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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
An aerial view of a fish laying on the ground

Determining the Ploidy and Resultant Reproductive Capability of Artificially Spawned and Wild Caught Invasive Carp

The invasive grass carp and black carp are artificially spawned to produce triploids, which means they have three sets of chromosomes and are sterile. WARC scientists invented an early ploidy prediction process for produced fry, and a post-mortem assessment method for carp caught either in the wild or sold and hauled live to other states.
By
Ecosystems Mission Area, Biological Threats and Invasive Species Research Program, Wetland and Aquatic Research Center
Determining the Ploidy and Resultant Reproductive Capability of Artificially Spawned and Wild Caught Invasive Carp

Determining the Ploidy and Resultant Reproductive Capability of Artificially Spawned and Wild Caught Invasive Carp

The invasive grass carp and black carp are artificially spawned to produce triploids, which means they have three sets of chromosomes and are sterile. WARC scientists invented an early ploidy prediction process for produced fry, and a post-mortem assessment method for carp caught either in the wild or sold and hauled live to other states.
Learn More
Honey bee (Apis mellifera)

Pollinator Germplasm as a Genetic Resource for Conservation

Honey bee colony failure is primarily due to the infestation of mites and agricultural pesticides, including neonicotinoids. USGS researches the impacts these have on honey bee reproductive capabilities.
By
Ecosystems Mission Area, Species Management Research Program, Wetland and Aquatic Research Center
Pollinator Germplasm as a Genetic Resource for Conservation

Pollinator Germplasm as a Genetic Resource for Conservation

Honey bee colony failure is primarily due to the infestation of mites and agricultural pesticides, including neonicotinoids. USGS researches the impacts these have on honey bee reproductive capabilities.
Learn More
Map of Neonicotinoid insecticide Thiamethoxam use 2011 (USGS-NAQWA)

Use of a Sustained-Release Chemical Delivery Device in Assessing Effects of Systemic Insecticides

Neonicotinoid insecticides the fastest growing insecticide worldwide - and may play a role in the declines of terrestrial and aquatic vertebrate species.
By
Ecosystems Mission Area, Contaminant Biology, Species Management Research Program, Wetland and Aquatic Research Center
Use of a Sustained-Release Chemical Delivery Device in Assessing Effects of Systemic Insecticides

Use of a Sustained-Release Chemical Delivery Device in Assessing Effects of Systemic Insecticides

Neonicotinoid insecticides the fastest growing insecticide worldwide - and may play a role in the declines of terrestrial and aquatic vertebrate species.
Learn More
Filter Total Items: 17

Discerning innate immunity in American kestrels, Falco sparverius, through 21 days post-hatch Discerning innate immunity in American kestrels, Falco sparverius, 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 software to be analyzed by any other type.
By
Ecosystems Mission Area, Contaminant Biology, Environmental Health Program, Toxic Substances Hydrology, Wetland and Aquatic Research Center

Gene expression and liver cell metabolism from Xenopus laevis tadpoles exposed to neonicotinoids Gene expression and liver cell metabolism from Xenopus laevis tadpoles exposed to neonicotinoids

Data were collected from Xenopus laevis tadpoles exposed to clothianidin and thiamethoxam in two concentrations each, 100 ppm and 20 ppm. Gene expression was generated from brains and livers, and liver cells provided metabolic activity data.
By
Wetland and Aquatic Research Center

Ploidy and genome size estimates of artificially produced larval pallid sturgeon, Scaphirhynchus albus Ploidy and genome size estimates of artificially produced larval pallid sturgeon, Scaphirhynchus albus

Data consist of flow cytometry files (.FCS) that were generated in the analysis of larval pallid sturgeon specimens. Nuclei from produced larval sturgeon somatic cells were analyzed using flow cytometry to estimate genome size and assign ploidy. Freshly collected rainbow trout (Oncorhynchus mykiss), largemouth bass (Micropterus salmoides), or pallid sturgeon blood were used as external...
By
Columbia Environmental Research Center

Establishing a standard ploidy assessment method using grass carp from Ohio, 2015-2016 Establishing a standard ploidy assessment method using grass carp from Ohio, 2015-2016

