kennen, Jason T. May, Thomas F. Cuffney, James L. Orlando, Kimberly A. Jones
Effects of hydrologic infrastructure on flow regimes of California's Central Valley rivers: Implications for fish populations
Alteration of natural flow regimes is generally acknowledged to have negative effects on native biota; however, methods for defining ecologically appropriate flow regimes in managed river systems are only beginning to be developed. Understanding how past and present water management has affected rivers is an important part of developing such tools. In this paper, we evaluate how existing hydrologi
Authors
Larry R. Brown, Marissa L. Bauer
Status and conservation of lampreys in California
Abstract.—Lampreys are among the least studied group of fishes in California. At least seven species inhabit freshwater habitats within the state, including the Kern brook lamprey Lampetra hubbsi, a California endemic. Four species are micropredators on fish, Pacific lamprey Entosphenus tridentatus (formerly L. tridentata), river lamprey L. ayresii, Klamath lamprey E. similis (formerly L. similis)
Authors
Peter B. Moyle, Larry R. Brown, Shawn D. Chase, Rebecca M. Quiñones
Selected Physical, Chemical, and Biological Data Used to Study Urbanizing Streams in Nine Metropolitan Areas of the United States, 1999-2004
This report documents and summarizes physical, chemical, and biological data collected during 1999-2004 in a study titled Effects of Urbanization on Stream Ecosystems, undertaken as part of the U.S. Geological Survey's National Water-Quality Assessment Program. Data-collection methods and data processing are described in this report for streamflow; stream temperature; instream chemistry; instream
Authors
Elise M. P. Giddings, Amanda H. Bell, Karen M. Beaulieu, Thomas F. Cuffney, James F. Coles, Larry R. Brown, Faith A. Fitzpatrick, James A. Falcone, Lori A. Sprague, Wade L. Bryant, Marie C. Peppler, Cory Stephens, Gerard McMahon
Why are diverse relationships observed between phytoplankton biomass and transport time?
Transport time scales such as flushing time and residence time are often used to explain variability in phytoplankton biomass. In many cases, empirical data are consistent with a positive phytoplankton‐transport time relationship (i.e., phytoplankton biomass increases as transport time increases). However, negative relationships, varying relationships, or no significant relationship may also be ob
Authors
Lisa V. Lucas, Janet K. Thompson, Larry R. Brown
Relation of urbanization to stream fish assemblages and species traits in nine metropolitan areas of the United States
We examined associations of fish assemblages and fish traits with urbanization and selected environmental variables in nine major United States metropolitan areas. The strongest relations between fishes and urbanization occurred in the metropolitan areas of Atlanta, Georgia; Birmingham, Alabama; Boston, Massachusetts; and Portland, Oregon. In these areas, environmental variables with strong associ
Authors
Larry R. Brown, M. Brian Gregory, Jason T. May
Managing water to protect fish: A review of California's environmental water account, 2001-2005
The Sacramento-San Joaquin Delta, the landward reach of the San Francisco Estuary, provides habitat for threatened delta smelt, endangered winter-run Chinook salmon, and other species of concern. It is also the location of huge freshwater diversion facilities that entrain large numbers of fish. Reducing the entrainment of listed fishes into these facilities has required curtailment of pumping, red
Authors
L. R. Brown, W. Kimmerer, R. Brown
Variations of thiaminase I activity pH dependencies among typical Great Lakes forage fish and Paenibacillus thiaminolyticus.
The source of thiaminase in the Great Lakes food web remains unknown. Biochemical characterization of the thiaminase I activities observed in forage fish was undertaken to provide insights into potential thiaminase sources and to optimize catalytic assay conditions. We measured the thiaminase I activities of crude extracts from five forage fish species and one strain of Paenibacillus thiaminolytic
Authors
J.L. Zajicek, L. Brown, S.B. Brown, D. C. Honeyfield, J.D. Fitzsimons, D. E. Tillitt
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government