Eosin-nigrosin staining of spermatozoa from common carp (Cyprinus carpio) testes collected from the Lake Mead National Recreation Area, Nevada
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
Laboratory Investigations with Fish Species to Assist with Implementing Barataria-Terrebonne National Estuary Program’s Ecological Management Action Plans
Photomicroscopy and Flow Cytometry Core Technology Team
Outlining Potential Health Effects of Exposure to Critical Elements: From Chemical Structure to Adverse Outcome Pathways
Detecting Sublethal Effects of Harmful Algal Blooms in Mammalian and Avian Cells
Comparative Freshwater Fish Toxicity Testing of Antimycin A
Computer-Assisted Sperm Motion Analysis in Measuring Reproductive Effects in Bass
Studying Immune Responses in the American Kestrel (Falco sparverius)
Detecting Differences in Bacterial Metabolism in the Buffalo National River
A Website Tool for Predicting Triploidy in Larval Fish Spawns
Flow Cytometry Applied to the Animal Kingdom in Studies of Natural Resource Science
Determining the Ploidy and Resultant Reproductive Capability of Artificially Spawned and Wild Caught Asian Carp
Pollinator Germplasm as a Genetic Resource for Conservation
Motility of sperm from adult largemouth bass pond exposure to 17 alpha-ethinylestradiol or estrone-atrazine mixture (2018)
Microchemistry demographics and development data from wild caught black carp in the Mississippi River basin, 2011-18
Biomarkers of laboratory-exposed Northern Leopard frogs to neonicotinoids: DNA cell cycle, fragmentation, and genome size
Serum osmolality, cortisol, and protein in laboratory common carp (Cyprinus carpio)
Laboratory analysis assessing immune response after flame retardant exposure in American kestrels, Falco sparverius, through 21 days post-hatch
Characteristics of Bacteria and Water Quality along the Buffalo National River 2017-2018
Xenopus metamorphosis after neonicotinoid exposure
Discerning innate immunity in American kestrels, Falco sparverius, through 21 days post-hatch
Gene expression and liver cell metabolism from Xenopus laevis tadpoles exposed to neonicotinoids
Ploidy and genome size estimates of artificially produced larval pallid sturgeon, Scaphirhynchus albus
Establishing a standard ploidy assessment method using grass carp from Ohio, 2015-2016
Sperm quality biomarkers complement reproductive and endocrine parameters in investigating environmental contaminants in common carp (Cyprinus carpio) from the Lake Mead National Recreation Area (1999-2006)
Eosin-nigrosin staining of spermatozoa from common carp (Cyprinus carpio) testes collected from the Lake Mead National Recreation Area, Nevada
Microscopic video imaging is used for computerized analysis of sperm motility parameters
Microscopic video imaging is used for computerized analysis of sperm motility parameters
Flow cytometric assessments of metabolic activity in bacterial assemblages provide insight into ecosystem condition along the Buffalo National River, Arkansas
Amino acid variation at the mitochondrial binding site of Antimycin A is proposed to reflect sensitivity and toxicity differences among fish species
Outlining potential biomarkers of exposure and effect to critical minerals: Nutritionally essential trace elements and the rare earth elements
Declines in reproductive condition of male largemouth bass (Micropterus salmoides) following seasonal exposure to estrogenic endocrine-disrupting compounds
Establishment of invasive Black Carp (Mylopharyngodon piceus) in the Mississippi River basin: Identifying sources and year classes contributing to recruitment
Juvenile African clawed frogs (Xenopus laevis) express growth, metamorphosis, mortality, gene expression, and metabolic changes when exposed to thiamethoxam and clothianidin
Establishment of baseline cytology metrics in nestling American kestrels (Falco sparverius): Immunomodulatory effects of the flame retardant isopropylated triarylphosphate isomers
Production of haploid gynogens to inform genomic resource development in the paleotetraploid pallid sturgeon (Scaphirhynchus albus)
Establishing genome sizes of focal fishery and aquaculture species along Baja California, Mexico
Defensible standardized ploidy assessments for Grass Carp (Ctenopharyngodon idella, Cyprinidae) intercepted from the commercial supply chain
Assessing the risk of diploid grass carp Ctenopharyngodon idella in the certified triploid supply chain in Ohio
Sperm quality biomarkers complement reproductive and endocrine parameters in investigating environmental contaminants in common carp (Cyprinus carpio) from the Lake Mead National Recreation Area
Non-USGS Publications**