In 2015-2016, the Ohio Division of Wildlife's undercover law enforcement purchased 1,200 grass carp (Ctenopharyngodon idella). Fish heads and eyeballs were sent overnight to U.S. Geological Survey Wetland and Aquatic Research Center for ploidy analysis. Field and laboratory standard operating procedures were established and followed. Fish lengths, fish weights, and eyeball weights were...
By
Wetland and Aquatic Research Center

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) 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)

Lake Mead National Recreational Area (LMNRA) serves as critical habitat for several federally listed species and supplies water for municipal, domestic, and agricultural use in the Southwestern U.S. Contaminant sources and concentrations vary among sub-basins within LMNRA. To investigate whether environmental contaminant exposure is associated with alterations in male common carp...
By
Wetland and Aquatic Research Center
No results found.
Filter Total Items: 72

Defensible standardized ploidy assessments for Grass Carp (Ctenopharyngodon idella, Cyprinidae) intercepted from the commercial supply chain Defensible standardized ploidy assessments for Grass Carp (Ctenopharyngodon idella, Cyprinidae) intercepted from the commercial supply chain

Although methods are in place through the U.S. Fish and Wildlife (USFWS) program for ploidy testing of feral caught Grass Carp (Ctenopharyngodon idella) and black carp (Mylopharyngodon piceus), no guidelines exist for carp hauled across state lines. Using 1200 Grass Carp purchased by undercover Ohio law enforcement during 2015–2016, we developed a standardized protocol for discriminating...
Authors
Jill A. Jenkins, Megan D. Chauvin, Darren Johnson, Bonnie L. Brown, Jennifer Bailey, Anita M. Kelly, Bryan T. Kinter
By
Ecosystems Mission Area, Biological Threats and Invasive Species Research Program, Wetland and Aquatic Research Center

Assessing the risk of diploid grass carp Ctenopharyngodon idella in the certified triploid supply chain in Ohio Assessing the risk of diploid grass carp Ctenopharyngodon idella in the certified triploid supply chain in Ohio

Non-native grass carp (Ctenopharyngodon idella) have been stocked in the United States for vegetation control since the 1970s, and recent evidence suggests some natural reproduction in the Great Lakes basin. Despite all states and provinces bordering Lake Erie either banning grass carp or requiring imports of only sterile, U.S. Fish and Wildlife Service (USFWS)-certified triploids, the...
Authors
Bryan T. Kinter, Jill A. Jenkins, Jeff T. Tyson
By
Ecosystems Mission Area, Biological Threats and Invasive Species Research Program, Wetland and Aquatic Research Center

Sperm quality biomarkers complement reproductive and endocrine parameters in investigating environmental contaminants in common carp (Cyprinus carpio) from the Lake Mead National Recreation Area Sperm quality biomarkers complement reproductive and endocrine parameters in investigating environmental contaminants in common carp (Cyprinus carpio) from the Lake Mead National Recreation Area

Lake Mead National Recreational Area (LMNRA) serves as critical habitat for several federally listed species and supplies water for municipal, domestic, and agricultural use in the Southwestern U.S. Contaminant sources and concentrations vary among the sub-basins within LMNRA. To investigate whether exposure to environmental contaminants is associated with alterations in male common carp...
Authors
Jill A. Jenkins, Michael R. Rosen, Rassa O. Dale, Kathy R. Echols, Leticia Torres, Carla M. Wieser, Constance A. Kersten, S. Goodbred
By
Ecosystems Mission Area, Columbia Environmental Research Center, Wetland and Aquatic Research Center

An accurate method for measuring triploidy of larval fish spawns An accurate method for measuring triploidy of larval fish spawns

A standard flow cytometric protocol was developed for estimating triploid induction in batches of larval fish. Polyploid induction treatments are not guaranteed to be 100% efficient, thus the ability to quantify the proportion of triploid larvae generated by a particular treatment helps managers to stock high-percentage spawns and researchers to select treatments for efficient triploid...
Authors
Jill A. Jenkins, Rassa O. Draugelis-Dale, Robert Glennon, Anita M. Kelly, Bonnie L. Brown, John Morrison
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

