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Jill Jenkins, Ph.D.

Jill Jenkins is a Research Microbiologist at the USGS Wetland and Aquatic Research Center. 

Jill Jenkins’ efforts emphasize the study of potential impacts of environmental stressors at the cellular and molecular levels. Her major areas of focus include biomarker development, endocrine disruption, genetics, and comparative immunology.  Key laboratory biotechnologies she uses are photomicroscopy and flow cytometry.  Primary cell types studied are blood and spermatozoa, and assays are tailored to the particular species requirements and hypotheses being addressed. 

Jenkins specializes in the development and application of biomarkers; these are measures of variables that respond in quantifiable ways to changes in the environment.  The choice of particular biomarkers at specific biological levels of organization (such as genetic, cellular, tissue, hormonal, and organismal levels) depends on the study at hand.  Because molecular and biochemical responses of cells are preceded by chemical changes in nuclei, cytoplasm, membranes, and extracellular fluids, these responses can be diagnostic and contribute to an assessment of ecosystem health.

BACKGROUND

1991-1992: Postdoctoral Res.;  Reproductive Genetics Labs, Dept. of Obstetrics and Gynecology, Univ. of TN, with Stephen Wachtel

Education and Certifications

  • Ph.D., Microbiology, Memphis State University, 1991

    M.S., Microbiology and Biochemistry, Idaho State University, 1985

    B.S., Biology, Rochester Institute of Technology, 1981

Science and Products

Filter Total Items: 15
Microcystin

Detecting Sublethal Effects of Harmful Algal Blooms in Mammalian and Avian Cells

USGS Researchers are collaborating to study avian and mammalian cells to detect sublethal toxin effects following exposure to harmful algal blooms.
By
Biological Threats and Invasive Species Research Program, Lower Mississippi-Gulf Water Science Center, National Wildlife Health Center, Wetland and Aquatic Research Center
Detecting Sublethal Effects of Harmful Algal Blooms in Mammalian and Avian Cells

Detecting Sublethal Effects of Harmful Algal Blooms in Mammalian and Avian Cells

USGS Researchers are collaborating to study avian and mammalian cells to detect sublethal toxin effects following exposure to harmful algal blooms.
Learn More
Antimycin A structure

Comparative Freshwater Fish Toxicity Testing of Antimycin A

Researchers are investigating the influence of Antimycin A on invasive carp and non-target fishes by measuring the effects of a novel species-specific bait formulation.
By
Ecosystems Mission Area, Biological Threats and Invasive Species Research Program, Species Management Research Program, Columbia Environmental Research Center, Wetland and Aquatic Research Center
Comparative Freshwater Fish Toxicity Testing of Antimycin A

Comparative Freshwater Fish Toxicity Testing of Antimycin A

Researchers are investigating the influence of Antimycin A on invasive carp and non-target fishes by measuring the effects of a novel species-specific bait formulation.
Learn More
Figure 1. Largemouth bass, Micropterus salmoides.

Computer-Assisted Sperm Motion Analysis in Measuring Reproductive Effects in Bass

The objective of this research is to assess the sensitivity of female and male LMB reproductive capabilities at the time of year when they are physiologically preparing for spawning season (also known as gonad recrudescence).
By
Ecosystems Mission Area, Species Management Research Program, Wetland and Aquatic Research Center
Computer-Assisted Sperm Motion Analysis in Measuring Reproductive Effects in Bass

Computer-Assisted Sperm Motion Analysis in Measuring Reproductive Effects in Bass

The objective of this research is to assess the sensitivity of female and male LMB reproductive capabilities at the time of year when they are physiologically preparing for spawning season (also known as gonad recrudescence).
Learn More
Figure 2. Hatchling American kestrels

Studying Immune Responses in the American Kestrel (Falco sparverius)

The objectives of this study are to (1) investigate whether the immune system will respond to chemical stressors, such as new flame retardant compounds, and (2) determine if such chemical stressors influence white blood cells (WBC) responses after exposure to a viral pathogen mimicking bird flu.
By
Ecosystems Mission Area, Species Management Research Program, Wetland and Aquatic Research Center
Studying Immune Responses in the American Kestrel (Falco sparverius)

Studying Immune Responses in the American Kestrel (Falco sparverius)

