Cathy Richter, PhD
Dr. Cathy Richter is a Research Molecular Biologist at the Columbia Environmental Research Center.
Science and Products
Fishing, Hunting and Subsistence Living Integrated Science Team
The Fishing, Hunting, and Subsistence Living Integrated Science Team focuses on contaminant and pathogen exposures in the environment that could impact the presence and vitality of fish and wildlife populations that drive commercial, recreational and subsistence activities such as hunting and fishing. If actual risks are identified this project will inform how to economically and effectively...
Filter Total Items: 25
Effects of estrogens and atrazine on functional immune responses of largemouth bass (Micropterus salmoides) Effects of estrogens and atrazine on functional immune responses of largemouth bass (Micropterus salmoides)
Disease outbreaks, skin lesions, fish kill events, and reproductive abnormalities have been observed in wild populations of bass in the Chesapeake Bay watershed. Occurrence of synthetic and natural hormones from wastewater treatment plants and livestock operations, pesticides from agricultural lands, and phytoestrogens from cover crops have been implicated as potential causes of these...
Laboratory estimates of eDNA degradation rates for Actinionais ligamentina eDNA Laboratory estimates of eDNA degradation rates for Actinionais ligamentina eDNA
Data describe a designed environmental DNA (eDNA) experiment for the estimation of eDNA degradation rates for the mucket (Actinonaias ligamentina) from water samples collected in the laboratory. Samples were collected from experiments performed from November 01, 2019 to November 15, 2019 at the USGS Columbia Environmental Research Center, Missouri
Development and testing of a qPCR assay for Lampsilis siliquoidea eDNA Development and testing of a qPCR assay for Lampsilis siliquoidea eDNA
Data describe specificity and sensitivity testing for the L.sil2 assay. This assay is used to amplify eDNA from the freshwater mussel Lampsilis siliquoidea.
Environmental DNA shedding rates in laboratory conditions for Cumberlandia monodonta, Actinonaias ligamentina, and Lampsilis siliquoidea. Environmental DNA shedding rates in laboratory conditions for Cumberlandia monodonta, Actinonaias ligamentina, and Lampsilis siliquoidea.
Data describe designed environmental DNA (eDNA) experiments for the estimation of eDNA shedding rates for the spectaclecase (Cumberlandia monodonta), mucket (Actinonaias ligamentina), and fatmucket (Lampsilis siliquoidea) from water samples collected in the laboratory under differing laboratory conditions. Shedding rates were tested under variable mussel biomass, diet, and temperature...
Alternative complement pathway assay data for adult largemouth bass exposed in outdoor ponds to 17alpha-ethinylestradiol or an estrone-atrazine mixture Alternative complement pathway assay data for adult largemouth bass exposed in outdoor ponds to 17alpha-ethinylestradiol or an estrone-atrazine mixture
Alternative complement pathway assay data observed in adult largemouth bass plasma in response to an EE2 (17alpha-ethinylestradiol) or mixture of estrone and atrazine exposure under laboratory pond conditions, with associated fish identification information.
Water chemistry and molecular eDNA data observed in experimental laboratory mesocosms exposed to different nitrogen amendments in the presence or absence of a nitrifier enriched microbial community Water chemistry and molecular eDNA data observed in experimental laboratory mesocosms exposed to different nitrogen amendments in the presence or absence of a nitrifier enriched microbial community
Data describe the results of a controlled laboratory mesocosm experiment evaluating the influence of a nitrifier enriched microbial community on silver carp (Hypophthalmichthys molitrix) milt eDNA degradation. Parameters described include the concentration results, limit of detection, and limit of quantification of two silver carp specific quantitative PCR assays and water chemistry...
Filter Total Items: 49
First documentation of grass carp spawning in Lake Erie’s Central Basin First documentation of grass carp spawning in Lake Erie’s Central Basin
Grass carp (Ctenopharyngodon idella) are non-indigenous to North America having been translocated to the United States in the 1960s as a potential non-chemical solution for nuisance aquatic vegetation. Reproductively viable grass carp now exist in many watersheds in the United States. In the Great Lakes basin, grass carp were first discovered in the 1980s with direct confirmation of...