A pilot study testing a natural and a synthetic Molluscicide for controlling invasive apple snails (Pomacea maculata) A pilot study testing a natural and a synthetic Molluscicide for controlling invasive apple snails (Pomacea maculata)

Pomacea maculata (formerly P. insularum), an apple snail native to South America, was discovered in Louisiana in 2008. These snails strip vegetation, reproduce at tremendous rates, and have reduced rice production and caused ecosystem changes in Asia. In this pilot study snails were exposed to two molluscicides, a tea (Camellia sinensis) seed derivative (TSD) or niclosamide monohydrate...
Authors
Heather M. Olivier, Jill A. Jenkins, Mark Berhow, Jacoby Carter
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

Hyla chrysoscelis (Cope’s gray treefrog) x Hyla cinerea (green treefrog): putative natural hybrid Hyla chrysoscelis (Cope’s gray treefrog) x Hyla cinerea (green treefrog): putative natural hybrid

Naturally–occurring hybrid treefrogs have been occasionally found in the eastern United States. However, these hybrids are almost always between members of the same species group. On 10 Jun 2014, at 2145 h, we located an individual making an unusual advertisement call along Bayou Manual Road in Sherburne Wildlife Management Area in the Atchafalaya Basin of south-central Louisiana, USA...
Authors
Brad M. Glorioso, J. Hardin Waddle, Jill A. Jenkins, Heather M. Olivier, Rebekah R. Layton
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

Novel associations between contaminant body burdens and biomarkers of reproductive condition in male Common Carp along multiple gradients of contaminant exposure in Lake Mead National Recreation Area, USA Novel associations between contaminant body burdens and biomarkers of reproductive condition in male Common Carp along multiple gradients of contaminant exposure in Lake Mead National Recreation Area, USA

Adult male Common Carp were sampled in 2007/08 over a full reproductive cycle at Lake Mead National Recreation Area. Sites sampled included a stream dominated by treated wastewater effluent, a lake basin receiving the streamflow, an upstream lake basin (reference), and a site below Hoover Dam. Individual body burdens for 252 contaminants were measured, and biological variables assessed...
Authors
Reynaldo Patino, Matthew M. VanLandeghem, Steven L. Goodbred, Erik Orsak, Jill A. Jenkins, Kathy R. Echols, Michael R. Rosen, Leticia Torres
By
Ecosystems Mission Area, Cooperative Research Units, Wetland and Aquatic Research Center

Are endocrine and reproductive biomarkers altered in contaminant-exposed wild male Largemouth Bass (Micropterus salmoides) of Lake Mead, Nevada/Arizona, USA? Are endocrine and reproductive biomarkers altered in contaminant-exposed wild male Largemouth Bass (Micropterus salmoides) of Lake Mead, Nevada/Arizona, USA?

Male Largemouth Bass were sampled from two locations in Lake Mead (USA), a site influenced by treated municipal wastewater effluent and urban runoff (Las Vegas Bay), and a reference site (Overton Arm). Samples were collected in summer (July '07) and spring (March '08) to assess general health, endocrine and reproductive biomarkers, and compare contaminant body burdens by analyzing 252...
Authors
Steven L. Goodbred, Reynaldo Patino, Leticia Torres, Kathy R. Echols, Jill A. Jenkins, Michael R. Rosen, Erik Orsak
By
Ecosystems Mission Area, Cooperative Research Units, Columbia Environmental Research Center, Wetland and Aquatic Research Center

Flow cytometric method for measuring chromatin fragmentation in fixed sperm from yellow perch (Perca flavescens) Flow cytometric method for measuring chromatin fragmentation in fixed sperm from yellow perch (Perca flavescens)

Declining harvests of yellow perch, Perca flavescens, in urbanized watersheds of Chesapeake Bay have prompted investigations of their reproductive fitness. The purpose of this study was to establish a flow cytometric technique for DNA analysis of fixed samples sent from the field to provide reliable gamete quality measurements. Similar to the sperm chromatin structure assay, measures...
Authors
Jill A. Jenkins, Rassa O. Draugelis-Dale, Alfred E. Pinkney, Luke R. Iwanowicz, Vicki Blazer
By
Ecosystems Mission Area, Contaminant Biology, Environmental Health Program, Wetland and Aquatic Research Center