The objectives of this study are to (1) investigate whether the immune system will respond to chemical stressors, such as new flame retardant compounds, and (2) determine if such chemical stressors influence white blood cells (WBC) responses after exposure to a viral pathogen mimicking bird flu.
Learn More
Figure 1. The Buffalo National River in Arkansas

Detecting Differences in Bacterial Metabolism in the Buffalo National River

Each year, the Buffalo National River (BUFF) attracts 1.6 million visitors, many of whom enjoy recreational water activities. Since 2013, a confined animal feeding operation (CAFO) for swine has been operating on Big Creek, a BUFF tributary.
By
Contaminant Biology, Wetland and Aquatic Research Center
Detecting Differences in Bacterial Metabolism in the Buffalo National River

Detecting Differences in Bacterial Metabolism in the Buffalo National River

Each year, the Buffalo National River (BUFF) attracts 1.6 million visitors, many of whom enjoy recreational water activities. Since 2013, a confined animal feeding operation (CAFO) for swine has been operating on Big Creek, a BUFF tributary.
Learn More
Fig. 1. A flow cytometric histogram of larval Grass Carp cells

A Website Tool for Predicting Triploidy in Larval Fish Spawns

Differentiating diploids from triploids at the earliest life stage possible allows for a more efficient use of resources including production time and rearing space. Thus, a reliable flow cytometric (FCM) method has been developed to discriminate triploids from diploids at the larval stage. In order to help simplify the process of differentiating triploids from diploids, we propose a simple...
By
Ecosystems Mission Area, Species Management Research Program, Wetland and Aquatic Research Center
A Website Tool for Predicting Triploidy in Larval Fish Spawns

A Website Tool for Predicting Triploidy in Larval Fish Spawns

Differentiating diploids from triploids at the earliest life stage possible allows for a more efficient use of resources including production time and rearing space. Thus, a reliable flow cytometric (FCM) method has been developed to discriminate triploids from diploids at the larval stage. In order to help simplify the process of differentiating triploids from diploids, we propose a simple...
Learn More
Filter Total Items: 18

Motility of sperm from adult largemouth bass pond exposure to 17 alpha-ethinylestradiol or estrone-atrazine mixture (2018) Motility of sperm from adult largemouth bass pond exposure to 17 alpha-ethinylestradiol or estrone-atrazine mixture (2018)

Adult largemouth bass have been shown to be sensitive to induction of intersex in response to chronic estrogen exposures over a complete reproductive cycle. Late summer to fall is the period of early gonad recrudescence when spermatogenesis is beginning in preparation for the spawning season in the spring. Our objective was to assess in 2018 whether early gonad recrudescence was a period...
By
Chesapeake Bay Activities, Wetland and Aquatic Research Center

Microchemistry demographics and development data from wild caught black carp in the Mississippi River basin, 2011-18 Microchemistry demographics and development data from wild caught black carp in the Mississippi River basin, 2011-18

Data consists of ploidy, otolith stable isotope analysis and microchemistry, age, weight, sex, length and geolocation data from wild caught black carp (Mylopharyngodon piceus) captured in the Mississippi River basin from 2011 through 2018.
By
Columbia Environmental Research Center

Biomarkers of laboratory-exposed Northern Leopard frogs to neonicotinoids: DNA cell cycle, fragmentation, and genome size Biomarkers of laboratory-exposed Northern Leopard frogs to neonicotinoids: DNA cell cycle, fragmentation, and genome size

Data were collected on whole blood DNA parameters including cell cycle, DNA fragmentation, and genome size obtained from Northern leopard frogs exposed to neonicotinoid insecticides in the laboratory. Data consist of flow cytometry files that were generated in the analysis of the frog blood.
By
National Innovation Center, Wetland and Aquatic Research Center

Serum osmolality, cortisol, and protein in laboratory common carp (Cyprinus carpio) Serum osmolality, cortisol, and protein in laboratory common carp (Cyprinus carpio)

Common carp were placed into three treatment groups based on levels of induced stress in the laboratory setting. Measurements of common carp blood serum cortisol and serum protein were collected by spectrophotometry. Additionally, serum osmolality measurements were obtained by vapor pressure osmometry. Fish weights were taken at the time of blood collection.
By
Wetland and Aquatic Research Center