Authors
Corbin David Hilling, Adam J. Landry, James Roberts, Nathan Thompson, Cathy A. Richter, Ryan E. Brown, Christine M. Mayer, Song S. Qian
Immunomodulation in adult largemouth bass (Micropterus salmoides) exposed to a model estrogen or mixture of endocrine disrupting contaminants during early gonadal recrudescence Immunomodulation in adult largemouth bass (Micropterus salmoides) exposed to a model estrogen or mixture of endocrine disrupting contaminants during early gonadal recrudescence
Disease outbreaks, skin lesions, fish kill events, and reproductive abnormalities have been observed in wild populations of Centrarchids in watersheds throughout the United States. Occurrence of synthetic and natural hormones from wastewater treatment plants and livestock operations, pesticides from agricultural land use, and phytoestrogens have been implicated as potential causes of...
Authors
Jessica Kristin Leet, Catherine A. Richter, Rachel Claunch, Robert Gale, Donald E. Tillitt, Luke R. Iwanowicz
Evolutionary and ecological correlates of thiaminase in fishes Evolutionary and ecological correlates of thiaminase in fishes
Thiamine (vitamin B1) is required by all living organisms in multiple metabolic pathways. It is scarce in natural systems, and deficiency can lead to reproductive failure, neurological issues, and death. One major cause of thiamine deficiency is an overreliance on diet items containing the enzyme thiaminase. Thiaminase activity has been noted in many prey fishes and linked to cohort...
Authors
Freya Elizabeth Rowland, Cathy A. Richter, Donald E Tillitt, David Walters
Toward invasive mussel genetic biocontrol: Approaches, challenges, and perspectives Toward invasive mussel genetic biocontrol: Approaches, challenges, and perspectives
Invasive freshwater mussels, such as the zebra (Dreissena polymorpha), quagga (Dreissena rostriformis bugensis), and golden (Limnoperna fortunei) mussel have spread outside their native ranges throughout many regions of the North American, South American, and European continents in recent decades, damaging infrastructure and the environment. This review describes ongoing efforts by...
Authors
Victor H. Hernandez Elizarraga, Scott Ballantyne, Lindsey Gengelbach, Juliana A. Americo, Steven T. Suhr, Marie-Claude Senut, Ben Minerich, Christopher M. Merkes, Thea M. Edwards, Katy E. Klymus, Cathy A. Richter, Diane L. Waller, Yale J. Passamaneck, Mauro de F. Rebelo, Daryl M. Gohl
A nitrifier-enriched microbial community contributes to the degradation of environmental DNA A nitrifier-enriched microbial community contributes to the degradation of environmental DNA
Environmental DNA (eDNA) surveys are a promising alternative to traditional monitoring of invasive species, rare species, and biodiversity. Detecting organism-specific eDNA reduces the need to collect physical specimens for population estimates, and the high sensitivity of eDNA assays may improve detection of rare or cryptic species. However, correlating estimated concentrations of eDNA...
Authors
Rachelle Elaine Beattie, Caren C. Helbing, Jacob J. Imbery, Katy E. Klymus, Jonathan Lopez Duran, Cathy A. Richter, Anita A. Thambirajah, Nathan Thompson, Thea M. Edwards
When are environmental DNA early detections of invasive species actionable? When are environmental DNA early detections of invasive species actionable?