Proper handling of animal tissues from the field to the laboratory supports reliable biomarker endpoints Proper handling of animal tissues from the field to the laboratory supports reliable biomarker endpoints

In the endeavor to assess potential effects to the Gulf of Mexico ecosystem from the Mississippi Canyon 252 incident, referred to as the Deepwater Horizon oil spill, various environmental data have been collected. Whereas initial efforts have included satellite tracking and sediment and water sampling to estimate the geographical scope of oiling, research on biological samples can...
Authors
Heather M. Olivier, Jill A. Jenkins
By
Ecosystems Mission Area, Wetland and Aquatic Research Center , Gulf of America

Guidelines for use of fishes in research: Revised and expanded Guidelines for use of fishes in research: Revised and expanded

The Guidelines for the Use of Fishes in Research (2014; 2014 Guidelines), now available through the American fisheries Society (AFS) website and in print from the AFS bookstore, is a resource to aid researchers and regulatory authorities regarding responsible, scientifically valid research on fish and aquatic wildlife. The Guidelines for the Use of Fishes in Field Research (American...
Authors
Jill A. Jenkins, Henry L. Bart, James D. Bowker, Paul R. Bowser, J. Randy MacMillan, John G. Nickum, Joseph W. Rachlin, James D. Rose, Peter W. Sorensen, Barbara E. Warkentine, Greg W. Whitledge
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

Guidelines for use of fishes in research Guidelines for use of fishes in research

The 2004 and 2014 Guidelines were developed to provide a structure that advances appropriate attention toward valid experimental designs and procedures with aquatic animals while ensuring humane treatment of the experimental subjects. At a practical level, the Guidelines are intended to provide general recommendations on field and laboratory endeavors, such as sampling, holding, and...
Authors
J. A. Jenkins, H.L. Bart, James D. Bowker, P.R. Bowser, J.R. MacMillan, J.G. Nickum, J. D. Rose, P. W. Sorenson, G.W. Whitledge, J.W. Rachlin, B.E. Warkentine, H. L. Bart
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
An aerial view of a fish laying on the ground

Determining the Ploidy and Resultant Reproductive Capability of Artificially Spawned and Wild Caught Invasive Carp

The invasive grass carp and black carp are artificially spawned to produce triploids, which means they have three sets of chromosomes and are sterile. WARC scientists invented an early ploidy prediction process for produced fry, and a post-mortem assessment method for carp caught either in the wild or sold and hauled live to other states.
By
Ecosystems Mission Area, Biological Threats and Invasive Species Research Program, Wetland and Aquatic Research Center
Determining the Ploidy and Resultant Reproductive Capability of Artificially Spawned and Wild Caught Invasive Carp

Determining the Ploidy and Resultant Reproductive Capability of Artificially Spawned and Wild Caught Invasive Carp

The invasive grass carp and black carp are artificially spawned to produce triploids, which means they have three sets of chromosomes and are sterile. WARC scientists invented an early ploidy prediction process for produced fry, and a post-mortem assessment method for carp caught either in the wild or sold and hauled live to other states.
Learn More
Honey bee (Apis mellifera)

Pollinator Germplasm as a Genetic Resource for Conservation

Honey bee colony failure is primarily due to the infestation of mites and agricultural pesticides, including neonicotinoids. USGS researches the impacts these have on honey bee reproductive capabilities.
By
Ecosystems Mission Area, Species Management Research Program, Wetland and Aquatic Research Center
Pollinator Germplasm as a Genetic Resource for Conservation

Pollinator Germplasm as a Genetic Resource for Conservation

Honey bee colony failure is primarily due to the infestation of mites and agricultural pesticides, including neonicotinoids. USGS researches the impacts these have on honey bee reproductive capabilities.
Learn More
Map of Neonicotinoid insecticide Thiamethoxam use 2011 (USGS-NAQWA)

Use of a Sustained-Release Chemical Delivery Device in Assessing Effects of Systemic Insecticides