Laboratory analysis assessing immune response after flame retardant exposure in American kestrels, Falco sparverius, through 21 days post-hatch Laboratory analysis assessing immune response after flame retardant exposure in American kestrels, Falco sparverius, through 21 days post-hatch

Laboratory analysis of innate American kestrel, Falco sparverius, immune response after exposure to flame retardant, isopropylphenyl phosphate (ITP) through 21 days post hatch. Data consist of flow cytometry files that were generated in the analysis of white blood cells from kestrel blood. Thus, data are in standard format that allows files created by one type of acquisition hardware and...
By
Ecosystems Mission Area, Contaminant Biology, Environmental Health Program, Toxic Substances Hydrology, Wetland and Aquatic Research Center

Characteristics of Bacteria and Water Quality along the Buffalo National River 2017-2018 Characteristics of Bacteria and Water Quality along the Buffalo National River 2017-2018

A National Park Service Partnership Program project was conducted in 2017 - 2019 on water quality parameters up-stream and downstream of a confined animal feeding operation on a Buffalo National River tributary (Big Creek). Monthly, over a period of 20 months, patterns of nutrients in water (nitrogen and phosphorus), periphyton (chlorophyll a and algal assemblages), and bacterial...
By
Wetland and Aquatic Research Center
No results found.
Filter Total Items: 72

Declines in reproductive condition of male largemouth bass (Micropterus salmoides) following seasonal exposure to estrogenic endocrine-disrupting compounds Declines in reproductive condition of male largemouth bass (Micropterus salmoides) following seasonal exposure to estrogenic endocrine-disrupting compounds

Reproductive abnormalities, that could lead to possible effects at the population level, have been observed in wild fish throughout the United States, with high prevalence in largemouth bass (LMB; Micropterus salmoides) and smallmouth bass (Micropterus dolomieu). Estrone (E1) and atrazine (ATR) are common environmental contaminants often associated with agricultural land use. 17alpha
Authors
Jessica Kristin Leet, Cathy A. Richter, Robert Gale, Donald E. Tillitt, Jill Jenkins
By
Ecosystems Mission Area, Columbia Environmental Research Center, Wetland and Aquatic Research Center

Establishment of invasive Black Carp (Mylopharyngodon piceus) in the Mississippi River basin: Identifying sources and year classes contributing to recruitment Establishment of invasive Black Carp (Mylopharyngodon piceus) in the Mississippi River basin: Identifying sources and year classes contributing to recruitment

Black Carp (Mylopharyngodon piceus) was imported to the USA to control aquaculture pond snails. This species has escaped captivity and occurs in parts of the Mississippi River, several tributaries, and floodplain lakes, which is concerning due to potential competition with native fishes and predation on native mussels, many of which are imperiled. However, Black Carp captures have...
Authors
Gregory W. Whitledge, Patrick T. Kroboth, Duane Chapman, Quinton E. Phelps, Wesley Sleeper, Jennifer Bailey, Jill Jenkins
By
Ecosystems Mission Area, Columbia Environmental Research Center, Great Lakes Science Center, Wetland and Aquatic Research Center

Juvenile African clawed frogs (Xenopus laevis) express growth, metamorphosis, mortality, gene expression, and metabolic changes when exposed to thiamethoxam and clothianidin Juvenile African clawed frogs (Xenopus laevis) express growth, metamorphosis, mortality, gene expression, and metabolic changes when exposed to thiamethoxam and clothianidin

Neonicotinoids (NEO) represent the main class of insecticides currently in use, with thiamethoxam (THX) and clothianidin (CLO) primarily applied agriculturally. With few comprehensive studies having been performed with non-target amphibians, the aim was to investigate potential biomarker responses along an adverse outcome pathway of NEO exposure, whereby data were collected on multiple...
Authors
Jill Jenkins, Katherine R. Hartop, Ghadeer Bukhari, Debra E. Howton, Kelly L. Smalling, Scott Mize, Michelle L. Hladik, Darren Johnson, Rassa Dale, Bonnie L. Brown
By
Water Resources Mission Area, Ecosystems Mission Area, California Water Science Center, New Jersey Water Science Center, Wetland and Aquatic Research Center