Environmental DNA (eDNA) sampling provides sensitive early detection capabilities for recently introduced taxa. However, natural resource managers struggle with how to integrate eDNA results into an early detection rapid response program because positive eDNA detections are not always indicative of an eventual infestation. We used a structured decision making (SDM) framework to evaluate
Authors
Adam Sepulveda, Christine E. Dumoulin, Denise L. Blanchette, John Mcphedran, Colin Holme, Nathan Whalen, Margaret Hunter, Christopher M. Merkes, Catherine A. Richter, Matthew Neilson, Wesley M. Daniel, Devin Nicole Jones-Slobodian, David R. Smith
Non-USGS Publications**
Taylor, J.A., Richter, C.A., Suzuki, A., Watanabe, H., Iguchi, T., Coser, K.R., Shioda, T., and vom Saal, F.S., 2012, Dose-related estrogen effects on gene expression in fetal mouse prostate mesenchymal cells: PLOS ONE, v. 7, no. 10, p. e48311
Taylor, J.A., Richter, C.A., Ruhlen, R.L., and vom Saal, F.S., 2011, Estrogenic environmental chemicals and drugs: Mechanisms for effects on the developing male urogenital system: The Journal of Steroid Biochemistry and Molecular Biology, v. 127, no. 1, p. 83-95
Richter, C.A., Taylor, J.A., Ruhlen, R.L., Welshons, W.V., and vom Saal, F.S., 2007, Estradiol and Bisphenol A stimulate androgen receptor and estrogen receptor gene expression in fetal mouse prostate mesenchyme cells: Environmental Health Perspectives, v. 115, no. 6, p. 902-908
vom Saal, F.S., Richter, C.A., Mao, J., and Welshons, W.V., 2005, Commercial animal feed: Variability in estrogenic activity and effects on body weight in mice: Birth Defects Research Part A: Clinical and Molecular Teratology, v. 73, no. 7, p. 474-475
Timms, B.G., Howdeshell, K.L., Barton, L., Bradley, S., Richter, C.A., and vom Saal, F.S., 2005, Estrogenic chemicals in plastic and oral contraceptives disrupt development of the fetal mouse prostate and urethra: Proceedings of the National Academy of Sciences of the United States of America, v. 102, no. 19, p. 7014-7019
Richter, C., Timms, B., and vom Saal, F., 2005, Prostate development: mechanisms for opposite effects of low and high doses of estrogenic chemicals, in Naz, R., ed., Endocrine Disruptors: Effects on Male and Female Reproductive Systems: New York, CRC Press, p. 379-410.
vom Saal, F.S., Richter, C.A., Ruhlen, R.R., Nagel, S.C., Timms, B.G., and Welshons, W.V., 2005, The importance of appropriate controls, animal feed, and animal models in interpreting results from low-dose studies of bisphenol A: Birth Defects Research Part A: Clinical and Molecular Teratology, v. 73, no. 3, p. 140-145
vom Saal, F.S., Richter, C.A., Ruhlen, R.R., Nagel, S.C., and Welshons, W.V., 2004, Disruption of laboratory experiments due to leaching of Bisphenol A from polycarbonate cages and bottles and uncontrolled variability in components of animal feed, in National Research Council, ed., The Development of Science-based Guidelines for Laboratory Animal Care: Proceedings of the November 2003 International Workshop: The National Academies Press, p. 65-69.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Fishing, Hunting and Subsistence Living Integrated Science Team
The Fishing, Hunting, and Subsistence Living Integrated Science Team focuses on contaminant and pathogen exposures in the environment that could impact the presence and vitality of fish and wildlife populations that drive commercial, recreational and subsistence activities such as hunting and fishing. If actual risks are identified this project will inform how to economically and effectively...
Filter Total Items: 25
Effects of estrogens and atrazine on functional immune responses of largemouth bass (Micropterus salmoides) Effects of estrogens and atrazine on functional immune responses of largemouth bass (Micropterus salmoides)
Disease outbreaks, skin lesions, fish kill events, and reproductive abnormalities have been observed in wild populations of bass in the Chesapeake Bay watershed. Occurrence of synthetic and natural hormones from wastewater treatment plants and livestock operations, pesticides from agricultural lands, and phytoestrogens from cover crops have been implicated as potential causes of these...
Laboratory estimates of eDNA degradation rates for Actinionais ligamentina eDNA Laboratory estimates of eDNA degradation rates for Actinionais ligamentina eDNA
Data describe a designed environmental DNA (eDNA) experiment for the estimation of eDNA degradation rates for the mucket (Actinonaias ligamentina) from water samples collected in the laboratory. Samples were collected from experiments performed from November 01, 2019 to November 15, 2019 at the USGS Columbia Environmental Research Center, Missouri
Development and testing of a qPCR assay for Lampsilis siliquoidea eDNA Development and testing of a qPCR assay for Lampsilis siliquoidea eDNA
Data describe specificity and sensitivity testing for the L.sil2 assay. This assay is used to amplify eDNA from the freshwater mussel Lampsilis siliquoidea.
Environmental DNA shedding rates in laboratory conditions for Cumberlandia monodonta, Actinonaias ligamentina, and Lampsilis siliquoidea. Environmental DNA shedding rates in laboratory conditions for Cumberlandia monodonta, Actinonaias ligamentina, and Lampsilis siliquoidea.