Neonicotinoid insecticides the fastest growing insecticide worldwide - and may play a role in the declines of terrestrial and aquatic vertebrate species.
By
Ecosystems Mission Area, Contaminant Biology, Species Management Research Program, Wetland and Aquatic Research Center
Use of a Sustained-Release Chemical Delivery Device in Assessing Effects of Systemic Insecticides

Use of a Sustained-Release Chemical Delivery Device in Assessing Effects of Systemic Insecticides

Neonicotinoid insecticides the fastest growing insecticide worldwide - and may play a role in the declines of terrestrial and aquatic vertebrate species.
Learn More
Filter Total Items: 17

Discerning innate immunity in American kestrels, Falco sparverius, through 21 days post-hatch Discerning innate immunity in American kestrels, Falco sparverius, 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 software to be analyzed by any other type.
By
Ecosystems Mission Area, Contaminant Biology, Environmental Health Program, Toxic Substances Hydrology, Wetland and Aquatic Research Center

Gene expression and liver cell metabolism from Xenopus laevis tadpoles exposed to neonicotinoids Gene expression and liver cell metabolism from Xenopus laevis tadpoles exposed to neonicotinoids

Data were collected from Xenopus laevis tadpoles exposed to clothianidin and thiamethoxam in two concentrations each, 100 ppm and 20 ppm. Gene expression was generated from brains and livers, and liver cells provided metabolic activity data.
By
Wetland and Aquatic Research Center

Ploidy and genome size estimates of artificially produced larval pallid sturgeon, Scaphirhynchus albus Ploidy and genome size estimates of artificially produced larval pallid sturgeon, Scaphirhynchus albus

Data consist of flow cytometry files (.FCS) that were generated in the analysis of larval pallid sturgeon specimens. Nuclei from produced larval sturgeon somatic cells were analyzed using flow cytometry to estimate genome size and assign ploidy. Freshly collected rainbow trout (Oncorhynchus mykiss), largemouth bass (Micropterus salmoides), or pallid sturgeon blood were used as external...
By
Columbia Environmental Research Center

Establishing a standard ploidy assessment method using grass carp from Ohio, 2015-2016 Establishing a standard ploidy assessment method using grass carp from Ohio, 2015-2016

In 2015-2016, the Ohio Division of Wildlife's undercover law enforcement purchased 1,200 grass carp (Ctenopharyngodon idella). Fish heads and eyeballs were sent overnight to U.S. Geological Survey Wetland and Aquatic Research Center for ploidy analysis. Field and laboratory standard operating procedures were established and followed. Fish lengths, fish weights, and eyeball weights were...
By
Wetland and Aquatic Research Center

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) 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)

Lake Mead National Recreational Area (LMNRA) serves as critical habitat for several federally listed species and supplies water for municipal, domestic, and agricultural use in the Southwestern U.S. Contaminant sources and concentrations vary among sub-basins within LMNRA. To investigate whether environmental contaminant exposure is associated with alterations in male common carp...
By
Wetland and Aquatic Research Center
No results found.
Filter Total Items: 72

Defensible standardized ploidy assessments for Grass Carp (Ctenopharyngodon idella, Cyprinidae) intercepted from the commercial supply chain Defensible standardized ploidy assessments for Grass Carp (Ctenopharyngodon idella, Cyprinidae) intercepted from the commercial supply chain

Although methods are in place through the U.S. Fish and Wildlife (USFWS) program for ploidy testing of feral caught Grass Carp (Ctenopharyngodon idella) and black carp (Mylopharyngodon piceus), no guidelines exist for carp hauled across state lines. Using 1200 Grass Carp purchased by undercover Ohio law enforcement during 2015–2016, we developed a standardized protocol for discriminating...
Authors
Jill A. Jenkins, Megan D. Chauvin, Darren Johnson, Bonnie L. Brown, Jennifer Bailey, Anita M. Kelly, Bryan T. Kinter
By
Ecosystems Mission Area, Biological Threats and Invasive Species Research Program, Wetland and Aquatic Research Center

Assessing the risk of diploid grass carp Ctenopharyngodon idella in the certified triploid supply chain in Ohio Assessing the risk of diploid grass carp Ctenopharyngodon idella in the certified triploid supply chain in Ohio