Establishment of baseline cytology metrics in nestling American kestrels (Falco sparverius): Immunomodulatory effects of the flame retardant isopropylated triarylphosphate isomers Establishment of baseline cytology metrics in nestling American kestrels (Falco sparverius): Immunomodulatory effects of the flame retardant isopropylated triarylphosphate isomers

Avian populations must mount effective immune responses upon exposure to environmental stressors such as avian influenza and xenobiotics. Although multiple immune assays have been tested and applied to various avian species, antibody-mediated immune responses in non-model avian species are not commonly reported due to the lack of commercially available species-specific antibodies. The...
Authors
Jill Jenkins, Brooke A Baudoin, Darren Johnson, Kim J. Fernie, Heather M. Stapelton, Natalie Karouna-Renier
By
Ecosystems Mission Area, Contaminant Biology, Environmental Health Program, Toxic Substances Hydrology, Wetland and Aquatic Research Center

Production of haploid gynogens to inform genomic resource development in the paleotetraploid pallid sturgeon (Scaphirhynchus albus) Production of haploid gynogens to inform genomic resource development in the paleotetraploid pallid sturgeon (Scaphirhynchus albus)

Order Acipenseriformes (sturgeons and paddlefishes) is an ancient lineage of osteichthyan fishes (>200 million years old) with most extant species at conservation risk. A relatively basal species, the pallid sturgeon, Scaphirhynchus albus, is a federally endangered species native to the Mississippi and Missouri River basins. Hybridization with sympatric shovelnose sturgeon, S...
Authors
Richard Flamio Jr., Kimberly Chojnacki, Aaron J. DeLonay, Marlene J Dodson, Rachel M. Gocker, Jill Jenkins, Jeffrey Powell, Edward J. Heist
By
Ecosystems Mission Area, Columbia Environmental Research Center, Wetland and Aquatic Research Center

Establishing genome sizes of focal fishery and aquaculture species along Baja California, Mexico Establishing genome sizes of focal fishery and aquaculture species along Baja California, Mexico

Genome size—the total haploid content of nuclear DNA— is constant in all cells in individuals within a species, but differs among species. Consequently, the genome size is a quantifiable genetic signature that not only characterizes a species, but it can reflect chromatin modifications, which play fundamental roles in most biological processes that are involved in the manipulation and...
Authors
Constanza del Mar Ochoa-Saloma, Jill A. Jenkins, Manuel A. Segovia, Miguel A. Del Rio-Portilla, Carmen G. Paniagua-Chavez
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

Non-USGS Publications**

Jenkins, J.A. and D.D. Ourth. 1990. Membrane damage to Escherichia coli and bactericidal kinetics by the alternative complement pathway of channel catfish. Comparative Biochemisty and Physiology, 97B:477-481. http://www.ncbi.nlm.nih.gov/pubmed/2286064

**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

Filter Total Items: 15
Microcystin

Detecting Sublethal Effects of Harmful Algal Blooms in Mammalian and Avian Cells

USGS Researchers are collaborating to study avian and mammalian cells to detect sublethal toxin effects following exposure to harmful algal blooms.
By
Biological Threats and Invasive Species Research Program, Lower Mississippi-Gulf Water Science Center, National Wildlife Health Center, Wetland and Aquatic Research Center
Detecting Sublethal Effects of Harmful Algal Blooms in Mammalian and Avian Cells

Detecting Sublethal Effects of Harmful Algal Blooms in Mammalian and Avian Cells

USGS Researchers are collaborating to study avian and mammalian cells to detect sublethal toxin effects following exposure to harmful algal blooms.
Learn More
Antimycin A structure

Comparative Freshwater Fish Toxicity Testing of Antimycin A

Researchers are investigating the influence of Antimycin A on invasive carp and non-target fishes by measuring the effects of a novel species-specific bait formulation.
By
Ecosystems Mission Area, Biological Threats and Invasive Species Research Program, Species Management Research Program, Columbia Environmental Research Center, Wetland and Aquatic Research Center
Comparative Freshwater Fish Toxicity Testing of Antimycin A

Comparative Freshwater Fish Toxicity Testing of Antimycin A

Researchers are investigating the influence of Antimycin A on invasive carp and non-target fishes by measuring the effects of a novel species-specific bait formulation.
Learn More
Figure 1. Largemouth bass, Micropterus salmoides.