Data describe designed environmental DNA (eDNA) experiments for the estimation of eDNA shedding rates for the spectaclecase (Cumberlandia monodonta), mucket (Actinonaias ligamentina), and fatmucket (Lampsilis siliquoidea) from water samples collected in the laboratory under differing laboratory conditions. Shedding rates were tested under variable mussel biomass, diet, and temperature...
Alternative complement pathway assay data for adult largemouth bass exposed in outdoor ponds to 17alpha-ethinylestradiol or an estrone-atrazine mixture Alternative complement pathway assay data for adult largemouth bass exposed in outdoor ponds to 17alpha-ethinylestradiol or an estrone-atrazine mixture
Alternative complement pathway assay data observed in adult largemouth bass plasma in response to an EE2 (17alpha-ethinylestradiol) or mixture of estrone and atrazine exposure under laboratory pond conditions, with associated fish identification information.
Water chemistry and molecular eDNA data observed in experimental laboratory mesocosms exposed to different nitrogen amendments in the presence or absence of a nitrifier enriched microbial community Water chemistry and molecular eDNA data observed in experimental laboratory mesocosms exposed to different nitrogen amendments in the presence or absence of a nitrifier enriched microbial community
Data describe the results of a controlled laboratory mesocosm experiment evaluating the influence of a nitrifier enriched microbial community on silver carp (Hypophthalmichthys molitrix) milt eDNA degradation. Parameters described include the concentration results, limit of detection, and limit of quantification of two silver carp specific quantitative PCR assays and water chemistry...
Filter Total Items: 49
First documentation of grass carp spawning in Lake Erie’s Central Basin First documentation of grass carp spawning in Lake Erie’s Central Basin
Grass carp (Ctenopharyngodon idella) are non-indigenous to North America having been translocated to the United States in the 1960s as a potential non-chemical solution for nuisance aquatic vegetation. Reproductively viable grass carp now exist in many watersheds in the United States. In the Great Lakes basin, grass carp were first discovered in the 1980s with direct confirmation of...
Authors
Corbin David Hilling, Adam J. Landry, James Roberts, Nathan Thompson, Cathy A. Richter, Ryan E. Brown, Christine M. Mayer, Song S. Qian
Immunomodulation in adult largemouth bass (Micropterus salmoides) exposed to a model estrogen or mixture of endocrine disrupting contaminants during early gonadal recrudescence Immunomodulation in adult largemouth bass (Micropterus salmoides) exposed to a model estrogen or mixture of endocrine disrupting contaminants during early gonadal recrudescence
Disease outbreaks, skin lesions, fish kill events, and reproductive abnormalities have been observed in wild populations of Centrarchids in watersheds throughout the United States. Occurrence of synthetic and natural hormones from wastewater treatment plants and livestock operations, pesticides from agricultural land use, and phytoestrogens have been implicated as potential causes of...
Authors
Jessica Kristin Leet, Catherine A. Richter, Rachel Claunch, Robert Gale, Donald E. Tillitt, Luke R. Iwanowicz
Evolutionary and ecological correlates of thiaminase in fishes Evolutionary and ecological correlates of thiaminase in fishes
Thiamine (vitamin B1) is required by all living organisms in multiple metabolic pathways. It is scarce in natural systems, and deficiency can lead to reproductive failure, neurological issues, and death. One major cause of thiamine deficiency is an overreliance on diet items containing the enzyme thiaminase. Thiaminase activity has been noted in many prey fishes and linked to cohort...
Authors
Freya Elizabeth Rowland, Cathy A. Richter, Donald E Tillitt, David Walters
Toward invasive mussel genetic biocontrol: Approaches, challenges, and perspectives Toward invasive mussel genetic biocontrol: Approaches, challenges, and perspectives
Invasive freshwater mussels, such as the zebra (Dreissena polymorpha), quagga (Dreissena rostriformis bugensis), and golden (Limnoperna fortunei) mussel have spread outside their native ranges throughout many regions of the North American, South American, and European continents in recent decades, damaging infrastructure and the environment. This review describes ongoing efforts by...