Non-native grass carp (Ctenopharyngodon idella) have been stocked in the United States for vegetation control since the 1970s, and recent evidence suggests some natural reproduction in the Great Lakes basin. Despite all states and provinces bordering Lake Erie either banning grass carp or requiring imports of only sterile, U.S. Fish and Wildlife Service (USFWS)-certified triploids, the...
Authors
Bryan T. Kinter, Jill A. Jenkins, Jeff T. Tyson
By
Ecosystems Mission Area, Biological Threats and Invasive Species Research Program, Wetland and Aquatic Research Center

Sperm quality biomarkers complement reproductive and endocrine parameters in investigating environmental contaminants in common carp (Cyprinus carpio) from the Lake Mead National Recreation Area Sperm quality biomarkers complement reproductive and endocrine parameters in investigating environmental contaminants in common carp (Cyprinus carpio) from the Lake Mead National Recreation Area

Lake Mead National Recreational Area (LMNRA) serves as critical habitat for several federally listed species and supplies water for municipal, domestic, and agricultural use in the Southwestern U.S. Contaminant sources and concentrations vary among the sub-basins within LMNRA. To investigate whether exposure to environmental contaminants is associated with alterations in male common carp...
Authors
Jill A. Jenkins, Michael R. Rosen, Rassa O. Dale, Kathy R. Echols, Leticia Torres, Carla M. Wieser, Constance A. Kersten, S. Goodbred
By
Ecosystems Mission Area, Columbia Environmental Research Center, Wetland and Aquatic Research Center

An accurate method for measuring triploidy of larval fish spawns An accurate method for measuring triploidy of larval fish spawns

A standard flow cytometric protocol was developed for estimating triploid induction in batches of larval fish. Polyploid induction treatments are not guaranteed to be 100% efficient, thus the ability to quantify the proportion of triploid larvae generated by a particular treatment helps managers to stock high-percentage spawns and researchers to select treatments for efficient triploid...
Authors
Jill A. Jenkins, Rassa O. Draugelis-Dale, Robert Glennon, Anita M. Kelly, Bonnie L. Brown, John Morrison
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

A pilot study testing a natural and a synthetic Molluscicide for controlling invasive apple snails (Pomacea maculata) A pilot study testing a natural and a synthetic Molluscicide for controlling invasive apple snails (Pomacea maculata)

Pomacea maculata (formerly P. insularum), an apple snail native to South America, was discovered in Louisiana in 2008. These snails strip vegetation, reproduce at tremendous rates, and have reduced rice production and caused ecosystem changes in Asia. In this pilot study snails were exposed to two molluscicides, a tea (Camellia sinensis) seed derivative (TSD) or niclosamide monohydrate...
Authors
Heather M. Olivier, Jill A. Jenkins, Mark Berhow, Jacoby Carter
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

Hyla chrysoscelis (Cope’s gray treefrog) x Hyla cinerea (green treefrog): putative natural hybrid Hyla chrysoscelis (Cope’s gray treefrog) x Hyla cinerea (green treefrog): putative natural hybrid

Naturally–occurring hybrid treefrogs have been occasionally found in the eastern United States. However, these hybrids are almost always between members of the same species group. On 10 Jun 2014, at 2145 h, we located an individual making an unusual advertisement call along Bayou Manual Road in Sherburne Wildlife Management Area in the Atchafalaya Basin of south-central Louisiana, USA...
Authors
Brad M. Glorioso, J. Hardin Waddle, Jill A. Jenkins, Heather M. Olivier, Rebekah R. Layton
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

Novel associations between contaminant body burdens and biomarkers of reproductive condition in male Common Carp along multiple gradients of contaminant exposure in Lake Mead National Recreation Area, USA Novel associations between contaminant body burdens and biomarkers of reproductive condition in male Common Carp along multiple gradients of contaminant exposure in Lake Mead National Recreation Area, USA

Adult male Common Carp were sampled in 2007/08 over a full reproductive cycle at Lake Mead National Recreation Area. Sites sampled included a stream dominated by treated wastewater effluent, a lake basin receiving the streamflow, an upstream lake basin (reference), and a site below Hoover Dam. Individual body burdens for 252 contaminants were measured, and biological variables assessed...
Authors
Reynaldo Patino, Matthew M. VanLandeghem, Steven L. Goodbred, Erik Orsak, Jill A. Jenkins, Kathy R. Echols, Michael R. Rosen, Leticia Torres
By
Ecosystems Mission Area, Cooperative Research Units, Wetland and Aquatic Research Center