Computer-Assisted Sperm Motion Analysis in Measuring Reproductive Effects in Bass

The objective of this research is to assess the sensitivity of female and male LMB reproductive capabilities at the time of year when they are physiologically preparing for spawning season (also known as gonad recrudescence).
By
Ecosystems Mission Area, Species Management Research Program, Wetland and Aquatic Research Center
Computer-Assisted Sperm Motion Analysis in Measuring Reproductive Effects in Bass

Computer-Assisted Sperm Motion Analysis in Measuring Reproductive Effects in Bass

The objective of this research is to assess the sensitivity of female and male LMB reproductive capabilities at the time of year when they are physiologically preparing for spawning season (also known as gonad recrudescence).
Learn More
Figure 2. Hatchling American kestrels

Studying Immune Responses in the American Kestrel (Falco sparverius)

The objectives of this study are to (1) investigate whether the immune system will respond to chemical stressors, such as new flame retardant compounds, and (2) determine if such chemical stressors influence white blood cells (WBC) responses after exposure to a viral pathogen mimicking bird flu.
By
Ecosystems Mission Area, Species Management Research Program, Wetland and Aquatic Research Center
Studying Immune Responses in the American Kestrel (Falco sparverius)

Studying Immune Responses in the American Kestrel (Falco sparverius)

The objectives of this study are to (1) investigate whether the immune system will respond to chemical stressors, such as new flame retardant compounds, and (2) determine if such chemical stressors influence white blood cells (WBC) responses after exposure to a viral pathogen mimicking bird flu.
Learn More
Figure 1. The Buffalo National River in Arkansas

Detecting Differences in Bacterial Metabolism in the Buffalo National River

Each year, the Buffalo National River (BUFF) attracts 1.6 million visitors, many of whom enjoy recreational water activities. Since 2013, a confined animal feeding operation (CAFO) for swine has been operating on Big Creek, a BUFF tributary.
By
Contaminant Biology, Wetland and Aquatic Research Center
Detecting Differences in Bacterial Metabolism in the Buffalo National River

Detecting Differences in Bacterial Metabolism in the Buffalo National River

Each year, the Buffalo National River (BUFF) attracts 1.6 million visitors, many of whom enjoy recreational water activities. Since 2013, a confined animal feeding operation (CAFO) for swine has been operating on Big Creek, a BUFF tributary.
Learn More
Fig. 1. A flow cytometric histogram of larval Grass Carp cells

A Website Tool for Predicting Triploidy in Larval Fish Spawns

Differentiating diploids from triploids at the earliest life stage possible allows for a more efficient use of resources including production time and rearing space. Thus, a reliable flow cytometric (FCM) method has been developed to discriminate triploids from diploids at the larval stage. In order to help simplify the process of differentiating triploids from diploids, we propose a simple...
By
Ecosystems Mission Area, Species Management Research Program, Wetland and Aquatic Research Center
A Website Tool for Predicting Triploidy in Larval Fish Spawns

A Website Tool for Predicting Triploidy in Larval Fish Spawns

Differentiating diploids from triploids at the earliest life stage possible allows for a more efficient use of resources including production time and rearing space. Thus, a reliable flow cytometric (FCM) method has been developed to discriminate triploids from diploids at the larval stage. In order to help simplify the process of differentiating triploids from diploids, we propose a simple...
Learn More
Filter Total Items: 18

Motility of sperm from adult largemouth bass pond exposure to 17 alpha-ethinylestradiol or estrone-atrazine mixture (2018) Motility of sperm from adult largemouth bass pond exposure to 17 alpha-ethinylestradiol or estrone-atrazine mixture (2018)

Adult largemouth bass have been shown to be sensitive to induction of intersex in response to chronic estrogen exposures over a complete reproductive cycle. Late summer to fall is the period of early gonad recrudescence when spermatogenesis is beginning in preparation for the spawning season in the spring. Our objective was to assess in 2018 whether early gonad recrudescence was a period...
By
Chesapeake Bay Activities, Wetland and Aquatic Research Center