**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
Laboratory Investigations with Fish Species to Assist with Implementing Barataria-Terrebonne National Estuary Program’s Ecological Management Action Plans
Photomicroscopy and Flow Cytometry Core Technology Team
Outlining Potential Health Effects of Exposure to Critical Elements: From Chemical Structure to Adverse Outcome Pathways
Detecting Sublethal Effects of Harmful Algal Blooms in Mammalian and Avian Cells
Comparative Freshwater Fish Toxicity Testing of Antimycin A
Computer-Assisted Sperm Motion Analysis in Measuring Reproductive Effects in Bass
Studying Immune Responses in the American Kestrel (Falco sparverius)
Detecting Differences in Bacterial Metabolism in the Buffalo National River
A Website Tool for Predicting Triploidy in Larval Fish Spawns
Flow Cytometry Applied to the Animal Kingdom in Studies of Natural Resource Science
Determining the Ploidy and Resultant Reproductive Capability of Artificially Spawned and Wild Caught Asian Carp
Pollinator Germplasm as a Genetic Resource for Conservation
Motility of sperm from adult largemouth bass pond exposure to 17 alpha-ethinylestradiol or estrone-atrazine mixture (2018)
Microchemistry demographics and development data from wild caught black carp in the Mississippi River basin, 2011-18
Biomarkers of laboratory-exposed Northern Leopard frogs to neonicotinoids: DNA cell cycle, fragmentation, and genome size
Serum osmolality, cortisol, and protein in laboratory common carp (Cyprinus carpio)
Laboratory analysis assessing immune response after flame retardant exposure in American kestrels, Falco sparverius, through 21 days post-hatch
Characteristics of Bacteria and Water Quality along the Buffalo National River 2017-2018
Xenopus metamorphosis after neonicotinoid exposure
Discerning innate immunity in American kestrels, Falco sparverius, through 21 days post-hatch
Gene expression and liver cell metabolism from Xenopus laevis tadpoles exposed to neonicotinoids
Ploidy and genome size estimates of artificially produced larval pallid sturgeon, Scaphirhynchus albus
Establishing a standard ploidy assessment method using grass carp from Ohio, 2015-2016
Sperm quality biomarkers complement reproductive and endocrine parameters in investigating environmental contaminants in common carp (Cyprinus carpio) from the Lake Mead National Recreation Area (1999-2006)
Eosin-nigrosin staining of spermatozoa from common carp (Cyprinus carpio) testes collected from the Lake Mead National Recreation Area, Nevada
Eosin-nigrosin staining of spermatozoa from common carp (Cyprinus carpio) testes collected from the Lake Mead National Recreation Area, Nevada
Microscopic video imaging is used for computerized analysis of sperm motility parameters
Microscopic video imaging is used for computerized analysis of sperm motility parameters
Flow cytometric assessments of metabolic activity in bacterial assemblages provide insight into ecosystem condition along the Buffalo National River, Arkansas
Amino acid variation at the mitochondrial binding site of Antimycin A is proposed to reflect sensitivity and toxicity differences among fish species
Outlining potential biomarkers of exposure and effect to critical minerals: Nutritionally essential trace elements and the rare earth elements
Declines in reproductive condition of male largemouth bass (Micropterus salmoides) following seasonal exposure to estrogenic endocrine-disrupting compounds
Establishment of invasive Black Carp (Mylopharyngodon piceus) in the Mississippi River basin: Identifying sources and year classes contributing to recruitment
Juvenile African clawed frogs (Xenopus laevis) express growth, metamorphosis, mortality, gene expression, and metabolic changes when exposed to thiamethoxam and clothianidin
Establishment of baseline cytology metrics in nestling American kestrels (Falco sparverius): Immunomodulatory effects of the flame retardant isopropylated triarylphosphate isomers
Production of haploid gynogens to inform genomic resource development in the paleotetraploid pallid sturgeon (Scaphirhynchus albus)
Establishing genome sizes of focal fishery and aquaculture species along Baja California, Mexico
Defensible standardized ploidy assessments for Grass Carp (Ctenopharyngodon idella, Cyprinidae) intercepted from the commercial supply chain
Assessing the risk of diploid grass carp Ctenopharyngodon idella in the certified triploid supply chain in Ohio
Sperm quality biomarkers complement reproductive and endocrine parameters in investigating environmental contaminants in common carp (Cyprinus carpio) from the Lake Mead National Recreation Area
Non-USGS Publications**
**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.