Authors
Victor H. Hernandez Elizarraga, Scott Ballantyne, Lindsey Gengelbach, Juliana A. Americo, Steven T. Suhr, Marie-Claude Senut, Ben Minerich, Christopher M. Merkes, Thea M. Edwards, Katy E. Klymus, Cathy A. Richter, Diane L. Waller, Yale J. Passamaneck, Mauro de F. Rebelo, Daryl M. Gohl
A nitrifier-enriched microbial community contributes to the degradation of environmental DNA A nitrifier-enriched microbial community contributes to the degradation of environmental DNA
Environmental DNA (eDNA) surveys are a promising alternative to traditional monitoring of invasive species, rare species, and biodiversity. Detecting organism-specific eDNA reduces the need to collect physical specimens for population estimates, and the high sensitivity of eDNA assays may improve detection of rare or cryptic species. However, correlating estimated concentrations of eDNA...
Authors
Rachelle Elaine Beattie, Caren C. Helbing, Jacob J. Imbery, Katy E. Klymus, Jonathan Lopez Duran, Cathy A. Richter, Anita A. Thambirajah, Nathan Thompson, Thea M. Edwards
When are environmental DNA early detections of invasive species actionable? When are environmental DNA early detections of invasive species actionable?
Environmental DNA (eDNA) sampling provides sensitive early detection capabilities for recently introduced taxa. However, natural resource managers struggle with how to integrate eDNA results into an early detection rapid response program because positive eDNA detections are not always indicative of an eventual infestation. We used a structured decision making (SDM) framework to evaluate
Authors
Adam Sepulveda, Christine E. Dumoulin, Denise L. Blanchette, John Mcphedran, Colin Holme, Nathan Whalen, Margaret Hunter, Christopher M. Merkes, Catherine A. Richter, Matthew Neilson, Wesley M. Daniel, Devin Nicole Jones-Slobodian, David R. Smith
Non-USGS Publications**
Taylor, J.A., Richter, C.A., Suzuki, A., Watanabe, H., Iguchi, T., Coser, K.R., Shioda, T., and vom Saal, F.S., 2012, Dose-related estrogen effects on gene expression in fetal mouse prostate mesenchymal cells: PLOS ONE, v. 7, no. 10, p. e48311
Taylor, J.A., Richter, C.A., Ruhlen, R.L., and vom Saal, F.S., 2011, Estrogenic environmental chemicals and drugs: Mechanisms for effects on the developing male urogenital system: The Journal of Steroid Biochemistry and Molecular Biology, v. 127, no. 1, p. 83-95
Richter, C.A., Taylor, J.A., Ruhlen, R.L., Welshons, W.V., and vom Saal, F.S., 2007, Estradiol and Bisphenol A stimulate androgen receptor and estrogen receptor gene expression in fetal mouse prostate mesenchyme cells: Environmental Health Perspectives, v. 115, no. 6, p. 902-908
vom Saal, F.S., Richter, C.A., Mao, J., and Welshons, W.V., 2005, Commercial animal feed: Variability in estrogenic activity and effects on body weight in mice: Birth Defects Research Part A: Clinical and Molecular Teratology, v. 73, no. 7, p. 474-475
Timms, B.G., Howdeshell, K.L., Barton, L., Bradley, S., Richter, C.A., and vom Saal, F.S., 2005, Estrogenic chemicals in plastic and oral contraceptives disrupt development of the fetal mouse prostate and urethra: Proceedings of the National Academy of Sciences of the United States of America, v. 102, no. 19, p. 7014-7019
Richter, C., Timms, B., and vom Saal, F., 2005, Prostate development: mechanisms for opposite effects of low and high doses of estrogenic chemicals, in Naz, R., ed., Endocrine Disruptors: Effects on Male and Female Reproductive Systems: New York, CRC Press, p. 379-410.
vom Saal, F.S., Richter, C.A., Ruhlen, R.R., Nagel, S.C., Timms, B.G., and Welshons, W.V., 2005, The importance of appropriate controls, animal feed, and animal models in interpreting results from low-dose studies of bisphenol A: Birth Defects Research Part A: Clinical and Molecular Teratology, v. 73, no. 3, p. 140-145
vom Saal, F.S., Richter, C.A., Ruhlen, R.R., Nagel, S.C., and Welshons, W.V., 2004, Disruption of laboratory experiments due to leaching of Bisphenol A from polycarbonate cages and bottles and uncontrolled variability in components of animal feed, in National Research Council, ed., The Development of Science-based Guidelines for Laboratory Animal Care: Proceedings of the November 2003 International Workshop: The National Academies Press, p. 65-69.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.