Microchemistry demographics and development data from wild caught black carp in the Mississippi River basin, 2011-18 Microchemistry demographics and development data from wild caught black carp in the Mississippi River basin, 2011-18

Data consists of ploidy, otolith stable isotope analysis and microchemistry, age, weight, sex, length and geolocation data from wild caught black carp (Mylopharyngodon piceus) captured in the Mississippi River basin from 2011 through 2018.
By
Columbia Environmental Research Center

Biomarkers of laboratory-exposed Northern Leopard frogs to neonicotinoids: DNA cell cycle, fragmentation, and genome size Biomarkers of laboratory-exposed Northern Leopard frogs to neonicotinoids: DNA cell cycle, fragmentation, and genome size

Data were collected on whole blood DNA parameters including cell cycle, DNA fragmentation, and genome size obtained from Northern leopard frogs exposed to neonicotinoid insecticides in the laboratory. Data consist of flow cytometry files that were generated in the analysis of the frog blood.
By
National Innovation Center, Wetland and Aquatic Research Center

Serum osmolality, cortisol, and protein in laboratory common carp (Cyprinus carpio) Serum osmolality, cortisol, and protein in laboratory common carp (Cyprinus carpio)

Common carp were placed into three treatment groups based on levels of induced stress in the laboratory setting. Measurements of common carp blood serum cortisol and serum protein were collected by spectrophotometry. Additionally, serum osmolality measurements were obtained by vapor pressure osmometry. Fish weights were taken at the time of blood collection.
By
Wetland and Aquatic Research Center

Laboratory analysis assessing immune response after flame retardant exposure in American kestrels, Falco sparverius, through 21 days post-hatch Laboratory analysis assessing immune response after flame retardant exposure in American kestrels, Falco sparverius, through 21 days post-hatch

Laboratory analysis of innate American kestrel, Falco sparverius, immune response after exposure to flame retardant, isopropylphenyl phosphate (ITP) through 21 days post hatch. Data consist of flow cytometry files that were generated in the analysis of white blood cells from kestrel blood. Thus, data are in standard format that allows files created by one type of acquisition hardware and...
By
Ecosystems Mission Area, Contaminant Biology, Environmental Health Program, Toxic Substances Hydrology, Wetland and Aquatic Research Center

Characteristics of Bacteria and Water Quality along the Buffalo National River 2017-2018 Characteristics of Bacteria and Water Quality along the Buffalo National River 2017-2018

A National Park Service Partnership Program project was conducted in 2017 - 2019 on water quality parameters up-stream and downstream of a confined animal feeding operation on a Buffalo National River tributary (Big Creek). Monthly, over a period of 20 months, patterns of nutrients in water (nitrogen and phosphorus), periphyton (chlorophyll a and algal assemblages), and bacterial...
By
Wetland and Aquatic Research Center
No results found.
Filter Total Items: 72

Declines in reproductive condition of male largemouth bass (Micropterus salmoides) following seasonal exposure to estrogenic endocrine-disrupting compounds Declines in reproductive condition of male largemouth bass (Micropterus salmoides) following seasonal exposure to estrogenic endocrine-disrupting compounds

Reproductive abnormalities, that could lead to possible effects at the population level, have been observed in wild fish throughout the United States, with high prevalence in largemouth bass (LMB; Micropterus salmoides) and smallmouth bass (Micropterus dolomieu). Estrone (E1) and atrazine (ATR) are common environmental contaminants often associated with agricultural land use. 17alpha
Authors
Jessica Kristin Leet, Cathy A. Richter, Robert Gale, Donald E. Tillitt, Jill Jenkins
By
Ecosystems Mission Area, Columbia Environmental Research Center, Wetland and Aquatic Research Center

Establishment of invasive Black Carp (Mylopharyngodon piceus) in the Mississippi River basin: Identifying sources and year classes contributing to recruitment Establishment of invasive Black Carp (Mylopharyngodon piceus) in the Mississippi River basin: Identifying sources and year classes contributing to recruitment

Black Carp (Mylopharyngodon piceus) was imported to the USA to control aquaculture pond snails. This species has escaped captivity and occurs in parts of the Mississippi River, several tributaries, and floodplain lakes, which is concerning due to potential competition with native fishes and predation on native mussels, many of which are imperiled. However, Black Carp captures have...
Authors
Gregory W. Whitledge, Patrick T. Kroboth, Duane Chapman, Quinton E. Phelps, Wesley Sleeper, Jennifer Bailey, Jill Jenkins
By
Ecosystems Mission Area, Columbia Environmental Research Center, Great Lakes Science Center, Wetland and Aquatic Research Center