Are endocrine and reproductive biomarkers altered in contaminant-exposed wild male Largemouth Bass (Micropterus salmoides) of Lake Mead, Nevada/Arizona, USA? Are endocrine and reproductive biomarkers altered in contaminant-exposed wild male Largemouth Bass (Micropterus salmoides) of Lake Mead, Nevada/Arizona, USA?

Male Largemouth Bass were sampled from two locations in Lake Mead (USA), a site influenced by treated municipal wastewater effluent and urban runoff (Las Vegas Bay), and a reference site (Overton Arm). Samples were collected in summer (July '07) and spring (March '08) to assess general health, endocrine and reproductive biomarkers, and compare contaminant body burdens by analyzing 252...
Authors
Steven L. Goodbred, Reynaldo Patino, Leticia Torres, Kathy R. Echols, Jill A. Jenkins, Michael R. Rosen, Erik Orsak
By
Ecosystems Mission Area, Cooperative Research Units, Columbia Environmental Research Center, Wetland and Aquatic Research Center

Flow cytometric method for measuring chromatin fragmentation in fixed sperm from yellow perch (Perca flavescens) Flow cytometric method for measuring chromatin fragmentation in fixed sperm from yellow perch (Perca flavescens)

Declining harvests of yellow perch, Perca flavescens, in urbanized watersheds of Chesapeake Bay have prompted investigations of their reproductive fitness. The purpose of this study was to establish a flow cytometric technique for DNA analysis of fixed samples sent from the field to provide reliable gamete quality measurements. Similar to the sperm chromatin structure assay, measures...
Authors
Jill A. Jenkins, Rassa O. Draugelis-Dale, Alfred E. Pinkney, Luke R. Iwanowicz, Vicki Blazer
By
Ecosystems Mission Area, Contaminant Biology, Environmental Health Program, Wetland and Aquatic Research Center

Proper handling of animal tissues from the field to the laboratory supports reliable biomarker endpoints Proper handling of animal tissues from the field to the laboratory supports reliable biomarker endpoints

In the endeavor to assess potential effects to the Gulf of Mexico ecosystem from the Mississippi Canyon 252 incident, referred to as the Deepwater Horizon oil spill, various environmental data have been collected. Whereas initial efforts have included satellite tracking and sediment and water sampling to estimate the geographical scope of oiling, research on biological samples can...
Authors
Heather M. Olivier, Jill A. Jenkins
By
Ecosystems Mission Area, Wetland and Aquatic Research Center , Gulf of America

Guidelines for use of fishes in research: Revised and expanded Guidelines for use of fishes in research: Revised and expanded

The Guidelines for the Use of Fishes in Research (2014; 2014 Guidelines), now available through the American fisheries Society (AFS) website and in print from the AFS bookstore, is a resource to aid researchers and regulatory authorities regarding responsible, scientifically valid research on fish and aquatic wildlife. The Guidelines for the Use of Fishes in Field Research (American...
Authors
Jill A. Jenkins, Henry L. Bart, James D. Bowker, Paul R. Bowser, J. Randy MacMillan, John G. Nickum, Joseph W. Rachlin, James D. Rose, Peter W. Sorensen, Barbara E. Warkentine, Greg W. Whitledge
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

Guidelines for use of fishes in research Guidelines for use of fishes in research

The 2004 and 2014 Guidelines were developed to provide a structure that advances appropriate attention toward valid experimental designs and procedures with aquatic animals while ensuring humane treatment of the experimental subjects. At a practical level, the Guidelines are intended to provide general recommendations on field and laboratory endeavors, such as sampling, holding, and...
Authors
J. A. Jenkins, H.L. Bart, James D. Bowker, P.R. Bowser, J.R. MacMillan, J.G. Nickum, J. D. Rose, P. W. Sorenson, G.W. Whitledge, J.W. Rachlin, B.E. Warkentine, H. L. Bart
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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