Juvenile African clawed frogs (Xenopus laevis) express growth, metamorphosis, mortality, gene expression, and metabolic changes when exposed to thiamethoxam and clothianidin Juvenile African clawed frogs (Xenopus laevis) express growth, metamorphosis, mortality, gene expression, and metabolic changes when exposed to thiamethoxam and clothianidin

Neonicotinoids (NEO) represent the main class of insecticides currently in use, with thiamethoxam (THX) and clothianidin (CLO) primarily applied agriculturally. With few comprehensive studies having been performed with non-target amphibians, the aim was to investigate potential biomarker responses along an adverse outcome pathway of NEO exposure, whereby data were collected on multiple...
Authors
Jill Jenkins, Katherine R. Hartop, Ghadeer Bukhari, Debra E. Howton, Kelly L. Smalling, Scott Mize, Michelle L. Hladik, Darren Johnson, Rassa Dale, Bonnie L. Brown
By
Water Resources Mission Area, Ecosystems Mission Area, California Water Science Center, New Jersey Water Science Center, Wetland and Aquatic Research Center

Establishment of baseline cytology metrics in nestling American kestrels (Falco sparverius): Immunomodulatory effects of the flame retardant isopropylated triarylphosphate isomers Establishment of baseline cytology metrics in nestling American kestrels (Falco sparverius): Immunomodulatory effects of the flame retardant isopropylated triarylphosphate isomers

Avian populations must mount effective immune responses upon exposure to environmental stressors such as avian influenza and xenobiotics. Although multiple immune assays have been tested and applied to various avian species, antibody-mediated immune responses in non-model avian species are not commonly reported due to the lack of commercially available species-specific antibodies. The...
Authors
Jill Jenkins, Brooke A Baudoin, Darren Johnson, Kim J. Fernie, Heather M. Stapelton, Natalie Karouna-Renier
By
Ecosystems Mission Area, Contaminant Biology, Environmental Health Program, Toxic Substances Hydrology, Wetland and Aquatic Research Center

Production of haploid gynogens to inform genomic resource development in the paleotetraploid pallid sturgeon (Scaphirhynchus albus) Production of haploid gynogens to inform genomic resource development in the paleotetraploid pallid sturgeon (Scaphirhynchus albus)

Order Acipenseriformes (sturgeons and paddlefishes) is an ancient lineage of osteichthyan fishes (>200 million years old) with most extant species at conservation risk. A relatively basal species, the pallid sturgeon, Scaphirhynchus albus, is a federally endangered species native to the Mississippi and Missouri River basins. Hybridization with sympatric shovelnose sturgeon, S...
Authors
Richard Flamio Jr., Kimberly Chojnacki, Aaron J. DeLonay, Marlene J Dodson, Rachel M. Gocker, Jill Jenkins, Jeffrey Powell, Edward J. Heist
By
Ecosystems Mission Area, Columbia Environmental Research Center, Wetland and Aquatic Research Center

Establishing genome sizes of focal fishery and aquaculture species along Baja California, Mexico Establishing genome sizes of focal fishery and aquaculture species along Baja California, Mexico

Genome size—the total haploid content of nuclear DNA— is constant in all cells in individuals within a species, but differs among species. Consequently, the genome size is a quantifiable genetic signature that not only characterizes a species, but it can reflect chromatin modifications, which play fundamental roles in most biological processes that are involved in the manipulation and...
Authors
Constanza del Mar Ochoa-Saloma, Jill A. Jenkins, Manuel A. Segovia, Miguel A. Del Rio-Portilla, Carmen G. Paniagua-Chavez
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

Non-USGS Publications**

Jenkins, J.A. and D.D. Ourth. 1990. Membrane damage to Escherichia coli and bactericidal kinetics by the alternative complement pathway of channel catfish. Comparative Biochemisty and Physiology, 97B:477-481. http://www.ncbi.nlm.nih.gov/pubmed/2286064

**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.

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